Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Health-checks functions. |
| 3 | * |
Willy Tarreau | 26c2506 | 2009-03-08 09:38:41 +0100 | [diff] [blame] | 4 | * Copyright 2000-2009 Willy Tarreau <w@1wt.eu> |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 5 | * Copyright 2007-2009 Krzysztof Piotr Oledzki <ole@ans.pl> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | */ |
| 13 | |
Willy Tarreau | b881608 | 2008-01-18 12:18:15 +0100 | [diff] [blame] | 14 | #include <assert.h> |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 15 | #include <ctype.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 16 | #include <errno.h> |
| 17 | #include <fcntl.h> |
Willy Tarreau | 9b39dc5 | 2014-07-08 00:54:10 +0200 | [diff] [blame] | 18 | #include <signal.h> |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 19 | #include <stdarg.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 20 | #include <stdio.h> |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 21 | #include <stdlib.h> |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 22 | #include <string.h> |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 23 | #include <time.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 24 | #include <unistd.h> |
Willy Tarreau | 9f6dc72 | 2019-03-01 11:15:10 +0100 | [diff] [blame] | 25 | #include <sys/resource.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 26 | #include <sys/socket.h> |
Dmitry Sivachenko | caf5898 | 2009-08-24 15:11:06 +0400 | [diff] [blame] | 27 | #include <sys/types.h> |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 28 | #include <sys/wait.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 29 | #include <netinet/in.h> |
Willy Tarreau | 1274bc4 | 2009-07-15 07:16:31 +0200 | [diff] [blame] | 30 | #include <netinet/tcp.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 31 | #include <arpa/inet.h> |
| 32 | |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 33 | #include <common/cfgparse.h> |
Willy Tarreau | c7e4238 | 2012-08-24 19:22:53 +0200 | [diff] [blame] | 34 | #include <common/chunk.h> |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 35 | #include <common/compat.h> |
| 36 | #include <common/config.h> |
| 37 | #include <common/mini-clist.h> |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 38 | #include <common/standard.h> |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 39 | #include <common/time.h> |
Christopher Faulet | cfda847 | 2017-10-20 15:40:23 +0200 | [diff] [blame] | 40 | #include <common/hathreads.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 41 | |
| 42 | #include <types/global.h> |
Baptiste Assmann | a68ca96 | 2015-04-14 01:15:08 +0200 | [diff] [blame] | 43 | #include <types/dns.h> |
William Lallemand | 9ed6203 | 2016-11-21 17:49:11 +0100 | [diff] [blame] | 44 | #include <types/stats.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 45 | |
Gaetan Rivet | 707b52f | 2020-02-21 18:14:59 +0100 | [diff] [blame] | 46 | #include <proto/action.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 47 | #include <proto/backend.h> |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 48 | #include <proto/checks.h> |
William Lallemand | 9ed6203 | 2016-11-21 17:49:11 +0100 | [diff] [blame] | 49 | #include <proto/stats.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 50 | #include <proto/fd.h> |
| 51 | #include <proto/log.h> |
Willy Tarreau | 53a4766 | 2017-08-28 10:53:00 +0200 | [diff] [blame] | 52 | #include <proto/mux_pt.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 53 | #include <proto/queue.h> |
Willy Tarreau | c6f4ce8 | 2009-06-10 11:09:37 +0200 | [diff] [blame] | 54 | #include <proto/port_range.h> |
Willy Tarreau | e8c66af | 2008-01-13 18:40:14 +0100 | [diff] [blame] | 55 | #include <proto/proto_tcp.h> |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 56 | #include <proto/protocol.h> |
Willy Tarreau | 2b5652f | 2006-12-31 17:46:05 +0100 | [diff] [blame] | 57 | #include <proto/proxy.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 58 | #include <proto/server.h> |
Willy Tarreau | 48d6bf2 | 2016-06-21 16:27:34 +0200 | [diff] [blame] | 59 | #include <proto/signal.h> |
Willy Tarreau | 9e000c6 | 2011-03-10 14:03:36 +0100 | [diff] [blame] | 60 | #include <proto/stream_interface.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 61 | #include <proto/task.h> |
Gaetan Rivet | 13a5043 | 2020-02-21 18:13:44 +0100 | [diff] [blame] | 62 | #include <proto/vars.h> |
Baptiste Assmann | a68ca96 | 2015-04-14 01:15:08 +0200 | [diff] [blame] | 63 | #include <proto/log.h> |
| 64 | #include <proto/dns.h> |
| 65 | #include <proto/proto_udp.h> |
Olivier Houchard | 9130a96 | 2017-10-17 17:33:43 +0200 | [diff] [blame] | 66 | #include <proto/ssl_sock.h> |
Olivier Houchard | 9130a96 | 2017-10-17 17:33:43 +0200 | [diff] [blame] | 67 | |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 68 | static int httpchk_expect(struct server *s, int done); |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 69 | static int tcpcheck_get_step_id(struct check *, struct tcpcheck_rule *); |
| 70 | static char *tcpcheck_get_step_comment(struct check *, struct tcpcheck_rule *); |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 71 | static int tcpcheck_main(struct check *); |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 72 | static void __event_srv_chk_w(struct conn_stream *cs); |
Olivier Houchard | 4501c3e | 2018-08-28 19:36:18 +0200 | [diff] [blame] | 73 | static int wake_srv_chk(struct conn_stream *cs); |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 74 | static void __event_srv_chk_r(struct conn_stream *cs); |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 75 | |
Christopher Faulet | 31c30fd | 2020-03-26 21:10:03 +0100 | [diff] [blame] | 76 | static int srv_check_healthcheck_port(struct check *chk); |
| 77 | |
Willy Tarreau | 8ceae72 | 2018-11-26 11:58:30 +0100 | [diff] [blame] | 78 | DECLARE_STATIC_POOL(pool_head_email_alert, "email_alert", sizeof(struct email_alert)); |
| 79 | DECLARE_STATIC_POOL(pool_head_tcpcheck_rule, "tcpcheck_rule", sizeof(struct tcpcheck_rule)); |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 80 | |
Gaetan Rivet | 05d692d | 2020-02-14 17:42:54 +0100 | [diff] [blame] | 81 | /* Dummy frontend used to create all checks sessions. */ |
| 82 | static struct proxy checks_fe; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 83 | |
Simon Horman | 63a4a82 | 2012-03-19 07:24:41 +0900 | [diff] [blame] | 84 | static const struct check_status check_statuses[HCHK_STATUS_SIZE] = { |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 85 | [HCHK_STATUS_UNKNOWN] = { CHK_RES_UNKNOWN, "UNK", "Unknown" }, |
| 86 | [HCHK_STATUS_INI] = { CHK_RES_UNKNOWN, "INI", "Initializing" }, |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 87 | [HCHK_STATUS_START] = { /* SPECIAL STATUS*/ }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 88 | |
Willy Tarreau | 2396418 | 2014-05-20 20:56:30 +0200 | [diff] [blame] | 89 | /* Below we have finished checks */ |
| 90 | [HCHK_STATUS_CHECKED] = { CHK_RES_NEUTRAL, "CHECKED", "No status change" }, |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 91 | [HCHK_STATUS_HANA] = { CHK_RES_FAILED, "HANA", "Health analyze" }, |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 92 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 93 | [HCHK_STATUS_SOCKERR] = { CHK_RES_FAILED, "SOCKERR", "Socket error" }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 94 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 95 | [HCHK_STATUS_L4OK] = { CHK_RES_PASSED, "L4OK", "Layer4 check passed" }, |
| 96 | [HCHK_STATUS_L4TOUT] = { CHK_RES_FAILED, "L4TOUT", "Layer4 timeout" }, |
| 97 | [HCHK_STATUS_L4CON] = { CHK_RES_FAILED, "L4CON", "Layer4 connection problem" }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 98 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 99 | [HCHK_STATUS_L6OK] = { CHK_RES_PASSED, "L6OK", "Layer6 check passed" }, |
| 100 | [HCHK_STATUS_L6TOUT] = { CHK_RES_FAILED, "L6TOUT", "Layer6 timeout" }, |
| 101 | [HCHK_STATUS_L6RSP] = { CHK_RES_FAILED, "L6RSP", "Layer6 invalid response" }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 102 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 103 | [HCHK_STATUS_L7TOUT] = { CHK_RES_FAILED, "L7TOUT", "Layer7 timeout" }, |
| 104 | [HCHK_STATUS_L7RSP] = { CHK_RES_FAILED, "L7RSP", "Layer7 invalid response" }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 105 | |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 106 | [HCHK_STATUS_L57DATA] = { /* DUMMY STATUS */ }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 107 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 108 | [HCHK_STATUS_L7OKD] = { CHK_RES_PASSED, "L7OK", "Layer7 check passed" }, |
| 109 | [HCHK_STATUS_L7OKCD] = { CHK_RES_CONDPASS, "L7OKC", "Layer7 check conditionally passed" }, |
| 110 | [HCHK_STATUS_L7STS] = { CHK_RES_FAILED, "L7STS", "Layer7 wrong status" }, |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 111 | |
| 112 | [HCHK_STATUS_PROCERR] = { CHK_RES_FAILED, "PROCERR", "External check error" }, |
| 113 | [HCHK_STATUS_PROCTOUT] = { CHK_RES_FAILED, "PROCTOUT", "External check timeout" }, |
Cyril Bonté | 77010d8 | 2014-08-07 01:55:37 +0200 | [diff] [blame] | 114 | [HCHK_STATUS_PROCOK] = { CHK_RES_PASSED, "PROCOK", "External check passed" }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 115 | }; |
| 116 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 117 | const struct extcheck_env extcheck_envs[EXTCHK_SIZE] = { |
| 118 | [EXTCHK_PATH] = { "PATH", EXTCHK_SIZE_EVAL_INIT }, |
| 119 | [EXTCHK_HAPROXY_PROXY_NAME] = { "HAPROXY_PROXY_NAME", EXTCHK_SIZE_EVAL_INIT }, |
| 120 | [EXTCHK_HAPROXY_PROXY_ID] = { "HAPROXY_PROXY_ID", EXTCHK_SIZE_EVAL_INIT }, |
| 121 | [EXTCHK_HAPROXY_PROXY_ADDR] = { "HAPROXY_PROXY_ADDR", EXTCHK_SIZE_EVAL_INIT }, |
| 122 | [EXTCHK_HAPROXY_PROXY_PORT] = { "HAPROXY_PROXY_PORT", EXTCHK_SIZE_EVAL_INIT }, |
| 123 | [EXTCHK_HAPROXY_SERVER_NAME] = { "HAPROXY_SERVER_NAME", EXTCHK_SIZE_EVAL_INIT }, |
| 124 | [EXTCHK_HAPROXY_SERVER_ID] = { "HAPROXY_SERVER_ID", EXTCHK_SIZE_EVAL_INIT }, |
Christopher Faulet | aaae9a0 | 2020-04-26 09:50:31 +0200 | [diff] [blame] | 125 | [EXTCHK_HAPROXY_SERVER_ADDR] = { "HAPROXY_SERVER_ADDR", EXTCHK_SIZE_ADDR }, |
| 126 | [EXTCHK_HAPROXY_SERVER_PORT] = { "HAPROXY_SERVER_PORT", EXTCHK_SIZE_UINT }, |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 127 | [EXTCHK_HAPROXY_SERVER_MAXCONN] = { "HAPROXY_SERVER_MAXCONN", EXTCHK_SIZE_EVAL_INIT }, |
| 128 | [EXTCHK_HAPROXY_SERVER_CURCONN] = { "HAPROXY_SERVER_CURCONN", EXTCHK_SIZE_ULONG }, |
| 129 | }; |
| 130 | |
Simon Horman | 63a4a82 | 2012-03-19 07:24:41 +0900 | [diff] [blame] | 131 | static const struct analyze_status analyze_statuses[HANA_STATUS_SIZE] = { /* 0: ignore, 1: error, 2: OK */ |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 132 | [HANA_STATUS_UNKNOWN] = { "Unknown", { 0, 0 }}, |
| 133 | |
| 134 | [HANA_STATUS_L4_OK] = { "L4 successful connection", { 2, 0 }}, |
| 135 | [HANA_STATUS_L4_ERR] = { "L4 unsuccessful connection", { 1, 1 }}, |
| 136 | |
| 137 | [HANA_STATUS_HTTP_OK] = { "Correct http response", { 0, 2 }}, |
| 138 | [HANA_STATUS_HTTP_STS] = { "Wrong http response", { 0, 1 }}, |
| 139 | [HANA_STATUS_HTTP_HDRRSP] = { "Invalid http response (headers)", { 0, 1 }}, |
| 140 | [HANA_STATUS_HTTP_RSP] = { "Invalid http response", { 0, 1 }}, |
| 141 | |
| 142 | [HANA_STATUS_HTTP_READ_ERROR] = { "Read error (http)", { 0, 1 }}, |
| 143 | [HANA_STATUS_HTTP_READ_TIMEOUT] = { "Read timeout (http)", { 0, 1 }}, |
| 144 | [HANA_STATUS_HTTP_BROKEN_PIPE] = { "Close from server (http)", { 0, 1 }}, |
| 145 | }; |
| 146 | |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 147 | /* checks if <err> is a real error for errno or one that can be ignored, and |
| 148 | * return 0 for these ones or <err> for real ones. |
| 149 | */ |
| 150 | static inline int unclean_errno(int err) |
| 151 | { |
| 152 | if (err == EAGAIN || err == EINPROGRESS || |
| 153 | err == EISCONN || err == EALREADY) |
| 154 | return 0; |
| 155 | return err; |
| 156 | } |
| 157 | |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 158 | /* |
| 159 | * Convert check_status code to description |
| 160 | */ |
| 161 | const char *get_check_status_description(short check_status) { |
| 162 | |
| 163 | const char *desc; |
| 164 | |
| 165 | if (check_status < HCHK_STATUS_SIZE) |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 166 | desc = check_statuses[check_status].desc; |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 167 | else |
| 168 | desc = NULL; |
| 169 | |
| 170 | if (desc && *desc) |
| 171 | return desc; |
| 172 | else |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 173 | return check_statuses[HCHK_STATUS_UNKNOWN].desc; |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | /* |
| 177 | * Convert check_status code to short info |
| 178 | */ |
| 179 | const char *get_check_status_info(short check_status) { |
| 180 | |
| 181 | const char *info; |
| 182 | |
| 183 | if (check_status < HCHK_STATUS_SIZE) |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 184 | info = check_statuses[check_status].info; |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 185 | else |
| 186 | info = NULL; |
| 187 | |
| 188 | if (info && *info) |
| 189 | return info; |
| 190 | else |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 191 | return check_statuses[HCHK_STATUS_UNKNOWN].info; |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 192 | } |
| 193 | |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 194 | const char *get_analyze_status(short analyze_status) { |
| 195 | |
| 196 | const char *desc; |
| 197 | |
| 198 | if (analyze_status < HANA_STATUS_SIZE) |
| 199 | desc = analyze_statuses[analyze_status].desc; |
| 200 | else |
| 201 | desc = NULL; |
| 202 | |
| 203 | if (desc && *desc) |
| 204 | return desc; |
| 205 | else |
| 206 | return analyze_statuses[HANA_STATUS_UNKNOWN].desc; |
| 207 | } |
| 208 | |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 209 | /* |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 210 | * Set check->status, update check->duration and fill check->result with |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 211 | * an adequate CHK_RES_* value. The new check->health is computed based |
| 212 | * on the result. |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 213 | * |
| 214 | * Show information in logs about failed health check if server is UP |
| 215 | * or succeeded health checks if server is DOWN. |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 216 | */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 217 | static void set_server_check_status(struct check *check, short status, const char *desc) |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 218 | { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 219 | struct server *s = check->server; |
Willy Tarreau | bef1b32 | 2014-05-13 21:01:39 +0200 | [diff] [blame] | 220 | short prev_status = check->status; |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 221 | int report = 0; |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 222 | |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 223 | if (status == HCHK_STATUS_START) { |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 224 | check->result = CHK_RES_UNKNOWN; /* no result yet */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 225 | check->desc[0] = '\0'; |
| 226 | check->start = now; |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 227 | return; |
| 228 | } |
| 229 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 230 | if (!check->status) |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 231 | return; |
| 232 | |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 233 | if (desc && *desc) { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 234 | strncpy(check->desc, desc, HCHK_DESC_LEN-1); |
| 235 | check->desc[HCHK_DESC_LEN-1] = '\0'; |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 236 | } else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 237 | check->desc[0] = '\0'; |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 238 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 239 | check->status = status; |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 240 | if (check_statuses[status].result) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 241 | check->result = check_statuses[status].result; |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 242 | |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 243 | if (status == HCHK_STATUS_HANA) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 244 | check->duration = -1; |
| 245 | else if (!tv_iszero(&check->start)) { |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 246 | /* set_server_check_status() may be called more than once */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 247 | check->duration = tv_ms_elapsed(&check->start, &now); |
| 248 | tv_zero(&check->start); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 249 | } |
| 250 | |
Willy Tarreau | 2396418 | 2014-05-20 20:56:30 +0200 | [diff] [blame] | 251 | /* no change is expected if no state change occurred */ |
| 252 | if (check->result == CHK_RES_NEUTRAL) |
| 253 | return; |
| 254 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 255 | /* If the check was really just sending a mail, it won't have an |
| 256 | * associated server, so we're done now. |
| 257 | */ |
| 258 | if (!s) |
| 259 | return; |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 260 | report = 0; |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 261 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 262 | switch (check->result) { |
| 263 | case CHK_RES_FAILED: |
Willy Tarreau | 12634e1 | 2014-05-23 11:32:36 +0200 | [diff] [blame] | 264 | /* Failure to connect to the agent as a secondary check should not |
| 265 | * cause the server to be marked down. |
| 266 | */ |
| 267 | if ((!(check->state & CHK_ST_AGENT) || |
Simon Horman | eaabd52 | 2015-02-26 11:26:17 +0900 | [diff] [blame] | 268 | (check->status >= HCHK_STATUS_L57DATA)) && |
Christopher Faulet | b119a79 | 2018-05-02 12:12:45 +0200 | [diff] [blame] | 269 | (check->health > 0)) { |
Olivier Houchard | 7059c55 | 2019-03-08 18:49:32 +0100 | [diff] [blame] | 270 | _HA_ATOMIC_ADD(&s->counters.failed_checks, 1); |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 271 | report = 1; |
| 272 | check->health--; |
| 273 | if (check->health < check->rise) |
| 274 | check->health = 0; |
| 275 | } |
| 276 | break; |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 277 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 278 | case CHK_RES_PASSED: |
| 279 | case CHK_RES_CONDPASS: /* "condpass" cannot make the first step but it OK after a "passed" */ |
| 280 | if ((check->health < check->rise + check->fall - 1) && |
| 281 | (check->result == CHK_RES_PASSED || check->health > 0)) { |
| 282 | report = 1; |
| 283 | check->health++; |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 284 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 285 | if (check->health >= check->rise) |
| 286 | check->health = check->rise + check->fall - 1; /* OK now */ |
| 287 | } |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 288 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 289 | /* clear consecutive_errors if observing is enabled */ |
| 290 | if (s->onerror) |
| 291 | s->consecutive_errors = 0; |
| 292 | break; |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 293 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 294 | default: |
| 295 | break; |
| 296 | } |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 297 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 298 | if (s->proxy->options2 & PR_O2_LOGHCHKS && |
| 299 | (status != prev_status || report)) { |
| 300 | chunk_printf(&trash, |
Willy Tarreau | 12634e1 | 2014-05-23 11:32:36 +0200 | [diff] [blame] | 301 | "%s check for %sserver %s/%s %s%s", |
| 302 | (check->state & CHK_ST_AGENT) ? "Agent" : "Health", |
Willy Tarreau | c93cd16 | 2014-05-13 15:54:22 +0200 | [diff] [blame] | 303 | s->flags & SRV_F_BACKUP ? "backup " : "", |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 304 | s->proxy->id, s->id, |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 305 | (check->result == CHK_RES_CONDPASS) ? "conditionally ":"", |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 306 | (check->result >= CHK_RES_PASSED) ? "succeeded" : "failed"); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 307 | |
Emeric Brun | 5a13351 | 2017-10-19 14:42:30 +0200 | [diff] [blame] | 308 | srv_append_status(&trash, s, check, -1, 0); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 309 | |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 310 | chunk_appendf(&trash, ", status: %d/%d %s", |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 311 | (check->health >= check->rise) ? check->health - check->rise + 1 : check->health, |
| 312 | (check->health >= check->rise) ? check->fall : check->rise, |
| 313 | (check->health >= check->rise) ? (s->uweight ? "UP" : "DRAIN") : "DOWN"); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 314 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 315 | ha_warning("%s.\n", trash.area); |
| 316 | send_log(s->proxy, LOG_NOTICE, "%s.\n", trash.area); |
| 317 | send_email_alert(s, LOG_INFO, "%s", trash.area); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 318 | } |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 319 | } |
| 320 | |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 321 | /* Marks the check <check>'s server down if the current check is already failed |
| 322 | * and the server is not down yet nor in maintenance. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 323 | */ |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 324 | static void check_notify_failure(struct check *check) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 325 | { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 326 | struct server *s = check->server; |
Simon Horman | e0d1bfb | 2011-06-21 14:34:58 +0900 | [diff] [blame] | 327 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 328 | /* The agent secondary check should only cause a server to be marked |
| 329 | * as down if check->status is HCHK_STATUS_L7STS, which indicates |
| 330 | * that the agent returned "fail", "stopped" or "down". |
| 331 | * The implication here is that failure to connect to the agent |
| 332 | * as a secondary check should not cause the server to be marked |
| 333 | * down. */ |
| 334 | if ((check->state & CHK_ST_AGENT) && check->status != HCHK_STATUS_L7STS) |
| 335 | return; |
| 336 | |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 337 | if (check->health > 0) |
| 338 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 339 | |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 340 | /* We only report a reason for the check if we did not do so previously */ |
Emeric Brun | 5a13351 | 2017-10-19 14:42:30 +0200 | [diff] [blame] | 341 | srv_set_stopped(s, NULL, (!s->track && !(s->proxy->options2 & PR_O2_LOGHCHKS)) ? check : NULL); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 342 | } |
| 343 | |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 344 | /* Marks the check <check> as valid and tries to set its server up, provided |
Willy Tarreau | 3e04838 | 2014-05-21 10:30:54 +0200 | [diff] [blame] | 345 | * it isn't in maintenance, it is not tracking a down server and other checks |
| 346 | * comply. The rule is simple : by default, a server is up, unless any of the |
| 347 | * following conditions is true : |
| 348 | * - health check failed (check->health < rise) |
| 349 | * - agent check failed (agent->health < rise) |
| 350 | * - the server tracks a down server (track && track->state == STOPPED) |
| 351 | * Note that if the server has a slowstart, it will switch to STARTING instead |
| 352 | * of RUNNING. Also, only the health checks support the nolb mode, so the |
| 353 | * agent's success may not take the server out of this mode. |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 354 | */ |
Willy Tarreau | 3e04838 | 2014-05-21 10:30:54 +0200 | [diff] [blame] | 355 | static void check_notify_success(struct check *check) |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 356 | { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 357 | struct server *s = check->server; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 358 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 359 | if (s->next_admin & SRV_ADMF_MAINT) |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 360 | return; |
Cyril Bonté | cd19e51 | 2010-01-31 22:34:03 +0100 | [diff] [blame] | 361 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 362 | if (s->track && s->track->next_state == SRV_ST_STOPPED) |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 363 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 364 | |
Willy Tarreau | 3e04838 | 2014-05-21 10:30:54 +0200 | [diff] [blame] | 365 | if ((s->check.state & CHK_ST_ENABLED) && (s->check.health < s->check.rise)) |
| 366 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 367 | |
Willy Tarreau | 3e04838 | 2014-05-21 10:30:54 +0200 | [diff] [blame] | 368 | if ((s->agent.state & CHK_ST_ENABLED) && (s->agent.health < s->agent.rise)) |
| 369 | return; |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 370 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 371 | if ((check->state & CHK_ST_AGENT) && s->next_state == SRV_ST_STOPPING) |
Willy Tarreau | 3e04838 | 2014-05-21 10:30:54 +0200 | [diff] [blame] | 372 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 373 | |
Emeric Brun | 5a13351 | 2017-10-19 14:42:30 +0200 | [diff] [blame] | 374 | srv_set_running(s, NULL, (!s->track && !(s->proxy->options2 & PR_O2_LOGHCHKS)) ? check : NULL); |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 375 | } |
| 376 | |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 377 | /* Marks the check <check> as valid and tries to set its server into stopping mode |
| 378 | * if it was running or starting, and provided it isn't in maintenance and other |
| 379 | * checks comply. The conditions for the server to be marked in stopping mode are |
| 380 | * the same as for it to be turned up. Also, only the health checks support the |
| 381 | * nolb mode. |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 382 | */ |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 383 | static void check_notify_stopping(struct check *check) |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 384 | { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 385 | struct server *s = check->server; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 386 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 387 | if (s->next_admin & SRV_ADMF_MAINT) |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 388 | return; |
| 389 | |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 390 | if (check->state & CHK_ST_AGENT) |
| 391 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 392 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 393 | if (s->track && s->track->next_state == SRV_ST_STOPPED) |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 394 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 395 | |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 396 | if ((s->check.state & CHK_ST_ENABLED) && (s->check.health < s->check.rise)) |
| 397 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 398 | |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 399 | if ((s->agent.state & CHK_ST_ENABLED) && (s->agent.health < s->agent.rise)) |
| 400 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 401 | |
Willy Tarreau | b26881a | 2017-12-23 11:16:49 +0100 | [diff] [blame] | 402 | srv_set_stopping(s, NULL, (!s->track && !(s->proxy->options2 & PR_O2_LOGHCHKS)) ? check : NULL); |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 403 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 404 | |
Willy Tarreau | 9fe7aae | 2013-12-31 23:47:37 +0100 | [diff] [blame] | 405 | /* note: use health_adjust() only, which first checks that the observe mode is |
| 406 | * enabled. |
| 407 | */ |
| 408 | void __health_adjust(struct server *s, short status) |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 409 | { |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 410 | int failed; |
| 411 | int expire; |
| 412 | |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 413 | if (s->observe >= HANA_OBS_SIZE) |
| 414 | return; |
| 415 | |
Willy Tarreau | bb95666 | 2013-01-24 00:37:39 +0100 | [diff] [blame] | 416 | if (status >= HANA_STATUS_SIZE || !analyze_statuses[status].desc) |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 417 | return; |
| 418 | |
| 419 | switch (analyze_statuses[status].lr[s->observe - 1]) { |
| 420 | case 1: |
| 421 | failed = 1; |
| 422 | break; |
| 423 | |
| 424 | case 2: |
| 425 | failed = 0; |
| 426 | break; |
| 427 | |
| 428 | default: |
| 429 | return; |
| 430 | } |
| 431 | |
| 432 | if (!failed) { |
| 433 | /* good: clear consecutive_errors */ |
| 434 | s->consecutive_errors = 0; |
| 435 | return; |
| 436 | } |
| 437 | |
Olivier Houchard | 7059c55 | 2019-03-08 18:49:32 +0100 | [diff] [blame] | 438 | _HA_ATOMIC_ADD(&s->consecutive_errors, 1); |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 439 | |
| 440 | if (s->consecutive_errors < s->consecutive_errors_limit) |
| 441 | return; |
| 442 | |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 443 | chunk_printf(&trash, "Detected %d consecutive errors, last one was: %s", |
| 444 | s->consecutive_errors, get_analyze_status(status)); |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 445 | |
| 446 | switch (s->onerror) { |
| 447 | case HANA_ONERR_FASTINTER: |
| 448 | /* force fastinter - nothing to do here as all modes force it */ |
| 449 | break; |
| 450 | |
| 451 | case HANA_ONERR_SUDDTH: |
| 452 | /* simulate a pre-fatal failed health check */ |
Simon Horman | 58c3297 | 2013-11-25 10:46:38 +0900 | [diff] [blame] | 453 | if (s->check.health > s->check.rise) |
| 454 | s->check.health = s->check.rise + 1; |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 455 | |
| 456 | /* no break - fall through */ |
| 457 | |
| 458 | case HANA_ONERR_FAILCHK: |
| 459 | /* simulate a failed health check */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 460 | set_server_check_status(&s->check, HCHK_STATUS_HANA, |
| 461 | trash.area); |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 462 | check_notify_failure(&s->check); |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 463 | break; |
| 464 | |
| 465 | case HANA_ONERR_MARKDWN: |
| 466 | /* mark server down */ |
Simon Horman | 58c3297 | 2013-11-25 10:46:38 +0900 | [diff] [blame] | 467 | s->check.health = s->check.rise; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 468 | set_server_check_status(&s->check, HCHK_STATUS_HANA, |
| 469 | trash.area); |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 470 | check_notify_failure(&s->check); |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 471 | break; |
| 472 | |
| 473 | default: |
| 474 | /* write a warning? */ |
| 475 | break; |
| 476 | } |
| 477 | |
| 478 | s->consecutive_errors = 0; |
Olivier Houchard | 7059c55 | 2019-03-08 18:49:32 +0100 | [diff] [blame] | 479 | _HA_ATOMIC_ADD(&s->counters.failed_hana, 1); |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 480 | |
Simon Horman | 6618300 | 2013-02-23 10:16:43 +0900 | [diff] [blame] | 481 | if (s->check.fastinter) { |
| 482 | expire = tick_add(now_ms, MS_TO_TICKS(s->check.fastinter)); |
Sergiy Prykhodko | 1d57e50 | 2013-09-21 12:05:00 +0300 | [diff] [blame] | 483 | if (s->check.task->expire > expire) { |
Willy Tarreau | 5b3a202 | 2012-09-28 15:01:02 +0200 | [diff] [blame] | 484 | s->check.task->expire = expire; |
Sergiy Prykhodko | 1d57e50 | 2013-09-21 12:05:00 +0300 | [diff] [blame] | 485 | /* requeue check task with new expire */ |
| 486 | task_queue(s->check.task); |
| 487 | } |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 488 | } |
| 489 | } |
| 490 | |
Willy Tarreau | a1dab55 | 2014-04-14 15:04:54 +0200 | [diff] [blame] | 491 | static int httpchk_build_status_header(struct server *s, char *buffer, int size) |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 492 | { |
| 493 | int sv_state; |
| 494 | int ratio; |
| 495 | int hlen = 0; |
Joseph Lynch | 514061c | 2015-01-15 17:52:59 -0800 | [diff] [blame] | 496 | char addr[46]; |
| 497 | char port[6]; |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 498 | const char *srv_hlt_st[7] = { "DOWN", "DOWN %d/%d", |
| 499 | "UP %d/%d", "UP", |
| 500 | "NOLB %d/%d", "NOLB", |
| 501 | "no check" }; |
| 502 | |
| 503 | memcpy(buffer + hlen, "X-Haproxy-Server-State: ", 24); |
| 504 | hlen += 24; |
| 505 | |
Willy Tarreau | ff5ae35 | 2013-12-11 20:36:34 +0100 | [diff] [blame] | 506 | if (!(s->check.state & CHK_ST_ENABLED)) |
| 507 | sv_state = 6; |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 508 | else if (s->cur_state != SRV_ST_STOPPED) { |
Simon Horman | 58c3297 | 2013-11-25 10:46:38 +0900 | [diff] [blame] | 509 | if (s->check.health == s->check.rise + s->check.fall - 1) |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 510 | sv_state = 3; /* UP */ |
| 511 | else |
| 512 | sv_state = 2; /* going down */ |
| 513 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 514 | if (s->cur_state == SRV_ST_STOPPING) |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 515 | sv_state += 2; |
| 516 | } else { |
Simon Horman | 125d099 | 2013-02-24 17:23:38 +0900 | [diff] [blame] | 517 | if (s->check.health) |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 518 | sv_state = 1; /* going up */ |
| 519 | else |
| 520 | sv_state = 0; /* DOWN */ |
| 521 | } |
| 522 | |
Willy Tarreau | a1dab55 | 2014-04-14 15:04:54 +0200 | [diff] [blame] | 523 | hlen += snprintf(buffer + hlen, size - hlen, |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 524 | srv_hlt_st[sv_state], |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 525 | (s->cur_state != SRV_ST_STOPPED) ? (s->check.health - s->check.rise + 1) : (s->check.health), |
| 526 | (s->cur_state != SRV_ST_STOPPED) ? (s->check.fall) : (s->check.rise)); |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 527 | |
Joseph Lynch | 514061c | 2015-01-15 17:52:59 -0800 | [diff] [blame] | 528 | addr_to_str(&s->addr, addr, sizeof(addr)); |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 529 | if (s->addr.ss_family == AF_INET || s->addr.ss_family == AF_INET6) |
| 530 | snprintf(port, sizeof(port), "%u", s->svc_port); |
| 531 | else |
| 532 | *port = 0; |
Joseph Lynch | 514061c | 2015-01-15 17:52:59 -0800 | [diff] [blame] | 533 | |
| 534 | hlen += snprintf(buffer + hlen, size - hlen, "; address=%s; port=%s; name=%s/%s; node=%s; weight=%d/%d; scur=%d/%d; qcur=%d", |
| 535 | addr, port, s->proxy->id, s->id, |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 536 | global.node, |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 537 | (s->cur_eweight * s->proxy->lbprm.wmult + s->proxy->lbprm.wdiv - 1) / s->proxy->lbprm.wdiv, |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 538 | (s->proxy->lbprm.tot_weight * s->proxy->lbprm.wmult + s->proxy->lbprm.wdiv - 1) / s->proxy->lbprm.wdiv, |
| 539 | s->cur_sess, s->proxy->beconn - s->proxy->nbpend, |
| 540 | s->nbpend); |
| 541 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 542 | if ((s->cur_state == SRV_ST_STARTING) && |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 543 | now.tv_sec < s->last_change + s->slowstart && |
| 544 | now.tv_sec >= s->last_change) { |
| 545 | ratio = MAX(1, 100 * (now.tv_sec - s->last_change) / s->slowstart); |
Willy Tarreau | a1dab55 | 2014-04-14 15:04:54 +0200 | [diff] [blame] | 546 | hlen += snprintf(buffer + hlen, size - hlen, "; throttle=%d%%", ratio); |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | buffer[hlen++] = '\r'; |
| 550 | buffer[hlen++] = '\n'; |
| 551 | |
| 552 | return hlen; |
| 553 | } |
| 554 | |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 555 | /* Check the connection. If an error has already been reported or the socket is |
| 556 | * closed, keep errno intact as it is supposed to contain the valid error code. |
| 557 | * If no error is reported, check the socket's error queue using getsockopt(). |
| 558 | * Warning, this must be done only once when returning from poll, and never |
| 559 | * after an I/O error was attempted, otherwise the error queue might contain |
| 560 | * inconsistent errors. If an error is detected, the CO_FL_ERROR is set on the |
| 561 | * socket. Returns non-zero if an error was reported, zero if everything is |
| 562 | * clean (including a properly closed socket). |
| 563 | */ |
| 564 | static int retrieve_errno_from_socket(struct connection *conn) |
| 565 | { |
| 566 | int skerr; |
| 567 | socklen_t lskerr = sizeof(skerr); |
| 568 | |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 569 | if (conn->flags & CO_FL_ERROR && (unclean_errno(errno) || !conn->ctrl)) |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 570 | return 1; |
| 571 | |
Willy Tarreau | 3c72872 | 2014-01-23 13:50:42 +0100 | [diff] [blame] | 572 | if (!conn_ctrl_ready(conn)) |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 573 | return 0; |
| 574 | |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 575 | if (getsockopt(conn->handle.fd, SOL_SOCKET, SO_ERROR, &skerr, &lskerr) == 0) |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 576 | errno = skerr; |
| 577 | |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 578 | errno = unclean_errno(errno); |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 579 | |
| 580 | if (!errno) { |
| 581 | /* we could not retrieve an error, that does not mean there is |
| 582 | * none. Just don't change anything and only report the prior |
| 583 | * error if any. |
| 584 | */ |
| 585 | if (conn->flags & CO_FL_ERROR) |
| 586 | return 1; |
| 587 | else |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | conn->flags |= CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_SOCK_RD_SH; |
| 592 | return 1; |
| 593 | } |
| 594 | |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 595 | /* Try to collect as much information as possible on the connection status, |
| 596 | * and adjust the server status accordingly. It may make use of <errno_bck> |
| 597 | * if non-null when the caller is absolutely certain of its validity (eg: |
| 598 | * checked just after a syscall). If the caller doesn't have a valid errno, |
| 599 | * it can pass zero, and retrieve_errno_from_socket() will be called to try |
| 600 | * to extract errno from the socket. If no error is reported, it will consider |
| 601 | * the <expired> flag. This is intended to be used when a connection error was |
| 602 | * reported in conn->flags or when a timeout was reported in <expired>. The |
| 603 | * function takes care of not updating a server status which was already set. |
| 604 | * All situations where at least one of <expired> or CO_FL_ERROR are set |
| 605 | * produce a status. |
| 606 | */ |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 607 | static void chk_report_conn_err(struct check *check, int errno_bck, int expired) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 608 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 609 | struct conn_stream *cs = check->cs; |
| 610 | struct connection *conn = cs_conn(cs); |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 611 | const char *err_msg; |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 612 | struct buffer *chk; |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 613 | int step; |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 614 | char *comment; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 615 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 616 | if (check->result != CHK_RES_UNKNOWN) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 617 | return; |
| 618 | |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 619 | errno = unclean_errno(errno_bck); |
| 620 | if (conn && errno) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 621 | retrieve_errno_from_socket(conn); |
| 622 | |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 623 | if (conn && !(conn->flags & CO_FL_ERROR) && |
| 624 | !(cs->flags & CS_FL_ERROR) && !expired) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 625 | return; |
| 626 | |
| 627 | /* we'll try to build a meaningful error message depending on the |
| 628 | * context of the error possibly present in conn->err_code, and the |
| 629 | * socket error possibly collected above. This is useful to know the |
| 630 | * exact step of the L6 layer (eg: SSL handshake). |
| 631 | */ |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 632 | chk = get_trash_chunk(); |
| 633 | |
| 634 | if (check->type == PR_O2_TCPCHK_CHK) { |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 635 | step = tcpcheck_get_step_id(check, NULL); |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 636 | if (!step) |
| 637 | chunk_printf(chk, " at initial connection step of tcp-check"); |
| 638 | else { |
| 639 | chunk_printf(chk, " at step %d of tcp-check", step); |
| 640 | /* we were looking for a string */ |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 641 | if (check->current_step && check->current_step->action == TCPCHK_ACT_CONNECT) { |
| 642 | if (check->current_step->connect.port) |
| 643 | chunk_appendf(chk, " (connect port %d)" ,check->current_step->connect.port); |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 644 | else |
| 645 | chunk_appendf(chk, " (connect)"); |
| 646 | } |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 647 | else if (check->current_step && check->current_step->action == TCPCHK_ACT_EXPECT) { |
| 648 | struct tcpcheck_expect *expect = &check->current_step->expect; |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 649 | |
| 650 | switch (expect->type) { |
| 651 | case TCPCHK_EXPECT_STRING: |
| 652 | chunk_appendf(chk, " (expect string '%s')", expect->string); |
| 653 | break; |
| 654 | case TCPCHK_EXPECT_BINARY: |
| 655 | chunk_appendf(chk, " (expect binary '%s')", expect->string); |
| 656 | break; |
| 657 | case TCPCHK_EXPECT_REGEX: |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 658 | chunk_appendf(chk, " (expect regex)"); |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 659 | break; |
Gaetan Rivet | efab6c6 | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 660 | case TCPCHK_EXPECT_REGEX_BINARY: |
| 661 | chunk_appendf(chk, " (expect binary regex)"); |
| 662 | break; |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 663 | case TCPCHK_EXPECT_UNDEF: |
| 664 | chunk_appendf(chk, " (undefined expect!)"); |
| 665 | break; |
| 666 | } |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 667 | } |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 668 | else if (check->current_step && check->current_step->action == TCPCHK_ACT_SEND) { |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 669 | chunk_appendf(chk, " (send)"); |
| 670 | } |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 671 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 672 | comment = tcpcheck_get_step_comment(check, NULL); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 673 | if (comment) |
| 674 | chunk_appendf(chk, " comment: '%s'", comment); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 675 | } |
| 676 | } |
| 677 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 678 | if (conn && conn->err_code) { |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 679 | if (unclean_errno(errno)) |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 680 | chunk_printf(&trash, "%s (%s)%s", conn_err_code_str(conn), strerror(errno), |
| 681 | chk->area); |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 682 | else |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 683 | chunk_printf(&trash, "%s%s", conn_err_code_str(conn), |
| 684 | chk->area); |
| 685 | err_msg = trash.area; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 686 | } |
| 687 | else { |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 688 | if (unclean_errno(errno)) { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 689 | chunk_printf(&trash, "%s%s", strerror(errno), |
| 690 | chk->area); |
| 691 | err_msg = trash.area; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 692 | } |
| 693 | else { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 694 | err_msg = chk->area; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 695 | } |
| 696 | } |
| 697 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 698 | if (check->state & CHK_ST_PORT_MISS) { |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 699 | /* NOTE: this is reported after <fall> tries */ |
| 700 | chunk_printf(chk, "No port available for the TCP connection"); |
| 701 | set_server_check_status(check, HCHK_STATUS_SOCKERR, err_msg); |
| 702 | } |
| 703 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 704 | if (!conn) { |
| 705 | /* connection allocation error before the connection was established */ |
| 706 | set_server_check_status(check, HCHK_STATUS_SOCKERR, err_msg); |
| 707 | } |
Willy Tarreau | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 708 | else if (conn->flags & CO_FL_WAIT_L4_CONN) { |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 709 | /* L4 not established (yet) */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 710 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 711 | set_server_check_status(check, HCHK_STATUS_L4CON, err_msg); |
| 712 | else if (expired) |
| 713 | set_server_check_status(check, HCHK_STATUS_L4TOUT, err_msg); |
Baptiste Assmann | a68ca96 | 2015-04-14 01:15:08 +0200 | [diff] [blame] | 714 | |
| 715 | /* |
| 716 | * might be due to a server IP change. |
| 717 | * Let's trigger a DNS resolution if none are currently running. |
| 718 | */ |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 719 | if (check->server) |
| 720 | dns_trigger_resolution(check->server->dns_requester); |
Baptiste Assmann | a68ca96 | 2015-04-14 01:15:08 +0200 | [diff] [blame] | 721 | |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 722 | } |
Willy Tarreau | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 723 | else if (conn->flags & CO_FL_WAIT_L6_CONN) { |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 724 | /* L6 not established (yet) */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 725 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 726 | set_server_check_status(check, HCHK_STATUS_L6RSP, err_msg); |
| 727 | else if (expired) |
| 728 | set_server_check_status(check, HCHK_STATUS_L6TOUT, err_msg); |
| 729 | } |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 730 | else if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) { |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 731 | /* I/O error after connection was established and before we could diagnose */ |
| 732 | set_server_check_status(check, HCHK_STATUS_SOCKERR, err_msg); |
| 733 | } |
| 734 | else if (expired) { |
| 735 | /* connection established but expired check */ |
| 736 | if (check->type == PR_O2_SSL3_CHK) |
| 737 | set_server_check_status(check, HCHK_STATUS_L6TOUT, err_msg); |
| 738 | else /* HTTP, SMTP, ... */ |
| 739 | set_server_check_status(check, HCHK_STATUS_L7TOUT, err_msg); |
| 740 | } |
| 741 | |
| 742 | return; |
| 743 | } |
| 744 | |
Olivier Houchard | 5c110b9 | 2018-08-14 17:04:58 +0200 | [diff] [blame] | 745 | /* This function checks if any I/O is wanted, and if so, attempts to do so */ |
| 746 | static struct task *event_srv_chk_io(struct task *t, void *ctx, unsigned short state) |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 747 | { |
Olivier Houchard | 26e1a8f | 2018-09-12 15:15:12 +0200 | [diff] [blame] | 748 | struct check *check = ctx; |
| 749 | struct conn_stream *cs = check->cs; |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 750 | struct email_alertq *q = container_of(check, typeof(*q), check); |
Olivier Houchard | bc89ad8 | 2019-07-09 17:28:51 +0200 | [diff] [blame] | 751 | int ret = 0; |
Olivier Houchard | 4501c3e | 2018-08-28 19:36:18 +0200 | [diff] [blame] | 752 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 753 | if (!(check->wait_list.events & SUB_RETRY_SEND)) |
Olivier Houchard | bc89ad8 | 2019-07-09 17:28:51 +0200 | [diff] [blame] | 754 | ret = wake_srv_chk(cs); |
| 755 | if (ret == 0 && !(check->wait_list.events & SUB_RETRY_RECV)) { |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 756 | if (check->server) |
| 757 | HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock); |
| 758 | else |
| 759 | HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 760 | __event_srv_chk_r(cs); |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 761 | if (check->server) |
| 762 | HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock); |
| 763 | else |
| 764 | HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 765 | } |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 766 | return NULL; |
| 767 | } |
| 768 | |
| 769 | /* same as above but protected by the server lock. |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 770 | * |
| 771 | * Please do NOT place any return statement in this function and only leave |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 772 | * via the out label. NOTE THAT THIS FUNCTION DOESN'T LOCK, YOU PROBABLY WANT |
| 773 | * TO USE event_srv_chk_w() instead. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 774 | */ |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 775 | static void __event_srv_chk_w(struct conn_stream *cs) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 776 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 777 | struct connection *conn = cs->conn; |
| 778 | struct check *check = cs->data; |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 779 | struct server *s = check->server; |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 780 | struct task *t = check->task; |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 781 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 782 | if (unlikely(check->result == CHK_RES_FAILED)) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 783 | goto out_wakeup; |
| 784 | |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 785 | if (retrieve_errno_from_socket(conn)) { |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 786 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 787 | goto out_wakeup; |
| 788 | } |
Krzysztof Piotr Oledzki | 6492db5 | 2010-01-02 22:03:01 +0100 | [diff] [blame] | 789 | |
Willy Tarreau | 06559ac | 2013-12-05 01:53:08 +0100 | [diff] [blame] | 790 | /* here, we know that the connection is established. That's enough for |
| 791 | * a pure TCP check. |
| 792 | */ |
| 793 | if (!check->type) |
| 794 | goto out_wakeup; |
| 795 | |
Willy Tarreau | c09572f | 2017-10-04 11:58:22 +0200 | [diff] [blame] | 796 | /* wake() will take care of calling tcpcheck_main() */ |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 797 | if (check->type == PR_O2_TCPCHK_CHK) |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 798 | goto out; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 799 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 800 | if (b_data(&check->bo)) { |
Olivier Houchard | ed0f207 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 801 | cs->conn->mux->snd_buf(cs, &check->bo, b_data(&check->bo), 0); |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 802 | b_realign_if_empty(&check->bo); |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 803 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) { |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 804 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 805 | goto out_wakeup; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 806 | } |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 807 | if (b_data(&check->bo)) { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 808 | conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list); |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 809 | goto out; |
| 810 | } |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 811 | } |
Willy Tarreau | 6996e15 | 2007-04-30 14:37:43 +0200 | [diff] [blame] | 812 | |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 813 | /* full request sent, we allow up to <timeout.check> if nonzero for a response */ |
| 814 | if (s->proxy->timeout.check) { |
| 815 | t->expire = tick_add_ifset(now_ms, s->proxy->timeout.check); |
| 816 | task_queue(t); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 817 | } |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 818 | goto out; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 819 | |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 820 | out_wakeup: |
Willy Tarreau | fdccded | 2008-08-29 18:19:04 +0200 | [diff] [blame] | 821 | task_wakeup(t, TASK_WOKEN_IO); |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 822 | out: |
| 823 | return; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 824 | } |
| 825 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 826 | /* |
Willy Tarreau | f3c6920 | 2006-07-09 16:42:34 +0200 | [diff] [blame] | 827 | * This function is used only for server health-checks. It handles the server's |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 828 | * reply to an HTTP request, SSL HELLO or MySQL client Auth. It calls |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 829 | * set_server_check_status() to update check->status, check->duration |
| 830 | * and check->result. |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 831 | |
| 832 | * The set_server_check_status function is called with HCHK_STATUS_L7OKD if |
| 833 | * an HTTP server replies HTTP 2xx or 3xx (valid responses), if an SMTP server |
| 834 | * returns 2xx, HCHK_STATUS_L6OK if an SSL server returns at least 5 bytes in |
| 835 | * response to an SSL HELLO (the principle is that this is enough to |
| 836 | * distinguish between an SSL server and a pure TCP relay). All other cases will |
| 837 | * call it with a proper error status like HCHK_STATUS_L7STS, HCHK_STATUS_L6RSP, |
| 838 | * etc. |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 839 | * |
| 840 | * Please do NOT place any return statement in this function and only leave |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 841 | * via the out label. |
| 842 | * |
| 843 | * This must be called with the server lock held. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 844 | */ |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 845 | static void __event_srv_chk_r(struct conn_stream *cs) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 846 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 847 | struct connection *conn = cs->conn; |
| 848 | struct check *check = cs->data; |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 849 | struct server *s = check->server; |
| 850 | struct task *t = check->task; |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 851 | char *desc; |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 852 | int done; |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 853 | unsigned short msglen; |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 854 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 855 | if (unlikely(check->result == CHK_RES_FAILED)) |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 856 | goto out_wakeup; |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 857 | |
Willy Tarreau | c09572f | 2017-10-04 11:58:22 +0200 | [diff] [blame] | 858 | /* wake() will take care of calling tcpcheck_main() */ |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 859 | if (check->type == PR_O2_TCPCHK_CHK) |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 860 | goto out; |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 861 | |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 862 | /* Warning! Linux returns EAGAIN on SO_ERROR if data are still available |
| 863 | * but the connection was closed on the remote end. Fortunately, recv still |
| 864 | * works correctly and we don't need to do the getsockopt() on linux. |
| 865 | */ |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 866 | |
| 867 | /* Set buffer to point to the end of the data already read, and check |
| 868 | * that there is free space remaining. If the buffer is full, proceed |
| 869 | * with running the checks without attempting another socket read. |
| 870 | */ |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 871 | |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 872 | done = 0; |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 873 | |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 874 | cs->conn->mux->rcv_buf(cs, &check->bi, b_size(&check->bi), 0); |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 875 | if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) { |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 876 | done = 1; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 877 | if ((conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) && !b_data(&check->bi)) { |
Willy Tarreau | f150317 | 2012-09-28 19:39:36 +0200 | [diff] [blame] | 878 | /* Report network errors only if we got no other data. Otherwise |
| 879 | * we'll let the upper layers decide whether the response is OK |
| 880 | * or not. It is very common that an RST sent by the server is |
| 881 | * reported as an error just after the last data chunk. |
| 882 | */ |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 883 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | c1a0796 | 2010-03-16 20:55:43 +0100 | [diff] [blame] | 884 | goto out_wakeup; |
| 885 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 886 | } |
| 887 | |
Willy Tarreau | 0f0393f | 2019-09-24 10:43:03 +0200 | [diff] [blame] | 888 | /* the rest of the code below expects the connection to be ready! */ |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 889 | if (conn->flags & CO_FL_WAIT_XPRT && !done) |
Willy Tarreau | 0f0393f | 2019-09-24 10:43:03 +0200 | [diff] [blame] | 890 | goto wait_more_data; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 891 | |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 892 | /* Intermediate or complete response received. |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 893 | * Terminate string in b_head(&check->bi) buffer. |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 894 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 895 | if (b_data(&check->bi) < b_size(&check->bi)) |
| 896 | b_head(&check->bi)[b_data(&check->bi)] = '\0'; |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 897 | else { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 898 | b_head(&check->bi)[b_data(&check->bi) - 1] = '\0'; |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 899 | done = 1; /* buffer full, don't wait for more data */ |
| 900 | } |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 901 | |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 902 | /* Run the checks... */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 903 | switch (check->type) { |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 904 | case PR_O2_HTTP_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 905 | if (!done && b_data(&check->bi) < strlen("HTTP/1.0 000\r")) |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 906 | goto wait_more_data; |
| 907 | |
Willy Tarreau | c7dd71a | 2007-11-30 08:33:21 +0100 | [diff] [blame] | 908 | /* Check if the server speaks HTTP 1.X */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 909 | if ((b_data(&check->bi) < strlen("HTTP/1.0 000\r")) || |
| 910 | (memcmp(b_head(&check->bi), "HTTP/1.", 7) != 0 || |
| 911 | (*(b_head(&check->bi) + 12) != ' ' && *(b_head(&check->bi) + 12) != '\r')) || |
| 912 | !isdigit((unsigned char) *(b_head(&check->bi) + 9)) || !isdigit((unsigned char) *(b_head(&check->bi) + 10)) || |
| 913 | !isdigit((unsigned char) *(b_head(&check->bi) + 11))) { |
| 914 | cut_crlf(b_head(&check->bi)); |
| 915 | set_server_check_status(check, HCHK_STATUS_L7RSP, b_head(&check->bi)); |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 916 | |
Willy Tarreau | c7dd71a | 2007-11-30 08:33:21 +0100 | [diff] [blame] | 917 | goto out_wakeup; |
| 918 | } |
| 919 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 920 | check->code = str2uic(b_head(&check->bi) + 9); |
| 921 | desc = ltrim(b_head(&check->bi) + 12, ' '); |
Christopher Faulet | c2a89a6 | 2017-10-23 15:54:24 +0200 | [diff] [blame] | 922 | |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 923 | if ((s->proxy->options & PR_O_DISABLE404) && |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 924 | (s->next_state != SRV_ST_STOPPED) && (check->code == 404)) { |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 925 | /* 404 may be accepted as "stopping" only if the server was up */ |
| 926 | cut_crlf(desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 927 | set_server_check_status(check, HCHK_STATUS_L7OKCD, desc); |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 928 | } |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 929 | else if (s->proxy->options2 & PR_O2_EXP_TYPE) { |
| 930 | /* Run content verification check... We know we have at least 13 chars */ |
| 931 | if (!httpchk_expect(s, done)) |
| 932 | goto wait_more_data; |
| 933 | } |
| 934 | /* check the reply : HTTP/1.X 2xx and 3xx are OK */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 935 | else if (*(b_head(&check->bi) + 9) == '2' || *(b_head(&check->bi) + 9) == '3') { |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 936 | cut_crlf(desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 937 | set_server_check_status(check, HCHK_STATUS_L7OKD, desc); |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 938 | } |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 939 | else { |
| 940 | cut_crlf(desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 941 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 942 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 943 | break; |
| 944 | |
| 945 | case PR_O2_SSL3_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 946 | if (!done && b_data(&check->bi) < 5) |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 947 | goto wait_more_data; |
| 948 | |
Willy Tarreau | c7dd71a | 2007-11-30 08:33:21 +0100 | [diff] [blame] | 949 | /* Check for SSLv3 alert or handshake */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 950 | if ((b_data(&check->bi) >= 5) && (*b_head(&check->bi) == 0x15 || *b_head(&check->bi) == 0x16)) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 951 | set_server_check_status(check, HCHK_STATUS_L6OK, NULL); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 952 | else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 953 | set_server_check_status(check, HCHK_STATUS_L6RSP, NULL); |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 954 | break; |
| 955 | |
| 956 | case PR_O2_SMTP_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 957 | if (!done && b_data(&check->bi) < strlen("000\r")) |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 958 | goto wait_more_data; |
| 959 | |
Willy Tarreau | 5488a62 | 2019-08-06 16:26:31 +0200 | [diff] [blame] | 960 | /* do not reset when closing, servers don't like this */ |
| 961 | if (conn_ctrl_ready(cs->conn)) |
| 962 | fdtab[cs->conn->handle.fd].linger_risk = 0; |
| 963 | |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 964 | /* Check if the server speaks SMTP */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 965 | if ((b_data(&check->bi) < strlen("000\r")) || |
| 966 | (*(b_head(&check->bi) + 3) != ' ' && *(b_head(&check->bi) + 3) != '\r') || |
| 967 | !isdigit((unsigned char) *b_head(&check->bi)) || !isdigit((unsigned char) *(b_head(&check->bi) + 1)) || |
| 968 | !isdigit((unsigned char) *(b_head(&check->bi) + 2))) { |
| 969 | cut_crlf(b_head(&check->bi)); |
| 970 | set_server_check_status(check, HCHK_STATUS_L7RSP, b_head(&check->bi)); |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 971 | goto out_wakeup; |
| 972 | } |
| 973 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 974 | check->code = str2uic(b_head(&check->bi)); |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 975 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 976 | desc = ltrim(b_head(&check->bi) + 3, ' '); |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 977 | cut_crlf(desc); |
| 978 | |
Willy Tarreau | c7dd71a | 2007-11-30 08:33:21 +0100 | [diff] [blame] | 979 | /* Check for SMTP code 2xx (should be 250) */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 980 | if (*b_head(&check->bi) == '2') |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 981 | set_server_check_status(check, HCHK_STATUS_L7OKD, desc); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 982 | else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 983 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 984 | break; |
| 985 | |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 986 | case PR_O2_LB_AGENT_CHK: { |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 987 | int status = HCHK_STATUS_CHECKED; |
| 988 | const char *hs = NULL; /* health status */ |
| 989 | const char *as = NULL; /* admin status */ |
| 990 | const char *ps = NULL; /* performance status */ |
Nenad Merdanovic | 174dd37 | 2016-04-24 23:10:06 +0200 | [diff] [blame] | 991 | const char *cs = NULL; /* maxconn */ |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 992 | const char *err = NULL; /* first error to report */ |
| 993 | const char *wrn = NULL; /* first warning to report */ |
| 994 | char *cmd, *p; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 995 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 996 | /* We're getting an agent check response. The agent could |
| 997 | * have been disabled in the mean time with a long check |
| 998 | * still pending. It is important that we ignore the whole |
| 999 | * response. |
| 1000 | */ |
| 1001 | if (!(check->server->agent.state & CHK_ST_ENABLED)) |
| 1002 | break; |
| 1003 | |
| 1004 | /* The agent supports strings made of a single line ended by the |
| 1005 | * first CR ('\r') or LF ('\n'). This line is composed of words |
| 1006 | * delimited by spaces (' '), tabs ('\t'), or commas (','). The |
| 1007 | * line may optionally contained a description of a state change |
| 1008 | * after a sharp ('#'), which is only considered if a health state |
| 1009 | * is announced. |
| 1010 | * |
| 1011 | * Words may be composed of : |
| 1012 | * - a numeric weight suffixed by the percent character ('%'). |
| 1013 | * - a health status among "up", "down", "stopped", and "fail". |
| 1014 | * - an admin status among "ready", "drain", "maint". |
| 1015 | * |
| 1016 | * These words may appear in any order. If multiple words of the |
| 1017 | * same category appear, the last one wins. |
| 1018 | */ |
| 1019 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1020 | p = b_head(&check->bi); |
Willy Tarreau | 9809b78 | 2013-12-11 21:40:11 +0100 | [diff] [blame] | 1021 | while (*p && *p != '\n' && *p != '\r') |
| 1022 | p++; |
| 1023 | |
| 1024 | if (!*p) { |
| 1025 | if (!done) |
| 1026 | goto wait_more_data; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1027 | |
Willy Tarreau | 9809b78 | 2013-12-11 21:40:11 +0100 | [diff] [blame] | 1028 | /* at least inform the admin that the agent is mis-behaving */ |
| 1029 | set_server_check_status(check, check->status, "Ignoring incomplete line from agent"); |
| 1030 | break; |
| 1031 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1032 | |
Willy Tarreau | 9809b78 | 2013-12-11 21:40:11 +0100 | [diff] [blame] | 1033 | *p = 0; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1034 | cmd = b_head(&check->bi); |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1035 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1036 | while (*cmd) { |
| 1037 | /* look for next word */ |
| 1038 | if (*cmd == ' ' || *cmd == '\t' || *cmd == ',') { |
| 1039 | cmd++; |
| 1040 | continue; |
| 1041 | } |
Simon Horman | 671b6f0 | 2013-11-25 10:46:39 +0900 | [diff] [blame] | 1042 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1043 | if (*cmd == '#') { |
| 1044 | /* this is the beginning of a health status description, |
| 1045 | * skip the sharp and blanks. |
| 1046 | */ |
| 1047 | cmd++; |
| 1048 | while (*cmd == '\t' || *cmd == ' ') |
| 1049 | cmd++; |
Simon Horman | 671b6f0 | 2013-11-25 10:46:39 +0900 | [diff] [blame] | 1050 | break; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1051 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1052 | |
| 1053 | /* find the end of the word so that we have a null-terminated |
| 1054 | * word between <cmd> and <p>. |
| 1055 | */ |
| 1056 | p = cmd + 1; |
| 1057 | while (*p && *p != '\t' && *p != ' ' && *p != '\n' && *p != ',') |
| 1058 | p++; |
| 1059 | if (*p) |
| 1060 | *p++ = 0; |
| 1061 | |
| 1062 | /* first, health statuses */ |
| 1063 | if (strcasecmp(cmd, "up") == 0) { |
| 1064 | check->health = check->rise + check->fall - 1; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1065 | status = HCHK_STATUS_L7OKD; |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1066 | hs = cmd; |
| 1067 | } |
| 1068 | else if (strcasecmp(cmd, "down") == 0) { |
| 1069 | check->health = 0; |
| 1070 | status = HCHK_STATUS_L7STS; |
| 1071 | hs = cmd; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1072 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1073 | else if (strcasecmp(cmd, "stopped") == 0) { |
| 1074 | check->health = 0; |
| 1075 | status = HCHK_STATUS_L7STS; |
| 1076 | hs = cmd; |
| 1077 | } |
| 1078 | else if (strcasecmp(cmd, "fail") == 0) { |
| 1079 | check->health = 0; |
| 1080 | status = HCHK_STATUS_L7STS; |
| 1081 | hs = cmd; |
| 1082 | } |
| 1083 | /* admin statuses */ |
| 1084 | else if (strcasecmp(cmd, "ready") == 0) { |
| 1085 | as = cmd; |
| 1086 | } |
| 1087 | else if (strcasecmp(cmd, "drain") == 0) { |
| 1088 | as = cmd; |
| 1089 | } |
| 1090 | else if (strcasecmp(cmd, "maint") == 0) { |
| 1091 | as = cmd; |
| 1092 | } |
Nenad Merdanovic | 174dd37 | 2016-04-24 23:10:06 +0200 | [diff] [blame] | 1093 | /* try to parse a weight here and keep the last one */ |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1094 | else if (isdigit((unsigned char)*cmd) && strchr(cmd, '%') != NULL) { |
| 1095 | ps = cmd; |
| 1096 | } |
Nenad Merdanovic | 174dd37 | 2016-04-24 23:10:06 +0200 | [diff] [blame] | 1097 | /* try to parse a maxconn here */ |
| 1098 | else if (strncasecmp(cmd, "maxconn:", strlen("maxconn:")) == 0) { |
| 1099 | cs = cmd; |
| 1100 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1101 | else { |
| 1102 | /* keep a copy of the first error */ |
| 1103 | if (!err) |
| 1104 | err = cmd; |
| 1105 | } |
| 1106 | /* skip to next word */ |
| 1107 | cmd = p; |
| 1108 | } |
| 1109 | /* here, cmd points either to \0 or to the beginning of a |
| 1110 | * description. Skip possible leading spaces. |
| 1111 | */ |
| 1112 | while (*cmd == ' ' || *cmd == '\n') |
| 1113 | cmd++; |
| 1114 | |
| 1115 | /* First, update the admin status so that we avoid sending other |
| 1116 | * possibly useless warnings and can also update the health if |
| 1117 | * present after going back up. |
| 1118 | */ |
| 1119 | if (as) { |
| 1120 | if (strcasecmp(as, "drain") == 0) |
| 1121 | srv_adm_set_drain(check->server); |
| 1122 | else if (strcasecmp(as, "maint") == 0) |
| 1123 | srv_adm_set_maint(check->server); |
| 1124 | else |
| 1125 | srv_adm_set_ready(check->server); |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1126 | } |
| 1127 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1128 | /* now change weights */ |
| 1129 | if (ps) { |
| 1130 | const char *msg; |
| 1131 | |
| 1132 | msg = server_parse_weight_change_request(s, ps); |
| 1133 | if (!wrn || !*wrn) |
| 1134 | wrn = msg; |
| 1135 | } |
| 1136 | |
Nenad Merdanovic | 174dd37 | 2016-04-24 23:10:06 +0200 | [diff] [blame] | 1137 | if (cs) { |
| 1138 | const char *msg; |
| 1139 | |
| 1140 | cs += strlen("maxconn:"); |
| 1141 | |
| 1142 | msg = server_parse_maxconn_change_request(s, cs); |
| 1143 | if (!wrn || !*wrn) |
| 1144 | wrn = msg; |
| 1145 | } |
| 1146 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1147 | /* and finally health status */ |
| 1148 | if (hs) { |
| 1149 | /* We'll report some of the warnings and errors we have |
| 1150 | * here. Down reports are critical, we leave them untouched. |
| 1151 | * Lack of report, or report of 'UP' leaves the room for |
| 1152 | * ERR first, then WARN. |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1153 | */ |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1154 | const char *msg = cmd; |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 1155 | struct buffer *t; |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1156 | |
| 1157 | if (!*msg || status == HCHK_STATUS_L7OKD) { |
| 1158 | if (err && *err) |
| 1159 | msg = err; |
| 1160 | else if (wrn && *wrn) |
| 1161 | msg = wrn; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1162 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1163 | |
| 1164 | t = get_trash_chunk(); |
| 1165 | chunk_printf(t, "via agent : %s%s%s%s", |
| 1166 | hs, *msg ? " (" : "", |
| 1167 | msg, *msg ? ")" : ""); |
| 1168 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1169 | set_server_check_status(check, status, t->area); |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1170 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1171 | else if (err && *err) { |
| 1172 | /* No status change but we'd like to report something odd. |
| 1173 | * Just report the current state and copy the message. |
| 1174 | */ |
| 1175 | chunk_printf(&trash, "agent reports an error : %s", err); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1176 | set_server_check_status(check, status/*check->status*/, |
| 1177 | trash.area); |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1178 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1179 | } |
| 1180 | else if (wrn && *wrn) { |
| 1181 | /* No status change but we'd like to report something odd. |
| 1182 | * Just report the current state and copy the message. |
| 1183 | */ |
| 1184 | chunk_printf(&trash, "agent warns : %s", wrn); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1185 | set_server_check_status(check, status/*check->status*/, |
| 1186 | trash.area); |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1187 | } |
| 1188 | else |
| 1189 | set_server_check_status(check, status, NULL); |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1190 | break; |
| 1191 | } |
| 1192 | |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1193 | case PR_O2_PGSQL_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1194 | if (!done && b_data(&check->bi) < 9) |
Rauf Kuliyev | 38b4156 | 2011-01-04 15:14:13 +0100 | [diff] [blame] | 1195 | goto wait_more_data; |
| 1196 | |
Willy Tarreau | 5488a62 | 2019-08-06 16:26:31 +0200 | [diff] [blame] | 1197 | /* do not reset when closing, servers don't like this */ |
| 1198 | if (conn_ctrl_ready(cs->conn)) |
| 1199 | fdtab[cs->conn->handle.fd].linger_risk = 0; |
| 1200 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1201 | if (b_head(&check->bi)[0] == 'R') { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1202 | set_server_check_status(check, HCHK_STATUS_L7OKD, "PostgreSQL server is ok"); |
Rauf Kuliyev | 38b4156 | 2011-01-04 15:14:13 +0100 | [diff] [blame] | 1203 | } |
| 1204 | else { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1205 | if ((b_head(&check->bi)[0] == 'E') && (b_head(&check->bi)[5]!=0) && (b_head(&check->bi)[6]!=0)) |
| 1206 | desc = &b_head(&check->bi)[6]; |
Rauf Kuliyev | 38b4156 | 2011-01-04 15:14:13 +0100 | [diff] [blame] | 1207 | else |
| 1208 | desc = "PostgreSQL unknown error"; |
| 1209 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1210 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Rauf Kuliyev | 38b4156 | 2011-01-04 15:14:13 +0100 | [diff] [blame] | 1211 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1212 | break; |
| 1213 | |
| 1214 | case PR_O2_REDIS_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1215 | if (!done && b_data(&check->bi) < 7) |
Hervé COMMOWICK | ec032d6 | 2011-08-05 16:23:48 +0200 | [diff] [blame] | 1216 | goto wait_more_data; |
| 1217 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1218 | if (strcmp(b_head(&check->bi), "+PONG\r\n") == 0) { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1219 | set_server_check_status(check, HCHK_STATUS_L7OKD, "Redis server is ok"); |
Hervé COMMOWICK | ec032d6 | 2011-08-05 16:23:48 +0200 | [diff] [blame] | 1220 | } |
| 1221 | else { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1222 | set_server_check_status(check, HCHK_STATUS_L7STS, b_head(&check->bi)); |
Hervé COMMOWICK | ec032d6 | 2011-08-05 16:23:48 +0200 | [diff] [blame] | 1223 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1224 | break; |
| 1225 | |
| 1226 | case PR_O2_MYSQL_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1227 | if (!done && b_data(&check->bi) < 5) |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 1228 | goto wait_more_data; |
| 1229 | |
Willy Tarreau | 5488a62 | 2019-08-06 16:26:31 +0200 | [diff] [blame] | 1230 | /* do not reset when closing, servers don't like this */ |
| 1231 | if (conn_ctrl_ready(cs->conn)) |
| 1232 | fdtab[cs->conn->handle.fd].linger_risk = 0; |
| 1233 | |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1234 | if (s->proxy->check_len == 0) { // old mode |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1235 | if (*(b_head(&check->bi) + 4) != '\xff') { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1236 | /* We set the MySQL Version in description for information purpose |
| 1237 | * FIXME : it can be cool to use MySQL Version for other purpose, |
| 1238 | * like mark as down old MySQL server. |
| 1239 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1240 | if (b_data(&check->bi) > 51) { |
| 1241 | desc = ltrim(b_head(&check->bi) + 5, ' '); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1242 | set_server_check_status(check, HCHK_STATUS_L7OKD, desc); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1243 | } |
| 1244 | else { |
| 1245 | if (!done) |
| 1246 | goto wait_more_data; |
Emeric Brun | 9f0b458 | 2017-10-23 14:39:51 +0200 | [diff] [blame] | 1247 | |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1248 | /* it seems we have a OK packet but without a valid length, |
| 1249 | * it must be a protocol error |
| 1250 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1251 | set_server_check_status(check, HCHK_STATUS_L7RSP, b_head(&check->bi)); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1252 | } |
Hervé COMMOWICK | 698ae00 | 2010-01-12 09:25:13 +0100 | [diff] [blame] | 1253 | } |
| 1254 | else { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1255 | /* An error message is attached in the Error packet */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1256 | desc = ltrim(b_head(&check->bi) + 7, ' '); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1257 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1258 | } |
| 1259 | } else { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1260 | unsigned int first_packet_len = ((unsigned int) *b_head(&check->bi)) + |
| 1261 | (((unsigned int) *(b_head(&check->bi) + 1)) << 8) + |
| 1262 | (((unsigned int) *(b_head(&check->bi) + 2)) << 16); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1263 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1264 | if (b_data(&check->bi) == first_packet_len + 4) { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1265 | /* MySQL Error packet always begin with field_count = 0xff */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1266 | if (*(b_head(&check->bi) + 4) != '\xff') { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1267 | /* We have only one MySQL packet and it is a Handshake Initialization packet |
| 1268 | * but we need to have a second packet to know if it is alright |
| 1269 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1270 | if (!done && b_data(&check->bi) < first_packet_len + 5) |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1271 | goto wait_more_data; |
| 1272 | } |
| 1273 | else { |
| 1274 | /* We have only one packet and it is an Error packet, |
| 1275 | * an error message is attached, so we can display it |
| 1276 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1277 | desc = &b_head(&check->bi)[7]; |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1278 | //ha_warning("onlyoneERR: %s\n", desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1279 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1280 | } |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1281 | } else if (b_data(&check->bi) > first_packet_len + 4) { |
| 1282 | unsigned int second_packet_len = ((unsigned int) *(b_head(&check->bi) + first_packet_len + 4)) + |
| 1283 | (((unsigned int) *(b_head(&check->bi) + first_packet_len + 5)) << 8) + |
| 1284 | (((unsigned int) *(b_head(&check->bi) + first_packet_len + 6)) << 16); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1285 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1286 | if (b_data(&check->bi) == first_packet_len + 4 + second_packet_len + 4 ) { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1287 | /* We have 2 packets and that's good */ |
| 1288 | /* Check if the second packet is a MySQL Error packet or not */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1289 | if (*(b_head(&check->bi) + first_packet_len + 8) != '\xff') { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1290 | /* No error packet */ |
| 1291 | /* We set the MySQL Version in description for information purpose */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1292 | desc = &b_head(&check->bi)[5]; |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1293 | //ha_warning("2packetOK: %s\n", desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1294 | set_server_check_status(check, HCHK_STATUS_L7OKD, desc); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1295 | } |
| 1296 | else { |
| 1297 | /* An error message is attached in the Error packet |
| 1298 | * so we can display it ! :) |
| 1299 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1300 | desc = &b_head(&check->bi)[first_packet_len+11]; |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1301 | //ha_warning("2packetERR: %s\n", desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1302 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1303 | } |
| 1304 | } |
| 1305 | } |
| 1306 | else { |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 1307 | if (!done) |
| 1308 | goto wait_more_data; |
Emeric Brun | 9f0b458 | 2017-10-23 14:39:51 +0200 | [diff] [blame] | 1309 | |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1310 | /* it seems we have a Handshake Initialization packet but without a valid length, |
Hervé COMMOWICK | 698ae00 | 2010-01-12 09:25:13 +0100 | [diff] [blame] | 1311 | * it must be a protocol error |
| 1312 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1313 | desc = &b_head(&check->bi)[5]; |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1314 | //ha_warning("protoerr: %s\n", desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1315 | set_server_check_status(check, HCHK_STATUS_L7RSP, desc); |
Hervé COMMOWICK | 698ae00 | 2010-01-12 09:25:13 +0100 | [diff] [blame] | 1316 | } |
| 1317 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1318 | break; |
| 1319 | |
| 1320 | case PR_O2_LDAP_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1321 | if (!done && b_data(&check->bi) < 14) |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1322 | goto wait_more_data; |
| 1323 | |
| 1324 | /* Check if the server speaks LDAP (ASN.1/BER) |
| 1325 | * http://en.wikipedia.org/wiki/Basic_Encoding_Rules |
| 1326 | * http://tools.ietf.org/html/rfc4511 |
| 1327 | */ |
| 1328 | |
| 1329 | /* http://tools.ietf.org/html/rfc4511#section-4.1.1 |
| 1330 | * LDAPMessage: 0x30: SEQUENCE |
| 1331 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1332 | if ((b_data(&check->bi) < 14) || (*(b_head(&check->bi)) != '\x30')) { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1333 | set_server_check_status(check, HCHK_STATUS_L7RSP, "Not LDAPv3 protocol"); |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1334 | } |
| 1335 | else { |
| 1336 | /* size of LDAPMessage */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1337 | msglen = (*(b_head(&check->bi) + 1) & 0x80) ? (*(b_head(&check->bi) + 1) & 0x7f) : 0; |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1338 | |
| 1339 | /* http://tools.ietf.org/html/rfc4511#section-4.2.2 |
| 1340 | * messageID: 0x02 0x01 0x01: INTEGER 1 |
| 1341 | * protocolOp: 0x61: bindResponse |
| 1342 | */ |
| 1343 | if ((msglen > 2) || |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1344 | (memcmp(b_head(&check->bi) + 2 + msglen, "\x02\x01\x01\x61", 4) != 0)) { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1345 | set_server_check_status(check, HCHK_STATUS_L7RSP, "Not LDAPv3 protocol"); |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1346 | goto out_wakeup; |
| 1347 | } |
| 1348 | |
| 1349 | /* size of bindResponse */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1350 | msglen += (*(b_head(&check->bi) + msglen + 6) & 0x80) ? (*(b_head(&check->bi) + msglen + 6) & 0x7f) : 0; |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1351 | |
| 1352 | /* http://tools.ietf.org/html/rfc4511#section-4.1.9 |
| 1353 | * ldapResult: 0x0a 0x01: ENUMERATION |
| 1354 | */ |
| 1355 | if ((msglen > 4) || |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1356 | (memcmp(b_head(&check->bi) + 7 + msglen, "\x0a\x01", 2) != 0)) { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1357 | set_server_check_status(check, HCHK_STATUS_L7RSP, "Not LDAPv3 protocol"); |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1358 | goto out_wakeup; |
| 1359 | } |
| 1360 | |
| 1361 | /* http://tools.ietf.org/html/rfc4511#section-4.1.9 |
| 1362 | * resultCode |
| 1363 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1364 | check->code = *(b_head(&check->bi) + msglen + 9); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1365 | if (check->code) { |
| 1366 | set_server_check_status(check, HCHK_STATUS_L7STS, "See RFC: http://tools.ietf.org/html/rfc4511#section-4.1.9"); |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1367 | } else { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1368 | set_server_check_status(check, HCHK_STATUS_L7OKD, "Success"); |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1369 | } |
| 1370 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1371 | break; |
| 1372 | |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 1373 | case PR_O2_SPOP_CHK: { |
| 1374 | unsigned int framesz; |
| 1375 | char err[HCHK_DESC_LEN]; |
| 1376 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1377 | if (!done && b_data(&check->bi) < 4) |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 1378 | goto wait_more_data; |
| 1379 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1380 | memcpy(&framesz, b_head(&check->bi), 4); |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 1381 | framesz = ntohl(framesz); |
| 1382 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1383 | if (!done && b_data(&check->bi) < (4+framesz)) |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 1384 | goto wait_more_data; |
| 1385 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1386 | if (!spoe_handle_healthcheck_response(b_head(&check->bi)+4, framesz, err, HCHK_DESC_LEN-1)) |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 1387 | set_server_check_status(check, HCHK_STATUS_L7OKD, "SPOA server is ok"); |
| 1388 | else |
| 1389 | set_server_check_status(check, HCHK_STATUS_L7STS, err); |
| 1390 | break; |
| 1391 | } |
| 1392 | |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1393 | default: |
Willy Tarreau | 4c1a2b3 | 2019-09-05 18:43:22 +0200 | [diff] [blame] | 1394 | /* good connection is enough for pure TCP check */ |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 1395 | if (!(conn->flags & CO_FL_WAIT_XPRT) && !check->type) { |
Christopher Faulet | f61f33a | 2020-03-27 18:55:49 +0100 | [diff] [blame] | 1396 | if (check->use_ssl == 1) |
Willy Tarreau | 4c1a2b3 | 2019-09-05 18:43:22 +0200 | [diff] [blame] | 1397 | set_server_check_status(check, HCHK_STATUS_L6OK, NULL); |
| 1398 | else |
| 1399 | set_server_check_status(check, HCHK_STATUS_L4OK, NULL); |
| 1400 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1401 | break; |
| 1402 | } /* switch */ |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 1403 | |
Willy Tarreau | c7dd71a | 2007-11-30 08:33:21 +0100 | [diff] [blame] | 1404 | out_wakeup: |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 1405 | /* collect possible new errors */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1406 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 1407 | chk_report_conn_err(check, 0, 0); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1408 | |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 1409 | /* Reset the check buffer... */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1410 | *b_head(&check->bi) = '\0'; |
| 1411 | b_reset(&check->bi); |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 1412 | |
Steven Davidovitz | 544d481 | 2017-03-08 11:06:20 -0800 | [diff] [blame] | 1413 | /* Close the connection... We still attempt to nicely close if, |
| 1414 | * for instance, SSL needs to send a "close notify." Later, we perform |
| 1415 | * a hard close and reset the connection if some data are pending, |
| 1416 | * otherwise we end up with many TIME_WAITs and eat all the source port |
| 1417 | * range quickly. To avoid sending RSTs all the time, we first try to |
| 1418 | * drain pending data. |
Willy Tarreau | fd29cc5 | 2012-11-23 09:18:20 +0100 | [diff] [blame] | 1419 | */ |
Olivier Houchard | 6c7e96a | 2019-07-02 16:35:18 +0200 | [diff] [blame] | 1420 | /* Call cs_shutr() first, to add the CO_FL_SOCK_RD_SH flag on the |
| 1421 | * connection, to make sure cs_shutw() will not lead to a shutdown() |
| 1422 | * that would provoke TIME_WAITs. |
| 1423 | */ |
| 1424 | cs_shutr(cs, CS_SHR_DRAIN); |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 1425 | cs_shutw(cs, CS_SHW_NORMAL); |
Willy Tarreau | 2b57cb8 | 2013-06-10 19:56:38 +0200 | [diff] [blame] | 1426 | |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 1427 | /* OK, let's not stay here forever */ |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 1428 | if (check->result == CHK_RES_FAILED) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 1429 | conn->flags |= CO_FL_ERROR; |
| 1430 | |
Willy Tarreau | fdccded | 2008-08-29 18:19:04 +0200 | [diff] [blame] | 1431 | task_wakeup(t, TASK_WOKEN_IO); |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 1432 | out: |
Willy Tarreau | 3267d36 | 2012-08-17 23:53:56 +0200 | [diff] [blame] | 1433 | return; |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 1434 | |
| 1435 | wait_more_data: |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 1436 | cs->conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list); |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 1437 | goto out; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1438 | } |
| 1439 | |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 1440 | /* |
| 1441 | * This function is used only for server health-checks. It handles connection |
| 1442 | * status updates including errors. If necessary, it wakes the check task up. |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1443 | * It returns 0 on normal cases, <0 if at least one close() has happened on the |
| 1444 | * connection (eg: reconnect). |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 1445 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1446 | static int wake_srv_chk(struct conn_stream *cs) |
Willy Tarreau | 20bea42 | 2012-07-06 12:00:49 +0200 | [diff] [blame] | 1447 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1448 | struct connection *conn = cs->conn; |
| 1449 | struct check *check = cs->data; |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 1450 | struct email_alertq *q = container_of(check, typeof(*q), check); |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1451 | int ret = 0; |
Willy Tarreau | 20bea42 | 2012-07-06 12:00:49 +0200 | [diff] [blame] | 1452 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 1453 | if (check->server) |
| 1454 | HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock); |
| 1455 | else |
| 1456 | HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Emeric Brun | f6ba17d | 2017-11-02 14:35:27 +0100 | [diff] [blame] | 1457 | |
Willy Tarreau | c09572f | 2017-10-04 11:58:22 +0200 | [diff] [blame] | 1458 | /* we may have to make progress on the TCP checks */ |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1459 | if (check->type == PR_O2_TCPCHK_CHK) { |
| 1460 | ret = tcpcheck_main(check); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1461 | cs = check->cs; |
Willy Tarreau | 543abd4 | 2018-09-20 11:25:12 +0200 | [diff] [blame] | 1462 | conn = cs->conn; |
Willy Tarreau | c594039 | 2019-09-05 17:38:40 +0200 | [diff] [blame] | 1463 | } else { |
| 1464 | if (!(check->wait_list.events & SUB_RETRY_SEND)) |
| 1465 | __event_srv_chk_w(cs); |
| 1466 | if (!(check->wait_list.events & SUB_RETRY_RECV)) |
| 1467 | __event_srv_chk_r(cs); |
| 1468 | } |
Willy Tarreau | c09572f | 2017-10-04 11:58:22 +0200 | [diff] [blame] | 1469 | |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1470 | if (unlikely(conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)) { |
Willy Tarreau | 02b0f58 | 2013-12-03 15:42:33 +0100 | [diff] [blame] | 1471 | /* We may get error reports bypassing the I/O handlers, typically |
| 1472 | * the case when sending a pure TCP check which fails, then the I/O |
| 1473 | * handlers above are not called. This is completely handled by the |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 1474 | * main processing task so let's simply wake it up. If we get here, |
| 1475 | * we expect errno to still be valid. |
| 1476 | */ |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 1477 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | 2d351b6 | 2013-12-05 02:36:25 +0100 | [diff] [blame] | 1478 | task_wakeup(check->task, TASK_WOKEN_IO); |
| 1479 | } |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 1480 | else if (!(conn->flags & CO_FL_WAIT_XPRT) && !check->type) { |
Willy Tarreau | 3be293f | 2014-02-05 18:31:24 +0100 | [diff] [blame] | 1481 | /* we may get here if only a connection probe was required : we |
| 1482 | * don't have any data to send nor anything expected in response, |
| 1483 | * so the completion of the connection establishment is enough. |
| 1484 | */ |
| 1485 | task_wakeup(check->task, TASK_WOKEN_IO); |
| 1486 | } |
Willy Tarreau | 2d351b6 | 2013-12-05 02:36:25 +0100 | [diff] [blame] | 1487 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 1488 | if (check->result != CHK_RES_UNKNOWN) { |
Christopher Faulet | 774c486 | 2019-01-21 14:15:50 +0100 | [diff] [blame] | 1489 | /* Check complete or aborted. If connection not yet closed do it |
| 1490 | * now and wake the check task up to be sure the result is |
| 1491 | * handled ASAP. */ |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 1492 | conn_sock_drain(conn); |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 1493 | cs_close(cs); |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1494 | ret = -1; |
Olivier Houchard | f494957 | 2019-07-02 17:42:22 +0200 | [diff] [blame] | 1495 | /* We may have been scheduled to run, and the |
| 1496 | * I/O handler expects to have a cs, so remove |
| 1497 | * the tasklet |
| 1498 | */ |
| 1499 | tasklet_remove_from_tasklet_list(check->wait_list.tasklet); |
Christopher Faulet | 774c486 | 2019-01-21 14:15:50 +0100 | [diff] [blame] | 1500 | task_wakeup(check->task, TASK_WOKEN_IO); |
Willy Tarreau | 2d351b6 | 2013-12-05 02:36:25 +0100 | [diff] [blame] | 1501 | } |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1502 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 1503 | if (check->server) |
| 1504 | HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock); |
| 1505 | else |
| 1506 | HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Emeric Brun | f6ba17d | 2017-11-02 14:35:27 +0100 | [diff] [blame] | 1507 | |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1508 | /* if a connection got replaced, we must absolutely prevent the connection |
| 1509 | * handler from touching its fd, and perform the FD polling updates ourselves |
| 1510 | */ |
| 1511 | if (ret < 0) |
| 1512 | conn_cond_update_polling(conn); |
| 1513 | |
| 1514 | return ret; |
Willy Tarreau | 20bea42 | 2012-07-06 12:00:49 +0200 | [diff] [blame] | 1515 | } |
| 1516 | |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 1517 | struct data_cb check_conn_cb = { |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 1518 | .wake = wake_srv_chk, |
Willy Tarreau | 8e0bb0a | 2016-11-24 16:58:12 +0100 | [diff] [blame] | 1519 | .name = "CHCK", |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 1520 | }; |
| 1521 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1522 | /* |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1523 | * updates the server's weight during a warmup stage. Once the final weight is |
| 1524 | * reached, the task automatically stops. Note that any server status change |
| 1525 | * must have updated s->last_change accordingly. |
| 1526 | */ |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 1527 | static struct task *server_warmup(struct task *t, void *context, unsigned short state) |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1528 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 1529 | struct server *s = context; |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1530 | |
| 1531 | /* by default, plan on stopping the task */ |
| 1532 | t->expire = TICK_ETERNITY; |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 1533 | if ((s->next_admin & SRV_ADMF_MAINT) || |
| 1534 | (s->next_state != SRV_ST_STARTING)) |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1535 | return t; |
| 1536 | |
Willy Tarreau | 4fc49a9 | 2019-05-05 06:54:22 +0200 | [diff] [blame] | 1537 | HA_SPIN_LOCK(SERVER_LOCK, &s->lock); |
| 1538 | |
Willy Tarreau | 892337c | 2014-05-13 23:41:20 +0200 | [diff] [blame] | 1539 | /* recalculate the weights and update the state */ |
Willy Tarreau | 3ff577e | 2018-08-02 11:48:52 +0200 | [diff] [blame] | 1540 | server_recalc_eweight(s, 1); |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1541 | |
| 1542 | /* probably that we can refill this server with a bit more connections */ |
Willy Tarreau | 4aac7db | 2014-05-16 11:48:10 +0200 | [diff] [blame] | 1543 | pendconn_grab_from_px(s); |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1544 | |
Willy Tarreau | 4fc49a9 | 2019-05-05 06:54:22 +0200 | [diff] [blame] | 1545 | HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock); |
| 1546 | |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1547 | /* get back there in 1 second or 1/20th of the slowstart interval, |
| 1548 | * whichever is greater, resulting in small 5% steps. |
| 1549 | */ |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 1550 | if (s->next_state == SRV_ST_STARTING) |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1551 | t->expire = tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20))); |
| 1552 | return t; |
| 1553 | } |
| 1554 | |
Willy Tarreau | 894c642 | 2017-10-04 15:58:52 +0200 | [diff] [blame] | 1555 | /* returns the first NON-COMMENT tcp-check rule from list <list> or NULL if |
| 1556 | * none was found. |
| 1557 | */ |
| 1558 | static struct tcpcheck_rule *get_first_tcpcheck_rule(struct list *list) |
| 1559 | { |
| 1560 | struct tcpcheck_rule *r; |
| 1561 | |
| 1562 | list_for_each_entry(r, list, list) { |
Gaetan Rivet | 707b52f | 2020-02-21 18:14:59 +0100 | [diff] [blame] | 1563 | if (r->action != TCPCHK_ACT_COMMENT && r->action != TCPCHK_ACT_ACTION_KW) |
Willy Tarreau | 894c642 | 2017-10-04 15:58:52 +0200 | [diff] [blame] | 1564 | return r; |
| 1565 | } |
| 1566 | return NULL; |
| 1567 | } |
| 1568 | |
Gaetan Rivet | 1d22d7e | 2020-02-14 17:47:08 +0100 | [diff] [blame] | 1569 | /* returns the NON-COMMENT tcp-check rule from list <list> following <start> or |
| 1570 | * NULL if non was found. If <start> is NULL, it relies on |
| 1571 | * get_first_tcpcheck_rule(). |
| 1572 | */ |
| 1573 | static struct tcpcheck_rule *get_next_tcpcheck_rule(struct list *list, struct tcpcheck_rule *start) |
| 1574 | { |
| 1575 | struct tcpcheck_rule *r; |
| 1576 | |
| 1577 | if (!start) |
| 1578 | return get_first_tcpcheck_rule(list); |
| 1579 | |
| 1580 | r = LIST_NEXT(&start->list, typeof(r), list); |
| 1581 | list_for_each_entry_from(r, list, list) { |
Gaetan Rivet | 707b52f | 2020-02-21 18:14:59 +0100 | [diff] [blame] | 1582 | if (r->action != TCPCHK_ACT_COMMENT && r->action != TCPCHK_ACT_ACTION_KW) |
Gaetan Rivet | 1d22d7e | 2020-02-14 17:47:08 +0100 | [diff] [blame] | 1583 | return r; |
| 1584 | } |
| 1585 | return NULL; |
| 1586 | } |
| 1587 | |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1588 | /* |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1589 | * establish a server health-check that makes use of a connection. |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1590 | * |
| 1591 | * It can return one of : |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1592 | * - SF_ERR_NONE if everything's OK and tcpcheck_main() was not called |
| 1593 | * - SF_ERR_UP if if everything's OK and tcpcheck_main() was called |
| 1594 | * - SF_ERR_SRVTO if there are no more servers |
| 1595 | * - SF_ERR_SRVCL if the connection was refused by the server |
| 1596 | * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn) |
| 1597 | * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...) |
| 1598 | * - SF_ERR_INTERNAL for any other purely internal errors |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 1599 | * - SF_ERR_CHK_PORT if no port could be found to run a health check on an AF_INET* socket |
Tim Düsterhus | 4896c44 | 2016-11-29 02:15:19 +0100 | [diff] [blame] | 1600 | * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted. |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1601 | * Note that we try to prevent the network stack from sending the ACK during the |
| 1602 | * connect() when a pure TCP check is used (without PROXY protocol). |
| 1603 | */ |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1604 | static int connect_conn_chk(struct task *t) |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1605 | { |
| 1606 | struct check *check = t->context; |
| 1607 | struct server *s = check->server; |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1608 | struct conn_stream *cs = check->cs; |
| 1609 | struct connection *conn = cs_conn(cs); |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1610 | struct protocol *proto; |
| 1611 | int ret; |
Olivier Houchard | fdcb007 | 2019-05-06 18:32:29 +0200 | [diff] [blame] | 1612 | int connflags = 0; |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1613 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 1614 | /* we cannot have a connection here */ |
| 1615 | if (conn) |
| 1616 | return SF_ERR_INTERNAL; |
| 1617 | |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1618 | /* prepare the check buffer. |
| 1619 | * This should not be used if check is the secondary agent check |
| 1620 | * of a server as s->proxy->check_req will relate to the |
| 1621 | * configuration of the primary check. Similarly, tcp-check uses |
| 1622 | * its own strings. |
| 1623 | */ |
| 1624 | if (check->type && check->type != PR_O2_TCPCHK_CHK && !(check->state & CHK_ST_AGENT)) { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1625 | b_putblk(&check->bo, s->proxy->check_req, s->proxy->check_len); |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1626 | |
| 1627 | /* we want to check if this host replies to HTTP or SSLv3 requests |
| 1628 | * so we'll send the request, and won't wake the checker up now. |
| 1629 | */ |
| 1630 | if ((check->type) == PR_O2_SSL3_CHK) { |
| 1631 | /* SSL requires that we put Unix time in the request */ |
| 1632 | int gmt_time = htonl(date.tv_sec); |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1633 | memcpy(b_head(&check->bo) + 11, &gmt_time, 4); |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1634 | } |
| 1635 | else if ((check->type) == PR_O2_HTTP_CHK) { |
Cyril Bonté | 32602d2 | 2015-01-30 00:07:07 +0100 | [diff] [blame] | 1636 | /* prevent HTTP keep-alive when "http-check expect" is used */ |
| 1637 | if (s->proxy->options2 & PR_O2_EXP_TYPE) |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1638 | b_putist(&check->bo, ist("Connection: close\r\n")); |
Christopher Faulet | 8acb128 | 2020-04-09 08:44:06 +0200 | [diff] [blame] | 1639 | |
| 1640 | /* If there is a body, add its content-length */ |
| 1641 | if (s->proxy->check_body_len) |
| 1642 | chunk_appendf(&check->bo, "Content-Length: %s\r\n", ultoa(s->proxy->check_body_len)); |
| 1643 | |
| 1644 | /* Add configured headers */ |
| 1645 | if (s->proxy->check_hdrs) |
| 1646 | b_putblk(&check->bo, s->proxy->check_hdrs, s->proxy->check_hdrs_len); |
| 1647 | |
| 1648 | /* Add send-state header */ |
| 1649 | if (s->proxy->options2 & PR_O2_CHK_SNDST) |
| 1650 | b_putblk(&check->bo, trash.area, |
| 1651 | httpchk_build_status_header(s, trash.area, trash.size)); |
| 1652 | |
| 1653 | /* end-of-header */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1654 | b_putist(&check->bo, ist("\r\n")); |
Christopher Faulet | 8acb128 | 2020-04-09 08:44:06 +0200 | [diff] [blame] | 1655 | |
| 1656 | /* Add the body */ |
| 1657 | if (s->proxy->check_body) |
| 1658 | b_putblk(&check->bo, s->proxy->check_body, s->proxy->check_body_len); |
| 1659 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1660 | *b_tail(&check->bo) = '\0'; /* to make gdb output easier to read */ |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1661 | } |
| 1662 | } |
| 1663 | |
James Brown | 55f9ff1 | 2015-10-21 18:19:05 -0700 | [diff] [blame] | 1664 | if ((check->type & PR_O2_LB_AGENT_CHK) && check->send_string_len) { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1665 | b_putblk(&check->bo, check->send_string, check->send_string_len); |
James Brown | 55f9ff1 | 2015-10-21 18:19:05 -0700 | [diff] [blame] | 1666 | } |
| 1667 | |
Willy Tarreau | f411cce | 2017-10-04 16:21:19 +0200 | [diff] [blame] | 1668 | /* for tcp-checks, the initial connection setup is handled separately as |
| 1669 | * it may be sent to a specific port and not to the server's. |
| 1670 | */ |
Christopher Faulet | a202d1d | 2020-03-26 17:38:49 +0100 | [diff] [blame] | 1671 | if (check->type == PR_O2_TCPCHK_CHK) { |
| 1672 | /* tcpcheck initialisation */ |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 1673 | check->current_step = NULL; |
Willy Tarreau | f411cce | 2017-10-04 16:21:19 +0200 | [diff] [blame] | 1674 | tcpcheck_main(check); |
| 1675 | return SF_ERR_UP; |
| 1676 | } |
| 1677 | |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1678 | /* prepare a new connection */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1679 | cs = check->cs = cs_new(NULL); |
| 1680 | if (!check->cs) |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 1681 | return SF_ERR_RESOURCE; |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1682 | conn = cs->conn; |
Olivier Houchard | 26e1a8f | 2018-09-12 15:15:12 +0200 | [diff] [blame] | 1683 | /* Maybe there were an older connection we were waiting on */ |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 1684 | check->wait_list.events = 0; |
Olivier Houchard | ff1e9f3 | 2019-09-20 17:18:35 +0200 | [diff] [blame] | 1685 | tasklet_set_tid(check->wait_list.tasklet, tid); |
| 1686 | |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1687 | |
Willy Tarreau | ca79f59 | 2019-07-17 19:04:47 +0200 | [diff] [blame] | 1688 | if (!sockaddr_alloc(&conn->dst)) |
| 1689 | return SF_ERR_RESOURCE; |
| 1690 | |
Simon Horman | 41f5876 | 2015-01-30 11:22:56 +0900 | [diff] [blame] | 1691 | if (is_addr(&check->addr)) { |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1692 | /* we'll connect to the check addr specified on the server */ |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 1693 | *conn->dst = check->addr; |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1694 | } |
| 1695 | else { |
| 1696 | /* we'll connect to the addr on the server */ |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 1697 | *conn->dst = s->addr; |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1698 | } |
| 1699 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1700 | if (s->check.via_socks4 && (s->flags & SRV_F_SOCKS4_PROXY)) { |
| 1701 | conn->send_proxy_ofs = 1; |
| 1702 | conn->flags |= CO_FL_SOCKS4; |
| 1703 | } |
| 1704 | |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 1705 | proto = protocol_by_family(conn->dst->ss_family); |
Olivier Houchard | 6377a00 | 2017-12-01 22:04:05 +0100 | [diff] [blame] | 1706 | conn->target = &s->obj_type; |
| 1707 | |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 1708 | if ((conn->dst->ss_family == AF_INET) || (conn->dst->ss_family == AF_INET6)) { |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 1709 | int i = 0; |
| 1710 | |
| 1711 | i = srv_check_healthcheck_port(check); |
Olivier Houchard | 6377a00 | 2017-12-01 22:04:05 +0100 | [diff] [blame] | 1712 | if (i == 0) |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 1713 | return SF_ERR_CHK_PORT; |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 1714 | |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 1715 | set_host_port(conn->dst, i); |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1716 | } |
| 1717 | |
Thierry FOURNIER | bb2ae64 | 2015-01-14 11:31:49 +0100 | [diff] [blame] | 1718 | /* no client address */ |
Thierry FOURNIER | bb2ae64 | 2015-01-14 11:31:49 +0100 | [diff] [blame] | 1719 | |
Willy Tarreau | be37315 | 2018-09-06 11:45:30 +0200 | [diff] [blame] | 1720 | conn_prepare(conn, proto, check->xprt); |
Olivier Houchard | f67be93 | 2019-01-29 15:47:43 +0100 | [diff] [blame] | 1721 | if (conn_install_mux(conn, &mux_pt_ops, cs, s->proxy, NULL) < 0) |
| 1722 | return SF_ERR_RESOURCE; |
Willy Tarreau | be37315 | 2018-09-06 11:45:30 +0200 | [diff] [blame] | 1723 | cs_attach(cs, check, &check_conn_cb); |
| 1724 | |
Christopher Faulet | a202d1d | 2020-03-26 17:38:49 +0100 | [diff] [blame] | 1725 | /* only plain tcp check supports quick ACK */ |
| 1726 | connflags |= (check->type ? CONNECT_HAS_DATA : CONNECT_DELACK_ALWAYS); |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1727 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1728 | ret = SF_ERR_INTERNAL; |
Olivier Houchard | b68fda4 | 2017-08-04 18:39:01 +0200 | [diff] [blame] | 1729 | if (proto && proto->connect) |
Olivier Houchard | fdcb007 | 2019-05-06 18:32:29 +0200 | [diff] [blame] | 1730 | ret = proto->connect(conn, connflags); |
Willy Tarreau | 16257f6 | 2017-11-02 15:45:00 +0100 | [diff] [blame] | 1731 | |
Willy Tarreau | 16257f6 | 2017-11-02 15:45:00 +0100 | [diff] [blame] | 1732 | |
Olivier Houchard | 9130a96 | 2017-10-17 17:33:43 +0200 | [diff] [blame] | 1733 | #ifdef USE_OPENSSL |
Olivier Houchard | a48437b | 2019-01-29 16:37:52 +0100 | [diff] [blame] | 1734 | if (ret == SF_ERR_NONE) { |
| 1735 | if (s->check.sni) |
| 1736 | ssl_sock_set_servername(conn, s->check.sni); |
| 1737 | if (s->check.alpn_str) |
| 1738 | ssl_sock_set_alpn(conn, (unsigned char *)s->check.alpn_str, |
| 1739 | s->check.alpn_len); |
| 1740 | } |
Olivier Houchard | 9130a96 | 2017-10-17 17:33:43 +0200 | [diff] [blame] | 1741 | #endif |
Willy Tarreau | f494977 | 2017-05-06 08:45:28 +0200 | [diff] [blame] | 1742 | if (s->check.send_proxy && !(check->state & CHK_ST_AGENT)) { |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1743 | conn->send_proxy_ofs = 1; |
| 1744 | conn->flags |= CO_FL_SEND_PROXY; |
Olivier Houchard | 37d7897 | 2019-12-30 15:13:42 +0100 | [diff] [blame] | 1745 | } |
| 1746 | if (conn->flags & (CO_FL_SEND_PROXY | CO_FL_SOCKS4) && |
| 1747 | conn_ctrl_ready(conn)) { |
Olivier Houchard | fe50bfb | 2019-05-27 12:09:19 +0200 | [diff] [blame] | 1748 | if (xprt_add_hs(conn) < 0) |
| 1749 | ret = SF_ERR_RESOURCE; |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1750 | } |
| 1751 | |
| 1752 | return ret; |
| 1753 | } |
| 1754 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1755 | static struct list pid_list = LIST_HEAD_INIT(pid_list); |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1756 | static struct pool_head *pool_head_pid_list; |
Willy Tarreau | 86abe44 | 2018-11-25 20:12:18 +0100 | [diff] [blame] | 1757 | __decl_spinlock(pid_list_lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1758 | |
| 1759 | void block_sigchld(void) |
| 1760 | { |
| 1761 | sigset_t set; |
| 1762 | sigemptyset(&set); |
| 1763 | sigaddset(&set, SIGCHLD); |
William Lallemand | 6e1796e | 2018-06-07 11:23:40 +0200 | [diff] [blame] | 1764 | assert(ha_sigmask(SIG_BLOCK, &set, NULL) == 0); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1765 | } |
| 1766 | |
| 1767 | void unblock_sigchld(void) |
| 1768 | { |
| 1769 | sigset_t set; |
| 1770 | sigemptyset(&set); |
Willy Tarreau | ebc9244 | 2016-06-21 17:29:46 +0200 | [diff] [blame] | 1771 | sigaddset(&set, SIGCHLD); |
William Lallemand | 6e1796e | 2018-06-07 11:23:40 +0200 | [diff] [blame] | 1772 | assert(ha_sigmask(SIG_UNBLOCK, &set, NULL) == 0); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1773 | } |
| 1774 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1775 | static struct pid_list *pid_list_add(pid_t pid, struct task *t) |
| 1776 | { |
| 1777 | struct pid_list *elem; |
| 1778 | struct check *check = t->context; |
| 1779 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1780 | elem = pool_alloc(pool_head_pid_list); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1781 | if (!elem) |
| 1782 | return NULL; |
| 1783 | elem->pid = pid; |
| 1784 | elem->t = t; |
| 1785 | elem->exited = 0; |
| 1786 | check->curpid = elem; |
| 1787 | LIST_INIT(&elem->list); |
Christopher Faulet | cfda847 | 2017-10-20 15:40:23 +0200 | [diff] [blame] | 1788 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1789 | HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1790 | LIST_ADD(&pid_list, &elem->list); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1791 | HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock); |
Christopher Faulet | cfda847 | 2017-10-20 15:40:23 +0200 | [diff] [blame] | 1792 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1793 | return elem; |
| 1794 | } |
| 1795 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1796 | static void pid_list_del(struct pid_list *elem) |
| 1797 | { |
| 1798 | struct check *check; |
| 1799 | |
| 1800 | if (!elem) |
| 1801 | return; |
| 1802 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1803 | HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1804 | LIST_DEL(&elem->list); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1805 | HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock); |
Christopher Faulet | cfda847 | 2017-10-20 15:40:23 +0200 | [diff] [blame] | 1806 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1807 | if (!elem->exited) |
| 1808 | kill(elem->pid, SIGTERM); |
| 1809 | |
| 1810 | check = elem->t->context; |
| 1811 | check->curpid = NULL; |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1812 | pool_free(pool_head_pid_list, elem); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1813 | } |
| 1814 | |
| 1815 | /* Called from inside SIGCHLD handler, SIGCHLD is blocked */ |
| 1816 | static void pid_list_expire(pid_t pid, int status) |
| 1817 | { |
| 1818 | struct pid_list *elem; |
| 1819 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1820 | HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1821 | list_for_each_entry(elem, &pid_list, list) { |
| 1822 | if (elem->pid == pid) { |
| 1823 | elem->t->expire = now_ms; |
| 1824 | elem->status = status; |
| 1825 | elem->exited = 1; |
Cyril Bonté | 9dbcfab | 2014-08-07 01:55:39 +0200 | [diff] [blame] | 1826 | task_wakeup(elem->t, TASK_WOKEN_IO); |
Christopher Faulet | cfda847 | 2017-10-20 15:40:23 +0200 | [diff] [blame] | 1827 | break; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1828 | } |
| 1829 | } |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1830 | HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1831 | } |
| 1832 | |
Willy Tarreau | 48d6bf2 | 2016-06-21 16:27:34 +0200 | [diff] [blame] | 1833 | static void sigchld_handler(struct sig_handler *sh) |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1834 | { |
| 1835 | pid_t pid; |
| 1836 | int status; |
Willy Tarreau | 48d6bf2 | 2016-06-21 16:27:34 +0200 | [diff] [blame] | 1837 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1838 | while ((pid = waitpid(0, &status, WNOHANG)) > 0) |
| 1839 | pid_list_expire(pid, status); |
| 1840 | } |
| 1841 | |
Willy Tarreau | 48d6bf2 | 2016-06-21 16:27:34 +0200 | [diff] [blame] | 1842 | static int init_pid_list(void) |
| 1843 | { |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1844 | if (pool_head_pid_list != NULL) |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1845 | /* Nothing to do */ |
| 1846 | return 0; |
| 1847 | |
Willy Tarreau | 48d6bf2 | 2016-06-21 16:27:34 +0200 | [diff] [blame] | 1848 | if (!signal_register_fct(SIGCHLD, sigchld_handler, SIGCHLD)) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1849 | ha_alert("Failed to set signal handler for external health checks: %s. Aborting.\n", |
| 1850 | strerror(errno)); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1851 | return 1; |
| 1852 | } |
| 1853 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1854 | pool_head_pid_list = create_pool("pid_list", sizeof(struct pid_list), MEM_F_SHARED); |
| 1855 | if (pool_head_pid_list == NULL) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1856 | ha_alert("Failed to allocate memory pool for external health checks: %s. Aborting.\n", |
| 1857 | strerror(errno)); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1858 | return 1; |
| 1859 | } |
| 1860 | |
| 1861 | return 0; |
| 1862 | } |
| 1863 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1864 | /* helper macro to set an environment variable and jump to a specific label on failure. */ |
| 1865 | #define EXTCHK_SETENV(check, envidx, value, fail) { if (extchk_setenv(check, envidx, value)) goto fail; } |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1866 | |
| 1867 | /* |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1868 | * helper function to allocate enough memory to store an environment variable. |
| 1869 | * It will also check that the environment variable is updatable, and silently |
| 1870 | * fail if not. |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1871 | */ |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1872 | static int extchk_setenv(struct check *check, int idx, const char *value) |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1873 | { |
| 1874 | int len, ret; |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1875 | char *envname; |
| 1876 | int vmaxlen; |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1877 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1878 | if (idx < 0 || idx >= EXTCHK_SIZE) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1879 | ha_alert("Illegal environment variable index %d. Aborting.\n", idx); |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1880 | return 1; |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1881 | } |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1882 | |
| 1883 | envname = extcheck_envs[idx].name; |
| 1884 | vmaxlen = extcheck_envs[idx].vmaxlen; |
| 1885 | |
| 1886 | /* Check if the environment variable is already set, and silently reject |
| 1887 | * the update if this one is not updatable. */ |
| 1888 | if ((vmaxlen == EXTCHK_SIZE_EVAL_INIT) && (check->envp[idx])) |
| 1889 | return 0; |
| 1890 | |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1891 | /* Instead of sending NOT_USED, sending an empty value is preferable */ |
| 1892 | if (strcmp(value, "NOT_USED") == 0) { |
| 1893 | value = ""; |
| 1894 | } |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1895 | |
| 1896 | len = strlen(envname) + 1; |
| 1897 | if (vmaxlen == EXTCHK_SIZE_EVAL_INIT) |
| 1898 | len += strlen(value); |
| 1899 | else |
| 1900 | len += vmaxlen; |
| 1901 | |
| 1902 | if (!check->envp[idx]) |
| 1903 | check->envp[idx] = malloc(len + 1); |
| 1904 | |
| 1905 | if (!check->envp[idx]) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1906 | ha_alert("Failed to allocate memory for the environment variable '%s'. Aborting.\n", envname); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1907 | return 1; |
| 1908 | } |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1909 | ret = snprintf(check->envp[idx], len + 1, "%s=%s", envname, value); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1910 | if (ret < 0) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1911 | ha_alert("Failed to store the environment variable '%s'. Reason : %s. Aborting.\n", envname, strerror(errno)); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1912 | return 1; |
| 1913 | } |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1914 | else if (ret > len) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1915 | ha_alert("Environment variable '%s' was truncated. Aborting.\n", envname); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1916 | return 1; |
| 1917 | } |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1918 | return 0; |
| 1919 | } |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1920 | |
| 1921 | static int prepare_external_check(struct check *check) |
| 1922 | { |
| 1923 | struct server *s = check->server; |
| 1924 | struct proxy *px = s->proxy; |
| 1925 | struct listener *listener = NULL, *l; |
| 1926 | int i; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1927 | const char *path = px->check_path ? px->check_path : DEF_CHECK_PATH; |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1928 | char buf[256]; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1929 | |
| 1930 | list_for_each_entry(l, &px->conf.listeners, by_fe) |
| 1931 | /* Use the first INET, INET6 or UNIX listener */ |
| 1932 | if (l->addr.ss_family == AF_INET || |
| 1933 | l->addr.ss_family == AF_INET6 || |
| 1934 | l->addr.ss_family == AF_UNIX) { |
| 1935 | listener = l; |
| 1936 | break; |
| 1937 | } |
| 1938 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1939 | check->curpid = NULL; |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1940 | check->envp = calloc((EXTCHK_SIZE + 1), sizeof(char *)); |
| 1941 | if (!check->envp) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1942 | ha_alert("Failed to allocate memory for environment variables. Aborting\n"); |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1943 | goto err; |
| 1944 | } |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1945 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1946 | check->argv = calloc(6, sizeof(char *)); |
| 1947 | if (!check->argv) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1948 | ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1949 | goto err; |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1950 | } |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1951 | |
| 1952 | check->argv[0] = px->check_command; |
| 1953 | |
Cyril Bonté | 777be86 | 2014-12-02 21:21:35 +0100 | [diff] [blame] | 1954 | if (!listener) { |
| 1955 | check->argv[1] = strdup("NOT_USED"); |
| 1956 | check->argv[2] = strdup("NOT_USED"); |
| 1957 | } |
| 1958 | else if (listener->addr.ss_family == AF_INET || |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1959 | listener->addr.ss_family == AF_INET6) { |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1960 | addr_to_str(&listener->addr, buf, sizeof(buf)); |
| 1961 | check->argv[1] = strdup(buf); |
| 1962 | port_to_str(&listener->addr, buf, sizeof(buf)); |
| 1963 | check->argv[2] = strdup(buf); |
Cyril Bonté | 777be86 | 2014-12-02 21:21:35 +0100 | [diff] [blame] | 1964 | } |
| 1965 | else if (listener->addr.ss_family == AF_UNIX) { |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1966 | const struct sockaddr_un *un; |
| 1967 | |
| 1968 | un = (struct sockaddr_un *)&listener->addr; |
| 1969 | check->argv[1] = strdup(un->sun_path); |
| 1970 | check->argv[2] = strdup("NOT_USED"); |
Cyril Bonté | 777be86 | 2014-12-02 21:21:35 +0100 | [diff] [blame] | 1971 | } |
| 1972 | else { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1973 | ha_alert("Starting [%s:%s] check: unsupported address family.\n", px->id, s->id); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1974 | goto err; |
| 1975 | } |
| 1976 | |
Christopher Faulet | aaae9a0 | 2020-04-26 09:50:31 +0200 | [diff] [blame] | 1977 | if (!check->argv[1] || !check->argv[2]) { |
| 1978 | ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id); |
| 1979 | goto err; |
| 1980 | } |
| 1981 | |
| 1982 | check->argv[3] = calloc(EXTCHK_SIZE_ADDR, sizeof(*check->argv[3])); |
| 1983 | check->argv[4] = calloc(EXTCHK_SIZE_UINT, sizeof(*check->argv[4])); |
| 1984 | if (!check->argv[3] || !check->argv[4]) { |
| 1985 | ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id); |
| 1986 | goto err; |
| 1987 | } |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 1988 | |
Christopher Faulet | aaae9a0 | 2020-04-26 09:50:31 +0200 | [diff] [blame] | 1989 | addr_to_str(&s->addr, check->argv[3], EXTCHK_SIZE_ADDR); |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 1990 | if (s->addr.ss_family == AF_INET || s->addr.ss_family == AF_INET6) |
Christopher Faulet | aaae9a0 | 2020-04-26 09:50:31 +0200 | [diff] [blame] | 1991 | snprintf(check->argv[4], EXTCHK_SIZE_UINT, "%u", s->svc_port); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1992 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1993 | for (i = 0; i < 5; i++) { |
| 1994 | if (!check->argv[i]) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1995 | ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1996 | goto err; |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1997 | } |
| 1998 | } |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1999 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 2000 | EXTCHK_SETENV(check, EXTCHK_PATH, path, err); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 2001 | /* Add proxy environment variables */ |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 2002 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_NAME, px->id, err); |
| 2003 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_ID, ultoa_r(px->uuid, buf, sizeof(buf)), err); |
| 2004 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_ADDR, check->argv[1], err); |
| 2005 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_PORT, check->argv[2], err); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 2006 | /* Add server environment variables */ |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 2007 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_NAME, s->id, err); |
| 2008 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_ID, ultoa_r(s->puid, buf, sizeof(buf)), err); |
| 2009 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_ADDR, check->argv[3], err); |
| 2010 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_PORT, check->argv[4], err); |
| 2011 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_MAXCONN, ultoa_r(s->maxconn, buf, sizeof(buf)), err); |
| 2012 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_CURCONN, ultoa_r(s->cur_sess, buf, sizeof(buf)), err); |
| 2013 | |
| 2014 | /* Ensure that we don't leave any hole in check->envp */ |
| 2015 | for (i = 0; i < EXTCHK_SIZE; i++) |
| 2016 | if (!check->envp[i]) |
| 2017 | EXTCHK_SETENV(check, i, "", err); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 2018 | |
Cyril Bonté | 99c5bf5 | 2014-08-07 01:55:38 +0200 | [diff] [blame] | 2019 | return 1; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2020 | err: |
| 2021 | if (check->envp) { |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 2022 | for (i = 0; i < EXTCHK_SIZE; i++) |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 2023 | free(check->envp[i]); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2024 | free(check->envp); |
| 2025 | check->envp = NULL; |
| 2026 | } |
| 2027 | |
| 2028 | if (check->argv) { |
| 2029 | for (i = 1; i < 5; i++) |
| 2030 | free(check->argv[i]); |
| 2031 | free(check->argv); |
| 2032 | check->argv = NULL; |
| 2033 | } |
Cyril Bonté | 99c5bf5 | 2014-08-07 01:55:38 +0200 | [diff] [blame] | 2034 | return 0; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2035 | } |
| 2036 | |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 2037 | /* |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2038 | * establish a server health-check that makes use of a process. |
| 2039 | * |
| 2040 | * It can return one of : |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2041 | * - SF_ERR_NONE if everything's OK |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2042 | * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...) |
Tim Düsterhus | 4896c44 | 2016-11-29 02:15:19 +0100 | [diff] [blame] | 2043 | * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted. |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2044 | * |
| 2045 | * Blocks and then unblocks SIGCHLD |
| 2046 | */ |
| 2047 | static int connect_proc_chk(struct task *t) |
| 2048 | { |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 2049 | char buf[256]; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2050 | struct check *check = t->context; |
| 2051 | struct server *s = check->server; |
| 2052 | struct proxy *px = s->proxy; |
| 2053 | int status; |
| 2054 | pid_t pid; |
| 2055 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2056 | status = SF_ERR_RESOURCE; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2057 | |
| 2058 | block_sigchld(); |
| 2059 | |
| 2060 | pid = fork(); |
| 2061 | if (pid < 0) { |
Willy Tarreau | d96f112 | 2019-12-03 07:07:36 +0100 | [diff] [blame] | 2062 | ha_alert("Failed to fork process for external health check%s: %s. Aborting.\n", |
| 2063 | (global.tune.options & GTUNE_INSECURE_FORK) ? |
| 2064 | "" : " (likely caused by missing 'insecure-fork-wanted')", |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2065 | strerror(errno)); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2066 | set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno)); |
| 2067 | goto out; |
| 2068 | } |
| 2069 | if (pid == 0) { |
| 2070 | /* Child */ |
| 2071 | extern char **environ; |
Willy Tarreau | 9f6dc72 | 2019-03-01 11:15:10 +0100 | [diff] [blame] | 2072 | struct rlimit limit; |
Willy Tarreau | b7b2478 | 2016-06-21 15:32:29 +0200 | [diff] [blame] | 2073 | int fd; |
| 2074 | |
| 2075 | /* close all FDs. Keep stdin/stdout/stderr in verbose mode */ |
| 2076 | fd = (global.mode & (MODE_QUIET|MODE_VERBOSE)) == MODE_QUIET ? 0 : 3; |
| 2077 | |
Willy Tarreau | 2555ccf | 2019-02-21 22:22:06 +0100 | [diff] [blame] | 2078 | my_closefrom(fd); |
Willy Tarreau | b7b2478 | 2016-06-21 15:32:29 +0200 | [diff] [blame] | 2079 | |
Willy Tarreau | 9f6dc72 | 2019-03-01 11:15:10 +0100 | [diff] [blame] | 2080 | /* restore the initial FD limits */ |
| 2081 | limit.rlim_cur = rlim_fd_cur_at_boot; |
| 2082 | limit.rlim_max = rlim_fd_max_at_boot; |
| 2083 | if (setrlimit(RLIMIT_NOFILE, &limit) == -1) { |
| 2084 | getrlimit(RLIMIT_NOFILE, &limit); |
| 2085 | ha_warning("External check: failed to restore initial FD limits (cur=%u max=%u), using cur=%u max=%u\n", |
| 2086 | rlim_fd_cur_at_boot, rlim_fd_max_at_boot, |
| 2087 | (unsigned int)limit.rlim_cur, (unsigned int)limit.rlim_max); |
| 2088 | } |
| 2089 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2090 | environ = check->envp; |
Christopher Faulet | aaae9a0 | 2020-04-26 09:50:31 +0200 | [diff] [blame] | 2091 | |
| 2092 | /* Update some environment variables and command args: curconn, server addr and server port */ |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 2093 | extchk_setenv(check, EXTCHK_HAPROXY_SERVER_CURCONN, ultoa_r(s->cur_sess, buf, sizeof(buf))); |
Christopher Faulet | aaae9a0 | 2020-04-26 09:50:31 +0200 | [diff] [blame] | 2094 | |
| 2095 | addr_to_str(&s->addr, check->argv[3], EXTCHK_SIZE_ADDR); |
| 2096 | extchk_setenv(check, EXTCHK_HAPROXY_SERVER_ADDR, check->argv[3]); |
| 2097 | |
| 2098 | *check->argv[4] = 0; |
| 2099 | if (s->addr.ss_family == AF_INET || s->addr.ss_family == AF_INET6) |
| 2100 | snprintf(check->argv[4], EXTCHK_SIZE_UINT, "%u", s->svc_port); |
| 2101 | extchk_setenv(check, EXTCHK_HAPROXY_SERVER_PORT, check->argv[4]); |
| 2102 | |
Willy Tarreau | 2df8cad | 2019-07-01 07:51:29 +0200 | [diff] [blame] | 2103 | haproxy_unblock_signals(); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2104 | execvp(px->check_command, check->argv); |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2105 | ha_alert("Failed to exec process for external health check: %s. Aborting.\n", |
| 2106 | strerror(errno)); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2107 | exit(-1); |
| 2108 | } |
| 2109 | |
| 2110 | /* Parent */ |
| 2111 | if (check->result == CHK_RES_UNKNOWN) { |
| 2112 | if (pid_list_add(pid, t) != NULL) { |
| 2113 | t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter)); |
| 2114 | |
| 2115 | if (px->timeout.check && px->timeout.connect) { |
| 2116 | int t_con = tick_add(now_ms, px->timeout.connect); |
| 2117 | t->expire = tick_first(t->expire, t_con); |
| 2118 | } |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2119 | status = SF_ERR_NONE; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2120 | goto out; |
| 2121 | } |
| 2122 | else { |
| 2123 | set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno)); |
| 2124 | } |
| 2125 | kill(pid, SIGTERM); /* process creation error */ |
| 2126 | } |
| 2127 | else |
| 2128 | set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno)); |
| 2129 | |
| 2130 | out: |
| 2131 | unblock_sigchld(); |
| 2132 | return status; |
| 2133 | } |
| 2134 | |
| 2135 | /* |
Willy Tarreau | 1e62e2a | 2017-10-04 15:07:02 +0200 | [diff] [blame] | 2136 | * manages a server health-check that uses an external process. Returns |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2137 | * the time the task accepts to wait, or TIME_ETERNITY for infinity. |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2138 | * |
| 2139 | * Please do NOT place any return statement in this function and only leave |
| 2140 | * via the out_unlock label. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2141 | */ |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2142 | static struct task *process_chk_proc(struct task *t, void *context, unsigned short state) |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2143 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2144 | struct check *check = context; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2145 | struct server *s = check->server; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2146 | int rv; |
| 2147 | int ret; |
| 2148 | int expired = tick_is_expired(t->expire, now_ms); |
| 2149 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 2150 | HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2151 | if (!(check->state & CHK_ST_INPROGRESS)) { |
| 2152 | /* no check currently running */ |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2153 | if (!expired) /* woke up too early */ |
| 2154 | goto out_unlock; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2155 | |
| 2156 | /* we don't send any health-checks when the proxy is |
| 2157 | * stopped, the server should not be checked or the check |
| 2158 | * is disabled. |
| 2159 | */ |
| 2160 | if (((check->state & (CHK_ST_ENABLED | CHK_ST_PAUSED)) != CHK_ST_ENABLED) || |
| 2161 | s->proxy->state == PR_STSTOPPED) |
| 2162 | goto reschedule; |
| 2163 | |
| 2164 | /* we'll initiate a new check */ |
| 2165 | set_server_check_status(check, HCHK_STATUS_START, NULL); |
| 2166 | |
| 2167 | check->state |= CHK_ST_INPROGRESS; |
| 2168 | |
Simon Horman | dbf7019 | 2015-01-30 11:22:53 +0900 | [diff] [blame] | 2169 | ret = connect_proc_chk(t); |
Willy Tarreau | d7c3fbd | 2017-10-04 15:19:26 +0200 | [diff] [blame] | 2170 | if (ret == SF_ERR_NONE) { |
Willy Tarreau | 1e62e2a | 2017-10-04 15:07:02 +0200 | [diff] [blame] | 2171 | /* the process was forked, we allow up to min(inter, |
| 2172 | * timeout.connect) for it to report its status, but |
| 2173 | * only when timeout.check is set as it may be to short |
| 2174 | * for a full check otherwise. |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2175 | */ |
| 2176 | t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter)); |
| 2177 | |
| 2178 | if (s->proxy->timeout.check && s->proxy->timeout.connect) { |
| 2179 | int t_con = tick_add(now_ms, s->proxy->timeout.connect); |
| 2180 | t->expire = tick_first(t->expire, t_con); |
| 2181 | } |
Christopher Faulet | 88ce5d1 | 2017-10-20 15:41:18 +0200 | [diff] [blame] | 2182 | task_set_affinity(t, tid_bit); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2183 | goto reschedule; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2184 | } |
| 2185 | |
Willy Tarreau | 1e62e2a | 2017-10-04 15:07:02 +0200 | [diff] [blame] | 2186 | /* here, we failed to start the check */ |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2187 | |
| 2188 | check->state &= ~CHK_ST_INPROGRESS; |
| 2189 | check_notify_failure(check); |
| 2190 | |
| 2191 | /* we allow up to min(inter, timeout.connect) for a connection |
| 2192 | * to establish but only when timeout.check is set |
| 2193 | * as it may be to short for a full check otherwise |
| 2194 | */ |
| 2195 | while (tick_is_expired(t->expire, now_ms)) { |
| 2196 | int t_con; |
| 2197 | |
| 2198 | t_con = tick_add(t->expire, s->proxy->timeout.connect); |
| 2199 | t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter)); |
| 2200 | |
| 2201 | if (s->proxy->timeout.check) |
| 2202 | t->expire = tick_first(t->expire, t_con); |
| 2203 | } |
| 2204 | } |
| 2205 | else { |
| 2206 | /* there was a test running. |
| 2207 | * First, let's check whether there was an uncaught error, |
| 2208 | * which can happen on connect timeout or error. |
| 2209 | */ |
| 2210 | if (check->result == CHK_RES_UNKNOWN) { |
| 2211 | /* good connection is enough for pure TCP check */ |
| 2212 | struct pid_list *elem = check->curpid; |
| 2213 | int status = HCHK_STATUS_UNKNOWN; |
| 2214 | |
| 2215 | if (elem->exited) { |
| 2216 | status = elem->status; /* Save in case the process exits between use below */ |
| 2217 | if (!WIFEXITED(status)) |
| 2218 | check->code = -1; |
| 2219 | else |
| 2220 | check->code = WEXITSTATUS(status); |
| 2221 | if (!WIFEXITED(status) || WEXITSTATUS(status)) |
| 2222 | status = HCHK_STATUS_PROCERR; |
| 2223 | else |
| 2224 | status = HCHK_STATUS_PROCOK; |
| 2225 | } else if (expired) { |
| 2226 | status = HCHK_STATUS_PROCTOUT; |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2227 | ha_warning("kill %d\n", (int)elem->pid); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2228 | kill(elem->pid, SIGTERM); |
| 2229 | } |
| 2230 | set_server_check_status(check, status, NULL); |
| 2231 | } |
| 2232 | |
| 2233 | if (check->result == CHK_RES_FAILED) { |
| 2234 | /* a failure or timeout detected */ |
| 2235 | check_notify_failure(check); |
| 2236 | } |
| 2237 | else if (check->result == CHK_RES_CONDPASS) { |
| 2238 | /* check is OK but asks for stopping mode */ |
| 2239 | check_notify_stopping(check); |
| 2240 | } |
| 2241 | else if (check->result == CHK_RES_PASSED) { |
| 2242 | /* a success was detected */ |
| 2243 | check_notify_success(check); |
| 2244 | } |
Willy Tarreau | 6dd4ac8 | 2019-09-03 18:55:02 +0200 | [diff] [blame] | 2245 | task_set_affinity(t, 1); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2246 | check->state &= ~CHK_ST_INPROGRESS; |
| 2247 | |
| 2248 | pid_list_del(check->curpid); |
| 2249 | |
| 2250 | rv = 0; |
| 2251 | if (global.spread_checks > 0) { |
| 2252 | rv = srv_getinter(check) * global.spread_checks / 100; |
Willy Tarreau | 5a6d3e7 | 2020-03-08 17:53:53 +0100 | [diff] [blame] | 2253 | rv -= (int) (2 * rv * (ha_random32() / 4294967295.0)); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2254 | } |
| 2255 | t->expire = tick_add(now_ms, MS_TO_TICKS(srv_getinter(check) + rv)); |
| 2256 | } |
| 2257 | |
| 2258 | reschedule: |
| 2259 | while (tick_is_expired(t->expire, now_ms)) |
| 2260 | t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter)); |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2261 | |
| 2262 | out_unlock: |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 2263 | HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2264 | return t; |
| 2265 | } |
| 2266 | |
| 2267 | /* |
| 2268 | * manages a server health-check that uses a connection. Returns |
| 2269 | * the time the task accepts to wait, or TIME_ETERNITY for infinity. |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2270 | * |
| 2271 | * Please do NOT place any return statement in this function and only leave |
| 2272 | * via the out_unlock label. |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2273 | */ |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2274 | static struct task *process_chk_conn(struct task *t, void *context, unsigned short state) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2275 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2276 | struct check *check = context; |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2277 | struct proxy *proxy = check->proxy; |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2278 | struct conn_stream *cs = check->cs; |
| 2279 | struct connection *conn = cs_conn(cs); |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2280 | int rv; |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 2281 | int ret; |
Willy Tarreau | acbdc7a | 2012-11-23 14:02:10 +0100 | [diff] [blame] | 2282 | int expired = tick_is_expired(t->expire, now_ms); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2283 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2284 | if (check->server) |
| 2285 | HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock); |
Willy Tarreau | 2c115e5 | 2013-12-11 19:41:16 +0100 | [diff] [blame] | 2286 | if (!(check->state & CHK_ST_INPROGRESS)) { |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2287 | /* no check currently running */ |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2288 | if (!expired) /* woke up too early */ |
| 2289 | goto out_unlock; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2290 | |
Simon Horman | 671b6f0 | 2013-11-25 10:46:39 +0900 | [diff] [blame] | 2291 | /* we don't send any health-checks when the proxy is |
| 2292 | * stopped, the server should not be checked or the check |
| 2293 | * is disabled. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2294 | */ |
Willy Tarreau | 0d924cc | 2013-12-11 21:26:24 +0100 | [diff] [blame] | 2295 | if (((check->state & (CHK_ST_ENABLED | CHK_ST_PAUSED)) != CHK_ST_ENABLED) || |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2296 | proxy->state == PR_STSTOPPED) |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2297 | goto reschedule; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2298 | |
| 2299 | /* we'll initiate a new check */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2300 | set_server_check_status(check, HCHK_STATUS_START, NULL); |
Willy Tarreau | 1ae1b7b | 2012-09-28 15:28:30 +0200 | [diff] [blame] | 2301 | |
Willy Tarreau | 2c115e5 | 2013-12-11 19:41:16 +0100 | [diff] [blame] | 2302 | check->state |= CHK_ST_INPROGRESS; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2303 | b_reset(&check->bi); |
| 2304 | b_reset(&check->bo); |
Willy Tarreau | 1ae1b7b | 2012-09-28 15:28:30 +0200 | [diff] [blame] | 2305 | |
Olivier Houchard | aebeff7 | 2019-11-29 16:18:51 +0100 | [diff] [blame] | 2306 | task_set_affinity(t, tid_bit); |
Simon Horman | dbf7019 | 2015-01-30 11:22:53 +0900 | [diff] [blame] | 2307 | ret = connect_conn_chk(t); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2308 | cs = check->cs; |
| 2309 | conn = cs_conn(cs); |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2310 | |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 2311 | switch (ret) { |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2312 | case SF_ERR_UP: |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2313 | goto out_unlock; |
| 2314 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2315 | case SF_ERR_NONE: |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 2316 | /* we allow up to min(inter, timeout.connect) for a connection |
| 2317 | * to establish but only when timeout.check is set |
| 2318 | * as it may be to short for a full check otherwise |
| 2319 | */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2320 | t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter)); |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2321 | if (proxy->timeout.check && proxy->timeout.connect) { |
| 2322 | int t_con = tick_add(now_ms, proxy->timeout.connect); |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 2323 | t->expire = tick_first(t->expire, t_con); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2324 | } |
Willy Tarreau | 06559ac | 2013-12-05 01:53:08 +0100 | [diff] [blame] | 2325 | |
Willy Tarreau | cc705a6 | 2019-09-05 17:51:30 +0200 | [diff] [blame] | 2326 | if (check->type) { |
| 2327 | /* send the request if we have one. We avoid receiving |
| 2328 | * if not connected, unless we didn't subscribe for |
| 2329 | * sending since otherwise we won't be woken up. |
| 2330 | */ |
| 2331 | __event_srv_chk_w(cs); |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 2332 | if (!(conn->flags & CO_FL_WAIT_XPRT) || |
Willy Tarreau | c594039 | 2019-09-05 17:38:40 +0200 | [diff] [blame] | 2333 | !(check->wait_list.events & SUB_RETRY_SEND)) |
| 2334 | __event_srv_chk_r(cs); |
Willy Tarreau | cc705a6 | 2019-09-05 17:51:30 +0200 | [diff] [blame] | 2335 | } |
Willy Tarreau | 06559ac | 2013-12-05 01:53:08 +0100 | [diff] [blame] | 2336 | |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2337 | goto reschedule; |
| 2338 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2339 | case SF_ERR_SRVTO: /* ETIMEDOUT */ |
| 2340 | case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */ |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2341 | if (conn) |
| 2342 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 2343 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2344 | break; |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 2345 | /* should share same code than cases below */ |
| 2346 | case SF_ERR_CHK_PORT: |
| 2347 | check->state |= CHK_ST_PORT_MISS; |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2348 | case SF_ERR_PRXCOND: |
| 2349 | case SF_ERR_RESOURCE: |
| 2350 | case SF_ERR_INTERNAL: |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2351 | if (conn) |
| 2352 | conn->flags |= CO_FL_ERROR; |
| 2353 | chk_report_conn_err(check, conn ? 0 : ENOMEM, 0); |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2354 | break; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2355 | } |
| 2356 | |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2357 | /* here, we have seen a synchronous error, no fd was allocated */ |
Olivier Houchard | aebeff7 | 2019-11-29 16:18:51 +0100 | [diff] [blame] | 2358 | task_set_affinity(t, MAX_THREADS_MASK); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2359 | if (cs) { |
Olivier Houchard | 4906554 | 2019-05-31 19:20:36 +0200 | [diff] [blame] | 2360 | if (check->wait_list.events) |
| 2361 | cs->conn->xprt->unsubscribe(cs->conn, |
| 2362 | cs->conn->xprt_ctx, |
| 2363 | check->wait_list.events, |
| 2364 | &check->wait_list); |
| 2365 | /* We may have been scheduled to run, and the |
| 2366 | * I/O handler expects to have a cs, so remove |
| 2367 | * the tasklet |
| 2368 | */ |
Willy Tarreau | 86eded6 | 2019-06-14 14:47:49 +0200 | [diff] [blame] | 2369 | tasklet_remove_from_tasklet_list(check->wait_list.tasklet); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2370 | cs_destroy(cs); |
| 2371 | cs = check->cs = NULL; |
| 2372 | conn = NULL; |
Olivier Houchard | 390485a | 2017-10-24 19:03:30 +0200 | [diff] [blame] | 2373 | } |
Willy Tarreau | 6b0a850 | 2012-11-23 08:51:32 +0100 | [diff] [blame] | 2374 | |
Willy Tarreau | 2c115e5 | 2013-12-11 19:41:16 +0100 | [diff] [blame] | 2375 | check->state &= ~CHK_ST_INPROGRESS; |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 2376 | check_notify_failure(check); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2377 | |
Krzysztof Piotr Oledzki | 5259dfe | 2008-01-21 01:54:06 +0100 | [diff] [blame] | 2378 | /* we allow up to min(inter, timeout.connect) for a connection |
| 2379 | * to establish but only when timeout.check is set |
| 2380 | * as it may be to short for a full check otherwise |
| 2381 | */ |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 2382 | while (tick_is_expired(t->expire, now_ms)) { |
| 2383 | int t_con; |
Krzysztof Piotr Oledzki | 5259dfe | 2008-01-21 01:54:06 +0100 | [diff] [blame] | 2384 | |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2385 | t_con = tick_add(t->expire, proxy->timeout.connect); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2386 | t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter)); |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2387 | if (proxy->timeout.check) |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 2388 | t->expire = tick_first(t->expire, t_con); |
Krzysztof Piotr Oledzki | 5259dfe | 2008-01-21 01:54:06 +0100 | [diff] [blame] | 2389 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2390 | } |
| 2391 | else { |
Willy Tarreau | f150317 | 2012-09-28 19:39:36 +0200 | [diff] [blame] | 2392 | /* there was a test running. |
| 2393 | * First, let's check whether there was an uncaught error, |
| 2394 | * which can happen on connect timeout or error. |
| 2395 | */ |
Simon Horman | ccaabcd | 2014-06-20 12:29:47 +0900 | [diff] [blame] | 2396 | if (check->result == CHK_RES_UNKNOWN) { |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 2397 | /* good connection is enough for pure TCP check */ |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 2398 | if (!(conn->flags & CO_FL_WAIT_XPRT) && !check->type) { |
Christopher Faulet | f61f33a | 2020-03-27 18:55:49 +0100 | [diff] [blame] | 2399 | if (check->use_ssl == 1) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2400 | set_server_check_status(check, HCHK_STATUS_L6OK, NULL); |
Willy Tarreau | f150317 | 2012-09-28 19:39:36 +0200 | [diff] [blame] | 2401 | else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2402 | set_server_check_status(check, HCHK_STATUS_L4OK, NULL); |
Willy Tarreau | acbdc7a | 2012-11-23 14:02:10 +0100 | [diff] [blame] | 2403 | } |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 2404 | else if ((conn->flags & CO_FL_ERROR) || cs->flags & CS_FL_ERROR || expired) { |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 2405 | chk_report_conn_err(check, 0, expired); |
Willy Tarreau | f150317 | 2012-09-28 19:39:36 +0200 | [diff] [blame] | 2406 | } |
Willy Tarreau | 74fa7fb | 2012-11-23 14:43:49 +0100 | [diff] [blame] | 2407 | else |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2408 | goto out_unlock; /* timeout not reached, wait again */ |
Willy Tarreau | f150317 | 2012-09-28 19:39:36 +0200 | [diff] [blame] | 2409 | } |
| 2410 | |
Willy Tarreau | 74fa7fb | 2012-11-23 14:43:49 +0100 | [diff] [blame] | 2411 | /* check complete or aborted */ |
Gaetan Rivet | 05d692d | 2020-02-14 17:42:54 +0100 | [diff] [blame] | 2412 | |
| 2413 | check->current_step = NULL; |
| 2414 | if (check->sess != NULL) { |
| 2415 | session_free(check->sess); |
| 2416 | check->sess = NULL; |
| 2417 | } |
| 2418 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2419 | if (conn && conn->xprt) { |
Willy Tarreau | 5ba04f6 | 2013-02-12 15:23:12 +0100 | [diff] [blame] | 2420 | /* The check was aborted and the connection was not yet closed. |
| 2421 | * This can happen upon timeout, or when an external event such |
| 2422 | * as a failed response coupled with "observe layer7" caused the |
| 2423 | * server state to be suddenly changed. |
| 2424 | */ |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 2425 | conn_sock_drain(conn); |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 2426 | cs_close(cs); |
Willy Tarreau | 5ba04f6 | 2013-02-12 15:23:12 +0100 | [diff] [blame] | 2427 | } |
| 2428 | |
Willy Tarreau | ac59f36 | 2017-10-08 11:10:19 +0200 | [diff] [blame] | 2429 | if (cs) { |
Olivier Houchard | 4906554 | 2019-05-31 19:20:36 +0200 | [diff] [blame] | 2430 | if (check->wait_list.events) |
| 2431 | cs->conn->xprt->unsubscribe(cs->conn, |
| 2432 | cs->conn->xprt_ctx, |
| 2433 | check->wait_list.events, |
| 2434 | &check->wait_list); |
| 2435 | /* We may have been scheduled to run, and the |
Willy Tarreau | 86eded6 | 2019-06-14 14:47:49 +0200 | [diff] [blame] | 2436 | * I/O handler expects to have a cs, so remove |
| 2437 | * the tasklet |
| 2438 | */ |
| 2439 | tasklet_remove_from_tasklet_list(check->wait_list.tasklet); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2440 | cs_destroy(cs); |
| 2441 | cs = check->cs = NULL; |
| 2442 | conn = NULL; |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2443 | } |
| 2444 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2445 | if (check->server) { |
| 2446 | if (check->result == CHK_RES_FAILED) { |
| 2447 | /* a failure or timeout detected */ |
| 2448 | check_notify_failure(check); |
| 2449 | } |
| 2450 | else if (check->result == CHK_RES_CONDPASS) { |
| 2451 | /* check is OK but asks for stopping mode */ |
| 2452 | check_notify_stopping(check); |
| 2453 | } |
| 2454 | else if (check->result == CHK_RES_PASSED) { |
| 2455 | /* a success was detected */ |
| 2456 | check_notify_success(check); |
| 2457 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2458 | } |
Christopher Faulet | 88ce5d1 | 2017-10-20 15:41:18 +0200 | [diff] [blame] | 2459 | task_set_affinity(t, MAX_THREADS_MASK); |
Willy Tarreau | 2c115e5 | 2013-12-11 19:41:16 +0100 | [diff] [blame] | 2460 | check->state &= ~CHK_ST_INPROGRESS; |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2461 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2462 | if (check->server) { |
| 2463 | rv = 0; |
| 2464 | if (global.spread_checks > 0) { |
| 2465 | rv = srv_getinter(check) * global.spread_checks / 100; |
Willy Tarreau | 5a6d3e7 | 2020-03-08 17:53:53 +0100 | [diff] [blame] | 2466 | rv -= (int) (2 * rv * (ha_random32() / 4294967295.0)); |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2467 | } |
| 2468 | t->expire = tick_add(now_ms, MS_TO_TICKS(srv_getinter(check) + rv)); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2469 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2470 | } |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2471 | |
| 2472 | reschedule: |
| 2473 | while (tick_is_expired(t->expire, now_ms)) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2474 | t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter)); |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2475 | out_unlock: |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2476 | if (check->server) |
| 2477 | HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock); |
Willy Tarreau | 26c2506 | 2009-03-08 09:38:41 +0100 | [diff] [blame] | 2478 | return t; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2479 | } |
| 2480 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2481 | /* |
| 2482 | * manages a server health-check. Returns |
| 2483 | * the time the task accepts to wait, or TIME_ETERNITY for infinity. |
| 2484 | */ |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2485 | static struct task *process_chk(struct task *t, void *context, unsigned short state) |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2486 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2487 | struct check *check = context; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2488 | |
| 2489 | if (check->type == PR_O2_EXT_CHK) |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2490 | return process_chk_proc(t, context, state); |
| 2491 | return process_chk_conn(t, context, state); |
Baptiste Assmann | a68ca96 | 2015-04-14 01:15:08 +0200 | [diff] [blame] | 2492 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2493 | } |
| 2494 | |
Simon Horman | 5c94242 | 2013-11-25 10:46:32 +0900 | [diff] [blame] | 2495 | static int start_check_task(struct check *check, int mininter, |
| 2496 | int nbcheck, int srvpos) |
| 2497 | { |
| 2498 | struct task *t; |
Willy Tarreau | 6dd4ac8 | 2019-09-03 18:55:02 +0200 | [diff] [blame] | 2499 | unsigned long thread_mask = MAX_THREADS_MASK; |
| 2500 | |
| 2501 | if (check->type == PR_O2_EXT_CHK) |
| 2502 | thread_mask = 1; |
| 2503 | |
Simon Horman | 5c94242 | 2013-11-25 10:46:32 +0900 | [diff] [blame] | 2504 | /* task for the check */ |
Willy Tarreau | 6dd4ac8 | 2019-09-03 18:55:02 +0200 | [diff] [blame] | 2505 | if ((t = task_new(thread_mask)) == NULL) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2506 | ha_alert("Starting [%s:%s] check: out of memory.\n", |
| 2507 | check->server->proxy->id, check->server->id); |
Simon Horman | 5c94242 | 2013-11-25 10:46:32 +0900 | [diff] [blame] | 2508 | return 0; |
| 2509 | } |
| 2510 | |
| 2511 | check->task = t; |
| 2512 | t->process = process_chk; |
| 2513 | t->context = check; |
| 2514 | |
Willy Tarreau | 1746eec | 2014-04-25 10:46:47 +0200 | [diff] [blame] | 2515 | if (mininter < srv_getinter(check)) |
| 2516 | mininter = srv_getinter(check); |
| 2517 | |
| 2518 | if (global.max_spread_checks && mininter > global.max_spread_checks) |
| 2519 | mininter = global.max_spread_checks; |
| 2520 | |
Simon Horman | 5c94242 | 2013-11-25 10:46:32 +0900 | [diff] [blame] | 2521 | /* check this every ms */ |
Willy Tarreau | 1746eec | 2014-04-25 10:46:47 +0200 | [diff] [blame] | 2522 | t->expire = tick_add(now_ms, MS_TO_TICKS(mininter * srvpos / nbcheck)); |
Simon Horman | 5c94242 | 2013-11-25 10:46:32 +0900 | [diff] [blame] | 2523 | check->start = now; |
| 2524 | task_queue(t); |
| 2525 | |
| 2526 | return 1; |
| 2527 | } |
| 2528 | |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2529 | /* |
| 2530 | * Start health-check. |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2531 | * Returns 0 if OK, ERR_FATAL on error, and prints the error in this case. |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2532 | */ |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2533 | static int start_checks() |
| 2534 | { |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2535 | |
| 2536 | struct proxy *px; |
| 2537 | struct server *s; |
| 2538 | struct task *t; |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2539 | int nbcheck=0, mininter=0, srvpos=0; |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2540 | |
Gaetan Rivet | 05d692d | 2020-02-14 17:42:54 +0100 | [diff] [blame] | 2541 | /* 0- init the dummy frontend used to create all checks sessions */ |
| 2542 | init_new_proxy(&checks_fe); |
| 2543 | checks_fe.cap = PR_CAP_FE | PR_CAP_BE; |
| 2544 | checks_fe.mode = PR_MODE_TCP; |
| 2545 | checks_fe.maxconn = 0; |
| 2546 | checks_fe.conn_retries = CONN_RETRIES; |
| 2547 | checks_fe.options2 |= PR_O2_INDEPSTR | PR_O2_SMARTCON | PR_O2_SMARTACC; |
| 2548 | checks_fe.timeout.client = TICK_ETERNITY; |
| 2549 | |
Willy Tarreau | 2c43a1e | 2007-10-14 23:05:39 +0200 | [diff] [blame] | 2550 | /* 1- count the checkers to run simultaneously. |
| 2551 | * We also determine the minimum interval among all of those which |
| 2552 | * have an interval larger than SRV_CHK_INTER_THRES. This interval |
| 2553 | * will be used to spread their start-up date. Those which have |
Jamie Gloudon | 801a0a3 | 2012-08-25 00:18:33 -0400 | [diff] [blame] | 2554 | * a shorter interval will start independently and will not dictate |
Willy Tarreau | 2c43a1e | 2007-10-14 23:05:39 +0200 | [diff] [blame] | 2555 | * too short an interval for all others. |
| 2556 | */ |
Olivier Houchard | fbc74e8 | 2017-11-24 16:54:05 +0100 | [diff] [blame] | 2557 | for (px = proxies_list; px; px = px->next) { |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2558 | for (s = px->srv; s; s = s->next) { |
Willy Tarreau | e7b7348 | 2013-11-21 11:50:50 +0100 | [diff] [blame] | 2559 | if (s->slowstart) { |
Emeric Brun | c60def8 | 2017-09-27 14:59:38 +0200 | [diff] [blame] | 2560 | if ((t = task_new(MAX_THREADS_MASK)) == NULL) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2561 | ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id); |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2562 | return ERR_ALERT | ERR_FATAL; |
Willy Tarreau | e7b7348 | 2013-11-21 11:50:50 +0100 | [diff] [blame] | 2563 | } |
| 2564 | /* We need a warmup task that will be called when the server |
| 2565 | * state switches from down to up. |
| 2566 | */ |
| 2567 | s->warmup = t; |
| 2568 | t->process = server_warmup; |
| 2569 | t->context = s; |
Baptiste Assmann | 6076d1c | 2015-09-17 22:53:59 +0200 | [diff] [blame] | 2570 | /* server can be in this state only because of */ |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 2571 | if (s->next_state == SRV_ST_STARTING) |
Baptiste Assmann | 6076d1c | 2015-09-17 22:53:59 +0200 | [diff] [blame] | 2572 | task_schedule(s->warmup, tick_add(now_ms, MS_TO_TICKS(MAX(1000, (now.tv_sec - s->last_change)) / 20))); |
Willy Tarreau | e7b7348 | 2013-11-21 11:50:50 +0100 | [diff] [blame] | 2573 | } |
| 2574 | |
Willy Tarreau | d8514a2 | 2013-12-11 21:10:14 +0100 | [diff] [blame] | 2575 | if (s->check.state & CHK_ST_CONFIGURED) { |
| 2576 | nbcheck++; |
| 2577 | if ((srv_getinter(&s->check) >= SRV_CHK_INTER_THRES) && |
| 2578 | (!mininter || mininter > srv_getinter(&s->check))) |
| 2579 | mininter = srv_getinter(&s->check); |
| 2580 | } |
Willy Tarreau | 15f3910 | 2013-12-11 20:41:18 +0100 | [diff] [blame] | 2581 | |
Willy Tarreau | d8514a2 | 2013-12-11 21:10:14 +0100 | [diff] [blame] | 2582 | if (s->agent.state & CHK_ST_CONFIGURED) { |
| 2583 | nbcheck++; |
| 2584 | if ((srv_getinter(&s->agent) >= SRV_CHK_INTER_THRES) && |
| 2585 | (!mininter || mininter > srv_getinter(&s->agent))) |
| 2586 | mininter = srv_getinter(&s->agent); |
| 2587 | } |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2588 | } |
| 2589 | } |
| 2590 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2591 | if (!nbcheck) |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2592 | return 0; |
| 2593 | |
| 2594 | srand((unsigned)time(NULL)); |
| 2595 | |
| 2596 | /* |
| 2597 | * 2- start them as far as possible from each others. For this, we will |
| 2598 | * start them after their interval set to the min interval divided by |
| 2599 | * the number of servers, weighted by the server's position in the list. |
| 2600 | */ |
Olivier Houchard | fbc74e8 | 2017-11-24 16:54:05 +0100 | [diff] [blame] | 2601 | for (px = proxies_list; px; px = px->next) { |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2602 | if ((px->options2 & PR_O2_CHK_ANY) == PR_O2_EXT_CHK) { |
| 2603 | if (init_pid_list()) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2604 | ha_alert("Starting [%s] check: out of memory.\n", px->id); |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2605 | return ERR_ALERT | ERR_FATAL; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2606 | } |
| 2607 | } |
| 2608 | |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2609 | for (s = px->srv; s; s = s->next) { |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2610 | /* A task for the main check */ |
Willy Tarreau | ff5ae35 | 2013-12-11 20:36:34 +0100 | [diff] [blame] | 2611 | if (s->check.state & CHK_ST_CONFIGURED) { |
Cyril Bonté | 99c5bf5 | 2014-08-07 01:55:38 +0200 | [diff] [blame] | 2612 | if (s->check.type == PR_O2_EXT_CHK) { |
| 2613 | if (!prepare_external_check(&s->check)) |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2614 | return ERR_ALERT | ERR_FATAL; |
Cyril Bonté | 99c5bf5 | 2014-08-07 01:55:38 +0200 | [diff] [blame] | 2615 | } |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2616 | if (!start_check_task(&s->check, mininter, nbcheck, srvpos)) |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2617 | return ERR_ALERT | ERR_FATAL; |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2618 | srvpos++; |
| 2619 | } |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2620 | |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2621 | /* A task for a auxiliary agent check */ |
Willy Tarreau | ff5ae35 | 2013-12-11 20:36:34 +0100 | [diff] [blame] | 2622 | if (s->agent.state & CHK_ST_CONFIGURED) { |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2623 | if (!start_check_task(&s->agent, mininter, nbcheck, srvpos)) { |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2624 | return ERR_ALERT | ERR_FATAL; |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2625 | } |
| 2626 | srvpos++; |
| 2627 | } |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2628 | } |
| 2629 | } |
| 2630 | return 0; |
| 2631 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2632 | |
| 2633 | /* |
Willy Tarreau | 5b3a202 | 2012-09-28 15:01:02 +0200 | [diff] [blame] | 2634 | * Perform content verification check on data in s->check.buffer buffer. |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2635 | * The buffer MUST be terminated by a null byte before calling this function. |
| 2636 | * Sets server status appropriately. The caller is responsible for ensuring |
| 2637 | * that the buffer contains at least 13 characters. If <done> is zero, we may |
| 2638 | * return 0 to indicate that data is required to decide of a match. |
| 2639 | */ |
| 2640 | static int httpchk_expect(struct server *s, int done) |
| 2641 | { |
Christopher Faulet | 1bc04c7 | 2017-10-29 20:14:08 +0100 | [diff] [blame] | 2642 | static THREAD_LOCAL char status_msg[] = "HTTP status check returned code <000>"; |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2643 | char status_code[] = "000"; |
| 2644 | char *contentptr; |
| 2645 | int crlf; |
| 2646 | int ret; |
| 2647 | |
| 2648 | switch (s->proxy->options2 & PR_O2_EXP_TYPE) { |
| 2649 | case PR_O2_EXP_STS: |
| 2650 | case PR_O2_EXP_RSTS: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2651 | memcpy(status_code, b_head(&s->check.bi) + 9, 3); |
| 2652 | memcpy(status_msg + strlen(status_msg) - 4, b_head(&s->check.bi) + 9, 3); |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2653 | |
| 2654 | if ((s->proxy->options2 & PR_O2_EXP_TYPE) == PR_O2_EXP_STS) |
| 2655 | ret = strncmp(s->proxy->expect_str, status_code, 3) == 0; |
| 2656 | else |
Thierry FOURNIER | 09af0d6 | 2014-06-18 11:35:54 +0200 | [diff] [blame] | 2657 | ret = regex_exec(s->proxy->expect_regex, status_code); |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2658 | |
| 2659 | /* we necessarily have the response, so there are no partial failures */ |
| 2660 | if (s->proxy->options2 & PR_O2_EXP_INV) |
| 2661 | ret = !ret; |
| 2662 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2663 | set_server_check_status(&s->check, ret ? HCHK_STATUS_L7OKD : HCHK_STATUS_L7STS, status_msg); |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2664 | break; |
| 2665 | |
| 2666 | case PR_O2_EXP_STR: |
| 2667 | case PR_O2_EXP_RSTR: |
| 2668 | /* very simple response parser: ignore CR and only count consecutive LFs, |
| 2669 | * stop with contentptr pointing to first char after the double CRLF or |
| 2670 | * to '\0' if crlf < 2. |
| 2671 | */ |
| 2672 | crlf = 0; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2673 | for (contentptr = b_head(&s->check.bi); *contentptr; contentptr++) { |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2674 | if (crlf >= 2) |
| 2675 | break; |
| 2676 | if (*contentptr == '\r') |
| 2677 | continue; |
| 2678 | else if (*contentptr == '\n') |
| 2679 | crlf++; |
| 2680 | else |
| 2681 | crlf = 0; |
| 2682 | } |
| 2683 | |
| 2684 | /* Check that response contains a body... */ |
| 2685 | if (crlf < 2) { |
| 2686 | if (!done) |
| 2687 | return 0; |
| 2688 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2689 | set_server_check_status(&s->check, HCHK_STATUS_L7RSP, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2690 | "HTTP content check could not find a response body"); |
| 2691 | return 1; |
| 2692 | } |
| 2693 | |
| 2694 | /* Check that response body is not empty... */ |
| 2695 | if (*contentptr == '\0') { |
Willy Tarreau | a164fb5 | 2011-04-13 09:32:41 +0200 | [diff] [blame] | 2696 | if (!done) |
| 2697 | return 0; |
| 2698 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2699 | set_server_check_status(&s->check, HCHK_STATUS_L7RSP, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2700 | "HTTP content check found empty response body"); |
| 2701 | return 1; |
| 2702 | } |
| 2703 | |
| 2704 | /* Check the response content against the supplied string |
| 2705 | * or regex... */ |
| 2706 | if ((s->proxy->options2 & PR_O2_EXP_TYPE) == PR_O2_EXP_STR) |
| 2707 | ret = strstr(contentptr, s->proxy->expect_str) != NULL; |
| 2708 | else |
Thierry FOURNIER | 09af0d6 | 2014-06-18 11:35:54 +0200 | [diff] [blame] | 2709 | ret = regex_exec(s->proxy->expect_regex, contentptr); |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2710 | |
| 2711 | /* if we don't match, we may need to wait more */ |
| 2712 | if (!ret && !done) |
| 2713 | return 0; |
| 2714 | |
| 2715 | if (ret) { |
| 2716 | /* content matched */ |
| 2717 | if (s->proxy->options2 & PR_O2_EXP_INV) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2718 | set_server_check_status(&s->check, HCHK_STATUS_L7RSP, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2719 | "HTTP check matched unwanted content"); |
| 2720 | else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2721 | set_server_check_status(&s->check, HCHK_STATUS_L7OKD, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2722 | "HTTP content check matched"); |
| 2723 | } |
| 2724 | else { |
| 2725 | if (s->proxy->options2 & PR_O2_EXP_INV) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2726 | set_server_check_status(&s->check, HCHK_STATUS_L7OKD, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2727 | "HTTP check did not match unwanted content"); |
| 2728 | else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2729 | set_server_check_status(&s->check, HCHK_STATUS_L7RSP, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2730 | "HTTP content check did not match"); |
| 2731 | } |
| 2732 | break; |
| 2733 | } |
| 2734 | return 1; |
| 2735 | } |
| 2736 | |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2737 | /* |
| 2738 | * return the id of a step in a send/expect session |
| 2739 | */ |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2740 | static int tcpcheck_get_step_id(struct check *check, struct tcpcheck_rule *rule) |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2741 | { |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2742 | if (!rule) |
| 2743 | rule = check->current_step; |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 2744 | |
Christopher Faulet | 3c29aa6 | 2020-03-24 13:31:19 +0100 | [diff] [blame] | 2745 | /* no last started step => first step */ |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2746 | if (!rule) |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2747 | return 1; |
| 2748 | |
Christopher Faulet | a202d1d | 2020-03-26 17:38:49 +0100 | [diff] [blame] | 2749 | /* last step is the first implicit connect */ |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2750 | if (rule->index == 0 && |
| 2751 | rule->action == TCPCHK_ACT_CONNECT && |
| 2752 | (rule->connect.options & TCPCHK_OPT_DEFAULT_CONNECT)) |
Christopher Faulet | a202d1d | 2020-03-26 17:38:49 +0100 | [diff] [blame] | 2753 | return 0; |
| 2754 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2755 | return rule->index + 1; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2756 | } |
| 2757 | |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2758 | /* |
Christopher Faulet | 3c29aa6 | 2020-03-24 13:31:19 +0100 | [diff] [blame] | 2759 | * return the latest known comment for the current rule, the comment attached to |
| 2760 | * it or the COMMENT rule immediately preceedding the expect rule chain, if any. |
| 2761 | * returns NULL if no comment found. |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2762 | */ |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2763 | static char *tcpcheck_get_step_comment(struct check *check, struct tcpcheck_rule *rule) |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2764 | { |
Christopher Faulet | 3c29aa6 | 2020-03-24 13:31:19 +0100 | [diff] [blame] | 2765 | struct tcpcheck_rule *cur; |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2766 | char *ret = NULL; |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2767 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2768 | if (!rule) |
| 2769 | rule = check->current_step; |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2770 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2771 | if (rule->comment) { |
| 2772 | ret = rule->comment; |
Christopher Faulet | 3c29aa6 | 2020-03-24 13:31:19 +0100 | [diff] [blame] | 2773 | goto return_comment; |
| 2774 | } |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2775 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2776 | rule = LIST_PREV(&rule->list, typeof(cur), list); |
| 2777 | list_for_each_entry_from_rev(rule, check->tcpcheck_rules, list) { |
| 2778 | if (rule->action == TCPCHK_ACT_COMMENT) { |
| 2779 | ret = rule->comment; |
Christopher Faulet | 3c29aa6 | 2020-03-24 13:31:19 +0100 | [diff] [blame] | 2780 | break; |
| 2781 | } |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2782 | else if (rule->action != TCPCHK_ACT_EXPECT) |
Christopher Faulet | 3c29aa6 | 2020-03-24 13:31:19 +0100 | [diff] [blame] | 2783 | break; |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2784 | } |
| 2785 | |
| 2786 | return_comment: |
| 2787 | return ret; |
| 2788 | } |
| 2789 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2790 | enum tcpcheck_eval_ret { |
| 2791 | TCPCHK_EVAL_WAIT = 0, |
| 2792 | TCPCHK_EVAL_STOP, |
| 2793 | TCPCHK_EVAL_CONTINUE, |
| 2794 | }; |
| 2795 | |
| 2796 | /* Evaluate a TCPCHK_ACT_CONNECT rule. It returns 1 to evaluate the next rule, 0 |
| 2797 | * to wait and -1 to stop the check. */ |
| 2798 | static enum tcpcheck_eval_ret tcpcheck_eval_connect(struct check *check, struct tcpcheck_rule *rule) |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2799 | { |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2800 | enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE; |
| 2801 | struct tcpcheck_connect *connect = &rule->connect; |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2802 | struct proxy *proxy = check->proxy; |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2803 | struct server *s = check->server; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2804 | struct task *t = check->task; |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2805 | struct conn_stream *cs; |
| 2806 | struct connection *conn = NULL; |
| 2807 | struct protocol *proto; |
| 2808 | struct xprt_ops *xprt; |
Gaetan Rivet | efab6c6 | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 2809 | char *comment; |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2810 | int status; |
Willy Tarreau | ef95395 | 2014-10-02 14:30:14 +0200 | [diff] [blame] | 2811 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2812 | /* For a connect action we'll create a new connection. We may also have |
| 2813 | * to kill a previous one. But we don't want to leave *without* a |
| 2814 | * connection if we came here from the connection layer, hence with a |
| 2815 | * connection. Thus we'll proceed in the following order : |
| 2816 | * 1: close but not release previous connection (handled by the caller) |
| 2817 | * 2: try to get a new connection |
| 2818 | * 3: release and replace the old one on success |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2819 | */ |
Willy Tarreau | 449f952 | 2015-05-13 15:39:48 +0200 | [diff] [blame] | 2820 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2821 | /* 2- prepare new connection */ |
| 2822 | cs = cs_new(NULL); |
| 2823 | if (!cs) { |
| 2824 | chunk_printf(&trash, "TCPCHK error allocating connection at step %d", |
| 2825 | tcpcheck_get_step_id(check, rule)); |
| 2826 | comment = tcpcheck_get_step_comment(check, rule); |
| 2827 | if (comment) |
| 2828 | chunk_appendf(&trash, " comment: '%s'", comment); |
| 2829 | set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area); |
| 2830 | ret = TCPCHK_EVAL_STOP; |
Christopher Faulet | b610285 | 2017-11-28 10:06:29 +0100 | [diff] [blame] | 2831 | goto out; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2832 | } |
| 2833 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2834 | /* 3- release and replace the old one on success */ |
| 2835 | if (check->cs) { |
| 2836 | if (check->wait_list.events) |
| 2837 | cs->conn->xprt->unsubscribe(cs->conn, cs->conn->xprt_ctx, |
| 2838 | check->wait_list.events, &check->wait_list); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2839 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2840 | /* We may have been scheduled to run, and the I/O handler |
| 2841 | * expects to have a cs, so remove the tasklet |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 2842 | */ |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2843 | tasklet_remove_from_tasklet_list(check->wait_list.tasklet); |
| 2844 | cs_destroy(check->cs); |
| 2845 | } |
Willy Tarreau | deccd11 | 2018-06-14 18:38:55 +0200 | [diff] [blame] | 2846 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2847 | tasklet_set_tid(check->wait_list.tasklet, tid); |
Willy Tarreau | abca5b6 | 2013-12-06 14:19:25 +0100 | [diff] [blame] | 2848 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2849 | check->cs = cs; |
| 2850 | conn = cs->conn; |
Willy Tarreau | abca5b6 | 2013-12-06 14:19:25 +0100 | [diff] [blame] | 2851 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2852 | /* Maybe there were an older connection we were waiting on */ |
| 2853 | check->wait_list.events = 0; |
| 2854 | conn->target = s ? &s->obj_type : &proxy->obj_type; |
Willy Tarreau | f3d3482 | 2014-12-08 12:11:28 +0100 | [diff] [blame] | 2855 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2856 | /* no client address */ |
| 2857 | if (!sockaddr_alloc(&conn->dst)) { |
| 2858 | status = SF_ERR_RESOURCE; |
| 2859 | goto fail_check; |
| 2860 | } |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2861 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2862 | /* connect to the check addr if specified on the server. otherwise, use |
| 2863 | * the server addr |
| 2864 | */ |
| 2865 | *conn->dst = (is_addr(&check->addr) ? check->addr : s->addr); |
| 2866 | proto = protocol_by_family(conn->dst->ss_family); |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2867 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2868 | if (connect->port) |
| 2869 | set_host_port(conn->dst, connect->port); |
| 2870 | else if (check->port) |
| 2871 | set_host_port(conn->dst, check->port); |
| 2872 | else { |
| 2873 | int i = get_host_port(&check->addr); |
| 2874 | set_host_port(conn->dst, ((i > 0) ? i : s->svc_port)); |
| 2875 | } |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2876 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2877 | xprt = ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) |
| 2878 | ? check->xprt |
| 2879 | : ((connect->options & TCPCHK_OPT_SSL) ? xprt_get(XPRT_SSL) : xprt_get(XPRT_RAW))); |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2880 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2881 | conn_prepare(conn, proto, xprt); |
Gaetan Rivet | 05d692d | 2020-02-14 17:42:54 +0100 | [diff] [blame] | 2882 | if (conn_install_mux(conn, &mux_pt_ops, cs, proxy, check->sess) < 0) { |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2883 | status = SF_ERR_RESOURCE; |
| 2884 | goto fail_check; |
| 2885 | } |
| 2886 | cs_attach(cs, check, &check_conn_cb); |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2887 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2888 | status = SF_ERR_INTERNAL; |
| 2889 | if (proto && proto->connect) { |
| 2890 | struct tcpcheck_rule *next; |
| 2891 | int flags = CONNECT_HAS_DATA; |
Olivier Houchard | ff1e9f3 | 2019-09-20 17:18:35 +0200 | [diff] [blame] | 2892 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2893 | next = get_next_tcpcheck_rule(check->tcpcheck_rules, rule); |
| 2894 | if (!next || next->action != TCPCHK_ACT_EXPECT) |
| 2895 | flags |= CONNECT_DELACK_ALWAYS; |
| 2896 | status = proto->connect(conn, flags); |
| 2897 | } |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2898 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2899 | if (connect->options & TCPCHK_OPT_DEFAULT_CONNECT) { |
| 2900 | #ifdef USE_OPENSSL |
| 2901 | if (status == SF_ERR_NONE) { |
| 2902 | if (s->check.sni) |
| 2903 | ssl_sock_set_servername(conn, s->check.sni); |
| 2904 | if (s->check.alpn_str) |
| 2905 | ssl_sock_set_alpn(conn, (unsigned char *)s->check.alpn_str, |
| 2906 | s->check.alpn_len); |
| 2907 | } |
| 2908 | #endif |
| 2909 | if (s->check.via_socks4 && (s->flags & SRV_F_SOCKS4_PROXY)) { |
| 2910 | conn->send_proxy_ofs = 1; |
| 2911 | conn->flags |= CO_FL_SOCKS4; |
| 2912 | } |
| 2913 | if (s->check.send_proxy && !(check->state & CHK_ST_AGENT)) { |
| 2914 | conn->send_proxy_ofs = 1; |
| 2915 | conn->flags |= CO_FL_SEND_PROXY; |
| 2916 | } |
| 2917 | } |
| 2918 | else { |
| 2919 | /* TODO: add support for sock4 and sni option */ |
| 2920 | if (connect->options & TCPCHK_OPT_SEND_PROXY) { |
| 2921 | conn->send_proxy_ofs = 1; |
| 2922 | conn->flags |= CO_FL_SEND_PROXY; |
| 2923 | } |
| 2924 | if (conn_ctrl_ready(conn) && (connect->options & TCPCHK_OPT_LINGER)) { |
| 2925 | /* Some servers don't like reset on close */ |
| 2926 | fdtab[cs->conn->handle.fd].linger_risk = 0; |
| 2927 | } |
| 2928 | } |
Willy Tarreau | ca79f59 | 2019-07-17 19:04:47 +0200 | [diff] [blame] | 2929 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2930 | if (conn_ctrl_ready(conn) && (conn->flags & (CO_FL_SEND_PROXY | CO_FL_SOCKS4))) { |
| 2931 | if (xprt_add_hs(conn) < 0) |
| 2932 | status = SF_ERR_RESOURCE; |
| 2933 | } |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2934 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2935 | fail_check: |
| 2936 | /* It can return one of : |
| 2937 | * - SF_ERR_NONE if everything's OK |
| 2938 | * - SF_ERR_SRVTO if there are no more servers |
| 2939 | * - SF_ERR_SRVCL if the connection was refused by the server |
| 2940 | * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn) |
| 2941 | * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...) |
| 2942 | * - SF_ERR_INTERNAL for any other purely internal errors |
| 2943 | * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted. |
| 2944 | * Note that we try to prevent the network stack from sending the ACK during the |
| 2945 | * connect() when a pure TCP check is used (without PROXY protocol). |
| 2946 | */ |
| 2947 | switch (status) { |
| 2948 | case SF_ERR_NONE: |
| 2949 | /* we allow up to min(inter, timeout.connect) for a connection |
| 2950 | * to establish but only when timeout.check is set as it may be |
| 2951 | * to short for a full check otherwise |
| 2952 | */ |
| 2953 | t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter)); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2954 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2955 | if (proxy->timeout.check && proxy->timeout.connect) { |
| 2956 | int t_con = tick_add(now_ms, proxy->timeout.connect); |
| 2957 | t->expire = tick_first(t->expire, t_con); |
| 2958 | } |
| 2959 | break; |
| 2960 | case SF_ERR_SRVTO: /* ETIMEDOUT */ |
| 2961 | case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */ |
| 2962 | chunk_printf(&trash, "TCPCHK error establishing connection at step %d: %s", |
| 2963 | tcpcheck_get_step_id(check, rule), strerror(errno)); |
| 2964 | comment = tcpcheck_get_step_comment(check, rule); |
| 2965 | if (comment) |
| 2966 | chunk_appendf(&trash, " comment: '%s'", comment); |
| 2967 | set_server_check_status(check, HCHK_STATUS_L4CON, trash.area); |
| 2968 | ret = TCPCHK_EVAL_STOP; |
| 2969 | goto out; |
| 2970 | case SF_ERR_PRXCOND: |
| 2971 | case SF_ERR_RESOURCE: |
| 2972 | case SF_ERR_INTERNAL: |
| 2973 | chunk_printf(&trash, "TCPCHK error establishing connection at step %d", |
| 2974 | tcpcheck_get_step_id(check, rule)); |
| 2975 | comment = tcpcheck_get_step_comment(check, rule); |
| 2976 | if (comment) |
| 2977 | chunk_appendf(&trash, " comment: '%s'", comment); |
| 2978 | set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area); |
| 2979 | ret = TCPCHK_EVAL_STOP; |
| 2980 | goto out; |
| 2981 | } |
Christopher Faulet | a202d1d | 2020-03-26 17:38:49 +0100 | [diff] [blame] | 2982 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2983 | /* don't do anything until the connection is established */ |
| 2984 | if (conn->flags & CO_FL_WAIT_XPRT) { |
| 2985 | ret = TCPCHK_EVAL_WAIT; |
| 2986 | goto out; |
| 2987 | } |
Willy Tarreau | be37315 | 2018-09-06 11:45:30 +0200 | [diff] [blame] | 2988 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2989 | out: |
| 2990 | if (conn && check->result == CHK_RES_FAILED) |
| 2991 | conn->flags |= CO_FL_ERROR; |
| 2992 | return ret; |
| 2993 | } |
Willy Tarreau | 2ab5c38 | 2019-07-17 18:48:07 +0200 | [diff] [blame] | 2994 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 2995 | /* Evaluate a TCPCHK_ACT_SEND rule. It returns 1 to evaluate the next rule, 0 |
| 2996 | * to wait and -1 to stop the check. */ |
| 2997 | static enum tcpcheck_eval_ret tcpcheck_eval_send(struct check *check, struct tcpcheck_rule *rule) |
| 2998 | { |
| 2999 | enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE; |
| 3000 | struct tcpcheck_send *send = &rule->send; |
| 3001 | struct conn_stream *cs = check->cs; |
| 3002 | struct connection *conn = cs_conn(cs); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3003 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3004 | /* reset the read & write buffer */ |
| 3005 | b_reset(&check->bi); |
| 3006 | b_reset(&check->bo); |
Gaetan Rivet | 08fdcb3 | 2020-02-28 11:04:21 +0100 | [diff] [blame] | 3007 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3008 | if (send->length >= b_size(&check->bo)) { |
| 3009 | chunk_printf(&trash, "tcp-check send : string too large (%d) for buffer size (%u) at step %d", |
| 3010 | send->length, (unsigned int)b_size(&check->bo), |
| 3011 | tcpcheck_get_step_id(check, rule)); |
| 3012 | set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area); |
| 3013 | ret = TCPCHK_EVAL_STOP; |
| 3014 | goto out; |
| 3015 | } |
Christopher Faulet | a202d1d | 2020-03-26 17:38:49 +0100 | [diff] [blame] | 3016 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3017 | switch (send->type) { |
| 3018 | case TCPCHK_SEND_STRING: |
| 3019 | case TCPCHK_SEND_BINARY: |
| 3020 | b_putblk(&check->bo, send->string, send->length); |
| 3021 | break; |
| 3022 | case TCPCHK_SEND_UNDEF: |
| 3023 | /* Should never happen. */ |
| 3024 | ret = TCPCHK_EVAL_STOP; |
| 3025 | goto out; |
| 3026 | }; |
Christopher Faulet | a202d1d | 2020-03-26 17:38:49 +0100 | [diff] [blame] | 3027 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3028 | if (conn->mux->snd_buf(cs, &check->bo, b_data(&check->bo), 0) <= 0) { |
| 3029 | ret = TCPCHK_EVAL_WAIT; |
| 3030 | if ((conn->flags & CO_FL_ERROR) || (cs->flags & CS_FL_ERROR)) |
| 3031 | ret = TCPCHK_EVAL_STOP; |
| 3032 | goto out; |
| 3033 | } |
| 3034 | if (b_data(&check->bo)) { |
| 3035 | cs->conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list); |
| 3036 | ret = TCPCHK_EVAL_WAIT; |
| 3037 | goto out; |
| 3038 | } |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3039 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3040 | out: |
| 3041 | return ret; |
| 3042 | } |
Gaetan Rivet | f8ba677 | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3043 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3044 | /* Evaluate a TCPCHK_ACT_EXPECT rule. It returns 1 to evaluate the next rule, 0 |
Gaetan Rivet | 0c39ecc | 2020-02-24 17:34:11 +0100 | [diff] [blame^] | 3045 | * to wait and -1 to stop the check. |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3046 | */ |
| 3047 | static enum tcpcheck_eval_ret tcpcheck_eval_expect(struct check *check, struct tcpcheck_rule *rule, int last_read) |
| 3048 | { |
| 3049 | enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE; |
| 3050 | struct tcpcheck_expect *expect = &check->current_step->expect; |
| 3051 | char *comment, *diag; |
| 3052 | int match; |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3053 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3054 | /* The current expect might need more data than the previous one, check again |
| 3055 | * that the minimum amount data required to match is respected. |
| 3056 | */ |
| 3057 | if (!last_read) { |
| 3058 | if ((expect->type == TCPCHK_EXPECT_STRING || expect->type == TCPCHK_EXPECT_BINARY) && |
| 3059 | (b_data(&check->bi) < expect->length)) { |
| 3060 | ret = TCPCHK_EVAL_WAIT; |
| 3061 | goto out; |
| 3062 | } |
| 3063 | if (expect->min_recv > 0 && (b_data(&check->bi) < expect->min_recv)) { |
| 3064 | ret = TCPCHK_EVAL_WAIT; |
| 3065 | goto out; |
| 3066 | } |
| 3067 | } |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3068 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3069 | /* Make GCC happy ; initialize match to a failure state. */ |
| 3070 | match = expect->inverse; |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3071 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3072 | switch (expect->type) { |
| 3073 | case TCPCHK_EXPECT_STRING: |
| 3074 | case TCPCHK_EXPECT_BINARY: |
| 3075 | match = my_memmem(b_head(&check->bi), b_data(&check->bi), expect->string, expect->length) != NULL; |
| 3076 | break; |
| 3077 | case TCPCHK_EXPECT_REGEX: |
| 3078 | if (expect->with_capture) |
| 3079 | match = regex_exec_match2(expect->regex, b_head(&check->bi), MIN(b_data(&check->bi), b_size(&check->bi)-1), |
| 3080 | MAX_MATCH, pmatch, 0); |
| 3081 | else |
| 3082 | match = regex_exec2(expect->regex, b_head(&check->bi), MIN(b_data(&check->bi), b_size(&check->bi)-1)); |
| 3083 | break; |
Willy Tarreau | 7df8ca6 | 2019-07-15 10:57:51 +0200 | [diff] [blame] | 3084 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3085 | case TCPCHK_EXPECT_REGEX_BINARY: |
| 3086 | chunk_reset(&trash); |
| 3087 | dump_binary(&trash, b_head(&check->bi), b_data(&check->bi)); |
| 3088 | if (expect->with_capture) |
| 3089 | match = regex_exec_match2(expect->regex, b_head(&trash), MIN(b_data(&trash), b_size(&trash)-1), |
| 3090 | MAX_MATCH, pmatch, 0); |
| 3091 | else |
| 3092 | match = regex_exec2(expect->regex, b_head(&trash), MIN(b_data(&trash), b_size(&trash)-1)); |
| 3093 | break; |
| 3094 | case TCPCHK_EXPECT_UNDEF: |
| 3095 | /* Should never happen. */ |
| 3096 | ret = TCPCHK_EVAL_STOP; |
| 3097 | goto out; |
| 3098 | } |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3099 | |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3100 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3101 | /* Wait for more data on mismatch only if no minimum is defined (-1), |
| 3102 | * otherwise the absence of match is already conclusive. |
| 3103 | */ |
| 3104 | if (!match && !last_read && (expect->min_recv == -1)) { |
| 3105 | ret = TCPCHK_EVAL_WAIT; |
| 3106 | goto out; |
| 3107 | } |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3108 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3109 | /* Result as expected, next rule. */ |
| 3110 | if (match ^ expect->inverse) |
| 3111 | goto out; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3112 | |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 3113 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3114 | /* From this point on, we matched something we did not want, this is an error state. */ |
| 3115 | ret = TCPCHK_EVAL_STOP; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3116 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3117 | diag = match ? "matched unwanted content" : "did not match content"; |
| 3118 | switch (expect->type) { |
| 3119 | case TCPCHK_EXPECT_STRING: |
| 3120 | chunk_printf(&trash, "TCPCHK %s '%s' at step %d", |
| 3121 | diag, expect->string, tcpcheck_get_step_id(check, rule)); |
| 3122 | break; |
| 3123 | case TCPCHK_EXPECT_BINARY: |
| 3124 | chunk_printf(&trash, "TCPCHK %s (binary) at step %d", |
| 3125 | diag, tcpcheck_get_step_id(check, rule)); |
| 3126 | break; |
| 3127 | case TCPCHK_EXPECT_REGEX: |
| 3128 | chunk_printf(&trash, "TCPCHK %s (regex) at step %d", |
| 3129 | diag, tcpcheck_get_step_id(check, rule)); |
| 3130 | break; |
| 3131 | case TCPCHK_EXPECT_REGEX_BINARY: |
| 3132 | chunk_printf(&trash, "TCPCHK %s (binary regex) at step %d", |
| 3133 | diag, tcpcheck_get_step_id(check, rule)); |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3134 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3135 | /* If references to the matched text were made, divide the |
| 3136 | * offsets by 2 to match offset of the original response buffer. |
| 3137 | */ |
| 3138 | if (expect->with_capture) { |
| 3139 | int i; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3140 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3141 | for (i = 1; i < MAX_MATCH && pmatch[i].rm_so != -1; i++) { |
| 3142 | pmatch[i].rm_so /= 2; /* at first matched char. */ |
| 3143 | pmatch[i].rm_eo /= 2; /* at last matched char. */ |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3144 | } |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3145 | } |
| 3146 | break; |
| 3147 | case TCPCHK_EXPECT_UNDEF: |
| 3148 | /* Should never happen. */ |
| 3149 | goto out; |
| 3150 | } |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3151 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3152 | comment = tcpcheck_get_step_comment(check, rule); |
| 3153 | if (comment) { |
| 3154 | if (expect->with_capture) { |
| 3155 | ret = exp_replace(b_tail(&trash), b_room(&trash), b_head(&check->bi), comment, pmatch); |
| 3156 | if (ret > 0) /* ignore comment if too large */ |
| 3157 | trash.data += ret; |
| 3158 | } |
| 3159 | else |
| 3160 | chunk_appendf(&trash, " comment: '%s'", comment); |
| 3161 | } |
| 3162 | set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area); |
| 3163 | ret = TCPCHK_EVAL_STOP; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3164 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3165 | out: |
| 3166 | return ret; |
| 3167 | } |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3168 | |
Gaetan Rivet | 0c39ecc | 2020-02-24 17:34:11 +0100 | [diff] [blame^] | 3169 | /* Evaluate a TCPCHK_ACT_ACTION_KW rule. It returns 1 to evaluate the next rule, 0 |
| 3170 | * to wait and -1 to stop the check. |
| 3171 | */ |
| 3172 | static enum tcpcheck_eval_ret tcpcheck_eval_action_kw(struct check *check, struct tcpcheck_rule *rule) |
| 3173 | { |
| 3174 | enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE; |
| 3175 | struct act_rule *act_rule; |
| 3176 | enum act_return act_ret; |
| 3177 | |
| 3178 | act_rule =rule->action_kw.rule; |
| 3179 | act_ret = act_rule->action_ptr(act_rule, check->proxy, check->sess, NULL, 0); |
| 3180 | if (act_ret != ACT_RET_CONT) { |
| 3181 | chunk_printf(&trash, "TCPCHK ACTION unexpected result at step %d\n", |
| 3182 | tcpcheck_get_step_id(check, rule)); |
| 3183 | set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area); |
| 3184 | ret = TCPCHK_EVAL_STOP; |
| 3185 | } |
| 3186 | |
| 3187 | return ret; |
| 3188 | } |
| 3189 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3190 | /* proceed with next steps for the TCP checks <check>. Note that this is called |
| 3191 | * both from the connection's wake() callback and from the check scheduling task. |
| 3192 | * It returns 0 on normal cases, or <0 if a close() has happened on an existing |
| 3193 | * connection, presenting the risk of an fd replacement. |
| 3194 | * |
| 3195 | * Please do NOT place any return statement in this function and only leave |
| 3196 | * via the out_end_tcpcheck label after setting retcode. |
| 3197 | */ |
| 3198 | static int tcpcheck_main(struct check *check) |
| 3199 | { |
| 3200 | struct tcpcheck_rule *rule; |
| 3201 | struct conn_stream *cs = check->cs; |
| 3202 | struct connection *conn = cs_conn(cs); |
| 3203 | int must_read = 1, last_read = 0; |
| 3204 | int ret, retcode = 0; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3205 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3206 | /* here, we know that the check is complete or that it failed */ |
| 3207 | if (check->result != CHK_RES_UNKNOWN) |
| 3208 | goto out_end_tcpcheck; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3209 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3210 | /* 1- check for connection error, if any */ |
| 3211 | if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR)) |
| 3212 | goto out_end_tcpcheck; |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3213 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3214 | /* 2- check if we are waiting for the connection establishment. It only |
| 3215 | * happens during TCPCHK_ACT_CONNECT. */ |
| 3216 | if (conn && (conn->flags & CO_FL_WAIT_XPRT)) |
| 3217 | goto out; |
Gaetan Rivet | 9e47fa4 | 2020-02-26 15:59:22 +0100 | [diff] [blame] | 3218 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3219 | /* 3- check for pending outgoing data. It only happens during TCPCHK_ACT_SEND. */ |
| 3220 | if (conn && b_data(&check->bo)) { |
| 3221 | ret = conn->mux->snd_buf(cs, &check->bo, b_data(&check->bo), 0); |
| 3222 | if (ret <= 0) { |
| 3223 | if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR)) |
| 3224 | goto out_end_tcpcheck; |
| 3225 | goto out; |
| 3226 | } |
| 3227 | if (b_data(&check->bo)) { |
| 3228 | cs->conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list); |
| 3229 | goto out; |
| 3230 | } |
| 3231 | } |
Gaetan Rivet | efab6c6 | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3232 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3233 | /* Now evaluate the tcp-check rules */ |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3234 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3235 | /* If check->current_step is defined, we are in resume condition. For |
| 3236 | * TCPCHK_ACT_CONNECT and TCPCHK_ACT_SEND rules, we must go to the next |
| 3237 | * rule before resuming the evaluation. For TCPCHK_ACT_EXPECT, we |
| 3238 | * re-evaluate the current rule. Others cannot yield. |
| 3239 | */ |
| 3240 | if (check->current_step) { |
| 3241 | if (check->current_step->action == TCPCHK_ACT_CONNECT || |
| 3242 | check->current_step->action == TCPCHK_ACT_SEND) |
| 3243 | rule = LIST_NEXT(&check->current_step->list, typeof(rule), list); |
| 3244 | else |
| 3245 | rule = check->current_step; |
| 3246 | } |
Gaetan Rivet | 05d692d | 2020-02-14 17:42:54 +0100 | [diff] [blame] | 3247 | else { |
| 3248 | /* First evaluation, create a session */ |
Gaetan Rivet | 13a5043 | 2020-02-21 18:13:44 +0100 | [diff] [blame] | 3249 | check->sess = session_new(&checks_fe, NULL, (check->server ? &check->server->obj_type : NULL)); |
Gaetan Rivet | 05d692d | 2020-02-14 17:42:54 +0100 | [diff] [blame] | 3250 | if (!check->sess) { |
| 3251 | chunk_printf(&trash, "TCPCHK error allocating check session"); |
| 3252 | set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area); |
| 3253 | goto out_end_tcpcheck; |
| 3254 | } |
Gaetan Rivet | 13a5043 | 2020-02-21 18:13:44 +0100 | [diff] [blame] | 3255 | vars_init(&check->vars, SCOPE_CHECK); |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3256 | rule = LIST_NEXT(check->tcpcheck_rules, typeof(rule), list); |
Gaetan Rivet | 05d692d | 2020-02-14 17:42:54 +0100 | [diff] [blame] | 3257 | } |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3258 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3259 | list_for_each_entry_from(rule, check->tcpcheck_rules, list) { |
| 3260 | enum tcpcheck_eval_ret eval_ret; |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3261 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3262 | switch (rule->action) { |
| 3263 | case TCPCHK_ACT_CONNECT: |
| 3264 | check->current_step = rule; |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3265 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3266 | /* close but not release yet previous connection */ |
| 3267 | if (check->cs) { |
| 3268 | cs_close(check->cs); |
| 3269 | retcode = -1; /* do not reuse the fd in the caller! */ |
Gaetan Rivet | 9e47fa4 | 2020-02-26 15:59:22 +0100 | [diff] [blame] | 3270 | } |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3271 | eval_ret = tcpcheck_eval_connect(check, rule); |
| 3272 | must_read = 1; last_read = 0; |
| 3273 | break; |
| 3274 | case TCPCHK_ACT_SEND: |
| 3275 | check->current_step = rule; |
| 3276 | eval_ret = tcpcheck_eval_send(check, rule); |
| 3277 | must_read = 1; |
| 3278 | break; |
| 3279 | case TCPCHK_ACT_EXPECT: |
| 3280 | check->current_step = rule; |
| 3281 | if (must_read) { |
| 3282 | if (check->proxy->timeout.check) |
| 3283 | check->task->expire = tick_add_ifset(now_ms, check->proxy->timeout.check); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3284 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3285 | /* If we already subscribed, then we tried to received and |
| 3286 | * failed, so there's no point trying again. |
| 3287 | */ |
| 3288 | if (check->wait_list.events & SUB_RETRY_RECV) |
| 3289 | goto out; |
| 3290 | if (conn->mux->rcv_buf(cs, &check->bi, b_size(&check->bi), 0) <= 0) { |
| 3291 | if (conn->flags & (CO_FL_ERROR|CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) { |
| 3292 | last_read = 1; |
| 3293 | if ((conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) && !b_data(&check->bi)) { |
| 3294 | /* Report network errors only if we got no other data. Otherwise |
| 3295 | * we'll let the upper layers decide whether the response is OK |
| 3296 | * or not. It is very common that an RST sent by the server is |
| 3297 | * reported as an error just after the last data chunk. |
| 3298 | */ |
| 3299 | goto out_end_tcpcheck; |
| 3300 | } |
| 3301 | } |
| 3302 | else { |
| 3303 | conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list); |
| 3304 | goto out; |
| 3305 | } |
| 3306 | } |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3307 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3308 | /* buffer full, don't wait for more data */ |
| 3309 | if (b_full(&check->bi)) |
| 3310 | last_read = 1; |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3311 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3312 | /* Check that response body is not empty... */ |
| 3313 | if (!b_data(&check->bi)) { |
| 3314 | char *comment; |
Gaetan Rivet | 9dcb09f | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3315 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3316 | if (!last_read) |
| 3317 | goto out; |
Gaetan Rivet | 9dcb09f | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3318 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3319 | /* empty response */ |
| 3320 | chunk_printf(&trash, "TCPCHK got an empty response at step %d", |
| 3321 | tcpcheck_get_step_id(check, rule)); |
| 3322 | comment = tcpcheck_get_step_comment(check, rule); |
| 3323 | if (comment) |
| 3324 | chunk_appendf(&trash, " comment: '%s'", comment); |
| 3325 | set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area); |
| 3326 | ret = -1; |
| 3327 | goto out_end_tcpcheck; |
Gaetan Rivet | 9dcb09f | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3328 | } |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3329 | must_read = 0; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3330 | } |
Gaetan Rivet | 0c39ecc | 2020-02-24 17:34:11 +0100 | [diff] [blame^] | 3331 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3332 | eval_ret = tcpcheck_eval_expect(check, rule, last_read); |
| 3333 | if (eval_ret == TCPCHK_EVAL_WAIT) { |
| 3334 | check->current_step = rule->expect.head; |
| 3335 | conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list); |
Gaetan Rivet | 9dcb09f | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3336 | } |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3337 | break; |
Gaetan Rivet | 0c39ecc | 2020-02-24 17:34:11 +0100 | [diff] [blame^] | 3338 | case TCPCHK_ACT_ACTION_KW: |
| 3339 | /* Don't update the current step */ |
| 3340 | eval_ret = tcpcheck_eval_action_kw(check, rule); |
| 3341 | break; |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3342 | default: |
| 3343 | /* Otherwise, just go to the next one and don't update |
| 3344 | * the current step |
| 3345 | */ |
| 3346 | eval_ret = TCPCHK_EVAL_CONTINUE; |
| 3347 | break; |
| 3348 | } |
Baptiste Assmann | 248f117 | 2018-03-01 21:49:01 +0100 | [diff] [blame] | 3349 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3350 | switch (eval_ret) { |
| 3351 | case TCPCHK_EVAL_CONTINUE: |
| 3352 | break; |
| 3353 | case TCPCHK_EVAL_WAIT: |
| 3354 | goto out; |
| 3355 | case TCPCHK_EVAL_STOP: |
| 3356 | goto out_end_tcpcheck; |
Baptiste Assmann | 248f117 | 2018-03-01 21:49:01 +0100 | [diff] [blame] | 3357 | } |
Baptiste Assmann | 248f117 | 2018-03-01 21:49:01 +0100 | [diff] [blame] | 3358 | } |
| 3359 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3360 | /* All rules was evaluated */ |
| 3361 | set_server_check_status(check, HCHK_STATUS_L7OKD, "(tcp-check)"); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3362 | |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3363 | out_end_tcpcheck: |
Willy Tarreau | ef91c93 | 2019-07-23 14:37:47 +0200 | [diff] [blame] | 3364 | if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR)) |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3365 | chk_report_conn_err(check, errno, 0); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3366 | |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3367 | /* cleanup before leaving */ |
Christopher Faulet | b2c2e0f | 2020-03-30 11:05:10 +0200 | [diff] [blame] | 3368 | check->current_step = NULL; |
Gaetan Rivet | 05d692d | 2020-02-14 17:42:54 +0100 | [diff] [blame] | 3369 | if (check->sess != NULL) { |
Gaetan Rivet | 13a5043 | 2020-02-21 18:13:44 +0100 | [diff] [blame] | 3370 | vars_prune(&check->vars, check->sess, NULL); |
Gaetan Rivet | 05d692d | 2020-02-14 17:42:54 +0100 | [diff] [blame] | 3371 | session_free(check->sess); |
| 3372 | check->sess = NULL; |
| 3373 | } |
| 3374 | out: |
| 3375 | return retcode; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3376 | } |
| 3377 | |
Christopher Faulet | 31c30fd | 2020-03-26 21:10:03 +0100 | [diff] [blame] | 3378 | static const char *init_check(struct check *check, int type) |
Simon Horman | b1900d5 | 2015-01-30 11:22:54 +0900 | [diff] [blame] | 3379 | { |
| 3380 | check->type = type; |
| 3381 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3382 | b_reset(&check->bi); check->bi.size = global.tune.chksize; |
| 3383 | b_reset(&check->bo); check->bo.size = global.tune.chksize; |
Simon Horman | b1900d5 | 2015-01-30 11:22:54 +0900 | [diff] [blame] | 3384 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3385 | check->bi.area = calloc(check->bi.size, sizeof(char)); |
| 3386 | check->bo.area = calloc(check->bo.size, sizeof(char)); |
| 3387 | |
| 3388 | if (!check->bi.area || !check->bo.area) |
Simon Horman | b1900d5 | 2015-01-30 11:22:54 +0900 | [diff] [blame] | 3389 | return "out of memory while allocating check buffer"; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3390 | |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 3391 | check->wait_list.tasklet = tasklet_new(); |
| 3392 | if (!check->wait_list.tasklet) |
Ilya Shipitsin | d425950 | 2020-04-08 01:07:56 +0500 | [diff] [blame] | 3393 | return "out of memory while allocating check tasklet"; |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 3394 | check->wait_list.events = 0; |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 3395 | check->wait_list.tasklet->process = event_srv_chk_io; |
| 3396 | check->wait_list.tasklet->context = check; |
Simon Horman | b1900d5 | 2015-01-30 11:22:54 +0900 | [diff] [blame] | 3397 | return NULL; |
| 3398 | } |
| 3399 | |
Simon Horman | bfb5d33 | 2015-01-30 11:22:55 +0900 | [diff] [blame] | 3400 | void free_check(struct check *check) |
| 3401 | { |
Christopher Faulet | 8892e5d | 2020-03-26 19:48:20 +0100 | [diff] [blame] | 3402 | task_destroy(check->task); |
| 3403 | if (check->wait_list.tasklet) |
| 3404 | tasklet_free(check->wait_list.tasklet); |
| 3405 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3406 | free(check->bi.area); |
| 3407 | free(check->bo.area); |
Christopher Faulet | 23d86d1 | 2018-01-25 11:36:35 +0100 | [diff] [blame] | 3408 | if (check->cs) { |
| 3409 | free(check->cs->conn); |
| 3410 | check->cs->conn = NULL; |
| 3411 | cs_free(check->cs); |
| 3412 | check->cs = NULL; |
| 3413 | } |
Simon Horman | bfb5d33 | 2015-01-30 11:22:55 +0900 | [diff] [blame] | 3414 | } |
| 3415 | |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 3416 | static void free_tcpcheck(struct tcpcheck_rule *rule, int in_pool) |
| 3417 | { |
| 3418 | if (!rule) |
| 3419 | return; |
| 3420 | |
| 3421 | free(rule->comment); |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3422 | switch (rule->action) { |
| 3423 | case TCPCHK_ACT_SEND: |
| 3424 | switch (rule->send.type) { |
| 3425 | case TCPCHK_SEND_STRING: |
| 3426 | case TCPCHK_SEND_BINARY: |
| 3427 | free(rule->send.string); |
| 3428 | break; |
| 3429 | case TCPCHK_SEND_UNDEF: |
| 3430 | break; |
| 3431 | } |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 3432 | break; |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3433 | case TCPCHK_ACT_EXPECT: |
| 3434 | switch (rule->expect.type) { |
| 3435 | case TCPCHK_EXPECT_STRING: |
| 3436 | case TCPCHK_EXPECT_BINARY: |
| 3437 | free(rule->expect.string); |
| 3438 | break; |
| 3439 | case TCPCHK_EXPECT_REGEX: |
| 3440 | case TCPCHK_EXPECT_REGEX_BINARY: |
| 3441 | regex_free(rule->expect.regex); |
| 3442 | break; |
| 3443 | case TCPCHK_EXPECT_UNDEF: |
| 3444 | break; |
| 3445 | } |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 3446 | break; |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3447 | case TCPCHK_ACT_CONNECT: |
| 3448 | case TCPCHK_ACT_COMMENT: |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 3449 | break; |
Gaetan Rivet | 707b52f | 2020-02-21 18:14:59 +0100 | [diff] [blame] | 3450 | case TCPCHK_ACT_ACTION_KW: |
| 3451 | free(rule->action_kw.rule); |
| 3452 | break; |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 3453 | } |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3454 | |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 3455 | if (in_pool) |
| 3456 | pool_free(pool_head_tcpcheck_rule, rule); |
| 3457 | else |
| 3458 | free(rule); |
| 3459 | } |
| 3460 | |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3461 | void email_alert_free(struct email_alert *alert) |
| 3462 | { |
| 3463 | struct tcpcheck_rule *rule, *back; |
| 3464 | |
| 3465 | if (!alert) |
| 3466 | return; |
| 3467 | |
Christopher Faulet | de1a75b | 2017-10-23 15:38:19 +0200 | [diff] [blame] | 3468 | list_for_each_entry_safe(rule, back, &alert->tcpcheck_rules, list) { |
| 3469 | LIST_DEL(&rule->list); |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 3470 | free_tcpcheck(rule, 1); |
Christopher Faulet | de1a75b | 2017-10-23 15:38:19 +0200 | [diff] [blame] | 3471 | } |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3472 | pool_free(pool_head_email_alert, alert); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3473 | } |
| 3474 | |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 3475 | static struct task *process_email_alert(struct task *t, void *context, unsigned short state) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3476 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 3477 | struct check *check = context; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3478 | struct email_alertq *q; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3479 | struct email_alert *alert; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3480 | |
| 3481 | q = container_of(check, typeof(*q), check); |
| 3482 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 3483 | HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3484 | while (1) { |
| 3485 | if (!(check->state & CHK_ST_ENABLED)) { |
| 3486 | if (LIST_ISEMPTY(&q->email_alerts)) { |
| 3487 | /* All alerts processed, queue the task */ |
| 3488 | t->expire = TICK_ETERNITY; |
| 3489 | task_queue(t); |
Christopher Faulet | c2a89a6 | 2017-10-23 15:54:24 +0200 | [diff] [blame] | 3490 | goto end; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3491 | } |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3492 | |
| 3493 | alert = LIST_NEXT(&q->email_alerts, typeof(alert), list); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3494 | LIST_DEL(&alert->list); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3495 | t->expire = now_ms; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3496 | check->tcpcheck_rules = &alert->tcpcheck_rules; |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 3497 | check->status = HCHK_STATUS_INI; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3498 | check->state |= CHK_ST_ENABLED; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3499 | } |
| 3500 | |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 3501 | process_chk(t, context, state); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3502 | if (check->state & CHK_ST_INPROGRESS) |
| 3503 | break; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3504 | |
| 3505 | alert = container_of(check->tcpcheck_rules, typeof(*alert), tcpcheck_rules); |
| 3506 | email_alert_free(alert); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3507 | check->tcpcheck_rules = NULL; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3508 | check->server = NULL; |
| 3509 | check->state &= ~CHK_ST_ENABLED; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3510 | } |
Christopher Faulet | c2a89a6 | 2017-10-23 15:54:24 +0200 | [diff] [blame] | 3511 | end: |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 3512 | HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3513 | return t; |
| 3514 | } |
| 3515 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3516 | /* Initializes mailer alerts for the proxy <p> using <mls> parameters. |
| 3517 | * |
| 3518 | * The function returns 1 in success case, otherwise, it returns 0 and err is |
| 3519 | * filled. |
| 3520 | */ |
| 3521 | int init_email_alert(struct mailers *mls, struct proxy *p, char **err) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3522 | { |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3523 | struct mailer *mailer; |
| 3524 | struct email_alertq *queues; |
| 3525 | const char *err_str; |
| 3526 | int i = 0; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3527 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3528 | if ((queues = calloc(mls->count, sizeof(*queues))) == NULL) { |
| 3529 | memprintf(err, "out of memory while allocating mailer alerts queues"); |
mildis | 5ab01cb | 2018-10-02 16:46:34 +0200 | [diff] [blame] | 3530 | goto fail_no_queue; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3531 | } |
| 3532 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3533 | for (mailer = mls->mailer_list; mailer; i++, mailer = mailer->next) { |
| 3534 | struct email_alertq *q = &queues[i]; |
| 3535 | struct check *check = &q->check; |
| 3536 | struct task *t; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3537 | |
| 3538 | LIST_INIT(&q->email_alerts); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 3539 | HA_SPIN_INIT(&q->lock); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3540 | check->inter = mls->timeout.mail; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3541 | check->rise = DEF_AGENT_RISETIME; |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 3542 | check->proxy = p; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3543 | check->fall = DEF_AGENT_FALLTIME; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3544 | if ((err_str = init_check(check, PR_O2_TCPCHK_CHK))) { |
| 3545 | memprintf(err, "%s", err_str); |
| 3546 | goto error; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3547 | } |
| 3548 | |
| 3549 | check->xprt = mailer->xprt; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3550 | check->addr = mailer->addr; |
Christopher Faulet | b797ae1 | 2018-03-27 15:35:35 +0200 | [diff] [blame] | 3551 | check->port = get_host_port(&mailer->addr); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3552 | |
Emeric Brun | c60def8 | 2017-09-27 14:59:38 +0200 | [diff] [blame] | 3553 | if ((t = task_new(MAX_THREADS_MASK)) == NULL) { |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3554 | memprintf(err, "out of memory while allocating mailer alerts task"); |
| 3555 | goto error; |
| 3556 | } |
| 3557 | |
| 3558 | check->task = t; |
| 3559 | t->process = process_email_alert; |
| 3560 | t->context = check; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3561 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3562 | /* check this in one ms */ |
| 3563 | t->expire = TICK_ETERNITY; |
| 3564 | check->start = now; |
| 3565 | task_queue(t); |
| 3566 | } |
| 3567 | |
| 3568 | mls->users++; |
| 3569 | free(p->email_alert.mailers.name); |
| 3570 | p->email_alert.mailers.m = mls; |
| 3571 | p->email_alert.queues = queues; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3572 | return 0; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3573 | |
| 3574 | error: |
| 3575 | for (i = 0; i < mls->count; i++) { |
| 3576 | struct email_alertq *q = &queues[i]; |
| 3577 | struct check *check = &q->check; |
| 3578 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3579 | free_check(check); |
| 3580 | } |
| 3581 | free(queues); |
mildis | 5ab01cb | 2018-10-02 16:46:34 +0200 | [diff] [blame] | 3582 | fail_no_queue: |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3583 | return 1; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3584 | } |
| 3585 | |
| 3586 | |
| 3587 | static int add_tcpcheck_expect_str(struct list *list, const char *str) |
| 3588 | { |
Gaetan Rivet | 4038b94 | 2020-02-26 16:19:40 +0100 | [diff] [blame] | 3589 | struct tcpcheck_rule *tcpcheck, *prev_check; |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3590 | struct tcpcheck_expect *expect; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3591 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3592 | if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3593 | return 0; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3594 | memset(tcpcheck, 0, sizeof(*tcpcheck)); |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3595 | tcpcheck->action = TCPCHK_ACT_EXPECT; |
| 3596 | |
| 3597 | expect = &tcpcheck->expect; |
| 3598 | expect->type = TCPCHK_EXPECT_STRING; |
| 3599 | expect->string = strdup(str); |
| 3600 | if (!expect->string) { |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3601 | pool_free(pool_head_tcpcheck_rule, tcpcheck); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3602 | return 0; |
| 3603 | } |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3604 | expect->length = strlen(expect->string); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3605 | |
Gaetan Rivet | 4038b94 | 2020-02-26 16:19:40 +0100 | [diff] [blame] | 3606 | /* All tcp-check expect points back to the first inverse expect rule |
| 3607 | * in a chain of one or more expect rule, potentially itself. |
| 3608 | */ |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3609 | tcpcheck->expect.head = tcpcheck; |
Gaetan Rivet | 4038b94 | 2020-02-26 16:19:40 +0100 | [diff] [blame] | 3610 | list_for_each_entry_rev(prev_check, list, list) { |
| 3611 | if (prev_check->action == TCPCHK_ACT_EXPECT) { |
Gaetan Rivet | b616add | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3612 | if (prev_check->expect.inverse) |
| 3613 | tcpcheck->expect.head = prev_check; |
Gaetan Rivet | 4038b94 | 2020-02-26 16:19:40 +0100 | [diff] [blame] | 3614 | continue; |
| 3615 | } |
Gaetan Rivet | 0c39ecc | 2020-02-24 17:34:11 +0100 | [diff] [blame^] | 3616 | if (prev_check->action != TCPCHK_ACT_COMMENT && prev_check->action != TCPCHK_ACT_ACTION_KW) |
Gaetan Rivet | 4038b94 | 2020-02-26 16:19:40 +0100 | [diff] [blame] | 3617 | break; |
| 3618 | } |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3619 | LIST_ADDQ(list, &tcpcheck->list); |
| 3620 | return 1; |
| 3621 | } |
| 3622 | |
| 3623 | static int add_tcpcheck_send_strs(struct list *list, const char * const *strs) |
| 3624 | { |
| 3625 | struct tcpcheck_rule *tcpcheck; |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3626 | struct tcpcheck_send *send; |
Willy Tarreau | 64345aa | 2016-08-10 19:29:09 +0200 | [diff] [blame] | 3627 | const char *in; |
| 3628 | char *dst; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3629 | int i; |
| 3630 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3631 | if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3632 | return 0; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3633 | memset(tcpcheck, 0, sizeof(*tcpcheck)); |
| 3634 | tcpcheck->action = TCPCHK_ACT_SEND; |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3635 | |
| 3636 | send = &tcpcheck->send; |
| 3637 | send->type = TCPCHK_SEND_STRING; |
| 3638 | |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3639 | for (i = 0; strs[i]; i++) |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3640 | send->length += strlen(strs[i]); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3641 | |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3642 | send->string = malloc(send->length + 1); |
| 3643 | if (!send->string) { |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3644 | pool_free(pool_head_tcpcheck_rule, tcpcheck); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3645 | return 0; |
| 3646 | } |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3647 | |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3648 | dst = send->string; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3649 | for (i = 0; strs[i]; i++) |
Willy Tarreau | 64345aa | 2016-08-10 19:29:09 +0200 | [diff] [blame] | 3650 | for (in = strs[i]; (*dst = *in++); dst++); |
| 3651 | *dst = 0; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3652 | |
| 3653 | LIST_ADDQ(list, &tcpcheck->list); |
| 3654 | return 1; |
| 3655 | } |
| 3656 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3657 | static int enqueue_one_email_alert(struct proxy *p, struct server *s, |
| 3658 | struct email_alertq *q, const char *msg) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3659 | { |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3660 | struct email_alert *alert; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3661 | struct tcpcheck_rule *tcpcheck; |
| 3662 | struct check *check = &q->check; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3663 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3664 | if ((alert = pool_alloc(pool_head_email_alert)) == NULL) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3665 | goto error; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3666 | LIST_INIT(&alert->list); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3667 | LIST_INIT(&alert->tcpcheck_rules); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3668 | alert->srv = s; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3669 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3670 | if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3671 | goto error; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3672 | memset(tcpcheck, 0, sizeof(*tcpcheck)); |
| 3673 | tcpcheck->action = TCPCHK_ACT_CONNECT; |
| 3674 | tcpcheck->comment = NULL; |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 3675 | |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3676 | LIST_ADDQ(&alert->tcpcheck_rules, &tcpcheck->list); |
| 3677 | |
| 3678 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "220 ")) |
| 3679 | goto error; |
| 3680 | |
| 3681 | { |
| 3682 | const char * const strs[4] = { "EHLO ", p->email_alert.myhostname, "\r\n" }; |
| 3683 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3684 | goto error; |
| 3685 | } |
| 3686 | |
| 3687 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 ")) |
| 3688 | goto error; |
| 3689 | |
| 3690 | { |
| 3691 | const char * const strs[4] = { "MAIL FROM:<", p->email_alert.from, ">\r\n" }; |
| 3692 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3693 | goto error; |
| 3694 | } |
| 3695 | |
| 3696 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 ")) |
| 3697 | goto error; |
| 3698 | |
| 3699 | { |
| 3700 | const char * const strs[4] = { "RCPT TO:<", p->email_alert.to, ">\r\n" }; |
| 3701 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3702 | goto error; |
| 3703 | } |
| 3704 | |
| 3705 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 ")) |
| 3706 | goto error; |
| 3707 | |
| 3708 | { |
| 3709 | const char * const strs[2] = { "DATA\r\n" }; |
| 3710 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3711 | goto error; |
| 3712 | } |
| 3713 | |
| 3714 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "354 ")) |
| 3715 | goto error; |
| 3716 | |
| 3717 | { |
| 3718 | struct tm tm; |
| 3719 | char datestr[48]; |
| 3720 | const char * const strs[18] = { |
Pieter Baauw | 5e0964e | 2016-02-13 16:27:35 +0100 | [diff] [blame] | 3721 | "From: ", p->email_alert.from, "\r\n", |
| 3722 | "To: ", p->email_alert.to, "\r\n", |
| 3723 | "Date: ", datestr, "\r\n", |
| 3724 | "Subject: [HAproxy Alert] ", msg, "\r\n", |
| 3725 | "\r\n", |
| 3726 | msg, "\r\n", |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3727 | "\r\n", |
Pieter Baauw | ed35c37 | 2015-07-22 19:51:54 +0200 | [diff] [blame] | 3728 | ".\r\n", |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3729 | NULL |
| 3730 | }; |
| 3731 | |
| 3732 | get_localtime(date.tv_sec, &tm); |
| 3733 | |
| 3734 | if (strftime(datestr, sizeof(datestr), "%a, %d %b %Y %T %z (%Z)", &tm) == 0) { |
| 3735 | goto error; |
| 3736 | } |
| 3737 | |
| 3738 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3739 | goto error; |
| 3740 | } |
| 3741 | |
| 3742 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 ")) |
| 3743 | goto error; |
| 3744 | |
| 3745 | { |
| 3746 | const char * const strs[2] = { "QUIT\r\n" }; |
| 3747 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3748 | goto error; |
| 3749 | } |
| 3750 | |
| 3751 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "221 ")) |
| 3752 | goto error; |
| 3753 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 3754 | HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3755 | task_wakeup(check->task, TASK_WOKEN_MSG); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3756 | LIST_ADDQ(&q->email_alerts, &alert->list); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 3757 | HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3758 | return 1; |
| 3759 | |
| 3760 | error: |
| 3761 | email_alert_free(alert); |
| 3762 | return 0; |
| 3763 | } |
| 3764 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3765 | static void enqueue_email_alert(struct proxy *p, struct server *s, const char *msg) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3766 | { |
| 3767 | int i; |
| 3768 | struct mailer *mailer; |
| 3769 | |
| 3770 | for (i = 0, mailer = p->email_alert.mailers.m->mailer_list; |
| 3771 | i < p->email_alert.mailers.m->count; i++, mailer = mailer->next) { |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3772 | if (!enqueue_one_email_alert(p, s, &p->email_alert.queues[i], msg)) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 3773 | ha_alert("Email alert [%s] could not be enqueued: out of memory\n", p->id); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3774 | return; |
| 3775 | } |
| 3776 | } |
| 3777 | |
| 3778 | return; |
| 3779 | } |
| 3780 | |
| 3781 | /* |
| 3782 | * Send email alert if configured. |
| 3783 | */ |
Simon Horman | 64e3416 | 2015-02-06 11:11:57 +0900 | [diff] [blame] | 3784 | void send_email_alert(struct server *s, int level, const char *format, ...) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3785 | { |
| 3786 | va_list argp; |
| 3787 | char buf[1024]; |
| 3788 | int len; |
| 3789 | struct proxy *p = s->proxy; |
| 3790 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3791 | if (!p->email_alert.mailers.m || level > p->email_alert.level || format == NULL) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3792 | return; |
| 3793 | |
| 3794 | va_start(argp, format); |
| 3795 | len = vsnprintf(buf, sizeof(buf), format, argp); |
| 3796 | va_end(argp); |
| 3797 | |
Thierry FOURNIER | 62c8a21 | 2017-02-09 12:19:27 +0100 | [diff] [blame] | 3798 | if (len < 0 || len >= sizeof(buf)) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 3799 | ha_alert("Email alert [%s] could not format message\n", p->id); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3800 | return; |
| 3801 | } |
| 3802 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3803 | enqueue_email_alert(p, s, buf); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3804 | } |
| 3805 | |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 3806 | /* |
| 3807 | * Return value: |
| 3808 | * the port to be used for the health check |
| 3809 | * 0 in case no port could be found for the check |
| 3810 | */ |
Christopher Faulet | 31c30fd | 2020-03-26 21:10:03 +0100 | [diff] [blame] | 3811 | static int srv_check_healthcheck_port(struct check *chk) |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 3812 | { |
| 3813 | int i = 0; |
| 3814 | struct server *srv = NULL; |
| 3815 | |
| 3816 | srv = chk->server; |
| 3817 | |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 3818 | /* by default, we use the health check port ocnfigured */ |
| 3819 | if (chk->port > 0) |
| 3820 | return chk->port; |
| 3821 | |
| 3822 | /* try to get the port from check_core.addr if check.port not set */ |
| 3823 | i = get_host_port(&chk->addr); |
| 3824 | if (i > 0) |
| 3825 | return i; |
| 3826 | |
| 3827 | /* try to get the port from server address */ |
| 3828 | /* prevent MAPPORTS from working at this point, since checks could |
| 3829 | * not be performed in such case (MAPPORTS impose a relative ports |
| 3830 | * based on live traffic) |
| 3831 | */ |
| 3832 | if (srv->flags & SRV_F_MAPPORTS) |
| 3833 | return 0; |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 3834 | |
| 3835 | i = srv->svc_port; /* by default */ |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 3836 | if (i > 0) |
| 3837 | return i; |
| 3838 | |
| 3839 | return 0; |
| 3840 | } |
| 3841 | |
Willy Tarreau | 172f5ce | 2018-11-26 11:21:50 +0100 | [diff] [blame] | 3842 | REGISTER_POST_CHECK(start_checks); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3843 | |
Christopher Faulet | a202d1d | 2020-03-26 17:38:49 +0100 | [diff] [blame] | 3844 | static int check_proxy_tcpcheck(struct proxy *px) |
| 3845 | { |
| 3846 | struct tcpcheck_rule *chk; |
| 3847 | int ret = 0; |
| 3848 | |
| 3849 | if (!px->tcpcheck_rules) |
| 3850 | goto out; |
| 3851 | |
| 3852 | /* If there is no connect rule preceeding all send / expect rules, an |
| 3853 | * implicit one is inserted before all others |
| 3854 | */ |
| 3855 | chk = get_first_tcpcheck_rule(px->tcpcheck_rules); |
| 3856 | if (!chk || chk->action != TCPCHK_ACT_CONNECT) { |
| 3857 | chk = calloc(1, sizeof(*chk)); |
| 3858 | if (!chk) { |
| 3859 | ha_alert("config : proxy '%s': unable to add implicit tcp-check connect rule " |
| 3860 | "(out of memory).\n", px->id); |
| 3861 | ret |= ERR_ALERT | ERR_FATAL; |
| 3862 | goto out; |
| 3863 | } |
| 3864 | chk->action = TCPCHK_ACT_CONNECT; |
| 3865 | chk->connect.options = TCPCHK_OPT_DEFAULT_CONNECT; |
| 3866 | LIST_ADD(px->tcpcheck_rules, &chk->list); |
| 3867 | } |
| 3868 | |
| 3869 | out: |
| 3870 | return ret; |
| 3871 | } |
| 3872 | |
Christopher Faulet | 8892e5d | 2020-03-26 19:48:20 +0100 | [diff] [blame] | 3873 | static int init_srv_check(struct server *srv) |
| 3874 | { |
| 3875 | const char *err; |
| 3876 | struct tcpcheck_rule *r; |
| 3877 | int ret = 0; |
| 3878 | |
| 3879 | if (!srv->do_check) |
| 3880 | goto out; |
| 3881 | |
| 3882 | |
| 3883 | /* If neither a port nor an addr was specified and no check transport |
| 3884 | * layer is forced, then the transport layer used by the checks is the |
| 3885 | * same as for the production traffic. Otherwise we use raw_sock by |
| 3886 | * default, unless one is specified. |
| 3887 | */ |
| 3888 | if (!srv->check.port && !is_addr(&srv->check.addr)) { |
| 3889 | if (!srv->check.use_ssl && srv->use_ssl != -1) { |
| 3890 | srv->check.use_ssl = srv->use_ssl; |
| 3891 | srv->check.xprt = srv->xprt; |
| 3892 | } |
| 3893 | else if (srv->check.use_ssl == 1) |
| 3894 | srv->check.xprt = xprt_get(XPRT_SSL); |
| 3895 | |
| 3896 | srv->check.send_proxy |= (srv->pp_opts); |
| 3897 | } |
| 3898 | |
| 3899 | /* validate <srv> server health-check settings */ |
| 3900 | |
| 3901 | /* We need at least a service port, a check port or the first tcp-check |
| 3902 | * rule must be a 'connect' one when checking an IPv4/IPv6 server. |
| 3903 | */ |
| 3904 | if ((srv_check_healthcheck_port(&srv->check) != 0) || |
| 3905 | (!is_inet_addr(&srv->check.addr) && (is_addr(&srv->check.addr) || !is_inet_addr(&srv->addr)))) |
| 3906 | goto init; |
| 3907 | |
Gaetan Rivet | 04578db | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3908 | if (!srv->proxy->tcpcheck_rules || LIST_ISEMPTY(srv->proxy->tcpcheck_rules)) { |
Christopher Faulet | 8892e5d | 2020-03-26 19:48:20 +0100 | [diff] [blame] | 3909 | ha_alert("config: %s '%s': server '%s' has neither service port nor check port.\n", |
| 3910 | proxy_type_str(srv->proxy), srv->proxy->id, srv->id); |
| 3911 | ret |= ERR_ALERT | ERR_ABORT; |
| 3912 | goto out; |
| 3913 | } |
| 3914 | |
| 3915 | /* search the first action (connect / send / expect) in the list */ |
Gaetan Rivet | 04578db | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3916 | r = get_first_tcpcheck_rule(srv->proxy->tcpcheck_rules); |
Gaetan Rivet | 06d963a | 2020-02-21 18:49:05 +0100 | [diff] [blame] | 3917 | if (!r || (r->action != TCPCHK_ACT_CONNECT) || !r->connect.port) { |
Christopher Faulet | 8892e5d | 2020-03-26 19:48:20 +0100 | [diff] [blame] | 3918 | ha_alert("config: %s '%s': server '%s' has neither service port nor check port " |
| 3919 | "nor tcp_check rule 'connect' with port information.\n", |
| 3920 | proxy_type_str(srv->proxy), srv->proxy->id, srv->id); |
| 3921 | ret |= ERR_ALERT | ERR_ABORT; |
| 3922 | goto out; |
| 3923 | } |
| 3924 | |
| 3925 | /* scan the tcp-check ruleset to ensure a port has been configured */ |
Gaetan Rivet | 04578db | 2020-02-07 15:37:17 +0100 | [diff] [blame] | 3926 | list_for_each_entry(r, srv->proxy->tcpcheck_rules, list) { |
Gaetan Rivet | 06d963a | 2020-02-21 18:49:05 +0100 | [diff] [blame] | 3927 | if ((r->action == TCPCHK_ACT_CONNECT) && (!r->connect.port)) { |
Christopher Faulet | 8892e5d | 2020-03-26 19:48:20 +0100 | [diff] [blame] | 3928 | ha_alert("config: %s '%s': server '%s' has neither service port nor check port, " |
| 3929 | "and a tcp_check rule 'connect' with no port information.\n", |
| 3930 | proxy_type_str(srv->proxy), srv->proxy->id, srv->id); |
| 3931 | ret |= ERR_ALERT | ERR_ABORT; |
| 3932 | goto out; |
| 3933 | } |
| 3934 | } |
| 3935 | |
| 3936 | init: |
| 3937 | err = init_check(&srv->check, srv->proxy->options2 & PR_O2_CHK_ANY); |
| 3938 | if (err) { |
| 3939 | ha_alert("config: %s '%s': unable to init check for server '%s' (%s).\n", |
| 3940 | proxy_type_str(srv->proxy), srv->proxy->id, srv->id, err); |
| 3941 | ret |= ERR_ALERT | ERR_ABORT; |
| 3942 | goto out; |
| 3943 | } |
| 3944 | srv->check.state |= CHK_ST_CONFIGURED | CHK_ST_ENABLED; |
| 3945 | global.maxsock++; |
| 3946 | |
| 3947 | out: |
| 3948 | return ret; |
| 3949 | } |
| 3950 | |
| 3951 | static int init_srv_agent_check(struct server *srv) |
| 3952 | { |
| 3953 | const char *err; |
| 3954 | int ret = 0; |
| 3955 | |
| 3956 | if (!srv->do_agent) |
| 3957 | goto out; |
| 3958 | |
| 3959 | err = init_check(&srv->agent, PR_O2_LB_AGENT_CHK); |
| 3960 | if (err) { |
| 3961 | ha_alert("config: %s '%s': unable to init agent-check for server '%s' (%s).\n", |
| 3962 | proxy_type_str(srv->proxy), srv->proxy->id, srv->id, err); |
| 3963 | ret |= ERR_ALERT | ERR_ABORT; |
| 3964 | goto out; |
| 3965 | } |
| 3966 | |
| 3967 | if (!srv->agent.inter) |
| 3968 | srv->agent.inter = srv->check.inter; |
| 3969 | |
| 3970 | srv->agent.state |= CHK_ST_CONFIGURED | CHK_ST_ENABLED | CHK_ST_AGENT; |
| 3971 | global.maxsock++; |
| 3972 | |
| 3973 | out: |
| 3974 | return ret; |
| 3975 | } |
| 3976 | |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 3977 | static void deinit_proxy_tcpcheck(struct proxy *px) |
| 3978 | { |
| 3979 | struct tcpcheck_rule *chk, *back; |
| 3980 | |
| 3981 | if (!px->tcpcheck_rules) |
| 3982 | return; |
| 3983 | |
| 3984 | list_for_each_entry_safe(chk, back, px->tcpcheck_rules, list) { |
| 3985 | LIST_DEL(&chk->list); |
| 3986 | free_tcpcheck(chk, 0); |
| 3987 | } |
| 3988 | free(px->tcpcheck_rules); |
| 3989 | px->tcpcheck_rules = NULL; |
| 3990 | } |
| 3991 | |
Christopher Faulet | 8892e5d | 2020-03-26 19:48:20 +0100 | [diff] [blame] | 3992 | static void deinit_srv_check(struct server *srv) |
| 3993 | { |
| 3994 | if (srv->do_check) |
| 3995 | free_check(&srv->check); |
| 3996 | } |
| 3997 | |
| 3998 | |
| 3999 | static void deinit_srv_agent_check(struct server *srv) |
| 4000 | { |
| 4001 | if (srv->do_agent) |
| 4002 | free_check(&srv->agent); |
| 4003 | free(srv->agent.send_string); |
| 4004 | } |
| 4005 | |
Christopher Faulet | a202d1d | 2020-03-26 17:38:49 +0100 | [diff] [blame] | 4006 | |
| 4007 | REGISTER_POST_PROXY_CHECK(check_proxy_tcpcheck); |
Christopher Faulet | 8892e5d | 2020-03-26 19:48:20 +0100 | [diff] [blame] | 4008 | REGISTER_POST_SERVER_CHECK(init_srv_check); |
| 4009 | REGISTER_POST_SERVER_CHECK(init_srv_agent_check); |
| 4010 | |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4011 | REGISTER_PROXY_DEINIT(deinit_proxy_tcpcheck); |
Christopher Faulet | 8892e5d | 2020-03-26 19:48:20 +0100 | [diff] [blame] | 4012 | REGISTER_SERVER_DEINIT(deinit_srv_check); |
| 4013 | REGISTER_SERVER_DEINIT(deinit_srv_agent_check); |
| 4014 | |
Gaetan Rivet | 707b52f | 2020-02-21 18:14:59 +0100 | [diff] [blame] | 4015 | struct action_kw_list tcp_check_keywords = { |
| 4016 | .list = LIST_HEAD_INIT(tcp_check_keywords.list), |
| 4017 | }; |
| 4018 | |
| 4019 | /* Return the struct action_kw associated to a keyword */ |
| 4020 | static struct action_kw *action_kw_tcp_check_lookup(const char *kw) |
| 4021 | { |
| 4022 | return action_lookup(&tcp_check_keywords.list, kw); |
| 4023 | } |
| 4024 | |
| 4025 | static void action_kw_tcp_check_build_list(struct buffer *chk) |
| 4026 | { |
| 4027 | action_build_list(&tcp_check_keywords.list, chk); |
| 4028 | } |
| 4029 | |
| 4030 | /* Create a tcp-check rule resulting from parsing a custom keyword. */ |
| 4031 | static struct tcpcheck_rule *parse_tcpcheck_action(char **args, int cur_arg, struct proxy *px, |
| 4032 | struct list *rules, struct action_kw *kw, char **errmsg) |
| 4033 | { |
| 4034 | struct tcpcheck_rule *chk = NULL; |
| 4035 | struct act_rule *actrule = NULL; |
| 4036 | |
| 4037 | actrule = calloc(1, sizeof(*actrule)); |
| 4038 | if (!actrule) { |
| 4039 | memprintf(errmsg, "out of memory"); |
| 4040 | goto error; |
| 4041 | } |
| 4042 | actrule->kw = kw; |
| 4043 | actrule->from = ACT_F_TCP_CHK; |
| 4044 | |
| 4045 | cur_arg++; |
| 4046 | if (kw->parse((const char **)args, &cur_arg, px, actrule, errmsg) == ACT_RET_PRS_ERR) { |
| 4047 | memprintf(errmsg, "'%s' : %s", kw->kw, *errmsg); |
| 4048 | goto error; |
| 4049 | } |
| 4050 | |
| 4051 | chk = calloc(1, sizeof(*chk)); |
| 4052 | if (!chk) { |
| 4053 | memprintf(errmsg, "out of memory"); |
| 4054 | goto error; |
| 4055 | } |
| 4056 | chk->action = TCPCHK_ACT_ACTION_KW; |
| 4057 | chk->action_kw.rule = actrule; |
| 4058 | return chk; |
| 4059 | |
| 4060 | error: |
| 4061 | free(actrule); |
| 4062 | return NULL; |
| 4063 | } |
| 4064 | |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4065 | static struct tcpcheck_rule *parse_tcpcheck_connect(char **args, int cur_arg, struct proxy *px, struct list *rules, |
| 4066 | char **errmsg) |
| 4067 | { |
| 4068 | struct tcpcheck_rule *chk = NULL; |
| 4069 | char *comment = NULL; |
| 4070 | unsigned short conn_opts = 0; |
| 4071 | long port = 0; |
| 4072 | |
| 4073 | list_for_each_entry(chk, rules, list) { |
Gaetan Rivet | 707b52f | 2020-02-21 18:14:59 +0100 | [diff] [blame] | 4074 | if (chk->action != TCPCHK_ACT_COMMENT && chk->action != TCPCHK_ACT_ACTION_KW) |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4075 | break; |
| 4076 | } |
| 4077 | if (&chk->list != rules && chk->action != TCPCHK_ACT_CONNECT) { |
Gaetan Rivet | 707b52f | 2020-02-21 18:14:59 +0100 | [diff] [blame] | 4078 | memprintf(errmsg, "first step MUST also be a 'connect', " |
| 4079 | "optionnaly preceded by a 'set-var', an 'unset-var' or a 'comment', " |
| 4080 | "when there is a 'connect' step in the tcp-check ruleset"); |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4081 | goto error; |
| 4082 | } |
| 4083 | |
| 4084 | cur_arg++; |
| 4085 | while (*(args[cur_arg])) { |
| 4086 | if (strcmp(args[cur_arg], "port") == 0) { |
| 4087 | if (!*(args[cur_arg+1])) { |
| 4088 | memprintf(errmsg, "'%s' expects a port number as argument.", args[cur_arg]); |
| 4089 | goto error; |
| 4090 | } |
| 4091 | cur_arg++; |
| 4092 | port = atol(args[cur_arg]); |
| 4093 | if (port > 65535 || port < 1) { |
| 4094 | memprintf(errmsg, "expects a valid TCP port (from range 1 to 65535), got %s.", args[cur_arg]); |
| 4095 | goto error; |
| 4096 | } |
| 4097 | } |
| 4098 | else if (strcmp(args[cur_arg], "comment") == 0) { |
| 4099 | if (!*(args[cur_arg+1])) { |
| 4100 | memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]); |
| 4101 | goto error; |
| 4102 | } |
| 4103 | cur_arg++; |
| 4104 | free(comment); |
| 4105 | comment = strdup(args[cur_arg]); |
| 4106 | if (!comment) { |
| 4107 | memprintf(errmsg, "out of memory"); |
| 4108 | goto error; |
| 4109 | } |
| 4110 | } |
| 4111 | else if (strcmp(args[cur_arg], "send-proxy") == 0) |
| 4112 | conn_opts |= TCPCHK_OPT_SEND_PROXY; |
| 4113 | else if (strcmp(args[cur_arg], "linger") == 0) |
| 4114 | conn_opts |= TCPCHK_OPT_LINGER; |
| 4115 | #ifdef USE_OPENSSL |
| 4116 | else if (strcmp(args[cur_arg], "ssl") == 0) { |
| 4117 | px->options |= PR_O_TCPCHK_SSL; |
| 4118 | conn_opts |= TCPCHK_OPT_SSL; |
| 4119 | } |
| 4120 | #endif /* USE_OPENSSL */ |
| 4121 | |
| 4122 | else { |
| 4123 | memprintf(errmsg, "expects 'comment', 'port', 'send-proxy'" |
| 4124 | #ifdef USE_OPENSSL |
| 4125 | ", 'ssl'" |
| 4126 | #endif /* USE_OPENSSL */ |
| 4127 | " or 'linger' but got '%s' as argument.", |
| 4128 | args[cur_arg]); |
| 4129 | goto error; |
| 4130 | } |
| 4131 | cur_arg++; |
| 4132 | } |
| 4133 | |
| 4134 | chk = calloc(1, sizeof(*chk)); |
| 4135 | if (!chk) { |
| 4136 | memprintf(errmsg, "out of memory"); |
| 4137 | goto error; |
| 4138 | } |
Gaetan Rivet | 06d963a | 2020-02-21 18:49:05 +0100 | [diff] [blame] | 4139 | chk->action = TCPCHK_ACT_CONNECT; |
| 4140 | chk->comment = comment; |
| 4141 | chk->connect.port = port; |
| 4142 | chk->connect.options = conn_opts; |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4143 | return chk; |
| 4144 | |
| 4145 | error: |
| 4146 | free(comment); |
| 4147 | return NULL; |
| 4148 | } |
| 4149 | |
| 4150 | static struct tcpcheck_rule *parse_tcpcheck_send(char **args, int cur_arg, struct list *rules, char **errmsg) |
| 4151 | { |
| 4152 | struct tcpcheck_rule *chk = NULL; |
| 4153 | char *str = NULL, *comment = NULL; |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 4154 | enum tcpcheck_send_type type = TCPCHK_SEND_UNDEF; |
| 4155 | int len; |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4156 | |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 4157 | type = ((strcmp(args[cur_arg], "send-binary") == 0) ? TCPCHK_SEND_BINARY : TCPCHK_SEND_STRING); |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4158 | if (!*(args[cur_arg+1])) { |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 4159 | memprintf(errmsg, "'%s' expects a %s as argument", |
| 4160 | (type == TCPCHK_SEND_BINARY ? "binary string": "string"), args[cur_arg]); |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4161 | goto error; |
| 4162 | } |
| 4163 | |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 4164 | if (type == TCPCHK_SEND_BINARY) { |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4165 | if (parse_binary(args[cur_arg+1], &str, &len, errmsg) == 0) { |
| 4166 | memprintf(errmsg, "'%s' invalid binary string (%s).\n", args[cur_arg], *errmsg); |
| 4167 | goto error; |
| 4168 | } |
| 4169 | } |
| 4170 | else { |
| 4171 | str = strdup(args[cur_arg+1]); |
| 4172 | len = strlen(args[cur_arg+1]); |
| 4173 | if (!str) { |
| 4174 | memprintf(errmsg, "out of memory"); |
| 4175 | goto error; |
| 4176 | } |
| 4177 | } |
| 4178 | cur_arg++; |
| 4179 | |
| 4180 | if (strcmp(args[cur_arg], "comment") == 0) { |
| 4181 | if (!*(args[cur_arg+1])) { |
| 4182 | memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]); |
| 4183 | goto error; |
| 4184 | } |
| 4185 | cur_arg++; |
| 4186 | comment = strdup(args[cur_arg]); |
| 4187 | if (!comment) { |
| 4188 | memprintf(errmsg, "out of memory"); |
| 4189 | goto error; |
| 4190 | } |
| 4191 | } |
| 4192 | |
| 4193 | chk = calloc(1, sizeof(*chk)); |
| 4194 | if (!chk) { |
| 4195 | memprintf(errmsg, "out of memory"); |
| 4196 | goto error; |
| 4197 | } |
Gaetan Rivet | 48219dc | 2020-02-21 18:41:28 +0100 | [diff] [blame] | 4198 | chk->action = TCPCHK_ACT_SEND; |
| 4199 | chk->comment = comment; |
| 4200 | chk->send.type = type; |
| 4201 | chk->send.string = str; |
| 4202 | chk->send.length = len; |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4203 | return chk; |
| 4204 | |
| 4205 | error: |
| 4206 | free(str); |
| 4207 | free(comment); |
| 4208 | return NULL; |
| 4209 | } |
| 4210 | |
| 4211 | static struct tcpcheck_rule *parse_tcpcheck_comment(char **args, int cur_arg, struct list *rules, char **errmsg) |
| 4212 | { |
| 4213 | struct tcpcheck_rule *chk = NULL; |
| 4214 | char *comment = NULL; |
| 4215 | |
| 4216 | if (!*(args[cur_arg+1])) { |
| 4217 | memprintf(errmsg, "expects a string as argument"); |
| 4218 | goto error; |
| 4219 | } |
| 4220 | cur_arg++; |
| 4221 | comment = strdup(args[cur_arg]); |
| 4222 | if (!comment) { |
| 4223 | memprintf(errmsg, "out of memory"); |
| 4224 | goto error; |
| 4225 | } |
| 4226 | |
| 4227 | chk = calloc(1, sizeof(*chk)); |
| 4228 | if (!chk) { |
| 4229 | memprintf(errmsg, "out of memory"); |
| 4230 | goto error; |
| 4231 | } |
| 4232 | chk->action = TCPCHK_ACT_COMMENT; |
| 4233 | chk->comment = comment; |
| 4234 | return chk; |
| 4235 | |
| 4236 | error: |
| 4237 | free(comment); |
| 4238 | return NULL; |
| 4239 | } |
| 4240 | |
| 4241 | static struct tcpcheck_rule *parse_tcpcheck_expect(char **args, int cur_arg, struct list *rules, char **errmsg) |
| 4242 | { |
| 4243 | struct tcpcheck_rule *prev_check, *chk = NULL; |
| 4244 | char *str = NULL, *comment = NULL, *pattern = NULL; |
| 4245 | enum tcpcheck_expect_type type = TCPCHK_EXPECT_UNDEF; |
| 4246 | long min_recv = -1; |
| 4247 | int inverse = 0, with_capture = 0; |
| 4248 | |
| 4249 | if (!*(args[cur_arg+1]) || !*(args[cur_arg+2])) { |
| 4250 | memprintf(errmsg, "expects a pattern (type+string) as arguments"); |
| 4251 | goto error; |
| 4252 | } |
| 4253 | |
| 4254 | cur_arg++; |
| 4255 | while (*(args[cur_arg])) { |
| 4256 | int in_pattern = 0; |
| 4257 | |
| 4258 | rescan: |
| 4259 | if (strcmp(args[cur_arg], "min-recv") == 0) { |
| 4260 | if (in_pattern) { |
| 4261 | memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]); |
| 4262 | goto error; |
| 4263 | } |
| 4264 | if (!*(args[cur_arg+1])) { |
| 4265 | memprintf(errmsg, "'%s' expects a integer as argument", args[cur_arg]); |
| 4266 | goto error; |
| 4267 | } |
| 4268 | /* Use an signed integer here because of chksize */ |
| 4269 | cur_arg++; |
| 4270 | min_recv = atol(args[cur_arg]); |
| 4271 | if (min_recv < -1 || min_recv > INT_MAX) { |
| 4272 | memprintf(errmsg, "'%s' expects -1 or an integer from 0 to INT_MAX" , args[cur_arg-1]); |
| 4273 | goto error; |
| 4274 | } |
| 4275 | } |
| 4276 | else if (*(args[cur_arg]) == '!') { |
| 4277 | in_pattern = 1; |
| 4278 | while (*(args[cur_arg]) == '!') { |
| 4279 | inverse = !inverse; |
| 4280 | args[cur_arg]++; |
| 4281 | } |
| 4282 | if (!*(args[cur_arg])) |
| 4283 | cur_arg++; |
| 4284 | goto rescan; |
| 4285 | } |
| 4286 | else if (strcmp(args[cur_arg], "string") == 0 || strcmp(args[cur_arg], "binary") == 0 || |
| 4287 | strcmp(args[cur_arg], "rstring") == 0 || strcmp(args[cur_arg], "rbinary") == 0) { |
| 4288 | if (type != TCPCHK_EXPECT_UNDEF) { |
| 4289 | memprintf(errmsg, "only on pattern expected"); |
| 4290 | goto error; |
| 4291 | } |
| 4292 | type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_STRING : |
| 4293 | ((*(args[cur_arg]) == 'b') ? TCPCHK_EXPECT_BINARY : |
| 4294 | ((*(args[cur_arg]+1) == 's') ? TCPCHK_EXPECT_REGEX : TCPCHK_EXPECT_REGEX_BINARY))); |
| 4295 | |
| 4296 | if (!*(args[cur_arg+1])) { |
| 4297 | memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]); |
| 4298 | goto error; |
| 4299 | } |
| 4300 | cur_arg++; |
| 4301 | pattern = args[cur_arg]; |
| 4302 | } |
| 4303 | else if (strcmp(args[cur_arg], "comment") == 0) { |
| 4304 | if (in_pattern) { |
| 4305 | memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]); |
| 4306 | goto error; |
| 4307 | } |
| 4308 | if (!*(args[cur_arg+1])) { |
| 4309 | memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]); |
| 4310 | goto error; |
| 4311 | } |
| 4312 | cur_arg++; |
| 4313 | free(comment); |
| 4314 | comment = strdup(args[cur_arg]); |
| 4315 | if (!comment) { |
| 4316 | memprintf(errmsg, "out of memory"); |
| 4317 | goto error; |
| 4318 | } |
| 4319 | } |
| 4320 | else { |
| 4321 | memprintf(errmsg, "'only supports min-recv, '[!]binary', '[!]string', '[!]rstring', '[!]rbinary'" |
| 4322 | " or comment but got '%s' as argument.", args[cur_arg]); |
| 4323 | goto error; |
| 4324 | } |
| 4325 | |
| 4326 | cur_arg++; |
| 4327 | } |
| 4328 | |
| 4329 | if (comment) { |
| 4330 | char *p = comment; |
| 4331 | |
| 4332 | while (*p) { |
| 4333 | if (*p == '\\') { |
| 4334 | p++; |
| 4335 | if (!*p || !isdigit((unsigned char)*p) || |
| 4336 | (*p == 'x' && (!*(p+1) || !*(p+2) || !ishex(*(p+1)) || !ishex(*(p+2))))) { |
| 4337 | memprintf(errmsg, "invalid backreference in 'comment' argument"); |
| 4338 | goto error; |
| 4339 | } |
| 4340 | with_capture = 1; |
| 4341 | } |
| 4342 | p++; |
| 4343 | } |
| 4344 | if (with_capture && !inverse) |
| 4345 | memprintf(errmsg, "using backreference in a positive expect comment is useless"); |
| 4346 | } |
| 4347 | |
| 4348 | chk = calloc(1, sizeof(*chk)); |
| 4349 | if (!chk) { |
| 4350 | memprintf(errmsg, "out of memory"); |
| 4351 | goto error; |
| 4352 | } |
| 4353 | chk->action = TCPCHK_ACT_EXPECT; |
| 4354 | chk->comment = comment; |
| 4355 | chk->expect.type = type; |
| 4356 | chk->expect.min_recv = min_recv; |
| 4357 | chk->expect.inverse = inverse; |
| 4358 | chk->expect.with_capture = with_capture; |
| 4359 | |
| 4360 | switch (chk->expect.type) { |
| 4361 | case TCPCHK_EXPECT_STRING: |
| 4362 | chk->expect.string = strdup(pattern); |
| 4363 | chk->expect.length = strlen(pattern); |
| 4364 | if (!chk->expect.string) { |
| 4365 | memprintf(errmsg, "out of memory"); |
| 4366 | goto error; |
| 4367 | } |
| 4368 | break; |
| 4369 | case TCPCHK_EXPECT_BINARY: |
| 4370 | if (parse_binary(pattern, &chk->expect.string, &chk->expect.length, errmsg) == 0) { |
| 4371 | memprintf(errmsg, "invalid binary string (%s)", *errmsg); |
| 4372 | goto error; |
| 4373 | } |
| 4374 | case TCPCHK_EXPECT_REGEX: |
| 4375 | case TCPCHK_EXPECT_REGEX_BINARY: |
| 4376 | chk->expect.regex = regex_comp(pattern, 1, with_capture, errmsg); |
| 4377 | if (!chk->expect.regex) |
| 4378 | goto error; |
| 4379 | break; |
| 4380 | case TCPCHK_EXPECT_UNDEF: |
| 4381 | free(chk); |
| 4382 | memprintf(errmsg, "pattern not found"); |
| 4383 | goto error; |
| 4384 | } |
| 4385 | |
| 4386 | /* All tcp-check expect points back to the first inverse expect rule in |
| 4387 | * a chain of one or more expect rule, potentially itself. |
| 4388 | */ |
| 4389 | chk->expect.head = chk; |
| 4390 | list_for_each_entry_rev(prev_check, rules, list) { |
| 4391 | if (prev_check->action == TCPCHK_ACT_EXPECT) { |
| 4392 | if (prev_check->expect.inverse) |
| 4393 | chk->expect.head = prev_check; |
| 4394 | continue; |
| 4395 | } |
Gaetan Rivet | 0c39ecc | 2020-02-24 17:34:11 +0100 | [diff] [blame^] | 4396 | if (prev_check->action != TCPCHK_ACT_COMMENT && prev_check->action != TCPCHK_ACT_ACTION_KW) |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4397 | break; |
| 4398 | } |
| 4399 | return chk; |
| 4400 | |
| 4401 | error: |
| 4402 | free(chk); |
| 4403 | free(str); |
| 4404 | free(comment); |
| 4405 | return NULL; |
| 4406 | } |
| 4407 | |
| 4408 | /* Parses the "tcp-check" proxy keyword */ |
| 4409 | static int proxy_parse_tcpcheck(char **args, int section, struct proxy *curpx, |
| 4410 | struct proxy *defpx, const char *file, int line, |
| 4411 | char **errmsg) |
| 4412 | { |
| 4413 | struct list *rules = curpx->tcpcheck_rules; |
| 4414 | struct tcpcheck_rule *chk = NULL; |
Gaetan Rivet | 5301b01 | 2020-02-25 17:19:17 +0100 | [diff] [blame] | 4415 | int index, cur_arg, ret = 0; |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4416 | |
| 4417 | if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[0], NULL)) |
| 4418 | ret = 1; |
| 4419 | |
| 4420 | if (curpx == defpx) { |
| 4421 | memprintf(errmsg, "'%s' not allowed in 'defaults' section.", args[0]); |
| 4422 | goto error; |
| 4423 | } |
| 4424 | |
| 4425 | if (!rules) { |
| 4426 | rules = calloc(1, sizeof(*rules)); |
| 4427 | if (!rules) { |
| 4428 | memprintf(errmsg, "%s : out of memory.", args[0]); |
| 4429 | goto error; |
| 4430 | } |
| 4431 | LIST_INIT(rules); |
| 4432 | curpx->tcpcheck_rules = rules; |
| 4433 | } |
| 4434 | |
Gaetan Rivet | 5301b01 | 2020-02-25 17:19:17 +0100 | [diff] [blame] | 4435 | index = 0; |
| 4436 | if (!LIST_ISEMPTY(rules)) { |
| 4437 | chk = LIST_PREV(rules, typeof(chk), list); |
| 4438 | index = chk->index + 1; |
| 4439 | } |
| 4440 | |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4441 | cur_arg = 1; |
| 4442 | if (strcmp(args[cur_arg], "connect") == 0) |
| 4443 | chk = parse_tcpcheck_connect(args, cur_arg, curpx, rules, errmsg); |
| 4444 | else if (strcmp(args[cur_arg], "send") == 0 || strcmp(args[cur_arg], "send-binary") == 0) |
| 4445 | chk = parse_tcpcheck_send(args, cur_arg, rules, errmsg); |
| 4446 | else if (strcmp(args[cur_arg], "expect") == 0) |
| 4447 | chk = parse_tcpcheck_expect(args, cur_arg, rules, errmsg); |
| 4448 | else if (strcmp(args[cur_arg], "comment") == 0) |
| 4449 | chk = parse_tcpcheck_comment(args, cur_arg, rules, errmsg); |
| 4450 | else { |
Gaetan Rivet | 707b52f | 2020-02-21 18:14:59 +0100 | [diff] [blame] | 4451 | struct action_kw *kw = action_kw_tcp_check_lookup(args[cur_arg]); |
| 4452 | |
| 4453 | if (!kw) { |
| 4454 | action_kw_tcp_check_build_list(&trash); |
| 4455 | memprintf(errmsg, "'%s' only supports 'comment', 'connect', 'send', 'send-binary', 'expect'" |
| 4456 | "%s%s. but got '%s'", |
| 4457 | args[0], (*trash.area ? ", " : ""), trash.area, args[1]); |
| 4458 | goto error; |
| 4459 | } |
| 4460 | chk = parse_tcpcheck_action(args, cur_arg, curpx, rules, kw, errmsg); |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4461 | } |
| 4462 | |
| 4463 | if (!chk) { |
| 4464 | memprintf(errmsg, "'%s %s' : %s.", args[0], args[1], *errmsg); |
| 4465 | goto error; |
| 4466 | } |
| 4467 | ret = (*errmsg != NULL); /* Handle warning */ |
| 4468 | |
| 4469 | /* No error: add the tcp-check rule in the list */ |
Gaetan Rivet | 5301b01 | 2020-02-25 17:19:17 +0100 | [diff] [blame] | 4470 | chk->index = index; |
Christopher Faulet | fd6c229 | 2020-03-25 18:20:15 +0100 | [diff] [blame] | 4471 | LIST_ADDQ(rules, &chk->list); |
| 4472 | return ret; |
| 4473 | |
| 4474 | error: |
| 4475 | if (rules) |
| 4476 | deinit_proxy_tcpcheck(curpx); |
| 4477 | return -1; |
| 4478 | } |
| 4479 | |
| 4480 | static struct cfg_kw_list cfg_kws = {ILH, { |
| 4481 | { CFG_LISTEN, "tcp-check", proxy_parse_tcpcheck }, |
| 4482 | { 0, NULL, NULL }, |
| 4483 | }}; |
| 4484 | |
| 4485 | INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws); |
| 4486 | |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 4487 | /* |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 4488 | * Local variables: |
| 4489 | * c-indent-level: 8 |
| 4490 | * c-basic-offset: 8 |
| 4491 | * End: |
| 4492 | */ |