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 | |
Willy Tarreau | c7e4238 | 2012-08-24 19:22:53 +0200 | [diff] [blame] | 33 | #include <common/chunk.h> |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 34 | #include <common/compat.h> |
| 35 | #include <common/config.h> |
| 36 | #include <common/mini-clist.h> |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 37 | #include <common/standard.h> |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 38 | #include <common/time.h> |
Christopher Faulet | cfda847 | 2017-10-20 15:40:23 +0200 | [diff] [blame] | 39 | #include <common/hathreads.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 40 | |
| 41 | #include <types/global.h> |
Baptiste Assmann | a68ca96 | 2015-04-14 01:15:08 +0200 | [diff] [blame] | 42 | #include <types/dns.h> |
William Lallemand | 9ed6203 | 2016-11-21 17:49:11 +0100 | [diff] [blame] | 43 | #include <types/stats.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 44 | |
| 45 | #include <proto/backend.h> |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 46 | #include <proto/checks.h> |
William Lallemand | 9ed6203 | 2016-11-21 17:49:11 +0100 | [diff] [blame] | 47 | #include <proto/stats.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 48 | #include <proto/fd.h> |
| 49 | #include <proto/log.h> |
Willy Tarreau | 53a4766 | 2017-08-28 10:53:00 +0200 | [diff] [blame] | 50 | #include <proto/mux_pt.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 51 | #include <proto/queue.h> |
Willy Tarreau | c6f4ce8 | 2009-06-10 11:09:37 +0200 | [diff] [blame] | 52 | #include <proto/port_range.h> |
Willy Tarreau | e8c66af | 2008-01-13 18:40:14 +0100 | [diff] [blame] | 53 | #include <proto/proto_tcp.h> |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 54 | #include <proto/protocol.h> |
Willy Tarreau | 2b5652f | 2006-12-31 17:46:05 +0100 | [diff] [blame] | 55 | #include <proto/proxy.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 56 | #include <proto/server.h> |
Willy Tarreau | 48d6bf2 | 2016-06-21 16:27:34 +0200 | [diff] [blame] | 57 | #include <proto/signal.h> |
Willy Tarreau | 9e000c6 | 2011-03-10 14:03:36 +0100 | [diff] [blame] | 58 | #include <proto/stream_interface.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 59 | #include <proto/task.h> |
Baptiste Assmann | a68ca96 | 2015-04-14 01:15:08 +0200 | [diff] [blame] | 60 | #include <proto/log.h> |
| 61 | #include <proto/dns.h> |
| 62 | #include <proto/proto_udp.h> |
Olivier Houchard | 9130a96 | 2017-10-17 17:33:43 +0200 | [diff] [blame] | 63 | #include <proto/ssl_sock.h> |
Olivier Houchard | 9130a96 | 2017-10-17 17:33:43 +0200 | [diff] [blame] | 64 | |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 65 | static int httpchk_expect(struct server *s, int done); |
Simon Horman | e16c1b3 | 2015-01-30 11:22:57 +0900 | [diff] [blame] | 66 | static int tcpcheck_get_step_id(struct check *); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 67 | static char * tcpcheck_get_step_comment(struct check *, int); |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 68 | static int tcpcheck_main(struct check *); |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 69 | static void __event_srv_chk_w(struct conn_stream *cs); |
Olivier Houchard | 4501c3e | 2018-08-28 19:36:18 +0200 | [diff] [blame] | 70 | static int wake_srv_chk(struct conn_stream *cs); |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 71 | static void __event_srv_chk_r(struct conn_stream *cs); |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 72 | |
Willy Tarreau | 8ceae72 | 2018-11-26 11:58:30 +0100 | [diff] [blame] | 73 | DECLARE_STATIC_POOL(pool_head_email_alert, "email_alert", sizeof(struct email_alert)); |
| 74 | 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] | 75 | |
| 76 | |
Simon Horman | 63a4a82 | 2012-03-19 07:24:41 +0900 | [diff] [blame] | 77 | static const struct check_status check_statuses[HCHK_STATUS_SIZE] = { |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 78 | [HCHK_STATUS_UNKNOWN] = { CHK_RES_UNKNOWN, "UNK", "Unknown" }, |
| 79 | [HCHK_STATUS_INI] = { CHK_RES_UNKNOWN, "INI", "Initializing" }, |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 80 | [HCHK_STATUS_START] = { /* SPECIAL STATUS*/ }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 81 | |
Willy Tarreau | 2396418 | 2014-05-20 20:56:30 +0200 | [diff] [blame] | 82 | /* Below we have finished checks */ |
| 83 | [HCHK_STATUS_CHECKED] = { CHK_RES_NEUTRAL, "CHECKED", "No status change" }, |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 84 | [HCHK_STATUS_HANA] = { CHK_RES_FAILED, "HANA", "Health analyze" }, |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 85 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 86 | [HCHK_STATUS_SOCKERR] = { CHK_RES_FAILED, "SOCKERR", "Socket error" }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 87 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 88 | [HCHK_STATUS_L4OK] = { CHK_RES_PASSED, "L4OK", "Layer4 check passed" }, |
| 89 | [HCHK_STATUS_L4TOUT] = { CHK_RES_FAILED, "L4TOUT", "Layer4 timeout" }, |
| 90 | [HCHK_STATUS_L4CON] = { CHK_RES_FAILED, "L4CON", "Layer4 connection problem" }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 91 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 92 | [HCHK_STATUS_L6OK] = { CHK_RES_PASSED, "L6OK", "Layer6 check passed" }, |
| 93 | [HCHK_STATUS_L6TOUT] = { CHK_RES_FAILED, "L6TOUT", "Layer6 timeout" }, |
| 94 | [HCHK_STATUS_L6RSP] = { CHK_RES_FAILED, "L6RSP", "Layer6 invalid response" }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 95 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 96 | [HCHK_STATUS_L7TOUT] = { CHK_RES_FAILED, "L7TOUT", "Layer7 timeout" }, |
| 97 | [HCHK_STATUS_L7RSP] = { CHK_RES_FAILED, "L7RSP", "Layer7 invalid response" }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 98 | |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 99 | [HCHK_STATUS_L57DATA] = { /* DUMMY STATUS */ }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 100 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 101 | [HCHK_STATUS_L7OKD] = { CHK_RES_PASSED, "L7OK", "Layer7 check passed" }, |
| 102 | [HCHK_STATUS_L7OKCD] = { CHK_RES_CONDPASS, "L7OKC", "Layer7 check conditionally passed" }, |
| 103 | [HCHK_STATUS_L7STS] = { CHK_RES_FAILED, "L7STS", "Layer7 wrong status" }, |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 104 | |
| 105 | [HCHK_STATUS_PROCERR] = { CHK_RES_FAILED, "PROCERR", "External check error" }, |
| 106 | [HCHK_STATUS_PROCTOUT] = { CHK_RES_FAILED, "PROCTOUT", "External check timeout" }, |
Cyril Bonté | 77010d8 | 2014-08-07 01:55:37 +0200 | [diff] [blame] | 107 | [HCHK_STATUS_PROCOK] = { CHK_RES_PASSED, "PROCOK", "External check passed" }, |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 108 | }; |
| 109 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 110 | const struct extcheck_env extcheck_envs[EXTCHK_SIZE] = { |
| 111 | [EXTCHK_PATH] = { "PATH", EXTCHK_SIZE_EVAL_INIT }, |
| 112 | [EXTCHK_HAPROXY_PROXY_NAME] = { "HAPROXY_PROXY_NAME", EXTCHK_SIZE_EVAL_INIT }, |
| 113 | [EXTCHK_HAPROXY_PROXY_ID] = { "HAPROXY_PROXY_ID", EXTCHK_SIZE_EVAL_INIT }, |
| 114 | [EXTCHK_HAPROXY_PROXY_ADDR] = { "HAPROXY_PROXY_ADDR", EXTCHK_SIZE_EVAL_INIT }, |
| 115 | [EXTCHK_HAPROXY_PROXY_PORT] = { "HAPROXY_PROXY_PORT", EXTCHK_SIZE_EVAL_INIT }, |
| 116 | [EXTCHK_HAPROXY_SERVER_NAME] = { "HAPROXY_SERVER_NAME", EXTCHK_SIZE_EVAL_INIT }, |
| 117 | [EXTCHK_HAPROXY_SERVER_ID] = { "HAPROXY_SERVER_ID", EXTCHK_SIZE_EVAL_INIT }, |
Christopher Faulet | aaae9a0 | 2020-04-26 09:50:31 +0200 | [diff] [blame] | 118 | [EXTCHK_HAPROXY_SERVER_ADDR] = { "HAPROXY_SERVER_ADDR", EXTCHK_SIZE_ADDR }, |
| 119 | [EXTCHK_HAPROXY_SERVER_PORT] = { "HAPROXY_SERVER_PORT", EXTCHK_SIZE_UINT }, |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 120 | [EXTCHK_HAPROXY_SERVER_MAXCONN] = { "HAPROXY_SERVER_MAXCONN", EXTCHK_SIZE_EVAL_INIT }, |
| 121 | [EXTCHK_HAPROXY_SERVER_CURCONN] = { "HAPROXY_SERVER_CURCONN", EXTCHK_SIZE_ULONG }, |
| 122 | }; |
| 123 | |
Simon Horman | 63a4a82 | 2012-03-19 07:24:41 +0900 | [diff] [blame] | 124 | 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] | 125 | [HANA_STATUS_UNKNOWN] = { "Unknown", { 0, 0 }}, |
| 126 | |
| 127 | [HANA_STATUS_L4_OK] = { "L4 successful connection", { 2, 0 }}, |
| 128 | [HANA_STATUS_L4_ERR] = { "L4 unsuccessful connection", { 1, 1 }}, |
| 129 | |
| 130 | [HANA_STATUS_HTTP_OK] = { "Correct http response", { 0, 2 }}, |
| 131 | [HANA_STATUS_HTTP_STS] = { "Wrong http response", { 0, 1 }}, |
| 132 | [HANA_STATUS_HTTP_HDRRSP] = { "Invalid http response (headers)", { 0, 1 }}, |
| 133 | [HANA_STATUS_HTTP_RSP] = { "Invalid http response", { 0, 1 }}, |
| 134 | |
| 135 | [HANA_STATUS_HTTP_READ_ERROR] = { "Read error (http)", { 0, 1 }}, |
| 136 | [HANA_STATUS_HTTP_READ_TIMEOUT] = { "Read timeout (http)", { 0, 1 }}, |
| 137 | [HANA_STATUS_HTTP_BROKEN_PIPE] = { "Close from server (http)", { 0, 1 }}, |
| 138 | }; |
| 139 | |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 140 | /* checks if <err> is a real error for errno or one that can be ignored, and |
| 141 | * return 0 for these ones or <err> for real ones. |
| 142 | */ |
| 143 | static inline int unclean_errno(int err) |
| 144 | { |
| 145 | if (err == EAGAIN || err == EINPROGRESS || |
| 146 | err == EISCONN || err == EALREADY) |
| 147 | return 0; |
| 148 | return err; |
| 149 | } |
| 150 | |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 151 | /* |
| 152 | * Convert check_status code to description |
| 153 | */ |
| 154 | const char *get_check_status_description(short check_status) { |
| 155 | |
| 156 | const char *desc; |
| 157 | |
| 158 | if (check_status < HCHK_STATUS_SIZE) |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 159 | desc = check_statuses[check_status].desc; |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 160 | else |
| 161 | desc = NULL; |
| 162 | |
| 163 | if (desc && *desc) |
| 164 | return desc; |
| 165 | else |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 166 | return check_statuses[HCHK_STATUS_UNKNOWN].desc; |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | /* |
| 170 | * Convert check_status code to short info |
| 171 | */ |
| 172 | const char *get_check_status_info(short check_status) { |
| 173 | |
| 174 | const char *info; |
| 175 | |
| 176 | if (check_status < HCHK_STATUS_SIZE) |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 177 | info = check_statuses[check_status].info; |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 178 | else |
| 179 | info = NULL; |
| 180 | |
| 181 | if (info && *info) |
| 182 | return info; |
| 183 | else |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 184 | return check_statuses[HCHK_STATUS_UNKNOWN].info; |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 185 | } |
| 186 | |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 187 | const char *get_analyze_status(short analyze_status) { |
| 188 | |
| 189 | const char *desc; |
| 190 | |
| 191 | if (analyze_status < HANA_STATUS_SIZE) |
| 192 | desc = analyze_statuses[analyze_status].desc; |
| 193 | else |
| 194 | desc = NULL; |
| 195 | |
| 196 | if (desc && *desc) |
| 197 | return desc; |
| 198 | else |
| 199 | return analyze_statuses[HANA_STATUS_UNKNOWN].desc; |
| 200 | } |
| 201 | |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 202 | /* |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 203 | * Set check->status, update check->duration and fill check->result with |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 204 | * an adequate CHK_RES_* value. The new check->health is computed based |
| 205 | * on the result. |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 206 | * |
| 207 | * Show information in logs about failed health check if server is UP |
| 208 | * or succeeded health checks if server is DOWN. |
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 | 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] | 211 | { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 212 | struct server *s = check->server; |
Willy Tarreau | bef1b32 | 2014-05-13 21:01:39 +0200 | [diff] [blame] | 213 | short prev_status = check->status; |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 214 | int report = 0; |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 215 | |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 216 | if (status == HCHK_STATUS_START) { |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 217 | check->result = CHK_RES_UNKNOWN; /* no result yet */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 218 | check->desc[0] = '\0'; |
| 219 | check->start = now; |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 220 | return; |
| 221 | } |
| 222 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 223 | if (!check->status) |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 224 | return; |
| 225 | |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 226 | if (desc && *desc) { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 227 | strncpy(check->desc, desc, HCHK_DESC_LEN-1); |
| 228 | check->desc[HCHK_DESC_LEN-1] = '\0'; |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 229 | } else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 230 | check->desc[0] = '\0'; |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 231 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 232 | check->status = status; |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 233 | if (check_statuses[status].result) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 234 | check->result = check_statuses[status].result; |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 235 | |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 236 | if (status == HCHK_STATUS_HANA) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 237 | check->duration = -1; |
| 238 | else if (!tv_iszero(&check->start)) { |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 239 | /* set_server_check_status() may be called more than once */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 240 | check->duration = tv_ms_elapsed(&check->start, &now); |
| 241 | tv_zero(&check->start); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 242 | } |
| 243 | |
Willy Tarreau | 2396418 | 2014-05-20 20:56:30 +0200 | [diff] [blame] | 244 | /* no change is expected if no state change occurred */ |
| 245 | if (check->result == CHK_RES_NEUTRAL) |
| 246 | return; |
| 247 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 248 | /* If the check was really just sending a mail, it won't have an |
| 249 | * associated server, so we're done now. |
| 250 | */ |
| 251 | if (!s) |
| 252 | return; |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 253 | report = 0; |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 254 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 255 | switch (check->result) { |
| 256 | case CHK_RES_FAILED: |
Willy Tarreau | 12634e1 | 2014-05-23 11:32:36 +0200 | [diff] [blame] | 257 | /* Failure to connect to the agent as a secondary check should not |
| 258 | * cause the server to be marked down. |
| 259 | */ |
| 260 | if ((!(check->state & CHK_ST_AGENT) || |
Simon Horman | eaabd52 | 2015-02-26 11:26:17 +0900 | [diff] [blame] | 261 | (check->status >= HCHK_STATUS_L57DATA)) && |
Christopher Faulet | b119a79 | 2018-05-02 12:12:45 +0200 | [diff] [blame] | 262 | (check->health > 0)) { |
Olivier Houchard | 7059c55 | 2019-03-08 18:49:32 +0100 | [diff] [blame] | 263 | _HA_ATOMIC_ADD(&s->counters.failed_checks, 1); |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 264 | report = 1; |
| 265 | check->health--; |
| 266 | if (check->health < check->rise) |
| 267 | check->health = 0; |
| 268 | } |
| 269 | break; |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 270 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 271 | case CHK_RES_PASSED: |
| 272 | case CHK_RES_CONDPASS: /* "condpass" cannot make the first step but it OK after a "passed" */ |
| 273 | if ((check->health < check->rise + check->fall - 1) && |
| 274 | (check->result == CHK_RES_PASSED || check->health > 0)) { |
| 275 | report = 1; |
| 276 | check->health++; |
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 | if (check->health >= check->rise) |
| 279 | check->health = check->rise + check->fall - 1; /* OK now */ |
| 280 | } |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 281 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 282 | /* clear consecutive_errors if observing is enabled */ |
| 283 | if (s->onerror) |
| 284 | s->consecutive_errors = 0; |
| 285 | break; |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 286 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 287 | default: |
| 288 | break; |
| 289 | } |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 290 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 291 | if (s->proxy->options2 & PR_O2_LOGHCHKS && |
| 292 | (status != prev_status || report)) { |
| 293 | chunk_printf(&trash, |
Willy Tarreau | 12634e1 | 2014-05-23 11:32:36 +0200 | [diff] [blame] | 294 | "%s check for %sserver %s/%s %s%s", |
| 295 | (check->state & CHK_ST_AGENT) ? "Agent" : "Health", |
Willy Tarreau | c93cd16 | 2014-05-13 15:54:22 +0200 | [diff] [blame] | 296 | s->flags & SRV_F_BACKUP ? "backup " : "", |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 297 | s->proxy->id, s->id, |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 298 | (check->result == CHK_RES_CONDPASS) ? "conditionally ":"", |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 299 | (check->result >= CHK_RES_PASSED) ? "succeeded" : "failed"); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 300 | |
Emeric Brun | 5a13351 | 2017-10-19 14:42:30 +0200 | [diff] [blame] | 301 | srv_append_status(&trash, s, check, -1, 0); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 302 | |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 303 | chunk_appendf(&trash, ", status: %d/%d %s", |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 304 | (check->health >= check->rise) ? check->health - check->rise + 1 : check->health, |
| 305 | (check->health >= check->rise) ? check->fall : check->rise, |
| 306 | (check->health >= check->rise) ? (s->uweight ? "UP" : "DRAIN") : "DOWN"); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 307 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 308 | ha_warning("%s.\n", trash.area); |
| 309 | send_log(s->proxy, LOG_NOTICE, "%s.\n", trash.area); |
| 310 | send_email_alert(s, LOG_INFO, "%s", trash.area); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 311 | } |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 312 | } |
| 313 | |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 314 | /* Marks the check <check>'s server down if the current check is already failed |
| 315 | * and the server is not down yet nor in maintenance. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 316 | */ |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 317 | static void check_notify_failure(struct check *check) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 318 | { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 319 | struct server *s = check->server; |
Simon Horman | e0d1bfb | 2011-06-21 14:34:58 +0900 | [diff] [blame] | 320 | |
Willy Tarreau | 7b1d47c | 2014-05-20 14:55:13 +0200 | [diff] [blame] | 321 | /* The agent secondary check should only cause a server to be marked |
| 322 | * as down if check->status is HCHK_STATUS_L7STS, which indicates |
| 323 | * that the agent returned "fail", "stopped" or "down". |
| 324 | * The implication here is that failure to connect to the agent |
| 325 | * as a secondary check should not cause the server to be marked |
| 326 | * down. */ |
| 327 | if ((check->state & CHK_ST_AGENT) && check->status != HCHK_STATUS_L7STS) |
| 328 | return; |
| 329 | |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 330 | if (check->health > 0) |
| 331 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 332 | |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 333 | /* 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] | 334 | 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] | 335 | } |
| 336 | |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 337 | /* 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] | 338 | * it isn't in maintenance, it is not tracking a down server and other checks |
| 339 | * comply. The rule is simple : by default, a server is up, unless any of the |
| 340 | * following conditions is true : |
| 341 | * - health check failed (check->health < rise) |
| 342 | * - agent check failed (agent->health < rise) |
| 343 | * - the server tracks a down server (track && track->state == STOPPED) |
| 344 | * Note that if the server has a slowstart, it will switch to STARTING instead |
| 345 | * of RUNNING. Also, only the health checks support the nolb mode, so the |
| 346 | * agent's success may not take the server out of this mode. |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 347 | */ |
Willy Tarreau | 3e04838 | 2014-05-21 10:30:54 +0200 | [diff] [blame] | 348 | static void check_notify_success(struct check *check) |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 349 | { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 350 | struct server *s = check->server; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 351 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 352 | if (s->next_admin & SRV_ADMF_MAINT) |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 353 | return; |
Cyril Bonté | cd19e51 | 2010-01-31 22:34:03 +0100 | [diff] [blame] | 354 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 355 | if (s->track && s->track->next_state == SRV_ST_STOPPED) |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 356 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 357 | |
Willy Tarreau | 3e04838 | 2014-05-21 10:30:54 +0200 | [diff] [blame] | 358 | if ((s->check.state & CHK_ST_ENABLED) && (s->check.health < s->check.rise)) |
| 359 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 360 | |
Willy Tarreau | 3e04838 | 2014-05-21 10:30:54 +0200 | [diff] [blame] | 361 | if ((s->agent.state & CHK_ST_ENABLED) && (s->agent.health < s->agent.rise)) |
| 362 | return; |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 363 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 364 | if ((check->state & CHK_ST_AGENT) && s->next_state == SRV_ST_STOPPING) |
Willy Tarreau | 3e04838 | 2014-05-21 10:30:54 +0200 | [diff] [blame] | 365 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 366 | |
Emeric Brun | 5a13351 | 2017-10-19 14:42:30 +0200 | [diff] [blame] | 367 | 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] | 368 | } |
| 369 | |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 370 | /* Marks the check <check> as valid and tries to set its server into stopping mode |
| 371 | * if it was running or starting, and provided it isn't in maintenance and other |
| 372 | * checks comply. The conditions for the server to be marked in stopping mode are |
| 373 | * the same as for it to be turned up. Also, only the health checks support the |
| 374 | * nolb mode. |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 375 | */ |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 376 | static void check_notify_stopping(struct check *check) |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 377 | { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 378 | struct server *s = check->server; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 379 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 380 | if (s->next_admin & SRV_ADMF_MAINT) |
Willy Tarreau | af54958 | 2014-05-16 17:37:50 +0200 | [diff] [blame] | 381 | return; |
| 382 | |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 383 | if (check->state & CHK_ST_AGENT) |
| 384 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 385 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 386 | if (s->track && s->track->next_state == SRV_ST_STOPPED) |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 387 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 388 | |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 389 | if ((s->check.state & CHK_ST_ENABLED) && (s->check.health < s->check.rise)) |
| 390 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 391 | |
Willy Tarreau | db58b79 | 2014-05-21 13:57:23 +0200 | [diff] [blame] | 392 | if ((s->agent.state & CHK_ST_ENABLED) && (s->agent.health < s->agent.rise)) |
| 393 | return; |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 394 | |
Willy Tarreau | b26881a | 2017-12-23 11:16:49 +0100 | [diff] [blame] | 395 | 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] | 396 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 397 | |
Willy Tarreau | 9fe7aae | 2013-12-31 23:47:37 +0100 | [diff] [blame] | 398 | /* note: use health_adjust() only, which first checks that the observe mode is |
| 399 | * enabled. |
| 400 | */ |
| 401 | void __health_adjust(struct server *s, short status) |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 402 | { |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 403 | int failed; |
| 404 | int expire; |
| 405 | |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 406 | if (s->observe >= HANA_OBS_SIZE) |
| 407 | return; |
| 408 | |
Willy Tarreau | bb95666 | 2013-01-24 00:37:39 +0100 | [diff] [blame] | 409 | if (status >= HANA_STATUS_SIZE || !analyze_statuses[status].desc) |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 410 | return; |
| 411 | |
| 412 | switch (analyze_statuses[status].lr[s->observe - 1]) { |
| 413 | case 1: |
| 414 | failed = 1; |
| 415 | break; |
| 416 | |
| 417 | case 2: |
| 418 | failed = 0; |
| 419 | break; |
| 420 | |
| 421 | default: |
| 422 | return; |
| 423 | } |
| 424 | |
| 425 | if (!failed) { |
| 426 | /* good: clear consecutive_errors */ |
| 427 | s->consecutive_errors = 0; |
| 428 | return; |
| 429 | } |
| 430 | |
Olivier Houchard | 7059c55 | 2019-03-08 18:49:32 +0100 | [diff] [blame] | 431 | _HA_ATOMIC_ADD(&s->consecutive_errors, 1); |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 432 | |
| 433 | if (s->consecutive_errors < s->consecutive_errors_limit) |
| 434 | return; |
| 435 | |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 436 | chunk_printf(&trash, "Detected %d consecutive errors, last one was: %s", |
| 437 | s->consecutive_errors, get_analyze_status(status)); |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 438 | |
| 439 | switch (s->onerror) { |
| 440 | case HANA_ONERR_FASTINTER: |
| 441 | /* force fastinter - nothing to do here as all modes force it */ |
| 442 | break; |
| 443 | |
| 444 | case HANA_ONERR_SUDDTH: |
| 445 | /* simulate a pre-fatal failed health check */ |
Simon Horman | 58c3297 | 2013-11-25 10:46:38 +0900 | [diff] [blame] | 446 | if (s->check.health > s->check.rise) |
| 447 | s->check.health = s->check.rise + 1; |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 448 | |
| 449 | /* no break - fall through */ |
| 450 | |
| 451 | case HANA_ONERR_FAILCHK: |
| 452 | /* simulate a failed health check */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 453 | set_server_check_status(&s->check, HCHK_STATUS_HANA, |
| 454 | trash.area); |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 455 | check_notify_failure(&s->check); |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 456 | break; |
| 457 | |
| 458 | case HANA_ONERR_MARKDWN: |
| 459 | /* mark server down */ |
Simon Horman | 58c3297 | 2013-11-25 10:46:38 +0900 | [diff] [blame] | 460 | s->check.health = s->check.rise; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 461 | set_server_check_status(&s->check, HCHK_STATUS_HANA, |
| 462 | trash.area); |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 463 | check_notify_failure(&s->check); |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 464 | break; |
| 465 | |
| 466 | default: |
| 467 | /* write a warning? */ |
| 468 | break; |
| 469 | } |
| 470 | |
| 471 | s->consecutive_errors = 0; |
Olivier Houchard | 7059c55 | 2019-03-08 18:49:32 +0100 | [diff] [blame] | 472 | _HA_ATOMIC_ADD(&s->counters.failed_hana, 1); |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 473 | |
Simon Horman | 6618300 | 2013-02-23 10:16:43 +0900 | [diff] [blame] | 474 | if (s->check.fastinter) { |
| 475 | expire = tick_add(now_ms, MS_TO_TICKS(s->check.fastinter)); |
Sergiy Prykhodko | 1d57e50 | 2013-09-21 12:05:00 +0300 | [diff] [blame] | 476 | if (s->check.task->expire > expire) { |
Willy Tarreau | 5b3a202 | 2012-09-28 15:01:02 +0200 | [diff] [blame] | 477 | s->check.task->expire = expire; |
Sergiy Prykhodko | 1d57e50 | 2013-09-21 12:05:00 +0300 | [diff] [blame] | 478 | /* requeue check task with new expire */ |
| 479 | task_queue(s->check.task); |
| 480 | } |
Krzysztof Piotr Oledzki | 97f07b8 | 2009-12-15 22:31:24 +0100 | [diff] [blame] | 481 | } |
| 482 | } |
| 483 | |
Willy Tarreau | a1dab55 | 2014-04-14 15:04:54 +0200 | [diff] [blame] | 484 | 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] | 485 | { |
| 486 | int sv_state; |
| 487 | int ratio; |
| 488 | int hlen = 0; |
Joseph Lynch | 514061c | 2015-01-15 17:52:59 -0800 | [diff] [blame] | 489 | char addr[46]; |
| 490 | char port[6]; |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 491 | const char *srv_hlt_st[7] = { "DOWN", "DOWN %d/%d", |
| 492 | "UP %d/%d", "UP", |
| 493 | "NOLB %d/%d", "NOLB", |
| 494 | "no check" }; |
| 495 | |
| 496 | memcpy(buffer + hlen, "X-Haproxy-Server-State: ", 24); |
| 497 | hlen += 24; |
| 498 | |
Willy Tarreau | ff5ae35 | 2013-12-11 20:36:34 +0100 | [diff] [blame] | 499 | if (!(s->check.state & CHK_ST_ENABLED)) |
| 500 | sv_state = 6; |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 501 | else if (s->cur_state != SRV_ST_STOPPED) { |
Simon Horman | 58c3297 | 2013-11-25 10:46:38 +0900 | [diff] [blame] | 502 | if (s->check.health == s->check.rise + s->check.fall - 1) |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 503 | sv_state = 3; /* UP */ |
| 504 | else |
| 505 | sv_state = 2; /* going down */ |
| 506 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 507 | if (s->cur_state == SRV_ST_STOPPING) |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 508 | sv_state += 2; |
| 509 | } else { |
Simon Horman | 125d099 | 2013-02-24 17:23:38 +0900 | [diff] [blame] | 510 | if (s->check.health) |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 511 | sv_state = 1; /* going up */ |
| 512 | else |
| 513 | sv_state = 0; /* DOWN */ |
| 514 | } |
| 515 | |
Willy Tarreau | a1dab55 | 2014-04-14 15:04:54 +0200 | [diff] [blame] | 516 | hlen += snprintf(buffer + hlen, size - hlen, |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 517 | srv_hlt_st[sv_state], |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 518 | (s->cur_state != SRV_ST_STOPPED) ? (s->check.health - s->check.rise + 1) : (s->check.health), |
| 519 | (s->cur_state != SRV_ST_STOPPED) ? (s->check.fall) : (s->check.rise)); |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 520 | |
Joseph Lynch | 514061c | 2015-01-15 17:52:59 -0800 | [diff] [blame] | 521 | addr_to_str(&s->addr, addr, sizeof(addr)); |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 522 | if (s->addr.ss_family == AF_INET || s->addr.ss_family == AF_INET6) |
| 523 | snprintf(port, sizeof(port), "%u", s->svc_port); |
| 524 | else |
| 525 | *port = 0; |
Joseph Lynch | 514061c | 2015-01-15 17:52:59 -0800 | [diff] [blame] | 526 | |
| 527 | hlen += snprintf(buffer + hlen, size - hlen, "; address=%s; port=%s; name=%s/%s; node=%s; weight=%d/%d; scur=%d/%d; qcur=%d", |
| 528 | addr, port, s->proxy->id, s->id, |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 529 | global.node, |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 530 | (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] | 531 | (s->proxy->lbprm.tot_weight * s->proxy->lbprm.wmult + s->proxy->lbprm.wdiv - 1) / s->proxy->lbprm.wdiv, |
| 532 | s->cur_sess, s->proxy->beconn - s->proxy->nbpend, |
| 533 | s->nbpend); |
| 534 | |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 535 | if ((s->cur_state == SRV_ST_STARTING) && |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 536 | now.tv_sec < s->last_change + s->slowstart && |
| 537 | now.tv_sec >= s->last_change) { |
| 538 | ratio = MAX(1, 100 * (now.tv_sec - s->last_change) / s->slowstart); |
Willy Tarreau | a1dab55 | 2014-04-14 15:04:54 +0200 | [diff] [blame] | 539 | hlen += snprintf(buffer + hlen, size - hlen, "; throttle=%d%%", ratio); |
Willy Tarreau | ef78104 | 2010-01-27 11:53:01 +0100 | [diff] [blame] | 540 | } |
| 541 | |
| 542 | buffer[hlen++] = '\r'; |
| 543 | buffer[hlen++] = '\n'; |
| 544 | |
| 545 | return hlen; |
| 546 | } |
| 547 | |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 548 | /* Check the connection. If an error has already been reported or the socket is |
| 549 | * closed, keep errno intact as it is supposed to contain the valid error code. |
| 550 | * If no error is reported, check the socket's error queue using getsockopt(). |
| 551 | * Warning, this must be done only once when returning from poll, and never |
| 552 | * after an I/O error was attempted, otherwise the error queue might contain |
| 553 | * inconsistent errors. If an error is detected, the CO_FL_ERROR is set on the |
| 554 | * socket. Returns non-zero if an error was reported, zero if everything is |
| 555 | * clean (including a properly closed socket). |
| 556 | */ |
| 557 | static int retrieve_errno_from_socket(struct connection *conn) |
| 558 | { |
| 559 | int skerr; |
| 560 | socklen_t lskerr = sizeof(skerr); |
| 561 | |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 562 | if (conn->flags & CO_FL_ERROR && (unclean_errno(errno) || !conn->ctrl)) |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 563 | return 1; |
| 564 | |
Willy Tarreau | 3c72872 | 2014-01-23 13:50:42 +0100 | [diff] [blame] | 565 | if (!conn_ctrl_ready(conn)) |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 566 | return 0; |
| 567 | |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 568 | if (getsockopt(conn->handle.fd, SOL_SOCKET, SO_ERROR, &skerr, &lskerr) == 0) |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 569 | errno = skerr; |
| 570 | |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 571 | errno = unclean_errno(errno); |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 572 | |
| 573 | if (!errno) { |
| 574 | /* we could not retrieve an error, that does not mean there is |
| 575 | * none. Just don't change anything and only report the prior |
| 576 | * error if any. |
| 577 | */ |
| 578 | if (conn->flags & CO_FL_ERROR) |
| 579 | return 1; |
| 580 | else |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | conn->flags |= CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_SOCK_RD_SH; |
| 585 | return 1; |
| 586 | } |
| 587 | |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 588 | /* Try to collect as much information as possible on the connection status, |
| 589 | * and adjust the server status accordingly. It may make use of <errno_bck> |
| 590 | * if non-null when the caller is absolutely certain of its validity (eg: |
| 591 | * checked just after a syscall). If the caller doesn't have a valid errno, |
| 592 | * it can pass zero, and retrieve_errno_from_socket() will be called to try |
| 593 | * to extract errno from the socket. If no error is reported, it will consider |
| 594 | * the <expired> flag. This is intended to be used when a connection error was |
| 595 | * reported in conn->flags or when a timeout was reported in <expired>. The |
| 596 | * function takes care of not updating a server status which was already set. |
| 597 | * All situations where at least one of <expired> or CO_FL_ERROR are set |
| 598 | * produce a status. |
| 599 | */ |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 600 | 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] | 601 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 602 | struct conn_stream *cs = check->cs; |
| 603 | struct connection *conn = cs_conn(cs); |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 604 | const char *err_msg; |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 605 | struct buffer *chk; |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 606 | int step; |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 607 | char *comment; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 608 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 609 | if (check->result != CHK_RES_UNKNOWN) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 610 | return; |
| 611 | |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 612 | errno = unclean_errno(errno_bck); |
| 613 | if (conn && errno) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 614 | retrieve_errno_from_socket(conn); |
| 615 | |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 616 | if (conn && !(conn->flags & CO_FL_ERROR) && |
| 617 | !(cs->flags & CS_FL_ERROR) && !expired) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 618 | return; |
| 619 | |
| 620 | /* we'll try to build a meaningful error message depending on the |
| 621 | * context of the error possibly present in conn->err_code, and the |
| 622 | * socket error possibly collected above. This is useful to know the |
| 623 | * exact step of the L6 layer (eg: SSL handshake). |
| 624 | */ |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 625 | chk = get_trash_chunk(); |
| 626 | |
| 627 | if (check->type == PR_O2_TCPCHK_CHK) { |
Simon Horman | e16c1b3 | 2015-01-30 11:22:57 +0900 | [diff] [blame] | 628 | step = tcpcheck_get_step_id(check); |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 629 | if (!step) |
| 630 | chunk_printf(chk, " at initial connection step of tcp-check"); |
| 631 | else { |
| 632 | chunk_printf(chk, " at step %d of tcp-check", step); |
| 633 | /* we were looking for a string */ |
| 634 | if (check->last_started_step && check->last_started_step->action == TCPCHK_ACT_CONNECT) { |
| 635 | if (check->last_started_step->port) |
| 636 | chunk_appendf(chk, " (connect port %d)" ,check->last_started_step->port); |
| 637 | else |
| 638 | chunk_appendf(chk, " (connect)"); |
| 639 | } |
| 640 | else if (check->last_started_step && check->last_started_step->action == TCPCHK_ACT_EXPECT) { |
| 641 | if (check->last_started_step->string) |
Baptiste Assmann | 96a5c9b | 2015-05-01 08:09:29 +0200 | [diff] [blame] | 642 | chunk_appendf(chk, " (expect string '%s')", check->last_started_step->string); |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 643 | else if (check->last_started_step->expect_regex) |
| 644 | chunk_appendf(chk, " (expect regex)"); |
| 645 | } |
| 646 | else if (check->last_started_step && check->last_started_step->action == TCPCHK_ACT_SEND) { |
| 647 | chunk_appendf(chk, " (send)"); |
| 648 | } |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 649 | |
| 650 | comment = tcpcheck_get_step_comment(check, step); |
| 651 | if (comment) |
| 652 | chunk_appendf(chk, " comment: '%s'", comment); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 653 | } |
| 654 | } |
| 655 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 656 | if (conn && conn->err_code) { |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 657 | if (unclean_errno(errno)) |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 658 | chunk_printf(&trash, "%s (%s)%s", conn_err_code_str(conn), strerror(errno), |
| 659 | chk->area); |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 660 | else |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 661 | chunk_printf(&trash, "%s%s", conn_err_code_str(conn), |
| 662 | chk->area); |
| 663 | err_msg = trash.area; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 664 | } |
| 665 | else { |
Willy Tarreau | c8dc20a | 2019-12-27 12:03:27 +0100 | [diff] [blame] | 666 | if (unclean_errno(errno)) { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 667 | chunk_printf(&trash, "%s%s", strerror(errno), |
| 668 | chk->area); |
| 669 | err_msg = trash.area; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 670 | } |
| 671 | else { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 672 | err_msg = chk->area; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 673 | } |
| 674 | } |
| 675 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 676 | if (check->state & CHK_ST_PORT_MISS) { |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 677 | /* NOTE: this is reported after <fall> tries */ |
| 678 | chunk_printf(chk, "No port available for the TCP connection"); |
| 679 | set_server_check_status(check, HCHK_STATUS_SOCKERR, err_msg); |
| 680 | } |
| 681 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 682 | if (!conn) { |
| 683 | /* connection allocation error before the connection was established */ |
| 684 | set_server_check_status(check, HCHK_STATUS_SOCKERR, err_msg); |
| 685 | } |
Willy Tarreau | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 686 | else if (conn->flags & CO_FL_WAIT_L4_CONN) { |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 687 | /* L4 not established (yet) */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 688 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 689 | set_server_check_status(check, HCHK_STATUS_L4CON, err_msg); |
| 690 | else if (expired) |
| 691 | set_server_check_status(check, HCHK_STATUS_L4TOUT, err_msg); |
Baptiste Assmann | a68ca96 | 2015-04-14 01:15:08 +0200 | [diff] [blame] | 692 | |
| 693 | /* |
| 694 | * might be due to a server IP change. |
| 695 | * Let's trigger a DNS resolution if none are currently running. |
| 696 | */ |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 697 | if (check->server) |
| 698 | dns_trigger_resolution(check->server->dns_requester); |
Baptiste Assmann | a68ca96 | 2015-04-14 01:15:08 +0200 | [diff] [blame] | 699 | |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 700 | } |
Willy Tarreau | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 701 | else if (conn->flags & CO_FL_WAIT_L6_CONN) { |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 702 | /* L6 not established (yet) */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 703 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 704 | set_server_check_status(check, HCHK_STATUS_L6RSP, err_msg); |
| 705 | else if (expired) |
| 706 | set_server_check_status(check, HCHK_STATUS_L6TOUT, err_msg); |
| 707 | } |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 708 | else if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) { |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 709 | /* I/O error after connection was established and before we could diagnose */ |
| 710 | set_server_check_status(check, HCHK_STATUS_SOCKERR, err_msg); |
| 711 | } |
| 712 | else if (expired) { |
| 713 | /* connection established but expired check */ |
| 714 | if (check->type == PR_O2_SSL3_CHK) |
| 715 | set_server_check_status(check, HCHK_STATUS_L6TOUT, err_msg); |
| 716 | else /* HTTP, SMTP, ... */ |
| 717 | set_server_check_status(check, HCHK_STATUS_L7TOUT, err_msg); |
| 718 | } |
| 719 | |
| 720 | return; |
| 721 | } |
| 722 | |
Olivier Houchard | 5c110b9 | 2018-08-14 17:04:58 +0200 | [diff] [blame] | 723 | /* This function checks if any I/O is wanted, and if so, attempts to do so */ |
| 724 | 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] | 725 | { |
Olivier Houchard | 26e1a8f | 2018-09-12 15:15:12 +0200 | [diff] [blame] | 726 | struct check *check = ctx; |
| 727 | struct conn_stream *cs = check->cs; |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 728 | struct email_alertq *q = container_of(check, typeof(*q), check); |
Olivier Houchard | bc89ad8 | 2019-07-09 17:28:51 +0200 | [diff] [blame] | 729 | int ret = 0; |
Olivier Houchard | 4501c3e | 2018-08-28 19:36:18 +0200 | [diff] [blame] | 730 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 731 | if (!(check->wait_list.events & SUB_RETRY_SEND)) |
Olivier Houchard | bc89ad8 | 2019-07-09 17:28:51 +0200 | [diff] [blame] | 732 | ret = wake_srv_chk(cs); |
| 733 | if (ret == 0 && !(check->wait_list.events & SUB_RETRY_RECV)) { |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 734 | if (check->server) |
| 735 | HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock); |
| 736 | else |
| 737 | HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 738 | __event_srv_chk_r(cs); |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 739 | if (check->server) |
| 740 | HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock); |
| 741 | else |
| 742 | HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 743 | } |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 744 | return NULL; |
| 745 | } |
| 746 | |
| 747 | /* same as above but protected by the server lock. |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 748 | * |
| 749 | * 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] | 750 | * via the out label. NOTE THAT THIS FUNCTION DOESN'T LOCK, YOU PROBABLY WANT |
| 751 | * TO USE event_srv_chk_w() instead. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 752 | */ |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 753 | static void __event_srv_chk_w(struct conn_stream *cs) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 754 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 755 | struct connection *conn = cs->conn; |
| 756 | struct check *check = cs->data; |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 757 | struct server *s = check->server; |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 758 | struct task *t = check->task; |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 759 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 760 | if (unlikely(check->result == CHK_RES_FAILED)) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 761 | goto out_wakeup; |
| 762 | |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 763 | if (retrieve_errno_from_socket(conn)) { |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 764 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | 20a1834 | 2013-12-05 00:31:46 +0100 | [diff] [blame] | 765 | goto out_wakeup; |
| 766 | } |
Krzysztof Piotr Oledzki | 6492db5 | 2010-01-02 22:03:01 +0100 | [diff] [blame] | 767 | |
Willy Tarreau | 06559ac | 2013-12-05 01:53:08 +0100 | [diff] [blame] | 768 | /* here, we know that the connection is established. That's enough for |
| 769 | * a pure TCP check. |
| 770 | */ |
| 771 | if (!check->type) |
| 772 | goto out_wakeup; |
| 773 | |
Willy Tarreau | c09572f | 2017-10-04 11:58:22 +0200 | [diff] [blame] | 774 | /* wake() will take care of calling tcpcheck_main() */ |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 775 | if (check->type == PR_O2_TCPCHK_CHK) |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 776 | goto out; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 777 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 778 | if (b_data(&check->bo)) { |
Olivier Houchard | ed0f207 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 779 | 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] | 780 | b_realign_if_empty(&check->bo); |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 781 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) { |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 782 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 783 | goto out_wakeup; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 784 | } |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 785 | if (b_data(&check->bo)) { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 786 | conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list); |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 787 | goto out; |
| 788 | } |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 789 | } |
Willy Tarreau | 6996e15 | 2007-04-30 14:37:43 +0200 | [diff] [blame] | 790 | |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 791 | /* full request sent, we allow up to <timeout.check> if nonzero for a response */ |
| 792 | if (s->proxy->timeout.check) { |
| 793 | t->expire = tick_add_ifset(now_ms, s->proxy->timeout.check); |
| 794 | task_queue(t); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 795 | } |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 796 | goto out; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 797 | |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 798 | out_wakeup: |
Willy Tarreau | fdccded | 2008-08-29 18:19:04 +0200 | [diff] [blame] | 799 | task_wakeup(t, TASK_WOKEN_IO); |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 800 | out: |
| 801 | return; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 802 | } |
| 803 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 804 | /* |
Willy Tarreau | f3c6920 | 2006-07-09 16:42:34 +0200 | [diff] [blame] | 805 | * 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] | 806 | * 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] | 807 | * set_server_check_status() to update check->status, check->duration |
| 808 | * and check->result. |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 809 | |
| 810 | * The set_server_check_status function is called with HCHK_STATUS_L7OKD if |
| 811 | * an HTTP server replies HTTP 2xx or 3xx (valid responses), if an SMTP server |
| 812 | * returns 2xx, HCHK_STATUS_L6OK if an SSL server returns at least 5 bytes in |
| 813 | * response to an SSL HELLO (the principle is that this is enough to |
| 814 | * distinguish between an SSL server and a pure TCP relay). All other cases will |
| 815 | * call it with a proper error status like HCHK_STATUS_L7STS, HCHK_STATUS_L6RSP, |
| 816 | * etc. |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 817 | * |
| 818 | * 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] | 819 | * via the out label. |
| 820 | * |
| 821 | * This must be called with the server lock held. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 822 | */ |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 823 | static void __event_srv_chk_r(struct conn_stream *cs) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 824 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 825 | struct connection *conn = cs->conn; |
| 826 | struct check *check = cs->data; |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 827 | struct server *s = check->server; |
| 828 | struct task *t = check->task; |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 829 | char *desc; |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 830 | int done; |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 831 | unsigned short msglen; |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 832 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 833 | if (unlikely(check->result == CHK_RES_FAILED)) |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 834 | goto out_wakeup; |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 835 | |
Willy Tarreau | c09572f | 2017-10-04 11:58:22 +0200 | [diff] [blame] | 836 | /* wake() will take care of calling tcpcheck_main() */ |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 837 | if (check->type == PR_O2_TCPCHK_CHK) |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 838 | goto out; |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 839 | |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 840 | /* Warning! Linux returns EAGAIN on SO_ERROR if data are still available |
| 841 | * but the connection was closed on the remote end. Fortunately, recv still |
| 842 | * works correctly and we don't need to do the getsockopt() on linux. |
| 843 | */ |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 844 | |
| 845 | /* Set buffer to point to the end of the data already read, and check |
| 846 | * that there is free space remaining. If the buffer is full, proceed |
| 847 | * with running the checks without attempting another socket read. |
| 848 | */ |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 849 | |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 850 | done = 0; |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 851 | |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 852 | 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] | 853 | 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] | 854 | done = 1; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 855 | 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] | 856 | /* Report network errors only if we got no other data. Otherwise |
| 857 | * we'll let the upper layers decide whether the response is OK |
| 858 | * or not. It is very common that an RST sent by the server is |
| 859 | * reported as an error just after the last data chunk. |
| 860 | */ |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 861 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | c1a0796 | 2010-03-16 20:55:43 +0100 | [diff] [blame] | 862 | goto out_wakeup; |
| 863 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 864 | } |
| 865 | |
Willy Tarreau | 0f0393f | 2019-09-24 10:43:03 +0200 | [diff] [blame] | 866 | /* the rest of the code below expects the connection to be ready! */ |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 867 | if (conn->flags & CO_FL_WAIT_XPRT && !done) |
Willy Tarreau | 0f0393f | 2019-09-24 10:43:03 +0200 | [diff] [blame] | 868 | goto wait_more_data; |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 869 | |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 870 | /* Intermediate or complete response received. |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 871 | * Terminate string in b_head(&check->bi) buffer. |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 872 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 873 | if (b_data(&check->bi) < b_size(&check->bi)) |
| 874 | b_head(&check->bi)[b_data(&check->bi)] = '\0'; |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 875 | else { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 876 | b_head(&check->bi)[b_data(&check->bi) - 1] = '\0'; |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 877 | done = 1; /* buffer full, don't wait for more data */ |
| 878 | } |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 879 | |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 880 | /* Run the checks... */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 881 | switch (check->type) { |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 882 | case PR_O2_HTTP_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 883 | if (!done && b_data(&check->bi) < strlen("HTTP/1.0 000\r")) |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 884 | goto wait_more_data; |
| 885 | |
Willy Tarreau | c7dd71a | 2007-11-30 08:33:21 +0100 | [diff] [blame] | 886 | /* Check if the server speaks HTTP 1.X */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 887 | if ((b_data(&check->bi) < strlen("HTTP/1.0 000\r")) || |
| 888 | (memcmp(b_head(&check->bi), "HTTP/1.", 7) != 0 || |
| 889 | (*(b_head(&check->bi) + 12) != ' ' && *(b_head(&check->bi) + 12) != '\r')) || |
| 890 | !isdigit((unsigned char) *(b_head(&check->bi) + 9)) || !isdigit((unsigned char) *(b_head(&check->bi) + 10)) || |
| 891 | !isdigit((unsigned char) *(b_head(&check->bi) + 11))) { |
| 892 | cut_crlf(b_head(&check->bi)); |
| 893 | 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] | 894 | |
Willy Tarreau | c7dd71a | 2007-11-30 08:33:21 +0100 | [diff] [blame] | 895 | goto out_wakeup; |
| 896 | } |
| 897 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 898 | check->code = str2uic(b_head(&check->bi) + 9); |
| 899 | desc = ltrim(b_head(&check->bi) + 12, ' '); |
Christopher Faulet | c2a89a6 | 2017-10-23 15:54:24 +0200 | [diff] [blame] | 900 | |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 901 | if ((s->proxy->options & PR_O_DISABLE404) && |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 902 | (s->next_state != SRV_ST_STOPPED) && (check->code == 404)) { |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 903 | /* 404 may be accepted as "stopping" only if the server was up */ |
| 904 | cut_crlf(desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 905 | set_server_check_status(check, HCHK_STATUS_L7OKCD, desc); |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 906 | } |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 907 | else if (s->proxy->options2 & PR_O2_EXP_TYPE) { |
| 908 | /* Run content verification check... We know we have at least 13 chars */ |
| 909 | if (!httpchk_expect(s, done)) |
| 910 | goto wait_more_data; |
| 911 | } |
| 912 | /* check the reply : HTTP/1.X 2xx and 3xx are OK */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 913 | 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] | 914 | cut_crlf(desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 915 | set_server_check_status(check, HCHK_STATUS_L7OKD, desc); |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 916 | } |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 917 | else { |
| 918 | cut_crlf(desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 919 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 920 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 921 | break; |
| 922 | |
| 923 | case PR_O2_SSL3_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 924 | if (!done && b_data(&check->bi) < 5) |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 925 | goto wait_more_data; |
| 926 | |
Willy Tarreau | c7dd71a | 2007-11-30 08:33:21 +0100 | [diff] [blame] | 927 | /* Check for SSLv3 alert or handshake */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 928 | 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] | 929 | set_server_check_status(check, HCHK_STATUS_L6OK, NULL); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 930 | else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 931 | set_server_check_status(check, HCHK_STATUS_L6RSP, NULL); |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 932 | break; |
| 933 | |
| 934 | case PR_O2_SMTP_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 935 | if (!done && b_data(&check->bi) < strlen("000\r")) |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 936 | goto wait_more_data; |
| 937 | |
Willy Tarreau | 5488a62 | 2019-08-06 16:26:31 +0200 | [diff] [blame] | 938 | /* do not reset when closing, servers don't like this */ |
| 939 | if (conn_ctrl_ready(cs->conn)) |
| 940 | fdtab[cs->conn->handle.fd].linger_risk = 0; |
| 941 | |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 942 | /* Check if the server speaks SMTP */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 943 | if ((b_data(&check->bi) < strlen("000\r")) || |
| 944 | (*(b_head(&check->bi) + 3) != ' ' && *(b_head(&check->bi) + 3) != '\r') || |
| 945 | !isdigit((unsigned char) *b_head(&check->bi)) || !isdigit((unsigned char) *(b_head(&check->bi) + 1)) || |
| 946 | !isdigit((unsigned char) *(b_head(&check->bi) + 2))) { |
| 947 | cut_crlf(b_head(&check->bi)); |
| 948 | 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] | 949 | goto out_wakeup; |
| 950 | } |
| 951 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 952 | check->code = str2uic(b_head(&check->bi)); |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 953 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 954 | desc = ltrim(b_head(&check->bi) + 3, ' '); |
Krzysztof Piotr Oledzki | f7089f5 | 2009-10-10 21:06:49 +0200 | [diff] [blame] | 955 | cut_crlf(desc); |
| 956 | |
Willy Tarreau | c7dd71a | 2007-11-30 08:33:21 +0100 | [diff] [blame] | 957 | /* Check for SMTP code 2xx (should be 250) */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 958 | if (*b_head(&check->bi) == '2') |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 959 | set_server_check_status(check, HCHK_STATUS_L7OKD, desc); |
Krzysztof Piotr Oledzki | 213014e | 2009-09-27 15:50:02 +0200 | [diff] [blame] | 960 | else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 961 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 962 | break; |
| 963 | |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 964 | case PR_O2_LB_AGENT_CHK: { |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 965 | int status = HCHK_STATUS_CHECKED; |
| 966 | const char *hs = NULL; /* health status */ |
| 967 | const char *as = NULL; /* admin status */ |
| 968 | const char *ps = NULL; /* performance status */ |
Nenad Merdanovic | 174dd37 | 2016-04-24 23:10:06 +0200 | [diff] [blame] | 969 | const char *cs = NULL; /* maxconn */ |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 970 | const char *err = NULL; /* first error to report */ |
| 971 | const char *wrn = NULL; /* first warning to report */ |
| 972 | char *cmd, *p; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 973 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 974 | /* We're getting an agent check response. The agent could |
| 975 | * have been disabled in the mean time with a long check |
| 976 | * still pending. It is important that we ignore the whole |
| 977 | * response. |
| 978 | */ |
| 979 | if (!(check->server->agent.state & CHK_ST_ENABLED)) |
| 980 | break; |
| 981 | |
| 982 | /* The agent supports strings made of a single line ended by the |
| 983 | * first CR ('\r') or LF ('\n'). This line is composed of words |
| 984 | * delimited by spaces (' '), tabs ('\t'), or commas (','). The |
| 985 | * line may optionally contained a description of a state change |
| 986 | * after a sharp ('#'), which is only considered if a health state |
| 987 | * is announced. |
| 988 | * |
| 989 | * Words may be composed of : |
| 990 | * - a numeric weight suffixed by the percent character ('%'). |
| 991 | * - a health status among "up", "down", "stopped", and "fail". |
| 992 | * - an admin status among "ready", "drain", "maint". |
| 993 | * |
| 994 | * These words may appear in any order. If multiple words of the |
| 995 | * same category appear, the last one wins. |
| 996 | */ |
| 997 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 998 | p = b_head(&check->bi); |
Willy Tarreau | 9809b78 | 2013-12-11 21:40:11 +0100 | [diff] [blame] | 999 | while (*p && *p != '\n' && *p != '\r') |
| 1000 | p++; |
| 1001 | |
| 1002 | if (!*p) { |
| 1003 | if (!done) |
| 1004 | goto wait_more_data; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1005 | |
Willy Tarreau | 9809b78 | 2013-12-11 21:40:11 +0100 | [diff] [blame] | 1006 | /* at least inform the admin that the agent is mis-behaving */ |
| 1007 | set_server_check_status(check, check->status, "Ignoring incomplete line from agent"); |
| 1008 | break; |
| 1009 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1010 | |
Willy Tarreau | 9809b78 | 2013-12-11 21:40:11 +0100 | [diff] [blame] | 1011 | *p = 0; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1012 | cmd = b_head(&check->bi); |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1013 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1014 | while (*cmd) { |
| 1015 | /* look for next word */ |
| 1016 | if (*cmd == ' ' || *cmd == '\t' || *cmd == ',') { |
| 1017 | cmd++; |
| 1018 | continue; |
| 1019 | } |
Simon Horman | 671b6f0 | 2013-11-25 10:46:39 +0900 | [diff] [blame] | 1020 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1021 | if (*cmd == '#') { |
| 1022 | /* this is the beginning of a health status description, |
| 1023 | * skip the sharp and blanks. |
| 1024 | */ |
| 1025 | cmd++; |
| 1026 | while (*cmd == '\t' || *cmd == ' ') |
| 1027 | cmd++; |
Simon Horman | 671b6f0 | 2013-11-25 10:46:39 +0900 | [diff] [blame] | 1028 | break; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1029 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1030 | |
| 1031 | /* find the end of the word so that we have a null-terminated |
| 1032 | * word between <cmd> and <p>. |
| 1033 | */ |
| 1034 | p = cmd + 1; |
| 1035 | while (*p && *p != '\t' && *p != ' ' && *p != '\n' && *p != ',') |
| 1036 | p++; |
| 1037 | if (*p) |
| 1038 | *p++ = 0; |
| 1039 | |
| 1040 | /* first, health statuses */ |
| 1041 | if (strcasecmp(cmd, "up") == 0) { |
| 1042 | check->health = check->rise + check->fall - 1; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1043 | status = HCHK_STATUS_L7OKD; |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1044 | hs = cmd; |
| 1045 | } |
| 1046 | else if (strcasecmp(cmd, "down") == 0) { |
| 1047 | check->health = 0; |
| 1048 | status = HCHK_STATUS_L7STS; |
| 1049 | hs = cmd; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1050 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1051 | else if (strcasecmp(cmd, "stopped") == 0) { |
| 1052 | check->health = 0; |
| 1053 | status = HCHK_STATUS_L7STS; |
| 1054 | hs = cmd; |
| 1055 | } |
| 1056 | else if (strcasecmp(cmd, "fail") == 0) { |
| 1057 | check->health = 0; |
| 1058 | status = HCHK_STATUS_L7STS; |
| 1059 | hs = cmd; |
| 1060 | } |
| 1061 | /* admin statuses */ |
| 1062 | else if (strcasecmp(cmd, "ready") == 0) { |
| 1063 | as = cmd; |
| 1064 | } |
| 1065 | else if (strcasecmp(cmd, "drain") == 0) { |
| 1066 | as = cmd; |
| 1067 | } |
| 1068 | else if (strcasecmp(cmd, "maint") == 0) { |
| 1069 | as = cmd; |
| 1070 | } |
Nenad Merdanovic | 174dd37 | 2016-04-24 23:10:06 +0200 | [diff] [blame] | 1071 | /* try to parse a weight here and keep the last one */ |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1072 | else if (isdigit((unsigned char)*cmd) && strchr(cmd, '%') != NULL) { |
| 1073 | ps = cmd; |
| 1074 | } |
Nenad Merdanovic | 174dd37 | 2016-04-24 23:10:06 +0200 | [diff] [blame] | 1075 | /* try to parse a maxconn here */ |
| 1076 | else if (strncasecmp(cmd, "maxconn:", strlen("maxconn:")) == 0) { |
| 1077 | cs = cmd; |
| 1078 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1079 | else { |
| 1080 | /* keep a copy of the first error */ |
| 1081 | if (!err) |
| 1082 | err = cmd; |
| 1083 | } |
| 1084 | /* skip to next word */ |
| 1085 | cmd = p; |
| 1086 | } |
| 1087 | /* here, cmd points either to \0 or to the beginning of a |
| 1088 | * description. Skip possible leading spaces. |
| 1089 | */ |
| 1090 | while (*cmd == ' ' || *cmd == '\n') |
| 1091 | cmd++; |
| 1092 | |
| 1093 | /* First, update the admin status so that we avoid sending other |
| 1094 | * possibly useless warnings and can also update the health if |
| 1095 | * present after going back up. |
| 1096 | */ |
| 1097 | if (as) { |
| 1098 | if (strcasecmp(as, "drain") == 0) |
| 1099 | srv_adm_set_drain(check->server); |
| 1100 | else if (strcasecmp(as, "maint") == 0) |
| 1101 | srv_adm_set_maint(check->server); |
| 1102 | else |
| 1103 | srv_adm_set_ready(check->server); |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1104 | } |
| 1105 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1106 | /* now change weights */ |
| 1107 | if (ps) { |
| 1108 | const char *msg; |
| 1109 | |
| 1110 | msg = server_parse_weight_change_request(s, ps); |
| 1111 | if (!wrn || !*wrn) |
| 1112 | wrn = msg; |
| 1113 | } |
| 1114 | |
Nenad Merdanovic | 174dd37 | 2016-04-24 23:10:06 +0200 | [diff] [blame] | 1115 | if (cs) { |
| 1116 | const char *msg; |
| 1117 | |
| 1118 | cs += strlen("maxconn:"); |
| 1119 | |
| 1120 | msg = server_parse_maxconn_change_request(s, cs); |
| 1121 | if (!wrn || !*wrn) |
| 1122 | wrn = msg; |
| 1123 | } |
| 1124 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1125 | /* and finally health status */ |
| 1126 | if (hs) { |
| 1127 | /* We'll report some of the warnings and errors we have |
| 1128 | * here. Down reports are critical, we leave them untouched. |
| 1129 | * Lack of report, or report of 'UP' leaves the room for |
| 1130 | * ERR first, then WARN. |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1131 | */ |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1132 | const char *msg = cmd; |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 1133 | struct buffer *t; |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1134 | |
| 1135 | if (!*msg || status == HCHK_STATUS_L7OKD) { |
| 1136 | if (err && *err) |
| 1137 | msg = err; |
| 1138 | else if (wrn && *wrn) |
| 1139 | msg = wrn; |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1140 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1141 | |
| 1142 | t = get_trash_chunk(); |
| 1143 | chunk_printf(t, "via agent : %s%s%s%s", |
| 1144 | hs, *msg ? " (" : "", |
| 1145 | msg, *msg ? ")" : ""); |
| 1146 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1147 | set_server_check_status(check, status, t->area); |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1148 | } |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1149 | else if (err && *err) { |
| 1150 | /* No status change but we'd like to report something odd. |
| 1151 | * Just report the current state and copy the message. |
| 1152 | */ |
| 1153 | chunk_printf(&trash, "agent reports an error : %s", err); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1154 | set_server_check_status(check, status/*check->status*/, |
| 1155 | trash.area); |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1156 | |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1157 | } |
| 1158 | else if (wrn && *wrn) { |
| 1159 | /* No status change but we'd like to report something odd. |
| 1160 | * Just report the current state and copy the message. |
| 1161 | */ |
| 1162 | chunk_printf(&trash, "agent warns : %s", wrn); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1163 | set_server_check_status(check, status/*check->status*/, |
| 1164 | trash.area); |
Willy Tarreau | 81f5d94 | 2013-12-09 20:51:51 +0100 | [diff] [blame] | 1165 | } |
| 1166 | else |
| 1167 | set_server_check_status(check, status, NULL); |
Simon Horman | a2b9dad | 2013-02-12 10:45:54 +0900 | [diff] [blame] | 1168 | break; |
| 1169 | } |
| 1170 | |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1171 | case PR_O2_PGSQL_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1172 | if (!done && b_data(&check->bi) < 9) |
Rauf Kuliyev | 38b4156 | 2011-01-04 15:14:13 +0100 | [diff] [blame] | 1173 | goto wait_more_data; |
| 1174 | |
Willy Tarreau | 5488a62 | 2019-08-06 16:26:31 +0200 | [diff] [blame] | 1175 | /* do not reset when closing, servers don't like this */ |
| 1176 | if (conn_ctrl_ready(cs->conn)) |
| 1177 | fdtab[cs->conn->handle.fd].linger_risk = 0; |
| 1178 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1179 | if (b_head(&check->bi)[0] == 'R') { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1180 | set_server_check_status(check, HCHK_STATUS_L7OKD, "PostgreSQL server is ok"); |
Rauf Kuliyev | 38b4156 | 2011-01-04 15:14:13 +0100 | [diff] [blame] | 1181 | } |
| 1182 | else { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1183 | if ((b_head(&check->bi)[0] == 'E') && (b_head(&check->bi)[5]!=0) && (b_head(&check->bi)[6]!=0)) |
| 1184 | desc = &b_head(&check->bi)[6]; |
Rauf Kuliyev | 38b4156 | 2011-01-04 15:14:13 +0100 | [diff] [blame] | 1185 | else |
| 1186 | desc = "PostgreSQL unknown error"; |
| 1187 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1188 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Rauf Kuliyev | 38b4156 | 2011-01-04 15:14:13 +0100 | [diff] [blame] | 1189 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1190 | break; |
| 1191 | |
| 1192 | case PR_O2_REDIS_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1193 | if (!done && b_data(&check->bi) < 7) |
Hervé COMMOWICK | ec032d6 | 2011-08-05 16:23:48 +0200 | [diff] [blame] | 1194 | goto wait_more_data; |
| 1195 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1196 | if (strcmp(b_head(&check->bi), "+PONG\r\n") == 0) { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1197 | set_server_check_status(check, HCHK_STATUS_L7OKD, "Redis server is ok"); |
Hervé COMMOWICK | ec032d6 | 2011-08-05 16:23:48 +0200 | [diff] [blame] | 1198 | } |
| 1199 | else { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1200 | set_server_check_status(check, HCHK_STATUS_L7STS, b_head(&check->bi)); |
Hervé COMMOWICK | ec032d6 | 2011-08-05 16:23:48 +0200 | [diff] [blame] | 1201 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1202 | break; |
| 1203 | |
| 1204 | case PR_O2_MYSQL_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1205 | if (!done && b_data(&check->bi) < 5) |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 1206 | goto wait_more_data; |
| 1207 | |
Willy Tarreau | 5488a62 | 2019-08-06 16:26:31 +0200 | [diff] [blame] | 1208 | /* do not reset when closing, servers don't like this */ |
| 1209 | if (conn_ctrl_ready(cs->conn)) |
| 1210 | fdtab[cs->conn->handle.fd].linger_risk = 0; |
| 1211 | |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1212 | if (s->proxy->check_len == 0) { // old mode |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1213 | if (*(b_head(&check->bi) + 4) != '\xff') { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1214 | /* We set the MySQL Version in description for information purpose |
| 1215 | * FIXME : it can be cool to use MySQL Version for other purpose, |
| 1216 | * like mark as down old MySQL server. |
| 1217 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1218 | if (b_data(&check->bi) > 51) { |
| 1219 | desc = ltrim(b_head(&check->bi) + 5, ' '); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1220 | set_server_check_status(check, HCHK_STATUS_L7OKD, desc); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1221 | } |
| 1222 | else { |
| 1223 | if (!done) |
| 1224 | goto wait_more_data; |
Emeric Brun | 9f0b458 | 2017-10-23 14:39:51 +0200 | [diff] [blame] | 1225 | |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1226 | /* it seems we have a OK packet but without a valid length, |
| 1227 | * it must be a protocol error |
| 1228 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1229 | set_server_check_status(check, HCHK_STATUS_L7RSP, b_head(&check->bi)); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1230 | } |
Hervé COMMOWICK | 698ae00 | 2010-01-12 09:25:13 +0100 | [diff] [blame] | 1231 | } |
| 1232 | else { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1233 | /* An error message is attached in the Error packet */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1234 | desc = ltrim(b_head(&check->bi) + 7, ' '); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1235 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1236 | } |
| 1237 | } else { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1238 | unsigned int first_packet_len = ((unsigned int) *b_head(&check->bi)) + |
| 1239 | (((unsigned int) *(b_head(&check->bi) + 1)) << 8) + |
| 1240 | (((unsigned int) *(b_head(&check->bi) + 2)) << 16); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1241 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1242 | if (b_data(&check->bi) == first_packet_len + 4) { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1243 | /* MySQL Error packet always begin with field_count = 0xff */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1244 | if (*(b_head(&check->bi) + 4) != '\xff') { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1245 | /* We have only one MySQL packet and it is a Handshake Initialization packet |
| 1246 | * but we need to have a second packet to know if it is alright |
| 1247 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1248 | if (!done && b_data(&check->bi) < first_packet_len + 5) |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1249 | goto wait_more_data; |
| 1250 | } |
| 1251 | else { |
| 1252 | /* We have only one packet and it is an Error packet, |
| 1253 | * an error message is attached, so we can display it |
| 1254 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1255 | desc = &b_head(&check->bi)[7]; |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1256 | //ha_warning("onlyoneERR: %s\n", desc); |
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 | } |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1259 | } else if (b_data(&check->bi) > first_packet_len + 4) { |
| 1260 | unsigned int second_packet_len = ((unsigned int) *(b_head(&check->bi) + first_packet_len + 4)) + |
| 1261 | (((unsigned int) *(b_head(&check->bi) + first_packet_len + 5)) << 8) + |
| 1262 | (((unsigned int) *(b_head(&check->bi) + first_packet_len + 6)) << 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 + second_packet_len + 4 ) { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1265 | /* We have 2 packets and that's good */ |
| 1266 | /* Check if the second packet is a MySQL Error packet or not */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1267 | if (*(b_head(&check->bi) + first_packet_len + 8) != '\xff') { |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1268 | /* No error packet */ |
| 1269 | /* We set the MySQL Version in description for information purpose */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1270 | desc = &b_head(&check->bi)[5]; |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1271 | //ha_warning("2packetOK: %s\n", desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1272 | set_server_check_status(check, HCHK_STATUS_L7OKD, desc); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1273 | } |
| 1274 | else { |
| 1275 | /* An error message is attached in the Error packet |
| 1276 | * so we can display it ! :) |
| 1277 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1278 | desc = &b_head(&check->bi)[first_packet_len+11]; |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1279 | //ha_warning("2packetERR: %s\n", desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1280 | set_server_check_status(check, HCHK_STATUS_L7STS, desc); |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1281 | } |
| 1282 | } |
| 1283 | } |
| 1284 | else { |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 1285 | if (!done) |
| 1286 | goto wait_more_data; |
Emeric Brun | 9f0b458 | 2017-10-23 14:39:51 +0200 | [diff] [blame] | 1287 | |
Hervé COMMOWICK | 8776f1b | 2010-10-18 15:58:36 +0200 | [diff] [blame] | 1288 | /* 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] | 1289 | * it must be a protocol error |
| 1290 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1291 | desc = &b_head(&check->bi)[5]; |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1292 | //ha_warning("protoerr: %s\n", desc); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1293 | set_server_check_status(check, HCHK_STATUS_L7RSP, desc); |
Hervé COMMOWICK | 698ae00 | 2010-01-12 09:25:13 +0100 | [diff] [blame] | 1294 | } |
| 1295 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1296 | break; |
| 1297 | |
| 1298 | case PR_O2_LDAP_CHK: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1299 | if (!done && b_data(&check->bi) < 14) |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1300 | goto wait_more_data; |
| 1301 | |
| 1302 | /* Check if the server speaks LDAP (ASN.1/BER) |
| 1303 | * http://en.wikipedia.org/wiki/Basic_Encoding_Rules |
| 1304 | * http://tools.ietf.org/html/rfc4511 |
| 1305 | */ |
| 1306 | |
| 1307 | /* http://tools.ietf.org/html/rfc4511#section-4.1.1 |
| 1308 | * LDAPMessage: 0x30: SEQUENCE |
| 1309 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1310 | if ((b_data(&check->bi) < 14) || (*(b_head(&check->bi)) != '\x30')) { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1311 | set_server_check_status(check, HCHK_STATUS_L7RSP, "Not LDAPv3 protocol"); |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1312 | } |
| 1313 | else { |
| 1314 | /* size of LDAPMessage */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1315 | 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] | 1316 | |
| 1317 | /* http://tools.ietf.org/html/rfc4511#section-4.2.2 |
| 1318 | * messageID: 0x02 0x01 0x01: INTEGER 1 |
| 1319 | * protocolOp: 0x61: bindResponse |
| 1320 | */ |
| 1321 | if ((msglen > 2) || |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1322 | (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] | 1323 | set_server_check_status(check, HCHK_STATUS_L7RSP, "Not LDAPv3 protocol"); |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1324 | goto out_wakeup; |
| 1325 | } |
| 1326 | |
| 1327 | /* size of bindResponse */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1328 | 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] | 1329 | |
| 1330 | /* http://tools.ietf.org/html/rfc4511#section-4.1.9 |
| 1331 | * ldapResult: 0x0a 0x01: ENUMERATION |
| 1332 | */ |
| 1333 | if ((msglen > 4) || |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1334 | (memcmp(b_head(&check->bi) + 7 + msglen, "\x0a\x01", 2) != 0)) { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1335 | set_server_check_status(check, HCHK_STATUS_L7RSP, "Not LDAPv3 protocol"); |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1336 | goto out_wakeup; |
| 1337 | } |
| 1338 | |
| 1339 | /* http://tools.ietf.org/html/rfc4511#section-4.1.9 |
| 1340 | * resultCode |
| 1341 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1342 | check->code = *(b_head(&check->bi) + msglen + 9); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1343 | if (check->code) { |
| 1344 | 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] | 1345 | } else { |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 1346 | set_server_check_status(check, HCHK_STATUS_L7OKD, "Success"); |
Gabor Lekeny | b4c81e4 | 2010-09-29 18:17:05 +0200 | [diff] [blame] | 1347 | } |
| 1348 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1349 | break; |
| 1350 | |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 1351 | case PR_O2_SPOP_CHK: { |
| 1352 | unsigned int framesz; |
| 1353 | char err[HCHK_DESC_LEN]; |
| 1354 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1355 | if (!done && b_data(&check->bi) < 4) |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 1356 | goto wait_more_data; |
| 1357 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1358 | memcpy(&framesz, b_head(&check->bi), 4); |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 1359 | framesz = ntohl(framesz); |
| 1360 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1361 | if (!done && b_data(&check->bi) < (4+framesz)) |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 1362 | goto wait_more_data; |
| 1363 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1364 | 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] | 1365 | set_server_check_status(check, HCHK_STATUS_L7OKD, "SPOA server is ok"); |
| 1366 | else |
| 1367 | set_server_check_status(check, HCHK_STATUS_L7STS, err); |
| 1368 | break; |
| 1369 | } |
| 1370 | |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1371 | default: |
Willy Tarreau | 4c1a2b3 | 2019-09-05 18:43:22 +0200 | [diff] [blame] | 1372 | /* good connection is enough for pure TCP check */ |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 1373 | if (!(conn->flags & CO_FL_WAIT_XPRT) && !check->type) { |
Christopher Faulet | f61f33a | 2020-03-27 18:55:49 +0100 | [diff] [blame] | 1374 | if (check->use_ssl == 1) |
Willy Tarreau | 4c1a2b3 | 2019-09-05 18:43:22 +0200 | [diff] [blame] | 1375 | set_server_check_status(check, HCHK_STATUS_L6OK, NULL); |
| 1376 | else |
| 1377 | set_server_check_status(check, HCHK_STATUS_L4OK, NULL); |
| 1378 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 1379 | break; |
| 1380 | } /* switch */ |
Willy Tarreau | 8374918 | 2007-04-15 20:56:27 +0200 | [diff] [blame] | 1381 | |
Willy Tarreau | c7dd71a | 2007-11-30 08:33:21 +0100 | [diff] [blame] | 1382 | out_wakeup: |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 1383 | /* collect possible new errors */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1384 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 1385 | chk_report_conn_err(check, 0, 0); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1386 | |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 1387 | /* Reset the check buffer... */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1388 | *b_head(&check->bi) = '\0'; |
| 1389 | b_reset(&check->bi); |
Nick Chalk | 57b1bf7 | 2010-03-16 15:50:46 +0000 | [diff] [blame] | 1390 | |
Steven Davidovitz | 544d481 | 2017-03-08 11:06:20 -0800 | [diff] [blame] | 1391 | /* Close the connection... We still attempt to nicely close if, |
| 1392 | * for instance, SSL needs to send a "close notify." Later, we perform |
| 1393 | * a hard close and reset the connection if some data are pending, |
| 1394 | * otherwise we end up with many TIME_WAITs and eat all the source port |
| 1395 | * range quickly. To avoid sending RSTs all the time, we first try to |
| 1396 | * drain pending data. |
Willy Tarreau | fd29cc5 | 2012-11-23 09:18:20 +0100 | [diff] [blame] | 1397 | */ |
Olivier Houchard | 6c7e96a | 2019-07-02 16:35:18 +0200 | [diff] [blame] | 1398 | /* Call cs_shutr() first, to add the CO_FL_SOCK_RD_SH flag on the |
| 1399 | * connection, to make sure cs_shutw() will not lead to a shutdown() |
| 1400 | * that would provoke TIME_WAITs. |
| 1401 | */ |
| 1402 | cs_shutr(cs, CS_SHR_DRAIN); |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 1403 | cs_shutw(cs, CS_SHW_NORMAL); |
Willy Tarreau | 2b57cb8 | 2013-06-10 19:56:38 +0200 | [diff] [blame] | 1404 | |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 1405 | /* OK, let's not stay here forever */ |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 1406 | if (check->result == CHK_RES_FAILED) |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 1407 | conn->flags |= CO_FL_ERROR; |
| 1408 | |
Willy Tarreau | fdccded | 2008-08-29 18:19:04 +0200 | [diff] [blame] | 1409 | task_wakeup(t, TASK_WOKEN_IO); |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 1410 | out: |
Willy Tarreau | 3267d36 | 2012-08-17 23:53:56 +0200 | [diff] [blame] | 1411 | return; |
Willy Tarreau | 0393818 | 2010-03-17 21:52:07 +0100 | [diff] [blame] | 1412 | |
| 1413 | wait_more_data: |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 1414 | cs->conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list); |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 1415 | goto out; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1416 | } |
| 1417 | |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 1418 | /* |
| 1419 | * This function is used only for server health-checks. It handles connection |
| 1420 | * status updates including errors. If necessary, it wakes the check task up. |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1421 | * It returns 0 on normal cases, <0 if at least one close() has happened on the |
| 1422 | * connection (eg: reconnect). |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 1423 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1424 | static int wake_srv_chk(struct conn_stream *cs) |
Willy Tarreau | 20bea42 | 2012-07-06 12:00:49 +0200 | [diff] [blame] | 1425 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1426 | struct connection *conn = cs->conn; |
| 1427 | struct check *check = cs->data; |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 1428 | struct email_alertq *q = container_of(check, typeof(*q), check); |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1429 | int ret = 0; |
Willy Tarreau | 20bea42 | 2012-07-06 12:00:49 +0200 | [diff] [blame] | 1430 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 1431 | if (check->server) |
| 1432 | HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock); |
| 1433 | else |
| 1434 | HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Emeric Brun | f6ba17d | 2017-11-02 14:35:27 +0100 | [diff] [blame] | 1435 | |
Willy Tarreau | c09572f | 2017-10-04 11:58:22 +0200 | [diff] [blame] | 1436 | /* we may have to make progress on the TCP checks */ |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1437 | if (check->type == PR_O2_TCPCHK_CHK) { |
| 1438 | ret = tcpcheck_main(check); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1439 | cs = check->cs; |
Willy Tarreau | 543abd4 | 2018-09-20 11:25:12 +0200 | [diff] [blame] | 1440 | conn = cs->conn; |
Willy Tarreau | c594039 | 2019-09-05 17:38:40 +0200 | [diff] [blame] | 1441 | } else { |
| 1442 | if (!(check->wait_list.events & SUB_RETRY_SEND)) |
| 1443 | __event_srv_chk_w(cs); |
| 1444 | if (!(check->wait_list.events & SUB_RETRY_RECV)) |
| 1445 | __event_srv_chk_r(cs); |
| 1446 | } |
Willy Tarreau | c09572f | 2017-10-04 11:58:22 +0200 | [diff] [blame] | 1447 | |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1448 | if (unlikely(conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)) { |
Willy Tarreau | 02b0f58 | 2013-12-03 15:42:33 +0100 | [diff] [blame] | 1449 | /* We may get error reports bypassing the I/O handlers, typically |
| 1450 | * the case when sending a pure TCP check which fails, then the I/O |
| 1451 | * handlers above are not called. This is completely handled by the |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 1452 | * main processing task so let's simply wake it up. If we get here, |
| 1453 | * we expect errno to still be valid. |
| 1454 | */ |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 1455 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | 2d351b6 | 2013-12-05 02:36:25 +0100 | [diff] [blame] | 1456 | task_wakeup(check->task, TASK_WOKEN_IO); |
| 1457 | } |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 1458 | else if (!(conn->flags & CO_FL_WAIT_XPRT) && !check->type) { |
Willy Tarreau | 3be293f | 2014-02-05 18:31:24 +0100 | [diff] [blame] | 1459 | /* we may get here if only a connection probe was required : we |
| 1460 | * don't have any data to send nor anything expected in response, |
| 1461 | * so the completion of the connection establishment is enough. |
| 1462 | */ |
| 1463 | task_wakeup(check->task, TASK_WOKEN_IO); |
| 1464 | } |
Willy Tarreau | 2d351b6 | 2013-12-05 02:36:25 +0100 | [diff] [blame] | 1465 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 1466 | if (check->result != CHK_RES_UNKNOWN) { |
Christopher Faulet | 774c486 | 2019-01-21 14:15:50 +0100 | [diff] [blame] | 1467 | /* Check complete or aborted. If connection not yet closed do it |
| 1468 | * now and wake the check task up to be sure the result is |
| 1469 | * handled ASAP. */ |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 1470 | conn_sock_drain(conn); |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 1471 | cs_close(cs); |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1472 | ret = -1; |
Olivier Houchard | f494957 | 2019-07-02 17:42:22 +0200 | [diff] [blame] | 1473 | /* We may have been scheduled to run, and the |
| 1474 | * I/O handler expects to have a cs, so remove |
| 1475 | * the tasklet |
| 1476 | */ |
| 1477 | tasklet_remove_from_tasklet_list(check->wait_list.tasklet); |
Christopher Faulet | 774c486 | 2019-01-21 14:15:50 +0100 | [diff] [blame] | 1478 | task_wakeup(check->task, TASK_WOKEN_IO); |
Willy Tarreau | 2d351b6 | 2013-12-05 02:36:25 +0100 | [diff] [blame] | 1479 | } |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1480 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 1481 | if (check->server) |
| 1482 | HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock); |
| 1483 | else |
| 1484 | HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Emeric Brun | f6ba17d | 2017-11-02 14:35:27 +0100 | [diff] [blame] | 1485 | |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 1486 | /* if a connection got replaced, we must absolutely prevent the connection |
| 1487 | * handler from touching its fd, and perform the FD polling updates ourselves |
| 1488 | */ |
| 1489 | if (ret < 0) |
| 1490 | conn_cond_update_polling(conn); |
| 1491 | |
| 1492 | return ret; |
Willy Tarreau | 20bea42 | 2012-07-06 12:00:49 +0200 | [diff] [blame] | 1493 | } |
| 1494 | |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 1495 | struct data_cb check_conn_cb = { |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 1496 | .wake = wake_srv_chk, |
Willy Tarreau | 8e0bb0a | 2016-11-24 16:58:12 +0100 | [diff] [blame] | 1497 | .name = "CHCK", |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 1498 | }; |
| 1499 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1500 | /* |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1501 | * updates the server's weight during a warmup stage. Once the final weight is |
| 1502 | * reached, the task automatically stops. Note that any server status change |
| 1503 | * must have updated s->last_change accordingly. |
| 1504 | */ |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 1505 | 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] | 1506 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 1507 | struct server *s = context; |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1508 | |
| 1509 | /* by default, plan on stopping the task */ |
| 1510 | t->expire = TICK_ETERNITY; |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 1511 | if ((s->next_admin & SRV_ADMF_MAINT) || |
| 1512 | (s->next_state != SRV_ST_STARTING)) |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1513 | return t; |
| 1514 | |
Willy Tarreau | 4fc49a9 | 2019-05-05 06:54:22 +0200 | [diff] [blame] | 1515 | HA_SPIN_LOCK(SERVER_LOCK, &s->lock); |
| 1516 | |
Willy Tarreau | 892337c | 2014-05-13 23:41:20 +0200 | [diff] [blame] | 1517 | /* recalculate the weights and update the state */ |
Willy Tarreau | 3ff577e | 2018-08-02 11:48:52 +0200 | [diff] [blame] | 1518 | server_recalc_eweight(s, 1); |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1519 | |
| 1520 | /* probably that we can refill this server with a bit more connections */ |
Willy Tarreau | 4aac7db | 2014-05-16 11:48:10 +0200 | [diff] [blame] | 1521 | pendconn_grab_from_px(s); |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1522 | |
Willy Tarreau | 4fc49a9 | 2019-05-05 06:54:22 +0200 | [diff] [blame] | 1523 | HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock); |
| 1524 | |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1525 | /* get back there in 1 second or 1/20th of the slowstart interval, |
| 1526 | * whichever is greater, resulting in small 5% steps. |
| 1527 | */ |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 1528 | if (s->next_state == SRV_ST_STARTING) |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1529 | t->expire = tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20))); |
| 1530 | return t; |
| 1531 | } |
| 1532 | |
Willy Tarreau | 894c642 | 2017-10-04 15:58:52 +0200 | [diff] [blame] | 1533 | /* returns the first NON-COMMENT tcp-check rule from list <list> or NULL if |
| 1534 | * none was found. |
| 1535 | */ |
| 1536 | static struct tcpcheck_rule *get_first_tcpcheck_rule(struct list *list) |
| 1537 | { |
| 1538 | struct tcpcheck_rule *r; |
| 1539 | |
| 1540 | list_for_each_entry(r, list, list) { |
| 1541 | if (r->action != TCPCHK_ACT_COMMENT) |
| 1542 | return r; |
| 1543 | } |
| 1544 | return NULL; |
| 1545 | } |
| 1546 | |
Willy Tarreau | 2e99390 | 2011-10-31 11:53:20 +0100 | [diff] [blame] | 1547 | /* |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1548 | * establish a server health-check that makes use of a connection. |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1549 | * |
| 1550 | * It can return one of : |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1551 | * - SF_ERR_NONE if everything's OK and tcpcheck_main() was not called |
| 1552 | * - SF_ERR_UP if if everything's OK and tcpcheck_main() was called |
| 1553 | * - SF_ERR_SRVTO if there are no more servers |
| 1554 | * - SF_ERR_SRVCL if the connection was refused by the server |
| 1555 | * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn) |
| 1556 | * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...) |
| 1557 | * - SF_ERR_INTERNAL for any other purely internal errors |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 1558 | * - 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] | 1559 | * 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] | 1560 | * Note that we try to prevent the network stack from sending the ACK during the |
| 1561 | * connect() when a pure TCP check is used (without PROXY protocol). |
| 1562 | */ |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1563 | static int connect_conn_chk(struct task *t) |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1564 | { |
| 1565 | struct check *check = t->context; |
| 1566 | struct server *s = check->server; |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1567 | struct conn_stream *cs = check->cs; |
| 1568 | struct connection *conn = cs_conn(cs); |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1569 | struct protocol *proto; |
Willy Tarreau | f411cce | 2017-10-04 16:21:19 +0200 | [diff] [blame] | 1570 | struct tcpcheck_rule *tcp_rule = NULL; |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1571 | int ret; |
Olivier Houchard | fdcb007 | 2019-05-06 18:32:29 +0200 | [diff] [blame] | 1572 | int connflags = 0; |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1573 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 1574 | /* we cannot have a connection here */ |
| 1575 | if (conn) |
| 1576 | return SF_ERR_INTERNAL; |
| 1577 | |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1578 | /* tcpcheck send/expect initialisation */ |
Willy Tarreau | f411cce | 2017-10-04 16:21:19 +0200 | [diff] [blame] | 1579 | if (check->type == PR_O2_TCPCHK_CHK) { |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1580 | check->current_step = NULL; |
Willy Tarreau | f411cce | 2017-10-04 16:21:19 +0200 | [diff] [blame] | 1581 | tcp_rule = get_first_tcpcheck_rule(check->tcpcheck_rules); |
| 1582 | } |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1583 | |
| 1584 | /* prepare the check buffer. |
| 1585 | * This should not be used if check is the secondary agent check |
| 1586 | * of a server as s->proxy->check_req will relate to the |
| 1587 | * configuration of the primary check. Similarly, tcp-check uses |
| 1588 | * its own strings. |
| 1589 | */ |
| 1590 | 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] | 1591 | b_putblk(&check->bo, s->proxy->check_req, s->proxy->check_len); |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1592 | |
| 1593 | /* we want to check if this host replies to HTTP or SSLv3 requests |
| 1594 | * so we'll send the request, and won't wake the checker up now. |
| 1595 | */ |
| 1596 | if ((check->type) == PR_O2_SSL3_CHK) { |
| 1597 | /* SSL requires that we put Unix time in the request */ |
| 1598 | int gmt_time = htonl(date.tv_sec); |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1599 | memcpy(b_head(&check->bo) + 11, &gmt_time, 4); |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1600 | } |
| 1601 | else if ((check->type) == PR_O2_HTTP_CHK) { |
Cyril Bonté | 32602d2 | 2015-01-30 00:07:07 +0100 | [diff] [blame] | 1602 | /* prevent HTTP keep-alive when "http-check expect" is used */ |
| 1603 | if (s->proxy->options2 & PR_O2_EXP_TYPE) |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1604 | b_putist(&check->bo, ist("Connection: close\r\n")); |
Christopher Faulet | 8acb128 | 2020-04-09 08:44:06 +0200 | [diff] [blame] | 1605 | |
| 1606 | /* If there is a body, add its content-length */ |
| 1607 | if (s->proxy->check_body_len) |
| 1608 | chunk_appendf(&check->bo, "Content-Length: %s\r\n", ultoa(s->proxy->check_body_len)); |
| 1609 | |
| 1610 | /* Add configured headers */ |
| 1611 | if (s->proxy->check_hdrs) |
| 1612 | b_putblk(&check->bo, s->proxy->check_hdrs, s->proxy->check_hdrs_len); |
| 1613 | |
| 1614 | /* Add send-state header */ |
| 1615 | if (s->proxy->options2 & PR_O2_CHK_SNDST) |
| 1616 | b_putblk(&check->bo, trash.area, |
| 1617 | httpchk_build_status_header(s, trash.area, trash.size)); |
| 1618 | |
| 1619 | /* end-of-header */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1620 | b_putist(&check->bo, ist("\r\n")); |
Christopher Faulet | 8acb128 | 2020-04-09 08:44:06 +0200 | [diff] [blame] | 1621 | |
| 1622 | /* Add the body */ |
| 1623 | if (s->proxy->check_body) |
| 1624 | b_putblk(&check->bo, s->proxy->check_body, s->proxy->check_body_len); |
| 1625 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1626 | *b_tail(&check->bo) = '\0'; /* to make gdb output easier to read */ |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1627 | } |
| 1628 | } |
| 1629 | |
James Brown | 55f9ff1 | 2015-10-21 18:19:05 -0700 | [diff] [blame] | 1630 | if ((check->type & PR_O2_LB_AGENT_CHK) && check->send_string_len) { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1631 | b_putblk(&check->bo, check->send_string, check->send_string_len); |
James Brown | 55f9ff1 | 2015-10-21 18:19:05 -0700 | [diff] [blame] | 1632 | } |
| 1633 | |
Willy Tarreau | f411cce | 2017-10-04 16:21:19 +0200 | [diff] [blame] | 1634 | /* for tcp-checks, the initial connection setup is handled separately as |
| 1635 | * it may be sent to a specific port and not to the server's. |
| 1636 | */ |
| 1637 | if (tcp_rule && tcp_rule->action == TCPCHK_ACT_CONNECT) { |
| 1638 | tcpcheck_main(check); |
| 1639 | return SF_ERR_UP; |
| 1640 | } |
| 1641 | |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1642 | /* prepare a new connection */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1643 | cs = check->cs = cs_new(NULL); |
| 1644 | if (!check->cs) |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 1645 | return SF_ERR_RESOURCE; |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1646 | conn = cs->conn; |
Olivier Houchard | 26e1a8f | 2018-09-12 15:15:12 +0200 | [diff] [blame] | 1647 | /* Maybe there were an older connection we were waiting on */ |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 1648 | check->wait_list.events = 0; |
Olivier Houchard | ff1e9f3 | 2019-09-20 17:18:35 +0200 | [diff] [blame] | 1649 | tasklet_set_tid(check->wait_list.tasklet, tid); |
| 1650 | |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1651 | |
Willy Tarreau | ca79f59 | 2019-07-17 19:04:47 +0200 | [diff] [blame] | 1652 | if (!sockaddr_alloc(&conn->dst)) |
| 1653 | return SF_ERR_RESOURCE; |
| 1654 | |
Simon Horman | 41f5876 | 2015-01-30 11:22:56 +0900 | [diff] [blame] | 1655 | if (is_addr(&check->addr)) { |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1656 | /* we'll connect to the check addr specified on the server */ |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 1657 | *conn->dst = check->addr; |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1658 | } |
| 1659 | else { |
| 1660 | /* we'll connect to the addr on the server */ |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 1661 | *conn->dst = s->addr; |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1662 | } |
| 1663 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1664 | if (s->check.via_socks4 && (s->flags & SRV_F_SOCKS4_PROXY)) { |
| 1665 | conn->send_proxy_ofs = 1; |
| 1666 | conn->flags |= CO_FL_SOCKS4; |
| 1667 | } |
| 1668 | |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 1669 | proto = protocol_by_family(conn->dst->ss_family); |
Olivier Houchard | 6377a00 | 2017-12-01 22:04:05 +0100 | [diff] [blame] | 1670 | conn->target = &s->obj_type; |
| 1671 | |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 1672 | 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] | 1673 | int i = 0; |
| 1674 | |
| 1675 | i = srv_check_healthcheck_port(check); |
Olivier Houchard | 6377a00 | 2017-12-01 22:04:05 +0100 | [diff] [blame] | 1676 | if (i == 0) |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 1677 | return SF_ERR_CHK_PORT; |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 1678 | |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 1679 | set_host_port(conn->dst, i); |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1680 | } |
| 1681 | |
Thierry FOURNIER | bb2ae64 | 2015-01-14 11:31:49 +0100 | [diff] [blame] | 1682 | /* no client address */ |
Thierry FOURNIER | bb2ae64 | 2015-01-14 11:31:49 +0100 | [diff] [blame] | 1683 | |
Willy Tarreau | be37315 | 2018-09-06 11:45:30 +0200 | [diff] [blame] | 1684 | conn_prepare(conn, proto, check->xprt); |
Olivier Houchard | f67be93 | 2019-01-29 15:47:43 +0100 | [diff] [blame] | 1685 | if (conn_install_mux(conn, &mux_pt_ops, cs, s->proxy, NULL) < 0) |
| 1686 | return SF_ERR_RESOURCE; |
Willy Tarreau | be37315 | 2018-09-06 11:45:30 +0200 | [diff] [blame] | 1687 | cs_attach(cs, check, &check_conn_cb); |
| 1688 | |
Willy Tarreau | f3d3482 | 2014-12-08 12:11:28 +0100 | [diff] [blame] | 1689 | /* only plain tcp-check supports quick ACK */ |
Olivier Houchard | fdcb007 | 2019-05-06 18:32:29 +0200 | [diff] [blame] | 1690 | if (check->type != 0) |
| 1691 | connflags |= CONNECT_HAS_DATA; |
| 1692 | if ((check->type == 0 || check->type == PR_O2_TCPCHK_CHK) && |
| 1693 | (!tcp_rule || tcp_rule->action != TCPCHK_ACT_EXPECT)) |
| 1694 | connflags |= CONNECT_DELACK_ALWAYS; |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1695 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1696 | ret = SF_ERR_INTERNAL; |
Olivier Houchard | b68fda4 | 2017-08-04 18:39:01 +0200 | [diff] [blame] | 1697 | if (proto && proto->connect) |
Olivier Houchard | fdcb007 | 2019-05-06 18:32:29 +0200 | [diff] [blame] | 1698 | ret = proto->connect(conn, connflags); |
Willy Tarreau | 16257f6 | 2017-11-02 15:45:00 +0100 | [diff] [blame] | 1699 | |
Willy Tarreau | 16257f6 | 2017-11-02 15:45:00 +0100 | [diff] [blame] | 1700 | |
Olivier Houchard | 9130a96 | 2017-10-17 17:33:43 +0200 | [diff] [blame] | 1701 | #ifdef USE_OPENSSL |
Olivier Houchard | a48437b | 2019-01-29 16:37:52 +0100 | [diff] [blame] | 1702 | if (ret == SF_ERR_NONE) { |
| 1703 | if (s->check.sni) |
| 1704 | ssl_sock_set_servername(conn, s->check.sni); |
| 1705 | if (s->check.alpn_str) |
| 1706 | ssl_sock_set_alpn(conn, (unsigned char *)s->check.alpn_str, |
| 1707 | s->check.alpn_len); |
| 1708 | } |
Olivier Houchard | 9130a96 | 2017-10-17 17:33:43 +0200 | [diff] [blame] | 1709 | #endif |
Willy Tarreau | f494977 | 2017-05-06 08:45:28 +0200 | [diff] [blame] | 1710 | if (s->check.send_proxy && !(check->state & CHK_ST_AGENT)) { |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1711 | conn->send_proxy_ofs = 1; |
| 1712 | conn->flags |= CO_FL_SEND_PROXY; |
Olivier Houchard | 37d7897 | 2019-12-30 15:13:42 +0100 | [diff] [blame] | 1713 | } |
| 1714 | if (conn->flags & (CO_FL_SEND_PROXY | CO_FL_SOCKS4) && |
| 1715 | conn_ctrl_ready(conn)) { |
Olivier Houchard | fe50bfb | 2019-05-27 12:09:19 +0200 | [diff] [blame] | 1716 | if (xprt_add_hs(conn) < 0) |
| 1717 | ret = SF_ERR_RESOURCE; |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 1718 | } |
| 1719 | |
| 1720 | return ret; |
| 1721 | } |
| 1722 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1723 | static struct list pid_list = LIST_HEAD_INIT(pid_list); |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1724 | static struct pool_head *pool_head_pid_list; |
Willy Tarreau | 86abe44 | 2018-11-25 20:12:18 +0100 | [diff] [blame] | 1725 | __decl_spinlock(pid_list_lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1726 | |
| 1727 | void block_sigchld(void) |
| 1728 | { |
| 1729 | sigset_t set; |
| 1730 | sigemptyset(&set); |
| 1731 | sigaddset(&set, SIGCHLD); |
William Lallemand | 6e1796e | 2018-06-07 11:23:40 +0200 | [diff] [blame] | 1732 | assert(ha_sigmask(SIG_BLOCK, &set, NULL) == 0); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1733 | } |
| 1734 | |
| 1735 | void unblock_sigchld(void) |
| 1736 | { |
| 1737 | sigset_t set; |
| 1738 | sigemptyset(&set); |
Willy Tarreau | ebc9244 | 2016-06-21 17:29:46 +0200 | [diff] [blame] | 1739 | sigaddset(&set, SIGCHLD); |
William Lallemand | 6e1796e | 2018-06-07 11:23:40 +0200 | [diff] [blame] | 1740 | assert(ha_sigmask(SIG_UNBLOCK, &set, NULL) == 0); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1741 | } |
| 1742 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1743 | static struct pid_list *pid_list_add(pid_t pid, struct task *t) |
| 1744 | { |
| 1745 | struct pid_list *elem; |
| 1746 | struct check *check = t->context; |
| 1747 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1748 | elem = pool_alloc(pool_head_pid_list); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1749 | if (!elem) |
| 1750 | return NULL; |
| 1751 | elem->pid = pid; |
| 1752 | elem->t = t; |
| 1753 | elem->exited = 0; |
| 1754 | check->curpid = elem; |
| 1755 | LIST_INIT(&elem->list); |
Christopher Faulet | cfda847 | 2017-10-20 15:40:23 +0200 | [diff] [blame] | 1756 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1757 | HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1758 | LIST_ADD(&pid_list, &elem->list); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1759 | HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock); |
Christopher Faulet | cfda847 | 2017-10-20 15:40:23 +0200 | [diff] [blame] | 1760 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1761 | return elem; |
| 1762 | } |
| 1763 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1764 | static void pid_list_del(struct pid_list *elem) |
| 1765 | { |
| 1766 | struct check *check; |
| 1767 | |
| 1768 | if (!elem) |
| 1769 | return; |
| 1770 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1771 | HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1772 | LIST_DEL(&elem->list); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1773 | HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock); |
Christopher Faulet | cfda847 | 2017-10-20 15:40:23 +0200 | [diff] [blame] | 1774 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1775 | if (!elem->exited) |
| 1776 | kill(elem->pid, SIGTERM); |
| 1777 | |
| 1778 | check = elem->t->context; |
| 1779 | check->curpid = NULL; |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1780 | pool_free(pool_head_pid_list, elem); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1781 | } |
| 1782 | |
| 1783 | /* Called from inside SIGCHLD handler, SIGCHLD is blocked */ |
| 1784 | static void pid_list_expire(pid_t pid, int status) |
| 1785 | { |
| 1786 | struct pid_list *elem; |
| 1787 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1788 | HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1789 | list_for_each_entry(elem, &pid_list, list) { |
| 1790 | if (elem->pid == pid) { |
| 1791 | elem->t->expire = now_ms; |
| 1792 | elem->status = status; |
| 1793 | elem->exited = 1; |
Cyril Bonté | 9dbcfab | 2014-08-07 01:55:39 +0200 | [diff] [blame] | 1794 | task_wakeup(elem->t, TASK_WOKEN_IO); |
Christopher Faulet | cfda847 | 2017-10-20 15:40:23 +0200 | [diff] [blame] | 1795 | break; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1796 | } |
| 1797 | } |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 1798 | HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1799 | } |
| 1800 | |
Willy Tarreau | 48d6bf2 | 2016-06-21 16:27:34 +0200 | [diff] [blame] | 1801 | static void sigchld_handler(struct sig_handler *sh) |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1802 | { |
| 1803 | pid_t pid; |
| 1804 | int status; |
Willy Tarreau | 48d6bf2 | 2016-06-21 16:27:34 +0200 | [diff] [blame] | 1805 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1806 | while ((pid = waitpid(0, &status, WNOHANG)) > 0) |
| 1807 | pid_list_expire(pid, status); |
| 1808 | } |
| 1809 | |
Willy Tarreau | 48d6bf2 | 2016-06-21 16:27:34 +0200 | [diff] [blame] | 1810 | static int init_pid_list(void) |
| 1811 | { |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1812 | if (pool_head_pid_list != NULL) |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1813 | /* Nothing to do */ |
| 1814 | return 0; |
| 1815 | |
Willy Tarreau | 48d6bf2 | 2016-06-21 16:27:34 +0200 | [diff] [blame] | 1816 | if (!signal_register_fct(SIGCHLD, sigchld_handler, SIGCHLD)) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1817 | ha_alert("Failed to set signal handler for external health checks: %s. Aborting.\n", |
| 1818 | strerror(errno)); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1819 | return 1; |
| 1820 | } |
| 1821 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1822 | pool_head_pid_list = create_pool("pid_list", sizeof(struct pid_list), MEM_F_SHARED); |
| 1823 | if (pool_head_pid_list == NULL) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1824 | ha_alert("Failed to allocate memory pool for external health checks: %s. Aborting.\n", |
| 1825 | strerror(errno)); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1826 | return 1; |
| 1827 | } |
| 1828 | |
| 1829 | return 0; |
| 1830 | } |
| 1831 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1832 | /* helper macro to set an environment variable and jump to a specific label on failure. */ |
| 1833 | #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] | 1834 | |
| 1835 | /* |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1836 | * helper function to allocate enough memory to store an environment variable. |
| 1837 | * It will also check that the environment variable is updatable, and silently |
| 1838 | * fail if not. |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1839 | */ |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1840 | static int extchk_setenv(struct check *check, int idx, const char *value) |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1841 | { |
| 1842 | int len, ret; |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1843 | char *envname; |
| 1844 | int vmaxlen; |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1845 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1846 | if (idx < 0 || idx >= EXTCHK_SIZE) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1847 | ha_alert("Illegal environment variable index %d. Aborting.\n", idx); |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1848 | return 1; |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1849 | } |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1850 | |
| 1851 | envname = extcheck_envs[idx].name; |
| 1852 | vmaxlen = extcheck_envs[idx].vmaxlen; |
| 1853 | |
| 1854 | /* Check if the environment variable is already set, and silently reject |
| 1855 | * the update if this one is not updatable. */ |
| 1856 | if ((vmaxlen == EXTCHK_SIZE_EVAL_INIT) && (check->envp[idx])) |
| 1857 | return 0; |
| 1858 | |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1859 | /* Instead of sending NOT_USED, sending an empty value is preferable */ |
| 1860 | if (strcmp(value, "NOT_USED") == 0) { |
| 1861 | value = ""; |
| 1862 | } |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1863 | |
| 1864 | len = strlen(envname) + 1; |
| 1865 | if (vmaxlen == EXTCHK_SIZE_EVAL_INIT) |
| 1866 | len += strlen(value); |
| 1867 | else |
| 1868 | len += vmaxlen; |
| 1869 | |
| 1870 | if (!check->envp[idx]) |
| 1871 | check->envp[idx] = malloc(len + 1); |
| 1872 | |
| 1873 | if (!check->envp[idx]) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1874 | 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] | 1875 | return 1; |
| 1876 | } |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1877 | ret = snprintf(check->envp[idx], len + 1, "%s=%s", envname, value); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1878 | if (ret < 0) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1879 | 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] | 1880 | return 1; |
| 1881 | } |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1882 | else if (ret > len) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1883 | ha_alert("Environment variable '%s' was truncated. Aborting.\n", envname); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1884 | return 1; |
| 1885 | } |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1886 | return 0; |
| 1887 | } |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1888 | |
| 1889 | static int prepare_external_check(struct check *check) |
| 1890 | { |
| 1891 | struct server *s = check->server; |
| 1892 | struct proxy *px = s->proxy; |
| 1893 | struct listener *listener = NULL, *l; |
| 1894 | int i; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1895 | const char *path = px->check_path ? px->check_path : DEF_CHECK_PATH; |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1896 | char buf[256]; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1897 | |
| 1898 | list_for_each_entry(l, &px->conf.listeners, by_fe) |
| 1899 | /* Use the first INET, INET6 or UNIX listener */ |
| 1900 | if (l->addr.ss_family == AF_INET || |
| 1901 | l->addr.ss_family == AF_INET6 || |
| 1902 | l->addr.ss_family == AF_UNIX) { |
| 1903 | listener = l; |
| 1904 | break; |
| 1905 | } |
| 1906 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1907 | check->curpid = NULL; |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1908 | check->envp = calloc((EXTCHK_SIZE + 1), sizeof(char *)); |
| 1909 | if (!check->envp) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1910 | ha_alert("Failed to allocate memory for environment variables. Aborting\n"); |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1911 | goto err; |
| 1912 | } |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1913 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1914 | check->argv = calloc(6, sizeof(char *)); |
| 1915 | if (!check->argv) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1916 | 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] | 1917 | goto err; |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1918 | } |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1919 | |
| 1920 | check->argv[0] = px->check_command; |
| 1921 | |
Cyril Bonté | 777be86 | 2014-12-02 21:21:35 +0100 | [diff] [blame] | 1922 | if (!listener) { |
| 1923 | check->argv[1] = strdup("NOT_USED"); |
| 1924 | check->argv[2] = strdup("NOT_USED"); |
| 1925 | } |
| 1926 | else if (listener->addr.ss_family == AF_INET || |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1927 | listener->addr.ss_family == AF_INET6) { |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1928 | addr_to_str(&listener->addr, buf, sizeof(buf)); |
| 1929 | check->argv[1] = strdup(buf); |
| 1930 | port_to_str(&listener->addr, buf, sizeof(buf)); |
| 1931 | check->argv[2] = strdup(buf); |
Cyril Bonté | 777be86 | 2014-12-02 21:21:35 +0100 | [diff] [blame] | 1932 | } |
| 1933 | else if (listener->addr.ss_family == AF_UNIX) { |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1934 | const struct sockaddr_un *un; |
| 1935 | |
| 1936 | un = (struct sockaddr_un *)&listener->addr; |
| 1937 | check->argv[1] = strdup(un->sun_path); |
| 1938 | check->argv[2] = strdup("NOT_USED"); |
Cyril Bonté | 777be86 | 2014-12-02 21:21:35 +0100 | [diff] [blame] | 1939 | } |
| 1940 | else { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1941 | 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] | 1942 | goto err; |
| 1943 | } |
| 1944 | |
Christopher Faulet | aaae9a0 | 2020-04-26 09:50:31 +0200 | [diff] [blame] | 1945 | if (!check->argv[1] || !check->argv[2]) { |
| 1946 | ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id); |
| 1947 | goto err; |
| 1948 | } |
| 1949 | |
| 1950 | check->argv[3] = calloc(EXTCHK_SIZE_ADDR, sizeof(*check->argv[3])); |
| 1951 | check->argv[4] = calloc(EXTCHK_SIZE_UINT, sizeof(*check->argv[4])); |
| 1952 | if (!check->argv[3] || !check->argv[4]) { |
| 1953 | ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id); |
| 1954 | goto err; |
| 1955 | } |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 1956 | |
Christopher Faulet | aaae9a0 | 2020-04-26 09:50:31 +0200 | [diff] [blame] | 1957 | addr_to_str(&s->addr, check->argv[3], EXTCHK_SIZE_ADDR); |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 1958 | 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] | 1959 | snprintf(check->argv[4], EXTCHK_SIZE_UINT, "%u", s->svc_port); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1960 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1961 | for (i = 0; i < 5; i++) { |
| 1962 | if (!check->argv[i]) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 1963 | 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] | 1964 | goto err; |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1965 | } |
| 1966 | } |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1967 | |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1968 | EXTCHK_SETENV(check, EXTCHK_PATH, path, err); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1969 | /* Add proxy environment variables */ |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1970 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_NAME, px->id, err); |
| 1971 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_ID, ultoa_r(px->uuid, buf, sizeof(buf)), err); |
| 1972 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_ADDR, check->argv[1], err); |
| 1973 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_PORT, check->argv[2], err); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1974 | /* Add server environment variables */ |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1975 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_NAME, s->id, err); |
| 1976 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_ID, ultoa_r(s->puid, buf, sizeof(buf)), err); |
| 1977 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_ADDR, check->argv[3], err); |
| 1978 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_PORT, check->argv[4], err); |
| 1979 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_MAXCONN, ultoa_r(s->maxconn, buf, sizeof(buf)), err); |
| 1980 | EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_CURCONN, ultoa_r(s->cur_sess, buf, sizeof(buf)), err); |
| 1981 | |
| 1982 | /* Ensure that we don't leave any hole in check->envp */ |
| 1983 | for (i = 0; i < EXTCHK_SIZE; i++) |
| 1984 | if (!check->envp[i]) |
| 1985 | EXTCHK_SETENV(check, i, "", err); |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1986 | |
Cyril Bonté | 99c5bf5 | 2014-08-07 01:55:38 +0200 | [diff] [blame] | 1987 | return 1; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1988 | err: |
| 1989 | if (check->envp) { |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 1990 | for (i = 0; i < EXTCHK_SIZE; i++) |
Cyril Bonté | 9ede66b | 2014-12-02 21:21:36 +0100 | [diff] [blame] | 1991 | free(check->envp[i]); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 1992 | free(check->envp); |
| 1993 | check->envp = NULL; |
| 1994 | } |
| 1995 | |
| 1996 | if (check->argv) { |
| 1997 | for (i = 1; i < 5; i++) |
| 1998 | free(check->argv[i]); |
| 1999 | free(check->argv); |
| 2000 | check->argv = NULL; |
| 2001 | } |
Cyril Bonté | 99c5bf5 | 2014-08-07 01:55:38 +0200 | [diff] [blame] | 2002 | return 0; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2003 | } |
| 2004 | |
Simon Horman | b00d17a | 2014-06-13 16:18:16 +0900 | [diff] [blame] | 2005 | /* |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2006 | * establish a server health-check that makes use of a process. |
| 2007 | * |
| 2008 | * It can return one of : |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2009 | * - SF_ERR_NONE if everything's OK |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2010 | * - 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] | 2011 | * 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] | 2012 | * |
| 2013 | * Blocks and then unblocks SIGCHLD |
| 2014 | */ |
| 2015 | static int connect_proc_chk(struct task *t) |
| 2016 | { |
Cyril Bonté | ac92a06 | 2014-12-27 22:28:38 +0100 | [diff] [blame] | 2017 | char buf[256]; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2018 | struct check *check = t->context; |
| 2019 | struct server *s = check->server; |
| 2020 | struct proxy *px = s->proxy; |
| 2021 | int status; |
| 2022 | pid_t pid; |
| 2023 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2024 | status = SF_ERR_RESOURCE; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2025 | |
| 2026 | block_sigchld(); |
| 2027 | |
| 2028 | pid = fork(); |
| 2029 | if (pid < 0) { |
Willy Tarreau | d96f112 | 2019-12-03 07:07:36 +0100 | [diff] [blame] | 2030 | ha_alert("Failed to fork process for external health check%s: %s. Aborting.\n", |
| 2031 | (global.tune.options & GTUNE_INSECURE_FORK) ? |
| 2032 | "" : " (likely caused by missing 'insecure-fork-wanted')", |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2033 | strerror(errno)); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2034 | set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno)); |
| 2035 | goto out; |
| 2036 | } |
| 2037 | if (pid == 0) { |
| 2038 | /* Child */ |
| 2039 | extern char **environ; |
Willy Tarreau | 9f6dc72 | 2019-03-01 11:15:10 +0100 | [diff] [blame] | 2040 | struct rlimit limit; |
Willy Tarreau | b7b2478 | 2016-06-21 15:32:29 +0200 | [diff] [blame] | 2041 | int fd; |
| 2042 | |
| 2043 | /* close all FDs. Keep stdin/stdout/stderr in verbose mode */ |
| 2044 | fd = (global.mode & (MODE_QUIET|MODE_VERBOSE)) == MODE_QUIET ? 0 : 3; |
| 2045 | |
Willy Tarreau | 2555ccf | 2019-02-21 22:22:06 +0100 | [diff] [blame] | 2046 | my_closefrom(fd); |
Willy Tarreau | b7b2478 | 2016-06-21 15:32:29 +0200 | [diff] [blame] | 2047 | |
Willy Tarreau | 9f6dc72 | 2019-03-01 11:15:10 +0100 | [diff] [blame] | 2048 | /* restore the initial FD limits */ |
| 2049 | limit.rlim_cur = rlim_fd_cur_at_boot; |
| 2050 | limit.rlim_max = rlim_fd_max_at_boot; |
| 2051 | if (setrlimit(RLIMIT_NOFILE, &limit) == -1) { |
| 2052 | getrlimit(RLIMIT_NOFILE, &limit); |
| 2053 | ha_warning("External check: failed to restore initial FD limits (cur=%u max=%u), using cur=%u max=%u\n", |
| 2054 | rlim_fd_cur_at_boot, rlim_fd_max_at_boot, |
| 2055 | (unsigned int)limit.rlim_cur, (unsigned int)limit.rlim_max); |
| 2056 | } |
| 2057 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2058 | environ = check->envp; |
Christopher Faulet | aaae9a0 | 2020-04-26 09:50:31 +0200 | [diff] [blame] | 2059 | |
| 2060 | /* 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] | 2061 | 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] | 2062 | |
| 2063 | addr_to_str(&s->addr, check->argv[3], EXTCHK_SIZE_ADDR); |
| 2064 | extchk_setenv(check, EXTCHK_HAPROXY_SERVER_ADDR, check->argv[3]); |
| 2065 | |
| 2066 | *check->argv[4] = 0; |
| 2067 | if (s->addr.ss_family == AF_INET || s->addr.ss_family == AF_INET6) |
| 2068 | snprintf(check->argv[4], EXTCHK_SIZE_UINT, "%u", s->svc_port); |
| 2069 | extchk_setenv(check, EXTCHK_HAPROXY_SERVER_PORT, check->argv[4]); |
| 2070 | |
Willy Tarreau | 2df8cad | 2019-07-01 07:51:29 +0200 | [diff] [blame] | 2071 | haproxy_unblock_signals(); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2072 | execvp(px->check_command, check->argv); |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2073 | ha_alert("Failed to exec process for external health check: %s. Aborting.\n", |
| 2074 | strerror(errno)); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2075 | exit(-1); |
| 2076 | } |
| 2077 | |
| 2078 | /* Parent */ |
| 2079 | if (check->result == CHK_RES_UNKNOWN) { |
| 2080 | if (pid_list_add(pid, t) != NULL) { |
| 2081 | t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter)); |
| 2082 | |
| 2083 | if (px->timeout.check && px->timeout.connect) { |
| 2084 | int t_con = tick_add(now_ms, px->timeout.connect); |
| 2085 | t->expire = tick_first(t->expire, t_con); |
| 2086 | } |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2087 | status = SF_ERR_NONE; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2088 | goto out; |
| 2089 | } |
| 2090 | else { |
| 2091 | set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno)); |
| 2092 | } |
| 2093 | kill(pid, SIGTERM); /* process creation error */ |
| 2094 | } |
| 2095 | else |
| 2096 | set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno)); |
| 2097 | |
| 2098 | out: |
| 2099 | unblock_sigchld(); |
| 2100 | return status; |
| 2101 | } |
| 2102 | |
| 2103 | /* |
Willy Tarreau | 1e62e2a | 2017-10-04 15:07:02 +0200 | [diff] [blame] | 2104 | * manages a server health-check that uses an external process. Returns |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2105 | * the time the task accepts to wait, or TIME_ETERNITY for infinity. |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2106 | * |
| 2107 | * Please do NOT place any return statement in this function and only leave |
| 2108 | * via the out_unlock label. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2109 | */ |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2110 | 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] | 2111 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2112 | struct check *check = context; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2113 | struct server *s = check->server; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2114 | int rv; |
| 2115 | int ret; |
| 2116 | int expired = tick_is_expired(t->expire, now_ms); |
| 2117 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 2118 | HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2119 | if (!(check->state & CHK_ST_INPROGRESS)) { |
| 2120 | /* no check currently running */ |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2121 | if (!expired) /* woke up too early */ |
| 2122 | goto out_unlock; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2123 | |
| 2124 | /* we don't send any health-checks when the proxy is |
| 2125 | * stopped, the server should not be checked or the check |
| 2126 | * is disabled. |
| 2127 | */ |
| 2128 | if (((check->state & (CHK_ST_ENABLED | CHK_ST_PAUSED)) != CHK_ST_ENABLED) || |
| 2129 | s->proxy->state == PR_STSTOPPED) |
| 2130 | goto reschedule; |
| 2131 | |
| 2132 | /* we'll initiate a new check */ |
| 2133 | set_server_check_status(check, HCHK_STATUS_START, NULL); |
| 2134 | |
| 2135 | check->state |= CHK_ST_INPROGRESS; |
| 2136 | |
Simon Horman | dbf7019 | 2015-01-30 11:22:53 +0900 | [diff] [blame] | 2137 | ret = connect_proc_chk(t); |
Willy Tarreau | d7c3fbd | 2017-10-04 15:19:26 +0200 | [diff] [blame] | 2138 | if (ret == SF_ERR_NONE) { |
Willy Tarreau | 1e62e2a | 2017-10-04 15:07:02 +0200 | [diff] [blame] | 2139 | /* the process was forked, we allow up to min(inter, |
| 2140 | * timeout.connect) for it to report its status, but |
| 2141 | * only when timeout.check is set as it may be to short |
| 2142 | * for a full check otherwise. |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2143 | */ |
| 2144 | t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter)); |
| 2145 | |
| 2146 | if (s->proxy->timeout.check && s->proxy->timeout.connect) { |
| 2147 | int t_con = tick_add(now_ms, s->proxy->timeout.connect); |
| 2148 | t->expire = tick_first(t->expire, t_con); |
| 2149 | } |
Christopher Faulet | 88ce5d1 | 2017-10-20 15:41:18 +0200 | [diff] [blame] | 2150 | task_set_affinity(t, tid_bit); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2151 | goto reschedule; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2152 | } |
| 2153 | |
Willy Tarreau | 1e62e2a | 2017-10-04 15:07:02 +0200 | [diff] [blame] | 2154 | /* here, we failed to start the check */ |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2155 | |
| 2156 | check->state &= ~CHK_ST_INPROGRESS; |
| 2157 | check_notify_failure(check); |
| 2158 | |
| 2159 | /* we allow up to min(inter, timeout.connect) for a connection |
| 2160 | * to establish but only when timeout.check is set |
| 2161 | * as it may be to short for a full check otherwise |
| 2162 | */ |
| 2163 | while (tick_is_expired(t->expire, now_ms)) { |
| 2164 | int t_con; |
| 2165 | |
| 2166 | t_con = tick_add(t->expire, s->proxy->timeout.connect); |
| 2167 | t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter)); |
| 2168 | |
| 2169 | if (s->proxy->timeout.check) |
| 2170 | t->expire = tick_first(t->expire, t_con); |
| 2171 | } |
| 2172 | } |
| 2173 | else { |
| 2174 | /* there was a test running. |
| 2175 | * First, let's check whether there was an uncaught error, |
| 2176 | * which can happen on connect timeout or error. |
| 2177 | */ |
| 2178 | if (check->result == CHK_RES_UNKNOWN) { |
| 2179 | /* good connection is enough for pure TCP check */ |
| 2180 | struct pid_list *elem = check->curpid; |
| 2181 | int status = HCHK_STATUS_UNKNOWN; |
| 2182 | |
| 2183 | if (elem->exited) { |
| 2184 | status = elem->status; /* Save in case the process exits between use below */ |
| 2185 | if (!WIFEXITED(status)) |
| 2186 | check->code = -1; |
| 2187 | else |
| 2188 | check->code = WEXITSTATUS(status); |
| 2189 | if (!WIFEXITED(status) || WEXITSTATUS(status)) |
| 2190 | status = HCHK_STATUS_PROCERR; |
| 2191 | else |
| 2192 | status = HCHK_STATUS_PROCOK; |
| 2193 | } else if (expired) { |
| 2194 | status = HCHK_STATUS_PROCTOUT; |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2195 | ha_warning("kill %d\n", (int)elem->pid); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2196 | kill(elem->pid, SIGTERM); |
| 2197 | } |
| 2198 | set_server_check_status(check, status, NULL); |
| 2199 | } |
| 2200 | |
| 2201 | if (check->result == CHK_RES_FAILED) { |
| 2202 | /* a failure or timeout detected */ |
| 2203 | check_notify_failure(check); |
| 2204 | } |
| 2205 | else if (check->result == CHK_RES_CONDPASS) { |
| 2206 | /* check is OK but asks for stopping mode */ |
| 2207 | check_notify_stopping(check); |
| 2208 | } |
| 2209 | else if (check->result == CHK_RES_PASSED) { |
| 2210 | /* a success was detected */ |
| 2211 | check_notify_success(check); |
| 2212 | } |
Willy Tarreau | 6dd4ac8 | 2019-09-03 18:55:02 +0200 | [diff] [blame] | 2213 | task_set_affinity(t, 1); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2214 | check->state &= ~CHK_ST_INPROGRESS; |
| 2215 | |
| 2216 | pid_list_del(check->curpid); |
| 2217 | |
| 2218 | rv = 0; |
| 2219 | if (global.spread_checks > 0) { |
| 2220 | rv = srv_getinter(check) * global.spread_checks / 100; |
Willy Tarreau | 5a6d3e7 | 2020-03-08 17:53:53 +0100 | [diff] [blame] | 2221 | rv -= (int) (2 * rv * (ha_random32() / 4294967295.0)); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2222 | } |
| 2223 | t->expire = tick_add(now_ms, MS_TO_TICKS(srv_getinter(check) + rv)); |
| 2224 | } |
| 2225 | |
| 2226 | reschedule: |
| 2227 | while (tick_is_expired(t->expire, now_ms)) |
| 2228 | t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter)); |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2229 | |
| 2230 | out_unlock: |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 2231 | HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock); |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2232 | return t; |
| 2233 | } |
| 2234 | |
| 2235 | /* |
| 2236 | * manages a server health-check that uses a connection. Returns |
| 2237 | * the time the task accepts to wait, or TIME_ETERNITY for infinity. |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2238 | * |
| 2239 | * Please do NOT place any return statement in this function and only leave |
| 2240 | * via the out_unlock label. |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2241 | */ |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2242 | 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] | 2243 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2244 | struct check *check = context; |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2245 | struct proxy *proxy = check->proxy; |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2246 | struct conn_stream *cs = check->cs; |
| 2247 | struct connection *conn = cs_conn(cs); |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2248 | int rv; |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 2249 | int ret; |
Willy Tarreau | acbdc7a | 2012-11-23 14:02:10 +0100 | [diff] [blame] | 2250 | int expired = tick_is_expired(t->expire, now_ms); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2251 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2252 | if (check->server) |
| 2253 | HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock); |
Willy Tarreau | 2c115e5 | 2013-12-11 19:41:16 +0100 | [diff] [blame] | 2254 | if (!(check->state & CHK_ST_INPROGRESS)) { |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2255 | /* no check currently running */ |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2256 | if (!expired) /* woke up too early */ |
| 2257 | goto out_unlock; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2258 | |
Simon Horman | 671b6f0 | 2013-11-25 10:46:39 +0900 | [diff] [blame] | 2259 | /* we don't send any health-checks when the proxy is |
| 2260 | * stopped, the server should not be checked or the check |
| 2261 | * is disabled. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2262 | */ |
Willy Tarreau | 0d924cc | 2013-12-11 21:26:24 +0100 | [diff] [blame] | 2263 | if (((check->state & (CHK_ST_ENABLED | CHK_ST_PAUSED)) != CHK_ST_ENABLED) || |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2264 | proxy->state == PR_STSTOPPED) |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2265 | goto reschedule; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2266 | |
| 2267 | /* we'll initiate a new check */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2268 | set_server_check_status(check, HCHK_STATUS_START, NULL); |
Willy Tarreau | 1ae1b7b | 2012-09-28 15:28:30 +0200 | [diff] [blame] | 2269 | |
Willy Tarreau | 2c115e5 | 2013-12-11 19:41:16 +0100 | [diff] [blame] | 2270 | check->state |= CHK_ST_INPROGRESS; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2271 | b_reset(&check->bi); |
| 2272 | b_reset(&check->bo); |
Willy Tarreau | 1ae1b7b | 2012-09-28 15:28:30 +0200 | [diff] [blame] | 2273 | |
Olivier Houchard | aebeff7 | 2019-11-29 16:18:51 +0100 | [diff] [blame] | 2274 | task_set_affinity(t, tid_bit); |
Simon Horman | dbf7019 | 2015-01-30 11:22:53 +0900 | [diff] [blame] | 2275 | ret = connect_conn_chk(t); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2276 | cs = check->cs; |
| 2277 | conn = cs_conn(cs); |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2278 | |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 2279 | switch (ret) { |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2280 | case SF_ERR_UP: |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2281 | goto out_unlock; |
| 2282 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2283 | case SF_ERR_NONE: |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 2284 | /* we allow up to min(inter, timeout.connect) for a connection |
| 2285 | * to establish but only when timeout.check is set |
| 2286 | * as it may be to short for a full check otherwise |
| 2287 | */ |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2288 | t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter)); |
Krzysztof Piotr Oledzki | 0960541 | 2009-09-23 22:09:24 +0200 | [diff] [blame] | 2289 | |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2290 | if (proxy->timeout.check && proxy->timeout.connect) { |
| 2291 | int t_con = tick_add(now_ms, proxy->timeout.connect); |
Willy Tarreau | fb56aab | 2012-09-28 14:40:02 +0200 | [diff] [blame] | 2292 | t->expire = tick_first(t->expire, t_con); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2293 | } |
Willy Tarreau | 06559ac | 2013-12-05 01:53:08 +0100 | [diff] [blame] | 2294 | |
Willy Tarreau | cc705a6 | 2019-09-05 17:51:30 +0200 | [diff] [blame] | 2295 | if (check->type) { |
| 2296 | /* send the request if we have one. We avoid receiving |
| 2297 | * if not connected, unless we didn't subscribe for |
| 2298 | * sending since otherwise we won't be woken up. |
| 2299 | */ |
| 2300 | __event_srv_chk_w(cs); |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 2301 | if (!(conn->flags & CO_FL_WAIT_XPRT) || |
Willy Tarreau | c594039 | 2019-09-05 17:38:40 +0200 | [diff] [blame] | 2302 | !(check->wait_list.events & SUB_RETRY_SEND)) |
| 2303 | __event_srv_chk_r(cs); |
Willy Tarreau | cc705a6 | 2019-09-05 17:51:30 +0200 | [diff] [blame] | 2304 | } |
Willy Tarreau | 06559ac | 2013-12-05 01:53:08 +0100 | [diff] [blame] | 2305 | |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2306 | goto reschedule; |
| 2307 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2308 | case SF_ERR_SRVTO: /* ETIMEDOUT */ |
| 2309 | case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */ |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2310 | if (conn) |
| 2311 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 2312 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2313 | break; |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 2314 | /* should share same code than cases below */ |
| 2315 | case SF_ERR_CHK_PORT: |
| 2316 | check->state |= CHK_ST_PORT_MISS; |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2317 | case SF_ERR_PRXCOND: |
| 2318 | case SF_ERR_RESOURCE: |
| 2319 | case SF_ERR_INTERNAL: |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2320 | if (conn) |
| 2321 | conn->flags |= CO_FL_ERROR; |
| 2322 | chk_report_conn_err(check, conn ? 0 : ENOMEM, 0); |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2323 | break; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2324 | } |
| 2325 | |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2326 | /* here, we have seen a synchronous error, no fd was allocated */ |
Olivier Houchard | aebeff7 | 2019-11-29 16:18:51 +0100 | [diff] [blame] | 2327 | task_set_affinity(t, MAX_THREADS_MASK); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2328 | if (cs) { |
Olivier Houchard | 4906554 | 2019-05-31 19:20:36 +0200 | [diff] [blame] | 2329 | if (check->wait_list.events) |
| 2330 | cs->conn->xprt->unsubscribe(cs->conn, |
| 2331 | cs->conn->xprt_ctx, |
| 2332 | check->wait_list.events, |
| 2333 | &check->wait_list); |
| 2334 | /* We may have been scheduled to run, and the |
| 2335 | * I/O handler expects to have a cs, so remove |
| 2336 | * the tasklet |
| 2337 | */ |
Willy Tarreau | 86eded6 | 2019-06-14 14:47:49 +0200 | [diff] [blame] | 2338 | tasklet_remove_from_tasklet_list(check->wait_list.tasklet); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2339 | cs_destroy(cs); |
| 2340 | cs = check->cs = NULL; |
| 2341 | conn = NULL; |
Olivier Houchard | 390485a | 2017-10-24 19:03:30 +0200 | [diff] [blame] | 2342 | } |
Willy Tarreau | 6b0a850 | 2012-11-23 08:51:32 +0100 | [diff] [blame] | 2343 | |
Willy Tarreau | 2c115e5 | 2013-12-11 19:41:16 +0100 | [diff] [blame] | 2344 | check->state &= ~CHK_ST_INPROGRESS; |
Willy Tarreau | 4eec547 | 2014-05-20 22:32:27 +0200 | [diff] [blame] | 2345 | check_notify_failure(check); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2346 | |
Krzysztof Piotr Oledzki | 5259dfe | 2008-01-21 01:54:06 +0100 | [diff] [blame] | 2347 | /* we allow up to min(inter, timeout.connect) for a connection |
| 2348 | * to establish but only when timeout.check is set |
| 2349 | * as it may be to short for a full check otherwise |
| 2350 | */ |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 2351 | while (tick_is_expired(t->expire, now_ms)) { |
| 2352 | int t_con; |
Krzysztof Piotr Oledzki | 5259dfe | 2008-01-21 01:54:06 +0100 | [diff] [blame] | 2353 | |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2354 | t_con = tick_add(t->expire, proxy->timeout.connect); |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2355 | t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter)); |
Krzysztof Piotr Oledzki | 5259dfe | 2008-01-21 01:54:06 +0100 | [diff] [blame] | 2356 | |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2357 | if (proxy->timeout.check) |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 2358 | t->expire = tick_first(t->expire, t_con); |
Krzysztof Piotr Oledzki | 5259dfe | 2008-01-21 01:54:06 +0100 | [diff] [blame] | 2359 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2360 | } |
| 2361 | else { |
Willy Tarreau | f150317 | 2012-09-28 19:39:36 +0200 | [diff] [blame] | 2362 | /* there was a test running. |
| 2363 | * First, let's check whether there was an uncaught error, |
| 2364 | * which can happen on connect timeout or error. |
| 2365 | */ |
Simon Horman | ccaabcd | 2014-06-20 12:29:47 +0900 | [diff] [blame] | 2366 | if (check->result == CHK_RES_UNKNOWN) { |
Willy Tarreau | 25e2ab5 | 2013-12-04 11:17:05 +0100 | [diff] [blame] | 2367 | /* good connection is enough for pure TCP check */ |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 2368 | if (!(conn->flags & CO_FL_WAIT_XPRT) && !check->type) { |
Christopher Faulet | f61f33a | 2020-03-27 18:55:49 +0100 | [diff] [blame] | 2369 | if (check->use_ssl == 1) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2370 | set_server_check_status(check, HCHK_STATUS_L6OK, NULL); |
Willy Tarreau | f150317 | 2012-09-28 19:39:36 +0200 | [diff] [blame] | 2371 | else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2372 | set_server_check_status(check, HCHK_STATUS_L4OK, NULL); |
Willy Tarreau | acbdc7a | 2012-11-23 14:02:10 +0100 | [diff] [blame] | 2373 | } |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 2374 | 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] | 2375 | chk_report_conn_err(check, 0, expired); |
Willy Tarreau | f150317 | 2012-09-28 19:39:36 +0200 | [diff] [blame] | 2376 | } |
Willy Tarreau | 74fa7fb | 2012-11-23 14:43:49 +0100 | [diff] [blame] | 2377 | else |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2378 | goto out_unlock; /* timeout not reached, wait again */ |
Willy Tarreau | f150317 | 2012-09-28 19:39:36 +0200 | [diff] [blame] | 2379 | } |
| 2380 | |
Willy Tarreau | 74fa7fb | 2012-11-23 14:43:49 +0100 | [diff] [blame] | 2381 | /* check complete or aborted */ |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2382 | if (conn && conn->xprt) { |
Willy Tarreau | 5ba04f6 | 2013-02-12 15:23:12 +0100 | [diff] [blame] | 2383 | /* The check was aborted and the connection was not yet closed. |
| 2384 | * This can happen upon timeout, or when an external event such |
| 2385 | * as a failed response coupled with "observe layer7" caused the |
| 2386 | * server state to be suddenly changed. |
| 2387 | */ |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 2388 | conn_sock_drain(conn); |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 2389 | cs_close(cs); |
Willy Tarreau | 5ba04f6 | 2013-02-12 15:23:12 +0100 | [diff] [blame] | 2390 | } |
| 2391 | |
Willy Tarreau | ac59f36 | 2017-10-08 11:10:19 +0200 | [diff] [blame] | 2392 | if (cs) { |
Olivier Houchard | 4906554 | 2019-05-31 19:20:36 +0200 | [diff] [blame] | 2393 | if (check->wait_list.events) |
| 2394 | cs->conn->xprt->unsubscribe(cs->conn, |
| 2395 | cs->conn->xprt_ctx, |
| 2396 | check->wait_list.events, |
| 2397 | &check->wait_list); |
| 2398 | /* We may have been scheduled to run, and the |
Willy Tarreau | 86eded6 | 2019-06-14 14:47:49 +0200 | [diff] [blame] | 2399 | * I/O handler expects to have a cs, so remove |
| 2400 | * the tasklet |
| 2401 | */ |
| 2402 | tasklet_remove_from_tasklet_list(check->wait_list.tasklet); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2403 | cs_destroy(cs); |
| 2404 | cs = check->cs = NULL; |
| 2405 | conn = NULL; |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2406 | } |
| 2407 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2408 | if (check->server) { |
| 2409 | if (check->result == CHK_RES_FAILED) { |
| 2410 | /* a failure or timeout detected */ |
| 2411 | check_notify_failure(check); |
| 2412 | } |
| 2413 | else if (check->result == CHK_RES_CONDPASS) { |
| 2414 | /* check is OK but asks for stopping mode */ |
| 2415 | check_notify_stopping(check); |
| 2416 | } |
| 2417 | else if (check->result == CHK_RES_PASSED) { |
| 2418 | /* a success was detected */ |
| 2419 | check_notify_success(check); |
| 2420 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2421 | } |
Christopher Faulet | 88ce5d1 | 2017-10-20 15:41:18 +0200 | [diff] [blame] | 2422 | task_set_affinity(t, MAX_THREADS_MASK); |
Willy Tarreau | 2c115e5 | 2013-12-11 19:41:16 +0100 | [diff] [blame] | 2423 | check->state &= ~CHK_ST_INPROGRESS; |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2424 | |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2425 | if (check->server) { |
| 2426 | rv = 0; |
| 2427 | if (global.spread_checks > 0) { |
| 2428 | rv = srv_getinter(check) * global.spread_checks / 100; |
Willy Tarreau | 5a6d3e7 | 2020-03-08 17:53:53 +0100 | [diff] [blame] | 2429 | rv -= (int) (2 * rv * (ha_random32() / 4294967295.0)); |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2430 | } |
| 2431 | 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] | 2432 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2433 | } |
Willy Tarreau | 5a78f36 | 2012-11-23 12:47:05 +0100 | [diff] [blame] | 2434 | |
| 2435 | reschedule: |
| 2436 | while (tick_is_expired(t->expire, now_ms)) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2437 | t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter)); |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2438 | out_unlock: |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2439 | if (check->server) |
| 2440 | HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock); |
Willy Tarreau | 26c2506 | 2009-03-08 09:38:41 +0100 | [diff] [blame] | 2441 | return t; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2442 | } |
| 2443 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2444 | /* |
| 2445 | * manages a server health-check. Returns |
| 2446 | * the time the task accepts to wait, or TIME_ETERNITY for infinity. |
| 2447 | */ |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2448 | 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] | 2449 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2450 | struct check *check = context; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2451 | |
| 2452 | if (check->type == PR_O2_EXT_CHK) |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 2453 | return process_chk_proc(t, context, state); |
| 2454 | return process_chk_conn(t, context, state); |
Baptiste Assmann | a68ca96 | 2015-04-14 01:15:08 +0200 | [diff] [blame] | 2455 | |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2456 | } |
| 2457 | |
Simon Horman | 5c94242 | 2013-11-25 10:46:32 +0900 | [diff] [blame] | 2458 | static int start_check_task(struct check *check, int mininter, |
| 2459 | int nbcheck, int srvpos) |
| 2460 | { |
| 2461 | struct task *t; |
Willy Tarreau | 6dd4ac8 | 2019-09-03 18:55:02 +0200 | [diff] [blame] | 2462 | unsigned long thread_mask = MAX_THREADS_MASK; |
| 2463 | |
| 2464 | if (check->type == PR_O2_EXT_CHK) |
| 2465 | thread_mask = 1; |
| 2466 | |
Simon Horman | 5c94242 | 2013-11-25 10:46:32 +0900 | [diff] [blame] | 2467 | /* task for the check */ |
Willy Tarreau | 6dd4ac8 | 2019-09-03 18:55:02 +0200 | [diff] [blame] | 2468 | if ((t = task_new(thread_mask)) == NULL) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2469 | ha_alert("Starting [%s:%s] check: out of memory.\n", |
| 2470 | check->server->proxy->id, check->server->id); |
Simon Horman | 5c94242 | 2013-11-25 10:46:32 +0900 | [diff] [blame] | 2471 | return 0; |
| 2472 | } |
| 2473 | |
| 2474 | check->task = t; |
| 2475 | t->process = process_chk; |
| 2476 | t->context = check; |
| 2477 | |
Willy Tarreau | 1746eec | 2014-04-25 10:46:47 +0200 | [diff] [blame] | 2478 | if (mininter < srv_getinter(check)) |
| 2479 | mininter = srv_getinter(check); |
| 2480 | |
| 2481 | if (global.max_spread_checks && mininter > global.max_spread_checks) |
| 2482 | mininter = global.max_spread_checks; |
| 2483 | |
Simon Horman | 5c94242 | 2013-11-25 10:46:32 +0900 | [diff] [blame] | 2484 | /* check this every ms */ |
Willy Tarreau | 1746eec | 2014-04-25 10:46:47 +0200 | [diff] [blame] | 2485 | t->expire = tick_add(now_ms, MS_TO_TICKS(mininter * srvpos / nbcheck)); |
Simon Horman | 5c94242 | 2013-11-25 10:46:32 +0900 | [diff] [blame] | 2486 | check->start = now; |
| 2487 | task_queue(t); |
| 2488 | |
| 2489 | return 1; |
| 2490 | } |
| 2491 | |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2492 | /* |
| 2493 | * Start health-check. |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2494 | * 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] | 2495 | */ |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2496 | static int start_checks() |
| 2497 | { |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2498 | |
| 2499 | struct proxy *px; |
| 2500 | struct server *s; |
| 2501 | struct task *t; |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2502 | int nbcheck=0, mininter=0, srvpos=0; |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2503 | |
Willy Tarreau | 2c43a1e | 2007-10-14 23:05:39 +0200 | [diff] [blame] | 2504 | /* 1- count the checkers to run simultaneously. |
| 2505 | * We also determine the minimum interval among all of those which |
| 2506 | * have an interval larger than SRV_CHK_INTER_THRES. This interval |
| 2507 | * will be used to spread their start-up date. Those which have |
Jamie Gloudon | 801a0a3 | 2012-08-25 00:18:33 -0400 | [diff] [blame] | 2508 | * a shorter interval will start independently and will not dictate |
Willy Tarreau | 2c43a1e | 2007-10-14 23:05:39 +0200 | [diff] [blame] | 2509 | * too short an interval for all others. |
| 2510 | */ |
Olivier Houchard | fbc74e8 | 2017-11-24 16:54:05 +0100 | [diff] [blame] | 2511 | for (px = proxies_list; px; px = px->next) { |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2512 | for (s = px->srv; s; s = s->next) { |
Willy Tarreau | e7b7348 | 2013-11-21 11:50:50 +0100 | [diff] [blame] | 2513 | if (s->slowstart) { |
Emeric Brun | c60def8 | 2017-09-27 14:59:38 +0200 | [diff] [blame] | 2514 | if ((t = task_new(MAX_THREADS_MASK)) == NULL) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2515 | 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] | 2516 | return ERR_ALERT | ERR_FATAL; |
Willy Tarreau | e7b7348 | 2013-11-21 11:50:50 +0100 | [diff] [blame] | 2517 | } |
| 2518 | /* We need a warmup task that will be called when the server |
| 2519 | * state switches from down to up. |
| 2520 | */ |
| 2521 | s->warmup = t; |
| 2522 | t->process = server_warmup; |
| 2523 | t->context = s; |
Baptiste Assmann | 6076d1c | 2015-09-17 22:53:59 +0200 | [diff] [blame] | 2524 | /* server can be in this state only because of */ |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 2525 | if (s->next_state == SRV_ST_STARTING) |
Baptiste Assmann | 6076d1c | 2015-09-17 22:53:59 +0200 | [diff] [blame] | 2526 | 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] | 2527 | } |
| 2528 | |
Willy Tarreau | d8514a2 | 2013-12-11 21:10:14 +0100 | [diff] [blame] | 2529 | if (s->check.state & CHK_ST_CONFIGURED) { |
| 2530 | nbcheck++; |
| 2531 | if ((srv_getinter(&s->check) >= SRV_CHK_INTER_THRES) && |
| 2532 | (!mininter || mininter > srv_getinter(&s->check))) |
| 2533 | mininter = srv_getinter(&s->check); |
| 2534 | } |
Willy Tarreau | 15f3910 | 2013-12-11 20:41:18 +0100 | [diff] [blame] | 2535 | |
Willy Tarreau | d8514a2 | 2013-12-11 21:10:14 +0100 | [diff] [blame] | 2536 | if (s->agent.state & CHK_ST_CONFIGURED) { |
| 2537 | nbcheck++; |
| 2538 | if ((srv_getinter(&s->agent) >= SRV_CHK_INTER_THRES) && |
| 2539 | (!mininter || mininter > srv_getinter(&s->agent))) |
| 2540 | mininter = srv_getinter(&s->agent); |
| 2541 | } |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2542 | } |
| 2543 | } |
| 2544 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2545 | if (!nbcheck) |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2546 | return 0; |
| 2547 | |
| 2548 | srand((unsigned)time(NULL)); |
| 2549 | |
| 2550 | /* |
| 2551 | * 2- start them as far as possible from each others. For this, we will |
| 2552 | * start them after their interval set to the min interval divided by |
| 2553 | * the number of servers, weighted by the server's position in the list. |
| 2554 | */ |
Olivier Houchard | fbc74e8 | 2017-11-24 16:54:05 +0100 | [diff] [blame] | 2555 | for (px = proxies_list; px; px = px->next) { |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2556 | if ((px->options2 & PR_O2_CHK_ANY) == PR_O2_EXT_CHK) { |
| 2557 | if (init_pid_list()) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2558 | ha_alert("Starting [%s] check: out of memory.\n", px->id); |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2559 | return ERR_ALERT | ERR_FATAL; |
Simon Horman | 98637e5 | 2014-06-20 12:30:16 +0900 | [diff] [blame] | 2560 | } |
| 2561 | } |
| 2562 | |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2563 | for (s = px->srv; s; s = s->next) { |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2564 | /* A task for the main check */ |
Willy Tarreau | ff5ae35 | 2013-12-11 20:36:34 +0100 | [diff] [blame] | 2565 | if (s->check.state & CHK_ST_CONFIGURED) { |
Cyril Bonté | 99c5bf5 | 2014-08-07 01:55:38 +0200 | [diff] [blame] | 2566 | if (s->check.type == PR_O2_EXT_CHK) { |
| 2567 | if (!prepare_external_check(&s->check)) |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2568 | return ERR_ALERT | ERR_FATAL; |
Cyril Bonté | 99c5bf5 | 2014-08-07 01:55:38 +0200 | [diff] [blame] | 2569 | } |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2570 | if (!start_check_task(&s->check, mininter, nbcheck, srvpos)) |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2571 | return ERR_ALERT | ERR_FATAL; |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2572 | srvpos++; |
| 2573 | } |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2574 | |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2575 | /* A task for a auxiliary agent check */ |
Willy Tarreau | ff5ae35 | 2013-12-11 20:36:34 +0100 | [diff] [blame] | 2576 | if (s->agent.state & CHK_ST_CONFIGURED) { |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2577 | if (!start_check_task(&s->agent, mininter, nbcheck, srvpos)) { |
Willy Tarreau | 865c514 | 2016-12-21 20:04:48 +0100 | [diff] [blame] | 2578 | return ERR_ALERT | ERR_FATAL; |
Simon Horman | d60d691 | 2013-11-25 10:46:36 +0900 | [diff] [blame] | 2579 | } |
| 2580 | srvpos++; |
| 2581 | } |
Krzysztof Oledzki | b304dc7 | 2007-10-14 23:40:01 +0200 | [diff] [blame] | 2582 | } |
| 2583 | } |
| 2584 | return 0; |
| 2585 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2586 | |
| 2587 | /* |
Willy Tarreau | 5b3a202 | 2012-09-28 15:01:02 +0200 | [diff] [blame] | 2588 | * Perform content verification check on data in s->check.buffer buffer. |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2589 | * The buffer MUST be terminated by a null byte before calling this function. |
| 2590 | * Sets server status appropriately. The caller is responsible for ensuring |
| 2591 | * that the buffer contains at least 13 characters. If <done> is zero, we may |
| 2592 | * return 0 to indicate that data is required to decide of a match. |
| 2593 | */ |
| 2594 | static int httpchk_expect(struct server *s, int done) |
| 2595 | { |
Christopher Faulet | 1bc04c7 | 2017-10-29 20:14:08 +0100 | [diff] [blame] | 2596 | static THREAD_LOCAL char status_msg[] = "HTTP status check returned code <000>"; |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2597 | char status_code[] = "000"; |
| 2598 | char *contentptr; |
| 2599 | int crlf; |
| 2600 | int ret; |
| 2601 | |
| 2602 | switch (s->proxy->options2 & PR_O2_EXP_TYPE) { |
| 2603 | case PR_O2_EXP_STS: |
| 2604 | case PR_O2_EXP_RSTS: |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2605 | memcpy(status_code, b_head(&s->check.bi) + 9, 3); |
| 2606 | 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] | 2607 | |
| 2608 | if ((s->proxy->options2 & PR_O2_EXP_TYPE) == PR_O2_EXP_STS) |
| 2609 | ret = strncmp(s->proxy->expect_str, status_code, 3) == 0; |
| 2610 | else |
Thierry FOURNIER | 09af0d6 | 2014-06-18 11:35:54 +0200 | [diff] [blame] | 2611 | ret = regex_exec(s->proxy->expect_regex, status_code); |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2612 | |
| 2613 | /* we necessarily have the response, so there are no partial failures */ |
| 2614 | if (s->proxy->options2 & PR_O2_EXP_INV) |
| 2615 | ret = !ret; |
| 2616 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2617 | 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] | 2618 | break; |
| 2619 | |
| 2620 | case PR_O2_EXP_STR: |
| 2621 | case PR_O2_EXP_RSTR: |
| 2622 | /* very simple response parser: ignore CR and only count consecutive LFs, |
| 2623 | * stop with contentptr pointing to first char after the double CRLF or |
| 2624 | * to '\0' if crlf < 2. |
| 2625 | */ |
| 2626 | crlf = 0; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2627 | for (contentptr = b_head(&s->check.bi); *contentptr; contentptr++) { |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2628 | if (crlf >= 2) |
| 2629 | break; |
| 2630 | if (*contentptr == '\r') |
| 2631 | continue; |
| 2632 | else if (*contentptr == '\n') |
| 2633 | crlf++; |
| 2634 | else |
| 2635 | crlf = 0; |
| 2636 | } |
| 2637 | |
| 2638 | /* Check that response contains a body... */ |
| 2639 | if (crlf < 2) { |
| 2640 | if (!done) |
| 2641 | return 0; |
| 2642 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2643 | set_server_check_status(&s->check, HCHK_STATUS_L7RSP, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2644 | "HTTP content check could not find a response body"); |
| 2645 | return 1; |
| 2646 | } |
| 2647 | |
| 2648 | /* Check that response body is not empty... */ |
| 2649 | if (*contentptr == '\0') { |
Willy Tarreau | a164fb5 | 2011-04-13 09:32:41 +0200 | [diff] [blame] | 2650 | if (!done) |
| 2651 | return 0; |
| 2652 | |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2653 | set_server_check_status(&s->check, HCHK_STATUS_L7RSP, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2654 | "HTTP content check found empty response body"); |
| 2655 | return 1; |
| 2656 | } |
| 2657 | |
| 2658 | /* Check the response content against the supplied string |
| 2659 | * or regex... */ |
| 2660 | if ((s->proxy->options2 & PR_O2_EXP_TYPE) == PR_O2_EXP_STR) |
| 2661 | ret = strstr(contentptr, s->proxy->expect_str) != NULL; |
| 2662 | else |
Thierry FOURNIER | 09af0d6 | 2014-06-18 11:35:54 +0200 | [diff] [blame] | 2663 | ret = regex_exec(s->proxy->expect_regex, contentptr); |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2664 | |
| 2665 | /* if we don't match, we may need to wait more */ |
| 2666 | if (!ret && !done) |
| 2667 | return 0; |
| 2668 | |
| 2669 | if (ret) { |
| 2670 | /* content matched */ |
| 2671 | if (s->proxy->options2 & PR_O2_EXP_INV) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2672 | set_server_check_status(&s->check, HCHK_STATUS_L7RSP, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2673 | "HTTP check matched unwanted content"); |
| 2674 | else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2675 | set_server_check_status(&s->check, HCHK_STATUS_L7OKD, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2676 | "HTTP content check matched"); |
| 2677 | } |
| 2678 | else { |
| 2679 | if (s->proxy->options2 & PR_O2_EXP_INV) |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2680 | set_server_check_status(&s->check, HCHK_STATUS_L7OKD, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2681 | "HTTP check did not match unwanted content"); |
| 2682 | else |
Simon Horman | 4a74143 | 2013-02-23 15:35:38 +0900 | [diff] [blame] | 2683 | set_server_check_status(&s->check, HCHK_STATUS_L7RSP, |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 2684 | "HTTP content check did not match"); |
| 2685 | } |
| 2686 | break; |
| 2687 | } |
| 2688 | return 1; |
| 2689 | } |
| 2690 | |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2691 | /* |
| 2692 | * return the id of a step in a send/expect session |
| 2693 | */ |
Simon Horman | e16c1b3 | 2015-01-30 11:22:57 +0900 | [diff] [blame] | 2694 | static int tcpcheck_get_step_id(struct check *check) |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2695 | { |
| 2696 | struct tcpcheck_rule *cur = NULL, *next = NULL; |
| 2697 | int i = 0; |
| 2698 | |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 2699 | /* not even started anything yet => step 0 = initial connect */ |
Baptiste Assmann | f95bc8e | 2015-04-25 16:03:06 +0200 | [diff] [blame] | 2700 | if (!check->current_step) |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 2701 | return 0; |
| 2702 | |
Simon Horman | e16c1b3 | 2015-01-30 11:22:57 +0900 | [diff] [blame] | 2703 | cur = check->last_started_step; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2704 | |
| 2705 | /* no step => first step */ |
| 2706 | if (cur == NULL) |
| 2707 | return 1; |
| 2708 | |
| 2709 | /* increment i until current step */ |
Simon Horman | e16c1b3 | 2015-01-30 11:22:57 +0900 | [diff] [blame] | 2710 | list_for_each_entry(next, check->tcpcheck_rules, list) { |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2711 | if (next->list.p == &cur->list) |
| 2712 | break; |
| 2713 | ++i; |
| 2714 | } |
| 2715 | |
| 2716 | return i; |
| 2717 | } |
| 2718 | |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2719 | /* |
| 2720 | * return the latest known comment before (including) the given stepid |
| 2721 | * returns NULL if no comment found |
| 2722 | */ |
| 2723 | static char * tcpcheck_get_step_comment(struct check *check, int stepid) |
| 2724 | { |
| 2725 | struct tcpcheck_rule *cur = NULL; |
| 2726 | char *ret = NULL; |
| 2727 | int i = 0; |
| 2728 | |
| 2729 | /* not even started anything yet, return latest comment found before any action */ |
| 2730 | if (!check->current_step) { |
| 2731 | list_for_each_entry(cur, check->tcpcheck_rules, list) { |
| 2732 | if (cur->action == TCPCHK_ACT_COMMENT) |
| 2733 | ret = cur->comment; |
| 2734 | else |
| 2735 | goto return_comment; |
| 2736 | } |
| 2737 | } |
| 2738 | |
| 2739 | i = 1; |
| 2740 | list_for_each_entry(cur, check->tcpcheck_rules, list) { |
| 2741 | if (cur->comment) |
| 2742 | ret = cur->comment; |
| 2743 | |
| 2744 | if (i >= stepid) |
| 2745 | goto return_comment; |
| 2746 | |
| 2747 | ++i; |
| 2748 | } |
| 2749 | |
| 2750 | return_comment: |
| 2751 | return ret; |
| 2752 | } |
| 2753 | |
Willy Tarreau | be74b88 | 2017-10-04 16:22:49 +0200 | [diff] [blame] | 2754 | /* proceed with next steps for the TCP checks <check>. Note that this is called |
| 2755 | * both from the connection's wake() callback and from the check scheduling task. |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 2756 | * It returns 0 on normal cases, or <0 if a close() has happened on an existing |
| 2757 | * connection, presenting the risk of an fd replacement. |
Willy Tarreau | 62ac84f | 2017-11-05 10:11:13 +0100 | [diff] [blame] | 2758 | * |
| 2759 | * Please do NOT place any return statement in this function and only leave |
Willy Tarreau | 2ab5c38 | 2019-07-17 18:48:07 +0200 | [diff] [blame] | 2760 | * via the out_end_tcpcheck label after setting retcode. |
Willy Tarreau | be74b88 | 2017-10-04 16:22:49 +0200 | [diff] [blame] | 2761 | */ |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 2762 | static int tcpcheck_main(struct check *check) |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2763 | { |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2764 | char *contentptr, *comment; |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 2765 | struct tcpcheck_rule *next; |
Baptiste Assmann | cfbd1b8 | 2015-05-02 09:00:23 +0200 | [diff] [blame] | 2766 | int done = 0, ret = 0, step = 0; |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2767 | struct conn_stream *cs = check->cs; |
| 2768 | struct connection *conn = cs_conn(cs); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2769 | struct server *s = check->server; |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2770 | struct proxy *proxy = check->proxy; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2771 | struct task *t = check->task; |
Simon Horman | e16c1b3 | 2015-01-30 11:22:57 +0900 | [diff] [blame] | 2772 | struct list *head = check->tcpcheck_rules; |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 2773 | int retcode = 0; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2774 | |
Willy Tarreau | ef95395 | 2014-10-02 14:30:14 +0200 | [diff] [blame] | 2775 | /* here, we know that the check is complete or that it failed */ |
| 2776 | if (check->result != CHK_RES_UNKNOWN) |
| 2777 | goto out_end_tcpcheck; |
| 2778 | |
| 2779 | /* We have 4 possibilities here : |
| 2780 | * 1. we've not yet attempted step 1, and step 1 is a connect, so no |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2781 | * connection attempt was made yet ; conn==NULL;current_step==NULL. |
Willy Tarreau | ef95395 | 2014-10-02 14:30:14 +0200 | [diff] [blame] | 2782 | * 2. we've not yet attempted step 1, and step 1 is a not connect or |
| 2783 | * does not exist (no rule), so a connection attempt was made |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2784 | * before coming here, conn!=NULL. |
Willy Tarreau | ef95395 | 2014-10-02 14:30:14 +0200 | [diff] [blame] | 2785 | * 3. we're coming back after having started with step 1, so we may |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2786 | * be waiting for a connection attempt to complete. conn!=NULL. |
| 2787 | * 4. the connection + handshake are complete. conn!=NULL. |
Willy Tarreau | ef95395 | 2014-10-02 14:30:14 +0200 | [diff] [blame] | 2788 | * |
| 2789 | * #2 and #3 are quite similar, we want both the connection and the |
| 2790 | * handshake to complete before going any further. Thus we must always |
| 2791 | * wait for a connection to complete unless we're before and existing |
| 2792 | * step 1. |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2793 | */ |
Willy Tarreau | 449f952 | 2015-05-13 15:39:48 +0200 | [diff] [blame] | 2794 | |
| 2795 | /* find first rule and skip comments */ |
| 2796 | next = LIST_NEXT(head, struct tcpcheck_rule *, list); |
| 2797 | while (&next->list != head && next->action == TCPCHK_ACT_COMMENT) |
| 2798 | next = LIST_NEXT(&next->list, struct tcpcheck_rule *, list); |
| 2799 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2800 | if ((check->current_step || &next->list == head) && |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 2801 | (conn->flags & CO_FL_WAIT_XPRT)) { |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2802 | /* we allow up to min(inter, timeout.connect) for a connection |
| 2803 | * to establish but only when timeout.check is set |
| 2804 | * as it may be to short for a full check otherwise |
| 2805 | */ |
| 2806 | while (tick_is_expired(t->expire, now_ms)) { |
| 2807 | int t_con; |
| 2808 | |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2809 | t_con = tick_add(t->expire, proxy->timeout.connect); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2810 | t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter)); |
| 2811 | |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2812 | if (proxy->timeout.check) |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2813 | t->expire = tick_first(t->expire, t_con); |
| 2814 | } |
Christopher Faulet | b610285 | 2017-11-28 10:06:29 +0100 | [diff] [blame] | 2815 | goto out; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2816 | } |
| 2817 | |
Willy Tarreau | ef95395 | 2014-10-02 14:30:14 +0200 | [diff] [blame] | 2818 | /* special case: option tcp-check with no rule, a connect is enough */ |
Willy Tarreau | 449f952 | 2015-05-13 15:39:48 +0200 | [diff] [blame] | 2819 | if (&next->list == head) { |
Willy Tarreau | ef95395 | 2014-10-02 14:30:14 +0200 | [diff] [blame] | 2820 | set_server_check_status(check, HCHK_STATUS_L4OK, NULL); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2821 | goto out_end_tcpcheck; |
Willy Tarreau | ef95395 | 2014-10-02 14:30:14 +0200 | [diff] [blame] | 2822 | } |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2823 | |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 2824 | /* no step means first step initialisation */ |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2825 | if (check->current_step == NULL) { |
Willy Tarreau | 213c678 | 2014-10-02 14:51:02 +0200 | [diff] [blame] | 2826 | check->last_started_step = NULL; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2827 | b_reset(&check->bo); |
| 2828 | b_reset(&check->bi); |
Willy Tarreau | 449f952 | 2015-05-13 15:39:48 +0200 | [diff] [blame] | 2829 | check->current_step = next; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2830 | t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter)); |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 2831 | if (proxy->timeout.check) |
| 2832 | t->expire = tick_add_ifset(now_ms, proxy->timeout.check); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2833 | } |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 2834 | |
Willy Tarreau | abca5b6 | 2013-12-06 14:19:25 +0100 | [diff] [blame] | 2835 | while (1) { |
Willy Tarreau | 263013d | 2015-05-13 11:59:14 +0200 | [diff] [blame] | 2836 | /* We have to try to flush the output buffer before reading, at |
| 2837 | * the end, or if we're about to send a string that does not fit |
| 2838 | * in the remaining space. That explains why we break out of the |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2839 | * loop after this control. If we have data, conn is valid. |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 2840 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2841 | if (b_data(&check->bo) && |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 2842 | (&check->current_step->list == head || |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 2843 | check->current_step->action != TCPCHK_ACT_SEND || |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2844 | check->current_step->string_len >= b_room(&check->bo))) { |
Willy Tarreau | deccd11 | 2018-06-14 18:38:55 +0200 | [diff] [blame] | 2845 | int ret; |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 2846 | |
Olivier Houchard | ed0f207 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 2847 | ret = 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] | 2848 | b_realign_if_empty(&check->bo); |
Willy Tarreau | deccd11 | 2018-06-14 18:38:55 +0200 | [diff] [blame] | 2849 | |
| 2850 | if (ret <= 0) { |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 2851 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) { |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 2852 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 2853 | goto out_end_tcpcheck; |
| 2854 | } |
Willy Tarreau | 263013d | 2015-05-13 11:59:14 +0200 | [diff] [blame] | 2855 | break; |
Willy Tarreau | abca5b6 | 2013-12-06 14:19:25 +0100 | [diff] [blame] | 2856 | } |
Olivier Houchard | 4501c3e | 2018-08-28 19:36:18 +0200 | [diff] [blame] | 2857 | if (b_data(&check->bo)) { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 2858 | cs->conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list); |
Olivier Houchard | 4501c3e | 2018-08-28 19:36:18 +0200 | [diff] [blame] | 2859 | goto out; |
| 2860 | } |
Willy Tarreau | abca5b6 | 2013-12-06 14:19:25 +0100 | [diff] [blame] | 2861 | } |
| 2862 | |
Willy Tarreau | 263013d | 2015-05-13 11:59:14 +0200 | [diff] [blame] | 2863 | if (&check->current_step->list == head) |
Willy Tarreau | abca5b6 | 2013-12-06 14:19:25 +0100 | [diff] [blame] | 2864 | break; |
| 2865 | |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 2866 | /* have 'next' point to the next rule or NULL if we're on the |
| 2867 | * last one, connect() needs this. |
| 2868 | */ |
Willy Tarreau | 5581c27 | 2015-05-13 12:24:53 +0200 | [diff] [blame] | 2869 | next = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2870 | |
| 2871 | /* bypass all comment rules */ |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 2872 | while (&next->list != head && next->action == TCPCHK_ACT_COMMENT) |
Willy Tarreau | 5581c27 | 2015-05-13 12:24:53 +0200 | [diff] [blame] | 2873 | next = LIST_NEXT(&next->list, struct tcpcheck_rule *, list); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 2874 | |
| 2875 | /* NULL if we're on the last rule */ |
Willy Tarreau | f3d3482 | 2014-12-08 12:11:28 +0100 | [diff] [blame] | 2876 | if (&next->list == head) |
| 2877 | next = NULL; |
| 2878 | |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2879 | if (check->current_step->action == TCPCHK_ACT_CONNECT) { |
| 2880 | struct protocol *proto; |
| 2881 | struct xprt_ops *xprt; |
| 2882 | |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2883 | /* For a connect action we'll create a new connection. |
| 2884 | * We may also have to kill a previous one. But we don't |
| 2885 | * want to leave *without* a connection if we came here |
| 2886 | * from the connection layer, hence with a connection. |
| 2887 | * Thus we'll proceed in the following order : |
| 2888 | * 1: close but not release previous connection |
| 2889 | * 2: try to get a new connection |
| 2890 | * 3: release and replace the old one on success |
| 2891 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2892 | if (check->cs) { |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 2893 | cs_close(check->cs); |
| 2894 | retcode = -1; /* do not reuse the fd in the caller! */ |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2895 | } |
| 2896 | |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2897 | /* mark the step as started */ |
| 2898 | check->last_started_step = check->current_step; |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2899 | |
| 2900 | /* prepare new connection */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2901 | cs = cs_new(NULL); |
| 2902 | if (!cs) { |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2903 | step = tcpcheck_get_step_id(check); |
| 2904 | chunk_printf(&trash, "TCPCHK error allocating connection at step %d", step); |
| 2905 | comment = tcpcheck_get_step_comment(check, step); |
| 2906 | if (comment) |
| 2907 | chunk_appendf(&trash, " comment: '%s'", comment); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 2908 | set_server_check_status(check, HCHK_STATUS_SOCKERR, |
| 2909 | trash.area); |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2910 | check->current_step = NULL; |
Christopher Faulet | b610285 | 2017-11-28 10:06:29 +0100 | [diff] [blame] | 2911 | goto out; |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2912 | } |
| 2913 | |
Olivier Houchard | 4906554 | 2019-05-31 19:20:36 +0200 | [diff] [blame] | 2914 | if (check->cs) { |
| 2915 | if (check->wait_list.events) |
| 2916 | cs->conn->xprt->unsubscribe(cs->conn, |
| 2917 | cs->conn->xprt_ctx, |
| 2918 | check->wait_list.events, |
| 2919 | &check->wait_list); |
Willy Tarreau | 86eded6 | 2019-06-14 14:47:49 +0200 | [diff] [blame] | 2920 | /* We may have been scheduled to run, and the |
| 2921 | * I/O handler expects to have a cs, so remove |
| 2922 | * the tasklet |
| 2923 | */ |
| 2924 | tasklet_remove_from_tasklet_list(check->wait_list.tasklet); |
Willy Tarreau | ac59f36 | 2017-10-08 11:10:19 +0200 | [diff] [blame] | 2925 | cs_destroy(check->cs); |
Olivier Houchard | 4906554 | 2019-05-31 19:20:36 +0200 | [diff] [blame] | 2926 | } |
Willy Tarreau | 0014912 | 2017-10-04 18:05:01 +0200 | [diff] [blame] | 2927 | |
Olivier Houchard | ff1e9f3 | 2019-09-20 17:18:35 +0200 | [diff] [blame] | 2928 | tasklet_set_tid(check->wait_list.tasklet, tid); |
| 2929 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 2930 | check->cs = cs; |
| 2931 | conn = cs->conn; |
Olivier Houchard | 26e1a8f | 2018-09-12 15:15:12 +0200 | [diff] [blame] | 2932 | /* Maybe there were an older connection we were waiting on */ |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 2933 | check->wait_list.events = 0; |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 2934 | conn->target = s ? &s->obj_type : &proxy->obj_type; |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2935 | |
| 2936 | /* no client address */ |
Willy Tarreau | ca79f59 | 2019-07-17 19:04:47 +0200 | [diff] [blame] | 2937 | |
| 2938 | if (!sockaddr_alloc(&conn->dst)) { |
| 2939 | ret = SF_ERR_RESOURCE; |
| 2940 | goto fail_check; |
| 2941 | } |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2942 | |
Simon Horman | 41f5876 | 2015-01-30 11:22:56 +0900 | [diff] [blame] | 2943 | if (is_addr(&check->addr)) { |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2944 | /* we'll connect to the check addr specified on the server */ |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 2945 | *conn->dst = check->addr; |
Willy Tarreau | 640556c | 2014-05-09 23:38:15 +0200 | [diff] [blame] | 2946 | } |
| 2947 | else { |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2948 | /* we'll connect to the addr on the server */ |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 2949 | *conn->dst = s->addr; |
Willy Tarreau | 640556c | 2014-05-09 23:38:15 +0200 | [diff] [blame] | 2950 | } |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 2951 | proto = protocol_by_family(conn->dst->ss_family); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2952 | |
| 2953 | /* port */ |
| 2954 | if (check->current_step->port) |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 2955 | set_host_port(conn->dst, check->current_step->port); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2956 | else if (check->port) |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 2957 | set_host_port(conn->dst, check->port); |
Baptiste Assmann | 2f3a56b | 2018-03-19 12:22:41 +0100 | [diff] [blame] | 2958 | else if (s->svc_port) |
Willy Tarreau | b3c81cb | 2019-07-17 16:54:52 +0200 | [diff] [blame] | 2959 | set_host_port(conn->dst, s->svc_port); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2960 | |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2961 | if (check->current_step->conn_opts & TCPCHK_OPT_SSL) { |
Willy Tarreau | a261e9b | 2016-12-22 20:44:00 +0100 | [diff] [blame] | 2962 | xprt = xprt_get(XPRT_SSL); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2963 | } |
| 2964 | else { |
Willy Tarreau | a261e9b | 2016-12-22 20:44:00 +0100 | [diff] [blame] | 2965 | xprt = xprt_get(XPRT_RAW); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2966 | } |
Willy Tarreau | be37315 | 2018-09-06 11:45:30 +0200 | [diff] [blame] | 2967 | |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2968 | conn_prepare(conn, proto, xprt); |
Willy Tarreau | 2ab5c38 | 2019-07-17 18:48:07 +0200 | [diff] [blame] | 2969 | |
| 2970 | if (conn_install_mux(conn, &mux_pt_ops, cs, proxy, NULL) < 0) { |
| 2971 | ret = SF_ERR_RESOURCE; |
| 2972 | goto fail_check; |
| 2973 | } |
| 2974 | |
Willy Tarreau | be37315 | 2018-09-06 11:45:30 +0200 | [diff] [blame] | 2975 | cs_attach(cs, check, &check_conn_cb); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2976 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2977 | ret = SF_ERR_INTERNAL; |
Ricardo Nabinger Sanchez | 4bccea9 | 2019-03-28 21:42:23 -0300 | [diff] [blame] | 2978 | if (proto && proto->connect) |
Willy Tarreau | f3d3482 | 2014-12-08 12:11:28 +0100 | [diff] [blame] | 2979 | ret = proto->connect(conn, |
Willy Tarreau | 74ab7d2 | 2020-01-24 17:52:37 +0100 | [diff] [blame] | 2980 | CONNECT_HAS_DATA /* I/O polling is always needed */ | ((next && next->action == TCPCHK_ACT_EXPECT) ? 0 : CONNECT_DELACK_ALWAYS)); |
Olivier Houchard | 37d7897 | 2019-12-30 15:13:42 +0100 | [diff] [blame] | 2981 | if (conn_ctrl_ready(conn) && |
| 2982 | check->current_step->conn_opts & TCPCHK_OPT_SEND_PROXY) { |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2983 | conn->send_proxy_ofs = 1; |
| 2984 | conn->flags |= CO_FL_SEND_PROXY; |
Olivier Houchard | fe50bfb | 2019-05-27 12:09:19 +0200 | [diff] [blame] | 2985 | if (xprt_add_hs(conn) < 0) |
| 2986 | ret = SF_ERR_RESOURCE; |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2987 | } |
| 2988 | |
| 2989 | /* It can return one of : |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2990 | * - SF_ERR_NONE if everything's OK |
| 2991 | * - SF_ERR_SRVTO if there are no more servers |
| 2992 | * - SF_ERR_SRVCL if the connection was refused by the server |
| 2993 | * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn) |
| 2994 | * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...) |
| 2995 | * - SF_ERR_INTERNAL for any other purely internal errors |
Tim Düsterhus | 4896c44 | 2016-11-29 02:15:19 +0100 | [diff] [blame] | 2996 | * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted. |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 2997 | * Note that we try to prevent the network stack from sending the ACK during the |
| 2998 | * connect() when a pure TCP check is used (without PROXY protocol). |
| 2999 | */ |
Willy Tarreau | 2ab5c38 | 2019-07-17 18:48:07 +0200 | [diff] [blame] | 3000 | fail_check: |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3001 | switch (ret) { |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 3002 | case SF_ERR_NONE: |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3003 | /* we allow up to min(inter, timeout.connect) for a connection |
| 3004 | * to establish but only when timeout.check is set |
| 3005 | * as it may be to short for a full check otherwise |
| 3006 | */ |
| 3007 | t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter)); |
| 3008 | |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 3009 | if (proxy->timeout.check && proxy->timeout.connect) { |
| 3010 | int t_con = tick_add(now_ms, proxy->timeout.connect); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3011 | t->expire = tick_first(t->expire, t_con); |
| 3012 | } |
| 3013 | break; |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 3014 | case SF_ERR_SRVTO: /* ETIMEDOUT */ |
| 3015 | case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */ |
Baptiste Assmann | cfbd1b8 | 2015-05-02 09:00:23 +0200 | [diff] [blame] | 3016 | step = tcpcheck_get_step_id(check); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3017 | chunk_printf(&trash, "TCPCHK error establishing connection at step %d: %s", |
Baptiste Assmann | cfbd1b8 | 2015-05-02 09:00:23 +0200 | [diff] [blame] | 3018 | step, strerror(errno)); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3019 | comment = tcpcheck_get_step_comment(check, step); |
| 3020 | if (comment) |
| 3021 | chunk_appendf(&trash, " comment: '%s'", comment); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 3022 | set_server_check_status(check, HCHK_STATUS_L4CON, |
| 3023 | trash.area); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3024 | goto out_end_tcpcheck; |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 3025 | case SF_ERR_PRXCOND: |
| 3026 | case SF_ERR_RESOURCE: |
| 3027 | case SF_ERR_INTERNAL: |
Baptiste Assmann | cfbd1b8 | 2015-05-02 09:00:23 +0200 | [diff] [blame] | 3028 | step = tcpcheck_get_step_id(check); |
| 3029 | chunk_printf(&trash, "TCPCHK error establishing connection at step %d", step); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3030 | comment = tcpcheck_get_step_comment(check, step); |
| 3031 | if (comment) |
| 3032 | chunk_appendf(&trash, " comment: '%s'", comment); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 3033 | set_server_check_status(check, HCHK_STATUS_SOCKERR, |
| 3034 | trash.area); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3035 | goto out_end_tcpcheck; |
| 3036 | } |
| 3037 | |
| 3038 | /* allow next rule */ |
Willy Tarreau | 5581c27 | 2015-05-13 12:24:53 +0200 | [diff] [blame] | 3039 | check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3040 | |
| 3041 | /* bypass all comment rules */ |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3042 | while (&check->current_step->list != head && |
| 3043 | check->current_step->action == TCPCHK_ACT_COMMENT) |
Willy Tarreau | 5581c27 | 2015-05-13 12:24:53 +0200 | [diff] [blame] | 3044 | check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list); |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3045 | |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3046 | if (&check->current_step->list == head) |
| 3047 | break; |
| 3048 | |
Willy Tarreau | 7df8ca6 | 2019-07-15 10:57:51 +0200 | [diff] [blame] | 3049 | /* don't do anything until the connection is established */ |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 3050 | if (conn->flags & CO_FL_WAIT_XPRT) |
Willy Tarreau | 7df8ca6 | 2019-07-15 10:57:51 +0200 | [diff] [blame] | 3051 | break; |
| 3052 | |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3053 | } /* end 'connect' */ |
| 3054 | else if (check->current_step->action == TCPCHK_ACT_SEND) { |
| 3055 | /* mark the step as started */ |
| 3056 | check->last_started_step = check->current_step; |
| 3057 | |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3058 | /* reset the read buffer */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3059 | if (*b_head(&check->bi) != '\0') { |
| 3060 | *b_head(&check->bi) = '\0'; |
| 3061 | b_reset(&check->bi); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3062 | } |
| 3063 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3064 | if (check->current_step->string_len >= b_size(&check->bo)) { |
Willy Tarreau | 506a29a | 2018-07-18 10:07:58 +0200 | [diff] [blame] | 3065 | chunk_printf(&trash, "tcp-check send : string too large (%d) for buffer size (%u) at step %d", |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3066 | check->current_step->string_len, (unsigned int)b_size(&check->bo), |
Simon Horman | e16c1b3 | 2015-01-30 11:22:57 +0900 | [diff] [blame] | 3067 | tcpcheck_get_step_id(check)); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 3068 | set_server_check_status(check, HCHK_STATUS_L7RSP, |
| 3069 | trash.area); |
Willy Tarreau | abca5b6 | 2013-12-06 14:19:25 +0100 | [diff] [blame] | 3070 | goto out_end_tcpcheck; |
| 3071 | } |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3072 | |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 3073 | /* do not try to send if there is no space */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3074 | if (check->current_step->string_len >= b_room(&check->bo)) |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 3075 | continue; |
| 3076 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3077 | b_putblk(&check->bo, check->current_step->string, check->current_step->string_len); |
| 3078 | *b_tail(&check->bo) = '\0'; /* to make gdb output easier to read */ |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3079 | |
Willy Tarreau | abca5b6 | 2013-12-06 14:19:25 +0100 | [diff] [blame] | 3080 | /* go to next rule and try to send */ |
Willy Tarreau | 5581c27 | 2015-05-13 12:24:53 +0200 | [diff] [blame] | 3081 | check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3082 | |
| 3083 | /* bypass all comment rules */ |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3084 | while (&check->current_step->list != head && |
| 3085 | check->current_step->action == TCPCHK_ACT_COMMENT) |
Willy Tarreau | 5581c27 | 2015-05-13 12:24:53 +0200 | [diff] [blame] | 3086 | check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list); |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3087 | |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3088 | } /* end 'send' */ |
Willy Tarreau | 98aec9f | 2013-12-06 16:16:41 +0100 | [diff] [blame] | 3089 | else if (check->current_step->action == TCPCHK_ACT_EXPECT) { |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 3090 | if (unlikely(check->result == CHK_RES_FAILED)) |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3091 | goto out_end_tcpcheck; |
| 3092 | |
Olivier Houchard | 0ba6c85 | 2019-07-18 15:09:08 +0200 | [diff] [blame] | 3093 | /* If we already subscribed, then we tried to received |
| 3094 | * and failed, so there's no point trying again. |
| 3095 | */ |
| 3096 | if (check->wait_list.events & SUB_RETRY_RECV) |
| 3097 | break; |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 3098 | if (cs->conn->mux->rcv_buf(cs, &check->bi, b_size(&check->bi), 0) <= 0) { |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 3099 | if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) { |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 3100 | done = 1; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3101 | if ((conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) && !b_data(&check->bi)) { |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 3102 | /* Report network errors only if we got no other data. Otherwise |
| 3103 | * we'll let the upper layers decide whether the response is OK |
| 3104 | * or not. It is very common that an RST sent by the server is |
| 3105 | * reported as an error just after the last data chunk. |
| 3106 | */ |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 3107 | chk_report_conn_err(check, errno, 0); |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 3108 | goto out_end_tcpcheck; |
| 3109 | } |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3110 | } |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 3111 | else { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 3112 | conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list); |
Willy Tarreau | 263013d | 2015-05-13 11:59:14 +0200 | [diff] [blame] | 3113 | break; |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 3114 | } |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3115 | } |
| 3116 | |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3117 | /* mark the step as started */ |
| 3118 | check->last_started_step = check->current_step; |
| 3119 | |
| 3120 | |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3121 | /* Intermediate or complete response received. |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3122 | * Terminate string in b_head(&check->bi) buffer. |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3123 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3124 | if (b_data(&check->bi) < b_size(&check->bi)) { |
| 3125 | b_head(&check->bi)[b_data(&check->bi)] = '\0'; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3126 | } |
| 3127 | else { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3128 | b_head(&check->bi)[b_data(&check->bi) - 1] = '\0'; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3129 | done = 1; /* buffer full, don't wait for more data */ |
| 3130 | } |
| 3131 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3132 | contentptr = b_head(&check->bi); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3133 | |
| 3134 | /* Check that response body is not empty... */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3135 | if (!b_data(&check->bi)) { |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3136 | if (!done) |
Willy Tarreau | fbe0edf | 2013-12-06 16:54:31 +0100 | [diff] [blame] | 3137 | continue; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3138 | |
| 3139 | /* empty response */ |
Baptiste Assmann | cfbd1b8 | 2015-05-02 09:00:23 +0200 | [diff] [blame] | 3140 | step = tcpcheck_get_step_id(check); |
| 3141 | chunk_printf(&trash, "TCPCHK got an empty response at step %d", step); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3142 | comment = tcpcheck_get_step_comment(check, step); |
| 3143 | if (comment) |
| 3144 | chunk_appendf(&trash, " comment: '%s'", comment); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 3145 | set_server_check_status(check, HCHK_STATUS_L7RSP, |
| 3146 | trash.area); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3147 | |
| 3148 | goto out_end_tcpcheck; |
| 3149 | } |
| 3150 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3151 | if (!done && (check->current_step->string != NULL) && (b_data(&check->bi) < check->current_step->string_len) ) |
Willy Tarreau | a970c28 | 2013-12-06 12:47:19 +0100 | [diff] [blame] | 3152 | continue; /* try to read more */ |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3153 | |
Willy Tarreau | a970c28 | 2013-12-06 12:47:19 +0100 | [diff] [blame] | 3154 | tcpcheck_expect: |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 3155 | if (check->current_step->string != NULL) |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3156 | ret = my_memmem(contentptr, b_data(&check->bi), check->current_step->string, check->current_step->string_len) != NULL; |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 3157 | else if (check->current_step->expect_regex != NULL) |
| 3158 | ret = regex_exec(check->current_step->expect_regex, contentptr); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3159 | |
| 3160 | if (!ret && !done) |
Willy Tarreau | a970c28 | 2013-12-06 12:47:19 +0100 | [diff] [blame] | 3161 | continue; /* try to read more */ |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3162 | |
| 3163 | /* matched */ |
Baptiste Assmann | cfbd1b8 | 2015-05-02 09:00:23 +0200 | [diff] [blame] | 3164 | step = tcpcheck_get_step_id(check); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3165 | if (ret) { |
| 3166 | /* matched but we did not want to => ERROR */ |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 3167 | if (check->current_step->inverse) { |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3168 | /* we were looking for a string */ |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 3169 | if (check->current_step->string != NULL) { |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3170 | chunk_printf(&trash, "TCPCHK matched unwanted content '%s' at step %d", |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 3171 | check->current_step->string, step); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3172 | } |
| 3173 | else { |
| 3174 | /* we were looking for a regex */ |
Baptiste Assmann | cfbd1b8 | 2015-05-02 09:00:23 +0200 | [diff] [blame] | 3175 | chunk_printf(&trash, "TCPCHK matched unwanted content (regex) at step %d", step); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3176 | } |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3177 | comment = tcpcheck_get_step_comment(check, step); |
| 3178 | if (comment) |
| 3179 | chunk_appendf(&trash, " comment: '%s'", comment); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 3180 | set_server_check_status(check, HCHK_STATUS_L7RSP, |
| 3181 | trash.area); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3182 | goto out_end_tcpcheck; |
| 3183 | } |
| 3184 | /* matched and was supposed to => OK, next step */ |
| 3185 | else { |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3186 | /* allow next rule */ |
Willy Tarreau | 5581c27 | 2015-05-13 12:24:53 +0200 | [diff] [blame] | 3187 | check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3188 | |
| 3189 | /* bypass all comment rules */ |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3190 | while (&check->current_step->list != head && |
| 3191 | check->current_step->action == TCPCHK_ACT_COMMENT) |
Willy Tarreau | 5581c27 | 2015-05-13 12:24:53 +0200 | [diff] [blame] | 3192 | check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3193 | |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3194 | if (&check->current_step->list == head) |
| 3195 | break; |
| 3196 | |
Willy Tarreau | 98aec9f | 2013-12-06 16:16:41 +0100 | [diff] [blame] | 3197 | if (check->current_step->action == TCPCHK_ACT_EXPECT) |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3198 | goto tcpcheck_expect; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3199 | } |
| 3200 | } |
| 3201 | else { |
| 3202 | /* not matched */ |
| 3203 | /* not matched and was not supposed to => OK, next step */ |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 3204 | if (check->current_step->inverse) { |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3205 | /* allow next rule */ |
Willy Tarreau | 5581c27 | 2015-05-13 12:24:53 +0200 | [diff] [blame] | 3206 | check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3207 | |
| 3208 | /* bypass all comment rules */ |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3209 | while (&check->current_step->list != head && |
| 3210 | check->current_step->action == TCPCHK_ACT_COMMENT) |
Willy Tarreau | 5581c27 | 2015-05-13 12:24:53 +0200 | [diff] [blame] | 3211 | check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list); |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3212 | |
Willy Tarreau | f2c8735 | 2015-05-13 12:08:21 +0200 | [diff] [blame] | 3213 | if (&check->current_step->list == head) |
| 3214 | break; |
| 3215 | |
Willy Tarreau | 98aec9f | 2013-12-06 16:16:41 +0100 | [diff] [blame] | 3216 | if (check->current_step->action == TCPCHK_ACT_EXPECT) |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3217 | goto tcpcheck_expect; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3218 | } |
| 3219 | /* not matched but was supposed to => ERROR */ |
| 3220 | else { |
| 3221 | /* we were looking for a string */ |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 3222 | if (check->current_step->string != NULL) { |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3223 | chunk_printf(&trash, "TCPCHK did not match content '%s' at step %d", |
Willy Tarreau | ce8c42a | 2015-05-13 11:23:01 +0200 | [diff] [blame] | 3224 | check->current_step->string, step); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3225 | } |
| 3226 | else { |
| 3227 | /* we were looking for a regex */ |
| 3228 | chunk_printf(&trash, "TCPCHK did not match content (regex) at step %d", |
Baptiste Assmann | cfbd1b8 | 2015-05-02 09:00:23 +0200 | [diff] [blame] | 3229 | step); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3230 | } |
Baptiste Assmann | 22b09d2 | 2015-05-01 08:03:04 +0200 | [diff] [blame] | 3231 | comment = tcpcheck_get_step_comment(check, step); |
| 3232 | if (comment) |
| 3233 | chunk_appendf(&trash, " comment: '%s'", comment); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 3234 | set_server_check_status(check, HCHK_STATUS_L7RSP, |
| 3235 | trash.area); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3236 | goto out_end_tcpcheck; |
| 3237 | } |
| 3238 | } |
| 3239 | } /* end expect */ |
| 3240 | } /* end loop over double chained step list */ |
| 3241 | |
Baptiste Assmann | 248f117 | 2018-03-01 21:49:01 +0100 | [diff] [blame] | 3242 | /* don't do anything until the connection is established */ |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 3243 | if (conn->flags & CO_FL_WAIT_XPRT) { |
Baptiste Assmann | 248f117 | 2018-03-01 21:49:01 +0100 | [diff] [blame] | 3244 | /* update expire time, should be done by process_chk */ |
| 3245 | /* we allow up to min(inter, timeout.connect) for a connection |
| 3246 | * to establish but only when timeout.check is set |
| 3247 | * as it may be to short for a full check otherwise |
| 3248 | */ |
| 3249 | while (tick_is_expired(t->expire, now_ms)) { |
| 3250 | int t_con; |
| 3251 | |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 3252 | t_con = tick_add(t->expire, proxy->timeout.connect); |
Baptiste Assmann | 248f117 | 2018-03-01 21:49:01 +0100 | [diff] [blame] | 3253 | t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter)); |
| 3254 | |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 3255 | if (proxy->timeout.check) |
Baptiste Assmann | 248f117 | 2018-03-01 21:49:01 +0100 | [diff] [blame] | 3256 | t->expire = tick_first(t->expire, t_con); |
| 3257 | } |
| 3258 | goto out; |
| 3259 | } |
| 3260 | |
Willy Tarreau | 263013d | 2015-05-13 11:59:14 +0200 | [diff] [blame] | 3261 | /* We're waiting for some I/O to complete, we've reached the end of the |
| 3262 | * rules, or both. Do what we have to do, otherwise we're done. |
| 3263 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3264 | if (&check->current_step->list == head && !b_data(&check->bo)) { |
Willy Tarreau | 263013d | 2015-05-13 11:59:14 +0200 | [diff] [blame] | 3265 | set_server_check_status(check, HCHK_STATUS_L7OKD, "(tcp-check)"); |
| 3266 | goto out_end_tcpcheck; |
| 3267 | } |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3268 | |
Willy Tarreau | 53c5a04 | 2015-05-13 11:38:17 +0200 | [diff] [blame] | 3269 | if (&check->current_step->list != head && |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 3270 | check->current_step->action == TCPCHK_ACT_EXPECT) |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 3271 | __event_srv_chk_r(cs); |
Christopher Faulet | b610285 | 2017-11-28 10:06:29 +0100 | [diff] [blame] | 3272 | goto out; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3273 | |
| 3274 | out_end_tcpcheck: |
| 3275 | /* collect possible new errors */ |
Willy Tarreau | ef91c93 | 2019-07-23 14:37:47 +0200 | [diff] [blame] | 3276 | if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR)) |
Willy Tarreau | b5259bf | 2017-10-04 14:47:29 +0200 | [diff] [blame] | 3277 | chk_report_conn_err(check, 0, 0); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3278 | |
Baptiste Assmann | 69e273f | 2013-12-11 00:52:19 +0100 | [diff] [blame] | 3279 | /* cleanup before leaving */ |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3280 | check->current_step = NULL; |
| 3281 | |
Willy Tarreau | 6aaa1b8 | 2013-12-11 17:09:34 +0100 | [diff] [blame] | 3282 | if (check->result == CHK_RES_FAILED) |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3283 | conn->flags |= CO_FL_ERROR; |
| 3284 | |
Christopher Faulet | b610285 | 2017-11-28 10:06:29 +0100 | [diff] [blame] | 3285 | out: |
Willy Tarreau | 6bdcab0 | 2017-10-04 18:41:00 +0200 | [diff] [blame] | 3286 | return retcode; |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3287 | } |
| 3288 | |
Simon Horman | b1900d5 | 2015-01-30 11:22:54 +0900 | [diff] [blame] | 3289 | const char *init_check(struct check *check, int type) |
| 3290 | { |
| 3291 | check->type = type; |
| 3292 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3293 | b_reset(&check->bi); check->bi.size = global.tune.chksize; |
| 3294 | b_reset(&check->bo); check->bo.size = global.tune.chksize; |
Simon Horman | b1900d5 | 2015-01-30 11:22:54 +0900 | [diff] [blame] | 3295 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3296 | check->bi.area = calloc(check->bi.size, sizeof(char)); |
| 3297 | check->bo.area = calloc(check->bo.size, sizeof(char)); |
| 3298 | |
| 3299 | if (!check->bi.area || !check->bo.area) |
Simon Horman | b1900d5 | 2015-01-30 11:22:54 +0900 | [diff] [blame] | 3300 | return "out of memory while allocating check buffer"; |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3301 | |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 3302 | check->wait_list.tasklet = tasklet_new(); |
| 3303 | if (!check->wait_list.tasklet) |
Ilya Shipitsin | d425950 | 2020-04-08 01:07:56 +0500 | [diff] [blame] | 3304 | return "out of memory while allocating check tasklet"; |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 3305 | check->wait_list.events = 0; |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 3306 | check->wait_list.tasklet->process = event_srv_chk_io; |
| 3307 | check->wait_list.tasklet->context = check; |
Simon Horman | b1900d5 | 2015-01-30 11:22:54 +0900 | [diff] [blame] | 3308 | return NULL; |
| 3309 | } |
| 3310 | |
Simon Horman | bfb5d33 | 2015-01-30 11:22:55 +0900 | [diff] [blame] | 3311 | void free_check(struct check *check) |
| 3312 | { |
Christopher Faulet | 8892e5d | 2020-03-26 19:48:20 +0100 | [diff] [blame^] | 3313 | task_destroy(check->task); |
| 3314 | if (check->wait_list.tasklet) |
| 3315 | tasklet_free(check->wait_list.tasklet); |
| 3316 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3317 | free(check->bi.area); |
| 3318 | free(check->bo.area); |
Christopher Faulet | 23d86d1 | 2018-01-25 11:36:35 +0100 | [diff] [blame] | 3319 | if (check->cs) { |
| 3320 | free(check->cs->conn); |
| 3321 | check->cs->conn = NULL; |
| 3322 | cs_free(check->cs); |
| 3323 | check->cs = NULL; |
| 3324 | } |
Simon Horman | bfb5d33 | 2015-01-30 11:22:55 +0900 | [diff] [blame] | 3325 | } |
| 3326 | |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3327 | void email_alert_free(struct email_alert *alert) |
| 3328 | { |
| 3329 | struct tcpcheck_rule *rule, *back; |
| 3330 | |
| 3331 | if (!alert) |
| 3332 | return; |
| 3333 | |
Christopher Faulet | de1a75b | 2017-10-23 15:38:19 +0200 | [diff] [blame] | 3334 | list_for_each_entry_safe(rule, back, &alert->tcpcheck_rules, list) { |
| 3335 | LIST_DEL(&rule->list); |
| 3336 | free(rule->comment); |
| 3337 | free(rule->string); |
Dragan Dosen | 2674303 | 2019-04-30 15:54:36 +0200 | [diff] [blame] | 3338 | regex_free(rule->expect_regex); |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3339 | pool_free(pool_head_tcpcheck_rule, rule); |
Christopher Faulet | de1a75b | 2017-10-23 15:38:19 +0200 | [diff] [blame] | 3340 | } |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3341 | pool_free(pool_head_email_alert, alert); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3342 | } |
| 3343 | |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 3344 | 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] | 3345 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 3346 | struct check *check = context; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3347 | struct email_alertq *q; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3348 | struct email_alert *alert; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3349 | |
| 3350 | q = container_of(check, typeof(*q), check); |
| 3351 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 3352 | HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3353 | while (1) { |
| 3354 | if (!(check->state & CHK_ST_ENABLED)) { |
| 3355 | if (LIST_ISEMPTY(&q->email_alerts)) { |
| 3356 | /* All alerts processed, queue the task */ |
| 3357 | t->expire = TICK_ETERNITY; |
| 3358 | task_queue(t); |
Christopher Faulet | c2a89a6 | 2017-10-23 15:54:24 +0200 | [diff] [blame] | 3359 | goto end; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3360 | } |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3361 | |
| 3362 | alert = LIST_NEXT(&q->email_alerts, typeof(alert), list); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3363 | LIST_DEL(&alert->list); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3364 | t->expire = now_ms; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3365 | check->tcpcheck_rules = &alert->tcpcheck_rules; |
Olivier Houchard | 0923fa4 | 2019-01-11 18:43:04 +0100 | [diff] [blame] | 3366 | check->status = HCHK_STATUS_INI; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3367 | check->state |= CHK_ST_ENABLED; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3368 | } |
| 3369 | |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 3370 | process_chk(t, context, state); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3371 | if (check->state & CHK_ST_INPROGRESS) |
| 3372 | break; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3373 | |
| 3374 | alert = container_of(check->tcpcheck_rules, typeof(*alert), tcpcheck_rules); |
| 3375 | email_alert_free(alert); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3376 | check->tcpcheck_rules = NULL; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3377 | check->server = NULL; |
| 3378 | check->state &= ~CHK_ST_ENABLED; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3379 | } |
Christopher Faulet | c2a89a6 | 2017-10-23 15:54:24 +0200 | [diff] [blame] | 3380 | end: |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 3381 | HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3382 | return t; |
| 3383 | } |
| 3384 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3385 | /* Initializes mailer alerts for the proxy <p> using <mls> parameters. |
| 3386 | * |
| 3387 | * The function returns 1 in success case, otherwise, it returns 0 and err is |
| 3388 | * filled. |
| 3389 | */ |
| 3390 | int init_email_alert(struct mailers *mls, struct proxy *p, char **err) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3391 | { |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3392 | struct mailer *mailer; |
| 3393 | struct email_alertq *queues; |
| 3394 | const char *err_str; |
| 3395 | int i = 0; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3396 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3397 | if ((queues = calloc(mls->count, sizeof(*queues))) == NULL) { |
| 3398 | memprintf(err, "out of memory while allocating mailer alerts queues"); |
mildis | 5ab01cb | 2018-10-02 16:46:34 +0200 | [diff] [blame] | 3399 | goto fail_no_queue; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3400 | } |
| 3401 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3402 | for (mailer = mls->mailer_list; mailer; i++, mailer = mailer->next) { |
| 3403 | struct email_alertq *q = &queues[i]; |
| 3404 | struct check *check = &q->check; |
| 3405 | struct task *t; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3406 | |
| 3407 | LIST_INIT(&q->email_alerts); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 3408 | HA_SPIN_INIT(&q->lock); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3409 | check->inter = mls->timeout.mail; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3410 | check->rise = DEF_AGENT_RISETIME; |
Olivier Houchard | c98aa1f | 2019-01-11 18:17:17 +0100 | [diff] [blame] | 3411 | check->proxy = p; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3412 | check->fall = DEF_AGENT_FALLTIME; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3413 | if ((err_str = init_check(check, PR_O2_TCPCHK_CHK))) { |
| 3414 | memprintf(err, "%s", err_str); |
| 3415 | goto error; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3416 | } |
| 3417 | |
| 3418 | check->xprt = mailer->xprt; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3419 | check->addr = mailer->addr; |
Christopher Faulet | b797ae1 | 2018-03-27 15:35:35 +0200 | [diff] [blame] | 3420 | check->port = get_host_port(&mailer->addr); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3421 | |
Emeric Brun | c60def8 | 2017-09-27 14:59:38 +0200 | [diff] [blame] | 3422 | if ((t = task_new(MAX_THREADS_MASK)) == NULL) { |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3423 | memprintf(err, "out of memory while allocating mailer alerts task"); |
| 3424 | goto error; |
| 3425 | } |
| 3426 | |
| 3427 | check->task = t; |
| 3428 | t->process = process_email_alert; |
| 3429 | t->context = check; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3430 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3431 | /* check this in one ms */ |
| 3432 | t->expire = TICK_ETERNITY; |
| 3433 | check->start = now; |
| 3434 | task_queue(t); |
| 3435 | } |
| 3436 | |
| 3437 | mls->users++; |
| 3438 | free(p->email_alert.mailers.name); |
| 3439 | p->email_alert.mailers.m = mls; |
| 3440 | p->email_alert.queues = queues; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3441 | return 0; |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3442 | |
| 3443 | error: |
| 3444 | for (i = 0; i < mls->count; i++) { |
| 3445 | struct email_alertq *q = &queues[i]; |
| 3446 | struct check *check = &q->check; |
| 3447 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3448 | free_check(check); |
| 3449 | } |
| 3450 | free(queues); |
mildis | 5ab01cb | 2018-10-02 16:46:34 +0200 | [diff] [blame] | 3451 | fail_no_queue: |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3452 | return 1; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3453 | } |
| 3454 | |
| 3455 | |
| 3456 | static int add_tcpcheck_expect_str(struct list *list, const char *str) |
| 3457 | { |
| 3458 | struct tcpcheck_rule *tcpcheck; |
| 3459 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3460 | if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3461 | return 0; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3462 | memset(tcpcheck, 0, sizeof(*tcpcheck)); |
| 3463 | tcpcheck->action = TCPCHK_ACT_EXPECT; |
| 3464 | tcpcheck->string = strdup(str); |
| 3465 | tcpcheck->expect_regex = NULL; |
| 3466 | tcpcheck->comment = NULL; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3467 | if (!tcpcheck->string) { |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3468 | pool_free(pool_head_tcpcheck_rule, tcpcheck); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3469 | return 0; |
| 3470 | } |
| 3471 | |
| 3472 | LIST_ADDQ(list, &tcpcheck->list); |
| 3473 | return 1; |
| 3474 | } |
| 3475 | |
| 3476 | static int add_tcpcheck_send_strs(struct list *list, const char * const *strs) |
| 3477 | { |
| 3478 | struct tcpcheck_rule *tcpcheck; |
Willy Tarreau | 64345aa | 2016-08-10 19:29:09 +0200 | [diff] [blame] | 3479 | const char *in; |
| 3480 | char *dst; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3481 | int i; |
| 3482 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3483 | if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3484 | return 0; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3485 | memset(tcpcheck, 0, sizeof(*tcpcheck)); |
| 3486 | tcpcheck->action = TCPCHK_ACT_SEND; |
| 3487 | tcpcheck->expect_regex = NULL; |
| 3488 | tcpcheck->comment = NULL; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3489 | tcpcheck->string_len = 0; |
| 3490 | for (i = 0; strs[i]; i++) |
| 3491 | tcpcheck->string_len += strlen(strs[i]); |
| 3492 | |
| 3493 | tcpcheck->string = malloc(tcpcheck->string_len + 1); |
| 3494 | if (!tcpcheck->string) { |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3495 | pool_free(pool_head_tcpcheck_rule, tcpcheck); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3496 | return 0; |
| 3497 | } |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3498 | |
Willy Tarreau | 64345aa | 2016-08-10 19:29:09 +0200 | [diff] [blame] | 3499 | dst = tcpcheck->string; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3500 | for (i = 0; strs[i]; i++) |
Willy Tarreau | 64345aa | 2016-08-10 19:29:09 +0200 | [diff] [blame] | 3501 | for (in = strs[i]; (*dst = *in++); dst++); |
| 3502 | *dst = 0; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3503 | |
| 3504 | LIST_ADDQ(list, &tcpcheck->list); |
| 3505 | return 1; |
| 3506 | } |
| 3507 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3508 | static int enqueue_one_email_alert(struct proxy *p, struct server *s, |
| 3509 | struct email_alertq *q, const char *msg) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3510 | { |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3511 | struct email_alert *alert; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3512 | struct tcpcheck_rule *tcpcheck; |
| 3513 | struct check *check = &q->check; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3514 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3515 | if ((alert = pool_alloc(pool_head_email_alert)) == NULL) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3516 | goto error; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3517 | LIST_INIT(&alert->list); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3518 | LIST_INIT(&alert->tcpcheck_rules); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3519 | alert->srv = s; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3520 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 3521 | if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3522 | goto error; |
Christopher Faulet | 31dff9b | 2017-10-23 15:45:20 +0200 | [diff] [blame] | 3523 | memset(tcpcheck, 0, sizeof(*tcpcheck)); |
| 3524 | tcpcheck->action = TCPCHK_ACT_CONNECT; |
| 3525 | tcpcheck->comment = NULL; |
| 3526 | tcpcheck->string = NULL; |
| 3527 | tcpcheck->expect_regex = NULL; |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3528 | LIST_ADDQ(&alert->tcpcheck_rules, &tcpcheck->list); |
| 3529 | |
| 3530 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "220 ")) |
| 3531 | goto error; |
| 3532 | |
| 3533 | { |
| 3534 | const char * const strs[4] = { "EHLO ", p->email_alert.myhostname, "\r\n" }; |
| 3535 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3536 | goto error; |
| 3537 | } |
| 3538 | |
| 3539 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 ")) |
| 3540 | goto error; |
| 3541 | |
| 3542 | { |
| 3543 | const char * const strs[4] = { "MAIL FROM:<", p->email_alert.from, ">\r\n" }; |
| 3544 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3545 | goto error; |
| 3546 | } |
| 3547 | |
| 3548 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 ")) |
| 3549 | goto error; |
| 3550 | |
| 3551 | { |
| 3552 | const char * const strs[4] = { "RCPT TO:<", p->email_alert.to, ">\r\n" }; |
| 3553 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3554 | goto error; |
| 3555 | } |
| 3556 | |
| 3557 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 ")) |
| 3558 | goto error; |
| 3559 | |
| 3560 | { |
| 3561 | const char * const strs[2] = { "DATA\r\n" }; |
| 3562 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3563 | goto error; |
| 3564 | } |
| 3565 | |
| 3566 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "354 ")) |
| 3567 | goto error; |
| 3568 | |
| 3569 | { |
| 3570 | struct tm tm; |
| 3571 | char datestr[48]; |
| 3572 | const char * const strs[18] = { |
Pieter Baauw | 5e0964e | 2016-02-13 16:27:35 +0100 | [diff] [blame] | 3573 | "From: ", p->email_alert.from, "\r\n", |
| 3574 | "To: ", p->email_alert.to, "\r\n", |
| 3575 | "Date: ", datestr, "\r\n", |
| 3576 | "Subject: [HAproxy Alert] ", msg, "\r\n", |
| 3577 | "\r\n", |
| 3578 | msg, "\r\n", |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3579 | "\r\n", |
Pieter Baauw | ed35c37 | 2015-07-22 19:51:54 +0200 | [diff] [blame] | 3580 | ".\r\n", |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3581 | NULL |
| 3582 | }; |
| 3583 | |
| 3584 | get_localtime(date.tv_sec, &tm); |
| 3585 | |
| 3586 | if (strftime(datestr, sizeof(datestr), "%a, %d %b %Y %T %z (%Z)", &tm) == 0) { |
| 3587 | goto error; |
| 3588 | } |
| 3589 | |
| 3590 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3591 | goto error; |
| 3592 | } |
| 3593 | |
| 3594 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 ")) |
| 3595 | goto error; |
| 3596 | |
| 3597 | { |
| 3598 | const char * const strs[2] = { "QUIT\r\n" }; |
| 3599 | if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs)) |
| 3600 | goto error; |
| 3601 | } |
| 3602 | |
| 3603 | if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "221 ")) |
| 3604 | goto error; |
| 3605 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 3606 | HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3607 | task_wakeup(check->task, TASK_WOKEN_MSG); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3608 | LIST_ADDQ(&q->email_alerts, &alert->list); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 3609 | HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3610 | return 1; |
| 3611 | |
| 3612 | error: |
| 3613 | email_alert_free(alert); |
| 3614 | return 0; |
| 3615 | } |
| 3616 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3617 | 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] | 3618 | { |
| 3619 | int i; |
| 3620 | struct mailer *mailer; |
| 3621 | |
| 3622 | for (i = 0, mailer = p->email_alert.mailers.m->mailer_list; |
| 3623 | i < p->email_alert.mailers.m->count; i++, mailer = mailer->next) { |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3624 | 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] | 3625 | 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] | 3626 | return; |
| 3627 | } |
| 3628 | } |
| 3629 | |
| 3630 | return; |
| 3631 | } |
| 3632 | |
| 3633 | /* |
| 3634 | * Send email alert if configured. |
| 3635 | */ |
Simon Horman | 64e3416 | 2015-02-06 11:11:57 +0900 | [diff] [blame] | 3636 | void send_email_alert(struct server *s, int level, const char *format, ...) |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3637 | { |
| 3638 | va_list argp; |
| 3639 | char buf[1024]; |
| 3640 | int len; |
| 3641 | struct proxy *p = s->proxy; |
| 3642 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3643 | 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] | 3644 | return; |
| 3645 | |
| 3646 | va_start(argp, format); |
| 3647 | len = vsnprintf(buf, sizeof(buf), format, argp); |
| 3648 | va_end(argp); |
| 3649 | |
Thierry FOURNIER | 62c8a21 | 2017-02-09 12:19:27 +0100 | [diff] [blame] | 3650 | if (len < 0 || len >= sizeof(buf)) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 3651 | ha_alert("Email alert [%s] could not format message\n", p->id); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3652 | return; |
| 3653 | } |
| 3654 | |
Christopher Faulet | 0108bb3 | 2017-10-20 21:34:32 +0200 | [diff] [blame] | 3655 | enqueue_email_alert(p, s, buf); |
Simon Horman | 0ba0e4a | 2015-01-30 11:23:00 +0900 | [diff] [blame] | 3656 | } |
| 3657 | |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 3658 | /* |
| 3659 | * Return value: |
| 3660 | * the port to be used for the health check |
| 3661 | * 0 in case no port could be found for the check |
| 3662 | */ |
| 3663 | int srv_check_healthcheck_port(struct check *chk) |
| 3664 | { |
| 3665 | int i = 0; |
| 3666 | struct server *srv = NULL; |
| 3667 | |
| 3668 | srv = chk->server; |
| 3669 | |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 3670 | /* by default, we use the health check port ocnfigured */ |
| 3671 | if (chk->port > 0) |
| 3672 | return chk->port; |
| 3673 | |
| 3674 | /* try to get the port from check_core.addr if check.port not set */ |
| 3675 | i = get_host_port(&chk->addr); |
| 3676 | if (i > 0) |
| 3677 | return i; |
| 3678 | |
| 3679 | /* try to get the port from server address */ |
| 3680 | /* prevent MAPPORTS from working at this point, since checks could |
| 3681 | * not be performed in such case (MAPPORTS impose a relative ports |
| 3682 | * based on live traffic) |
| 3683 | */ |
| 3684 | if (srv->flags & SRV_F_MAPPORTS) |
| 3685 | return 0; |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 3686 | |
| 3687 | i = srv->svc_port; /* by default */ |
Baptiste Assmann | 95db2bc | 2016-06-13 14:15:41 +0200 | [diff] [blame] | 3688 | if (i > 0) |
| 3689 | return i; |
| 3690 | |
| 3691 | return 0; |
| 3692 | } |
| 3693 | |
Willy Tarreau | 172f5ce | 2018-11-26 11:21:50 +0100 | [diff] [blame] | 3694 | REGISTER_POST_CHECK(start_checks); |
Baptiste Assmann | 5ecb77f | 2013-10-06 23:24:13 +0200 | [diff] [blame] | 3695 | |
Christopher Faulet | 8892e5d | 2020-03-26 19:48:20 +0100 | [diff] [blame^] | 3696 | static int init_srv_check(struct server *srv) |
| 3697 | { |
| 3698 | const char *err; |
| 3699 | struct tcpcheck_rule *r; |
| 3700 | int ret = 0; |
| 3701 | |
| 3702 | if (!srv->do_check) |
| 3703 | goto out; |
| 3704 | |
| 3705 | |
| 3706 | /* If neither a port nor an addr was specified and no check transport |
| 3707 | * layer is forced, then the transport layer used by the checks is the |
| 3708 | * same as for the production traffic. Otherwise we use raw_sock by |
| 3709 | * default, unless one is specified. |
| 3710 | */ |
| 3711 | if (!srv->check.port && !is_addr(&srv->check.addr)) { |
| 3712 | if (!srv->check.use_ssl && srv->use_ssl != -1) { |
| 3713 | srv->check.use_ssl = srv->use_ssl; |
| 3714 | srv->check.xprt = srv->xprt; |
| 3715 | } |
| 3716 | else if (srv->check.use_ssl == 1) |
| 3717 | srv->check.xprt = xprt_get(XPRT_SSL); |
| 3718 | |
| 3719 | srv->check.send_proxy |= (srv->pp_opts); |
| 3720 | } |
| 3721 | |
| 3722 | /* validate <srv> server health-check settings */ |
| 3723 | |
| 3724 | /* We need at least a service port, a check port or the first tcp-check |
| 3725 | * rule must be a 'connect' one when checking an IPv4/IPv6 server. |
| 3726 | */ |
| 3727 | if ((srv_check_healthcheck_port(&srv->check) != 0) || |
| 3728 | (!is_inet_addr(&srv->check.addr) && (is_addr(&srv->check.addr) || !is_inet_addr(&srv->addr)))) |
| 3729 | goto init; |
| 3730 | |
| 3731 | if (!LIST_ISEMPTY(&srv->proxy->tcpcheck_rules)) { |
| 3732 | ha_alert("config: %s '%s': server '%s' has neither service port nor check port.\n", |
| 3733 | proxy_type_str(srv->proxy), srv->proxy->id, srv->id); |
| 3734 | ret |= ERR_ALERT | ERR_ABORT; |
| 3735 | goto out; |
| 3736 | } |
| 3737 | |
| 3738 | /* search the first action (connect / send / expect) in the list */ |
| 3739 | r = get_first_tcpcheck_rule(&srv->proxy->tcpcheck_rules); |
| 3740 | if (!r || (r->action != TCPCHK_ACT_CONNECT) || !r->port) { |
| 3741 | ha_alert("config: %s '%s': server '%s' has neither service port nor check port " |
| 3742 | "nor tcp_check rule 'connect' with port information.\n", |
| 3743 | proxy_type_str(srv->proxy), srv->proxy->id, srv->id); |
| 3744 | ret |= ERR_ALERT | ERR_ABORT; |
| 3745 | goto out; |
| 3746 | } |
| 3747 | |
| 3748 | /* scan the tcp-check ruleset to ensure a port has been configured */ |
| 3749 | list_for_each_entry(r, &srv->proxy->tcpcheck_rules, list) { |
| 3750 | if ((r->action == TCPCHK_ACT_CONNECT) && (!r->port)) { |
| 3751 | ha_alert("config: %s '%s': server '%s' has neither service port nor check port, " |
| 3752 | "and a tcp_check rule 'connect' with no port information.\n", |
| 3753 | proxy_type_str(srv->proxy), srv->proxy->id, srv->id); |
| 3754 | ret |= ERR_ALERT | ERR_ABORT; |
| 3755 | goto out; |
| 3756 | } |
| 3757 | } |
| 3758 | |
| 3759 | init: |
| 3760 | err = init_check(&srv->check, srv->proxy->options2 & PR_O2_CHK_ANY); |
| 3761 | if (err) { |
| 3762 | ha_alert("config: %s '%s': unable to init check for server '%s' (%s).\n", |
| 3763 | proxy_type_str(srv->proxy), srv->proxy->id, srv->id, err); |
| 3764 | ret |= ERR_ALERT | ERR_ABORT; |
| 3765 | goto out; |
| 3766 | } |
| 3767 | srv->check.state |= CHK_ST_CONFIGURED | CHK_ST_ENABLED; |
| 3768 | global.maxsock++; |
| 3769 | |
| 3770 | out: |
| 3771 | return ret; |
| 3772 | } |
| 3773 | |
| 3774 | static int init_srv_agent_check(struct server *srv) |
| 3775 | { |
| 3776 | const char *err; |
| 3777 | int ret = 0; |
| 3778 | |
| 3779 | if (!srv->do_agent) |
| 3780 | goto out; |
| 3781 | |
| 3782 | err = init_check(&srv->agent, PR_O2_LB_AGENT_CHK); |
| 3783 | if (err) { |
| 3784 | ha_alert("config: %s '%s': unable to init agent-check for server '%s' (%s).\n", |
| 3785 | proxy_type_str(srv->proxy), srv->proxy->id, srv->id, err); |
| 3786 | ret |= ERR_ALERT | ERR_ABORT; |
| 3787 | goto out; |
| 3788 | } |
| 3789 | |
| 3790 | if (!srv->agent.inter) |
| 3791 | srv->agent.inter = srv->check.inter; |
| 3792 | |
| 3793 | srv->agent.state |= CHK_ST_CONFIGURED | CHK_ST_ENABLED | CHK_ST_AGENT; |
| 3794 | global.maxsock++; |
| 3795 | |
| 3796 | out: |
| 3797 | return ret; |
| 3798 | } |
| 3799 | |
| 3800 | static void deinit_srv_check(struct server *srv) |
| 3801 | { |
| 3802 | if (srv->do_check) |
| 3803 | free_check(&srv->check); |
| 3804 | } |
| 3805 | |
| 3806 | |
| 3807 | static void deinit_srv_agent_check(struct server *srv) |
| 3808 | { |
| 3809 | if (srv->do_agent) |
| 3810 | free_check(&srv->agent); |
| 3811 | free(srv->agent.send_string); |
| 3812 | } |
| 3813 | |
| 3814 | REGISTER_POST_SERVER_CHECK(init_srv_check); |
| 3815 | REGISTER_POST_SERVER_CHECK(init_srv_agent_check); |
| 3816 | |
| 3817 | REGISTER_SERVER_DEINIT(deinit_srv_check); |
| 3818 | REGISTER_SERVER_DEINIT(deinit_srv_agent_check); |
| 3819 | |
Willy Tarreau | bd74154 | 2010-03-16 18:46:54 +0100 | [diff] [blame] | 3820 | /* |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 3821 | * Local variables: |
| 3822 | * c-indent-level: 8 |
| 3823 | * c-basic-offset: 8 |
| 3824 | * End: |
| 3825 | */ |