blob: d3920ce8da7981b9eac8b1bfe4dbd460f79d273a [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
2 * Health-checks functions.
3 *
Willy Tarreau26c25062009-03-08 09:38:41 +01004 * Copyright 2000-2009 Willy Tarreau <w@1wt.eu>
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +02005 * Copyright 2007-2009 Krzysztof Piotr Oledzki <ole@ans.pl>
Willy Tarreaubaaee002006-06-26 02:48:02 +02006 *
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 Tarreaub8816082008-01-18 12:18:15 +010014#include <assert.h>
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +020015#include <ctype.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020016#include <errno.h>
17#include <fcntl.h>
Willy Tarreau9b39dc52014-07-08 00:54:10 +020018#include <signal.h>
Simon Horman0ba0e4a2015-01-30 11:23:00 +090019#include <stdarg.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020020#include <stdio.h>
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +020021#include <stdlib.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020022#include <string.h>
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +020023#include <time.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020024#include <unistd.h>
Willy Tarreau9f6dc722019-03-01 11:15:10 +010025#include <sys/resource.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020026#include <sys/socket.h>
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040027#include <sys/types.h>
Simon Horman98637e52014-06-20 12:30:16 +090028#include <sys/wait.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020029#include <netinet/in.h>
Willy Tarreau1274bc42009-07-15 07:16:31 +020030#include <netinet/tcp.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020031#include <arpa/inet.h>
32
Willy Tarreauc7e42382012-08-24 19:22:53 +020033#include <common/chunk.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020034#include <common/compat.h>
35#include <common/config.h>
36#include <common/mini-clist.h>
Willy Tarreau83749182007-04-15 20:56:27 +020037#include <common/standard.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020038#include <common/time.h>
Christopher Fauletcfda8472017-10-20 15:40:23 +020039#include <common/hathreads.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020040
41#include <types/global.h>
Baptiste Assmanna68ca962015-04-14 01:15:08 +020042#include <types/dns.h>
William Lallemand9ed62032016-11-21 17:49:11 +010043#include <types/stats.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020044
45#include <proto/backend.h>
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +020046#include <proto/checks.h>
William Lallemand9ed62032016-11-21 17:49:11 +010047#include <proto/stats.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020048#include <proto/fd.h>
49#include <proto/log.h>
Willy Tarreau53a47662017-08-28 10:53:00 +020050#include <proto/mux_pt.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020051#include <proto/queue.h>
Willy Tarreauc6f4ce82009-06-10 11:09:37 +020052#include <proto/port_range.h>
Willy Tarreaue8c66af2008-01-13 18:40:14 +010053#include <proto/proto_tcp.h>
Baptiste Assmann69e273f2013-12-11 00:52:19 +010054#include <proto/protocol.h>
Willy Tarreau2b5652f2006-12-31 17:46:05 +010055#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020056#include <proto/server.h>
Willy Tarreau48d6bf22016-06-21 16:27:34 +020057#include <proto/signal.h>
Willy Tarreau9e000c62011-03-10 14:03:36 +010058#include <proto/stream_interface.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020059#include <proto/task.h>
Baptiste Assmanna68ca962015-04-14 01:15:08 +020060#include <proto/log.h>
61#include <proto/dns.h>
62#include <proto/proto_udp.h>
Olivier Houchard9130a962017-10-17 17:33:43 +020063#include <proto/ssl_sock.h>
Olivier Houchard9130a962017-10-17 17:33:43 +020064
Willy Tarreaubd741542010-03-16 18:46:54 +010065static int httpchk_expect(struct server *s, int done);
Simon Hormane16c1b32015-01-30 11:22:57 +090066static int tcpcheck_get_step_id(struct check *);
Baptiste Assmann22b09d22015-05-01 08:03:04 +020067static char * tcpcheck_get_step_comment(struct check *, int);
Willy Tarreau6bdcab02017-10-04 18:41:00 +020068static int tcpcheck_main(struct check *);
Olivier Houchard910b2bc2018-07-17 18:49:38 +020069static void __event_srv_chk_w(struct conn_stream *cs);
Olivier Houchard4501c3e2018-08-28 19:36:18 +020070static int wake_srv_chk(struct conn_stream *cs);
Olivier Houchardaf4021e2018-08-09 13:06:55 +020071static void __event_srv_chk_r(struct conn_stream *cs);
Willy Tarreaubd741542010-03-16 18:46:54 +010072
Willy Tarreau8ceae722018-11-26 11:58:30 +010073DECLARE_STATIC_POOL(pool_head_email_alert, "email_alert", sizeof(struct email_alert));
74DECLARE_STATIC_POOL(pool_head_tcpcheck_rule, "tcpcheck_rule", sizeof(struct tcpcheck_rule));
Christopher Faulet31dff9b2017-10-23 15:45:20 +020075
76
Simon Horman63a4a822012-03-19 07:24:41 +090077static const struct check_status check_statuses[HCHK_STATUS_SIZE] = {
Willy Tarreau6aaa1b82013-12-11 17:09:34 +010078 [HCHK_STATUS_UNKNOWN] = { CHK_RES_UNKNOWN, "UNK", "Unknown" },
79 [HCHK_STATUS_INI] = { CHK_RES_UNKNOWN, "INI", "Initializing" },
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +020080 [HCHK_STATUS_START] = { /* SPECIAL STATUS*/ },
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +020081
Willy Tarreau23964182014-05-20 20:56:30 +020082 /* Below we have finished checks */
83 [HCHK_STATUS_CHECKED] = { CHK_RES_NEUTRAL, "CHECKED", "No status change" },
Willy Tarreau6aaa1b82013-12-11 17:09:34 +010084 [HCHK_STATUS_HANA] = { CHK_RES_FAILED, "HANA", "Health analyze" },
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +010085
Willy Tarreau6aaa1b82013-12-11 17:09:34 +010086 [HCHK_STATUS_SOCKERR] = { CHK_RES_FAILED, "SOCKERR", "Socket error" },
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +020087
Willy Tarreau6aaa1b82013-12-11 17:09:34 +010088 [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 Oledzki09605412009-09-23 22:09:24 +020091
Willy Tarreau6aaa1b82013-12-11 17:09:34 +010092 [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 Oledzki09605412009-09-23 22:09:24 +020095
Willy Tarreau6aaa1b82013-12-11 17:09:34 +010096 [HCHK_STATUS_L7TOUT] = { CHK_RES_FAILED, "L7TOUT", "Layer7 timeout" },
97 [HCHK_STATUS_L7RSP] = { CHK_RES_FAILED, "L7RSP", "Layer7 invalid response" },
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +020098
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +020099 [HCHK_STATUS_L57DATA] = { /* DUMMY STATUS */ },
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200100
Willy Tarreau6aaa1b82013-12-11 17:09:34 +0100101 [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 Horman98637e52014-06-20 12:30:16 +0900104
105 [HCHK_STATUS_PROCERR] = { CHK_RES_FAILED, "PROCERR", "External check error" },
106 [HCHK_STATUS_PROCTOUT] = { CHK_RES_FAILED, "PROCTOUT", "External check timeout" },
Cyril Bonté77010d82014-08-07 01:55:37 +0200107 [HCHK_STATUS_PROCOK] = { CHK_RES_PASSED, "PROCOK", "External check passed" },
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200108};
109
Cyril Bontéac92a062014-12-27 22:28:38 +0100110const 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 },
118 [EXTCHK_HAPROXY_SERVER_ADDR] = { "HAPROXY_SERVER_ADDR", EXTCHK_SIZE_EVAL_INIT },
119 [EXTCHK_HAPROXY_SERVER_PORT] = { "HAPROXY_SERVER_PORT", EXTCHK_SIZE_EVAL_INIT },
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 Horman63a4a822012-03-19 07:24:41 +0900124static const struct analyze_status analyze_statuses[HANA_STATUS_SIZE] = { /* 0: ignore, 1: error, 2: OK */
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100125 [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
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200140/*
141 * Convert check_status code to description
142 */
143const char *get_check_status_description(short check_status) {
144
145 const char *desc;
146
147 if (check_status < HCHK_STATUS_SIZE)
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200148 desc = check_statuses[check_status].desc;
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200149 else
150 desc = NULL;
151
152 if (desc && *desc)
153 return desc;
154 else
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200155 return check_statuses[HCHK_STATUS_UNKNOWN].desc;
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200156}
157
158/*
159 * Convert check_status code to short info
160 */
161const char *get_check_status_info(short check_status) {
162
163 const char *info;
164
165 if (check_status < HCHK_STATUS_SIZE)
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200166 info = check_statuses[check_status].info;
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200167 else
168 info = NULL;
169
170 if (info && *info)
171 return info;
172 else
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200173 return check_statuses[HCHK_STATUS_UNKNOWN].info;
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200174}
175
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100176const char *get_analyze_status(short analyze_status) {
177
178 const char *desc;
179
180 if (analyze_status < HANA_STATUS_SIZE)
181 desc = analyze_statuses[analyze_status].desc;
182 else
183 desc = NULL;
184
185 if (desc && *desc)
186 return desc;
187 else
188 return analyze_statuses[HANA_STATUS_UNKNOWN].desc;
189}
190
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200191/*
Simon Horman4a741432013-02-23 15:35:38 +0900192 * Set check->status, update check->duration and fill check->result with
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200193 * an adequate CHK_RES_* value. The new check->health is computed based
194 * on the result.
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200195 *
196 * Show information in logs about failed health check if server is UP
197 * or succeeded health checks if server is DOWN.
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200198 */
Simon Horman4a741432013-02-23 15:35:38 +0900199static void set_server_check_status(struct check *check, short status, const char *desc)
Willy Tarreau19d14ef2012-10-29 16:51:55 +0100200{
Simon Horman4a741432013-02-23 15:35:38 +0900201 struct server *s = check->server;
Willy Tarreaubef1b322014-05-13 21:01:39 +0200202 short prev_status = check->status;
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200203 int report = 0;
Simon Horman4a741432013-02-23 15:35:38 +0900204
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200205 if (status == HCHK_STATUS_START) {
Willy Tarreau6aaa1b82013-12-11 17:09:34 +0100206 check->result = CHK_RES_UNKNOWN; /* no result yet */
Simon Horman4a741432013-02-23 15:35:38 +0900207 check->desc[0] = '\0';
208 check->start = now;
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200209 return;
210 }
211
Simon Horman4a741432013-02-23 15:35:38 +0900212 if (!check->status)
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200213 return;
214
Krzysztof Piotr Oledzkif7089f52009-10-10 21:06:49 +0200215 if (desc && *desc) {
Simon Horman4a741432013-02-23 15:35:38 +0900216 strncpy(check->desc, desc, HCHK_DESC_LEN-1);
217 check->desc[HCHK_DESC_LEN-1] = '\0';
Krzysztof Piotr Oledzkif7089f52009-10-10 21:06:49 +0200218 } else
Simon Horman4a741432013-02-23 15:35:38 +0900219 check->desc[0] = '\0';
Krzysztof Piotr Oledzkif7089f52009-10-10 21:06:49 +0200220
Simon Horman4a741432013-02-23 15:35:38 +0900221 check->status = status;
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200222 if (check_statuses[status].result)
Simon Horman4a741432013-02-23 15:35:38 +0900223 check->result = check_statuses[status].result;
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200224
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100225 if (status == HCHK_STATUS_HANA)
Simon Horman4a741432013-02-23 15:35:38 +0900226 check->duration = -1;
227 else if (!tv_iszero(&check->start)) {
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200228 /* set_server_check_status() may be called more than once */
Simon Horman4a741432013-02-23 15:35:38 +0900229 check->duration = tv_ms_elapsed(&check->start, &now);
230 tv_zero(&check->start);
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200231 }
232
Willy Tarreau23964182014-05-20 20:56:30 +0200233 /* no change is expected if no state change occurred */
234 if (check->result == CHK_RES_NEUTRAL)
235 return;
236
Olivier Houchard0923fa42019-01-11 18:43:04 +0100237 /* If the check was really just sending a mail, it won't have an
238 * associated server, so we're done now.
239 */
240 if (!s)
241 return;
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200242 report = 0;
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200243
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200244 switch (check->result) {
245 case CHK_RES_FAILED:
Willy Tarreau12634e12014-05-23 11:32:36 +0200246 /* Failure to connect to the agent as a secondary check should not
247 * cause the server to be marked down.
248 */
249 if ((!(check->state & CHK_ST_AGENT) ||
Simon Hormaneaabd522015-02-26 11:26:17 +0900250 (check->status >= HCHK_STATUS_L57DATA)) &&
Christopher Fauletb119a792018-05-02 12:12:45 +0200251 (check->health > 0)) {
Olivier Houchard7059c552019-03-08 18:49:32 +0100252 _HA_ATOMIC_ADD(&s->counters.failed_checks, 1);
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200253 report = 1;
254 check->health--;
255 if (check->health < check->rise)
256 check->health = 0;
257 }
258 break;
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200259
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200260 case CHK_RES_PASSED:
261 case CHK_RES_CONDPASS: /* "condpass" cannot make the first step but it OK after a "passed" */
262 if ((check->health < check->rise + check->fall - 1) &&
263 (check->result == CHK_RES_PASSED || check->health > 0)) {
264 report = 1;
265 check->health++;
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200266
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200267 if (check->health >= check->rise)
268 check->health = check->rise + check->fall - 1; /* OK now */
269 }
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200270
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200271 /* clear consecutive_errors if observing is enabled */
272 if (s->onerror)
273 s->consecutive_errors = 0;
274 break;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100275
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200276 default:
277 break;
278 }
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200279
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200280 if (s->proxy->options2 & PR_O2_LOGHCHKS &&
281 (status != prev_status || report)) {
282 chunk_printf(&trash,
Willy Tarreau12634e12014-05-23 11:32:36 +0200283 "%s check for %sserver %s/%s %s%s",
284 (check->state & CHK_ST_AGENT) ? "Agent" : "Health",
Willy Tarreauc93cd162014-05-13 15:54:22 +0200285 s->flags & SRV_F_BACKUP ? "backup " : "",
Willy Tarreau19d14ef2012-10-29 16:51:55 +0100286 s->proxy->id, s->id,
Willy Tarreau6aaa1b82013-12-11 17:09:34 +0100287 (check->result == CHK_RES_CONDPASS) ? "conditionally ":"",
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200288 (check->result >= CHK_RES_PASSED) ? "succeeded" : "failed");
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200289
Emeric Brun5a133512017-10-19 14:42:30 +0200290 srv_append_status(&trash, s, check, -1, 0);
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200291
Willy Tarreau19d14ef2012-10-29 16:51:55 +0100292 chunk_appendf(&trash, ", status: %d/%d %s",
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200293 (check->health >= check->rise) ? check->health - check->rise + 1 : check->health,
294 (check->health >= check->rise) ? check->fall : check->rise,
295 (check->health >= check->rise) ? (s->uweight ? "UP" : "DRAIN") : "DOWN");
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200296
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200297 ha_warning("%s.\n", trash.area);
298 send_log(s->proxy, LOG_NOTICE, "%s.\n", trash.area);
299 send_email_alert(s, LOG_INFO, "%s", trash.area);
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200300 }
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200301}
302
Willy Tarreau4eec5472014-05-20 22:32:27 +0200303/* Marks the check <check>'s server down if the current check is already failed
304 * and the server is not down yet nor in maintenance.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200305 */
Willy Tarreau4eec5472014-05-20 22:32:27 +0200306static void check_notify_failure(struct check *check)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200307{
Simon Horman4a741432013-02-23 15:35:38 +0900308 struct server *s = check->server;
Simon Hormane0d1bfb2011-06-21 14:34:58 +0900309
Willy Tarreau7b1d47c2014-05-20 14:55:13 +0200310 /* The agent secondary check should only cause a server to be marked
311 * as down if check->status is HCHK_STATUS_L7STS, which indicates
312 * that the agent returned "fail", "stopped" or "down".
313 * The implication here is that failure to connect to the agent
314 * as a secondary check should not cause the server to be marked
315 * down. */
316 if ((check->state & CHK_ST_AGENT) && check->status != HCHK_STATUS_L7STS)
317 return;
318
Willy Tarreau4eec5472014-05-20 22:32:27 +0200319 if (check->health > 0)
320 return;
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100321
Willy Tarreau4eec5472014-05-20 22:32:27 +0200322 /* We only report a reason for the check if we did not do so previously */
Emeric Brun5a133512017-10-19 14:42:30 +0200323 srv_set_stopped(s, NULL, (!s->track && !(s->proxy->options2 & PR_O2_LOGHCHKS)) ? check : NULL);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200324}
325
Willy Tarreauaf549582014-05-16 17:37:50 +0200326/* Marks the check <check> as valid and tries to set its server up, provided
Willy Tarreau3e048382014-05-21 10:30:54 +0200327 * it isn't in maintenance, it is not tracking a down server and other checks
328 * comply. The rule is simple : by default, a server is up, unless any of the
329 * following conditions is true :
330 * - health check failed (check->health < rise)
331 * - agent check failed (agent->health < rise)
332 * - the server tracks a down server (track && track->state == STOPPED)
333 * Note that if the server has a slowstart, it will switch to STARTING instead
334 * of RUNNING. Also, only the health checks support the nolb mode, so the
335 * agent's success may not take the server out of this mode.
Willy Tarreauaf549582014-05-16 17:37:50 +0200336 */
Willy Tarreau3e048382014-05-21 10:30:54 +0200337static void check_notify_success(struct check *check)
Willy Tarreauaf549582014-05-16 17:37:50 +0200338{
Simon Horman4a741432013-02-23 15:35:38 +0900339 struct server *s = check->server;
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100340
Emeric Brun52a91d32017-08-31 14:41:55 +0200341 if (s->next_admin & SRV_ADMF_MAINT)
Willy Tarreauaf549582014-05-16 17:37:50 +0200342 return;
Cyril Bontécd19e512010-01-31 22:34:03 +0100343
Emeric Brun52a91d32017-08-31 14:41:55 +0200344 if (s->track && s->track->next_state == SRV_ST_STOPPED)
Willy Tarreauaf549582014-05-16 17:37:50 +0200345 return;
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100346
Willy Tarreau3e048382014-05-21 10:30:54 +0200347 if ((s->check.state & CHK_ST_ENABLED) && (s->check.health < s->check.rise))
348 return;
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100349
Willy Tarreau3e048382014-05-21 10:30:54 +0200350 if ((s->agent.state & CHK_ST_ENABLED) && (s->agent.health < s->agent.rise))
351 return;
Willy Tarreauaf549582014-05-16 17:37:50 +0200352
Emeric Brun52a91d32017-08-31 14:41:55 +0200353 if ((check->state & CHK_ST_AGENT) && s->next_state == SRV_ST_STOPPING)
Willy Tarreau3e048382014-05-21 10:30:54 +0200354 return;
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100355
Emeric Brun5a133512017-10-19 14:42:30 +0200356 srv_set_running(s, NULL, (!s->track && !(s->proxy->options2 & PR_O2_LOGHCHKS)) ? check : NULL);
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100357}
358
Willy Tarreaudb58b792014-05-21 13:57:23 +0200359/* Marks the check <check> as valid and tries to set its server into stopping mode
360 * if it was running or starting, and provided it isn't in maintenance and other
361 * checks comply. The conditions for the server to be marked in stopping mode are
362 * the same as for it to be turned up. Also, only the health checks support the
363 * nolb mode.
Willy Tarreauaf549582014-05-16 17:37:50 +0200364 */
Willy Tarreaudb58b792014-05-21 13:57:23 +0200365static void check_notify_stopping(struct check *check)
Willy Tarreauaf549582014-05-16 17:37:50 +0200366{
Simon Horman4a741432013-02-23 15:35:38 +0900367 struct server *s = check->server;
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100368
Emeric Brun52a91d32017-08-31 14:41:55 +0200369 if (s->next_admin & SRV_ADMF_MAINT)
Willy Tarreauaf549582014-05-16 17:37:50 +0200370 return;
371
Willy Tarreaudb58b792014-05-21 13:57:23 +0200372 if (check->state & CHK_ST_AGENT)
373 return;
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100374
Emeric Brun52a91d32017-08-31 14:41:55 +0200375 if (s->track && s->track->next_state == SRV_ST_STOPPED)
Willy Tarreaudb58b792014-05-21 13:57:23 +0200376 return;
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100377
Willy Tarreaudb58b792014-05-21 13:57:23 +0200378 if ((s->check.state & CHK_ST_ENABLED) && (s->check.health < s->check.rise))
379 return;
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100380
Willy Tarreaudb58b792014-05-21 13:57:23 +0200381 if ((s->agent.state & CHK_ST_ENABLED) && (s->agent.health < s->agent.rise))
382 return;
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100383
Willy Tarreaub26881a2017-12-23 11:16:49 +0100384 srv_set_stopping(s, NULL, (!s->track && !(s->proxy->options2 & PR_O2_LOGHCHKS)) ? check : NULL);
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100385}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200386
Willy Tarreau9fe7aae2013-12-31 23:47:37 +0100387/* note: use health_adjust() only, which first checks that the observe mode is
388 * enabled.
389 */
390void __health_adjust(struct server *s, short status)
Willy Tarreau19d14ef2012-10-29 16:51:55 +0100391{
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100392 int failed;
393 int expire;
394
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100395 if (s->observe >= HANA_OBS_SIZE)
396 return;
397
Willy Tarreaubb956662013-01-24 00:37:39 +0100398 if (status >= HANA_STATUS_SIZE || !analyze_statuses[status].desc)
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100399 return;
400
401 switch (analyze_statuses[status].lr[s->observe - 1]) {
402 case 1:
403 failed = 1;
404 break;
405
406 case 2:
407 failed = 0;
408 break;
409
410 default:
411 return;
412 }
413
414 if (!failed) {
415 /* good: clear consecutive_errors */
416 s->consecutive_errors = 0;
417 return;
418 }
419
Olivier Houchard7059c552019-03-08 18:49:32 +0100420 _HA_ATOMIC_ADD(&s->consecutive_errors, 1);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100421
422 if (s->consecutive_errors < s->consecutive_errors_limit)
423 return;
424
Willy Tarreau19d14ef2012-10-29 16:51:55 +0100425 chunk_printf(&trash, "Detected %d consecutive errors, last one was: %s",
426 s->consecutive_errors, get_analyze_status(status));
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100427
428 switch (s->onerror) {
429 case HANA_ONERR_FASTINTER:
430 /* force fastinter - nothing to do here as all modes force it */
431 break;
432
433 case HANA_ONERR_SUDDTH:
434 /* simulate a pre-fatal failed health check */
Simon Horman58c32972013-11-25 10:46:38 +0900435 if (s->check.health > s->check.rise)
436 s->check.health = s->check.rise + 1;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100437
438 /* no break - fall through */
439
440 case HANA_ONERR_FAILCHK:
441 /* simulate a failed health check */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200442 set_server_check_status(&s->check, HCHK_STATUS_HANA,
443 trash.area);
Willy Tarreau4eec5472014-05-20 22:32:27 +0200444 check_notify_failure(&s->check);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100445 break;
446
447 case HANA_ONERR_MARKDWN:
448 /* mark server down */
Simon Horman58c32972013-11-25 10:46:38 +0900449 s->check.health = s->check.rise;
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200450 set_server_check_status(&s->check, HCHK_STATUS_HANA,
451 trash.area);
Willy Tarreau4eec5472014-05-20 22:32:27 +0200452 check_notify_failure(&s->check);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100453 break;
454
455 default:
456 /* write a warning? */
457 break;
458 }
459
460 s->consecutive_errors = 0;
Olivier Houchard7059c552019-03-08 18:49:32 +0100461 _HA_ATOMIC_ADD(&s->counters.failed_hana, 1);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100462
Simon Horman66183002013-02-23 10:16:43 +0900463 if (s->check.fastinter) {
464 expire = tick_add(now_ms, MS_TO_TICKS(s->check.fastinter));
Sergiy Prykhodko1d57e502013-09-21 12:05:00 +0300465 if (s->check.task->expire > expire) {
Willy Tarreau5b3a2022012-09-28 15:01:02 +0200466 s->check.task->expire = expire;
Sergiy Prykhodko1d57e502013-09-21 12:05:00 +0300467 /* requeue check task with new expire */
468 task_queue(s->check.task);
469 }
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100470 }
471}
472
Willy Tarreaua1dab552014-04-14 15:04:54 +0200473static int httpchk_build_status_header(struct server *s, char *buffer, int size)
Willy Tarreauef781042010-01-27 11:53:01 +0100474{
475 int sv_state;
476 int ratio;
477 int hlen = 0;
Joseph Lynch514061c2015-01-15 17:52:59 -0800478 char addr[46];
479 char port[6];
Willy Tarreauef781042010-01-27 11:53:01 +0100480 const char *srv_hlt_st[7] = { "DOWN", "DOWN %d/%d",
481 "UP %d/%d", "UP",
482 "NOLB %d/%d", "NOLB",
483 "no check" };
484
485 memcpy(buffer + hlen, "X-Haproxy-Server-State: ", 24);
486 hlen += 24;
487
Willy Tarreauff5ae352013-12-11 20:36:34 +0100488 if (!(s->check.state & CHK_ST_ENABLED))
489 sv_state = 6;
Emeric Brun52a91d32017-08-31 14:41:55 +0200490 else if (s->cur_state != SRV_ST_STOPPED) {
Simon Horman58c32972013-11-25 10:46:38 +0900491 if (s->check.health == s->check.rise + s->check.fall - 1)
Willy Tarreauef781042010-01-27 11:53:01 +0100492 sv_state = 3; /* UP */
493 else
494 sv_state = 2; /* going down */
495
Emeric Brun52a91d32017-08-31 14:41:55 +0200496 if (s->cur_state == SRV_ST_STOPPING)
Willy Tarreauef781042010-01-27 11:53:01 +0100497 sv_state += 2;
498 } else {
Simon Horman125d0992013-02-24 17:23:38 +0900499 if (s->check.health)
Willy Tarreauef781042010-01-27 11:53:01 +0100500 sv_state = 1; /* going up */
501 else
502 sv_state = 0; /* DOWN */
503 }
504
Willy Tarreaua1dab552014-04-14 15:04:54 +0200505 hlen += snprintf(buffer + hlen, size - hlen,
Willy Tarreauef781042010-01-27 11:53:01 +0100506 srv_hlt_st[sv_state],
Emeric Brun52a91d32017-08-31 14:41:55 +0200507 (s->cur_state != SRV_ST_STOPPED) ? (s->check.health - s->check.rise + 1) : (s->check.health),
508 (s->cur_state != SRV_ST_STOPPED) ? (s->check.fall) : (s->check.rise));
Willy Tarreauef781042010-01-27 11:53:01 +0100509
Joseph Lynch514061c2015-01-15 17:52:59 -0800510 addr_to_str(&s->addr, addr, sizeof(addr));
Willy Tarreau04276f32017-01-06 17:41:29 +0100511 if (s->addr.ss_family == AF_INET || s->addr.ss_family == AF_INET6)
512 snprintf(port, sizeof(port), "%u", s->svc_port);
513 else
514 *port = 0;
Joseph Lynch514061c2015-01-15 17:52:59 -0800515
516 hlen += snprintf(buffer + hlen, size - hlen, "; address=%s; port=%s; name=%s/%s; node=%s; weight=%d/%d; scur=%d/%d; qcur=%d",
517 addr, port, s->proxy->id, s->id,
Willy Tarreauef781042010-01-27 11:53:01 +0100518 global.node,
Emeric Brun52a91d32017-08-31 14:41:55 +0200519 (s->cur_eweight * s->proxy->lbprm.wmult + s->proxy->lbprm.wdiv - 1) / s->proxy->lbprm.wdiv,
Willy Tarreauef781042010-01-27 11:53:01 +0100520 (s->proxy->lbprm.tot_weight * s->proxy->lbprm.wmult + s->proxy->lbprm.wdiv - 1) / s->proxy->lbprm.wdiv,
521 s->cur_sess, s->proxy->beconn - s->proxy->nbpend,
522 s->nbpend);
523
Emeric Brun52a91d32017-08-31 14:41:55 +0200524 if ((s->cur_state == SRV_ST_STARTING) &&
Willy Tarreauef781042010-01-27 11:53:01 +0100525 now.tv_sec < s->last_change + s->slowstart &&
526 now.tv_sec >= s->last_change) {
527 ratio = MAX(1, 100 * (now.tv_sec - s->last_change) / s->slowstart);
Willy Tarreaua1dab552014-04-14 15:04:54 +0200528 hlen += snprintf(buffer + hlen, size - hlen, "; throttle=%d%%", ratio);
Willy Tarreauef781042010-01-27 11:53:01 +0100529 }
530
531 buffer[hlen++] = '\r';
532 buffer[hlen++] = '\n';
533
534 return hlen;
535}
536
Willy Tarreau20a18342013-12-05 00:31:46 +0100537/* Check the connection. If an error has already been reported or the socket is
538 * closed, keep errno intact as it is supposed to contain the valid error code.
539 * If no error is reported, check the socket's error queue using getsockopt().
540 * Warning, this must be done only once when returning from poll, and never
541 * after an I/O error was attempted, otherwise the error queue might contain
542 * inconsistent errors. If an error is detected, the CO_FL_ERROR is set on the
543 * socket. Returns non-zero if an error was reported, zero if everything is
544 * clean (including a properly closed socket).
545 */
546static int retrieve_errno_from_socket(struct connection *conn)
547{
548 int skerr;
549 socklen_t lskerr = sizeof(skerr);
550
551 if (conn->flags & CO_FL_ERROR && ((errno && errno != EAGAIN) || !conn->ctrl))
552 return 1;
553
Willy Tarreau3c728722014-01-23 13:50:42 +0100554 if (!conn_ctrl_ready(conn))
Willy Tarreau20a18342013-12-05 00:31:46 +0100555 return 0;
556
Willy Tarreau585744b2017-08-24 14:31:19 +0200557 if (getsockopt(conn->handle.fd, SOL_SOCKET, SO_ERROR, &skerr, &lskerr) == 0)
Willy Tarreau20a18342013-12-05 00:31:46 +0100558 errno = skerr;
559
560 if (errno == EAGAIN)
561 errno = 0;
562
563 if (!errno) {
564 /* we could not retrieve an error, that does not mean there is
565 * none. Just don't change anything and only report the prior
566 * error if any.
567 */
568 if (conn->flags & CO_FL_ERROR)
569 return 1;
570 else
571 return 0;
572 }
573
574 conn->flags |= CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_SOCK_RD_SH;
575 return 1;
576}
577
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100578/* Try to collect as much information as possible on the connection status,
579 * and adjust the server status accordingly. It may make use of <errno_bck>
580 * if non-null when the caller is absolutely certain of its validity (eg:
581 * checked just after a syscall). If the caller doesn't have a valid errno,
582 * it can pass zero, and retrieve_errno_from_socket() will be called to try
583 * to extract errno from the socket. If no error is reported, it will consider
584 * the <expired> flag. This is intended to be used when a connection error was
585 * reported in conn->flags or when a timeout was reported in <expired>. The
586 * function takes care of not updating a server status which was already set.
587 * All situations where at least one of <expired> or CO_FL_ERROR are set
588 * produce a status.
589 */
Willy Tarreaub5259bf2017-10-04 14:47:29 +0200590static void chk_report_conn_err(struct check *check, int errno_bck, int expired)
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100591{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200592 struct conn_stream *cs = check->cs;
593 struct connection *conn = cs_conn(cs);
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100594 const char *err_msg;
Willy Tarreau83061a82018-07-13 11:56:34 +0200595 struct buffer *chk;
Willy Tarreau213c6782014-10-02 14:51:02 +0200596 int step;
Baptiste Assmann22b09d22015-05-01 08:03:04 +0200597 char *comment;
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100598
Willy Tarreau6aaa1b82013-12-11 17:09:34 +0100599 if (check->result != CHK_RES_UNKNOWN)
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100600 return;
601
602 errno = errno_bck;
Willy Tarreau00149122017-10-04 18:05:01 +0200603 if (conn && (!errno || errno == EAGAIN))
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100604 retrieve_errno_from_socket(conn);
605
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200606 if (conn && !(conn->flags & CO_FL_ERROR) &&
607 !(cs->flags & CS_FL_ERROR) && !expired)
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100608 return;
609
610 /* we'll try to build a meaningful error message depending on the
611 * context of the error possibly present in conn->err_code, and the
612 * socket error possibly collected above. This is useful to know the
613 * exact step of the L6 layer (eg: SSL handshake).
614 */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +0200615 chk = get_trash_chunk();
616
617 if (check->type == PR_O2_TCPCHK_CHK) {
Simon Hormane16c1b32015-01-30 11:22:57 +0900618 step = tcpcheck_get_step_id(check);
Willy Tarreau213c6782014-10-02 14:51:02 +0200619 if (!step)
620 chunk_printf(chk, " at initial connection step of tcp-check");
621 else {
622 chunk_printf(chk, " at step %d of tcp-check", step);
623 /* we were looking for a string */
624 if (check->last_started_step && check->last_started_step->action == TCPCHK_ACT_CONNECT) {
625 if (check->last_started_step->port)
626 chunk_appendf(chk, " (connect port %d)" ,check->last_started_step->port);
627 else
628 chunk_appendf(chk, " (connect)");
629 }
630 else if (check->last_started_step && check->last_started_step->action == TCPCHK_ACT_EXPECT) {
631 if (check->last_started_step->string)
Baptiste Assmann96a5c9b2015-05-01 08:09:29 +0200632 chunk_appendf(chk, " (expect string '%s')", check->last_started_step->string);
Willy Tarreau213c6782014-10-02 14:51:02 +0200633 else if (check->last_started_step->expect_regex)
634 chunk_appendf(chk, " (expect regex)");
635 }
636 else if (check->last_started_step && check->last_started_step->action == TCPCHK_ACT_SEND) {
637 chunk_appendf(chk, " (send)");
638 }
Baptiste Assmann22b09d22015-05-01 08:03:04 +0200639
640 comment = tcpcheck_get_step_comment(check, step);
641 if (comment)
642 chunk_appendf(chk, " comment: '%s'", comment);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +0200643 }
644 }
645
Willy Tarreau00149122017-10-04 18:05:01 +0200646 if (conn && conn->err_code) {
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100647 if (errno && errno != EAGAIN)
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200648 chunk_printf(&trash, "%s (%s)%s", conn_err_code_str(conn), strerror(errno),
649 chk->area);
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100650 else
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200651 chunk_printf(&trash, "%s%s", conn_err_code_str(conn),
652 chk->area);
653 err_msg = trash.area;
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100654 }
655 else {
656 if (errno && errno != EAGAIN) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200657 chunk_printf(&trash, "%s%s", strerror(errno),
658 chk->area);
659 err_msg = trash.area;
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100660 }
661 else {
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200662 err_msg = chk->area;
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100663 }
664 }
665
Willy Tarreau00149122017-10-04 18:05:01 +0200666 if (check->state & CHK_ST_PORT_MISS) {
Baptiste Assmann95db2bc2016-06-13 14:15:41 +0200667 /* NOTE: this is reported after <fall> tries */
668 chunk_printf(chk, "No port available for the TCP connection");
669 set_server_check_status(check, HCHK_STATUS_SOCKERR, err_msg);
670 }
671
Willy Tarreau00149122017-10-04 18:05:01 +0200672 if (!conn) {
673 /* connection allocation error before the connection was established */
674 set_server_check_status(check, HCHK_STATUS_SOCKERR, err_msg);
675 }
676 else if ((conn->flags & (CO_FL_CONNECTED|CO_FL_WAIT_L4_CONN)) == CO_FL_WAIT_L4_CONN) {
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100677 /* L4 not established (yet) */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200678 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100679 set_server_check_status(check, HCHK_STATUS_L4CON, err_msg);
680 else if (expired)
681 set_server_check_status(check, HCHK_STATUS_L4TOUT, err_msg);
Baptiste Assmanna68ca962015-04-14 01:15:08 +0200682
683 /*
684 * might be due to a server IP change.
685 * Let's trigger a DNS resolution if none are currently running.
686 */
Olivier Houchard0923fa42019-01-11 18:43:04 +0100687 if (check->server)
688 dns_trigger_resolution(check->server->dns_requester);
Baptiste Assmanna68ca962015-04-14 01:15:08 +0200689
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100690 }
691 else if ((conn->flags & (CO_FL_CONNECTED|CO_FL_WAIT_L6_CONN)) == CO_FL_WAIT_L6_CONN) {
692 /* L6 not established (yet) */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200693 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100694 set_server_check_status(check, HCHK_STATUS_L6RSP, err_msg);
695 else if (expired)
696 set_server_check_status(check, HCHK_STATUS_L6TOUT, err_msg);
697 }
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200698 else if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) {
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100699 /* I/O error after connection was established and before we could diagnose */
700 set_server_check_status(check, HCHK_STATUS_SOCKERR, err_msg);
701 }
702 else if (expired) {
703 /* connection established but expired check */
704 if (check->type == PR_O2_SSL3_CHK)
705 set_server_check_status(check, HCHK_STATUS_L6TOUT, err_msg);
706 else /* HTTP, SMTP, ... */
707 set_server_check_status(check, HCHK_STATUS_L7TOUT, err_msg);
708 }
709
710 return;
711}
712
Olivier Houchard5c110b92018-08-14 17:04:58 +0200713/* This function checks if any I/O is wanted, and if so, attempts to do so */
714static struct task *event_srv_chk_io(struct task *t, void *ctx, unsigned short state)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200715{
Olivier Houchard26e1a8f2018-09-12 15:15:12 +0200716 struct check *check = ctx;
717 struct conn_stream *cs = check->cs;
Olivier Houchard0923fa42019-01-11 18:43:04 +0100718 struct email_alertq *q = container_of(check, typeof(*q), check);
Olivier Houchard4501c3e2018-08-28 19:36:18 +0200719
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100720 if (!(check->wait_list.events & SUB_RETRY_SEND))
Olivier Houchard4501c3e2018-08-28 19:36:18 +0200721 wake_srv_chk(cs);
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100722 if (!(check->wait_list.events & SUB_RETRY_RECV)) {
Olivier Houchard0923fa42019-01-11 18:43:04 +0100723 if (check->server)
724 HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock);
725 else
726 HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock);
Olivier Houchardaf4021e2018-08-09 13:06:55 +0200727 __event_srv_chk_r(cs);
Olivier Houchard0923fa42019-01-11 18:43:04 +0100728 if (check->server)
729 HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock);
730 else
731 HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock);
Olivier Houchardaf4021e2018-08-09 13:06:55 +0200732 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200733 return NULL;
734}
735
736/* same as above but protected by the server lock.
Willy Tarreau62ac84f2017-11-05 10:11:13 +0100737 *
738 * Please do NOT place any return statement in this function and only leave
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200739 * via the out label. NOTE THAT THIS FUNCTION DOESN'T LOCK, YOU PROBABLY WANT
740 * TO USE event_srv_chk_w() instead.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200741 */
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200742static void __event_srv_chk_w(struct conn_stream *cs)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200743{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200744 struct connection *conn = cs->conn;
745 struct check *check = cs->data;
Simon Horman4a741432013-02-23 15:35:38 +0900746 struct server *s = check->server;
Simon Horman4a741432013-02-23 15:35:38 +0900747 struct task *t = check->task;
Willy Tarreaufb56aab2012-09-28 14:40:02 +0200748
Willy Tarreau6aaa1b82013-12-11 17:09:34 +0100749 if (unlikely(check->result == CHK_RES_FAILED))
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100750 goto out_wakeup;
751
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200752 if (conn->flags & CO_FL_HANDSHAKE) {
Olivier Houchard06f68112019-03-28 17:32:42 +0100753 if (!(conn->flags & CO_FL_ERROR))
754 cs->conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200755 goto out;
756 }
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100757
Willy Tarreau20a18342013-12-05 00:31:46 +0100758 if (retrieve_errno_from_socket(conn)) {
Willy Tarreaub5259bf2017-10-04 14:47:29 +0200759 chk_report_conn_err(check, errno, 0);
Willy Tarreau20a18342013-12-05 00:31:46 +0100760 goto out_wakeup;
761 }
Krzysztof Piotr Oledzki6492db52010-01-02 22:03:01 +0100762
Willy Tarreaubbae3f02017-08-30 09:59:52 +0200763 if (conn->flags & CO_FL_SOCK_WR_SH) {
Willy Tarreau20a18342013-12-05 00:31:46 +0100764 /* if the output is closed, we can't do anything */
765 conn->flags |= CO_FL_ERROR;
Willy Tarreaub5259bf2017-10-04 14:47:29 +0200766 chk_report_conn_err(check, 0, 0);
Willy Tarreau20a18342013-12-05 00:31:46 +0100767 goto out_wakeup;
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200768 }
Willy Tarreau6996e152007-04-30 14:37:43 +0200769
Willy Tarreau06559ac2013-12-05 01:53:08 +0100770 /* here, we know that the connection is established. That's enough for
771 * a pure TCP check.
772 */
773 if (!check->type)
774 goto out_wakeup;
775
Willy Tarreauc09572f2017-10-04 11:58:22 +0200776 /* wake() will take care of calling tcpcheck_main() */
Willy Tarreau62ac84f2017-11-05 10:11:13 +0100777 if (check->type == PR_O2_TCPCHK_CHK)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200778 goto out;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +0200779
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200780 if (b_data(&check->bo)) {
Olivier Houcharded0f2072018-08-16 15:41:52 +0200781 cs->conn->mux->snd_buf(cs, &check->bo, b_data(&check->bo), 0);
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200782 b_realign_if_empty(&check->bo);
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200783 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) {
Willy Tarreaub5259bf2017-10-04 14:47:29 +0200784 chk_report_conn_err(check, errno, 0);
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100785 goto out_wakeup;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200786 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200787 if (b_data(&check->bo)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100788 conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200789 goto out;
790 }
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100791 }
Willy Tarreau6996e152007-04-30 14:37:43 +0200792
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100793 /* full request sent, we allow up to <timeout.check> if nonzero for a response */
794 if (s->proxy->timeout.check) {
795 t->expire = tick_add_ifset(now_ms, s->proxy->timeout.check);
796 task_queue(t);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200797 }
Olivier Houchard53216e72018-10-10 15:46:36 +0200798 goto out;
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100799
Willy Tarreau83749182007-04-15 20:56:27 +0200800 out_wakeup:
Willy Tarreaufdccded2008-08-29 18:19:04 +0200801 task_wakeup(t, TASK_WOKEN_IO);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200802 out:
803 return;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200804}
805
Willy Tarreaubaaee002006-06-26 02:48:02 +0200806/*
Willy Tarreauf3c69202006-07-09 16:42:34 +0200807 * This function is used only for server health-checks. It handles the server's
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +0200808 * reply to an HTTP request, SSL HELLO or MySQL client Auth. It calls
Simon Horman4a741432013-02-23 15:35:38 +0900809 * set_server_check_status() to update check->status, check->duration
810 * and check->result.
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200811
812 * The set_server_check_status function is called with HCHK_STATUS_L7OKD if
813 * an HTTP server replies HTTP 2xx or 3xx (valid responses), if an SMTP server
814 * returns 2xx, HCHK_STATUS_L6OK if an SSL server returns at least 5 bytes in
815 * response to an SSL HELLO (the principle is that this is enough to
816 * distinguish between an SSL server and a pure TCP relay). All other cases will
817 * call it with a proper error status like HCHK_STATUS_L7STS, HCHK_STATUS_L6RSP,
818 * etc.
Willy Tarreau62ac84f2017-11-05 10:11:13 +0100819 *
820 * Please do NOT place any return statement in this function and only leave
Olivier Houchardaf4021e2018-08-09 13:06:55 +0200821 * via the out label.
822 *
823 * This must be called with the server lock held.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200824 */
Olivier Houchardaf4021e2018-08-09 13:06:55 +0200825static void __event_srv_chk_r(struct conn_stream *cs)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200826{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200827 struct connection *conn = cs->conn;
828 struct check *check = cs->data;
Simon Horman4a741432013-02-23 15:35:38 +0900829 struct server *s = check->server;
830 struct task *t = check->task;
Krzysztof Piotr Oledzkif7089f52009-10-10 21:06:49 +0200831 char *desc;
Willy Tarreau03938182010-03-17 21:52:07 +0100832 int done;
Gabor Lekenyb4c81e42010-09-29 18:17:05 +0200833 unsigned short msglen;
Willy Tarreau83749182007-04-15 20:56:27 +0200834
Willy Tarreau6aaa1b82013-12-11 17:09:34 +0100835 if (unlikely(check->result == CHK_RES_FAILED))
Willy Tarreau83749182007-04-15 20:56:27 +0200836 goto out_wakeup;
Willy Tarreau83749182007-04-15 20:56:27 +0200837
Olivier Houchardaf4021e2018-08-09 13:06:55 +0200838 if (conn->flags & CO_FL_HANDSHAKE) {
Olivier Houchard06f68112019-03-28 17:32:42 +0100839 if (!(conn->flags & CO_FL_ERROR))
840 cs->conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
Olivier Houchardaf4021e2018-08-09 13:06:55 +0200841 goto out;
842 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +0200843
Willy Tarreauc09572f2017-10-04 11:58:22 +0200844 /* wake() will take care of calling tcpcheck_main() */
Willy Tarreau62ac84f2017-11-05 10:11:13 +0100845 if (check->type == PR_O2_TCPCHK_CHK)
Olivier Houchardaf4021e2018-08-09 13:06:55 +0200846 goto out;
Willy Tarreaufb56aab2012-09-28 14:40:02 +0200847
Willy Tarreau83749182007-04-15 20:56:27 +0200848 /* Warning! Linux returns EAGAIN on SO_ERROR if data are still available
849 * but the connection was closed on the remote end. Fortunately, recv still
850 * works correctly and we don't need to do the getsockopt() on linux.
851 */
Nick Chalk57b1bf72010-03-16 15:50:46 +0000852
853 /* Set buffer to point to the end of the data already read, and check
854 * that there is free space remaining. If the buffer is full, proceed
855 * with running the checks without attempting another socket read.
856 */
Nick Chalk57b1bf72010-03-16 15:50:46 +0000857
Willy Tarreau03938182010-03-17 21:52:07 +0100858 done = 0;
Nick Chalk57b1bf72010-03-16 15:50:46 +0000859
Olivier Houchard511efea2018-08-16 15:30:32 +0200860 cs->conn->mux->rcv_buf(cs, &check->bi, b_size(&check->bi), 0);
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200861 if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) {
Willy Tarreau03938182010-03-17 21:52:07 +0100862 done = 1;
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200863 if ((conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) && !b_data(&check->bi)) {
Willy Tarreauf1503172012-09-28 19:39:36 +0200864 /* Report network errors only if we got no other data. Otherwise
865 * we'll let the upper layers decide whether the response is OK
866 * or not. It is very common that an RST sent by the server is
867 * reported as an error just after the last data chunk.
868 */
Willy Tarreaub5259bf2017-10-04 14:47:29 +0200869 chk_report_conn_err(check, errno, 0);
Willy Tarreauc1a07962010-03-16 20:55:43 +0100870 goto out_wakeup;
871 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200872 }
873
Willy Tarreau25e2ab52013-12-04 11:17:05 +0100874
Willy Tarreau03938182010-03-17 21:52:07 +0100875 /* Intermediate or complete response received.
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200876 * Terminate string in b_head(&check->bi) buffer.
Willy Tarreau03938182010-03-17 21:52:07 +0100877 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200878 if (b_data(&check->bi) < b_size(&check->bi))
879 b_head(&check->bi)[b_data(&check->bi)] = '\0';
Willy Tarreau03938182010-03-17 21:52:07 +0100880 else {
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200881 b_head(&check->bi)[b_data(&check->bi) - 1] = '\0';
Willy Tarreau03938182010-03-17 21:52:07 +0100882 done = 1; /* buffer full, don't wait for more data */
883 }
Krzysztof Piotr Oledzkif7089f52009-10-10 21:06:49 +0200884
Nick Chalk57b1bf72010-03-16 15:50:46 +0000885 /* Run the checks... */
Simon Horman4a741432013-02-23 15:35:38 +0900886 switch (check->type) {
Willy Tarreau1620ec32011-08-06 17:05:02 +0200887 case PR_O2_HTTP_CHK:
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200888 if (!done && b_data(&check->bi) < strlen("HTTP/1.0 000\r"))
Willy Tarreau03938182010-03-17 21:52:07 +0100889 goto wait_more_data;
890
Willy Tarreauc7dd71a2007-11-30 08:33:21 +0100891 /* Check if the server speaks HTTP 1.X */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200892 if ((b_data(&check->bi) < strlen("HTTP/1.0 000\r")) ||
893 (memcmp(b_head(&check->bi), "HTTP/1.", 7) != 0 ||
894 (*(b_head(&check->bi) + 12) != ' ' && *(b_head(&check->bi) + 12) != '\r')) ||
895 !isdigit((unsigned char) *(b_head(&check->bi) + 9)) || !isdigit((unsigned char) *(b_head(&check->bi) + 10)) ||
896 !isdigit((unsigned char) *(b_head(&check->bi) + 11))) {
897 cut_crlf(b_head(&check->bi));
898 set_server_check_status(check, HCHK_STATUS_L7RSP, b_head(&check->bi));
Krzysztof Piotr Oledzkif7089f52009-10-10 21:06:49 +0200899
Willy Tarreauc7dd71a2007-11-30 08:33:21 +0100900 goto out_wakeup;
901 }
902
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200903 check->code = str2uic(b_head(&check->bi) + 9);
904 desc = ltrim(b_head(&check->bi) + 12, ' ');
Christopher Fauletc2a89a62017-10-23 15:54:24 +0200905
Willy Tarreaubd741542010-03-16 18:46:54 +0100906 if ((s->proxy->options & PR_O_DISABLE404) &&
Emeric Brun52a91d32017-08-31 14:41:55 +0200907 (s->next_state != SRV_ST_STOPPED) && (check->code == 404)) {
Nick Chalk57b1bf72010-03-16 15:50:46 +0000908 /* 404 may be accepted as "stopping" only if the server was up */
909 cut_crlf(desc);
Simon Horman4a741432013-02-23 15:35:38 +0900910 set_server_check_status(check, HCHK_STATUS_L7OKCD, desc);
Nick Chalk57b1bf72010-03-16 15:50:46 +0000911 }
Willy Tarreaubd741542010-03-16 18:46:54 +0100912 else if (s->proxy->options2 & PR_O2_EXP_TYPE) {
913 /* Run content verification check... We know we have at least 13 chars */
914 if (!httpchk_expect(s, done))
915 goto wait_more_data;
916 }
917 /* check the reply : HTTP/1.X 2xx and 3xx are OK */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200918 else if (*(b_head(&check->bi) + 9) == '2' || *(b_head(&check->bi) + 9) == '3') {
Willy Tarreaubd741542010-03-16 18:46:54 +0100919 cut_crlf(desc);
Simon Horman4a741432013-02-23 15:35:38 +0900920 set_server_check_status(check, HCHK_STATUS_L7OKD, desc);
Willy Tarreaubd741542010-03-16 18:46:54 +0100921 }
Nick Chalk57b1bf72010-03-16 15:50:46 +0000922 else {
923 cut_crlf(desc);
Simon Horman4a741432013-02-23 15:35:38 +0900924 set_server_check_status(check, HCHK_STATUS_L7STS, desc);
Nick Chalk57b1bf72010-03-16 15:50:46 +0000925 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200926 break;
927
928 case PR_O2_SSL3_CHK:
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200929 if (!done && b_data(&check->bi) < 5)
Willy Tarreau03938182010-03-17 21:52:07 +0100930 goto wait_more_data;
931
Willy Tarreauc7dd71a2007-11-30 08:33:21 +0100932 /* Check for SSLv3 alert or handshake */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200933 if ((b_data(&check->bi) >= 5) && (*b_head(&check->bi) == 0x15 || *b_head(&check->bi) == 0x16))
Simon Horman4a741432013-02-23 15:35:38 +0900934 set_server_check_status(check, HCHK_STATUS_L6OK, NULL);
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200935 else
Simon Horman4a741432013-02-23 15:35:38 +0900936 set_server_check_status(check, HCHK_STATUS_L6RSP, NULL);
Willy Tarreau1620ec32011-08-06 17:05:02 +0200937 break;
938
939 case PR_O2_SMTP_CHK:
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200940 if (!done && b_data(&check->bi) < strlen("000\r"))
Willy Tarreau03938182010-03-17 21:52:07 +0100941 goto wait_more_data;
942
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200943 /* Check if the server speaks SMTP */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200944 if ((b_data(&check->bi) < strlen("000\r")) ||
945 (*(b_head(&check->bi) + 3) != ' ' && *(b_head(&check->bi) + 3) != '\r') ||
946 !isdigit((unsigned char) *b_head(&check->bi)) || !isdigit((unsigned char) *(b_head(&check->bi) + 1)) ||
947 !isdigit((unsigned char) *(b_head(&check->bi) + 2))) {
948 cut_crlf(b_head(&check->bi));
949 set_server_check_status(check, HCHK_STATUS_L7RSP, b_head(&check->bi));
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200950 goto out_wakeup;
951 }
952
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200953 check->code = str2uic(b_head(&check->bi));
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +0200954
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200955 desc = ltrim(b_head(&check->bi) + 3, ' ');
Krzysztof Piotr Oledzkif7089f52009-10-10 21:06:49 +0200956 cut_crlf(desc);
957
Willy Tarreauc7dd71a2007-11-30 08:33:21 +0100958 /* Check for SMTP code 2xx (should be 250) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200959 if (*b_head(&check->bi) == '2')
Simon Horman4a741432013-02-23 15:35:38 +0900960 set_server_check_status(check, HCHK_STATUS_L7OKD, desc);
Krzysztof Piotr Oledzki213014e2009-09-27 15:50:02 +0200961 else
Simon Horman4a741432013-02-23 15:35:38 +0900962 set_server_check_status(check, HCHK_STATUS_L7STS, desc);
Willy Tarreau1620ec32011-08-06 17:05:02 +0200963 break;
964
Simon Hormana2b9dad2013-02-12 10:45:54 +0900965 case PR_O2_LB_AGENT_CHK: {
Willy Tarreau81f5d942013-12-09 20:51:51 +0100966 int status = HCHK_STATUS_CHECKED;
967 const char *hs = NULL; /* health status */
968 const char *as = NULL; /* admin status */
969 const char *ps = NULL; /* performance status */
Nenad Merdanovic174dd372016-04-24 23:10:06 +0200970 const char *cs = NULL; /* maxconn */
Willy Tarreau81f5d942013-12-09 20:51:51 +0100971 const char *err = NULL; /* first error to report */
972 const char *wrn = NULL; /* first warning to report */
973 char *cmd, *p;
Simon Hormana2b9dad2013-02-12 10:45:54 +0900974
Willy Tarreau81f5d942013-12-09 20:51:51 +0100975 /* We're getting an agent check response. The agent could
976 * have been disabled in the mean time with a long check
977 * still pending. It is important that we ignore the whole
978 * response.
979 */
980 if (!(check->server->agent.state & CHK_ST_ENABLED))
981 break;
982
983 /* The agent supports strings made of a single line ended by the
984 * first CR ('\r') or LF ('\n'). This line is composed of words
985 * delimited by spaces (' '), tabs ('\t'), or commas (','). The
986 * line may optionally contained a description of a state change
987 * after a sharp ('#'), which is only considered if a health state
988 * is announced.
989 *
990 * Words may be composed of :
991 * - a numeric weight suffixed by the percent character ('%').
992 * - a health status among "up", "down", "stopped", and "fail".
993 * - an admin status among "ready", "drain", "maint".
994 *
995 * These words may appear in any order. If multiple words of the
996 * same category appear, the last one wins.
997 */
998
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200999 p = b_head(&check->bi);
Willy Tarreau9809b782013-12-11 21:40:11 +01001000 while (*p && *p != '\n' && *p != '\r')
1001 p++;
1002
1003 if (!*p) {
1004 if (!done)
1005 goto wait_more_data;
Simon Hormana2b9dad2013-02-12 10:45:54 +09001006
Willy Tarreau9809b782013-12-11 21:40:11 +01001007 /* at least inform the admin that the agent is mis-behaving */
1008 set_server_check_status(check, check->status, "Ignoring incomplete line from agent");
1009 break;
1010 }
Willy Tarreau81f5d942013-12-09 20:51:51 +01001011
Willy Tarreau9809b782013-12-11 21:40:11 +01001012 *p = 0;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001013 cmd = b_head(&check->bi);
Simon Hormana2b9dad2013-02-12 10:45:54 +09001014
Willy Tarreau81f5d942013-12-09 20:51:51 +01001015 while (*cmd) {
1016 /* look for next word */
1017 if (*cmd == ' ' || *cmd == '\t' || *cmd == ',') {
1018 cmd++;
1019 continue;
1020 }
Simon Horman671b6f02013-11-25 10:46:39 +09001021
Willy Tarreau81f5d942013-12-09 20:51:51 +01001022 if (*cmd == '#') {
1023 /* this is the beginning of a health status description,
1024 * skip the sharp and blanks.
1025 */
1026 cmd++;
1027 while (*cmd == '\t' || *cmd == ' ')
1028 cmd++;
Simon Horman671b6f02013-11-25 10:46:39 +09001029 break;
Simon Hormana2b9dad2013-02-12 10:45:54 +09001030 }
Willy Tarreau81f5d942013-12-09 20:51:51 +01001031
1032 /* find the end of the word so that we have a null-terminated
1033 * word between <cmd> and <p>.
1034 */
1035 p = cmd + 1;
1036 while (*p && *p != '\t' && *p != ' ' && *p != '\n' && *p != ',')
1037 p++;
1038 if (*p)
1039 *p++ = 0;
1040
1041 /* first, health statuses */
1042 if (strcasecmp(cmd, "up") == 0) {
1043 check->health = check->rise + check->fall - 1;
Simon Hormana2b9dad2013-02-12 10:45:54 +09001044 status = HCHK_STATUS_L7OKD;
Willy Tarreau81f5d942013-12-09 20:51:51 +01001045 hs = cmd;
1046 }
1047 else if (strcasecmp(cmd, "down") == 0) {
1048 check->health = 0;
1049 status = HCHK_STATUS_L7STS;
1050 hs = cmd;
Simon Hormana2b9dad2013-02-12 10:45:54 +09001051 }
Willy Tarreau81f5d942013-12-09 20:51:51 +01001052 else if (strcasecmp(cmd, "stopped") == 0) {
1053 check->health = 0;
1054 status = HCHK_STATUS_L7STS;
1055 hs = cmd;
1056 }
1057 else if (strcasecmp(cmd, "fail") == 0) {
1058 check->health = 0;
1059 status = HCHK_STATUS_L7STS;
1060 hs = cmd;
1061 }
1062 /* admin statuses */
1063 else if (strcasecmp(cmd, "ready") == 0) {
1064 as = cmd;
1065 }
1066 else if (strcasecmp(cmd, "drain") == 0) {
1067 as = cmd;
1068 }
1069 else if (strcasecmp(cmd, "maint") == 0) {
1070 as = cmd;
1071 }
Nenad Merdanovic174dd372016-04-24 23:10:06 +02001072 /* try to parse a weight here and keep the last one */
Willy Tarreau81f5d942013-12-09 20:51:51 +01001073 else if (isdigit((unsigned char)*cmd) && strchr(cmd, '%') != NULL) {
1074 ps = cmd;
1075 }
Nenad Merdanovic174dd372016-04-24 23:10:06 +02001076 /* try to parse a maxconn here */
1077 else if (strncasecmp(cmd, "maxconn:", strlen("maxconn:")) == 0) {
1078 cs = cmd;
1079 }
Willy Tarreau81f5d942013-12-09 20:51:51 +01001080 else {
1081 /* keep a copy of the first error */
1082 if (!err)
1083 err = cmd;
1084 }
1085 /* skip to next word */
1086 cmd = p;
1087 }
1088 /* here, cmd points either to \0 or to the beginning of a
1089 * description. Skip possible leading spaces.
1090 */
1091 while (*cmd == ' ' || *cmd == '\n')
1092 cmd++;
1093
1094 /* First, update the admin status so that we avoid sending other
1095 * possibly useless warnings and can also update the health if
1096 * present after going back up.
1097 */
1098 if (as) {
1099 if (strcasecmp(as, "drain") == 0)
1100 srv_adm_set_drain(check->server);
1101 else if (strcasecmp(as, "maint") == 0)
1102 srv_adm_set_maint(check->server);
1103 else
1104 srv_adm_set_ready(check->server);
Simon Hormana2b9dad2013-02-12 10:45:54 +09001105 }
1106
Willy Tarreau81f5d942013-12-09 20:51:51 +01001107 /* now change weights */
1108 if (ps) {
1109 const char *msg;
1110
1111 msg = server_parse_weight_change_request(s, ps);
1112 if (!wrn || !*wrn)
1113 wrn = msg;
1114 }
1115
Nenad Merdanovic174dd372016-04-24 23:10:06 +02001116 if (cs) {
1117 const char *msg;
1118
1119 cs += strlen("maxconn:");
1120
1121 msg = server_parse_maxconn_change_request(s, cs);
1122 if (!wrn || !*wrn)
1123 wrn = msg;
1124 }
1125
Willy Tarreau81f5d942013-12-09 20:51:51 +01001126 /* and finally health status */
1127 if (hs) {
1128 /* We'll report some of the warnings and errors we have
1129 * here. Down reports are critical, we leave them untouched.
1130 * Lack of report, or report of 'UP' leaves the room for
1131 * ERR first, then WARN.
Simon Hormana2b9dad2013-02-12 10:45:54 +09001132 */
Willy Tarreau81f5d942013-12-09 20:51:51 +01001133 const char *msg = cmd;
Willy Tarreau83061a82018-07-13 11:56:34 +02001134 struct buffer *t;
Willy Tarreau81f5d942013-12-09 20:51:51 +01001135
1136 if (!*msg || status == HCHK_STATUS_L7OKD) {
1137 if (err && *err)
1138 msg = err;
1139 else if (wrn && *wrn)
1140 msg = wrn;
Simon Hormana2b9dad2013-02-12 10:45:54 +09001141 }
Willy Tarreau81f5d942013-12-09 20:51:51 +01001142
1143 t = get_trash_chunk();
1144 chunk_printf(t, "via agent : %s%s%s%s",
1145 hs, *msg ? " (" : "",
1146 msg, *msg ? ")" : "");
1147
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001148 set_server_check_status(check, status, t->area);
Simon Hormana2b9dad2013-02-12 10:45:54 +09001149 }
Willy Tarreau81f5d942013-12-09 20:51:51 +01001150 else if (err && *err) {
1151 /* No status change but we'd like to report something odd.
1152 * Just report the current state and copy the message.
1153 */
1154 chunk_printf(&trash, "agent reports an error : %s", err);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001155 set_server_check_status(check, status/*check->status*/,
1156 trash.area);
Simon Hormana2b9dad2013-02-12 10:45:54 +09001157
Willy Tarreau81f5d942013-12-09 20:51:51 +01001158 }
1159 else if (wrn && *wrn) {
1160 /* No status change but we'd like to report something odd.
1161 * Just report the current state and copy the message.
1162 */
1163 chunk_printf(&trash, "agent warns : %s", wrn);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001164 set_server_check_status(check, status/*check->status*/,
1165 trash.area);
Willy Tarreau81f5d942013-12-09 20:51:51 +01001166 }
1167 else
1168 set_server_check_status(check, status, NULL);
Simon Hormana2b9dad2013-02-12 10:45:54 +09001169 break;
1170 }
1171
Willy Tarreau1620ec32011-08-06 17:05:02 +02001172 case PR_O2_PGSQL_CHK:
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001173 if (!done && b_data(&check->bi) < 9)
Rauf Kuliyev38b41562011-01-04 15:14:13 +01001174 goto wait_more_data;
1175
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001176 if (b_head(&check->bi)[0] == 'R') {
Simon Horman4a741432013-02-23 15:35:38 +09001177 set_server_check_status(check, HCHK_STATUS_L7OKD, "PostgreSQL server is ok");
Rauf Kuliyev38b41562011-01-04 15:14:13 +01001178 }
1179 else {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001180 if ((b_head(&check->bi)[0] == 'E') && (b_head(&check->bi)[5]!=0) && (b_head(&check->bi)[6]!=0))
1181 desc = &b_head(&check->bi)[6];
Rauf Kuliyev38b41562011-01-04 15:14:13 +01001182 else
1183 desc = "PostgreSQL unknown error";
1184
Simon Horman4a741432013-02-23 15:35:38 +09001185 set_server_check_status(check, HCHK_STATUS_L7STS, desc);
Rauf Kuliyev38b41562011-01-04 15:14:13 +01001186 }
Willy Tarreau1620ec32011-08-06 17:05:02 +02001187 break;
1188
1189 case PR_O2_REDIS_CHK:
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001190 if (!done && b_data(&check->bi) < 7)
Hervé COMMOWICKec032d62011-08-05 16:23:48 +02001191 goto wait_more_data;
1192
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001193 if (strcmp(b_head(&check->bi), "+PONG\r\n") == 0) {
Simon Horman4a741432013-02-23 15:35:38 +09001194 set_server_check_status(check, HCHK_STATUS_L7OKD, "Redis server is ok");
Hervé COMMOWICKec032d62011-08-05 16:23:48 +02001195 }
1196 else {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001197 set_server_check_status(check, HCHK_STATUS_L7STS, b_head(&check->bi));
Hervé COMMOWICKec032d62011-08-05 16:23:48 +02001198 }
Willy Tarreau1620ec32011-08-06 17:05:02 +02001199 break;
1200
1201 case PR_O2_MYSQL_CHK:
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001202 if (!done && b_data(&check->bi) < 5)
Willy Tarreau03938182010-03-17 21:52:07 +01001203 goto wait_more_data;
1204
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001205 if (s->proxy->check_len == 0) { // old mode
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001206 if (*(b_head(&check->bi) + 4) != '\xff') {
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001207 /* We set the MySQL Version in description for information purpose
1208 * FIXME : it can be cool to use MySQL Version for other purpose,
1209 * like mark as down old MySQL server.
1210 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001211 if (b_data(&check->bi) > 51) {
1212 desc = ltrim(b_head(&check->bi) + 5, ' ');
Simon Horman4a741432013-02-23 15:35:38 +09001213 set_server_check_status(check, HCHK_STATUS_L7OKD, desc);
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001214 }
1215 else {
1216 if (!done)
1217 goto wait_more_data;
Emeric Brun9f0b4582017-10-23 14:39:51 +02001218
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001219 /* it seems we have a OK packet but without a valid length,
1220 * it must be a protocol error
1221 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001222 set_server_check_status(check, HCHK_STATUS_L7RSP, b_head(&check->bi));
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001223 }
Hervé COMMOWICK698ae002010-01-12 09:25:13 +01001224 }
1225 else {
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001226 /* An error message is attached in the Error packet */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001227 desc = ltrim(b_head(&check->bi) + 7, ' ');
Simon Horman4a741432013-02-23 15:35:38 +09001228 set_server_check_status(check, HCHK_STATUS_L7STS, desc);
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001229 }
1230 } else {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001231 unsigned int first_packet_len = ((unsigned int) *b_head(&check->bi)) +
1232 (((unsigned int) *(b_head(&check->bi) + 1)) << 8) +
1233 (((unsigned int) *(b_head(&check->bi) + 2)) << 16);
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001234
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001235 if (b_data(&check->bi) == first_packet_len + 4) {
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001236 /* MySQL Error packet always begin with field_count = 0xff */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001237 if (*(b_head(&check->bi) + 4) != '\xff') {
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001238 /* We have only one MySQL packet and it is a Handshake Initialization packet
1239 * but we need to have a second packet to know if it is alright
1240 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001241 if (!done && b_data(&check->bi) < first_packet_len + 5)
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001242 goto wait_more_data;
1243 }
1244 else {
1245 /* We have only one packet and it is an Error packet,
1246 * an error message is attached, so we can display it
1247 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001248 desc = &b_head(&check->bi)[7];
Christopher Faulet767a84b2017-11-24 16:50:31 +01001249 //ha_warning("onlyoneERR: %s\n", desc);
Simon Horman4a741432013-02-23 15:35:38 +09001250 set_server_check_status(check, HCHK_STATUS_L7STS, desc);
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001251 }
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001252 } else if (b_data(&check->bi) > first_packet_len + 4) {
1253 unsigned int second_packet_len = ((unsigned int) *(b_head(&check->bi) + first_packet_len + 4)) +
1254 (((unsigned int) *(b_head(&check->bi) + first_packet_len + 5)) << 8) +
1255 (((unsigned int) *(b_head(&check->bi) + first_packet_len + 6)) << 16);
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001256
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001257 if (b_data(&check->bi) == first_packet_len + 4 + second_packet_len + 4 ) {
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001258 /* We have 2 packets and that's good */
1259 /* Check if the second packet is a MySQL Error packet or not */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001260 if (*(b_head(&check->bi) + first_packet_len + 8) != '\xff') {
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001261 /* No error packet */
1262 /* We set the MySQL Version in description for information purpose */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001263 desc = &b_head(&check->bi)[5];
Christopher Faulet767a84b2017-11-24 16:50:31 +01001264 //ha_warning("2packetOK: %s\n", desc);
Simon Horman4a741432013-02-23 15:35:38 +09001265 set_server_check_status(check, HCHK_STATUS_L7OKD, desc);
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001266 }
1267 else {
1268 /* An error message is attached in the Error packet
1269 * so we can display it ! :)
1270 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001271 desc = &b_head(&check->bi)[first_packet_len+11];
Christopher Faulet767a84b2017-11-24 16:50:31 +01001272 //ha_warning("2packetERR: %s\n", desc);
Simon Horman4a741432013-02-23 15:35:38 +09001273 set_server_check_status(check, HCHK_STATUS_L7STS, desc);
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001274 }
1275 }
1276 }
1277 else {
Willy Tarreau03938182010-03-17 21:52:07 +01001278 if (!done)
1279 goto wait_more_data;
Emeric Brun9f0b4582017-10-23 14:39:51 +02001280
Hervé COMMOWICK8776f1b2010-10-18 15:58:36 +02001281 /* it seems we have a Handshake Initialization packet but without a valid length,
Hervé COMMOWICK698ae002010-01-12 09:25:13 +01001282 * it must be a protocol error
1283 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001284 desc = &b_head(&check->bi)[5];
Christopher Faulet767a84b2017-11-24 16:50:31 +01001285 //ha_warning("protoerr: %s\n", desc);
Simon Horman4a741432013-02-23 15:35:38 +09001286 set_server_check_status(check, HCHK_STATUS_L7RSP, desc);
Hervé COMMOWICK698ae002010-01-12 09:25:13 +01001287 }
1288 }
Willy Tarreau1620ec32011-08-06 17:05:02 +02001289 break;
1290
1291 case PR_O2_LDAP_CHK:
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001292 if (!done && b_data(&check->bi) < 14)
Gabor Lekenyb4c81e42010-09-29 18:17:05 +02001293 goto wait_more_data;
1294
1295 /* Check if the server speaks LDAP (ASN.1/BER)
1296 * http://en.wikipedia.org/wiki/Basic_Encoding_Rules
1297 * http://tools.ietf.org/html/rfc4511
1298 */
1299
1300 /* http://tools.ietf.org/html/rfc4511#section-4.1.1
1301 * LDAPMessage: 0x30: SEQUENCE
1302 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001303 if ((b_data(&check->bi) < 14) || (*(b_head(&check->bi)) != '\x30')) {
Simon Horman4a741432013-02-23 15:35:38 +09001304 set_server_check_status(check, HCHK_STATUS_L7RSP, "Not LDAPv3 protocol");
Gabor Lekenyb4c81e42010-09-29 18:17:05 +02001305 }
1306 else {
1307 /* size of LDAPMessage */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001308 msglen = (*(b_head(&check->bi) + 1) & 0x80) ? (*(b_head(&check->bi) + 1) & 0x7f) : 0;
Gabor Lekenyb4c81e42010-09-29 18:17:05 +02001309
1310 /* http://tools.ietf.org/html/rfc4511#section-4.2.2
1311 * messageID: 0x02 0x01 0x01: INTEGER 1
1312 * protocolOp: 0x61: bindResponse
1313 */
1314 if ((msglen > 2) ||
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001315 (memcmp(b_head(&check->bi) + 2 + msglen, "\x02\x01\x01\x61", 4) != 0)) {
Simon Horman4a741432013-02-23 15:35:38 +09001316 set_server_check_status(check, HCHK_STATUS_L7RSP, "Not LDAPv3 protocol");
Gabor Lekenyb4c81e42010-09-29 18:17:05 +02001317 goto out_wakeup;
1318 }
1319
1320 /* size of bindResponse */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001321 msglen += (*(b_head(&check->bi) + msglen + 6) & 0x80) ? (*(b_head(&check->bi) + msglen + 6) & 0x7f) : 0;
Gabor Lekenyb4c81e42010-09-29 18:17:05 +02001322
1323 /* http://tools.ietf.org/html/rfc4511#section-4.1.9
1324 * ldapResult: 0x0a 0x01: ENUMERATION
1325 */
1326 if ((msglen > 4) ||
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001327 (memcmp(b_head(&check->bi) + 7 + msglen, "\x0a\x01", 2) != 0)) {
Simon Horman4a741432013-02-23 15:35:38 +09001328 set_server_check_status(check, HCHK_STATUS_L7RSP, "Not LDAPv3 protocol");
Gabor Lekenyb4c81e42010-09-29 18:17:05 +02001329 goto out_wakeup;
1330 }
1331
1332 /* http://tools.ietf.org/html/rfc4511#section-4.1.9
1333 * resultCode
1334 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001335 check->code = *(b_head(&check->bi) + msglen + 9);
Simon Horman4a741432013-02-23 15:35:38 +09001336 if (check->code) {
1337 set_server_check_status(check, HCHK_STATUS_L7STS, "See RFC: http://tools.ietf.org/html/rfc4511#section-4.1.9");
Gabor Lekenyb4c81e42010-09-29 18:17:05 +02001338 } else {
Simon Horman4a741432013-02-23 15:35:38 +09001339 set_server_check_status(check, HCHK_STATUS_L7OKD, "Success");
Gabor Lekenyb4c81e42010-09-29 18:17:05 +02001340 }
1341 }
Willy Tarreau1620ec32011-08-06 17:05:02 +02001342 break;
1343
Christopher Fauletba7bc162016-11-07 21:07:38 +01001344 case PR_O2_SPOP_CHK: {
1345 unsigned int framesz;
1346 char err[HCHK_DESC_LEN];
1347
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001348 if (!done && b_data(&check->bi) < 4)
Christopher Fauletba7bc162016-11-07 21:07:38 +01001349 goto wait_more_data;
1350
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001351 memcpy(&framesz, b_head(&check->bi), 4);
Christopher Fauletba7bc162016-11-07 21:07:38 +01001352 framesz = ntohl(framesz);
1353
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001354 if (!done && b_data(&check->bi) < (4+framesz))
Christopher Fauletba7bc162016-11-07 21:07:38 +01001355 goto wait_more_data;
1356
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001357 if (!spoe_handle_healthcheck_response(b_head(&check->bi)+4, framesz, err, HCHK_DESC_LEN-1))
Christopher Fauletba7bc162016-11-07 21:07:38 +01001358 set_server_check_status(check, HCHK_STATUS_L7OKD, "SPOA server is ok");
1359 else
1360 set_server_check_status(check, HCHK_STATUS_L7STS, err);
1361 break;
1362 }
1363
Willy Tarreau1620ec32011-08-06 17:05:02 +02001364 default:
Willy Tarreau06559ac2013-12-05 01:53:08 +01001365 /* for other checks (eg: pure TCP), delegate to the main task */
Willy Tarreau1620ec32011-08-06 17:05:02 +02001366 break;
1367 } /* switch */
Willy Tarreau83749182007-04-15 20:56:27 +02001368
Willy Tarreauc7dd71a2007-11-30 08:33:21 +01001369 out_wakeup:
Willy Tarreau25e2ab52013-12-04 11:17:05 +01001370 /* collect possible new errors */
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001371 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreaub5259bf2017-10-04 14:47:29 +02001372 chk_report_conn_err(check, 0, 0);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001373
Nick Chalk57b1bf72010-03-16 15:50:46 +00001374 /* Reset the check buffer... */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001375 *b_head(&check->bi) = '\0';
1376 b_reset(&check->bi);
Nick Chalk57b1bf72010-03-16 15:50:46 +00001377
Steven Davidovitz544d4812017-03-08 11:06:20 -08001378 /* Close the connection... We still attempt to nicely close if,
1379 * for instance, SSL needs to send a "close notify." Later, we perform
1380 * a hard close and reset the connection if some data are pending,
1381 * otherwise we end up with many TIME_WAITs and eat all the source port
1382 * range quickly. To avoid sending RSTs all the time, we first try to
1383 * drain pending data.
Willy Tarreaufd29cc52012-11-23 09:18:20 +01001384 */
Olivier Houchard8aa445d2019-07-02 16:35:18 +02001385 /* Call cs_shutr() first, to add the CO_FL_SOCK_RD_SH flag on the
1386 * connection, to make sure cs_shutw() will not lead to a shutdown()
1387 * that would provoke TIME_WAITs.
1388 */
1389 cs_shutr(cs, CS_SHR_DRAIN);
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001390 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau2b57cb82013-06-10 19:56:38 +02001391
Willy Tarreau25e2ab52013-12-04 11:17:05 +01001392 /* OK, let's not stay here forever */
Willy Tarreau6aaa1b82013-12-11 17:09:34 +01001393 if (check->result == CHK_RES_FAILED)
Willy Tarreau25e2ab52013-12-04 11:17:05 +01001394 conn->flags |= CO_FL_ERROR;
1395
Willy Tarreaufdccded2008-08-29 18:19:04 +02001396 task_wakeup(t, TASK_WOKEN_IO);
Olivier Houchardaf4021e2018-08-09 13:06:55 +02001397out:
Willy Tarreau3267d362012-08-17 23:53:56 +02001398 return;
Willy Tarreau03938182010-03-17 21:52:07 +01001399
1400 wait_more_data:
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001401 cs->conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
Olivier Houchardaf4021e2018-08-09 13:06:55 +02001402 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001403}
1404
Willy Tarreaufb56aab2012-09-28 14:40:02 +02001405/*
1406 * This function is used only for server health-checks. It handles connection
1407 * status updates including errors. If necessary, it wakes the check task up.
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001408 * It returns 0 on normal cases, <0 if at least one close() has happened on the
1409 * connection (eg: reconnect).
Willy Tarreaufb56aab2012-09-28 14:40:02 +02001410 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001411static int wake_srv_chk(struct conn_stream *cs)
Willy Tarreau20bea422012-07-06 12:00:49 +02001412{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001413 struct connection *conn = cs->conn;
1414 struct check *check = cs->data;
Olivier Houchard0923fa42019-01-11 18:43:04 +01001415 struct email_alertq *q = container_of(check, typeof(*q), check);
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001416 int ret = 0;
Willy Tarreau20bea422012-07-06 12:00:49 +02001417
Olivier Houchard0923fa42019-01-11 18:43:04 +01001418 if (check->server)
1419 HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock);
1420 else
1421 HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock);
Emeric Brunf6ba17d2017-11-02 14:35:27 +01001422
Willy Tarreauc09572f2017-10-04 11:58:22 +02001423 /* we may have to make progress on the TCP checks */
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001424 if (check->type == PR_O2_TCPCHK_CHK) {
1425 ret = tcpcheck_main(check);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001426 cs = check->cs;
Willy Tarreau543abd42018-09-20 11:25:12 +02001427 conn = cs->conn;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001428 } else if (!(check->wait_list.events & SUB_RETRY_SEND))
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001429 __event_srv_chk_w(cs);
Willy Tarreauc09572f2017-10-04 11:58:22 +02001430
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001431 if (unlikely(conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)) {
Willy Tarreau02b0f582013-12-03 15:42:33 +01001432 /* We may get error reports bypassing the I/O handlers, typically
1433 * the case when sending a pure TCP check which fails, then the I/O
1434 * handlers above are not called. This is completely handled by the
Willy Tarreau25e2ab52013-12-04 11:17:05 +01001435 * main processing task so let's simply wake it up. If we get here,
1436 * we expect errno to still be valid.
1437 */
Willy Tarreaub5259bf2017-10-04 14:47:29 +02001438 chk_report_conn_err(check, errno, 0);
Willy Tarreau2d351b62013-12-05 02:36:25 +01001439 task_wakeup(check->task, TASK_WOKEN_IO);
1440 }
Olivier Houchard53216e72018-10-10 15:46:36 +02001441 else if (!(conn->flags & CO_FL_HANDSHAKE) && !check->type) {
Willy Tarreau3be293f2014-02-05 18:31:24 +01001442 /* we may get here if only a connection probe was required : we
1443 * don't have any data to send nor anything expected in response,
1444 * so the completion of the connection establishment is enough.
1445 */
1446 task_wakeup(check->task, TASK_WOKEN_IO);
1447 }
Willy Tarreau2d351b62013-12-05 02:36:25 +01001448
Willy Tarreau6aaa1b82013-12-11 17:09:34 +01001449 if (check->result != CHK_RES_UNKNOWN) {
Christopher Faulet774c4862019-01-21 14:15:50 +01001450 /* Check complete or aborted. If connection not yet closed do it
1451 * now and wake the check task up to be sure the result is
1452 * handled ASAP. */
Willy Tarreaud85c4852015-03-13 00:40:28 +01001453 conn_sock_drain(conn);
Willy Tarreaua553ae92017-10-05 18:52:17 +02001454 cs_close(cs);
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001455 ret = -1;
Olivier Houchard865ed9b2019-07-02 17:42:22 +02001456 /* We may have been scheduled to run, and the
1457 * I/O handler expects to have a cs, so remove
1458 * the tasklet
1459 */
1460 tasklet_remove_from_tasklet_list(check->wait_list.tasklet);
Christopher Faulet774c4862019-01-21 14:15:50 +01001461 task_wakeup(check->task, TASK_WOKEN_IO);
Willy Tarreau2d351b62013-12-05 02:36:25 +01001462 }
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001463
Olivier Houchard0923fa42019-01-11 18:43:04 +01001464 if (check->server)
1465 HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock);
1466 else
1467 HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock);
Emeric Brunf6ba17d2017-11-02 14:35:27 +01001468
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001469 /* if a connection got replaced, we must absolutely prevent the connection
1470 * handler from touching its fd, and perform the FD polling updates ourselves
1471 */
1472 if (ret < 0)
1473 conn_cond_update_polling(conn);
1474
1475 return ret;
Willy Tarreau20bea422012-07-06 12:00:49 +02001476}
1477
Willy Tarreaufb56aab2012-09-28 14:40:02 +02001478struct data_cb check_conn_cb = {
Willy Tarreaufb56aab2012-09-28 14:40:02 +02001479 .wake = wake_srv_chk,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +01001480 .name = "CHCK",
Willy Tarreaufb56aab2012-09-28 14:40:02 +02001481};
1482
Willy Tarreaubaaee002006-06-26 02:48:02 +02001483/*
Willy Tarreau2e993902011-10-31 11:53:20 +01001484 * updates the server's weight during a warmup stage. Once the final weight is
1485 * reached, the task automatically stops. Note that any server status change
1486 * must have updated s->last_change accordingly.
1487 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02001488static struct task *server_warmup(struct task *t, void *context, unsigned short state)
Willy Tarreau2e993902011-10-31 11:53:20 +01001489{
Olivier Houchard9f6af332018-05-25 14:04:04 +02001490 struct server *s = context;
Willy Tarreau2e993902011-10-31 11:53:20 +01001491
1492 /* by default, plan on stopping the task */
1493 t->expire = TICK_ETERNITY;
Emeric Brun52a91d32017-08-31 14:41:55 +02001494 if ((s->next_admin & SRV_ADMF_MAINT) ||
1495 (s->next_state != SRV_ST_STARTING))
Willy Tarreau2e993902011-10-31 11:53:20 +01001496 return t;
1497
Willy Tarreau4fc49a92019-05-05 06:54:22 +02001498 HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
1499
Willy Tarreau892337c2014-05-13 23:41:20 +02001500 /* recalculate the weights and update the state */
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001501 server_recalc_eweight(s, 1);
Willy Tarreau2e993902011-10-31 11:53:20 +01001502
1503 /* probably that we can refill this server with a bit more connections */
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001504 pendconn_grab_from_px(s);
Willy Tarreau2e993902011-10-31 11:53:20 +01001505
Willy Tarreau4fc49a92019-05-05 06:54:22 +02001506 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
1507
Willy Tarreau2e993902011-10-31 11:53:20 +01001508 /* get back there in 1 second or 1/20th of the slowstart interval,
1509 * whichever is greater, resulting in small 5% steps.
1510 */
Emeric Brun52a91d32017-08-31 14:41:55 +02001511 if (s->next_state == SRV_ST_STARTING)
Willy Tarreau2e993902011-10-31 11:53:20 +01001512 t->expire = tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20)));
1513 return t;
1514}
1515
Willy Tarreau894c6422017-10-04 15:58:52 +02001516/* returns the first NON-COMMENT tcp-check rule from list <list> or NULL if
1517 * none was found.
1518 */
1519static struct tcpcheck_rule *get_first_tcpcheck_rule(struct list *list)
1520{
1521 struct tcpcheck_rule *r;
1522
1523 list_for_each_entry(r, list, list) {
1524 if (r->action != TCPCHK_ACT_COMMENT)
1525 return r;
1526 }
1527 return NULL;
1528}
1529
Willy Tarreau2e993902011-10-31 11:53:20 +01001530/*
Simon Horman98637e52014-06-20 12:30:16 +09001531 * establish a server health-check that makes use of a connection.
Simon Hormanb00d17a2014-06-13 16:18:16 +09001532 *
1533 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001534 * - SF_ERR_NONE if everything's OK and tcpcheck_main() was not called
1535 * - SF_ERR_UP if if everything's OK and tcpcheck_main() was called
1536 * - SF_ERR_SRVTO if there are no more servers
1537 * - SF_ERR_SRVCL if the connection was refused by the server
1538 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1539 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1540 * - SF_ERR_INTERNAL for any other purely internal errors
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02001541 * - SF_ERR_CHK_PORT if no port could be found to run a health check on an AF_INET* socket
Tim Düsterhus4896c442016-11-29 02:15:19 +01001542 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Simon Hormanb00d17a2014-06-13 16:18:16 +09001543 * Note that we try to prevent the network stack from sending the ACK during the
1544 * connect() when a pure TCP check is used (without PROXY protocol).
1545 */
Simon Horman98637e52014-06-20 12:30:16 +09001546static int connect_conn_chk(struct task *t)
Simon Hormanb00d17a2014-06-13 16:18:16 +09001547{
1548 struct check *check = t->context;
1549 struct server *s = check->server;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001550 struct conn_stream *cs = check->cs;
1551 struct connection *conn = cs_conn(cs);
Simon Hormanb00d17a2014-06-13 16:18:16 +09001552 struct protocol *proto;
Willy Tarreauf411cce2017-10-04 16:21:19 +02001553 struct tcpcheck_rule *tcp_rule = NULL;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001554 int ret;
Olivier Houchardfdcb0072019-05-06 18:32:29 +02001555 int connflags = 0;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001556
Willy Tarreau00149122017-10-04 18:05:01 +02001557 /* we cannot have a connection here */
1558 if (conn)
1559 return SF_ERR_INTERNAL;
1560
Simon Hormanb00d17a2014-06-13 16:18:16 +09001561 /* tcpcheck send/expect initialisation */
Willy Tarreauf411cce2017-10-04 16:21:19 +02001562 if (check->type == PR_O2_TCPCHK_CHK) {
Simon Hormanb00d17a2014-06-13 16:18:16 +09001563 check->current_step = NULL;
Willy Tarreauf411cce2017-10-04 16:21:19 +02001564 tcp_rule = get_first_tcpcheck_rule(check->tcpcheck_rules);
1565 }
Simon Hormanb00d17a2014-06-13 16:18:16 +09001566
1567 /* prepare the check buffer.
1568 * This should not be used if check is the secondary agent check
1569 * of a server as s->proxy->check_req will relate to the
1570 * configuration of the primary check. Similarly, tcp-check uses
1571 * its own strings.
1572 */
1573 if (check->type && check->type != PR_O2_TCPCHK_CHK && !(check->state & CHK_ST_AGENT)) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001574 b_putblk(&check->bo, s->proxy->check_req, s->proxy->check_len);
Simon Hormanb00d17a2014-06-13 16:18:16 +09001575
1576 /* we want to check if this host replies to HTTP or SSLv3 requests
1577 * so we'll send the request, and won't wake the checker up now.
1578 */
1579 if ((check->type) == PR_O2_SSL3_CHK) {
1580 /* SSL requires that we put Unix time in the request */
1581 int gmt_time = htonl(date.tv_sec);
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001582 memcpy(b_head(&check->bo) + 11, &gmt_time, 4);
Simon Hormanb00d17a2014-06-13 16:18:16 +09001583 }
1584 else if ((check->type) == PR_O2_HTTP_CHK) {
1585 if (s->proxy->options2 & PR_O2_CHK_SNDST)
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001586 b_putblk(&check->bo, trash.area,
1587 httpchk_build_status_header(s, trash.area, trash.size));
Cyril Bonté32602d22015-01-30 00:07:07 +01001588 /* prevent HTTP keep-alive when "http-check expect" is used */
1589 if (s->proxy->options2 & PR_O2_EXP_TYPE)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001590 b_putist(&check->bo, ist("Connection: close\r\n"));
1591 b_putist(&check->bo, ist("\r\n"));
1592 *b_tail(&check->bo) = '\0'; /* to make gdb output easier to read */
Simon Hormanb00d17a2014-06-13 16:18:16 +09001593 }
1594 }
1595
James Brown55f9ff12015-10-21 18:19:05 -07001596 if ((check->type & PR_O2_LB_AGENT_CHK) && check->send_string_len) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001597 b_putblk(&check->bo, check->send_string, check->send_string_len);
James Brown55f9ff12015-10-21 18:19:05 -07001598 }
1599
Willy Tarreauf411cce2017-10-04 16:21:19 +02001600 /* for tcp-checks, the initial connection setup is handled separately as
1601 * it may be sent to a specific port and not to the server's.
1602 */
1603 if (tcp_rule && tcp_rule->action == TCPCHK_ACT_CONNECT) {
1604 tcpcheck_main(check);
1605 return SF_ERR_UP;
1606 }
1607
Simon Hormanb00d17a2014-06-13 16:18:16 +09001608 /* prepare a new connection */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001609 cs = check->cs = cs_new(NULL);
1610 if (!check->cs)
Willy Tarreau00149122017-10-04 18:05:01 +02001611 return SF_ERR_RESOURCE;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001612 conn = cs->conn;
Olivier Houchard26e1a8f2018-09-12 15:15:12 +02001613 /* Maybe there were an older connection we were waiting on */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001614 check->wait_list.events = 0;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001615
Simon Horman41f58762015-01-30 11:22:56 +09001616 if (is_addr(&check->addr)) {
Simon Hormanb00d17a2014-06-13 16:18:16 +09001617 /* we'll connect to the check addr specified on the server */
Simon Horman41f58762015-01-30 11:22:56 +09001618 conn->addr.to = check->addr;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001619 }
1620 else {
1621 /* we'll connect to the addr on the server */
1622 conn->addr.to = s->addr;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001623 }
1624
Alexander Liu2a54bb72019-05-22 19:44:48 +08001625 if (s->check.via_socks4 && (s->flags & SRV_F_SOCKS4_PROXY)) {
1626 conn->send_proxy_ofs = 1;
1627 conn->flags |= CO_FL_SOCKS4;
1628 }
1629
Olivier Houchard6377a002017-12-01 22:04:05 +01001630 proto = protocol_by_family(conn->addr.to.ss_family);
Olivier Houchard6377a002017-12-01 22:04:05 +01001631 conn->target = &s->obj_type;
1632
Willy Tarreaube373152018-09-06 11:45:30 +02001633 if ((conn->addr.to.ss_family == AF_INET) || (conn->addr.to.ss_family == AF_INET6)) {
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02001634 int i = 0;
1635
1636 i = srv_check_healthcheck_port(check);
Olivier Houchard6377a002017-12-01 22:04:05 +01001637 if (i == 0)
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02001638 return SF_ERR_CHK_PORT;
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02001639
1640 set_host_port(&conn->addr.to, i);
Simon Hormanb00d17a2014-06-13 16:18:16 +09001641 }
1642
Thierry FOURNIERbb2ae642015-01-14 11:31:49 +01001643 /* no client address */
1644 clear_addr(&conn->addr.from);
1645
Willy Tarreaube373152018-09-06 11:45:30 +02001646 conn_prepare(conn, proto, check->xprt);
Olivier Houchardf67be932019-01-29 15:47:43 +01001647 if (conn_install_mux(conn, &mux_pt_ops, cs, s->proxy, NULL) < 0)
1648 return SF_ERR_RESOURCE;
Willy Tarreaube373152018-09-06 11:45:30 +02001649 cs_attach(cs, check, &check_conn_cb);
1650
Willy Tarreauf3d34822014-12-08 12:11:28 +01001651 /* only plain tcp-check supports quick ACK */
Olivier Houchardfdcb0072019-05-06 18:32:29 +02001652 if (check->type != 0)
1653 connflags |= CONNECT_HAS_DATA;
1654 if ((check->type == 0 || check->type == PR_O2_TCPCHK_CHK) &&
1655 (!tcp_rule || tcp_rule->action != TCPCHK_ACT_EXPECT))
1656 connflags |= CONNECT_DELACK_ALWAYS;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001657
Willy Tarreaue7dff022015-04-03 01:14:29 +02001658 ret = SF_ERR_INTERNAL;
Olivier Houchardb68fda42017-08-04 18:39:01 +02001659 if (proto && proto->connect)
Olivier Houchardfdcb0072019-05-06 18:32:29 +02001660 ret = proto->connect(conn, connflags);
Willy Tarreau16257f62017-11-02 15:45:00 +01001661
Willy Tarreau16257f62017-11-02 15:45:00 +01001662
Olivier Houchard9130a962017-10-17 17:33:43 +02001663#ifdef USE_OPENSSL
Olivier Houcharda48437b2019-01-29 16:37:52 +01001664 if (ret == SF_ERR_NONE) {
1665 if (s->check.sni)
1666 ssl_sock_set_servername(conn, s->check.sni);
1667 if (s->check.alpn_str)
1668 ssl_sock_set_alpn(conn, (unsigned char *)s->check.alpn_str,
1669 s->check.alpn_len);
1670 }
Olivier Houchard9130a962017-10-17 17:33:43 +02001671#endif
Willy Tarreauf4949772017-05-06 08:45:28 +02001672 if (s->check.send_proxy && !(check->state & CHK_ST_AGENT)) {
Simon Hormanb00d17a2014-06-13 16:18:16 +09001673 conn->send_proxy_ofs = 1;
1674 conn->flags |= CO_FL_SEND_PROXY;
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001675 if (xprt_add_hs(conn) < 0)
1676 ret = SF_ERR_RESOURCE;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001677 }
1678
1679 return ret;
1680}
1681
Simon Horman98637e52014-06-20 12:30:16 +09001682static struct list pid_list = LIST_HEAD_INIT(pid_list);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001683static struct pool_head *pool_head_pid_list;
Willy Tarreau86abe442018-11-25 20:12:18 +01001684__decl_spinlock(pid_list_lock);
Simon Horman98637e52014-06-20 12:30:16 +09001685
1686void block_sigchld(void)
1687{
1688 sigset_t set;
1689 sigemptyset(&set);
1690 sigaddset(&set, SIGCHLD);
William Lallemand6e1796e2018-06-07 11:23:40 +02001691 assert(ha_sigmask(SIG_BLOCK, &set, NULL) == 0);
Simon Horman98637e52014-06-20 12:30:16 +09001692}
1693
1694void unblock_sigchld(void)
1695{
1696 sigset_t set;
1697 sigemptyset(&set);
Willy Tarreauebc92442016-06-21 17:29:46 +02001698 sigaddset(&set, SIGCHLD);
William Lallemand6e1796e2018-06-07 11:23:40 +02001699 assert(ha_sigmask(SIG_UNBLOCK, &set, NULL) == 0);
Simon Horman98637e52014-06-20 12:30:16 +09001700}
1701
Simon Horman98637e52014-06-20 12:30:16 +09001702static struct pid_list *pid_list_add(pid_t pid, struct task *t)
1703{
1704 struct pid_list *elem;
1705 struct check *check = t->context;
1706
Willy Tarreaubafbe012017-11-24 17:34:44 +01001707 elem = pool_alloc(pool_head_pid_list);
Simon Horman98637e52014-06-20 12:30:16 +09001708 if (!elem)
1709 return NULL;
1710 elem->pid = pid;
1711 elem->t = t;
1712 elem->exited = 0;
1713 check->curpid = elem;
1714 LIST_INIT(&elem->list);
Christopher Fauletcfda8472017-10-20 15:40:23 +02001715
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001716 HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock);
Simon Horman98637e52014-06-20 12:30:16 +09001717 LIST_ADD(&pid_list, &elem->list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001718 HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock);
Christopher Fauletcfda8472017-10-20 15:40:23 +02001719
Simon Horman98637e52014-06-20 12:30:16 +09001720 return elem;
1721}
1722
Simon Horman98637e52014-06-20 12:30:16 +09001723static void pid_list_del(struct pid_list *elem)
1724{
1725 struct check *check;
1726
1727 if (!elem)
1728 return;
1729
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001730 HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock);
Simon Horman98637e52014-06-20 12:30:16 +09001731 LIST_DEL(&elem->list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001732 HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock);
Christopher Fauletcfda8472017-10-20 15:40:23 +02001733
Simon Horman98637e52014-06-20 12:30:16 +09001734 if (!elem->exited)
1735 kill(elem->pid, SIGTERM);
1736
1737 check = elem->t->context;
1738 check->curpid = NULL;
Willy Tarreaubafbe012017-11-24 17:34:44 +01001739 pool_free(pool_head_pid_list, elem);
Simon Horman98637e52014-06-20 12:30:16 +09001740}
1741
1742/* Called from inside SIGCHLD handler, SIGCHLD is blocked */
1743static void pid_list_expire(pid_t pid, int status)
1744{
1745 struct pid_list *elem;
1746
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001747 HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock);
Simon Horman98637e52014-06-20 12:30:16 +09001748 list_for_each_entry(elem, &pid_list, list) {
1749 if (elem->pid == pid) {
1750 elem->t->expire = now_ms;
1751 elem->status = status;
1752 elem->exited = 1;
Cyril Bonté9dbcfab2014-08-07 01:55:39 +02001753 task_wakeup(elem->t, TASK_WOKEN_IO);
Christopher Fauletcfda8472017-10-20 15:40:23 +02001754 break;
Simon Horman98637e52014-06-20 12:30:16 +09001755 }
1756 }
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001757 HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock);
Simon Horman98637e52014-06-20 12:30:16 +09001758}
1759
Willy Tarreau48d6bf22016-06-21 16:27:34 +02001760static void sigchld_handler(struct sig_handler *sh)
Simon Horman98637e52014-06-20 12:30:16 +09001761{
1762 pid_t pid;
1763 int status;
Willy Tarreau48d6bf22016-06-21 16:27:34 +02001764
Simon Horman98637e52014-06-20 12:30:16 +09001765 while ((pid = waitpid(0, &status, WNOHANG)) > 0)
1766 pid_list_expire(pid, status);
1767}
1768
Willy Tarreau48d6bf22016-06-21 16:27:34 +02001769static int init_pid_list(void)
1770{
Willy Tarreaubafbe012017-11-24 17:34:44 +01001771 if (pool_head_pid_list != NULL)
Simon Horman98637e52014-06-20 12:30:16 +09001772 /* Nothing to do */
1773 return 0;
1774
Willy Tarreau48d6bf22016-06-21 16:27:34 +02001775 if (!signal_register_fct(SIGCHLD, sigchld_handler, SIGCHLD)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001776 ha_alert("Failed to set signal handler for external health checks: %s. Aborting.\n",
1777 strerror(errno));
Simon Horman98637e52014-06-20 12:30:16 +09001778 return 1;
1779 }
1780
Willy Tarreaubafbe012017-11-24 17:34:44 +01001781 pool_head_pid_list = create_pool("pid_list", sizeof(struct pid_list), MEM_F_SHARED);
1782 if (pool_head_pid_list == NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001783 ha_alert("Failed to allocate memory pool for external health checks: %s. Aborting.\n",
1784 strerror(errno));
Simon Horman98637e52014-06-20 12:30:16 +09001785 return 1;
1786 }
1787
1788 return 0;
1789}
1790
Cyril Bontéac92a062014-12-27 22:28:38 +01001791/* helper macro to set an environment variable and jump to a specific label on failure. */
1792#define EXTCHK_SETENV(check, envidx, value, fail) { if (extchk_setenv(check, envidx, value)) goto fail; }
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001793
1794/*
Cyril Bontéac92a062014-12-27 22:28:38 +01001795 * helper function to allocate enough memory to store an environment variable.
1796 * It will also check that the environment variable is updatable, and silently
1797 * fail if not.
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001798 */
Cyril Bontéac92a062014-12-27 22:28:38 +01001799static int extchk_setenv(struct check *check, int idx, const char *value)
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001800{
1801 int len, ret;
Cyril Bontéac92a062014-12-27 22:28:38 +01001802 char *envname;
1803 int vmaxlen;
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001804
Cyril Bontéac92a062014-12-27 22:28:38 +01001805 if (idx < 0 || idx >= EXTCHK_SIZE) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001806 ha_alert("Illegal environment variable index %d. Aborting.\n", idx);
Cyril Bontéac92a062014-12-27 22:28:38 +01001807 return 1;
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001808 }
Cyril Bontéac92a062014-12-27 22:28:38 +01001809
1810 envname = extcheck_envs[idx].name;
1811 vmaxlen = extcheck_envs[idx].vmaxlen;
1812
1813 /* Check if the environment variable is already set, and silently reject
1814 * the update if this one is not updatable. */
1815 if ((vmaxlen == EXTCHK_SIZE_EVAL_INIT) && (check->envp[idx]))
1816 return 0;
1817
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001818 /* Instead of sending NOT_USED, sending an empty value is preferable */
1819 if (strcmp(value, "NOT_USED") == 0) {
1820 value = "";
1821 }
Cyril Bontéac92a062014-12-27 22:28:38 +01001822
1823 len = strlen(envname) + 1;
1824 if (vmaxlen == EXTCHK_SIZE_EVAL_INIT)
1825 len += strlen(value);
1826 else
1827 len += vmaxlen;
1828
1829 if (!check->envp[idx])
1830 check->envp[idx] = malloc(len + 1);
1831
1832 if (!check->envp[idx]) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001833 ha_alert("Failed to allocate memory for the environment variable '%s'. Aborting.\n", envname);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001834 return 1;
1835 }
Cyril Bontéac92a062014-12-27 22:28:38 +01001836 ret = snprintf(check->envp[idx], len + 1, "%s=%s", envname, value);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001837 if (ret < 0) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001838 ha_alert("Failed to store the environment variable '%s'. Reason : %s. Aborting.\n", envname, strerror(errno));
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001839 return 1;
1840 }
Cyril Bontéac92a062014-12-27 22:28:38 +01001841 else if (ret > len) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001842 ha_alert("Environment variable '%s' was truncated. Aborting.\n", envname);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001843 return 1;
1844 }
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001845 return 0;
1846}
Simon Horman98637e52014-06-20 12:30:16 +09001847
1848static int prepare_external_check(struct check *check)
1849{
1850 struct server *s = check->server;
1851 struct proxy *px = s->proxy;
1852 struct listener *listener = NULL, *l;
1853 int i;
Simon Horman98637e52014-06-20 12:30:16 +09001854 const char *path = px->check_path ? px->check_path : DEF_CHECK_PATH;
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001855 char buf[256];
Simon Horman98637e52014-06-20 12:30:16 +09001856
1857 list_for_each_entry(l, &px->conf.listeners, by_fe)
1858 /* Use the first INET, INET6 or UNIX listener */
1859 if (l->addr.ss_family == AF_INET ||
1860 l->addr.ss_family == AF_INET6 ||
1861 l->addr.ss_family == AF_UNIX) {
1862 listener = l;
1863 break;
1864 }
1865
Simon Horman98637e52014-06-20 12:30:16 +09001866 check->curpid = NULL;
Cyril Bontéac92a062014-12-27 22:28:38 +01001867 check->envp = calloc((EXTCHK_SIZE + 1), sizeof(char *));
1868 if (!check->envp) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001869 ha_alert("Failed to allocate memory for environment variables. Aborting\n");
Cyril Bontéac92a062014-12-27 22:28:38 +01001870 goto err;
1871 }
Simon Horman98637e52014-06-20 12:30:16 +09001872
Cyril Bontéac92a062014-12-27 22:28:38 +01001873 check->argv = calloc(6, sizeof(char *));
1874 if (!check->argv) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001875 ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id);
Simon Horman98637e52014-06-20 12:30:16 +09001876 goto err;
Cyril Bontéac92a062014-12-27 22:28:38 +01001877 }
Simon Horman98637e52014-06-20 12:30:16 +09001878
1879 check->argv[0] = px->check_command;
1880
Cyril Bonté777be862014-12-02 21:21:35 +01001881 if (!listener) {
1882 check->argv[1] = strdup("NOT_USED");
1883 check->argv[2] = strdup("NOT_USED");
1884 }
1885 else if (listener->addr.ss_family == AF_INET ||
Simon Horman98637e52014-06-20 12:30:16 +09001886 listener->addr.ss_family == AF_INET6) {
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001887 addr_to_str(&listener->addr, buf, sizeof(buf));
1888 check->argv[1] = strdup(buf);
1889 port_to_str(&listener->addr, buf, sizeof(buf));
1890 check->argv[2] = strdup(buf);
Cyril Bonté777be862014-12-02 21:21:35 +01001891 }
1892 else if (listener->addr.ss_family == AF_UNIX) {
Simon Horman98637e52014-06-20 12:30:16 +09001893 const struct sockaddr_un *un;
1894
1895 un = (struct sockaddr_un *)&listener->addr;
1896 check->argv[1] = strdup(un->sun_path);
1897 check->argv[2] = strdup("NOT_USED");
Cyril Bonté777be862014-12-02 21:21:35 +01001898 }
1899 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001900 ha_alert("Starting [%s:%s] check: unsupported address family.\n", px->id, s->id);
Simon Horman98637e52014-06-20 12:30:16 +09001901 goto err;
1902 }
1903
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001904 addr_to_str(&s->addr, buf, sizeof(buf));
1905 check->argv[3] = strdup(buf);
Willy Tarreau04276f32017-01-06 17:41:29 +01001906
1907 if (s->addr.ss_family == AF_INET || s->addr.ss_family == AF_INET6)
1908 snprintf(buf, sizeof(buf), "%u", s->svc_port);
1909 else
1910 *buf = 0;
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001911 check->argv[4] = strdup(buf);
Simon Horman98637e52014-06-20 12:30:16 +09001912
Cyril Bontéac92a062014-12-27 22:28:38 +01001913 for (i = 0; i < 5; i++) {
1914 if (!check->argv[i]) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001915 ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id);
Simon Horman98637e52014-06-20 12:30:16 +09001916 goto err;
Cyril Bontéac92a062014-12-27 22:28:38 +01001917 }
1918 }
Simon Horman98637e52014-06-20 12:30:16 +09001919
Cyril Bontéac92a062014-12-27 22:28:38 +01001920 EXTCHK_SETENV(check, EXTCHK_PATH, path, err);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001921 /* Add proxy environment variables */
Cyril Bontéac92a062014-12-27 22:28:38 +01001922 EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_NAME, px->id, err);
1923 EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_ID, ultoa_r(px->uuid, buf, sizeof(buf)), err);
1924 EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_ADDR, check->argv[1], err);
1925 EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_PORT, check->argv[2], err);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001926 /* Add server environment variables */
Cyril Bontéac92a062014-12-27 22:28:38 +01001927 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_NAME, s->id, err);
1928 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_ID, ultoa_r(s->puid, buf, sizeof(buf)), err);
1929 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_ADDR, check->argv[3], err);
1930 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_PORT, check->argv[4], err);
1931 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_MAXCONN, ultoa_r(s->maxconn, buf, sizeof(buf)), err);
1932 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_CURCONN, ultoa_r(s->cur_sess, buf, sizeof(buf)), err);
1933
1934 /* Ensure that we don't leave any hole in check->envp */
1935 for (i = 0; i < EXTCHK_SIZE; i++)
1936 if (!check->envp[i])
1937 EXTCHK_SETENV(check, i, "", err);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001938
Cyril Bonté99c5bf52014-08-07 01:55:38 +02001939 return 1;
Simon Horman98637e52014-06-20 12:30:16 +09001940err:
1941 if (check->envp) {
Cyril Bontéac92a062014-12-27 22:28:38 +01001942 for (i = 0; i < EXTCHK_SIZE; i++)
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001943 free(check->envp[i]);
Simon Horman98637e52014-06-20 12:30:16 +09001944 free(check->envp);
1945 check->envp = NULL;
1946 }
1947
1948 if (check->argv) {
1949 for (i = 1; i < 5; i++)
1950 free(check->argv[i]);
1951 free(check->argv);
1952 check->argv = NULL;
1953 }
Cyril Bonté99c5bf52014-08-07 01:55:38 +02001954 return 0;
Simon Horman98637e52014-06-20 12:30:16 +09001955}
1956
Simon Hormanb00d17a2014-06-13 16:18:16 +09001957/*
Simon Horman98637e52014-06-20 12:30:16 +09001958 * establish a server health-check that makes use of a process.
1959 *
1960 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001961 * - SF_ERR_NONE if everything's OK
Willy Tarreaue7dff022015-04-03 01:14:29 +02001962 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
Tim Düsterhus4896c442016-11-29 02:15:19 +01001963 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Simon Horman98637e52014-06-20 12:30:16 +09001964 *
1965 * Blocks and then unblocks SIGCHLD
1966 */
1967static int connect_proc_chk(struct task *t)
1968{
Cyril Bontéac92a062014-12-27 22:28:38 +01001969 char buf[256];
Simon Horman98637e52014-06-20 12:30:16 +09001970 struct check *check = t->context;
1971 struct server *s = check->server;
1972 struct proxy *px = s->proxy;
1973 int status;
1974 pid_t pid;
1975
Willy Tarreaue7dff022015-04-03 01:14:29 +02001976 status = SF_ERR_RESOURCE;
Simon Horman98637e52014-06-20 12:30:16 +09001977
1978 block_sigchld();
1979
1980 pid = fork();
1981 if (pid < 0) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001982 ha_alert("Failed to fork process for external health check: %s. Aborting.\n",
1983 strerror(errno));
Simon Horman98637e52014-06-20 12:30:16 +09001984 set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno));
1985 goto out;
1986 }
1987 if (pid == 0) {
1988 /* Child */
1989 extern char **environ;
Willy Tarreau9f6dc722019-03-01 11:15:10 +01001990 struct rlimit limit;
Willy Tarreaub7b24782016-06-21 15:32:29 +02001991 int fd;
1992
1993 /* close all FDs. Keep stdin/stdout/stderr in verbose mode */
1994 fd = (global.mode & (MODE_QUIET|MODE_VERBOSE)) == MODE_QUIET ? 0 : 3;
1995
Willy Tarreau2555ccf2019-02-21 22:22:06 +01001996 my_closefrom(fd);
Willy Tarreaub7b24782016-06-21 15:32:29 +02001997
Willy Tarreau9f6dc722019-03-01 11:15:10 +01001998 /* restore the initial FD limits */
1999 limit.rlim_cur = rlim_fd_cur_at_boot;
2000 limit.rlim_max = rlim_fd_max_at_boot;
2001 if (setrlimit(RLIMIT_NOFILE, &limit) == -1) {
2002 getrlimit(RLIMIT_NOFILE, &limit);
2003 ha_warning("External check: failed to restore initial FD limits (cur=%u max=%u), using cur=%u max=%u\n",
2004 rlim_fd_cur_at_boot, rlim_fd_max_at_boot,
2005 (unsigned int)limit.rlim_cur, (unsigned int)limit.rlim_max);
2006 }
2007
Simon Horman98637e52014-06-20 12:30:16 +09002008 environ = check->envp;
Cyril Bontéac92a062014-12-27 22:28:38 +01002009 extchk_setenv(check, EXTCHK_HAPROXY_SERVER_CURCONN, ultoa_r(s->cur_sess, buf, sizeof(buf)));
Willy Tarreauafc313e2019-07-01 07:51:29 +02002010 haproxy_unblock_signals();
Simon Horman98637e52014-06-20 12:30:16 +09002011 execvp(px->check_command, check->argv);
Christopher Faulet767a84b2017-11-24 16:50:31 +01002012 ha_alert("Failed to exec process for external health check: %s. Aborting.\n",
2013 strerror(errno));
Simon Horman98637e52014-06-20 12:30:16 +09002014 exit(-1);
2015 }
2016
2017 /* Parent */
2018 if (check->result == CHK_RES_UNKNOWN) {
2019 if (pid_list_add(pid, t) != NULL) {
2020 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
2021
2022 if (px->timeout.check && px->timeout.connect) {
2023 int t_con = tick_add(now_ms, px->timeout.connect);
2024 t->expire = tick_first(t->expire, t_con);
2025 }
Willy Tarreaue7dff022015-04-03 01:14:29 +02002026 status = SF_ERR_NONE;
Simon Horman98637e52014-06-20 12:30:16 +09002027 goto out;
2028 }
2029 else {
2030 set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno));
2031 }
2032 kill(pid, SIGTERM); /* process creation error */
2033 }
2034 else
2035 set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno));
2036
2037out:
2038 unblock_sigchld();
2039 return status;
2040}
2041
2042/*
Willy Tarreau1e62e2a2017-10-04 15:07:02 +02002043 * manages a server health-check that uses an external process. Returns
Willy Tarreaubaaee002006-06-26 02:48:02 +02002044 * the time the task accepts to wait, or TIME_ETERNITY for infinity.
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002045 *
2046 * Please do NOT place any return statement in this function and only leave
2047 * via the out_unlock label.
Willy Tarreaubaaee002006-06-26 02:48:02 +02002048 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02002049static struct task *process_chk_proc(struct task *t, void *context, unsigned short state)
Simon Horman98637e52014-06-20 12:30:16 +09002050{
Olivier Houchard9f6af332018-05-25 14:04:04 +02002051 struct check *check = context;
Simon Horman98637e52014-06-20 12:30:16 +09002052 struct server *s = check->server;
Simon Horman98637e52014-06-20 12:30:16 +09002053 int rv;
2054 int ret;
2055 int expired = tick_is_expired(t->expire, now_ms);
2056
Christopher Faulet2a944ee2017-11-07 10:42:54 +01002057 HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock);
Simon Horman98637e52014-06-20 12:30:16 +09002058 if (!(check->state & CHK_ST_INPROGRESS)) {
2059 /* no check currently running */
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002060 if (!expired) /* woke up too early */
2061 goto out_unlock;
Simon Horman98637e52014-06-20 12:30:16 +09002062
2063 /* we don't send any health-checks when the proxy is
2064 * stopped, the server should not be checked or the check
2065 * is disabled.
2066 */
2067 if (((check->state & (CHK_ST_ENABLED | CHK_ST_PAUSED)) != CHK_ST_ENABLED) ||
2068 s->proxy->state == PR_STSTOPPED)
2069 goto reschedule;
2070
2071 /* we'll initiate a new check */
2072 set_server_check_status(check, HCHK_STATUS_START, NULL);
2073
2074 check->state |= CHK_ST_INPROGRESS;
2075
Simon Hormandbf70192015-01-30 11:22:53 +09002076 ret = connect_proc_chk(t);
Willy Tarreaud7c3fbd2017-10-04 15:19:26 +02002077 if (ret == SF_ERR_NONE) {
Willy Tarreau1e62e2a2017-10-04 15:07:02 +02002078 /* the process was forked, we allow up to min(inter,
2079 * timeout.connect) for it to report its status, but
2080 * only when timeout.check is set as it may be to short
2081 * for a full check otherwise.
Simon Horman98637e52014-06-20 12:30:16 +09002082 */
2083 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
2084
2085 if (s->proxy->timeout.check && s->proxy->timeout.connect) {
2086 int t_con = tick_add(now_ms, s->proxy->timeout.connect);
2087 t->expire = tick_first(t->expire, t_con);
2088 }
Christopher Faulet88ce5d12017-10-20 15:41:18 +02002089 task_set_affinity(t, tid_bit);
Simon Horman98637e52014-06-20 12:30:16 +09002090 goto reschedule;
Simon Horman98637e52014-06-20 12:30:16 +09002091 }
2092
Willy Tarreau1e62e2a2017-10-04 15:07:02 +02002093 /* here, we failed to start the check */
Simon Horman98637e52014-06-20 12:30:16 +09002094
2095 check->state &= ~CHK_ST_INPROGRESS;
2096 check_notify_failure(check);
2097
2098 /* we allow up to min(inter, timeout.connect) for a connection
2099 * to establish but only when timeout.check is set
2100 * as it may be to short for a full check otherwise
2101 */
2102 while (tick_is_expired(t->expire, now_ms)) {
2103 int t_con;
2104
2105 t_con = tick_add(t->expire, s->proxy->timeout.connect);
2106 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
2107
2108 if (s->proxy->timeout.check)
2109 t->expire = tick_first(t->expire, t_con);
2110 }
2111 }
2112 else {
2113 /* there was a test running.
2114 * First, let's check whether there was an uncaught error,
2115 * which can happen on connect timeout or error.
2116 */
2117 if (check->result == CHK_RES_UNKNOWN) {
2118 /* good connection is enough for pure TCP check */
2119 struct pid_list *elem = check->curpid;
2120 int status = HCHK_STATUS_UNKNOWN;
2121
2122 if (elem->exited) {
2123 status = elem->status; /* Save in case the process exits between use below */
2124 if (!WIFEXITED(status))
2125 check->code = -1;
2126 else
2127 check->code = WEXITSTATUS(status);
2128 if (!WIFEXITED(status) || WEXITSTATUS(status))
2129 status = HCHK_STATUS_PROCERR;
2130 else
2131 status = HCHK_STATUS_PROCOK;
2132 } else if (expired) {
2133 status = HCHK_STATUS_PROCTOUT;
Christopher Faulet767a84b2017-11-24 16:50:31 +01002134 ha_warning("kill %d\n", (int)elem->pid);
Simon Horman98637e52014-06-20 12:30:16 +09002135 kill(elem->pid, SIGTERM);
2136 }
2137 set_server_check_status(check, status, NULL);
2138 }
2139
2140 if (check->result == CHK_RES_FAILED) {
2141 /* a failure or timeout detected */
2142 check_notify_failure(check);
2143 }
2144 else if (check->result == CHK_RES_CONDPASS) {
2145 /* check is OK but asks for stopping mode */
2146 check_notify_stopping(check);
2147 }
2148 else if (check->result == CHK_RES_PASSED) {
2149 /* a success was detected */
2150 check_notify_success(check);
2151 }
Christopher Faulet88ce5d12017-10-20 15:41:18 +02002152 task_set_affinity(t, MAX_THREADS_MASK);
Simon Horman98637e52014-06-20 12:30:16 +09002153 check->state &= ~CHK_ST_INPROGRESS;
2154
2155 pid_list_del(check->curpid);
2156
2157 rv = 0;
2158 if (global.spread_checks > 0) {
2159 rv = srv_getinter(check) * global.spread_checks / 100;
2160 rv -= (int) (2 * rv * (rand() / (RAND_MAX + 1.0)));
2161 }
2162 t->expire = tick_add(now_ms, MS_TO_TICKS(srv_getinter(check) + rv));
2163 }
2164
2165 reschedule:
2166 while (tick_is_expired(t->expire, now_ms))
2167 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002168
2169 out_unlock:
Christopher Faulet2a944ee2017-11-07 10:42:54 +01002170 HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock);
Simon Horman98637e52014-06-20 12:30:16 +09002171 return t;
2172}
2173
2174/*
2175 * manages a server health-check that uses a connection. Returns
2176 * the time the task accepts to wait, or TIME_ETERNITY for infinity.
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002177 *
2178 * Please do NOT place any return statement in this function and only leave
2179 * via the out_unlock label.
Simon Horman98637e52014-06-20 12:30:16 +09002180 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02002181static struct task *process_chk_conn(struct task *t, void *context, unsigned short state)
Willy Tarreaubaaee002006-06-26 02:48:02 +02002182{
Olivier Houchard9f6af332018-05-25 14:04:04 +02002183 struct check *check = context;
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002184 struct proxy *proxy = check->proxy;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002185 struct conn_stream *cs = check->cs;
2186 struct connection *conn = cs_conn(cs);
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002187 int rv;
Willy Tarreaufb56aab2012-09-28 14:40:02 +02002188 int ret;
Willy Tarreauacbdc7a2012-11-23 14:02:10 +01002189 int expired = tick_is_expired(t->expire, now_ms);
Willy Tarreaubaaee002006-06-26 02:48:02 +02002190
Olivier Houchard0923fa42019-01-11 18:43:04 +01002191 if (check->server)
2192 HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock);
Willy Tarreau2c115e52013-12-11 19:41:16 +01002193 if (!(check->state & CHK_ST_INPROGRESS)) {
Willy Tarreau5a78f362012-11-23 12:47:05 +01002194 /* no check currently running */
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002195 if (!expired) /* woke up too early */
2196 goto out_unlock;
Willy Tarreaubaaee002006-06-26 02:48:02 +02002197
Simon Horman671b6f02013-11-25 10:46:39 +09002198 /* we don't send any health-checks when the proxy is
2199 * stopped, the server should not be checked or the check
2200 * is disabled.
Willy Tarreaubaaee002006-06-26 02:48:02 +02002201 */
Willy Tarreau0d924cc2013-12-11 21:26:24 +01002202 if (((check->state & (CHK_ST_ENABLED | CHK_ST_PAUSED)) != CHK_ST_ENABLED) ||
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002203 proxy->state == PR_STSTOPPED)
Willy Tarreau5a78f362012-11-23 12:47:05 +01002204 goto reschedule;
Willy Tarreaubaaee002006-06-26 02:48:02 +02002205
2206 /* we'll initiate a new check */
Simon Horman4a741432013-02-23 15:35:38 +09002207 set_server_check_status(check, HCHK_STATUS_START, NULL);
Willy Tarreau1ae1b7b2012-09-28 15:28:30 +02002208
Willy Tarreau2c115e52013-12-11 19:41:16 +01002209 check->state |= CHK_ST_INPROGRESS;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002210 b_reset(&check->bi);
2211 b_reset(&check->bo);
Willy Tarreau1ae1b7b2012-09-28 15:28:30 +02002212
Simon Hormandbf70192015-01-30 11:22:53 +09002213 ret = connect_conn_chk(t);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002214 cs = check->cs;
2215 conn = cs_conn(cs);
Willy Tarreau00149122017-10-04 18:05:01 +02002216
Willy Tarreaufb56aab2012-09-28 14:40:02 +02002217 switch (ret) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02002218 case SF_ERR_UP:
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002219 goto out_unlock;
2220
Willy Tarreaue7dff022015-04-03 01:14:29 +02002221 case SF_ERR_NONE:
Willy Tarreaufb56aab2012-09-28 14:40:02 +02002222 /* we allow up to min(inter, timeout.connect) for a connection
2223 * to establish but only when timeout.check is set
2224 * as it may be to short for a full check otherwise
2225 */
Simon Horman4a741432013-02-23 15:35:38 +09002226 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +02002227
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002228 if (proxy->timeout.check && proxy->timeout.connect) {
2229 int t_con = tick_add(now_ms, proxy->timeout.connect);
Willy Tarreaufb56aab2012-09-28 14:40:02 +02002230 t->expire = tick_first(t->expire, t_con);
Willy Tarreaubaaee002006-06-26 02:48:02 +02002231 }
Willy Tarreau06559ac2013-12-05 01:53:08 +01002232
Olivier Houchard53216e72018-10-10 15:46:36 +02002233 if (check->type)
Olivier Houchardaf4021e2018-08-09 13:06:55 +02002234 __event_srv_chk_r(cs);
Willy Tarreau06559ac2013-12-05 01:53:08 +01002235
Christopher Faulet88ce5d12017-10-20 15:41:18 +02002236 task_set_affinity(t, tid_bit);
Willy Tarreau5a78f362012-11-23 12:47:05 +01002237 goto reschedule;
2238
Willy Tarreaue7dff022015-04-03 01:14:29 +02002239 case SF_ERR_SRVTO: /* ETIMEDOUT */
2240 case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */
Willy Tarreau00149122017-10-04 18:05:01 +02002241 if (conn)
2242 conn->flags |= CO_FL_ERROR;
Willy Tarreaub5259bf2017-10-04 14:47:29 +02002243 chk_report_conn_err(check, errno, 0);
Willy Tarreau5a78f362012-11-23 12:47:05 +01002244 break;
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02002245 /* should share same code than cases below */
2246 case SF_ERR_CHK_PORT:
2247 check->state |= CHK_ST_PORT_MISS;
Willy Tarreaue7dff022015-04-03 01:14:29 +02002248 case SF_ERR_PRXCOND:
2249 case SF_ERR_RESOURCE:
2250 case SF_ERR_INTERNAL:
Willy Tarreau00149122017-10-04 18:05:01 +02002251 if (conn)
2252 conn->flags |= CO_FL_ERROR;
2253 chk_report_conn_err(check, conn ? 0 : ENOMEM, 0);
Willy Tarreau5a78f362012-11-23 12:47:05 +01002254 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +02002255 }
2256
Willy Tarreau5a78f362012-11-23 12:47:05 +01002257 /* here, we have seen a synchronous error, no fd was allocated */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002258 if (cs) {
Olivier Houchard49065542019-05-31 19:20:36 +02002259 if (check->wait_list.events)
2260 cs->conn->xprt->unsubscribe(cs->conn,
2261 cs->conn->xprt_ctx,
2262 check->wait_list.events,
2263 &check->wait_list);
2264 /* We may have been scheduled to run, and the
2265 * I/O handler expects to have a cs, so remove
2266 * the tasklet
2267 */
Willy Tarreau86eded62019-06-14 14:47:49 +02002268 tasklet_remove_from_tasklet_list(check->wait_list.tasklet);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002269 cs_destroy(cs);
2270 cs = check->cs = NULL;
2271 conn = NULL;
Olivier Houchard390485a2017-10-24 19:03:30 +02002272 }
Willy Tarreau6b0a8502012-11-23 08:51:32 +01002273
Willy Tarreau2c115e52013-12-11 19:41:16 +01002274 check->state &= ~CHK_ST_INPROGRESS;
Willy Tarreau4eec5472014-05-20 22:32:27 +02002275 check_notify_failure(check);
Willy Tarreaubaaee002006-06-26 02:48:02 +02002276
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +01002277 /* we allow up to min(inter, timeout.connect) for a connection
2278 * to establish but only when timeout.check is set
2279 * as it may be to short for a full check otherwise
2280 */
Willy Tarreau0c303ee2008-07-07 00:09:58 +02002281 while (tick_is_expired(t->expire, now_ms)) {
2282 int t_con;
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +01002283
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002284 t_con = tick_add(t->expire, proxy->timeout.connect);
Simon Horman4a741432013-02-23 15:35:38 +09002285 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +01002286
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002287 if (proxy->timeout.check)
Willy Tarreau0c303ee2008-07-07 00:09:58 +02002288 t->expire = tick_first(t->expire, t_con);
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +01002289 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02002290 }
2291 else {
Willy Tarreauf1503172012-09-28 19:39:36 +02002292 /* there was a test running.
2293 * First, let's check whether there was an uncaught error,
2294 * which can happen on connect timeout or error.
2295 */
Simon Hormanccaabcd2014-06-20 12:29:47 +09002296 if (check->result == CHK_RES_UNKNOWN) {
Willy Tarreau25e2ab52013-12-04 11:17:05 +01002297 /* good connection is enough for pure TCP check */
2298 if ((conn->flags & CO_FL_CONNECTED) && !check->type) {
Simon Horman4a741432013-02-23 15:35:38 +09002299 if (check->use_ssl)
2300 set_server_check_status(check, HCHK_STATUS_L6OK, NULL);
Willy Tarreauf1503172012-09-28 19:39:36 +02002301 else
Simon Horman4a741432013-02-23 15:35:38 +09002302 set_server_check_status(check, HCHK_STATUS_L4OK, NULL);
Willy Tarreauacbdc7a2012-11-23 14:02:10 +01002303 }
Willy Tarreau4ff3b892017-10-16 15:17:17 +02002304 else if ((conn->flags & CO_FL_ERROR) || cs->flags & CS_FL_ERROR || expired) {
Willy Tarreaub5259bf2017-10-04 14:47:29 +02002305 chk_report_conn_err(check, 0, expired);
Willy Tarreauf1503172012-09-28 19:39:36 +02002306 }
Willy Tarreau74fa7fb2012-11-23 14:43:49 +01002307 else
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002308 goto out_unlock; /* timeout not reached, wait again */
Willy Tarreauf1503172012-09-28 19:39:36 +02002309 }
2310
Willy Tarreau74fa7fb2012-11-23 14:43:49 +01002311 /* check complete or aborted */
Willy Tarreau00149122017-10-04 18:05:01 +02002312 if (conn && conn->xprt) {
Willy Tarreau5ba04f62013-02-12 15:23:12 +01002313 /* The check was aborted and the connection was not yet closed.
2314 * This can happen upon timeout, or when an external event such
2315 * as a failed response coupled with "observe layer7" caused the
2316 * server state to be suddenly changed.
2317 */
Willy Tarreaud85c4852015-03-13 00:40:28 +01002318 conn_sock_drain(conn);
Willy Tarreaua553ae92017-10-05 18:52:17 +02002319 cs_close(cs);
Willy Tarreau5ba04f62013-02-12 15:23:12 +01002320 }
2321
Willy Tarreauac59f362017-10-08 11:10:19 +02002322 if (cs) {
Olivier Houchard49065542019-05-31 19:20:36 +02002323 if (check->wait_list.events)
2324 cs->conn->xprt->unsubscribe(cs->conn,
2325 cs->conn->xprt_ctx,
2326 check->wait_list.events,
2327 &check->wait_list);
2328 /* We may have been scheduled to run, and the
Willy Tarreau86eded62019-06-14 14:47:49 +02002329 * I/O handler expects to have a cs, so remove
2330 * the tasklet
2331 */
2332 tasklet_remove_from_tasklet_list(check->wait_list.tasklet);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002333 cs_destroy(cs);
2334 cs = check->cs = NULL;
2335 conn = NULL;
Willy Tarreau00149122017-10-04 18:05:01 +02002336 }
2337
Olivier Houchard0923fa42019-01-11 18:43:04 +01002338 if (check->server) {
2339 if (check->result == CHK_RES_FAILED) {
2340 /* a failure or timeout detected */
2341 check_notify_failure(check);
2342 }
2343 else if (check->result == CHK_RES_CONDPASS) {
2344 /* check is OK but asks for stopping mode */
2345 check_notify_stopping(check);
2346 }
2347 else if (check->result == CHK_RES_PASSED) {
2348 /* a success was detected */
2349 check_notify_success(check);
2350 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02002351 }
Christopher Faulet88ce5d12017-10-20 15:41:18 +02002352 task_set_affinity(t, MAX_THREADS_MASK);
Willy Tarreau2c115e52013-12-11 19:41:16 +01002353 check->state &= ~CHK_ST_INPROGRESS;
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002354
Olivier Houchard0923fa42019-01-11 18:43:04 +01002355 if (check->server) {
2356 rv = 0;
2357 if (global.spread_checks > 0) {
2358 rv = srv_getinter(check) * global.spread_checks / 100;
2359 rv -= (int) (2 * rv * (rand() / (RAND_MAX + 1.0)));
2360 }
2361 t->expire = tick_add(now_ms, MS_TO_TICKS(srv_getinter(check) + rv));
Willy Tarreaubaaee002006-06-26 02:48:02 +02002362 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02002363 }
Willy Tarreau5a78f362012-11-23 12:47:05 +01002364
2365 reschedule:
2366 while (tick_is_expired(t->expire, now_ms))
Simon Horman4a741432013-02-23 15:35:38 +09002367 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002368 out_unlock:
Olivier Houchard0923fa42019-01-11 18:43:04 +01002369 if (check->server)
2370 HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock);
Willy Tarreau26c25062009-03-08 09:38:41 +01002371 return t;
Willy Tarreaubaaee002006-06-26 02:48:02 +02002372}
2373
Simon Horman98637e52014-06-20 12:30:16 +09002374/*
2375 * manages a server health-check. Returns
2376 * the time the task accepts to wait, or TIME_ETERNITY for infinity.
2377 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02002378static struct task *process_chk(struct task *t, void *context, unsigned short state)
Simon Horman98637e52014-06-20 12:30:16 +09002379{
Olivier Houchard9f6af332018-05-25 14:04:04 +02002380 struct check *check = context;
Simon Horman98637e52014-06-20 12:30:16 +09002381
2382 if (check->type == PR_O2_EXT_CHK)
Olivier Houchard9f6af332018-05-25 14:04:04 +02002383 return process_chk_proc(t, context, state);
2384 return process_chk_conn(t, context, state);
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002385
Simon Horman98637e52014-06-20 12:30:16 +09002386}
2387
Simon Horman5c942422013-11-25 10:46:32 +09002388static int start_check_task(struct check *check, int mininter,
2389 int nbcheck, int srvpos)
2390{
2391 struct task *t;
2392 /* task for the check */
Emeric Brunc60def82017-09-27 14:59:38 +02002393 if ((t = task_new(MAX_THREADS_MASK)) == NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002394 ha_alert("Starting [%s:%s] check: out of memory.\n",
2395 check->server->proxy->id, check->server->id);
Simon Horman5c942422013-11-25 10:46:32 +09002396 return 0;
2397 }
2398
2399 check->task = t;
2400 t->process = process_chk;
2401 t->context = check;
2402
Willy Tarreau1746eec2014-04-25 10:46:47 +02002403 if (mininter < srv_getinter(check))
2404 mininter = srv_getinter(check);
2405
2406 if (global.max_spread_checks && mininter > global.max_spread_checks)
2407 mininter = global.max_spread_checks;
2408
Simon Horman5c942422013-11-25 10:46:32 +09002409 /* check this every ms */
Willy Tarreau1746eec2014-04-25 10:46:47 +02002410 t->expire = tick_add(now_ms, MS_TO_TICKS(mininter * srvpos / nbcheck));
Simon Horman5c942422013-11-25 10:46:32 +09002411 check->start = now;
2412 task_queue(t);
2413
2414 return 1;
2415}
2416
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002417/*
2418 * Start health-check.
Willy Tarreau865c5142016-12-21 20:04:48 +01002419 * Returns 0 if OK, ERR_FATAL on error, and prints the error in this case.
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002420 */
Willy Tarreau865c5142016-12-21 20:04:48 +01002421static int start_checks()
2422{
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002423
2424 struct proxy *px;
2425 struct server *s;
2426 struct task *t;
Simon Horman4a741432013-02-23 15:35:38 +09002427 int nbcheck=0, mininter=0, srvpos=0;
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002428
Willy Tarreau2c43a1e2007-10-14 23:05:39 +02002429 /* 1- count the checkers to run simultaneously.
2430 * We also determine the minimum interval among all of those which
2431 * have an interval larger than SRV_CHK_INTER_THRES. This interval
2432 * will be used to spread their start-up date. Those which have
Jamie Gloudon801a0a32012-08-25 00:18:33 -04002433 * a shorter interval will start independently and will not dictate
Willy Tarreau2c43a1e2007-10-14 23:05:39 +02002434 * too short an interval for all others.
2435 */
Olivier Houchardfbc74e82017-11-24 16:54:05 +01002436 for (px = proxies_list; px; px = px->next) {
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002437 for (s = px->srv; s; s = s->next) {
Willy Tarreaue7b73482013-11-21 11:50:50 +01002438 if (s->slowstart) {
Emeric Brunc60def82017-09-27 14:59:38 +02002439 if ((t = task_new(MAX_THREADS_MASK)) == NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002440 ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id);
Willy Tarreau865c5142016-12-21 20:04:48 +01002441 return ERR_ALERT | ERR_FATAL;
Willy Tarreaue7b73482013-11-21 11:50:50 +01002442 }
2443 /* We need a warmup task that will be called when the server
2444 * state switches from down to up.
2445 */
2446 s->warmup = t;
2447 t->process = server_warmup;
2448 t->context = s;
Baptiste Assmann6076d1c2015-09-17 22:53:59 +02002449 /* server can be in this state only because of */
Emeric Brun52a91d32017-08-31 14:41:55 +02002450 if (s->next_state == SRV_ST_STARTING)
Baptiste Assmann6076d1c2015-09-17 22:53:59 +02002451 task_schedule(s->warmup, tick_add(now_ms, MS_TO_TICKS(MAX(1000, (now.tv_sec - s->last_change)) / 20)));
Willy Tarreaue7b73482013-11-21 11:50:50 +01002452 }
2453
Willy Tarreaud8514a22013-12-11 21:10:14 +01002454 if (s->check.state & CHK_ST_CONFIGURED) {
2455 nbcheck++;
2456 if ((srv_getinter(&s->check) >= SRV_CHK_INTER_THRES) &&
2457 (!mininter || mininter > srv_getinter(&s->check)))
2458 mininter = srv_getinter(&s->check);
2459 }
Willy Tarreau15f39102013-12-11 20:41:18 +01002460
Willy Tarreaud8514a22013-12-11 21:10:14 +01002461 if (s->agent.state & CHK_ST_CONFIGURED) {
2462 nbcheck++;
2463 if ((srv_getinter(&s->agent) >= SRV_CHK_INTER_THRES) &&
2464 (!mininter || mininter > srv_getinter(&s->agent)))
2465 mininter = srv_getinter(&s->agent);
2466 }
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002467 }
2468 }
2469
Simon Horman4a741432013-02-23 15:35:38 +09002470 if (!nbcheck)
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002471 return 0;
2472
2473 srand((unsigned)time(NULL));
2474
2475 /*
2476 * 2- start them as far as possible from each others. For this, we will
2477 * start them after their interval set to the min interval divided by
2478 * the number of servers, weighted by the server's position in the list.
2479 */
Olivier Houchardfbc74e82017-11-24 16:54:05 +01002480 for (px = proxies_list; px; px = px->next) {
Simon Horman98637e52014-06-20 12:30:16 +09002481 if ((px->options2 & PR_O2_CHK_ANY) == PR_O2_EXT_CHK) {
2482 if (init_pid_list()) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002483 ha_alert("Starting [%s] check: out of memory.\n", px->id);
Willy Tarreau865c5142016-12-21 20:04:48 +01002484 return ERR_ALERT | ERR_FATAL;
Simon Horman98637e52014-06-20 12:30:16 +09002485 }
2486 }
2487
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002488 for (s = px->srv; s; s = s->next) {
Simon Hormand60d6912013-11-25 10:46:36 +09002489 /* A task for the main check */
Willy Tarreauff5ae352013-12-11 20:36:34 +01002490 if (s->check.state & CHK_ST_CONFIGURED) {
Cyril Bonté99c5bf52014-08-07 01:55:38 +02002491 if (s->check.type == PR_O2_EXT_CHK) {
2492 if (!prepare_external_check(&s->check))
Willy Tarreau865c5142016-12-21 20:04:48 +01002493 return ERR_ALERT | ERR_FATAL;
Cyril Bonté99c5bf52014-08-07 01:55:38 +02002494 }
Simon Hormand60d6912013-11-25 10:46:36 +09002495 if (!start_check_task(&s->check, mininter, nbcheck, srvpos))
Willy Tarreau865c5142016-12-21 20:04:48 +01002496 return ERR_ALERT | ERR_FATAL;
Simon Hormand60d6912013-11-25 10:46:36 +09002497 srvpos++;
2498 }
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002499
Simon Hormand60d6912013-11-25 10:46:36 +09002500 /* A task for a auxiliary agent check */
Willy Tarreauff5ae352013-12-11 20:36:34 +01002501 if (s->agent.state & CHK_ST_CONFIGURED) {
Simon Hormand60d6912013-11-25 10:46:36 +09002502 if (!start_check_task(&s->agent, mininter, nbcheck, srvpos)) {
Willy Tarreau865c5142016-12-21 20:04:48 +01002503 return ERR_ALERT | ERR_FATAL;
Simon Hormand60d6912013-11-25 10:46:36 +09002504 }
2505 srvpos++;
2506 }
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002507 }
2508 }
2509 return 0;
2510}
Willy Tarreaubaaee002006-06-26 02:48:02 +02002511
2512/*
Willy Tarreau5b3a2022012-09-28 15:01:02 +02002513 * Perform content verification check on data in s->check.buffer buffer.
Willy Tarreaubd741542010-03-16 18:46:54 +01002514 * The buffer MUST be terminated by a null byte before calling this function.
2515 * Sets server status appropriately. The caller is responsible for ensuring
2516 * that the buffer contains at least 13 characters. If <done> is zero, we may
2517 * return 0 to indicate that data is required to decide of a match.
2518 */
2519static int httpchk_expect(struct server *s, int done)
2520{
Christopher Faulet1bc04c72017-10-29 20:14:08 +01002521 static THREAD_LOCAL char status_msg[] = "HTTP status check returned code <000>";
Willy Tarreaubd741542010-03-16 18:46:54 +01002522 char status_code[] = "000";
2523 char *contentptr;
2524 int crlf;
2525 int ret;
2526
2527 switch (s->proxy->options2 & PR_O2_EXP_TYPE) {
2528 case PR_O2_EXP_STS:
2529 case PR_O2_EXP_RSTS:
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002530 memcpy(status_code, b_head(&s->check.bi) + 9, 3);
2531 memcpy(status_msg + strlen(status_msg) - 4, b_head(&s->check.bi) + 9, 3);
Willy Tarreaubd741542010-03-16 18:46:54 +01002532
2533 if ((s->proxy->options2 & PR_O2_EXP_TYPE) == PR_O2_EXP_STS)
2534 ret = strncmp(s->proxy->expect_str, status_code, 3) == 0;
2535 else
Thierry FOURNIER09af0d62014-06-18 11:35:54 +02002536 ret = regex_exec(s->proxy->expect_regex, status_code);
Willy Tarreaubd741542010-03-16 18:46:54 +01002537
2538 /* we necessarily have the response, so there are no partial failures */
2539 if (s->proxy->options2 & PR_O2_EXP_INV)
2540 ret = !ret;
2541
Simon Horman4a741432013-02-23 15:35:38 +09002542 set_server_check_status(&s->check, ret ? HCHK_STATUS_L7OKD : HCHK_STATUS_L7STS, status_msg);
Willy Tarreaubd741542010-03-16 18:46:54 +01002543 break;
2544
2545 case PR_O2_EXP_STR:
2546 case PR_O2_EXP_RSTR:
2547 /* very simple response parser: ignore CR and only count consecutive LFs,
2548 * stop with contentptr pointing to first char after the double CRLF or
2549 * to '\0' if crlf < 2.
2550 */
2551 crlf = 0;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002552 for (contentptr = b_head(&s->check.bi); *contentptr; contentptr++) {
Willy Tarreaubd741542010-03-16 18:46:54 +01002553 if (crlf >= 2)
2554 break;
2555 if (*contentptr == '\r')
2556 continue;
2557 else if (*contentptr == '\n')
2558 crlf++;
2559 else
2560 crlf = 0;
2561 }
2562
2563 /* Check that response contains a body... */
2564 if (crlf < 2) {
2565 if (!done)
2566 return 0;
2567
Simon Horman4a741432013-02-23 15:35:38 +09002568 set_server_check_status(&s->check, HCHK_STATUS_L7RSP,
Willy Tarreaubd741542010-03-16 18:46:54 +01002569 "HTTP content check could not find a response body");
2570 return 1;
2571 }
2572
2573 /* Check that response body is not empty... */
2574 if (*contentptr == '\0') {
Willy Tarreaua164fb52011-04-13 09:32:41 +02002575 if (!done)
2576 return 0;
2577
Simon Horman4a741432013-02-23 15:35:38 +09002578 set_server_check_status(&s->check, HCHK_STATUS_L7RSP,
Willy Tarreaubd741542010-03-16 18:46:54 +01002579 "HTTP content check found empty response body");
2580 return 1;
2581 }
2582
2583 /* Check the response content against the supplied string
2584 * or regex... */
2585 if ((s->proxy->options2 & PR_O2_EXP_TYPE) == PR_O2_EXP_STR)
2586 ret = strstr(contentptr, s->proxy->expect_str) != NULL;
2587 else
Thierry FOURNIER09af0d62014-06-18 11:35:54 +02002588 ret = regex_exec(s->proxy->expect_regex, contentptr);
Willy Tarreaubd741542010-03-16 18:46:54 +01002589
2590 /* if we don't match, we may need to wait more */
2591 if (!ret && !done)
2592 return 0;
2593
2594 if (ret) {
2595 /* content matched */
2596 if (s->proxy->options2 & PR_O2_EXP_INV)
Simon Horman4a741432013-02-23 15:35:38 +09002597 set_server_check_status(&s->check, HCHK_STATUS_L7RSP,
Willy Tarreaubd741542010-03-16 18:46:54 +01002598 "HTTP check matched unwanted content");
2599 else
Simon Horman4a741432013-02-23 15:35:38 +09002600 set_server_check_status(&s->check, HCHK_STATUS_L7OKD,
Willy Tarreaubd741542010-03-16 18:46:54 +01002601 "HTTP content check matched");
2602 }
2603 else {
2604 if (s->proxy->options2 & PR_O2_EXP_INV)
Simon Horman4a741432013-02-23 15:35:38 +09002605 set_server_check_status(&s->check, HCHK_STATUS_L7OKD,
Willy Tarreaubd741542010-03-16 18:46:54 +01002606 "HTTP check did not match unwanted content");
2607 else
Simon Horman4a741432013-02-23 15:35:38 +09002608 set_server_check_status(&s->check, HCHK_STATUS_L7RSP,
Willy Tarreaubd741542010-03-16 18:46:54 +01002609 "HTTP content check did not match");
2610 }
2611 break;
2612 }
2613 return 1;
2614}
2615
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002616/*
2617 * return the id of a step in a send/expect session
2618 */
Simon Hormane16c1b32015-01-30 11:22:57 +09002619static int tcpcheck_get_step_id(struct check *check)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002620{
2621 struct tcpcheck_rule *cur = NULL, *next = NULL;
2622 int i = 0;
2623
Willy Tarreau213c6782014-10-02 14:51:02 +02002624 /* not even started anything yet => step 0 = initial connect */
Baptiste Assmannf95bc8e2015-04-25 16:03:06 +02002625 if (!check->current_step)
Willy Tarreau213c6782014-10-02 14:51:02 +02002626 return 0;
2627
Simon Hormane16c1b32015-01-30 11:22:57 +09002628 cur = check->last_started_step;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002629
2630 /* no step => first step */
2631 if (cur == NULL)
2632 return 1;
2633
2634 /* increment i until current step */
Simon Hormane16c1b32015-01-30 11:22:57 +09002635 list_for_each_entry(next, check->tcpcheck_rules, list) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002636 if (next->list.p == &cur->list)
2637 break;
2638 ++i;
2639 }
2640
2641 return i;
2642}
2643
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002644/*
2645 * return the latest known comment before (including) the given stepid
2646 * returns NULL if no comment found
2647 */
2648static char * tcpcheck_get_step_comment(struct check *check, int stepid)
2649{
2650 struct tcpcheck_rule *cur = NULL;
2651 char *ret = NULL;
2652 int i = 0;
2653
2654 /* not even started anything yet, return latest comment found before any action */
2655 if (!check->current_step) {
2656 list_for_each_entry(cur, check->tcpcheck_rules, list) {
2657 if (cur->action == TCPCHK_ACT_COMMENT)
2658 ret = cur->comment;
2659 else
2660 goto return_comment;
2661 }
2662 }
2663
2664 i = 1;
2665 list_for_each_entry(cur, check->tcpcheck_rules, list) {
2666 if (cur->comment)
2667 ret = cur->comment;
2668
2669 if (i >= stepid)
2670 goto return_comment;
2671
2672 ++i;
2673 }
2674
2675 return_comment:
2676 return ret;
2677}
2678
Willy Tarreaube74b882017-10-04 16:22:49 +02002679/* proceed with next steps for the TCP checks <check>. Note that this is called
2680 * both from the connection's wake() callback and from the check scheduling task.
Willy Tarreau6bdcab02017-10-04 18:41:00 +02002681 * It returns 0 on normal cases, or <0 if a close() has happened on an existing
2682 * connection, presenting the risk of an fd replacement.
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002683 *
2684 * Please do NOT place any return statement in this function and only leave
2685 * via the out_unlock label after setting retcode.
Willy Tarreaube74b882017-10-04 16:22:49 +02002686 */
Willy Tarreau6bdcab02017-10-04 18:41:00 +02002687static int tcpcheck_main(struct check *check)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002688{
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002689 char *contentptr, *comment;
Willy Tarreauce8c42a2015-05-13 11:23:01 +02002690 struct tcpcheck_rule *next;
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02002691 int done = 0, ret = 0, step = 0;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002692 struct conn_stream *cs = check->cs;
2693 struct connection *conn = cs_conn(cs);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002694 struct server *s = check->server;
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002695 struct proxy *proxy = check->proxy;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002696 struct task *t = check->task;
Simon Hormane16c1b32015-01-30 11:22:57 +09002697 struct list *head = check->tcpcheck_rules;
Willy Tarreau6bdcab02017-10-04 18:41:00 +02002698 int retcode = 0;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002699
Willy Tarreauef953952014-10-02 14:30:14 +02002700 /* here, we know that the check is complete or that it failed */
2701 if (check->result != CHK_RES_UNKNOWN)
2702 goto out_end_tcpcheck;
2703
2704 /* We have 4 possibilities here :
2705 * 1. we've not yet attempted step 1, and step 1 is a connect, so no
Willy Tarreau00149122017-10-04 18:05:01 +02002706 * connection attempt was made yet ; conn==NULL;current_step==NULL.
Willy Tarreauef953952014-10-02 14:30:14 +02002707 * 2. we've not yet attempted step 1, and step 1 is a not connect or
2708 * does not exist (no rule), so a connection attempt was made
Willy Tarreau00149122017-10-04 18:05:01 +02002709 * before coming here, conn!=NULL.
Willy Tarreauef953952014-10-02 14:30:14 +02002710 * 3. we're coming back after having started with step 1, so we may
Willy Tarreau00149122017-10-04 18:05:01 +02002711 * be waiting for a connection attempt to complete. conn!=NULL.
2712 * 4. the connection + handshake are complete. conn!=NULL.
Willy Tarreauef953952014-10-02 14:30:14 +02002713 *
2714 * #2 and #3 are quite similar, we want both the connection and the
2715 * handshake to complete before going any further. Thus we must always
2716 * wait for a connection to complete unless we're before and existing
2717 * step 1.
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002718 */
Willy Tarreau449f9522015-05-13 15:39:48 +02002719
2720 /* find first rule and skip comments */
2721 next = LIST_NEXT(head, struct tcpcheck_rule *, list);
2722 while (&next->list != head && next->action == TCPCHK_ACT_COMMENT)
2723 next = LIST_NEXT(&next->list, struct tcpcheck_rule *, list);
2724
Willy Tarreau00149122017-10-04 18:05:01 +02002725 if ((check->current_step || &next->list == head) &&
2726 (!(conn->flags & CO_FL_CONNECTED) || (conn->flags & CO_FL_HANDSHAKE))) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002727 /* we allow up to min(inter, timeout.connect) for a connection
2728 * to establish but only when timeout.check is set
2729 * as it may be to short for a full check otherwise
2730 */
2731 while (tick_is_expired(t->expire, now_ms)) {
2732 int t_con;
2733
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002734 t_con = tick_add(t->expire, proxy->timeout.connect);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002735 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
2736
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002737 if (proxy->timeout.check)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002738 t->expire = tick_first(t->expire, t_con);
2739 }
Christopher Fauletb6102852017-11-28 10:06:29 +01002740 goto out;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002741 }
2742
Willy Tarreauef953952014-10-02 14:30:14 +02002743 /* special case: option tcp-check with no rule, a connect is enough */
Willy Tarreau449f9522015-05-13 15:39:48 +02002744 if (&next->list == head) {
Willy Tarreauef953952014-10-02 14:30:14 +02002745 set_server_check_status(check, HCHK_STATUS_L4OK, NULL);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002746 goto out_end_tcpcheck;
Willy Tarreauef953952014-10-02 14:30:14 +02002747 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002748
Willy Tarreau213c6782014-10-02 14:51:02 +02002749 /* no step means first step initialisation */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002750 if (check->current_step == NULL) {
Willy Tarreau213c6782014-10-02 14:51:02 +02002751 check->last_started_step = NULL;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002752 b_reset(&check->bo);
2753 b_reset(&check->bi);
Willy Tarreau449f9522015-05-13 15:39:48 +02002754 check->current_step = next;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002755 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002756 if (proxy->timeout.check)
2757 t->expire = tick_add_ifset(now_ms, proxy->timeout.check);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002758 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002759
Willy Tarreauabca5b62013-12-06 14:19:25 +01002760 while (1) {
Willy Tarreau263013d2015-05-13 11:59:14 +02002761 /* We have to try to flush the output buffer before reading, at
2762 * the end, or if we're about to send a string that does not fit
2763 * in the remaining space. That explains why we break out of the
Willy Tarreau00149122017-10-04 18:05:01 +02002764 * loop after this control. If we have data, conn is valid.
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002765 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002766 if (b_data(&check->bo) &&
Willy Tarreauce8c42a2015-05-13 11:23:01 +02002767 (&check->current_step->list == head ||
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002768 check->current_step->action != TCPCHK_ACT_SEND ||
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002769 check->current_step->string_len >= b_room(&check->bo))) {
Willy Tarreaudeccd112018-06-14 18:38:55 +02002770 int ret;
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002771
Olivier Houcharded0f2072018-08-16 15:41:52 +02002772 ret = cs->conn->mux->snd_buf(cs, &check->bo, b_data(&check->bo), 0);
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002773 b_realign_if_empty(&check->bo);
Willy Tarreaudeccd112018-06-14 18:38:55 +02002774
2775 if (ret <= 0) {
Willy Tarreau4ff3b892017-10-16 15:17:17 +02002776 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) {
Willy Tarreaub5259bf2017-10-04 14:47:29 +02002777 chk_report_conn_err(check, errno, 0);
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002778 goto out_end_tcpcheck;
2779 }
Willy Tarreau263013d2015-05-13 11:59:14 +02002780 break;
Willy Tarreauabca5b62013-12-06 14:19:25 +01002781 }
Olivier Houchard4501c3e2018-08-28 19:36:18 +02002782 if (b_data(&check->bo)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01002783 cs->conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
Olivier Houchard4501c3e2018-08-28 19:36:18 +02002784 goto out;
2785 }
Willy Tarreauabca5b62013-12-06 14:19:25 +01002786 }
2787
Willy Tarreau263013d2015-05-13 11:59:14 +02002788 if (&check->current_step->list == head)
Willy Tarreauabca5b62013-12-06 14:19:25 +01002789 break;
2790
Willy Tarreauce8c42a2015-05-13 11:23:01 +02002791 /* have 'next' point to the next rule or NULL if we're on the
2792 * last one, connect() needs this.
2793 */
Willy Tarreau5581c272015-05-13 12:24:53 +02002794 next = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002795
2796 /* bypass all comment rules */
Willy Tarreauf2c87352015-05-13 12:08:21 +02002797 while (&next->list != head && next->action == TCPCHK_ACT_COMMENT)
Willy Tarreau5581c272015-05-13 12:24:53 +02002798 next = LIST_NEXT(&next->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002799
2800 /* NULL if we're on the last rule */
Willy Tarreauf3d34822014-12-08 12:11:28 +01002801 if (&next->list == head)
2802 next = NULL;
2803
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002804 if (check->current_step->action == TCPCHK_ACT_CONNECT) {
2805 struct protocol *proto;
2806 struct xprt_ops *xprt;
2807
Willy Tarreau00149122017-10-04 18:05:01 +02002808 /* For a connect action we'll create a new connection.
2809 * We may also have to kill a previous one. But we don't
2810 * want to leave *without* a connection if we came here
2811 * from the connection layer, hence with a connection.
2812 * Thus we'll proceed in the following order :
2813 * 1: close but not release previous connection
2814 * 2: try to get a new connection
2815 * 3: release and replace the old one on success
2816 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002817 if (check->cs) {
Willy Tarreaua553ae92017-10-05 18:52:17 +02002818 cs_close(check->cs);
2819 retcode = -1; /* do not reuse the fd in the caller! */
Willy Tarreau00149122017-10-04 18:05:01 +02002820 }
2821
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002822 /* mark the step as started */
2823 check->last_started_step = check->current_step;
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002824
2825 /* prepare new connection */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002826 cs = cs_new(NULL);
2827 if (!cs) {
Willy Tarreau00149122017-10-04 18:05:01 +02002828 step = tcpcheck_get_step_id(check);
2829 chunk_printf(&trash, "TCPCHK error allocating connection at step %d", step);
2830 comment = tcpcheck_get_step_comment(check, step);
2831 if (comment)
2832 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002833 set_server_check_status(check, HCHK_STATUS_SOCKERR,
2834 trash.area);
Willy Tarreau00149122017-10-04 18:05:01 +02002835 check->current_step = NULL;
Christopher Fauletb6102852017-11-28 10:06:29 +01002836 goto out;
Willy Tarreau00149122017-10-04 18:05:01 +02002837 }
2838
Olivier Houchard49065542019-05-31 19:20:36 +02002839 if (check->cs) {
2840 if (check->wait_list.events)
2841 cs->conn->xprt->unsubscribe(cs->conn,
2842 cs->conn->xprt_ctx,
2843 check->wait_list.events,
2844 &check->wait_list);
Willy Tarreau86eded62019-06-14 14:47:49 +02002845 /* We may have been scheduled to run, and the
2846 * I/O handler expects to have a cs, so remove
2847 * the tasklet
2848 */
2849 tasklet_remove_from_tasklet_list(check->wait_list.tasklet);
Willy Tarreauac59f362017-10-08 11:10:19 +02002850 cs_destroy(check->cs);
Olivier Houchard49065542019-05-31 19:20:36 +02002851 }
Willy Tarreau00149122017-10-04 18:05:01 +02002852
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002853 check->cs = cs;
2854 conn = cs->conn;
Olivier Houchard26e1a8f2018-09-12 15:15:12 +02002855 /* Maybe there were an older connection we were waiting on */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01002856 check->wait_list.events = 0;
Olivier Houchard0923fa42019-01-11 18:43:04 +01002857 conn->target = s ? &s->obj_type : &proxy->obj_type;
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002858
2859 /* no client address */
2860 clear_addr(&conn->addr.from);
2861
Simon Horman41f58762015-01-30 11:22:56 +09002862 if (is_addr(&check->addr)) {
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002863 /* we'll connect to the check addr specified on the server */
Simon Horman41f58762015-01-30 11:22:56 +09002864 conn->addr.to = check->addr;
Willy Tarreau640556c2014-05-09 23:38:15 +02002865 }
2866 else {
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002867 /* we'll connect to the addr on the server */
2868 conn->addr.to = s->addr;
Willy Tarreau640556c2014-05-09 23:38:15 +02002869 }
Thierry FOURNIERbb2ae642015-01-14 11:31:49 +01002870 proto = protocol_by_family(conn->addr.to.ss_family);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002871
2872 /* port */
2873 if (check->current_step->port)
2874 set_host_port(&conn->addr.to, check->current_step->port);
2875 else if (check->port)
2876 set_host_port(&conn->addr.to, check->port);
Baptiste Assmann2f3a56b2018-03-19 12:22:41 +01002877 else if (s->svc_port)
2878 set_host_port(&conn->addr.to, s->svc_port);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002879
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002880 if (check->current_step->conn_opts & TCPCHK_OPT_SSL) {
Willy Tarreaua261e9b2016-12-22 20:44:00 +01002881 xprt = xprt_get(XPRT_SSL);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002882 }
2883 else {
Willy Tarreaua261e9b2016-12-22 20:44:00 +01002884 xprt = xprt_get(XPRT_RAW);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002885 }
Willy Tarreaube373152018-09-06 11:45:30 +02002886
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002887 conn_prepare(conn, proto, xprt);
Olivier Houchardf67be932019-01-29 15:47:43 +01002888 if (conn_install_mux(conn, &mux_pt_ops, cs, proxy, NULL) < 0)
2889 return SF_ERR_RESOURCE;
Willy Tarreaube373152018-09-06 11:45:30 +02002890 cs_attach(cs, check, &check_conn_cb);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002891
Willy Tarreaue7dff022015-04-03 01:14:29 +02002892 ret = SF_ERR_INTERNAL;
Ricardo Nabinger Sanchez4bccea92019-03-28 21:42:23 -03002893 if (proto && proto->connect)
Willy Tarreauf3d34822014-12-08 12:11:28 +01002894 ret = proto->connect(conn,
Olivier Houchardfdcb0072019-05-06 18:32:29 +02002895 CONNECT_HAS_DATA /* I/O polling is always needed */ | (next && next->action == TCPCHK_ACT_EXPECT) ? 0 : CONNECT_DELACK_ALWAYS);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002896 if (check->current_step->conn_opts & TCPCHK_OPT_SEND_PROXY) {
2897 conn->send_proxy_ofs = 1;
2898 conn->flags |= CO_FL_SEND_PROXY;
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02002899 if (xprt_add_hs(conn) < 0)
2900 ret = SF_ERR_RESOURCE;
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002901 }
2902
2903 /* It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02002904 * - SF_ERR_NONE if everything's OK
2905 * - SF_ERR_SRVTO if there are no more servers
2906 * - SF_ERR_SRVCL if the connection was refused by the server
2907 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
2908 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
2909 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +01002910 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002911 * Note that we try to prevent the network stack from sending the ACK during the
2912 * connect() when a pure TCP check is used (without PROXY protocol).
2913 */
2914 switch (ret) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02002915 case SF_ERR_NONE:
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002916 /* we allow up to min(inter, timeout.connect) for a connection
2917 * to establish but only when timeout.check is set
2918 * as it may be to short for a full check otherwise
2919 */
2920 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
2921
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002922 if (proxy->timeout.check && proxy->timeout.connect) {
2923 int t_con = tick_add(now_ms, proxy->timeout.connect);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002924 t->expire = tick_first(t->expire, t_con);
2925 }
2926 break;
Willy Tarreaue7dff022015-04-03 01:14:29 +02002927 case SF_ERR_SRVTO: /* ETIMEDOUT */
2928 case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02002929 step = tcpcheck_get_step_id(check);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002930 chunk_printf(&trash, "TCPCHK error establishing connection at step %d: %s",
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02002931 step, strerror(errno));
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002932 comment = tcpcheck_get_step_comment(check, step);
2933 if (comment)
2934 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002935 set_server_check_status(check, HCHK_STATUS_L4CON,
2936 trash.area);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002937 goto out_end_tcpcheck;
Willy Tarreaue7dff022015-04-03 01:14:29 +02002938 case SF_ERR_PRXCOND:
2939 case SF_ERR_RESOURCE:
2940 case SF_ERR_INTERNAL:
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02002941 step = tcpcheck_get_step_id(check);
2942 chunk_printf(&trash, "TCPCHK error establishing connection at step %d", step);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002943 comment = tcpcheck_get_step_comment(check, step);
2944 if (comment)
2945 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002946 set_server_check_status(check, HCHK_STATUS_SOCKERR,
2947 trash.area);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002948 goto out_end_tcpcheck;
2949 }
2950
2951 /* allow next rule */
Willy Tarreau5581c272015-05-13 12:24:53 +02002952 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002953
2954 /* bypass all comment rules */
Willy Tarreauf2c87352015-05-13 12:08:21 +02002955 while (&check->current_step->list != head &&
2956 check->current_step->action == TCPCHK_ACT_COMMENT)
Willy Tarreau5581c272015-05-13 12:24:53 +02002957 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002958
Willy Tarreauf2c87352015-05-13 12:08:21 +02002959 if (&check->current_step->list == head)
2960 break;
2961
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002962 } /* end 'connect' */
2963 else if (check->current_step->action == TCPCHK_ACT_SEND) {
2964 /* mark the step as started */
2965 check->last_started_step = check->current_step;
2966
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002967 /* reset the read buffer */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002968 if (*b_head(&check->bi) != '\0') {
2969 *b_head(&check->bi) = '\0';
2970 b_reset(&check->bi);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002971 }
2972
Willy Tarreaubbae3f02017-08-30 09:59:52 +02002973 if (conn->flags & CO_FL_SOCK_WR_SH) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002974 conn->flags |= CO_FL_ERROR;
Willy Tarreaub5259bf2017-10-04 14:47:29 +02002975 chk_report_conn_err(check, 0, 0);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002976 goto out_end_tcpcheck;
2977 }
2978
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002979 if (check->current_step->string_len >= b_size(&check->bo)) {
Willy Tarreau506a29a2018-07-18 10:07:58 +02002980 chunk_printf(&trash, "tcp-check send : string too large (%d) for buffer size (%u) at step %d",
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002981 check->current_step->string_len, (unsigned int)b_size(&check->bo),
Simon Hormane16c1b32015-01-30 11:22:57 +09002982 tcpcheck_get_step_id(check));
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002983 set_server_check_status(check, HCHK_STATUS_L7RSP,
2984 trash.area);
Willy Tarreauabca5b62013-12-06 14:19:25 +01002985 goto out_end_tcpcheck;
2986 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002987
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002988 /* do not try to send if there is no space */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002989 if (check->current_step->string_len >= b_room(&check->bo))
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002990 continue;
2991
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002992 b_putblk(&check->bo, check->current_step->string, check->current_step->string_len);
2993 *b_tail(&check->bo) = '\0'; /* to make gdb output easier to read */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002994
Willy Tarreauabca5b62013-12-06 14:19:25 +01002995 /* go to next rule and try to send */
Willy Tarreau5581c272015-05-13 12:24:53 +02002996 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002997
2998 /* bypass all comment rules */
Willy Tarreauf2c87352015-05-13 12:08:21 +02002999 while (&check->current_step->list != head &&
3000 check->current_step->action == TCPCHK_ACT_COMMENT)
Willy Tarreau5581c272015-05-13 12:24:53 +02003001 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Willy Tarreauf2c87352015-05-13 12:08:21 +02003002
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003003 } /* end 'send' */
Willy Tarreau98aec9f2013-12-06 16:16:41 +01003004 else if (check->current_step->action == TCPCHK_ACT_EXPECT) {
Willy Tarreau6aaa1b82013-12-11 17:09:34 +01003005 if (unlikely(check->result == CHK_RES_FAILED))
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003006 goto out_end_tcpcheck;
3007
Olivier Houchard511efea2018-08-16 15:30:32 +02003008 if (cs->conn->mux->rcv_buf(cs, &check->bi, b_size(&check->bi), 0) <= 0) {
Willy Tarreau4ff3b892017-10-16 15:17:17 +02003009 if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) {
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01003010 done = 1;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003011 if ((conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) && !b_data(&check->bi)) {
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01003012 /* Report network errors only if we got no other data. Otherwise
3013 * we'll let the upper layers decide whether the response is OK
3014 * or not. It is very common that an RST sent by the server is
3015 * reported as an error just after the last data chunk.
3016 */
Willy Tarreaub5259bf2017-10-04 14:47:29 +02003017 chk_report_conn_err(check, errno, 0);
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01003018 goto out_end_tcpcheck;
3019 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003020 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003021 else {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003022 conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
Willy Tarreau263013d2015-05-13 11:59:14 +02003023 break;
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003024 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003025 }
3026
Baptiste Assmann69e273f2013-12-11 00:52:19 +01003027 /* mark the step as started */
3028 check->last_started_step = check->current_step;
3029
3030
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003031 /* Intermediate or complete response received.
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003032 * Terminate string in b_head(&check->bi) buffer.
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003033 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003034 if (b_data(&check->bi) < b_size(&check->bi)) {
3035 b_head(&check->bi)[b_data(&check->bi)] = '\0';
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003036 }
3037 else {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003038 b_head(&check->bi)[b_data(&check->bi) - 1] = '\0';
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003039 done = 1; /* buffer full, don't wait for more data */
3040 }
3041
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003042 contentptr = b_head(&check->bi);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003043
3044 /* Check that response body is not empty... */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003045 if (!b_data(&check->bi)) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003046 if (!done)
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01003047 continue;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003048
3049 /* empty response */
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02003050 step = tcpcheck_get_step_id(check);
3051 chunk_printf(&trash, "TCPCHK got an empty response at step %d", step);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003052 comment = tcpcheck_get_step_comment(check, step);
3053 if (comment)
3054 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003055 set_server_check_status(check, HCHK_STATUS_L7RSP,
3056 trash.area);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003057
3058 goto out_end_tcpcheck;
3059 }
3060
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003061 if (!done && (check->current_step->string != NULL) && (b_data(&check->bi) < check->current_step->string_len) )
Willy Tarreaua970c282013-12-06 12:47:19 +01003062 continue; /* try to read more */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003063
Willy Tarreaua970c282013-12-06 12:47:19 +01003064 tcpcheck_expect:
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003065 if (check->current_step->string != NULL)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003066 ret = my_memmem(contentptr, b_data(&check->bi), check->current_step->string, check->current_step->string_len) != NULL;
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003067 else if (check->current_step->expect_regex != NULL)
3068 ret = regex_exec(check->current_step->expect_regex, contentptr);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003069
3070 if (!ret && !done)
Willy Tarreaua970c282013-12-06 12:47:19 +01003071 continue; /* try to read more */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003072
3073 /* matched */
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02003074 step = tcpcheck_get_step_id(check);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003075 if (ret) {
3076 /* matched but we did not want to => ERROR */
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003077 if (check->current_step->inverse) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003078 /* we were looking for a string */
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003079 if (check->current_step->string != NULL) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003080 chunk_printf(&trash, "TCPCHK matched unwanted content '%s' at step %d",
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003081 check->current_step->string, step);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003082 }
3083 else {
3084 /* we were looking for a regex */
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02003085 chunk_printf(&trash, "TCPCHK matched unwanted content (regex) at step %d", step);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003086 }
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003087 comment = tcpcheck_get_step_comment(check, step);
3088 if (comment)
3089 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003090 set_server_check_status(check, HCHK_STATUS_L7RSP,
3091 trash.area);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003092 goto out_end_tcpcheck;
3093 }
3094 /* matched and was supposed to => OK, next step */
3095 else {
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003096 /* allow next rule */
Willy Tarreau5581c272015-05-13 12:24:53 +02003097 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003098
3099 /* bypass all comment rules */
Willy Tarreauf2c87352015-05-13 12:08:21 +02003100 while (&check->current_step->list != head &&
3101 check->current_step->action == TCPCHK_ACT_COMMENT)
Willy Tarreau5581c272015-05-13 12:24:53 +02003102 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003103
Willy Tarreauf2c87352015-05-13 12:08:21 +02003104 if (&check->current_step->list == head)
3105 break;
3106
Willy Tarreau98aec9f2013-12-06 16:16:41 +01003107 if (check->current_step->action == TCPCHK_ACT_EXPECT)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003108 goto tcpcheck_expect;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003109 }
3110 }
3111 else {
3112 /* not matched */
3113 /* not matched and was not supposed to => OK, next step */
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003114 if (check->current_step->inverse) {
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003115 /* allow next rule */
Willy Tarreau5581c272015-05-13 12:24:53 +02003116 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003117
3118 /* bypass all comment rules */
Willy Tarreauf2c87352015-05-13 12:08:21 +02003119 while (&check->current_step->list != head &&
3120 check->current_step->action == TCPCHK_ACT_COMMENT)
Willy Tarreau5581c272015-05-13 12:24:53 +02003121 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003122
Willy Tarreauf2c87352015-05-13 12:08:21 +02003123 if (&check->current_step->list == head)
3124 break;
3125
Willy Tarreau98aec9f2013-12-06 16:16:41 +01003126 if (check->current_step->action == TCPCHK_ACT_EXPECT)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003127 goto tcpcheck_expect;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003128 }
3129 /* not matched but was supposed to => ERROR */
3130 else {
3131 /* we were looking for a string */
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003132 if (check->current_step->string != NULL) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003133 chunk_printf(&trash, "TCPCHK did not match content '%s' at step %d",
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003134 check->current_step->string, step);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003135 }
3136 else {
3137 /* we were looking for a regex */
3138 chunk_printf(&trash, "TCPCHK did not match content (regex) at step %d",
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02003139 step);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003140 }
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003141 comment = tcpcheck_get_step_comment(check, step);
3142 if (comment)
3143 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003144 set_server_check_status(check, HCHK_STATUS_L7RSP,
3145 trash.area);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003146 goto out_end_tcpcheck;
3147 }
3148 }
3149 } /* end expect */
3150 } /* end loop over double chained step list */
3151
Baptiste Assmann248f1172018-03-01 21:49:01 +01003152 /* don't do anything until the connection is established */
3153 if (!(conn->flags & CO_FL_CONNECTED)) {
3154 /* update expire time, should be done by process_chk */
3155 /* we allow up to min(inter, timeout.connect) for a connection
3156 * to establish but only when timeout.check is set
3157 * as it may be to short for a full check otherwise
3158 */
3159 while (tick_is_expired(t->expire, now_ms)) {
3160 int t_con;
3161
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01003162 t_con = tick_add(t->expire, proxy->timeout.connect);
Baptiste Assmann248f1172018-03-01 21:49:01 +01003163 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
3164
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01003165 if (proxy->timeout.check)
Baptiste Assmann248f1172018-03-01 21:49:01 +01003166 t->expire = tick_first(t->expire, t_con);
3167 }
3168 goto out;
3169 }
3170
Willy Tarreau263013d2015-05-13 11:59:14 +02003171 /* We're waiting for some I/O to complete, we've reached the end of the
3172 * rules, or both. Do what we have to do, otherwise we're done.
3173 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003174 if (&check->current_step->list == head && !b_data(&check->bo)) {
Willy Tarreau263013d2015-05-13 11:59:14 +02003175 set_server_check_status(check, HCHK_STATUS_L7OKD, "(tcp-check)");
3176 goto out_end_tcpcheck;
3177 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003178
Willy Tarreau53c5a042015-05-13 11:38:17 +02003179 if (&check->current_step->list != head &&
Olivier Houchard53216e72018-10-10 15:46:36 +02003180 check->current_step->action == TCPCHK_ACT_EXPECT)
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003181 __event_srv_chk_r(cs);
Christopher Fauletb6102852017-11-28 10:06:29 +01003182 goto out;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003183
3184 out_end_tcpcheck:
3185 /* collect possible new errors */
Willy Tarreau4ff3b892017-10-16 15:17:17 +02003186 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreaub5259bf2017-10-04 14:47:29 +02003187 chk_report_conn_err(check, 0, 0);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003188
Baptiste Assmann69e273f2013-12-11 00:52:19 +01003189 /* cleanup before leaving */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003190 check->current_step = NULL;
3191
Willy Tarreau6aaa1b82013-12-11 17:09:34 +01003192 if (check->result == CHK_RES_FAILED)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003193 conn->flags |= CO_FL_ERROR;
3194
Christopher Fauletb6102852017-11-28 10:06:29 +01003195 out:
Willy Tarreau6bdcab02017-10-04 18:41:00 +02003196 return retcode;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003197}
3198
Simon Hormanb1900d52015-01-30 11:22:54 +09003199const char *init_check(struct check *check, int type)
3200{
3201 check->type = type;
3202
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003203 b_reset(&check->bi); check->bi.size = global.tune.chksize;
3204 b_reset(&check->bo); check->bo.size = global.tune.chksize;
Simon Hormanb1900d52015-01-30 11:22:54 +09003205
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003206 check->bi.area = calloc(check->bi.size, sizeof(char));
3207 check->bo.area = calloc(check->bo.size, sizeof(char));
3208
3209 if (!check->bi.area || !check->bo.area)
Simon Hormanb1900d52015-01-30 11:22:54 +09003210 return "out of memory while allocating check buffer";
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003211
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003212 check->wait_list.tasklet = tasklet_new();
3213 if (!check->wait_list.tasklet)
Olivier Houchard26e1a8f2018-09-12 15:15:12 +02003214 return "out of memroy while allocating check tasklet";
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003215 check->wait_list.events = 0;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003216 check->wait_list.tasklet->process = event_srv_chk_io;
3217 check->wait_list.tasklet->context = check;
Simon Hormanb1900d52015-01-30 11:22:54 +09003218 return NULL;
3219}
3220
Simon Hormanbfb5d332015-01-30 11:22:55 +09003221void free_check(struct check *check)
3222{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003223 free(check->bi.area);
3224 free(check->bo.area);
Christopher Faulet23d86d12018-01-25 11:36:35 +01003225 if (check->cs) {
3226 free(check->cs->conn);
3227 check->cs->conn = NULL;
3228 cs_free(check->cs);
3229 check->cs = NULL;
3230 }
Simon Hormanbfb5d332015-01-30 11:22:55 +09003231}
3232
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003233void email_alert_free(struct email_alert *alert)
3234{
3235 struct tcpcheck_rule *rule, *back;
3236
3237 if (!alert)
3238 return;
3239
Christopher Fauletde1a75b2017-10-23 15:38:19 +02003240 list_for_each_entry_safe(rule, back, &alert->tcpcheck_rules, list) {
3241 LIST_DEL(&rule->list);
3242 free(rule->comment);
3243 free(rule->string);
Dragan Dosen26743032019-04-30 15:54:36 +02003244 regex_free(rule->expect_regex);
Willy Tarreaubafbe012017-11-24 17:34:44 +01003245 pool_free(pool_head_tcpcheck_rule, rule);
Christopher Fauletde1a75b2017-10-23 15:38:19 +02003246 }
Willy Tarreaubafbe012017-11-24 17:34:44 +01003247 pool_free(pool_head_email_alert, alert);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003248}
3249
Olivier Houchard9f6af332018-05-25 14:04:04 +02003250static struct task *process_email_alert(struct task *t, void *context, unsigned short state)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003251{
Olivier Houchard9f6af332018-05-25 14:04:04 +02003252 struct check *check = context;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003253 struct email_alertq *q;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003254 struct email_alert *alert;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003255
3256 q = container_of(check, typeof(*q), check);
3257
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003258 HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003259 while (1) {
3260 if (!(check->state & CHK_ST_ENABLED)) {
3261 if (LIST_ISEMPTY(&q->email_alerts)) {
3262 /* All alerts processed, queue the task */
3263 t->expire = TICK_ETERNITY;
3264 task_queue(t);
Christopher Fauletc2a89a62017-10-23 15:54:24 +02003265 goto end;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003266 }
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003267
3268 alert = LIST_NEXT(&q->email_alerts, typeof(alert), list);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003269 LIST_DEL(&alert->list);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003270 t->expire = now_ms;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003271 check->tcpcheck_rules = &alert->tcpcheck_rules;
Olivier Houchard0923fa42019-01-11 18:43:04 +01003272 check->status = HCHK_STATUS_INI;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003273 check->state |= CHK_ST_ENABLED;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003274 }
3275
Olivier Houchard9f6af332018-05-25 14:04:04 +02003276 process_chk(t, context, state);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003277 if (check->state & CHK_ST_INPROGRESS)
3278 break;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003279
3280 alert = container_of(check->tcpcheck_rules, typeof(*alert), tcpcheck_rules);
3281 email_alert_free(alert);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003282 check->tcpcheck_rules = NULL;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003283 check->server = NULL;
3284 check->state &= ~CHK_ST_ENABLED;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003285 }
Christopher Fauletc2a89a62017-10-23 15:54:24 +02003286 end:
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003287 HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003288 return t;
3289}
3290
Christopher Faulet0108bb32017-10-20 21:34:32 +02003291/* Initializes mailer alerts for the proxy <p> using <mls> parameters.
3292 *
3293 * The function returns 1 in success case, otherwise, it returns 0 and err is
3294 * filled.
3295 */
3296int init_email_alert(struct mailers *mls, struct proxy *p, char **err)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003297{
Christopher Faulet0108bb32017-10-20 21:34:32 +02003298 struct mailer *mailer;
3299 struct email_alertq *queues;
3300 const char *err_str;
3301 int i = 0;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003302
Christopher Faulet0108bb32017-10-20 21:34:32 +02003303 if ((queues = calloc(mls->count, sizeof(*queues))) == NULL) {
3304 memprintf(err, "out of memory while allocating mailer alerts queues");
mildis5ab01cb2018-10-02 16:46:34 +02003305 goto fail_no_queue;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003306 }
3307
Christopher Faulet0108bb32017-10-20 21:34:32 +02003308 for (mailer = mls->mailer_list; mailer; i++, mailer = mailer->next) {
3309 struct email_alertq *q = &queues[i];
3310 struct check *check = &q->check;
3311 struct task *t;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003312
3313 LIST_INIT(&q->email_alerts);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003314 HA_SPIN_INIT(&q->lock);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003315 check->inter = mls->timeout.mail;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003316 check->rise = DEF_AGENT_RISETIME;
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01003317 check->proxy = p;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003318 check->fall = DEF_AGENT_FALLTIME;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003319 if ((err_str = init_check(check, PR_O2_TCPCHK_CHK))) {
3320 memprintf(err, "%s", err_str);
3321 goto error;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003322 }
3323
3324 check->xprt = mailer->xprt;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003325 check->addr = mailer->addr;
Christopher Fauletb797ae12018-03-27 15:35:35 +02003326 check->port = get_host_port(&mailer->addr);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003327
Emeric Brunc60def82017-09-27 14:59:38 +02003328 if ((t = task_new(MAX_THREADS_MASK)) == NULL) {
Christopher Faulet0108bb32017-10-20 21:34:32 +02003329 memprintf(err, "out of memory while allocating mailer alerts task");
3330 goto error;
3331 }
3332
3333 check->task = t;
3334 t->process = process_email_alert;
3335 t->context = check;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003336
Christopher Faulet0108bb32017-10-20 21:34:32 +02003337 /* check this in one ms */
3338 t->expire = TICK_ETERNITY;
3339 check->start = now;
3340 task_queue(t);
3341 }
3342
3343 mls->users++;
3344 free(p->email_alert.mailers.name);
3345 p->email_alert.mailers.m = mls;
3346 p->email_alert.queues = queues;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003347 return 0;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003348
3349 error:
3350 for (i = 0; i < mls->count; i++) {
3351 struct email_alertq *q = &queues[i];
3352 struct check *check = &q->check;
3353
Willy Tarreauf6562792019-05-07 19:05:35 +02003354 task_destroy(check->task);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003355 free_check(check);
3356 }
3357 free(queues);
mildis5ab01cb2018-10-02 16:46:34 +02003358 fail_no_queue:
Christopher Faulet0108bb32017-10-20 21:34:32 +02003359 return 1;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003360}
3361
3362
3363static int add_tcpcheck_expect_str(struct list *list, const char *str)
3364{
3365 struct tcpcheck_rule *tcpcheck;
3366
Willy Tarreaubafbe012017-11-24 17:34:44 +01003367 if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003368 return 0;
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003369 memset(tcpcheck, 0, sizeof(*tcpcheck));
3370 tcpcheck->action = TCPCHK_ACT_EXPECT;
3371 tcpcheck->string = strdup(str);
3372 tcpcheck->expect_regex = NULL;
3373 tcpcheck->comment = NULL;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003374 if (!tcpcheck->string) {
Willy Tarreaubafbe012017-11-24 17:34:44 +01003375 pool_free(pool_head_tcpcheck_rule, tcpcheck);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003376 return 0;
3377 }
3378
3379 LIST_ADDQ(list, &tcpcheck->list);
3380 return 1;
3381}
3382
3383static int add_tcpcheck_send_strs(struct list *list, const char * const *strs)
3384{
3385 struct tcpcheck_rule *tcpcheck;
Willy Tarreau64345aa2016-08-10 19:29:09 +02003386 const char *in;
3387 char *dst;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003388 int i;
3389
Willy Tarreaubafbe012017-11-24 17:34:44 +01003390 if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003391 return 0;
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003392 memset(tcpcheck, 0, sizeof(*tcpcheck));
3393 tcpcheck->action = TCPCHK_ACT_SEND;
3394 tcpcheck->expect_regex = NULL;
3395 tcpcheck->comment = NULL;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003396 tcpcheck->string_len = 0;
3397 for (i = 0; strs[i]; i++)
3398 tcpcheck->string_len += strlen(strs[i]);
3399
3400 tcpcheck->string = malloc(tcpcheck->string_len + 1);
3401 if (!tcpcheck->string) {
Willy Tarreaubafbe012017-11-24 17:34:44 +01003402 pool_free(pool_head_tcpcheck_rule, tcpcheck);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003403 return 0;
3404 }
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003405
Willy Tarreau64345aa2016-08-10 19:29:09 +02003406 dst = tcpcheck->string;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003407 for (i = 0; strs[i]; i++)
Willy Tarreau64345aa2016-08-10 19:29:09 +02003408 for (in = strs[i]; (*dst = *in++); dst++);
3409 *dst = 0;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003410
3411 LIST_ADDQ(list, &tcpcheck->list);
3412 return 1;
3413}
3414
Christopher Faulet0108bb32017-10-20 21:34:32 +02003415static int enqueue_one_email_alert(struct proxy *p, struct server *s,
3416 struct email_alertq *q, const char *msg)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003417{
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003418 struct email_alert *alert;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003419 struct tcpcheck_rule *tcpcheck;
3420 struct check *check = &q->check;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003421
Willy Tarreaubafbe012017-11-24 17:34:44 +01003422 if ((alert = pool_alloc(pool_head_email_alert)) == NULL)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003423 goto error;
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003424 LIST_INIT(&alert->list);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003425 LIST_INIT(&alert->tcpcheck_rules);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003426 alert->srv = s;
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003427
Willy Tarreaubafbe012017-11-24 17:34:44 +01003428 if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003429 goto error;
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003430 memset(tcpcheck, 0, sizeof(*tcpcheck));
3431 tcpcheck->action = TCPCHK_ACT_CONNECT;
3432 tcpcheck->comment = NULL;
3433 tcpcheck->string = NULL;
3434 tcpcheck->expect_regex = NULL;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003435 LIST_ADDQ(&alert->tcpcheck_rules, &tcpcheck->list);
3436
3437 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "220 "))
3438 goto error;
3439
3440 {
3441 const char * const strs[4] = { "EHLO ", p->email_alert.myhostname, "\r\n" };
3442 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3443 goto error;
3444 }
3445
3446 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 "))
3447 goto error;
3448
3449 {
3450 const char * const strs[4] = { "MAIL FROM:<", p->email_alert.from, ">\r\n" };
3451 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3452 goto error;
3453 }
3454
3455 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 "))
3456 goto error;
3457
3458 {
3459 const char * const strs[4] = { "RCPT TO:<", p->email_alert.to, ">\r\n" };
3460 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3461 goto error;
3462 }
3463
3464 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 "))
3465 goto error;
3466
3467 {
3468 const char * const strs[2] = { "DATA\r\n" };
3469 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3470 goto error;
3471 }
3472
3473 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "354 "))
3474 goto error;
3475
3476 {
3477 struct tm tm;
3478 char datestr[48];
3479 const char * const strs[18] = {
Pieter Baauw5e0964e2016-02-13 16:27:35 +01003480 "From: ", p->email_alert.from, "\r\n",
3481 "To: ", p->email_alert.to, "\r\n",
3482 "Date: ", datestr, "\r\n",
3483 "Subject: [HAproxy Alert] ", msg, "\r\n",
3484 "\r\n",
3485 msg, "\r\n",
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003486 "\r\n",
Pieter Baauwed35c372015-07-22 19:51:54 +02003487 ".\r\n",
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003488 NULL
3489 };
3490
3491 get_localtime(date.tv_sec, &tm);
3492
3493 if (strftime(datestr, sizeof(datestr), "%a, %d %b %Y %T %z (%Z)", &tm) == 0) {
3494 goto error;
3495 }
3496
3497 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3498 goto error;
3499 }
3500
3501 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 "))
3502 goto error;
3503
3504 {
3505 const char * const strs[2] = { "QUIT\r\n" };
3506 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3507 goto error;
3508 }
3509
3510 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "221 "))
3511 goto error;
3512
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003513 HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003514 task_wakeup(check->task, TASK_WOKEN_MSG);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003515 LIST_ADDQ(&q->email_alerts, &alert->list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003516 HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003517 return 1;
3518
3519error:
3520 email_alert_free(alert);
3521 return 0;
3522}
3523
Christopher Faulet0108bb32017-10-20 21:34:32 +02003524static void enqueue_email_alert(struct proxy *p, struct server *s, const char *msg)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003525{
3526 int i;
3527 struct mailer *mailer;
3528
3529 for (i = 0, mailer = p->email_alert.mailers.m->mailer_list;
3530 i < p->email_alert.mailers.m->count; i++, mailer = mailer->next) {
Christopher Faulet0108bb32017-10-20 21:34:32 +02003531 if (!enqueue_one_email_alert(p, s, &p->email_alert.queues[i], msg)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01003532 ha_alert("Email alert [%s] could not be enqueued: out of memory\n", p->id);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003533 return;
3534 }
3535 }
3536
3537 return;
3538}
3539
3540/*
3541 * Send email alert if configured.
3542 */
Simon Horman64e34162015-02-06 11:11:57 +09003543void send_email_alert(struct server *s, int level, const char *format, ...)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003544{
3545 va_list argp;
3546 char buf[1024];
3547 int len;
3548 struct proxy *p = s->proxy;
3549
Christopher Faulet0108bb32017-10-20 21:34:32 +02003550 if (!p->email_alert.mailers.m || level > p->email_alert.level || format == NULL)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003551 return;
3552
3553 va_start(argp, format);
3554 len = vsnprintf(buf, sizeof(buf), format, argp);
3555 va_end(argp);
3556
Thierry FOURNIER62c8a212017-02-09 12:19:27 +01003557 if (len < 0 || len >= sizeof(buf)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01003558 ha_alert("Email alert [%s] could not format message\n", p->id);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003559 return;
3560 }
3561
Christopher Faulet0108bb32017-10-20 21:34:32 +02003562 enqueue_email_alert(p, s, buf);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003563}
3564
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02003565/*
3566 * Return value:
3567 * the port to be used for the health check
3568 * 0 in case no port could be found for the check
3569 */
3570int srv_check_healthcheck_port(struct check *chk)
3571{
3572 int i = 0;
3573 struct server *srv = NULL;
3574
3575 srv = chk->server;
3576
3577 /* If neither a port nor an addr was specified and no check transport
3578 * layer is forced, then the transport layer used by the checks is the
3579 * same as for the production traffic. Otherwise we use raw_sock by
3580 * default, unless one is specified.
3581 */
3582 if (!chk->port && !is_addr(&chk->addr)) {
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02003583 chk->use_ssl |= (srv->use_ssl || (srv->proxy->options & PR_O_TCPCHK_SSL));
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02003584 chk->send_proxy |= (srv->pp_opts);
3585 }
3586
3587 /* by default, we use the health check port ocnfigured */
3588 if (chk->port > 0)
3589 return chk->port;
3590
3591 /* try to get the port from check_core.addr if check.port not set */
3592 i = get_host_port(&chk->addr);
3593 if (i > 0)
3594 return i;
3595
3596 /* try to get the port from server address */
3597 /* prevent MAPPORTS from working at this point, since checks could
3598 * not be performed in such case (MAPPORTS impose a relative ports
3599 * based on live traffic)
3600 */
3601 if (srv->flags & SRV_F_MAPPORTS)
3602 return 0;
Willy Tarreau04276f32017-01-06 17:41:29 +01003603
3604 i = srv->svc_port; /* by default */
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02003605 if (i > 0)
3606 return i;
3607
3608 return 0;
3609}
3610
Willy Tarreau172f5ce2018-11-26 11:21:50 +01003611REGISTER_POST_CHECK(start_checks);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003612
Willy Tarreaubd741542010-03-16 18:46:54 +01003613/*
Willy Tarreaubaaee002006-06-26 02:48:02 +02003614 * Local variables:
3615 * c-indent-level: 8
3616 * c-basic-offset: 8
3617 * End:
3618 */