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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 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001385 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau2b57cb82013-06-10 19:56:38 +02001386
Willy Tarreau25e2ab52013-12-04 11:17:05 +01001387 /* OK, let's not stay here forever */
Willy Tarreau6aaa1b82013-12-11 17:09:34 +01001388 if (check->result == CHK_RES_FAILED)
Willy Tarreau25e2ab52013-12-04 11:17:05 +01001389 conn->flags |= CO_FL_ERROR;
1390
Willy Tarreaufdccded2008-08-29 18:19:04 +02001391 task_wakeup(t, TASK_WOKEN_IO);
Olivier Houchardaf4021e2018-08-09 13:06:55 +02001392out:
Willy Tarreau3267d362012-08-17 23:53:56 +02001393 return;
Willy Tarreau03938182010-03-17 21:52:07 +01001394
1395 wait_more_data:
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001396 cs->conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
Olivier Houchardaf4021e2018-08-09 13:06:55 +02001397 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001398}
1399
Willy Tarreaufb56aab2012-09-28 14:40:02 +02001400/*
1401 * This function is used only for server health-checks. It handles connection
1402 * status updates including errors. If necessary, it wakes the check task up.
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001403 * It returns 0 on normal cases, <0 if at least one close() has happened on the
1404 * connection (eg: reconnect).
Willy Tarreaufb56aab2012-09-28 14:40:02 +02001405 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001406static int wake_srv_chk(struct conn_stream *cs)
Willy Tarreau20bea422012-07-06 12:00:49 +02001407{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001408 struct connection *conn = cs->conn;
1409 struct check *check = cs->data;
Olivier Houchard0923fa42019-01-11 18:43:04 +01001410 struct email_alertq *q = container_of(check, typeof(*q), check);
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001411 int ret = 0;
Willy Tarreau20bea422012-07-06 12:00:49 +02001412
Olivier Houchard0923fa42019-01-11 18:43:04 +01001413 if (check->server)
1414 HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock);
1415 else
1416 HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock);
Emeric Brunf6ba17d2017-11-02 14:35:27 +01001417
Willy Tarreauc09572f2017-10-04 11:58:22 +02001418 /* we may have to make progress on the TCP checks */
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001419 if (check->type == PR_O2_TCPCHK_CHK) {
1420 ret = tcpcheck_main(check);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001421 cs = check->cs;
Willy Tarreau543abd42018-09-20 11:25:12 +02001422 conn = cs->conn;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001423 } else if (!(check->wait_list.events & SUB_RETRY_SEND))
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001424 __event_srv_chk_w(cs);
Willy Tarreauc09572f2017-10-04 11:58:22 +02001425
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001426 if (unlikely(conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)) {
Willy Tarreau02b0f582013-12-03 15:42:33 +01001427 /* We may get error reports bypassing the I/O handlers, typically
1428 * the case when sending a pure TCP check which fails, then the I/O
1429 * handlers above are not called. This is completely handled by the
Willy Tarreau25e2ab52013-12-04 11:17:05 +01001430 * main processing task so let's simply wake it up. If we get here,
1431 * we expect errno to still be valid.
1432 */
Willy Tarreaub5259bf2017-10-04 14:47:29 +02001433 chk_report_conn_err(check, errno, 0);
Willy Tarreau2d351b62013-12-05 02:36:25 +01001434 task_wakeup(check->task, TASK_WOKEN_IO);
1435 }
Olivier Houchard53216e72018-10-10 15:46:36 +02001436 else if (!(conn->flags & CO_FL_HANDSHAKE) && !check->type) {
Willy Tarreau3be293f2014-02-05 18:31:24 +01001437 /* we may get here if only a connection probe was required : we
1438 * don't have any data to send nor anything expected in response,
1439 * so the completion of the connection establishment is enough.
1440 */
1441 task_wakeup(check->task, TASK_WOKEN_IO);
1442 }
Willy Tarreau2d351b62013-12-05 02:36:25 +01001443
Willy Tarreau6aaa1b82013-12-11 17:09:34 +01001444 if (check->result != CHK_RES_UNKNOWN) {
Christopher Faulet774c4862019-01-21 14:15:50 +01001445 /* Check complete or aborted. If connection not yet closed do it
1446 * now and wake the check task up to be sure the result is
1447 * handled ASAP. */
Willy Tarreaud85c4852015-03-13 00:40:28 +01001448 conn_sock_drain(conn);
Willy Tarreaua553ae92017-10-05 18:52:17 +02001449 cs_close(cs);
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001450 ret = -1;
Christopher Faulet774c4862019-01-21 14:15:50 +01001451 task_wakeup(check->task, TASK_WOKEN_IO);
Willy Tarreau2d351b62013-12-05 02:36:25 +01001452 }
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001453
Olivier Houchard0923fa42019-01-11 18:43:04 +01001454 if (check->server)
1455 HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock);
1456 else
1457 HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock);
Emeric Brunf6ba17d2017-11-02 14:35:27 +01001458
Willy Tarreau6bdcab02017-10-04 18:41:00 +02001459 /* if a connection got replaced, we must absolutely prevent the connection
1460 * handler from touching its fd, and perform the FD polling updates ourselves
1461 */
1462 if (ret < 0)
1463 conn_cond_update_polling(conn);
1464
1465 return ret;
Willy Tarreau20bea422012-07-06 12:00:49 +02001466}
1467
Willy Tarreaufb56aab2012-09-28 14:40:02 +02001468struct data_cb check_conn_cb = {
Willy Tarreaufb56aab2012-09-28 14:40:02 +02001469 .wake = wake_srv_chk,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +01001470 .name = "CHCK",
Willy Tarreaufb56aab2012-09-28 14:40:02 +02001471};
1472
Willy Tarreaubaaee002006-06-26 02:48:02 +02001473/*
Willy Tarreau2e993902011-10-31 11:53:20 +01001474 * updates the server's weight during a warmup stage. Once the final weight is
1475 * reached, the task automatically stops. Note that any server status change
1476 * must have updated s->last_change accordingly.
1477 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02001478static struct task *server_warmup(struct task *t, void *context, unsigned short state)
Willy Tarreau2e993902011-10-31 11:53:20 +01001479{
Olivier Houchard9f6af332018-05-25 14:04:04 +02001480 struct server *s = context;
Willy Tarreau2e993902011-10-31 11:53:20 +01001481
1482 /* by default, plan on stopping the task */
1483 t->expire = TICK_ETERNITY;
Emeric Brun52a91d32017-08-31 14:41:55 +02001484 if ((s->next_admin & SRV_ADMF_MAINT) ||
1485 (s->next_state != SRV_ST_STARTING))
Willy Tarreau2e993902011-10-31 11:53:20 +01001486 return t;
1487
Willy Tarreau4fc49a92019-05-05 06:54:22 +02001488 HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
1489
Willy Tarreau892337c2014-05-13 23:41:20 +02001490 /* recalculate the weights and update the state */
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001491 server_recalc_eweight(s, 1);
Willy Tarreau2e993902011-10-31 11:53:20 +01001492
1493 /* probably that we can refill this server with a bit more connections */
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001494 pendconn_grab_from_px(s);
Willy Tarreau2e993902011-10-31 11:53:20 +01001495
Willy Tarreau4fc49a92019-05-05 06:54:22 +02001496 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
1497
Willy Tarreau2e993902011-10-31 11:53:20 +01001498 /* get back there in 1 second or 1/20th of the slowstart interval,
1499 * whichever is greater, resulting in small 5% steps.
1500 */
Emeric Brun52a91d32017-08-31 14:41:55 +02001501 if (s->next_state == SRV_ST_STARTING)
Willy Tarreau2e993902011-10-31 11:53:20 +01001502 t->expire = tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20)));
1503 return t;
1504}
1505
Willy Tarreau894c6422017-10-04 15:58:52 +02001506/* returns the first NON-COMMENT tcp-check rule from list <list> or NULL if
1507 * none was found.
1508 */
1509static struct tcpcheck_rule *get_first_tcpcheck_rule(struct list *list)
1510{
1511 struct tcpcheck_rule *r;
1512
1513 list_for_each_entry(r, list, list) {
1514 if (r->action != TCPCHK_ACT_COMMENT)
1515 return r;
1516 }
1517 return NULL;
1518}
1519
Willy Tarreau2e993902011-10-31 11:53:20 +01001520/*
Simon Horman98637e52014-06-20 12:30:16 +09001521 * establish a server health-check that makes use of a connection.
Simon Hormanb00d17a2014-06-13 16:18:16 +09001522 *
1523 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001524 * - SF_ERR_NONE if everything's OK and tcpcheck_main() was not called
1525 * - SF_ERR_UP if if everything's OK and tcpcheck_main() was called
1526 * - SF_ERR_SRVTO if there are no more servers
1527 * - SF_ERR_SRVCL if the connection was refused by the server
1528 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1529 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1530 * - SF_ERR_INTERNAL for any other purely internal errors
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02001531 * - 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 +01001532 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Simon Hormanb00d17a2014-06-13 16:18:16 +09001533 * Note that we try to prevent the network stack from sending the ACK during the
1534 * connect() when a pure TCP check is used (without PROXY protocol).
1535 */
Simon Horman98637e52014-06-20 12:30:16 +09001536static int connect_conn_chk(struct task *t)
Simon Hormanb00d17a2014-06-13 16:18:16 +09001537{
1538 struct check *check = t->context;
1539 struct server *s = check->server;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001540 struct conn_stream *cs = check->cs;
1541 struct connection *conn = cs_conn(cs);
Simon Hormanb00d17a2014-06-13 16:18:16 +09001542 struct protocol *proto;
Willy Tarreauf411cce2017-10-04 16:21:19 +02001543 struct tcpcheck_rule *tcp_rule = NULL;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001544 int ret;
Olivier Houchardfdcb0072019-05-06 18:32:29 +02001545 int connflags = 0;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001546
Willy Tarreau00149122017-10-04 18:05:01 +02001547 /* we cannot have a connection here */
1548 if (conn)
1549 return SF_ERR_INTERNAL;
1550
Simon Hormanb00d17a2014-06-13 16:18:16 +09001551 /* tcpcheck send/expect initialisation */
Willy Tarreauf411cce2017-10-04 16:21:19 +02001552 if (check->type == PR_O2_TCPCHK_CHK) {
Simon Hormanb00d17a2014-06-13 16:18:16 +09001553 check->current_step = NULL;
Willy Tarreauf411cce2017-10-04 16:21:19 +02001554 tcp_rule = get_first_tcpcheck_rule(check->tcpcheck_rules);
1555 }
Simon Hormanb00d17a2014-06-13 16:18:16 +09001556
1557 /* prepare the check buffer.
1558 * This should not be used if check is the secondary agent check
1559 * of a server as s->proxy->check_req will relate to the
1560 * configuration of the primary check. Similarly, tcp-check uses
1561 * its own strings.
1562 */
1563 if (check->type && check->type != PR_O2_TCPCHK_CHK && !(check->state & CHK_ST_AGENT)) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001564 b_putblk(&check->bo, s->proxy->check_req, s->proxy->check_len);
Simon Hormanb00d17a2014-06-13 16:18:16 +09001565
1566 /* we want to check if this host replies to HTTP or SSLv3 requests
1567 * so we'll send the request, and won't wake the checker up now.
1568 */
1569 if ((check->type) == PR_O2_SSL3_CHK) {
1570 /* SSL requires that we put Unix time in the request */
1571 int gmt_time = htonl(date.tv_sec);
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001572 memcpy(b_head(&check->bo) + 11, &gmt_time, 4);
Simon Hormanb00d17a2014-06-13 16:18:16 +09001573 }
1574 else if ((check->type) == PR_O2_HTTP_CHK) {
1575 if (s->proxy->options2 & PR_O2_CHK_SNDST)
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001576 b_putblk(&check->bo, trash.area,
1577 httpchk_build_status_header(s, trash.area, trash.size));
Cyril Bonté32602d22015-01-30 00:07:07 +01001578 /* prevent HTTP keep-alive when "http-check expect" is used */
1579 if (s->proxy->options2 & PR_O2_EXP_TYPE)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001580 b_putist(&check->bo, ist("Connection: close\r\n"));
1581 b_putist(&check->bo, ist("\r\n"));
1582 *b_tail(&check->bo) = '\0'; /* to make gdb output easier to read */
Simon Hormanb00d17a2014-06-13 16:18:16 +09001583 }
1584 }
1585
James Brown55f9ff12015-10-21 18:19:05 -07001586 if ((check->type & PR_O2_LB_AGENT_CHK) && check->send_string_len) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001587 b_putblk(&check->bo, check->send_string, check->send_string_len);
James Brown55f9ff12015-10-21 18:19:05 -07001588 }
1589
Willy Tarreauf411cce2017-10-04 16:21:19 +02001590 /* for tcp-checks, the initial connection setup is handled separately as
1591 * it may be sent to a specific port and not to the server's.
1592 */
1593 if (tcp_rule && tcp_rule->action == TCPCHK_ACT_CONNECT) {
1594 tcpcheck_main(check);
1595 return SF_ERR_UP;
1596 }
1597
Simon Hormanb00d17a2014-06-13 16:18:16 +09001598 /* prepare a new connection */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001599 cs = check->cs = cs_new(NULL);
1600 if (!check->cs)
Willy Tarreau00149122017-10-04 18:05:01 +02001601 return SF_ERR_RESOURCE;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001602 conn = cs->conn;
Olivier Houchard26e1a8f2018-09-12 15:15:12 +02001603 /* Maybe there were an older connection we were waiting on */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001604 check->wait_list.events = 0;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001605
Simon Horman41f58762015-01-30 11:22:56 +09001606 if (is_addr(&check->addr)) {
Simon Hormanb00d17a2014-06-13 16:18:16 +09001607 /* we'll connect to the check addr specified on the server */
Simon Horman41f58762015-01-30 11:22:56 +09001608 conn->addr.to = check->addr;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001609 }
1610 else {
1611 /* we'll connect to the addr on the server */
1612 conn->addr.to = s->addr;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001613 }
1614
Alexander Liu2a54bb72019-05-22 19:44:48 +08001615 if (s->check.via_socks4 && (s->flags & SRV_F_SOCKS4_PROXY)) {
1616 conn->send_proxy_ofs = 1;
1617 conn->flags |= CO_FL_SOCKS4;
1618 }
1619
Olivier Houchard6377a002017-12-01 22:04:05 +01001620 proto = protocol_by_family(conn->addr.to.ss_family);
Olivier Houchard6377a002017-12-01 22:04:05 +01001621 conn->target = &s->obj_type;
1622
Willy Tarreaube373152018-09-06 11:45:30 +02001623 if ((conn->addr.to.ss_family == AF_INET) || (conn->addr.to.ss_family == AF_INET6)) {
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02001624 int i = 0;
1625
1626 i = srv_check_healthcheck_port(check);
Olivier Houchard6377a002017-12-01 22:04:05 +01001627 if (i == 0)
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02001628 return SF_ERR_CHK_PORT;
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02001629
1630 set_host_port(&conn->addr.to, i);
Simon Hormanb00d17a2014-06-13 16:18:16 +09001631 }
1632
Thierry FOURNIERbb2ae642015-01-14 11:31:49 +01001633 /* no client address */
1634 clear_addr(&conn->addr.from);
1635
Willy Tarreaube373152018-09-06 11:45:30 +02001636 conn_prepare(conn, proto, check->xprt);
Olivier Houchardf67be932019-01-29 15:47:43 +01001637 if (conn_install_mux(conn, &mux_pt_ops, cs, s->proxy, NULL) < 0)
1638 return SF_ERR_RESOURCE;
Willy Tarreaube373152018-09-06 11:45:30 +02001639 cs_attach(cs, check, &check_conn_cb);
1640
Willy Tarreauf3d34822014-12-08 12:11:28 +01001641 /* only plain tcp-check supports quick ACK */
Olivier Houchardfdcb0072019-05-06 18:32:29 +02001642 if (check->type != 0)
1643 connflags |= CONNECT_HAS_DATA;
1644 if ((check->type == 0 || check->type == PR_O2_TCPCHK_CHK) &&
1645 (!tcp_rule || tcp_rule->action != TCPCHK_ACT_EXPECT))
1646 connflags |= CONNECT_DELACK_ALWAYS;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001647
Willy Tarreaue7dff022015-04-03 01:14:29 +02001648 ret = SF_ERR_INTERNAL;
Olivier Houchardb68fda42017-08-04 18:39:01 +02001649 if (proto && proto->connect)
Olivier Houchardfdcb0072019-05-06 18:32:29 +02001650 ret = proto->connect(conn, connflags);
Willy Tarreau16257f62017-11-02 15:45:00 +01001651
Willy Tarreau16257f62017-11-02 15:45:00 +01001652
Olivier Houchard9130a962017-10-17 17:33:43 +02001653#ifdef USE_OPENSSL
Olivier Houcharda48437b2019-01-29 16:37:52 +01001654 if (ret == SF_ERR_NONE) {
1655 if (s->check.sni)
1656 ssl_sock_set_servername(conn, s->check.sni);
1657 if (s->check.alpn_str)
1658 ssl_sock_set_alpn(conn, (unsigned char *)s->check.alpn_str,
1659 s->check.alpn_len);
1660 }
Olivier Houchard9130a962017-10-17 17:33:43 +02001661#endif
Willy Tarreauf4949772017-05-06 08:45:28 +02001662 if (s->check.send_proxy && !(check->state & CHK_ST_AGENT)) {
Simon Hormanb00d17a2014-06-13 16:18:16 +09001663 conn->send_proxy_ofs = 1;
1664 conn->flags |= CO_FL_SEND_PROXY;
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001665 if (xprt_add_hs(conn) < 0)
1666 ret = SF_ERR_RESOURCE;
Simon Hormanb00d17a2014-06-13 16:18:16 +09001667 }
1668
1669 return ret;
1670}
1671
Simon Horman98637e52014-06-20 12:30:16 +09001672static struct list pid_list = LIST_HEAD_INIT(pid_list);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001673static struct pool_head *pool_head_pid_list;
Willy Tarreau86abe442018-11-25 20:12:18 +01001674__decl_spinlock(pid_list_lock);
Simon Horman98637e52014-06-20 12:30:16 +09001675
1676void block_sigchld(void)
1677{
1678 sigset_t set;
1679 sigemptyset(&set);
1680 sigaddset(&set, SIGCHLD);
William Lallemand6e1796e2018-06-07 11:23:40 +02001681 assert(ha_sigmask(SIG_BLOCK, &set, NULL) == 0);
Simon Horman98637e52014-06-20 12:30:16 +09001682}
1683
1684void unblock_sigchld(void)
1685{
1686 sigset_t set;
1687 sigemptyset(&set);
Willy Tarreauebc92442016-06-21 17:29:46 +02001688 sigaddset(&set, SIGCHLD);
William Lallemand6e1796e2018-06-07 11:23:40 +02001689 assert(ha_sigmask(SIG_UNBLOCK, &set, NULL) == 0);
Simon Horman98637e52014-06-20 12:30:16 +09001690}
1691
Simon Horman98637e52014-06-20 12:30:16 +09001692static struct pid_list *pid_list_add(pid_t pid, struct task *t)
1693{
1694 struct pid_list *elem;
1695 struct check *check = t->context;
1696
Willy Tarreaubafbe012017-11-24 17:34:44 +01001697 elem = pool_alloc(pool_head_pid_list);
Simon Horman98637e52014-06-20 12:30:16 +09001698 if (!elem)
1699 return NULL;
1700 elem->pid = pid;
1701 elem->t = t;
1702 elem->exited = 0;
1703 check->curpid = elem;
1704 LIST_INIT(&elem->list);
Christopher Fauletcfda8472017-10-20 15:40:23 +02001705
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001706 HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock);
Simon Horman98637e52014-06-20 12:30:16 +09001707 LIST_ADD(&pid_list, &elem->list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001708 HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock);
Christopher Fauletcfda8472017-10-20 15:40:23 +02001709
Simon Horman98637e52014-06-20 12:30:16 +09001710 return elem;
1711}
1712
Simon Horman98637e52014-06-20 12:30:16 +09001713static void pid_list_del(struct pid_list *elem)
1714{
1715 struct check *check;
1716
1717 if (!elem)
1718 return;
1719
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001720 HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock);
Simon Horman98637e52014-06-20 12:30:16 +09001721 LIST_DEL(&elem->list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001722 HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock);
Christopher Fauletcfda8472017-10-20 15:40:23 +02001723
Simon Horman98637e52014-06-20 12:30:16 +09001724 if (!elem->exited)
1725 kill(elem->pid, SIGTERM);
1726
1727 check = elem->t->context;
1728 check->curpid = NULL;
Willy Tarreaubafbe012017-11-24 17:34:44 +01001729 pool_free(pool_head_pid_list, elem);
Simon Horman98637e52014-06-20 12:30:16 +09001730}
1731
1732/* Called from inside SIGCHLD handler, SIGCHLD is blocked */
1733static void pid_list_expire(pid_t pid, int status)
1734{
1735 struct pid_list *elem;
1736
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001737 HA_SPIN_LOCK(PID_LIST_LOCK, &pid_list_lock);
Simon Horman98637e52014-06-20 12:30:16 +09001738 list_for_each_entry(elem, &pid_list, list) {
1739 if (elem->pid == pid) {
1740 elem->t->expire = now_ms;
1741 elem->status = status;
1742 elem->exited = 1;
Cyril Bonté9dbcfab2014-08-07 01:55:39 +02001743 task_wakeup(elem->t, TASK_WOKEN_IO);
Christopher Fauletcfda8472017-10-20 15:40:23 +02001744 break;
Simon Horman98637e52014-06-20 12:30:16 +09001745 }
1746 }
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001747 HA_SPIN_UNLOCK(PID_LIST_LOCK, &pid_list_lock);
Simon Horman98637e52014-06-20 12:30:16 +09001748}
1749
Willy Tarreau48d6bf22016-06-21 16:27:34 +02001750static void sigchld_handler(struct sig_handler *sh)
Simon Horman98637e52014-06-20 12:30:16 +09001751{
1752 pid_t pid;
1753 int status;
Willy Tarreau48d6bf22016-06-21 16:27:34 +02001754
Simon Horman98637e52014-06-20 12:30:16 +09001755 while ((pid = waitpid(0, &status, WNOHANG)) > 0)
1756 pid_list_expire(pid, status);
1757}
1758
Willy Tarreau48d6bf22016-06-21 16:27:34 +02001759static int init_pid_list(void)
1760{
Willy Tarreaubafbe012017-11-24 17:34:44 +01001761 if (pool_head_pid_list != NULL)
Simon Horman98637e52014-06-20 12:30:16 +09001762 /* Nothing to do */
1763 return 0;
1764
Willy Tarreau48d6bf22016-06-21 16:27:34 +02001765 if (!signal_register_fct(SIGCHLD, sigchld_handler, SIGCHLD)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001766 ha_alert("Failed to set signal handler for external health checks: %s. Aborting.\n",
1767 strerror(errno));
Simon Horman98637e52014-06-20 12:30:16 +09001768 return 1;
1769 }
1770
Willy Tarreaubafbe012017-11-24 17:34:44 +01001771 pool_head_pid_list = create_pool("pid_list", sizeof(struct pid_list), MEM_F_SHARED);
1772 if (pool_head_pid_list == NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001773 ha_alert("Failed to allocate memory pool for external health checks: %s. Aborting.\n",
1774 strerror(errno));
Simon Horman98637e52014-06-20 12:30:16 +09001775 return 1;
1776 }
1777
1778 return 0;
1779}
1780
Cyril Bontéac92a062014-12-27 22:28:38 +01001781/* helper macro to set an environment variable and jump to a specific label on failure. */
1782#define EXTCHK_SETENV(check, envidx, value, fail) { if (extchk_setenv(check, envidx, value)) goto fail; }
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001783
1784/*
Cyril Bontéac92a062014-12-27 22:28:38 +01001785 * helper function to allocate enough memory to store an environment variable.
1786 * It will also check that the environment variable is updatable, and silently
1787 * fail if not.
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001788 */
Cyril Bontéac92a062014-12-27 22:28:38 +01001789static int extchk_setenv(struct check *check, int idx, const char *value)
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001790{
1791 int len, ret;
Cyril Bontéac92a062014-12-27 22:28:38 +01001792 char *envname;
1793 int vmaxlen;
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001794
Cyril Bontéac92a062014-12-27 22:28:38 +01001795 if (idx < 0 || idx >= EXTCHK_SIZE) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001796 ha_alert("Illegal environment variable index %d. Aborting.\n", idx);
Cyril Bontéac92a062014-12-27 22:28:38 +01001797 return 1;
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001798 }
Cyril Bontéac92a062014-12-27 22:28:38 +01001799
1800 envname = extcheck_envs[idx].name;
1801 vmaxlen = extcheck_envs[idx].vmaxlen;
1802
1803 /* Check if the environment variable is already set, and silently reject
1804 * the update if this one is not updatable. */
1805 if ((vmaxlen == EXTCHK_SIZE_EVAL_INIT) && (check->envp[idx]))
1806 return 0;
1807
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001808 /* Instead of sending NOT_USED, sending an empty value is preferable */
1809 if (strcmp(value, "NOT_USED") == 0) {
1810 value = "";
1811 }
Cyril Bontéac92a062014-12-27 22:28:38 +01001812
1813 len = strlen(envname) + 1;
1814 if (vmaxlen == EXTCHK_SIZE_EVAL_INIT)
1815 len += strlen(value);
1816 else
1817 len += vmaxlen;
1818
1819 if (!check->envp[idx])
1820 check->envp[idx] = malloc(len + 1);
1821
1822 if (!check->envp[idx]) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001823 ha_alert("Failed to allocate memory for the environment variable '%s'. Aborting.\n", envname);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001824 return 1;
1825 }
Cyril Bontéac92a062014-12-27 22:28:38 +01001826 ret = snprintf(check->envp[idx], len + 1, "%s=%s", envname, value);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001827 if (ret < 0) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001828 ha_alert("Failed to store the environment variable '%s'. Reason : %s. Aborting.\n", envname, strerror(errno));
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001829 return 1;
1830 }
Cyril Bontéac92a062014-12-27 22:28:38 +01001831 else if (ret > len) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001832 ha_alert("Environment variable '%s' was truncated. Aborting.\n", envname);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001833 return 1;
1834 }
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001835 return 0;
1836}
Simon Horman98637e52014-06-20 12:30:16 +09001837
1838static int prepare_external_check(struct check *check)
1839{
1840 struct server *s = check->server;
1841 struct proxy *px = s->proxy;
1842 struct listener *listener = NULL, *l;
1843 int i;
Simon Horman98637e52014-06-20 12:30:16 +09001844 const char *path = px->check_path ? px->check_path : DEF_CHECK_PATH;
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001845 char buf[256];
Simon Horman98637e52014-06-20 12:30:16 +09001846
1847 list_for_each_entry(l, &px->conf.listeners, by_fe)
1848 /* Use the first INET, INET6 or UNIX listener */
1849 if (l->addr.ss_family == AF_INET ||
1850 l->addr.ss_family == AF_INET6 ||
1851 l->addr.ss_family == AF_UNIX) {
1852 listener = l;
1853 break;
1854 }
1855
Simon Horman98637e52014-06-20 12:30:16 +09001856 check->curpid = NULL;
Cyril Bontéac92a062014-12-27 22:28:38 +01001857 check->envp = calloc((EXTCHK_SIZE + 1), sizeof(char *));
1858 if (!check->envp) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001859 ha_alert("Failed to allocate memory for environment variables. Aborting\n");
Cyril Bontéac92a062014-12-27 22:28:38 +01001860 goto err;
1861 }
Simon Horman98637e52014-06-20 12:30:16 +09001862
Cyril Bontéac92a062014-12-27 22:28:38 +01001863 check->argv = calloc(6, sizeof(char *));
1864 if (!check->argv) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001865 ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id);
Simon Horman98637e52014-06-20 12:30:16 +09001866 goto err;
Cyril Bontéac92a062014-12-27 22:28:38 +01001867 }
Simon Horman98637e52014-06-20 12:30:16 +09001868
1869 check->argv[0] = px->check_command;
1870
Cyril Bonté777be862014-12-02 21:21:35 +01001871 if (!listener) {
1872 check->argv[1] = strdup("NOT_USED");
1873 check->argv[2] = strdup("NOT_USED");
1874 }
1875 else if (listener->addr.ss_family == AF_INET ||
Simon Horman98637e52014-06-20 12:30:16 +09001876 listener->addr.ss_family == AF_INET6) {
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001877 addr_to_str(&listener->addr, buf, sizeof(buf));
1878 check->argv[1] = strdup(buf);
1879 port_to_str(&listener->addr, buf, sizeof(buf));
1880 check->argv[2] = strdup(buf);
Cyril Bonté777be862014-12-02 21:21:35 +01001881 }
1882 else if (listener->addr.ss_family == AF_UNIX) {
Simon Horman98637e52014-06-20 12:30:16 +09001883 const struct sockaddr_un *un;
1884
1885 un = (struct sockaddr_un *)&listener->addr;
1886 check->argv[1] = strdup(un->sun_path);
1887 check->argv[2] = strdup("NOT_USED");
Cyril Bonté777be862014-12-02 21:21:35 +01001888 }
1889 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001890 ha_alert("Starting [%s:%s] check: unsupported address family.\n", px->id, s->id);
Simon Horman98637e52014-06-20 12:30:16 +09001891 goto err;
1892 }
1893
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001894 addr_to_str(&s->addr, buf, sizeof(buf));
1895 check->argv[3] = strdup(buf);
Willy Tarreau04276f32017-01-06 17:41:29 +01001896
1897 if (s->addr.ss_family == AF_INET || s->addr.ss_family == AF_INET6)
1898 snprintf(buf, sizeof(buf), "%u", s->svc_port);
1899 else
1900 *buf = 0;
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001901 check->argv[4] = strdup(buf);
Simon Horman98637e52014-06-20 12:30:16 +09001902
Cyril Bontéac92a062014-12-27 22:28:38 +01001903 for (i = 0; i < 5; i++) {
1904 if (!check->argv[i]) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001905 ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id);
Simon Horman98637e52014-06-20 12:30:16 +09001906 goto err;
Cyril Bontéac92a062014-12-27 22:28:38 +01001907 }
1908 }
Simon Horman98637e52014-06-20 12:30:16 +09001909
Cyril Bontéac92a062014-12-27 22:28:38 +01001910 EXTCHK_SETENV(check, EXTCHK_PATH, path, err);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001911 /* Add proxy environment variables */
Cyril Bontéac92a062014-12-27 22:28:38 +01001912 EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_NAME, px->id, err);
1913 EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_ID, ultoa_r(px->uuid, buf, sizeof(buf)), err);
1914 EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_ADDR, check->argv[1], err);
1915 EXTCHK_SETENV(check, EXTCHK_HAPROXY_PROXY_PORT, check->argv[2], err);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001916 /* Add server environment variables */
Cyril Bontéac92a062014-12-27 22:28:38 +01001917 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_NAME, s->id, err);
1918 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_ID, ultoa_r(s->puid, buf, sizeof(buf)), err);
1919 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_ADDR, check->argv[3], err);
1920 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_PORT, check->argv[4], err);
1921 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_MAXCONN, ultoa_r(s->maxconn, buf, sizeof(buf)), err);
1922 EXTCHK_SETENV(check, EXTCHK_HAPROXY_SERVER_CURCONN, ultoa_r(s->cur_sess, buf, sizeof(buf)), err);
1923
1924 /* Ensure that we don't leave any hole in check->envp */
1925 for (i = 0; i < EXTCHK_SIZE; i++)
1926 if (!check->envp[i])
1927 EXTCHK_SETENV(check, i, "", err);
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001928
Cyril Bonté99c5bf52014-08-07 01:55:38 +02001929 return 1;
Simon Horman98637e52014-06-20 12:30:16 +09001930err:
1931 if (check->envp) {
Cyril Bontéac92a062014-12-27 22:28:38 +01001932 for (i = 0; i < EXTCHK_SIZE; i++)
Cyril Bonté9ede66b2014-12-02 21:21:36 +01001933 free(check->envp[i]);
Simon Horman98637e52014-06-20 12:30:16 +09001934 free(check->envp);
1935 check->envp = NULL;
1936 }
1937
1938 if (check->argv) {
1939 for (i = 1; i < 5; i++)
1940 free(check->argv[i]);
1941 free(check->argv);
1942 check->argv = NULL;
1943 }
Cyril Bonté99c5bf52014-08-07 01:55:38 +02001944 return 0;
Simon Horman98637e52014-06-20 12:30:16 +09001945}
1946
Simon Hormanb00d17a2014-06-13 16:18:16 +09001947/*
Simon Horman98637e52014-06-20 12:30:16 +09001948 * establish a server health-check that makes use of a process.
1949 *
1950 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001951 * - SF_ERR_NONE if everything's OK
Willy Tarreaue7dff022015-04-03 01:14:29 +02001952 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
Tim Düsterhus4896c442016-11-29 02:15:19 +01001953 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Simon Horman98637e52014-06-20 12:30:16 +09001954 *
1955 * Blocks and then unblocks SIGCHLD
1956 */
1957static int connect_proc_chk(struct task *t)
1958{
Cyril Bontéac92a062014-12-27 22:28:38 +01001959 char buf[256];
Simon Horman98637e52014-06-20 12:30:16 +09001960 struct check *check = t->context;
1961 struct server *s = check->server;
1962 struct proxy *px = s->proxy;
1963 int status;
1964 pid_t pid;
1965
Willy Tarreaue7dff022015-04-03 01:14:29 +02001966 status = SF_ERR_RESOURCE;
Simon Horman98637e52014-06-20 12:30:16 +09001967
1968 block_sigchld();
1969
1970 pid = fork();
1971 if (pid < 0) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001972 ha_alert("Failed to fork process for external health check: %s. Aborting.\n",
1973 strerror(errno));
Simon Horman98637e52014-06-20 12:30:16 +09001974 set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno));
1975 goto out;
1976 }
1977 if (pid == 0) {
1978 /* Child */
1979 extern char **environ;
Willy Tarreau9f6dc722019-03-01 11:15:10 +01001980 struct rlimit limit;
Willy Tarreaub7b24782016-06-21 15:32:29 +02001981 int fd;
1982
1983 /* close all FDs. Keep stdin/stdout/stderr in verbose mode */
1984 fd = (global.mode & (MODE_QUIET|MODE_VERBOSE)) == MODE_QUIET ? 0 : 3;
1985
Willy Tarreau2555ccf2019-02-21 22:22:06 +01001986 my_closefrom(fd);
Willy Tarreaub7b24782016-06-21 15:32:29 +02001987
Willy Tarreau9f6dc722019-03-01 11:15:10 +01001988 /* restore the initial FD limits */
1989 limit.rlim_cur = rlim_fd_cur_at_boot;
1990 limit.rlim_max = rlim_fd_max_at_boot;
1991 if (setrlimit(RLIMIT_NOFILE, &limit) == -1) {
1992 getrlimit(RLIMIT_NOFILE, &limit);
1993 ha_warning("External check: failed to restore initial FD limits (cur=%u max=%u), using cur=%u max=%u\n",
1994 rlim_fd_cur_at_boot, rlim_fd_max_at_boot,
1995 (unsigned int)limit.rlim_cur, (unsigned int)limit.rlim_max);
1996 }
1997
Simon Horman98637e52014-06-20 12:30:16 +09001998 environ = check->envp;
Cyril Bontéac92a062014-12-27 22:28:38 +01001999 extchk_setenv(check, EXTCHK_HAPROXY_SERVER_CURCONN, ultoa_r(s->cur_sess, buf, sizeof(buf)));
Simon Horman98637e52014-06-20 12:30:16 +09002000 execvp(px->check_command, check->argv);
Christopher Faulet767a84b2017-11-24 16:50:31 +01002001 ha_alert("Failed to exec process for external health check: %s. Aborting.\n",
2002 strerror(errno));
Simon Horman98637e52014-06-20 12:30:16 +09002003 exit(-1);
2004 }
2005
2006 /* Parent */
2007 if (check->result == CHK_RES_UNKNOWN) {
2008 if (pid_list_add(pid, t) != NULL) {
2009 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
2010
2011 if (px->timeout.check && px->timeout.connect) {
2012 int t_con = tick_add(now_ms, px->timeout.connect);
2013 t->expire = tick_first(t->expire, t_con);
2014 }
Willy Tarreaue7dff022015-04-03 01:14:29 +02002015 status = SF_ERR_NONE;
Simon Horman98637e52014-06-20 12:30:16 +09002016 goto out;
2017 }
2018 else {
2019 set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno));
2020 }
2021 kill(pid, SIGTERM); /* process creation error */
2022 }
2023 else
2024 set_server_check_status(check, HCHK_STATUS_SOCKERR, strerror(errno));
2025
2026out:
2027 unblock_sigchld();
2028 return status;
2029}
2030
2031/*
Willy Tarreau1e62e2a2017-10-04 15:07:02 +02002032 * manages a server health-check that uses an external process. Returns
Willy Tarreaubaaee002006-06-26 02:48:02 +02002033 * the time the task accepts to wait, or TIME_ETERNITY for infinity.
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002034 *
2035 * Please do NOT place any return statement in this function and only leave
2036 * via the out_unlock label.
Willy Tarreaubaaee002006-06-26 02:48:02 +02002037 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02002038static struct task *process_chk_proc(struct task *t, void *context, unsigned short state)
Simon Horman98637e52014-06-20 12:30:16 +09002039{
Olivier Houchard9f6af332018-05-25 14:04:04 +02002040 struct check *check = context;
Simon Horman98637e52014-06-20 12:30:16 +09002041 struct server *s = check->server;
Simon Horman98637e52014-06-20 12:30:16 +09002042 int rv;
2043 int ret;
2044 int expired = tick_is_expired(t->expire, now_ms);
2045
Christopher Faulet2a944ee2017-11-07 10:42:54 +01002046 HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock);
Simon Horman98637e52014-06-20 12:30:16 +09002047 if (!(check->state & CHK_ST_INPROGRESS)) {
2048 /* no check currently running */
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002049 if (!expired) /* woke up too early */
2050 goto out_unlock;
Simon Horman98637e52014-06-20 12:30:16 +09002051
2052 /* we don't send any health-checks when the proxy is
2053 * stopped, the server should not be checked or the check
2054 * is disabled.
2055 */
2056 if (((check->state & (CHK_ST_ENABLED | CHK_ST_PAUSED)) != CHK_ST_ENABLED) ||
2057 s->proxy->state == PR_STSTOPPED)
2058 goto reschedule;
2059
2060 /* we'll initiate a new check */
2061 set_server_check_status(check, HCHK_STATUS_START, NULL);
2062
2063 check->state |= CHK_ST_INPROGRESS;
2064
Simon Hormandbf70192015-01-30 11:22:53 +09002065 ret = connect_proc_chk(t);
Willy Tarreaud7c3fbd2017-10-04 15:19:26 +02002066 if (ret == SF_ERR_NONE) {
Willy Tarreau1e62e2a2017-10-04 15:07:02 +02002067 /* the process was forked, we allow up to min(inter,
2068 * timeout.connect) for it to report its status, but
2069 * only when timeout.check is set as it may be to short
2070 * for a full check otherwise.
Simon Horman98637e52014-06-20 12:30:16 +09002071 */
2072 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
2073
2074 if (s->proxy->timeout.check && s->proxy->timeout.connect) {
2075 int t_con = tick_add(now_ms, s->proxy->timeout.connect);
2076 t->expire = tick_first(t->expire, t_con);
2077 }
Christopher Faulet88ce5d12017-10-20 15:41:18 +02002078 task_set_affinity(t, tid_bit);
Simon Horman98637e52014-06-20 12:30:16 +09002079 goto reschedule;
Simon Horman98637e52014-06-20 12:30:16 +09002080 }
2081
Willy Tarreau1e62e2a2017-10-04 15:07:02 +02002082 /* here, we failed to start the check */
Simon Horman98637e52014-06-20 12:30:16 +09002083
2084 check->state &= ~CHK_ST_INPROGRESS;
2085 check_notify_failure(check);
2086
2087 /* we allow up to min(inter, timeout.connect) for a connection
2088 * to establish but only when timeout.check is set
2089 * as it may be to short for a full check otherwise
2090 */
2091 while (tick_is_expired(t->expire, now_ms)) {
2092 int t_con;
2093
2094 t_con = tick_add(t->expire, s->proxy->timeout.connect);
2095 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
2096
2097 if (s->proxy->timeout.check)
2098 t->expire = tick_first(t->expire, t_con);
2099 }
2100 }
2101 else {
2102 /* there was a test running.
2103 * First, let's check whether there was an uncaught error,
2104 * which can happen on connect timeout or error.
2105 */
2106 if (check->result == CHK_RES_UNKNOWN) {
2107 /* good connection is enough for pure TCP check */
2108 struct pid_list *elem = check->curpid;
2109 int status = HCHK_STATUS_UNKNOWN;
2110
2111 if (elem->exited) {
2112 status = elem->status; /* Save in case the process exits between use below */
2113 if (!WIFEXITED(status))
2114 check->code = -1;
2115 else
2116 check->code = WEXITSTATUS(status);
2117 if (!WIFEXITED(status) || WEXITSTATUS(status))
2118 status = HCHK_STATUS_PROCERR;
2119 else
2120 status = HCHK_STATUS_PROCOK;
2121 } else if (expired) {
2122 status = HCHK_STATUS_PROCTOUT;
Christopher Faulet767a84b2017-11-24 16:50:31 +01002123 ha_warning("kill %d\n", (int)elem->pid);
Simon Horman98637e52014-06-20 12:30:16 +09002124 kill(elem->pid, SIGTERM);
2125 }
2126 set_server_check_status(check, status, NULL);
2127 }
2128
2129 if (check->result == CHK_RES_FAILED) {
2130 /* a failure or timeout detected */
2131 check_notify_failure(check);
2132 }
2133 else if (check->result == CHK_RES_CONDPASS) {
2134 /* check is OK but asks for stopping mode */
2135 check_notify_stopping(check);
2136 }
2137 else if (check->result == CHK_RES_PASSED) {
2138 /* a success was detected */
2139 check_notify_success(check);
2140 }
Christopher Faulet88ce5d12017-10-20 15:41:18 +02002141 task_set_affinity(t, MAX_THREADS_MASK);
Simon Horman98637e52014-06-20 12:30:16 +09002142 check->state &= ~CHK_ST_INPROGRESS;
2143
2144 pid_list_del(check->curpid);
2145
2146 rv = 0;
2147 if (global.spread_checks > 0) {
2148 rv = srv_getinter(check) * global.spread_checks / 100;
2149 rv -= (int) (2 * rv * (rand() / (RAND_MAX + 1.0)));
2150 }
2151 t->expire = tick_add(now_ms, MS_TO_TICKS(srv_getinter(check) + rv));
2152 }
2153
2154 reschedule:
2155 while (tick_is_expired(t->expire, now_ms))
2156 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002157
2158 out_unlock:
Christopher Faulet2a944ee2017-11-07 10:42:54 +01002159 HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock);
Simon Horman98637e52014-06-20 12:30:16 +09002160 return t;
2161}
2162
2163/*
2164 * manages a server health-check that uses a connection. Returns
2165 * the time the task accepts to wait, or TIME_ETERNITY for infinity.
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002166 *
2167 * Please do NOT place any return statement in this function and only leave
2168 * via the out_unlock label.
Simon Horman98637e52014-06-20 12:30:16 +09002169 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02002170static struct task *process_chk_conn(struct task *t, void *context, unsigned short state)
Willy Tarreaubaaee002006-06-26 02:48:02 +02002171{
Olivier Houchard9f6af332018-05-25 14:04:04 +02002172 struct check *check = context;
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002173 struct proxy *proxy = check->proxy;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002174 struct conn_stream *cs = check->cs;
2175 struct connection *conn = cs_conn(cs);
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002176 int rv;
Willy Tarreaufb56aab2012-09-28 14:40:02 +02002177 int ret;
Willy Tarreauacbdc7a2012-11-23 14:02:10 +01002178 int expired = tick_is_expired(t->expire, now_ms);
Willy Tarreaubaaee002006-06-26 02:48:02 +02002179
Olivier Houchard0923fa42019-01-11 18:43:04 +01002180 if (check->server)
2181 HA_SPIN_LOCK(SERVER_LOCK, &check->server->lock);
Willy Tarreau2c115e52013-12-11 19:41:16 +01002182 if (!(check->state & CHK_ST_INPROGRESS)) {
Willy Tarreau5a78f362012-11-23 12:47:05 +01002183 /* no check currently running */
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002184 if (!expired) /* woke up too early */
2185 goto out_unlock;
Willy Tarreaubaaee002006-06-26 02:48:02 +02002186
Simon Horman671b6f02013-11-25 10:46:39 +09002187 /* we don't send any health-checks when the proxy is
2188 * stopped, the server should not be checked or the check
2189 * is disabled.
Willy Tarreaubaaee002006-06-26 02:48:02 +02002190 */
Willy Tarreau0d924cc2013-12-11 21:26:24 +01002191 if (((check->state & (CHK_ST_ENABLED | CHK_ST_PAUSED)) != CHK_ST_ENABLED) ||
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002192 proxy->state == PR_STSTOPPED)
Willy Tarreau5a78f362012-11-23 12:47:05 +01002193 goto reschedule;
Willy Tarreaubaaee002006-06-26 02:48:02 +02002194
2195 /* we'll initiate a new check */
Simon Horman4a741432013-02-23 15:35:38 +09002196 set_server_check_status(check, HCHK_STATUS_START, NULL);
Willy Tarreau1ae1b7b2012-09-28 15:28:30 +02002197
Willy Tarreau2c115e52013-12-11 19:41:16 +01002198 check->state |= CHK_ST_INPROGRESS;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002199 b_reset(&check->bi);
2200 b_reset(&check->bo);
Willy Tarreau1ae1b7b2012-09-28 15:28:30 +02002201
Simon Hormandbf70192015-01-30 11:22:53 +09002202 ret = connect_conn_chk(t);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002203 cs = check->cs;
2204 conn = cs_conn(cs);
Willy Tarreau00149122017-10-04 18:05:01 +02002205
Willy Tarreaufb56aab2012-09-28 14:40:02 +02002206 switch (ret) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02002207 case SF_ERR_UP:
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002208 goto out_unlock;
2209
Willy Tarreaue7dff022015-04-03 01:14:29 +02002210 case SF_ERR_NONE:
Willy Tarreaufb56aab2012-09-28 14:40:02 +02002211 /* we allow up to min(inter, timeout.connect) for a connection
2212 * to establish but only when timeout.check is set
2213 * as it may be to short for a full check otherwise
2214 */
Simon Horman4a741432013-02-23 15:35:38 +09002215 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
Krzysztof Piotr Oledzki09605412009-09-23 22:09:24 +02002216
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002217 if (proxy->timeout.check && proxy->timeout.connect) {
2218 int t_con = tick_add(now_ms, proxy->timeout.connect);
Willy Tarreaufb56aab2012-09-28 14:40:02 +02002219 t->expire = tick_first(t->expire, t_con);
Willy Tarreaubaaee002006-06-26 02:48:02 +02002220 }
Willy Tarreau06559ac2013-12-05 01:53:08 +01002221
Olivier Houchard53216e72018-10-10 15:46:36 +02002222 if (check->type)
Olivier Houchardaf4021e2018-08-09 13:06:55 +02002223 __event_srv_chk_r(cs);
Willy Tarreau06559ac2013-12-05 01:53:08 +01002224
Christopher Faulet88ce5d12017-10-20 15:41:18 +02002225 task_set_affinity(t, tid_bit);
Willy Tarreau5a78f362012-11-23 12:47:05 +01002226 goto reschedule;
2227
Willy Tarreaue7dff022015-04-03 01:14:29 +02002228 case SF_ERR_SRVTO: /* ETIMEDOUT */
2229 case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */
Willy Tarreau00149122017-10-04 18:05:01 +02002230 if (conn)
2231 conn->flags |= CO_FL_ERROR;
Willy Tarreaub5259bf2017-10-04 14:47:29 +02002232 chk_report_conn_err(check, errno, 0);
Willy Tarreau5a78f362012-11-23 12:47:05 +01002233 break;
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02002234 /* should share same code than cases below */
2235 case SF_ERR_CHK_PORT:
2236 check->state |= CHK_ST_PORT_MISS;
Willy Tarreaue7dff022015-04-03 01:14:29 +02002237 case SF_ERR_PRXCOND:
2238 case SF_ERR_RESOURCE:
2239 case SF_ERR_INTERNAL:
Willy Tarreau00149122017-10-04 18:05:01 +02002240 if (conn)
2241 conn->flags |= CO_FL_ERROR;
2242 chk_report_conn_err(check, conn ? 0 : ENOMEM, 0);
Willy Tarreau5a78f362012-11-23 12:47:05 +01002243 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +02002244 }
2245
Willy Tarreau5a78f362012-11-23 12:47:05 +01002246 /* here, we have seen a synchronous error, no fd was allocated */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002247 if (cs) {
Olivier Houchard49065542019-05-31 19:20:36 +02002248 if (check->wait_list.events)
2249 cs->conn->xprt->unsubscribe(cs->conn,
2250 cs->conn->xprt_ctx,
2251 check->wait_list.events,
2252 &check->wait_list);
2253 /* We may have been scheduled to run, and the
2254 * I/O handler expects to have a cs, so remove
2255 * the tasklet
2256 */
Willy Tarreau86eded62019-06-14 14:47:49 +02002257 tasklet_remove_from_tasklet_list(check->wait_list.tasklet);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002258 cs_destroy(cs);
2259 cs = check->cs = NULL;
2260 conn = NULL;
Olivier Houchard390485a2017-10-24 19:03:30 +02002261 }
Willy Tarreau6b0a8502012-11-23 08:51:32 +01002262
Willy Tarreau2c115e52013-12-11 19:41:16 +01002263 check->state &= ~CHK_ST_INPROGRESS;
Willy Tarreau4eec5472014-05-20 22:32:27 +02002264 check_notify_failure(check);
Willy Tarreaubaaee002006-06-26 02:48:02 +02002265
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +01002266 /* we allow up to min(inter, timeout.connect) for a connection
2267 * to establish but only when timeout.check is set
2268 * as it may be to short for a full check otherwise
2269 */
Willy Tarreau0c303ee2008-07-07 00:09:58 +02002270 while (tick_is_expired(t->expire, now_ms)) {
2271 int t_con;
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +01002272
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002273 t_con = tick_add(t->expire, proxy->timeout.connect);
Simon Horman4a741432013-02-23 15:35:38 +09002274 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +01002275
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002276 if (proxy->timeout.check)
Willy Tarreau0c303ee2008-07-07 00:09:58 +02002277 t->expire = tick_first(t->expire, t_con);
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +01002278 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02002279 }
2280 else {
Willy Tarreauf1503172012-09-28 19:39:36 +02002281 /* there was a test running.
2282 * First, let's check whether there was an uncaught error,
2283 * which can happen on connect timeout or error.
2284 */
Simon Hormanccaabcd2014-06-20 12:29:47 +09002285 if (check->result == CHK_RES_UNKNOWN) {
Willy Tarreau25e2ab52013-12-04 11:17:05 +01002286 /* good connection is enough for pure TCP check */
2287 if ((conn->flags & CO_FL_CONNECTED) && !check->type) {
Simon Horman4a741432013-02-23 15:35:38 +09002288 if (check->use_ssl)
2289 set_server_check_status(check, HCHK_STATUS_L6OK, NULL);
Willy Tarreauf1503172012-09-28 19:39:36 +02002290 else
Simon Horman4a741432013-02-23 15:35:38 +09002291 set_server_check_status(check, HCHK_STATUS_L4OK, NULL);
Willy Tarreauacbdc7a2012-11-23 14:02:10 +01002292 }
Willy Tarreau4ff3b892017-10-16 15:17:17 +02002293 else if ((conn->flags & CO_FL_ERROR) || cs->flags & CS_FL_ERROR || expired) {
Willy Tarreaub5259bf2017-10-04 14:47:29 +02002294 chk_report_conn_err(check, 0, expired);
Willy Tarreauf1503172012-09-28 19:39:36 +02002295 }
Willy Tarreau74fa7fb2012-11-23 14:43:49 +01002296 else
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002297 goto out_unlock; /* timeout not reached, wait again */
Willy Tarreauf1503172012-09-28 19:39:36 +02002298 }
2299
Willy Tarreau74fa7fb2012-11-23 14:43:49 +01002300 /* check complete or aborted */
Willy Tarreau00149122017-10-04 18:05:01 +02002301 if (conn && conn->xprt) {
Willy Tarreau5ba04f62013-02-12 15:23:12 +01002302 /* The check was aborted and the connection was not yet closed.
2303 * This can happen upon timeout, or when an external event such
2304 * as a failed response coupled with "observe layer7" caused the
2305 * server state to be suddenly changed.
2306 */
Willy Tarreaud85c4852015-03-13 00:40:28 +01002307 conn_sock_drain(conn);
Willy Tarreaua553ae92017-10-05 18:52:17 +02002308 cs_close(cs);
Willy Tarreau5ba04f62013-02-12 15:23:12 +01002309 }
2310
Willy Tarreauac59f362017-10-08 11:10:19 +02002311 if (cs) {
Olivier Houchard49065542019-05-31 19:20:36 +02002312 if (check->wait_list.events)
2313 cs->conn->xprt->unsubscribe(cs->conn,
2314 cs->conn->xprt_ctx,
2315 check->wait_list.events,
2316 &check->wait_list);
2317 /* We may have been scheduled to run, and the
Willy Tarreau86eded62019-06-14 14:47:49 +02002318 * I/O handler expects to have a cs, so remove
2319 * the tasklet
2320 */
2321 tasklet_remove_from_tasklet_list(check->wait_list.tasklet);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002322 cs_destroy(cs);
2323 cs = check->cs = NULL;
2324 conn = NULL;
Willy Tarreau00149122017-10-04 18:05:01 +02002325 }
2326
Olivier Houchard0923fa42019-01-11 18:43:04 +01002327 if (check->server) {
2328 if (check->result == CHK_RES_FAILED) {
2329 /* a failure or timeout detected */
2330 check_notify_failure(check);
2331 }
2332 else if (check->result == CHK_RES_CONDPASS) {
2333 /* check is OK but asks for stopping mode */
2334 check_notify_stopping(check);
2335 }
2336 else if (check->result == CHK_RES_PASSED) {
2337 /* a success was detected */
2338 check_notify_success(check);
2339 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02002340 }
Christopher Faulet88ce5d12017-10-20 15:41:18 +02002341 task_set_affinity(t, MAX_THREADS_MASK);
Willy Tarreau2c115e52013-12-11 19:41:16 +01002342 check->state &= ~CHK_ST_INPROGRESS;
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002343
Olivier Houchard0923fa42019-01-11 18:43:04 +01002344 if (check->server) {
2345 rv = 0;
2346 if (global.spread_checks > 0) {
2347 rv = srv_getinter(check) * global.spread_checks / 100;
2348 rv -= (int) (2 * rv * (rand() / (RAND_MAX + 1.0)));
2349 }
2350 t->expire = tick_add(now_ms, MS_TO_TICKS(srv_getinter(check) + rv));
Willy Tarreaubaaee002006-06-26 02:48:02 +02002351 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02002352 }
Willy Tarreau5a78f362012-11-23 12:47:05 +01002353
2354 reschedule:
2355 while (tick_is_expired(t->expire, now_ms))
Simon Horman4a741432013-02-23 15:35:38 +09002356 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002357 out_unlock:
Olivier Houchard0923fa42019-01-11 18:43:04 +01002358 if (check->server)
2359 HA_SPIN_UNLOCK(SERVER_LOCK, &check->server->lock);
Willy Tarreau26c25062009-03-08 09:38:41 +01002360 return t;
Willy Tarreaubaaee002006-06-26 02:48:02 +02002361}
2362
Simon Horman98637e52014-06-20 12:30:16 +09002363/*
2364 * manages a server health-check. Returns
2365 * the time the task accepts to wait, or TIME_ETERNITY for infinity.
2366 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02002367static struct task *process_chk(struct task *t, void *context, unsigned short state)
Simon Horman98637e52014-06-20 12:30:16 +09002368{
Olivier Houchard9f6af332018-05-25 14:04:04 +02002369 struct check *check = context;
Simon Horman98637e52014-06-20 12:30:16 +09002370
2371 if (check->type == PR_O2_EXT_CHK)
Olivier Houchard9f6af332018-05-25 14:04:04 +02002372 return process_chk_proc(t, context, state);
2373 return process_chk_conn(t, context, state);
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002374
Simon Horman98637e52014-06-20 12:30:16 +09002375}
2376
Simon Horman5c942422013-11-25 10:46:32 +09002377static int start_check_task(struct check *check, int mininter,
2378 int nbcheck, int srvpos)
2379{
2380 struct task *t;
2381 /* task for the check */
Emeric Brunc60def82017-09-27 14:59:38 +02002382 if ((t = task_new(MAX_THREADS_MASK)) == NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002383 ha_alert("Starting [%s:%s] check: out of memory.\n",
2384 check->server->proxy->id, check->server->id);
Simon Horman5c942422013-11-25 10:46:32 +09002385 return 0;
2386 }
2387
2388 check->task = t;
2389 t->process = process_chk;
2390 t->context = check;
2391
Willy Tarreau1746eec2014-04-25 10:46:47 +02002392 if (mininter < srv_getinter(check))
2393 mininter = srv_getinter(check);
2394
2395 if (global.max_spread_checks && mininter > global.max_spread_checks)
2396 mininter = global.max_spread_checks;
2397
Simon Horman5c942422013-11-25 10:46:32 +09002398 /* check this every ms */
Willy Tarreau1746eec2014-04-25 10:46:47 +02002399 t->expire = tick_add(now_ms, MS_TO_TICKS(mininter * srvpos / nbcheck));
Simon Horman5c942422013-11-25 10:46:32 +09002400 check->start = now;
2401 task_queue(t);
2402
2403 return 1;
2404}
2405
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002406/*
2407 * Start health-check.
Willy Tarreau865c5142016-12-21 20:04:48 +01002408 * Returns 0 if OK, ERR_FATAL on error, and prints the error in this case.
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002409 */
Willy Tarreau865c5142016-12-21 20:04:48 +01002410static int start_checks()
2411{
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002412
2413 struct proxy *px;
2414 struct server *s;
2415 struct task *t;
Simon Horman4a741432013-02-23 15:35:38 +09002416 int nbcheck=0, mininter=0, srvpos=0;
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002417
Willy Tarreau2c43a1e2007-10-14 23:05:39 +02002418 /* 1- count the checkers to run simultaneously.
2419 * We also determine the minimum interval among all of those which
2420 * have an interval larger than SRV_CHK_INTER_THRES. This interval
2421 * will be used to spread their start-up date. Those which have
Jamie Gloudon801a0a32012-08-25 00:18:33 -04002422 * a shorter interval will start independently and will not dictate
Willy Tarreau2c43a1e2007-10-14 23:05:39 +02002423 * too short an interval for all others.
2424 */
Olivier Houchardfbc74e82017-11-24 16:54:05 +01002425 for (px = proxies_list; px; px = px->next) {
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002426 for (s = px->srv; s; s = s->next) {
Willy Tarreaue7b73482013-11-21 11:50:50 +01002427 if (s->slowstart) {
Emeric Brunc60def82017-09-27 14:59:38 +02002428 if ((t = task_new(MAX_THREADS_MASK)) == NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002429 ha_alert("Starting [%s:%s] check: out of memory.\n", px->id, s->id);
Willy Tarreau865c5142016-12-21 20:04:48 +01002430 return ERR_ALERT | ERR_FATAL;
Willy Tarreaue7b73482013-11-21 11:50:50 +01002431 }
2432 /* We need a warmup task that will be called when the server
2433 * state switches from down to up.
2434 */
2435 s->warmup = t;
2436 t->process = server_warmup;
2437 t->context = s;
Baptiste Assmann6076d1c2015-09-17 22:53:59 +02002438 /* server can be in this state only because of */
Emeric Brun52a91d32017-08-31 14:41:55 +02002439 if (s->next_state == SRV_ST_STARTING)
Baptiste Assmann6076d1c2015-09-17 22:53:59 +02002440 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 +01002441 }
2442
Willy Tarreaud8514a22013-12-11 21:10:14 +01002443 if (s->check.state & CHK_ST_CONFIGURED) {
2444 nbcheck++;
2445 if ((srv_getinter(&s->check) >= SRV_CHK_INTER_THRES) &&
2446 (!mininter || mininter > srv_getinter(&s->check)))
2447 mininter = srv_getinter(&s->check);
2448 }
Willy Tarreau15f39102013-12-11 20:41:18 +01002449
Willy Tarreaud8514a22013-12-11 21:10:14 +01002450 if (s->agent.state & CHK_ST_CONFIGURED) {
2451 nbcheck++;
2452 if ((srv_getinter(&s->agent) >= SRV_CHK_INTER_THRES) &&
2453 (!mininter || mininter > srv_getinter(&s->agent)))
2454 mininter = srv_getinter(&s->agent);
2455 }
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002456 }
2457 }
2458
Simon Horman4a741432013-02-23 15:35:38 +09002459 if (!nbcheck)
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002460 return 0;
2461
2462 srand((unsigned)time(NULL));
2463
2464 /*
2465 * 2- start them as far as possible from each others. For this, we will
2466 * start them after their interval set to the min interval divided by
2467 * the number of servers, weighted by the server's position in the list.
2468 */
Olivier Houchardfbc74e82017-11-24 16:54:05 +01002469 for (px = proxies_list; px; px = px->next) {
Simon Horman98637e52014-06-20 12:30:16 +09002470 if ((px->options2 & PR_O2_CHK_ANY) == PR_O2_EXT_CHK) {
2471 if (init_pid_list()) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002472 ha_alert("Starting [%s] check: out of memory.\n", px->id);
Willy Tarreau865c5142016-12-21 20:04:48 +01002473 return ERR_ALERT | ERR_FATAL;
Simon Horman98637e52014-06-20 12:30:16 +09002474 }
2475 }
2476
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002477 for (s = px->srv; s; s = s->next) {
Simon Hormand60d6912013-11-25 10:46:36 +09002478 /* A task for the main check */
Willy Tarreauff5ae352013-12-11 20:36:34 +01002479 if (s->check.state & CHK_ST_CONFIGURED) {
Cyril Bonté99c5bf52014-08-07 01:55:38 +02002480 if (s->check.type == PR_O2_EXT_CHK) {
2481 if (!prepare_external_check(&s->check))
Willy Tarreau865c5142016-12-21 20:04:48 +01002482 return ERR_ALERT | ERR_FATAL;
Cyril Bonté99c5bf52014-08-07 01:55:38 +02002483 }
Simon Hormand60d6912013-11-25 10:46:36 +09002484 if (!start_check_task(&s->check, mininter, nbcheck, srvpos))
Willy Tarreau865c5142016-12-21 20:04:48 +01002485 return ERR_ALERT | ERR_FATAL;
Simon Hormand60d6912013-11-25 10:46:36 +09002486 srvpos++;
2487 }
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002488
Simon Hormand60d6912013-11-25 10:46:36 +09002489 /* A task for a auxiliary agent check */
Willy Tarreauff5ae352013-12-11 20:36:34 +01002490 if (s->agent.state & CHK_ST_CONFIGURED) {
Simon Hormand60d6912013-11-25 10:46:36 +09002491 if (!start_check_task(&s->agent, mininter, nbcheck, srvpos)) {
Willy Tarreau865c5142016-12-21 20:04:48 +01002492 return ERR_ALERT | ERR_FATAL;
Simon Hormand60d6912013-11-25 10:46:36 +09002493 }
2494 srvpos++;
2495 }
Krzysztof Oledzkib304dc72007-10-14 23:40:01 +02002496 }
2497 }
2498 return 0;
2499}
Willy Tarreaubaaee002006-06-26 02:48:02 +02002500
2501/*
Willy Tarreau5b3a2022012-09-28 15:01:02 +02002502 * Perform content verification check on data in s->check.buffer buffer.
Willy Tarreaubd741542010-03-16 18:46:54 +01002503 * The buffer MUST be terminated by a null byte before calling this function.
2504 * Sets server status appropriately. The caller is responsible for ensuring
2505 * that the buffer contains at least 13 characters. If <done> is zero, we may
2506 * return 0 to indicate that data is required to decide of a match.
2507 */
2508static int httpchk_expect(struct server *s, int done)
2509{
Christopher Faulet1bc04c72017-10-29 20:14:08 +01002510 static THREAD_LOCAL char status_msg[] = "HTTP status check returned code <000>";
Willy Tarreaubd741542010-03-16 18:46:54 +01002511 char status_code[] = "000";
2512 char *contentptr;
2513 int crlf;
2514 int ret;
2515
2516 switch (s->proxy->options2 & PR_O2_EXP_TYPE) {
2517 case PR_O2_EXP_STS:
2518 case PR_O2_EXP_RSTS:
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002519 memcpy(status_code, b_head(&s->check.bi) + 9, 3);
2520 memcpy(status_msg + strlen(status_msg) - 4, b_head(&s->check.bi) + 9, 3);
Willy Tarreaubd741542010-03-16 18:46:54 +01002521
2522 if ((s->proxy->options2 & PR_O2_EXP_TYPE) == PR_O2_EXP_STS)
2523 ret = strncmp(s->proxy->expect_str, status_code, 3) == 0;
2524 else
Thierry FOURNIER09af0d62014-06-18 11:35:54 +02002525 ret = regex_exec(s->proxy->expect_regex, status_code);
Willy Tarreaubd741542010-03-16 18:46:54 +01002526
2527 /* we necessarily have the response, so there are no partial failures */
2528 if (s->proxy->options2 & PR_O2_EXP_INV)
2529 ret = !ret;
2530
Simon Horman4a741432013-02-23 15:35:38 +09002531 set_server_check_status(&s->check, ret ? HCHK_STATUS_L7OKD : HCHK_STATUS_L7STS, status_msg);
Willy Tarreaubd741542010-03-16 18:46:54 +01002532 break;
2533
2534 case PR_O2_EXP_STR:
2535 case PR_O2_EXP_RSTR:
2536 /* very simple response parser: ignore CR and only count consecutive LFs,
2537 * stop with contentptr pointing to first char after the double CRLF or
2538 * to '\0' if crlf < 2.
2539 */
2540 crlf = 0;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002541 for (contentptr = b_head(&s->check.bi); *contentptr; contentptr++) {
Willy Tarreaubd741542010-03-16 18:46:54 +01002542 if (crlf >= 2)
2543 break;
2544 if (*contentptr == '\r')
2545 continue;
2546 else if (*contentptr == '\n')
2547 crlf++;
2548 else
2549 crlf = 0;
2550 }
2551
2552 /* Check that response contains a body... */
2553 if (crlf < 2) {
2554 if (!done)
2555 return 0;
2556
Simon Horman4a741432013-02-23 15:35:38 +09002557 set_server_check_status(&s->check, HCHK_STATUS_L7RSP,
Willy Tarreaubd741542010-03-16 18:46:54 +01002558 "HTTP content check could not find a response body");
2559 return 1;
2560 }
2561
2562 /* Check that response body is not empty... */
2563 if (*contentptr == '\0') {
Willy Tarreaua164fb52011-04-13 09:32:41 +02002564 if (!done)
2565 return 0;
2566
Simon Horman4a741432013-02-23 15:35:38 +09002567 set_server_check_status(&s->check, HCHK_STATUS_L7RSP,
Willy Tarreaubd741542010-03-16 18:46:54 +01002568 "HTTP content check found empty response body");
2569 return 1;
2570 }
2571
2572 /* Check the response content against the supplied string
2573 * or regex... */
2574 if ((s->proxy->options2 & PR_O2_EXP_TYPE) == PR_O2_EXP_STR)
2575 ret = strstr(contentptr, s->proxy->expect_str) != NULL;
2576 else
Thierry FOURNIER09af0d62014-06-18 11:35:54 +02002577 ret = regex_exec(s->proxy->expect_regex, contentptr);
Willy Tarreaubd741542010-03-16 18:46:54 +01002578
2579 /* if we don't match, we may need to wait more */
2580 if (!ret && !done)
2581 return 0;
2582
2583 if (ret) {
2584 /* content matched */
2585 if (s->proxy->options2 & PR_O2_EXP_INV)
Simon Horman4a741432013-02-23 15:35:38 +09002586 set_server_check_status(&s->check, HCHK_STATUS_L7RSP,
Willy Tarreaubd741542010-03-16 18:46:54 +01002587 "HTTP check matched unwanted content");
2588 else
Simon Horman4a741432013-02-23 15:35:38 +09002589 set_server_check_status(&s->check, HCHK_STATUS_L7OKD,
Willy Tarreaubd741542010-03-16 18:46:54 +01002590 "HTTP content check matched");
2591 }
2592 else {
2593 if (s->proxy->options2 & PR_O2_EXP_INV)
Simon Horman4a741432013-02-23 15:35:38 +09002594 set_server_check_status(&s->check, HCHK_STATUS_L7OKD,
Willy Tarreaubd741542010-03-16 18:46:54 +01002595 "HTTP check did not match unwanted content");
2596 else
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 content check did not match");
2599 }
2600 break;
2601 }
2602 return 1;
2603}
2604
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002605/*
2606 * return the id of a step in a send/expect session
2607 */
Simon Hormane16c1b32015-01-30 11:22:57 +09002608static int tcpcheck_get_step_id(struct check *check)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002609{
2610 struct tcpcheck_rule *cur = NULL, *next = NULL;
2611 int i = 0;
2612
Willy Tarreau213c6782014-10-02 14:51:02 +02002613 /* not even started anything yet => step 0 = initial connect */
Baptiste Assmannf95bc8e2015-04-25 16:03:06 +02002614 if (!check->current_step)
Willy Tarreau213c6782014-10-02 14:51:02 +02002615 return 0;
2616
Simon Hormane16c1b32015-01-30 11:22:57 +09002617 cur = check->last_started_step;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002618
2619 /* no step => first step */
2620 if (cur == NULL)
2621 return 1;
2622
2623 /* increment i until current step */
Simon Hormane16c1b32015-01-30 11:22:57 +09002624 list_for_each_entry(next, check->tcpcheck_rules, list) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002625 if (next->list.p == &cur->list)
2626 break;
2627 ++i;
2628 }
2629
2630 return i;
2631}
2632
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002633/*
2634 * return the latest known comment before (including) the given stepid
2635 * returns NULL if no comment found
2636 */
2637static char * tcpcheck_get_step_comment(struct check *check, int stepid)
2638{
2639 struct tcpcheck_rule *cur = NULL;
2640 char *ret = NULL;
2641 int i = 0;
2642
2643 /* not even started anything yet, return latest comment found before any action */
2644 if (!check->current_step) {
2645 list_for_each_entry(cur, check->tcpcheck_rules, list) {
2646 if (cur->action == TCPCHK_ACT_COMMENT)
2647 ret = cur->comment;
2648 else
2649 goto return_comment;
2650 }
2651 }
2652
2653 i = 1;
2654 list_for_each_entry(cur, check->tcpcheck_rules, list) {
2655 if (cur->comment)
2656 ret = cur->comment;
2657
2658 if (i >= stepid)
2659 goto return_comment;
2660
2661 ++i;
2662 }
2663
2664 return_comment:
2665 return ret;
2666}
2667
Willy Tarreaube74b882017-10-04 16:22:49 +02002668/* proceed with next steps for the TCP checks <check>. Note that this is called
2669 * both from the connection's wake() callback and from the check scheduling task.
Willy Tarreau6bdcab02017-10-04 18:41:00 +02002670 * It returns 0 on normal cases, or <0 if a close() has happened on an existing
2671 * connection, presenting the risk of an fd replacement.
Willy Tarreau62ac84f2017-11-05 10:11:13 +01002672 *
2673 * Please do NOT place any return statement in this function and only leave
2674 * via the out_unlock label after setting retcode.
Willy Tarreaube74b882017-10-04 16:22:49 +02002675 */
Willy Tarreau6bdcab02017-10-04 18:41:00 +02002676static int tcpcheck_main(struct check *check)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002677{
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002678 char *contentptr, *comment;
Willy Tarreauce8c42a2015-05-13 11:23:01 +02002679 struct tcpcheck_rule *next;
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02002680 int done = 0, ret = 0, step = 0;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002681 struct conn_stream *cs = check->cs;
2682 struct connection *conn = cs_conn(cs);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002683 struct server *s = check->server;
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002684 struct proxy *proxy = check->proxy;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002685 struct task *t = check->task;
Simon Hormane16c1b32015-01-30 11:22:57 +09002686 struct list *head = check->tcpcheck_rules;
Willy Tarreau6bdcab02017-10-04 18:41:00 +02002687 int retcode = 0;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002688
Willy Tarreauef953952014-10-02 14:30:14 +02002689 /* here, we know that the check is complete or that it failed */
2690 if (check->result != CHK_RES_UNKNOWN)
2691 goto out_end_tcpcheck;
2692
2693 /* We have 4 possibilities here :
2694 * 1. we've not yet attempted step 1, and step 1 is a connect, so no
Willy Tarreau00149122017-10-04 18:05:01 +02002695 * connection attempt was made yet ; conn==NULL;current_step==NULL.
Willy Tarreauef953952014-10-02 14:30:14 +02002696 * 2. we've not yet attempted step 1, and step 1 is a not connect or
2697 * does not exist (no rule), so a connection attempt was made
Willy Tarreau00149122017-10-04 18:05:01 +02002698 * before coming here, conn!=NULL.
Willy Tarreauef953952014-10-02 14:30:14 +02002699 * 3. we're coming back after having started with step 1, so we may
Willy Tarreau00149122017-10-04 18:05:01 +02002700 * be waiting for a connection attempt to complete. conn!=NULL.
2701 * 4. the connection + handshake are complete. conn!=NULL.
Willy Tarreauef953952014-10-02 14:30:14 +02002702 *
2703 * #2 and #3 are quite similar, we want both the connection and the
2704 * handshake to complete before going any further. Thus we must always
2705 * wait for a connection to complete unless we're before and existing
2706 * step 1.
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002707 */
Willy Tarreau449f9522015-05-13 15:39:48 +02002708
2709 /* find first rule and skip comments */
2710 next = LIST_NEXT(head, struct tcpcheck_rule *, list);
2711 while (&next->list != head && next->action == TCPCHK_ACT_COMMENT)
2712 next = LIST_NEXT(&next->list, struct tcpcheck_rule *, list);
2713
Willy Tarreau00149122017-10-04 18:05:01 +02002714 if ((check->current_step || &next->list == head) &&
2715 (!(conn->flags & CO_FL_CONNECTED) || (conn->flags & CO_FL_HANDSHAKE))) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002716 /* we allow up to min(inter, timeout.connect) for a connection
2717 * to establish but only when timeout.check is set
2718 * as it may be to short for a full check otherwise
2719 */
2720 while (tick_is_expired(t->expire, now_ms)) {
2721 int t_con;
2722
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002723 t_con = tick_add(t->expire, proxy->timeout.connect);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002724 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
2725
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002726 if (proxy->timeout.check)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002727 t->expire = tick_first(t->expire, t_con);
2728 }
Christopher Fauletb6102852017-11-28 10:06:29 +01002729 goto out;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002730 }
2731
Willy Tarreauef953952014-10-02 14:30:14 +02002732 /* special case: option tcp-check with no rule, a connect is enough */
Willy Tarreau449f9522015-05-13 15:39:48 +02002733 if (&next->list == head) {
Willy Tarreauef953952014-10-02 14:30:14 +02002734 set_server_check_status(check, HCHK_STATUS_L4OK, NULL);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002735 goto out_end_tcpcheck;
Willy Tarreauef953952014-10-02 14:30:14 +02002736 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002737
Willy Tarreau213c6782014-10-02 14:51:02 +02002738 /* no step means first step initialisation */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002739 if (check->current_step == NULL) {
Willy Tarreau213c6782014-10-02 14:51:02 +02002740 check->last_started_step = NULL;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002741 b_reset(&check->bo);
2742 b_reset(&check->bi);
Willy Tarreau449f9522015-05-13 15:39:48 +02002743 check->current_step = next;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002744 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002745 if (proxy->timeout.check)
2746 t->expire = tick_add_ifset(now_ms, proxy->timeout.check);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002747 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002748
Willy Tarreauabca5b62013-12-06 14:19:25 +01002749 while (1) {
Willy Tarreau263013d2015-05-13 11:59:14 +02002750 /* We have to try to flush the output buffer before reading, at
2751 * the end, or if we're about to send a string that does not fit
2752 * in the remaining space. That explains why we break out of the
Willy Tarreau00149122017-10-04 18:05:01 +02002753 * loop after this control. If we have data, conn is valid.
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002754 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002755 if (b_data(&check->bo) &&
Willy Tarreauce8c42a2015-05-13 11:23:01 +02002756 (&check->current_step->list == head ||
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002757 check->current_step->action != TCPCHK_ACT_SEND ||
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002758 check->current_step->string_len >= b_room(&check->bo))) {
Willy Tarreaudeccd112018-06-14 18:38:55 +02002759 int ret;
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002760
Olivier Houcharded0f2072018-08-16 15:41:52 +02002761 ret = cs->conn->mux->snd_buf(cs, &check->bo, b_data(&check->bo), 0);
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002762 b_realign_if_empty(&check->bo);
Willy Tarreaudeccd112018-06-14 18:38:55 +02002763
2764 if (ret <= 0) {
Willy Tarreau4ff3b892017-10-16 15:17:17 +02002765 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) {
Willy Tarreaub5259bf2017-10-04 14:47:29 +02002766 chk_report_conn_err(check, errno, 0);
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002767 goto out_end_tcpcheck;
2768 }
Willy Tarreau263013d2015-05-13 11:59:14 +02002769 break;
Willy Tarreauabca5b62013-12-06 14:19:25 +01002770 }
Olivier Houchard4501c3e2018-08-28 19:36:18 +02002771 if (b_data(&check->bo)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01002772 cs->conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
Olivier Houchard4501c3e2018-08-28 19:36:18 +02002773 goto out;
2774 }
Willy Tarreauabca5b62013-12-06 14:19:25 +01002775 }
2776
Willy Tarreau263013d2015-05-13 11:59:14 +02002777 if (&check->current_step->list == head)
Willy Tarreauabca5b62013-12-06 14:19:25 +01002778 break;
2779
Willy Tarreauce8c42a2015-05-13 11:23:01 +02002780 /* have 'next' point to the next rule or NULL if we're on the
2781 * last one, connect() needs this.
2782 */
Willy Tarreau5581c272015-05-13 12:24:53 +02002783 next = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002784
2785 /* bypass all comment rules */
Willy Tarreauf2c87352015-05-13 12:08:21 +02002786 while (&next->list != head && next->action == TCPCHK_ACT_COMMENT)
Willy Tarreau5581c272015-05-13 12:24:53 +02002787 next = LIST_NEXT(&next->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002788
2789 /* NULL if we're on the last rule */
Willy Tarreauf3d34822014-12-08 12:11:28 +01002790 if (&next->list == head)
2791 next = NULL;
2792
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002793 if (check->current_step->action == TCPCHK_ACT_CONNECT) {
2794 struct protocol *proto;
2795 struct xprt_ops *xprt;
2796
Willy Tarreau00149122017-10-04 18:05:01 +02002797 /* For a connect action we'll create a new connection.
2798 * We may also have to kill a previous one. But we don't
2799 * want to leave *without* a connection if we came here
2800 * from the connection layer, hence with a connection.
2801 * Thus we'll proceed in the following order :
2802 * 1: close but not release previous connection
2803 * 2: try to get a new connection
2804 * 3: release and replace the old one on success
2805 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002806 if (check->cs) {
Willy Tarreaua553ae92017-10-05 18:52:17 +02002807 cs_close(check->cs);
2808 retcode = -1; /* do not reuse the fd in the caller! */
Willy Tarreau00149122017-10-04 18:05:01 +02002809 }
2810
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002811 /* mark the step as started */
2812 check->last_started_step = check->current_step;
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002813
2814 /* prepare new connection */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002815 cs = cs_new(NULL);
2816 if (!cs) {
Willy Tarreau00149122017-10-04 18:05:01 +02002817 step = tcpcheck_get_step_id(check);
2818 chunk_printf(&trash, "TCPCHK error allocating connection at step %d", step);
2819 comment = tcpcheck_get_step_comment(check, step);
2820 if (comment)
2821 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002822 set_server_check_status(check, HCHK_STATUS_SOCKERR,
2823 trash.area);
Willy Tarreau00149122017-10-04 18:05:01 +02002824 check->current_step = NULL;
Christopher Fauletb6102852017-11-28 10:06:29 +01002825 goto out;
Willy Tarreau00149122017-10-04 18:05:01 +02002826 }
2827
Olivier Houchard49065542019-05-31 19:20:36 +02002828 if (check->cs) {
2829 if (check->wait_list.events)
2830 cs->conn->xprt->unsubscribe(cs->conn,
2831 cs->conn->xprt_ctx,
2832 check->wait_list.events,
2833 &check->wait_list);
Willy Tarreau86eded62019-06-14 14:47:49 +02002834 /* We may have been scheduled to run, and the
2835 * I/O handler expects to have a cs, so remove
2836 * the tasklet
2837 */
2838 tasklet_remove_from_tasklet_list(check->wait_list.tasklet);
Willy Tarreauac59f362017-10-08 11:10:19 +02002839 cs_destroy(check->cs);
Olivier Houchard49065542019-05-31 19:20:36 +02002840 }
Willy Tarreau00149122017-10-04 18:05:01 +02002841
Olivier Houchard9aaf7782017-09-13 18:30:23 +02002842 check->cs = cs;
2843 conn = cs->conn;
Olivier Houchard26e1a8f2018-09-12 15:15:12 +02002844 /* Maybe there were an older connection we were waiting on */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01002845 check->wait_list.events = 0;
Olivier Houchard0923fa42019-01-11 18:43:04 +01002846 conn->target = s ? &s->obj_type : &proxy->obj_type;
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002847
2848 /* no client address */
2849 clear_addr(&conn->addr.from);
2850
Simon Horman41f58762015-01-30 11:22:56 +09002851 if (is_addr(&check->addr)) {
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002852 /* we'll connect to the check addr specified on the server */
Simon Horman41f58762015-01-30 11:22:56 +09002853 conn->addr.to = check->addr;
Willy Tarreau640556c2014-05-09 23:38:15 +02002854 }
2855 else {
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002856 /* we'll connect to the addr on the server */
2857 conn->addr.to = s->addr;
Willy Tarreau640556c2014-05-09 23:38:15 +02002858 }
Thierry FOURNIERbb2ae642015-01-14 11:31:49 +01002859 proto = protocol_by_family(conn->addr.to.ss_family);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002860
2861 /* port */
2862 if (check->current_step->port)
2863 set_host_port(&conn->addr.to, check->current_step->port);
2864 else if (check->port)
2865 set_host_port(&conn->addr.to, check->port);
Baptiste Assmann2f3a56b2018-03-19 12:22:41 +01002866 else if (s->svc_port)
2867 set_host_port(&conn->addr.to, s->svc_port);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002868
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002869 if (check->current_step->conn_opts & TCPCHK_OPT_SSL) {
Willy Tarreaua261e9b2016-12-22 20:44:00 +01002870 xprt = xprt_get(XPRT_SSL);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002871 }
2872 else {
Willy Tarreaua261e9b2016-12-22 20:44:00 +01002873 xprt = xprt_get(XPRT_RAW);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002874 }
Willy Tarreaube373152018-09-06 11:45:30 +02002875
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002876 conn_prepare(conn, proto, xprt);
Olivier Houchardf67be932019-01-29 15:47:43 +01002877 if (conn_install_mux(conn, &mux_pt_ops, cs, proxy, NULL) < 0)
2878 return SF_ERR_RESOURCE;
Willy Tarreaube373152018-09-06 11:45:30 +02002879 cs_attach(cs, check, &check_conn_cb);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002880
Willy Tarreaue7dff022015-04-03 01:14:29 +02002881 ret = SF_ERR_INTERNAL;
Ricardo Nabinger Sanchez4bccea92019-03-28 21:42:23 -03002882 if (proto && proto->connect)
Willy Tarreauf3d34822014-12-08 12:11:28 +01002883 ret = proto->connect(conn,
Olivier Houchardfdcb0072019-05-06 18:32:29 +02002884 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 +01002885 if (check->current_step->conn_opts & TCPCHK_OPT_SEND_PROXY) {
2886 conn->send_proxy_ofs = 1;
2887 conn->flags |= CO_FL_SEND_PROXY;
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02002888 if (xprt_add_hs(conn) < 0)
2889 ret = SF_ERR_RESOURCE;
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002890 }
2891
2892 /* It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02002893 * - SF_ERR_NONE if everything's OK
2894 * - SF_ERR_SRVTO if there are no more servers
2895 * - SF_ERR_SRVCL if the connection was refused by the server
2896 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
2897 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
2898 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +01002899 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002900 * Note that we try to prevent the network stack from sending the ACK during the
2901 * connect() when a pure TCP check is used (without PROXY protocol).
2902 */
2903 switch (ret) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02002904 case SF_ERR_NONE:
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002905 /* we allow up to min(inter, timeout.connect) for a connection
2906 * to establish but only when timeout.check is set
2907 * as it may be to short for a full check otherwise
2908 */
2909 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
2910
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002911 if (proxy->timeout.check && proxy->timeout.connect) {
2912 int t_con = tick_add(now_ms, proxy->timeout.connect);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002913 t->expire = tick_first(t->expire, t_con);
2914 }
2915 break;
Willy Tarreaue7dff022015-04-03 01:14:29 +02002916 case SF_ERR_SRVTO: /* ETIMEDOUT */
2917 case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02002918 step = tcpcheck_get_step_id(check);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002919 chunk_printf(&trash, "TCPCHK error establishing connection at step %d: %s",
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02002920 step, strerror(errno));
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002921 comment = tcpcheck_get_step_comment(check, step);
2922 if (comment)
2923 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002924 set_server_check_status(check, HCHK_STATUS_L4CON,
2925 trash.area);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002926 goto out_end_tcpcheck;
Willy Tarreaue7dff022015-04-03 01:14:29 +02002927 case SF_ERR_PRXCOND:
2928 case SF_ERR_RESOURCE:
2929 case SF_ERR_INTERNAL:
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02002930 step = tcpcheck_get_step_id(check);
2931 chunk_printf(&trash, "TCPCHK error establishing connection at step %d", step);
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_SOCKERR,
2936 trash.area);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002937 goto out_end_tcpcheck;
2938 }
2939
2940 /* allow next rule */
Willy Tarreau5581c272015-05-13 12:24:53 +02002941 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002942
2943 /* bypass all comment rules */
Willy Tarreauf2c87352015-05-13 12:08:21 +02002944 while (&check->current_step->list != head &&
2945 check->current_step->action == TCPCHK_ACT_COMMENT)
Willy Tarreau5581c272015-05-13 12:24:53 +02002946 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002947
Willy Tarreauf2c87352015-05-13 12:08:21 +02002948 if (&check->current_step->list == head)
2949 break;
2950
Baptiste Assmann69e273f2013-12-11 00:52:19 +01002951 } /* end 'connect' */
2952 else if (check->current_step->action == TCPCHK_ACT_SEND) {
2953 /* mark the step as started */
2954 check->last_started_step = check->current_step;
2955
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002956 /* reset the read buffer */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002957 if (*b_head(&check->bi) != '\0') {
2958 *b_head(&check->bi) = '\0';
2959 b_reset(&check->bi);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002960 }
2961
Willy Tarreaubbae3f02017-08-30 09:59:52 +02002962 if (conn->flags & CO_FL_SOCK_WR_SH) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002963 conn->flags |= CO_FL_ERROR;
Willy Tarreaub5259bf2017-10-04 14:47:29 +02002964 chk_report_conn_err(check, 0, 0);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002965 goto out_end_tcpcheck;
2966 }
2967
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002968 if (check->current_step->string_len >= b_size(&check->bo)) {
Willy Tarreau506a29a2018-07-18 10:07:58 +02002969 chunk_printf(&trash, "tcp-check send : string too large (%d) for buffer size (%u) at step %d",
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002970 check->current_step->string_len, (unsigned int)b_size(&check->bo),
Simon Hormane16c1b32015-01-30 11:22:57 +09002971 tcpcheck_get_step_id(check));
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002972 set_server_check_status(check, HCHK_STATUS_L7RSP,
2973 trash.area);
Willy Tarreauabca5b62013-12-06 14:19:25 +01002974 goto out_end_tcpcheck;
2975 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002976
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002977 /* do not try to send if there is no space */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002978 if (check->current_step->string_len >= b_room(&check->bo))
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002979 continue;
2980
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002981 b_putblk(&check->bo, check->current_step->string, check->current_step->string_len);
2982 *b_tail(&check->bo) = '\0'; /* to make gdb output easier to read */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002983
Willy Tarreauabca5b62013-12-06 14:19:25 +01002984 /* go to next rule and try to send */
Willy Tarreau5581c272015-05-13 12:24:53 +02002985 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02002986
2987 /* bypass all comment rules */
Willy Tarreauf2c87352015-05-13 12:08:21 +02002988 while (&check->current_step->list != head &&
2989 check->current_step->action == TCPCHK_ACT_COMMENT)
Willy Tarreau5581c272015-05-13 12:24:53 +02002990 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Willy Tarreauf2c87352015-05-13 12:08:21 +02002991
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002992 } /* end 'send' */
Willy Tarreau98aec9f2013-12-06 16:16:41 +01002993 else if (check->current_step->action == TCPCHK_ACT_EXPECT) {
Willy Tarreau6aaa1b82013-12-11 17:09:34 +01002994 if (unlikely(check->result == CHK_RES_FAILED))
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02002995 goto out_end_tcpcheck;
2996
Olivier Houchard511efea2018-08-16 15:30:32 +02002997 if (cs->conn->mux->rcv_buf(cs, &check->bi, b_size(&check->bi), 0) <= 0) {
Willy Tarreau4ff3b892017-10-16 15:17:17 +02002998 if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) {
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01002999 done = 1;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003000 if ((conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) && !b_data(&check->bi)) {
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01003001 /* Report network errors only if we got no other data. Otherwise
3002 * we'll let the upper layers decide whether the response is OK
3003 * or not. It is very common that an RST sent by the server is
3004 * reported as an error just after the last data chunk.
3005 */
Willy Tarreaub5259bf2017-10-04 14:47:29 +02003006 chk_report_conn_err(check, errno, 0);
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01003007 goto out_end_tcpcheck;
3008 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003009 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003010 else {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003011 conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
Willy Tarreau263013d2015-05-13 11:59:14 +02003012 break;
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003013 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003014 }
3015
Baptiste Assmann69e273f2013-12-11 00:52:19 +01003016 /* mark the step as started */
3017 check->last_started_step = check->current_step;
3018
3019
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003020 /* Intermediate or complete response received.
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003021 * Terminate string in b_head(&check->bi) buffer.
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003022 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003023 if (b_data(&check->bi) < b_size(&check->bi)) {
3024 b_head(&check->bi)[b_data(&check->bi)] = '\0';
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003025 }
3026 else {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003027 b_head(&check->bi)[b_data(&check->bi) - 1] = '\0';
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003028 done = 1; /* buffer full, don't wait for more data */
3029 }
3030
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003031 contentptr = b_head(&check->bi);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003032
3033 /* Check that response body is not empty... */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003034 if (!b_data(&check->bi)) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003035 if (!done)
Willy Tarreaufbe0edf2013-12-06 16:54:31 +01003036 continue;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003037
3038 /* empty response */
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02003039 step = tcpcheck_get_step_id(check);
3040 chunk_printf(&trash, "TCPCHK got an empty response at step %d", step);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003041 comment = tcpcheck_get_step_comment(check, step);
3042 if (comment)
3043 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003044 set_server_check_status(check, HCHK_STATUS_L7RSP,
3045 trash.area);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003046
3047 goto out_end_tcpcheck;
3048 }
3049
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003050 if (!done && (check->current_step->string != NULL) && (b_data(&check->bi) < check->current_step->string_len) )
Willy Tarreaua970c282013-12-06 12:47:19 +01003051 continue; /* try to read more */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003052
Willy Tarreaua970c282013-12-06 12:47:19 +01003053 tcpcheck_expect:
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003054 if (check->current_step->string != NULL)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003055 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 +02003056 else if (check->current_step->expect_regex != NULL)
3057 ret = regex_exec(check->current_step->expect_regex, contentptr);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003058
3059 if (!ret && !done)
Willy Tarreaua970c282013-12-06 12:47:19 +01003060 continue; /* try to read more */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003061
3062 /* matched */
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02003063 step = tcpcheck_get_step_id(check);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003064 if (ret) {
3065 /* matched but we did not want to => ERROR */
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003066 if (check->current_step->inverse) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003067 /* we were looking for a string */
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003068 if (check->current_step->string != NULL) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003069 chunk_printf(&trash, "TCPCHK matched unwanted content '%s' at step %d",
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003070 check->current_step->string, step);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003071 }
3072 else {
3073 /* we were looking for a regex */
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02003074 chunk_printf(&trash, "TCPCHK matched unwanted content (regex) at step %d", step);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003075 }
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003076 comment = tcpcheck_get_step_comment(check, step);
3077 if (comment)
3078 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003079 set_server_check_status(check, HCHK_STATUS_L7RSP,
3080 trash.area);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003081 goto out_end_tcpcheck;
3082 }
3083 /* matched and was supposed to => OK, next step */
3084 else {
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003085 /* allow next rule */
Willy Tarreau5581c272015-05-13 12:24:53 +02003086 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003087
3088 /* bypass all comment rules */
Willy Tarreauf2c87352015-05-13 12:08:21 +02003089 while (&check->current_step->list != head &&
3090 check->current_step->action == TCPCHK_ACT_COMMENT)
Willy Tarreau5581c272015-05-13 12:24:53 +02003091 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003092
Willy Tarreauf2c87352015-05-13 12:08:21 +02003093 if (&check->current_step->list == head)
3094 break;
3095
Willy Tarreau98aec9f2013-12-06 16:16:41 +01003096 if (check->current_step->action == TCPCHK_ACT_EXPECT)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003097 goto tcpcheck_expect;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003098 }
3099 }
3100 else {
3101 /* not matched */
3102 /* not matched and was not supposed to => OK, next step */
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003103 if (check->current_step->inverse) {
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003104 /* allow next rule */
Willy Tarreau5581c272015-05-13 12:24:53 +02003105 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003106
3107 /* bypass all comment rules */
Willy Tarreauf2c87352015-05-13 12:08:21 +02003108 while (&check->current_step->list != head &&
3109 check->current_step->action == TCPCHK_ACT_COMMENT)
Willy Tarreau5581c272015-05-13 12:24:53 +02003110 check->current_step = LIST_NEXT(&check->current_step->list, struct tcpcheck_rule *, list);
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003111
Willy Tarreauf2c87352015-05-13 12:08:21 +02003112 if (&check->current_step->list == head)
3113 break;
3114
Willy Tarreau98aec9f2013-12-06 16:16:41 +01003115 if (check->current_step->action == TCPCHK_ACT_EXPECT)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003116 goto tcpcheck_expect;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003117 }
3118 /* not matched but was supposed to => ERROR */
3119 else {
3120 /* we were looking for a string */
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003121 if (check->current_step->string != NULL) {
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003122 chunk_printf(&trash, "TCPCHK did not match content '%s' at step %d",
Willy Tarreauce8c42a2015-05-13 11:23:01 +02003123 check->current_step->string, step);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003124 }
3125 else {
3126 /* we were looking for a regex */
3127 chunk_printf(&trash, "TCPCHK did not match content (regex) at step %d",
Baptiste Assmanncfbd1b82015-05-02 09:00:23 +02003128 step);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003129 }
Baptiste Assmann22b09d22015-05-01 08:03:04 +02003130 comment = tcpcheck_get_step_comment(check, step);
3131 if (comment)
3132 chunk_appendf(&trash, " comment: '%s'", comment);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003133 set_server_check_status(check, HCHK_STATUS_L7RSP,
3134 trash.area);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003135 goto out_end_tcpcheck;
3136 }
3137 }
3138 } /* end expect */
3139 } /* end loop over double chained step list */
3140
Baptiste Assmann248f1172018-03-01 21:49:01 +01003141 /* don't do anything until the connection is established */
3142 if (!(conn->flags & CO_FL_CONNECTED)) {
3143 /* update expire time, should be done by process_chk */
3144 /* we allow up to min(inter, timeout.connect) for a connection
3145 * to establish but only when timeout.check is set
3146 * as it may be to short for a full check otherwise
3147 */
3148 while (tick_is_expired(t->expire, now_ms)) {
3149 int t_con;
3150
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01003151 t_con = tick_add(t->expire, proxy->timeout.connect);
Baptiste Assmann248f1172018-03-01 21:49:01 +01003152 t->expire = tick_add(t->expire, MS_TO_TICKS(check->inter));
3153
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01003154 if (proxy->timeout.check)
Baptiste Assmann248f1172018-03-01 21:49:01 +01003155 t->expire = tick_first(t->expire, t_con);
3156 }
3157 goto out;
3158 }
3159
Willy Tarreau263013d2015-05-13 11:59:14 +02003160 /* We're waiting for some I/O to complete, we've reached the end of the
3161 * rules, or both. Do what we have to do, otherwise we're done.
3162 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003163 if (&check->current_step->list == head && !b_data(&check->bo)) {
Willy Tarreau263013d2015-05-13 11:59:14 +02003164 set_server_check_status(check, HCHK_STATUS_L7OKD, "(tcp-check)");
3165 goto out_end_tcpcheck;
3166 }
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003167
Willy Tarreau53c5a042015-05-13 11:38:17 +02003168 if (&check->current_step->list != head &&
Olivier Houchard53216e72018-10-10 15:46:36 +02003169 check->current_step->action == TCPCHK_ACT_EXPECT)
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003170 __event_srv_chk_r(cs);
Christopher Fauletb6102852017-11-28 10:06:29 +01003171 goto out;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003172
3173 out_end_tcpcheck:
3174 /* collect possible new errors */
Willy Tarreau4ff3b892017-10-16 15:17:17 +02003175 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreaub5259bf2017-10-04 14:47:29 +02003176 chk_report_conn_err(check, 0, 0);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003177
Baptiste Assmann69e273f2013-12-11 00:52:19 +01003178 /* cleanup before leaving */
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003179 check->current_step = NULL;
3180
Willy Tarreau6aaa1b82013-12-11 17:09:34 +01003181 if (check->result == CHK_RES_FAILED)
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003182 conn->flags |= CO_FL_ERROR;
3183
Christopher Fauletb6102852017-11-28 10:06:29 +01003184 out:
Willy Tarreau6bdcab02017-10-04 18:41:00 +02003185 return retcode;
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003186}
3187
Simon Hormanb1900d52015-01-30 11:22:54 +09003188const char *init_check(struct check *check, int type)
3189{
3190 check->type = type;
3191
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003192 b_reset(&check->bi); check->bi.size = global.tune.chksize;
3193 b_reset(&check->bo); check->bo.size = global.tune.chksize;
Simon Hormanb1900d52015-01-30 11:22:54 +09003194
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003195 check->bi.area = calloc(check->bi.size, sizeof(char));
3196 check->bo.area = calloc(check->bo.size, sizeof(char));
3197
3198 if (!check->bi.area || !check->bo.area)
Simon Hormanb1900d52015-01-30 11:22:54 +09003199 return "out of memory while allocating check buffer";
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003200
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003201 check->wait_list.tasklet = tasklet_new();
3202 if (!check->wait_list.tasklet)
Olivier Houchard26e1a8f2018-09-12 15:15:12 +02003203 return "out of memroy while allocating check tasklet";
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003204 check->wait_list.events = 0;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003205 check->wait_list.tasklet->process = event_srv_chk_io;
3206 check->wait_list.tasklet->context = check;
Simon Hormanb1900d52015-01-30 11:22:54 +09003207 return NULL;
3208}
3209
Simon Hormanbfb5d332015-01-30 11:22:55 +09003210void free_check(struct check *check)
3211{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003212 free(check->bi.area);
3213 free(check->bo.area);
Christopher Faulet23d86d12018-01-25 11:36:35 +01003214 if (check->cs) {
3215 free(check->cs->conn);
3216 check->cs->conn = NULL;
3217 cs_free(check->cs);
3218 check->cs = NULL;
3219 }
Simon Hormanbfb5d332015-01-30 11:22:55 +09003220}
3221
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003222void email_alert_free(struct email_alert *alert)
3223{
3224 struct tcpcheck_rule *rule, *back;
3225
3226 if (!alert)
3227 return;
3228
Christopher Fauletde1a75b2017-10-23 15:38:19 +02003229 list_for_each_entry_safe(rule, back, &alert->tcpcheck_rules, list) {
3230 LIST_DEL(&rule->list);
3231 free(rule->comment);
3232 free(rule->string);
Dragan Dosen26743032019-04-30 15:54:36 +02003233 regex_free(rule->expect_regex);
Willy Tarreaubafbe012017-11-24 17:34:44 +01003234 pool_free(pool_head_tcpcheck_rule, rule);
Christopher Fauletde1a75b2017-10-23 15:38:19 +02003235 }
Willy Tarreaubafbe012017-11-24 17:34:44 +01003236 pool_free(pool_head_email_alert, alert);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003237}
3238
Olivier Houchard9f6af332018-05-25 14:04:04 +02003239static struct task *process_email_alert(struct task *t, void *context, unsigned short state)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003240{
Olivier Houchard9f6af332018-05-25 14:04:04 +02003241 struct check *check = context;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003242 struct email_alertq *q;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003243 struct email_alert *alert;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003244
3245 q = container_of(check, typeof(*q), check);
3246
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003247 HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003248 while (1) {
3249 if (!(check->state & CHK_ST_ENABLED)) {
3250 if (LIST_ISEMPTY(&q->email_alerts)) {
3251 /* All alerts processed, queue the task */
3252 t->expire = TICK_ETERNITY;
3253 task_queue(t);
Christopher Fauletc2a89a62017-10-23 15:54:24 +02003254 goto end;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003255 }
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003256
3257 alert = LIST_NEXT(&q->email_alerts, typeof(alert), list);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003258 LIST_DEL(&alert->list);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003259 t->expire = now_ms;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003260 check->tcpcheck_rules = &alert->tcpcheck_rules;
Olivier Houchard0923fa42019-01-11 18:43:04 +01003261 check->status = HCHK_STATUS_INI;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003262 check->state |= CHK_ST_ENABLED;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003263 }
3264
Olivier Houchard9f6af332018-05-25 14:04:04 +02003265 process_chk(t, context, state);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003266 if (check->state & CHK_ST_INPROGRESS)
3267 break;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003268
3269 alert = container_of(check->tcpcheck_rules, typeof(*alert), tcpcheck_rules);
3270 email_alert_free(alert);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003271 check->tcpcheck_rules = NULL;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003272 check->server = NULL;
3273 check->state &= ~CHK_ST_ENABLED;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003274 }
Christopher Fauletc2a89a62017-10-23 15:54:24 +02003275 end:
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003276 HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003277 return t;
3278}
3279
Christopher Faulet0108bb32017-10-20 21:34:32 +02003280/* Initializes mailer alerts for the proxy <p> using <mls> parameters.
3281 *
3282 * The function returns 1 in success case, otherwise, it returns 0 and err is
3283 * filled.
3284 */
3285int init_email_alert(struct mailers *mls, struct proxy *p, char **err)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003286{
Christopher Faulet0108bb32017-10-20 21:34:32 +02003287 struct mailer *mailer;
3288 struct email_alertq *queues;
3289 const char *err_str;
3290 int i = 0;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003291
Christopher Faulet0108bb32017-10-20 21:34:32 +02003292 if ((queues = calloc(mls->count, sizeof(*queues))) == NULL) {
3293 memprintf(err, "out of memory while allocating mailer alerts queues");
mildis5ab01cb2018-10-02 16:46:34 +02003294 goto fail_no_queue;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003295 }
3296
Christopher Faulet0108bb32017-10-20 21:34:32 +02003297 for (mailer = mls->mailer_list; mailer; i++, mailer = mailer->next) {
3298 struct email_alertq *q = &queues[i];
3299 struct check *check = &q->check;
3300 struct task *t;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003301
3302 LIST_INIT(&q->email_alerts);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003303 HA_SPIN_INIT(&q->lock);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003304 check->inter = mls->timeout.mail;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003305 check->rise = DEF_AGENT_RISETIME;
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01003306 check->proxy = p;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003307 check->fall = DEF_AGENT_FALLTIME;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003308 if ((err_str = init_check(check, PR_O2_TCPCHK_CHK))) {
3309 memprintf(err, "%s", err_str);
3310 goto error;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003311 }
3312
3313 check->xprt = mailer->xprt;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003314 check->addr = mailer->addr;
Christopher Fauletb797ae12018-03-27 15:35:35 +02003315 check->port = get_host_port(&mailer->addr);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003316
Emeric Brunc60def82017-09-27 14:59:38 +02003317 if ((t = task_new(MAX_THREADS_MASK)) == NULL) {
Christopher Faulet0108bb32017-10-20 21:34:32 +02003318 memprintf(err, "out of memory while allocating mailer alerts task");
3319 goto error;
3320 }
3321
3322 check->task = t;
3323 t->process = process_email_alert;
3324 t->context = check;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003325
Christopher Faulet0108bb32017-10-20 21:34:32 +02003326 /* check this in one ms */
3327 t->expire = TICK_ETERNITY;
3328 check->start = now;
3329 task_queue(t);
3330 }
3331
3332 mls->users++;
3333 free(p->email_alert.mailers.name);
3334 p->email_alert.mailers.m = mls;
3335 p->email_alert.queues = queues;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003336 return 0;
Christopher Faulet0108bb32017-10-20 21:34:32 +02003337
3338 error:
3339 for (i = 0; i < mls->count; i++) {
3340 struct email_alertq *q = &queues[i];
3341 struct check *check = &q->check;
3342
Willy Tarreauf6562792019-05-07 19:05:35 +02003343 task_destroy(check->task);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003344 free_check(check);
3345 }
3346 free(queues);
mildis5ab01cb2018-10-02 16:46:34 +02003347 fail_no_queue:
Christopher Faulet0108bb32017-10-20 21:34:32 +02003348 return 1;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003349}
3350
3351
3352static int add_tcpcheck_expect_str(struct list *list, const char *str)
3353{
3354 struct tcpcheck_rule *tcpcheck;
3355
Willy Tarreaubafbe012017-11-24 17:34:44 +01003356 if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003357 return 0;
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003358 memset(tcpcheck, 0, sizeof(*tcpcheck));
3359 tcpcheck->action = TCPCHK_ACT_EXPECT;
3360 tcpcheck->string = strdup(str);
3361 tcpcheck->expect_regex = NULL;
3362 tcpcheck->comment = NULL;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003363 if (!tcpcheck->string) {
Willy Tarreaubafbe012017-11-24 17:34:44 +01003364 pool_free(pool_head_tcpcheck_rule, tcpcheck);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003365 return 0;
3366 }
3367
3368 LIST_ADDQ(list, &tcpcheck->list);
3369 return 1;
3370}
3371
3372static int add_tcpcheck_send_strs(struct list *list, const char * const *strs)
3373{
3374 struct tcpcheck_rule *tcpcheck;
Willy Tarreau64345aa2016-08-10 19:29:09 +02003375 const char *in;
3376 char *dst;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003377 int i;
3378
Willy Tarreaubafbe012017-11-24 17:34:44 +01003379 if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003380 return 0;
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003381 memset(tcpcheck, 0, sizeof(*tcpcheck));
3382 tcpcheck->action = TCPCHK_ACT_SEND;
3383 tcpcheck->expect_regex = NULL;
3384 tcpcheck->comment = NULL;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003385 tcpcheck->string_len = 0;
3386 for (i = 0; strs[i]; i++)
3387 tcpcheck->string_len += strlen(strs[i]);
3388
3389 tcpcheck->string = malloc(tcpcheck->string_len + 1);
3390 if (!tcpcheck->string) {
Willy Tarreaubafbe012017-11-24 17:34:44 +01003391 pool_free(pool_head_tcpcheck_rule, tcpcheck);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003392 return 0;
3393 }
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003394
Willy Tarreau64345aa2016-08-10 19:29:09 +02003395 dst = tcpcheck->string;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003396 for (i = 0; strs[i]; i++)
Willy Tarreau64345aa2016-08-10 19:29:09 +02003397 for (in = strs[i]; (*dst = *in++); dst++);
3398 *dst = 0;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003399
3400 LIST_ADDQ(list, &tcpcheck->list);
3401 return 1;
3402}
3403
Christopher Faulet0108bb32017-10-20 21:34:32 +02003404static int enqueue_one_email_alert(struct proxy *p, struct server *s,
3405 struct email_alertq *q, const char *msg)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003406{
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003407 struct email_alert *alert;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003408 struct tcpcheck_rule *tcpcheck;
3409 struct check *check = &q->check;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003410
Willy Tarreaubafbe012017-11-24 17:34:44 +01003411 if ((alert = pool_alloc(pool_head_email_alert)) == NULL)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003412 goto error;
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003413 LIST_INIT(&alert->list);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003414 LIST_INIT(&alert->tcpcheck_rules);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003415 alert->srv = s;
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003416
Willy Tarreaubafbe012017-11-24 17:34:44 +01003417 if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003418 goto error;
Christopher Faulet31dff9b2017-10-23 15:45:20 +02003419 memset(tcpcheck, 0, sizeof(*tcpcheck));
3420 tcpcheck->action = TCPCHK_ACT_CONNECT;
3421 tcpcheck->comment = NULL;
3422 tcpcheck->string = NULL;
3423 tcpcheck->expect_regex = NULL;
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003424 LIST_ADDQ(&alert->tcpcheck_rules, &tcpcheck->list);
3425
3426 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "220 "))
3427 goto error;
3428
3429 {
3430 const char * const strs[4] = { "EHLO ", p->email_alert.myhostname, "\r\n" };
3431 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3432 goto error;
3433 }
3434
3435 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 "))
3436 goto error;
3437
3438 {
3439 const char * const strs[4] = { "MAIL FROM:<", p->email_alert.from, ">\r\n" };
3440 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3441 goto error;
3442 }
3443
3444 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 "))
3445 goto error;
3446
3447 {
3448 const char * const strs[4] = { "RCPT TO:<", p->email_alert.to, ">\r\n" };
3449 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3450 goto error;
3451 }
3452
3453 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 "))
3454 goto error;
3455
3456 {
3457 const char * const strs[2] = { "DATA\r\n" };
3458 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3459 goto error;
3460 }
3461
3462 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "354 "))
3463 goto error;
3464
3465 {
3466 struct tm tm;
3467 char datestr[48];
3468 const char * const strs[18] = {
Pieter Baauw5e0964e2016-02-13 16:27:35 +01003469 "From: ", p->email_alert.from, "\r\n",
3470 "To: ", p->email_alert.to, "\r\n",
3471 "Date: ", datestr, "\r\n",
3472 "Subject: [HAproxy Alert] ", msg, "\r\n",
3473 "\r\n",
3474 msg, "\r\n",
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003475 "\r\n",
Pieter Baauwed35c372015-07-22 19:51:54 +02003476 ".\r\n",
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003477 NULL
3478 };
3479
3480 get_localtime(date.tv_sec, &tm);
3481
3482 if (strftime(datestr, sizeof(datestr), "%a, %d %b %Y %T %z (%Z)", &tm) == 0) {
3483 goto error;
3484 }
3485
3486 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3487 goto error;
3488 }
3489
3490 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "250 "))
3491 goto error;
3492
3493 {
3494 const char * const strs[2] = { "QUIT\r\n" };
3495 if (!add_tcpcheck_send_strs(&alert->tcpcheck_rules, strs))
3496 goto error;
3497 }
3498
3499 if (!add_tcpcheck_expect_str(&alert->tcpcheck_rules, "221 "))
3500 goto error;
3501
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003502 HA_SPIN_LOCK(EMAIL_ALERTS_LOCK, &q->lock);
Christopher Faulet0108bb32017-10-20 21:34:32 +02003503 task_wakeup(check->task, TASK_WOKEN_MSG);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003504 LIST_ADDQ(&q->email_alerts, &alert->list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003505 HA_SPIN_UNLOCK(EMAIL_ALERTS_LOCK, &q->lock);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003506 return 1;
3507
3508error:
3509 email_alert_free(alert);
3510 return 0;
3511}
3512
Christopher Faulet0108bb32017-10-20 21:34:32 +02003513static void enqueue_email_alert(struct proxy *p, struct server *s, const char *msg)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003514{
3515 int i;
3516 struct mailer *mailer;
3517
3518 for (i = 0, mailer = p->email_alert.mailers.m->mailer_list;
3519 i < p->email_alert.mailers.m->count; i++, mailer = mailer->next) {
Christopher Faulet0108bb32017-10-20 21:34:32 +02003520 if (!enqueue_one_email_alert(p, s, &p->email_alert.queues[i], msg)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01003521 ha_alert("Email alert [%s] could not be enqueued: out of memory\n", p->id);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003522 return;
3523 }
3524 }
3525
3526 return;
3527}
3528
3529/*
3530 * Send email alert if configured.
3531 */
Simon Horman64e34162015-02-06 11:11:57 +09003532void send_email_alert(struct server *s, int level, const char *format, ...)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003533{
3534 va_list argp;
3535 char buf[1024];
3536 int len;
3537 struct proxy *p = s->proxy;
3538
Christopher Faulet0108bb32017-10-20 21:34:32 +02003539 if (!p->email_alert.mailers.m || level > p->email_alert.level || format == NULL)
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003540 return;
3541
3542 va_start(argp, format);
3543 len = vsnprintf(buf, sizeof(buf), format, argp);
3544 va_end(argp);
3545
Thierry FOURNIER62c8a212017-02-09 12:19:27 +01003546 if (len < 0 || len >= sizeof(buf)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01003547 ha_alert("Email alert [%s] could not format message\n", p->id);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003548 return;
3549 }
3550
Christopher Faulet0108bb32017-10-20 21:34:32 +02003551 enqueue_email_alert(p, s, buf);
Simon Horman0ba0e4a2015-01-30 11:23:00 +09003552}
3553
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02003554/*
3555 * Return value:
3556 * the port to be used for the health check
3557 * 0 in case no port could be found for the check
3558 */
3559int srv_check_healthcheck_port(struct check *chk)
3560{
3561 int i = 0;
3562 struct server *srv = NULL;
3563
3564 srv = chk->server;
3565
3566 /* If neither a port nor an addr was specified and no check transport
3567 * layer is forced, then the transport layer used by the checks is the
3568 * same as for the production traffic. Otherwise we use raw_sock by
3569 * default, unless one is specified.
3570 */
3571 if (!chk->port && !is_addr(&chk->addr)) {
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02003572 chk->use_ssl |= (srv->use_ssl || (srv->proxy->options & PR_O_TCPCHK_SSL));
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02003573 chk->send_proxy |= (srv->pp_opts);
3574 }
3575
3576 /* by default, we use the health check port ocnfigured */
3577 if (chk->port > 0)
3578 return chk->port;
3579
3580 /* try to get the port from check_core.addr if check.port not set */
3581 i = get_host_port(&chk->addr);
3582 if (i > 0)
3583 return i;
3584
3585 /* try to get the port from server address */
3586 /* prevent MAPPORTS from working at this point, since checks could
3587 * not be performed in such case (MAPPORTS impose a relative ports
3588 * based on live traffic)
3589 */
3590 if (srv->flags & SRV_F_MAPPORTS)
3591 return 0;
Willy Tarreau04276f32017-01-06 17:41:29 +01003592
3593 i = srv->svc_port; /* by default */
Baptiste Assmann95db2bc2016-06-13 14:15:41 +02003594 if (i > 0)
3595 return i;
3596
3597 return 0;
3598}
3599
Willy Tarreau172f5ce2018-11-26 11:21:50 +01003600REGISTER_POST_CHECK(start_checks);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +02003601
Willy Tarreaubd741542010-03-16 18:46:54 +01003602/*
Willy Tarreaubaaee002006-06-26 02:48:02 +02003603 * Local variables:
3604 * c-indent-level: 8
3605 * c-basic-offset: 8
3606 * End:
3607 */