blob: eca38ad0b66a505e9f338293b7fd3ab6f3550de9 [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
2 * Server management functions.
3 *
Willy Tarreau21faa912012-10-10 08:27:36 +02004 * Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +01005 * Copyright 2007-2008 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 Tarreau0a4b0ab2020-06-11 11:22:44 +020014#include <sys/types.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020015#include <netinet/tcp.h>
Willy Tarreau272adea2014-03-31 10:39:59 +020016#include <ctype.h>
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +020017#include <errno.h>
Willy Tarreau272adea2014-03-31 10:39:59 +020018
Willy Tarreaub2551052020-06-09 09:07:15 +020019#include <import/ebsttree.h>
Willy Tarreau6be78492020-06-05 00:00:29 +020020#include <import/xxhash.h>
21
Willy Tarreaub2551052020-06-09 09:07:15 +020022#include <haproxy/api.h>
Willy Tarreau3f0f82e2020-06-04 19:42:41 +020023#include <haproxy/applet-t.h>
Willy Tarreau49801602020-06-04 22:50:02 +020024#include <haproxy/backend.h>
Willy Tarreau6be78492020-06-05 00:00:29 +020025#include <haproxy/cfgparse.h>
Willy Tarreau4aa573d2020-06-04 18:21:56 +020026#include <haproxy/check.h>
Willy Tarreau83487a82020-06-04 20:19:54 +020027#include <haproxy/cli.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020028#include <haproxy/connection.h>
Willy Tarreau3afc4c42020-06-03 18:23:19 +020029#include <haproxy/dict-t.h>
Willy Tarreaueb92deb2020-06-04 10:53:16 +020030#include <haproxy/dns.h>
Willy Tarreau8d366972020-05-27 16:10:29 +020031#include <haproxy/errors.h>
Willy Tarreauf268ee82020-06-04 17:05:57 +020032#include <haproxy/global.h>
Willy Tarreau36979d92020-06-05 17:27:29 +020033#include <haproxy/log.h>
Willy Tarreaucee013e2020-06-05 11:40:38 +020034#include <haproxy/mailers.h>
Willy Tarreau7a00efb2020-06-02 17:02:59 +020035#include <haproxy/namespace.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020036#include <haproxy/port_range.h>
37#include <haproxy/protocol.h>
Willy Tarreaua55c4542020-06-04 22:59:39 +020038#include <haproxy/queue.h>
Willy Tarreaue6ce10b2020-06-04 15:33:47 +020039#include <haproxy/sample.h>
Willy Tarreau1e56f922020-06-04 23:20:13 +020040#include <haproxy/server.h>
Willy Tarreau2eec9b52020-06-04 19:58:55 +020041#include <haproxy/stats-t.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020042#include <haproxy/stream.h>
Willy Tarreau5e539c92020-06-04 20:45:39 +020043#include <haproxy/stream_interface.h>
Willy Tarreaucea0e1b2020-06-04 17:25:40 +020044#include <haproxy/task.h>
Willy Tarreau51cd5952020-06-05 12:25:38 +020045#include <haproxy/tcpcheck.h>
Willy Tarreau92b4f132020-06-01 11:05:15 +020046#include <haproxy/time.h>
Krzysztof Oledzki85130942007-10-22 16:21:10 +020047
Baptiste Assmannda29fe22019-06-13 13:24:29 +020048
Willy Tarreau3ff577e2018-08-02 11:48:52 +020049static void srv_update_status(struct server *s);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +020050static void srv_update_state(struct server *srv, int version, char **params);
Baptiste Assmann83cbaa52016-11-02 15:34:05 +010051static int srv_apply_lastaddr(struct server *srv, int *err_code);
Olivier Houchardd16bfe62017-10-31 15:21:19 +010052static int srv_set_fqdn(struct server *srv, const char *fqdn, int dns_locked);
Baptiste Assmannda29fe22019-06-13 13:24:29 +020053static void srv_state_parse_line(char *buf, const int version, char **params, char **srv_params);
54static int srv_state_get_version(FILE *f);
William Dauchy6318d332020-05-02 21:52:36 +020055static void srv_cleanup_connections(struct server *srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +020056
Willy Tarreau21faa912012-10-10 08:27:36 +020057/* List head of all known server keywords */
58static struct srv_kw_list srv_keywords = {
59 .list = LIST_HEAD_INIT(srv_keywords.list)
60};
Krzysztof Oledzki85130942007-10-22 16:21:10 +020061
Willy Tarreauaf613e82020-06-05 08:40:51 +020062__decl_thread(HA_SPINLOCK_T idle_conn_srv_lock);
Olivier Houchard9ea5d362019-02-14 18:29:09 +010063struct eb_root idle_conn_srv = EB_ROOT;
64struct task *idle_conn_task = NULL;
Olivier Houchard9ea5d362019-02-14 18:29:09 +010065
Frédéric Lécaille7da71292019-05-20 09:47:07 +020066/* The server names dictionary */
67struct dict server_name_dict = {
68 .name = "server names",
69 .values = EB_ROOT_UNIQUE,
70};
71
Baptiste Assmannda29fe22019-06-13 13:24:29 +020072/* tree where global state_file is loaded */
Willy Tarreaufd1aa012019-12-20 17:23:40 +010073struct eb_root state_file = EB_ROOT_UNIQUE;
Baptiste Assmannda29fe22019-06-13 13:24:29 +020074
Simon Hormana3608442013-11-01 16:46:15 +090075int srv_downtime(const struct server *s)
Willy Tarreau21faa912012-10-10 08:27:36 +020076{
Amaury Denoyellee6ba7912020-10-29 15:59:05 +010077 if ((s->cur_state != SRV_ST_STOPPED) || s->last_change >= now.tv_sec) // ignore negative time
Krzysztof Oledzki85130942007-10-22 16:21:10 +020078 return s->down_time;
79
80 return now.tv_sec - s->last_change + s->down_time;
81}
Willy Tarreaubaaee002006-06-26 02:48:02 +020082
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -050083int srv_lastsession(const struct server *s)
84{
85 if (s->counters.last_sess)
86 return now.tv_sec - s->counters.last_sess;
87
88 return -1;
89}
90
Simon Horman4a741432013-02-23 15:35:38 +090091int srv_getinter(const struct check *check)
Willy Tarreau21faa912012-10-10 08:27:36 +020092{
Simon Horman4a741432013-02-23 15:35:38 +090093 const struct server *s = check->server;
94
Willy Tarreauff5ae352013-12-11 20:36:34 +010095 if ((check->state & CHK_ST_CONFIGURED) && (check->health == check->rise + check->fall - 1))
Simon Horman4a741432013-02-23 15:35:38 +090096 return check->inter;
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +010097
Emeric Brun52a91d32017-08-31 14:41:55 +020098 if ((s->next_state == SRV_ST_STOPPED) && check->health == 0)
Simon Horman4a741432013-02-23 15:35:38 +090099 return (check->downinter)?(check->downinter):(check->inter);
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100100
Simon Horman4a741432013-02-23 15:35:38 +0900101 return (check->fastinter)?(check->fastinter):(check->inter);
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100102}
103
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100104/*
105 * Check that we did not get a hash collision.
Willy Tarreau595e7672020-10-20 17:30:08 +0200106 * Unlikely, but it can happen. The server's proxy must be at least
107 * read-locked.
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100108 */
109static inline void srv_check_for_dup_dyncookie(struct server *s)
Olivier Houchard4e694042017-03-14 20:01:29 +0100110{
111 struct proxy *p = s->proxy;
112 struct server *tmpserv;
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100113
114 for (tmpserv = p->srv; tmpserv != NULL;
115 tmpserv = tmpserv->next) {
116 if (tmpserv == s)
117 continue;
118 if (tmpserv->next_admin & SRV_ADMF_FMAINT)
119 continue;
120 if (tmpserv->cookie &&
121 strcmp(tmpserv->cookie, s->cookie) == 0) {
122 ha_warning("We generated two equal cookies for two different servers.\n"
123 "Please change the secret key for '%s'.\n",
124 s->proxy->id);
125 }
126 }
127
128}
129
Willy Tarreau46b7f532018-08-21 11:54:26 +0200130/*
Willy Tarreau595e7672020-10-20 17:30:08 +0200131 * Must be called with the server lock held, and will read-lock the proxy.
Willy Tarreau46b7f532018-08-21 11:54:26 +0200132 */
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100133void srv_set_dyncookie(struct server *s)
134{
135 struct proxy *p = s->proxy;
Olivier Houchard4e694042017-03-14 20:01:29 +0100136 char *tmpbuf;
137 unsigned long long hash_value;
Olivier Houchard2cb49eb2017-03-15 15:11:06 +0100138 size_t key_len;
Olivier Houchard4e694042017-03-14 20:01:29 +0100139 size_t buffer_len;
140 int addr_len;
141 int port;
142
Willy Tarreau595e7672020-10-20 17:30:08 +0200143 HA_RWLOCK_RDLOCK(PROXY_LOCK, &p->lock);
Willy Tarreau5e83d992019-07-30 11:59:34 +0200144
Olivier Houchard4e694042017-03-14 20:01:29 +0100145 if ((s->flags & SRV_F_COOKIESET) ||
146 !(s->proxy->ck_opts & PR_CK_DYNAMIC) ||
147 s->proxy->dyncookie_key == NULL)
Willy Tarreau5e83d992019-07-30 11:59:34 +0200148 goto out;
Olivier Houchard2cb49eb2017-03-15 15:11:06 +0100149 key_len = strlen(p->dyncookie_key);
Olivier Houchard4e694042017-03-14 20:01:29 +0100150
151 if (s->addr.ss_family != AF_INET &&
152 s->addr.ss_family != AF_INET6)
Willy Tarreau5e83d992019-07-30 11:59:34 +0200153 goto out;
Olivier Houchard4e694042017-03-14 20:01:29 +0100154 /*
155 * Buffer to calculate the cookie value.
156 * The buffer contains the secret key + the server IP address
157 * + the TCP port.
158 */
159 addr_len = (s->addr.ss_family == AF_INET) ? 4 : 16;
160 /*
161 * The TCP port should use only 2 bytes, but is stored in
162 * an unsigned int in struct server, so let's use 4, to be
163 * on the safe side.
164 */
165 buffer_len = key_len + addr_len + 4;
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200166 tmpbuf = trash.area;
Olivier Houchard4e694042017-03-14 20:01:29 +0100167 memcpy(tmpbuf, p->dyncookie_key, key_len);
168 memcpy(&(tmpbuf[key_len]),
169 s->addr.ss_family == AF_INET ?
170 (void *)&((struct sockaddr_in *)&s->addr)->sin_addr.s_addr :
171 (void *)&(((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr),
172 addr_len);
173 /*
174 * Make sure it's the same across all the load balancers,
175 * no matter their endianness.
176 */
177 port = htonl(s->svc_port);
178 memcpy(&tmpbuf[key_len + addr_len], &port, 4);
179 hash_value = XXH64(tmpbuf, buffer_len, 0);
180 memprintf(&s->cookie, "%016llx", hash_value);
181 if (!s->cookie)
Willy Tarreau5e83d992019-07-30 11:59:34 +0200182 goto out;
Olivier Houchard4e694042017-03-14 20:01:29 +0100183 s->cklen = 16;
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100184
185 /* Don't bother checking if the dyncookie is duplicated if
186 * the server is marked as "disabled", maybe it doesn't have
187 * its real IP yet, but just a place holder.
Olivier Houchard4e694042017-03-14 20:01:29 +0100188 */
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100189 if (!(s->next_admin & SRV_ADMF_FMAINT))
190 srv_check_for_dup_dyncookie(s);
Willy Tarreau5e83d992019-07-30 11:59:34 +0200191 out:
Willy Tarreau595e7672020-10-20 17:30:08 +0200192 HA_RWLOCK_RDUNLOCK(PROXY_LOCK, &p->lock);
Olivier Houchard4e694042017-03-14 20:01:29 +0100193}
194
Willy Tarreau21faa912012-10-10 08:27:36 +0200195/*
196 * Registers the server keyword list <kwl> as a list of valid keywords for next
197 * parsing sessions.
198 */
199void srv_register_keywords(struct srv_kw_list *kwl)
200{
201 LIST_ADDQ(&srv_keywords.list, &kwl->list);
202}
203
204/* Return a pointer to the server keyword <kw>, or NULL if not found. If the
205 * keyword is found with a NULL ->parse() function, then an attempt is made to
206 * find one with a valid ->parse() function. This way it is possible to declare
207 * platform-dependant, known keywords as NULL, then only declare them as valid
208 * if some options are met. Note that if the requested keyword contains an
209 * opening parenthesis, everything from this point is ignored.
210 */
211struct srv_kw *srv_find_kw(const char *kw)
212{
213 int index;
214 const char *kwend;
215 struct srv_kw_list *kwl;
216 struct srv_kw *ret = NULL;
217
218 kwend = strchr(kw, '(');
219 if (!kwend)
220 kwend = kw + strlen(kw);
221
222 list_for_each_entry(kwl, &srv_keywords.list, list) {
223 for (index = 0; kwl->kw[index].kw != NULL; index++) {
224 if ((strncmp(kwl->kw[index].kw, kw, kwend - kw) == 0) &&
225 kwl->kw[index].kw[kwend-kw] == 0) {
226 if (kwl->kw[index].parse)
227 return &kwl->kw[index]; /* found it !*/
228 else
229 ret = &kwl->kw[index]; /* may be OK */
230 }
231 }
232 }
233 return ret;
234}
235
236/* Dumps all registered "server" keywords to the <out> string pointer. The
237 * unsupported keywords are only dumped if their supported form was not
238 * found.
239 */
240void srv_dump_kws(char **out)
241{
242 struct srv_kw_list *kwl;
243 int index;
244
Christopher Faulet784063e2020-05-18 12:14:18 +0200245 if (!out)
246 return;
247
Willy Tarreau21faa912012-10-10 08:27:36 +0200248 *out = NULL;
249 list_for_each_entry(kwl, &srv_keywords.list, list) {
250 for (index = 0; kwl->kw[index].kw != NULL; index++) {
251 if (kwl->kw[index].parse ||
252 srv_find_kw(kwl->kw[index].kw) == &kwl->kw[index]) {
253 memprintf(out, "%s[%4s] %s%s%s%s\n", *out ? *out : "",
254 kwl->scope,
255 kwl->kw[index].kw,
256 kwl->kw[index].skip ? " <arg>" : "",
257 kwl->kw[index].default_ok ? " [dflt_ok]" : "",
258 kwl->kw[index].parse ? "" : " (not supported)");
259 }
260 }
261 }
262}
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100263
Frédéric Lécaillef5bf9032017-03-10 11:51:05 +0100264/* Parse the "backup" server keyword */
265static int srv_parse_backup(char **args, int *cur_arg,
266 struct proxy *curproxy, struct server *newsrv, char **err)
267{
268 newsrv->flags |= SRV_F_BACKUP;
269 return 0;
270}
271
Alexander Liu2a54bb72019-05-22 19:44:48 +0800272
Frédéric Lécaille9d1b95b2017-03-15 09:13:33 +0100273/* Parse the "cookie" server keyword */
274static int srv_parse_cookie(char **args, int *cur_arg,
275 struct proxy *curproxy, struct server *newsrv, char **err)
276{
277 char *arg;
278
279 arg = args[*cur_arg + 1];
280 if (!*arg) {
281 memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
282 return ERR_ALERT | ERR_FATAL;
283 }
284
285 free(newsrv->cookie);
286 newsrv->cookie = strdup(arg);
287 newsrv->cklen = strlen(arg);
288 newsrv->flags |= SRV_F_COOKIESET;
289 return 0;
290}
291
Frédéric Lécaille2a0d0612017-03-21 11:53:54 +0100292/* Parse the "disabled" server keyword */
293static int srv_parse_disabled(char **args, int *cur_arg,
294 struct proxy *curproxy, struct server *newsrv, char **err)
295{
Emeric Brun52a91d32017-08-31 14:41:55 +0200296 newsrv->next_admin |= SRV_ADMF_CMAINT | SRV_ADMF_FMAINT;
297 newsrv->next_state = SRV_ST_STOPPED;
Frédéric Lécaille2a0d0612017-03-21 11:53:54 +0100298 newsrv->check.state |= CHK_ST_PAUSED;
299 newsrv->check.health = 0;
300 return 0;
301}
302
303/* Parse the "enabled" server keyword */
304static int srv_parse_enabled(char **args, int *cur_arg,
305 struct proxy *curproxy, struct server *newsrv, char **err)
306{
Emeric Brun52a91d32017-08-31 14:41:55 +0200307 newsrv->next_admin &= ~SRV_ADMF_CMAINT & ~SRV_ADMF_FMAINT;
308 newsrv->next_state = SRV_ST_RUNNING;
Frédéric Lécaille2a0d0612017-03-21 11:53:54 +0100309 newsrv->check.state &= ~CHK_ST_PAUSED;
310 newsrv->check.health = newsrv->check.rise;
311 return 0;
312}
313
Willy Tarreau9c538e02019-01-23 10:21:49 +0100314static int srv_parse_max_reuse(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
315{
316 char *arg;
317
318 arg = args[*cur_arg + 1];
319 if (!*arg) {
320 memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
321 return ERR_ALERT | ERR_FATAL;
322 }
323 newsrv->max_reuse = atoi(arg);
324
325 return 0;
326}
327
Olivier Houchardb7b3faa2018-12-14 18:15:36 +0100328static int srv_parse_pool_purge_delay(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
Olivier Houchard0c18a6f2018-12-02 14:11:41 +0100329{
330 const char *res;
331 char *arg;
332 unsigned int time;
333
334 arg = args[*cur_arg + 1];
335 if (!*arg) {
336 memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
337 return ERR_ALERT | ERR_FATAL;
338 }
339 res = parse_time_err(arg, &time, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +0200340 if (res == PARSE_TIME_OVER) {
341 memprintf(err, "timer overflow in argument '%s' to '%s' (maximum value is 2147483647 ms or ~24.8 days)",
342 args[*cur_arg+1], args[*cur_arg]);
343 return ERR_ALERT | ERR_FATAL;
344 }
345 else if (res == PARSE_TIME_UNDER) {
346 memprintf(err, "timer underflow in argument '%s' to '%s' (minimum non-null value is 1 ms)",
347 args[*cur_arg+1], args[*cur_arg]);
348 return ERR_ALERT | ERR_FATAL;
349 }
350 else if (res) {
Olivier Houchard0c18a6f2018-12-02 14:11:41 +0100351 memprintf(err, "unexpected character '%c' in argument to <%s>.\n",
352 *res, args[*cur_arg]);
353 return ERR_ALERT | ERR_FATAL;
354 }
Olivier Houchardb7b3faa2018-12-14 18:15:36 +0100355 newsrv->pool_purge_delay = time;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +0100356
357 return 0;
358}
359
Willy Tarreau2f3f4d32020-07-01 07:43:51 +0200360static int srv_parse_pool_low_conn(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
361{
362 char *arg;
363
364 arg = args[*cur_arg + 1];
365 if (!*arg) {
366 memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
367 return ERR_ALERT | ERR_FATAL;
368 }
369
370 newsrv->low_idle_conns = atoi(arg);
371 return 0;
372}
373
Olivier Houchard006e3102018-12-10 18:30:32 +0100374static int srv_parse_pool_max_conn(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
375{
376 char *arg;
377
378 arg = args[*cur_arg + 1];
379 if (!*arg) {
380 memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
381 return ERR_ALERT | ERR_FATAL;
382 }
Willy Tarreaucb923d52019-01-23 10:39:27 +0100383
Olivier Houchard006e3102018-12-10 18:30:32 +0100384 newsrv->max_idle_conns = atoi(arg);
Willy Tarreaucb923d52019-01-23 10:39:27 +0100385 if ((int)newsrv->max_idle_conns < -1) {
386 memprintf(err, "'%s' must be >= -1", args[*cur_arg]);
387 return ERR_ALERT | ERR_FATAL;
388 }
Olivier Houchard006e3102018-12-10 18:30:32 +0100389
390 return 0;
391}
392
Willy Tarreaudff55432012-10-10 17:51:05 +0200393/* parse the "id" server keyword */
394static int srv_parse_id(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
395{
396 struct eb32_node *node;
397
398 if (!*args[*cur_arg + 1]) {
399 memprintf(err, "'%s' : expects an integer argument", args[*cur_arg]);
400 return ERR_ALERT | ERR_FATAL;
401 }
402
403 newsrv->puid = atol(args[*cur_arg + 1]);
404 newsrv->conf.id.key = newsrv->puid;
405
406 if (newsrv->puid <= 0) {
407 memprintf(err, "'%s' : custom id has to be > 0", args[*cur_arg]);
408 return ERR_ALERT | ERR_FATAL;
409 }
410
411 node = eb32_lookup(&curproxy->conf.used_server_id, newsrv->puid);
412 if (node) {
413 struct server *target = container_of(node, struct server, conf.id);
414 memprintf(err, "'%s' : custom id %d already used at %s:%d ('server %s')",
415 args[*cur_arg], newsrv->puid, target->conf.file, target->conf.line,
416 target->id);
417 return ERR_ALERT | ERR_FATAL;
418 }
419
420 eb32_insert(&curproxy->conf.used_server_id, &newsrv->conf.id);
Baptiste Assmann7cc419a2015-07-07 22:02:20 +0200421 newsrv->flags |= SRV_F_FORCED_ID;
Willy Tarreaudff55432012-10-10 17:51:05 +0200422 return 0;
423}
424
Frédéric Lécaille22f41a22017-03-16 17:17:36 +0100425/* Parse the "namespace" server keyword */
426static int srv_parse_namespace(char **args, int *cur_arg,
427 struct proxy *curproxy, struct server *newsrv, char **err)
428{
Willy Tarreaue5733232019-05-22 19:24:06 +0200429#ifdef USE_NS
Frédéric Lécaille22f41a22017-03-16 17:17:36 +0100430 char *arg;
431
432 arg = args[*cur_arg + 1];
433 if (!*arg) {
434 memprintf(err, "'%s' : expects <name> as argument", args[*cur_arg]);
435 return ERR_ALERT | ERR_FATAL;
436 }
437
438 if (!strcmp(arg, "*")) {
439 /* Use the namespace associated with the connection (if present). */
440 newsrv->flags |= SRV_F_USE_NS_FROM_PP;
441 return 0;
442 }
443
444 /*
445 * As this parser may be called several times for the same 'default-server'
446 * object, or for a new 'server' instance deriving from a 'default-server'
447 * one with SRV_F_USE_NS_FROM_PP flag enabled, let's reset it.
448 */
449 newsrv->flags &= ~SRV_F_USE_NS_FROM_PP;
450
451 newsrv->netns = netns_store_lookup(arg, strlen(arg));
452 if (!newsrv->netns)
453 newsrv->netns = netns_store_insert(arg);
454
455 if (!newsrv->netns) {
456 memprintf(err, "Cannot open namespace '%s'", arg);
457 return ERR_ALERT | ERR_FATAL;
458 }
459
460 return 0;
461#else
462 memprintf(err, "'%s': '%s' option not implemented", args[0], args[*cur_arg]);
463 return ERR_ALERT | ERR_FATAL;
464#endif
465}
466
Frédéric Lécaillef5bf9032017-03-10 11:51:05 +0100467/* Parse the "no-backup" server keyword */
468static int srv_parse_no_backup(char **args, int *cur_arg,
469 struct proxy *curproxy, struct server *newsrv, char **err)
470{
471 newsrv->flags &= ~SRV_F_BACKUP;
472 return 0;
473}
474
Frédéric Lécaille25df8902017-03-10 14:04:31 +0100475
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100476/* Disable server PROXY protocol flags. */
Willy Tarreau0e492e22019-04-15 21:25:03 +0200477static inline int srv_disable_pp_flags(struct server *srv, unsigned int flags)
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100478{
479 srv->pp_opts &= ~flags;
480 return 0;
481}
482
483/* Parse the "no-send-proxy" server keyword */
484static int srv_parse_no_send_proxy(char **args, int *cur_arg,
485 struct proxy *curproxy, struct server *newsrv, char **err)
486{
487 return srv_disable_pp_flags(newsrv, SRV_PP_V1);
488}
489
490/* Parse the "no-send-proxy-v2" server keyword */
491static int srv_parse_no_send_proxy_v2(char **args, int *cur_arg,
492 struct proxy *curproxy, struct server *newsrv, char **err)
493{
494 return srv_disable_pp_flags(newsrv, SRV_PP_V2);
495}
496
Frédéric Lécaille1b9423d2019-07-04 14:19:06 +0200497/* Parse the "no-tfo" server keyword */
498static int srv_parse_no_tfo(char **args, int *cur_arg,
499 struct proxy *curproxy, struct server *newsrv, char **err)
500{
501 newsrv->flags &= ~SRV_F_FASTOPEN;
502 return 0;
503}
504
Frédéric Lécaillef9bc1d62017-03-10 15:50:49 +0100505/* Parse the "non-stick" server keyword */
506static int srv_parse_non_stick(char **args, int *cur_arg,
507 struct proxy *curproxy, struct server *newsrv, char **err)
508{
509 newsrv->flags |= SRV_F_NON_STICK;
510 return 0;
511}
512
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100513/* Enable server PROXY protocol flags. */
Willy Tarreau0e492e22019-04-15 21:25:03 +0200514static inline int srv_enable_pp_flags(struct server *srv, unsigned int flags)
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100515{
516 srv->pp_opts |= flags;
517 return 0;
518}
Christopher Faulet8ed0a3e2018-04-10 14:45:45 +0200519/* parse the "proto" server keyword */
520static int srv_parse_proto(char **args, int *cur_arg,
521 struct proxy *px, struct server *newsrv, char **err)
522{
523 struct ist proto;
524
525 if (!*args[*cur_arg + 1]) {
526 memprintf(err, "'%s' : missing value", args[*cur_arg]);
527 return ERR_ALERT | ERR_FATAL;
528 }
529 proto = ist2(args[*cur_arg + 1], strlen(args[*cur_arg + 1]));
530 newsrv->mux_proto = get_mux_proto(proto);
531 if (!newsrv->mux_proto) {
532 memprintf(err, "'%s' : unknown MUX protocol '%s'", args[*cur_arg], args[*cur_arg+1]);
533 return ERR_ALERT | ERR_FATAL;
534 }
Christopher Faulet8ed0a3e2018-04-10 14:45:45 +0200535 return 0;
536}
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100537
Emmanuel Hocdetf643b802018-02-01 15:20:32 +0100538/* parse the "proxy-v2-options" */
539static int srv_parse_proxy_v2_options(char **args, int *cur_arg,
540 struct proxy *px, struct server *newsrv, char **err)
541{
542 char *p, *n;
543 for (p = args[*cur_arg+1]; p; p = n) {
544 n = strchr(p, ',');
545 if (n)
546 *n++ = '\0';
547 if (!strcmp(p, "ssl")) {
548 newsrv->pp_opts |= SRV_PP_V2_SSL;
549 } else if (!strcmp(p, "cert-cn")) {
550 newsrv->pp_opts |= SRV_PP_V2_SSL;
551 newsrv->pp_opts |= SRV_PP_V2_SSL_CN;
Emmanuel Hocdetfa8d0f12018-02-01 15:53:52 +0100552 } else if (!strcmp(p, "cert-key")) {
553 newsrv->pp_opts |= SRV_PP_V2_SSL;
554 newsrv->pp_opts |= SRV_PP_V2_SSL_KEY_ALG;
555 } else if (!strcmp(p, "cert-sig")) {
556 newsrv->pp_opts |= SRV_PP_V2_SSL;
557 newsrv->pp_opts |= SRV_PP_V2_SSL_SIG_ALG;
558 } else if (!strcmp(p, "ssl-cipher")) {
559 newsrv->pp_opts |= SRV_PP_V2_SSL;
560 newsrv->pp_opts |= SRV_PP_V2_SSL_CIPHER;
Emmanuel Hocdet253c3b72018-02-01 18:29:59 +0100561 } else if (!strcmp(p, "authority")) {
562 newsrv->pp_opts |= SRV_PP_V2_AUTHORITY;
Emmanuel Hocdet4399c752018-02-05 15:26:43 +0100563 } else if (!strcmp(p, "crc32c")) {
564 newsrv->pp_opts |= SRV_PP_V2_CRC32C;
Tim Duesterhuscf6e0c82020-03-13 12:34:24 +0100565 } else if (!strcmp(p, "unique-id")) {
566 newsrv->pp_opts |= SRV_PP_V2_UNIQUE_ID;
Emmanuel Hocdetf643b802018-02-01 15:20:32 +0100567 } else
568 goto fail;
569 }
570 return 0;
571 fail:
572 if (err)
573 memprintf(err, "'%s' : proxy v2 option not implemented", p);
574 return ERR_ALERT | ERR_FATAL;
575}
576
Frédéric Lécaille547356e2017-03-15 08:55:39 +0100577/* Parse the "observe" server keyword */
578static int srv_parse_observe(char **args, int *cur_arg,
579 struct proxy *curproxy, struct server *newsrv, char **err)
580{
581 char *arg;
582
583 arg = args[*cur_arg + 1];
584 if (!*arg) {
585 memprintf(err, "'%s' expects <mode> as argument.\n", args[*cur_arg]);
586 return ERR_ALERT | ERR_FATAL;
587 }
588
589 if (!strcmp(arg, "none")) {
590 newsrv->observe = HANA_OBS_NONE;
591 }
592 else if (!strcmp(arg, "layer4")) {
593 newsrv->observe = HANA_OBS_LAYER4;
594 }
595 else if (!strcmp(arg, "layer7")) {
596 if (curproxy->mode != PR_MODE_HTTP) {
597 memprintf(err, "'%s' can only be used in http proxies.\n", arg);
598 return ERR_ALERT;
599 }
600 newsrv->observe = HANA_OBS_LAYER7;
601 }
602 else {
603 memprintf(err, "'%s' expects one of 'none', 'layer4', 'layer7' "
604 "but got '%s'\n", args[*cur_arg], arg);
605 return ERR_ALERT | ERR_FATAL;
606 }
607
608 return 0;
609}
610
Frédéric Lécaille16186232017-03-14 16:42:49 +0100611/* Parse the "redir" server keyword */
612static int srv_parse_redir(char **args, int *cur_arg,
613 struct proxy *curproxy, struct server *newsrv, char **err)
614{
615 char *arg;
616
617 arg = args[*cur_arg + 1];
618 if (!*arg) {
619 memprintf(err, "'%s' expects <prefix> as argument.\n", args[*cur_arg]);
620 return ERR_ALERT | ERR_FATAL;
621 }
622
623 free(newsrv->rdr_pfx);
624 newsrv->rdr_pfx = strdup(arg);
625 newsrv->rdr_len = strlen(arg);
626
627 return 0;
628}
629
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100630/* Parse the "send-proxy" server keyword */
631static int srv_parse_send_proxy(char **args, int *cur_arg,
632 struct proxy *curproxy, struct server *newsrv, char **err)
633{
634 return srv_enable_pp_flags(newsrv, SRV_PP_V1);
635}
636
637/* Parse the "send-proxy-v2" server keyword */
638static int srv_parse_send_proxy_v2(char **args, int *cur_arg,
639 struct proxy *curproxy, struct server *newsrv, char **err)
640{
641 return srv_enable_pp_flags(newsrv, SRV_PP_V2);
642}
643
Frédéric Lécailledba97072017-03-17 15:33:50 +0100644
645/* Parse the "source" server keyword */
646static int srv_parse_source(char **args, int *cur_arg,
647 struct proxy *curproxy, struct server *newsrv, char **err)
648{
649 char *errmsg;
650 int port_low, port_high;
651 struct sockaddr_storage *sk;
Frédéric Lécailledba97072017-03-17 15:33:50 +0100652
653 errmsg = NULL;
654
655 if (!*args[*cur_arg + 1]) {
656 memprintf(err, "'%s' expects <addr>[:<port>[-<port>]], and optionally '%s' <addr>, "
657 "and '%s' <name> as argument.\n", args[*cur_arg], "usesrc", "interface");
658 goto err;
659 }
660
661 /* 'sk' is statically allocated (no need to be freed). */
Willy Tarreau65ec4e32020-09-16 19:17:08 +0200662 sk = str2sa_range(args[*cur_arg + 1], NULL, &port_low, &port_high, NULL, NULL,
663 &errmsg, NULL, NULL,
664 PA_O_RESOLVE | PA_O_PORT_OK | PA_O_PORT_RANGE | PA_O_STREAM | PA_O_CONNECT);
Frédéric Lécailledba97072017-03-17 15:33:50 +0100665 if (!sk) {
666 memprintf(err, "'%s %s' : %s\n", args[*cur_arg], args[*cur_arg + 1], errmsg);
667 goto err;
668 }
669
Frédéric Lécailledba97072017-03-17 15:33:50 +0100670 newsrv->conn_src.opts |= CO_SRC_BIND;
671 newsrv->conn_src.source_addr = *sk;
672
673 if (port_low != port_high) {
674 int i;
675
Frédéric Lécailledba97072017-03-17 15:33:50 +0100676 newsrv->conn_src.sport_range = port_range_alloc_range(port_high - port_low + 1);
Remi Tricot-Le Bretonaf821672021-05-12 09:44:06 +0200677 if (!newsrv->conn_src.sport_range) {
678 ha_alert("Server '%s': Out of memory (sport_range)\n", args[0]);
679 goto err;
680 }
Frédéric Lécailledba97072017-03-17 15:33:50 +0100681 for (i = 0; i < newsrv->conn_src.sport_range->size; i++)
682 newsrv->conn_src.sport_range->ports[i] = port_low + i;
683 }
684
685 *cur_arg += 2;
686 while (*(args[*cur_arg])) {
687 if (!strcmp(args[*cur_arg], "usesrc")) { /* address to use outside */
688#if defined(CONFIG_HAP_TRANSPARENT)
689 if (!*args[*cur_arg + 1]) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100690 ha_alert("'usesrc' expects <addr>[:<port>], 'client', 'clientip', "
691 "or 'hdr_ip(name,#)' as argument.\n");
Frédéric Lécailledba97072017-03-17 15:33:50 +0100692 goto err;
693 }
694 if (!strcmp(args[*cur_arg + 1], "client")) {
695 newsrv->conn_src.opts &= ~CO_SRC_TPROXY_MASK;
696 newsrv->conn_src.opts |= CO_SRC_TPROXY_CLI;
697 }
698 else if (!strcmp(args[*cur_arg + 1], "clientip")) {
699 newsrv->conn_src.opts &= ~CO_SRC_TPROXY_MASK;
700 newsrv->conn_src.opts |= CO_SRC_TPROXY_CIP;
701 }
702 else if (!strncmp(args[*cur_arg + 1], "hdr_ip(", 7)) {
703 char *name, *end;
704
705 name = args[*cur_arg + 1] + 7;
Willy Tarreau90807112020-02-25 08:16:33 +0100706 while (isspace((unsigned char)*name))
Frédéric Lécailledba97072017-03-17 15:33:50 +0100707 name++;
708
709 end = name;
Willy Tarreau90807112020-02-25 08:16:33 +0100710 while (*end && !isspace((unsigned char)*end) && *end != ',' && *end != ')')
Frédéric Lécailledba97072017-03-17 15:33:50 +0100711 end++;
712
713 newsrv->conn_src.opts &= ~CO_SRC_TPROXY_MASK;
714 newsrv->conn_src.opts |= CO_SRC_TPROXY_DYN;
715 free(newsrv->conn_src.bind_hdr_name);
716 newsrv->conn_src.bind_hdr_name = calloc(1, end - name + 1);
Remi Tricot-Le Bretonaf821672021-05-12 09:44:06 +0200717 if (!newsrv->conn_src.bind_hdr_name) {
718 ha_alert("Server '%s': Out of memory (bind_hdr_name)\n", args[0]);
719 goto err;
720 }
Frédéric Lécailledba97072017-03-17 15:33:50 +0100721 newsrv->conn_src.bind_hdr_len = end - name;
722 memcpy(newsrv->conn_src.bind_hdr_name, name, end - name);
723 newsrv->conn_src.bind_hdr_name[end - name] = '\0';
724 newsrv->conn_src.bind_hdr_occ = -1;
725
726 /* now look for an occurrence number */
Willy Tarreau90807112020-02-25 08:16:33 +0100727 while (isspace((unsigned char)*end))
Frédéric Lécailledba97072017-03-17 15:33:50 +0100728 end++;
729 if (*end == ',') {
730 end++;
731 name = end;
732 if (*end == '-')
733 end++;
Willy Tarreau90807112020-02-25 08:16:33 +0100734 while (isdigit((unsigned char)*end))
Frédéric Lécailledba97072017-03-17 15:33:50 +0100735 end++;
736 newsrv->conn_src.bind_hdr_occ = strl2ic(name, end - name);
737 }
738
739 if (newsrv->conn_src.bind_hdr_occ < -MAX_HDR_HISTORY) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100740 ha_alert("usesrc hdr_ip(name,num) does not support negative"
741 " occurrences values smaller than %d.\n", MAX_HDR_HISTORY);
Frédéric Lécailledba97072017-03-17 15:33:50 +0100742 goto err;
743 }
744 }
745 else {
746 struct sockaddr_storage *sk;
747 int port1, port2;
748
749 /* 'sk' is statically allocated (no need to be freed). */
Willy Tarreau65ec4e32020-09-16 19:17:08 +0200750 sk = str2sa_range(args[*cur_arg + 1], NULL, &port1, &port2, NULL, NULL,
751 &errmsg, NULL, NULL,
752 PA_O_RESOLVE | PA_O_PORT_OK | PA_O_STREAM | PA_O_CONNECT);
Frédéric Lécailledba97072017-03-17 15:33:50 +0100753 if (!sk) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100754 ha_alert("'%s %s' : %s\n", args[*cur_arg], args[*cur_arg + 1], errmsg);
Frédéric Lécailledba97072017-03-17 15:33:50 +0100755 goto err;
756 }
757
Frédéric Lécailledba97072017-03-17 15:33:50 +0100758 newsrv->conn_src.tproxy_addr = *sk;
759 newsrv->conn_src.opts |= CO_SRC_TPROXY_ADDR;
760 }
761 global.last_checks |= LSTCHK_NETADM;
762 *cur_arg += 2;
763 continue;
764#else /* no TPROXY support */
Christopher Faulet767a84b2017-11-24 16:50:31 +0100765 ha_alert("'usesrc' not allowed here because support for TPROXY was not compiled in.\n");
Frédéric Lécailledba97072017-03-17 15:33:50 +0100766 goto err;
767#endif /* defined(CONFIG_HAP_TRANSPARENT) */
768 } /* "usesrc" */
769
770 if (!strcmp(args[*cur_arg], "interface")) { /* specifically bind to this interface */
771#ifdef SO_BINDTODEVICE
772 if (!*args[*cur_arg + 1]) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100773 ha_alert("'%s' : missing interface name.\n", args[0]);
Frédéric Lécailledba97072017-03-17 15:33:50 +0100774 goto err;
775 }
776 free(newsrv->conn_src.iface_name);
777 newsrv->conn_src.iface_name = strdup(args[*cur_arg + 1]);
778 newsrv->conn_src.iface_len = strlen(newsrv->conn_src.iface_name);
779 global.last_checks |= LSTCHK_NETADM;
780#else
Christopher Faulet767a84b2017-11-24 16:50:31 +0100781 ha_alert("'%s' : '%s' option not implemented.\n", args[0], args[*cur_arg]);
Frédéric Lécailledba97072017-03-17 15:33:50 +0100782 goto err;
783#endif
784 *cur_arg += 2;
785 continue;
786 }
787 /* this keyword in not an option of "source" */
788 break;
789 } /* while */
790
791 return 0;
792
793 err:
794 free(errmsg);
795 return ERR_ALERT | ERR_FATAL;
796}
797
Frédéric Lécaillef9bc1d62017-03-10 15:50:49 +0100798/* Parse the "stick" server keyword */
799static int srv_parse_stick(char **args, int *cur_arg,
800 struct proxy *curproxy, struct server *newsrv, char **err)
801{
802 newsrv->flags &= ~SRV_F_NON_STICK;
803 return 0;
804}
805
Frédéric Lécaille67e0e612017-03-14 15:21:31 +0100806/* Parse the "track" server keyword */
807static int srv_parse_track(char **args, int *cur_arg,
808 struct proxy *curproxy, struct server *newsrv, char **err)
809{
810 char *arg;
811
812 arg = args[*cur_arg + 1];
813 if (!*arg) {
814 memprintf(err, "'track' expects [<proxy>/]<server> as argument.\n");
815 return ERR_ALERT | ERR_FATAL;
816 }
817
818 free(newsrv->trackit);
819 newsrv->trackit = strdup(arg);
820
821 return 0;
Alexander Liu2a54bb72019-05-22 19:44:48 +0800822}
823
824/* Parse the "socks4" server keyword */
825static int srv_parse_socks4(char **args, int *cur_arg,
826 struct proxy *curproxy, struct server *newsrv, char **err)
827{
828 char *errmsg;
829 int port_low, port_high;
830 struct sockaddr_storage *sk;
Alexander Liu2a54bb72019-05-22 19:44:48 +0800831
832 errmsg = NULL;
833
834 if (!*args[*cur_arg + 1]) {
835 memprintf(err, "'%s' expects <addr>:<port> as argument.\n", args[*cur_arg]);
836 goto err;
837 }
838
839 /* 'sk' is statically allocated (no need to be freed). */
Willy Tarreau65ec4e32020-09-16 19:17:08 +0200840 sk = str2sa_range(args[*cur_arg + 1], NULL, &port_low, &port_high, NULL, NULL,
841 &errmsg, NULL, NULL,
842 PA_O_RESOLVE | PA_O_PORT_OK | PA_O_PORT_MAND | PA_O_STREAM | PA_O_CONNECT);
Alexander Liu2a54bb72019-05-22 19:44:48 +0800843 if (!sk) {
844 memprintf(err, "'%s %s' : %s\n", args[*cur_arg], args[*cur_arg + 1], errmsg);
845 goto err;
846 }
847
Alexander Liu2a54bb72019-05-22 19:44:48 +0800848 newsrv->flags |= SRV_F_SOCKS4_PROXY;
849 newsrv->socks4_addr = *sk;
850
Alexander Liu2a54bb72019-05-22 19:44:48 +0800851 return 0;
852
853 err:
854 free(errmsg);
855 return ERR_ALERT | ERR_FATAL;
Frédéric Lécaille67e0e612017-03-14 15:21:31 +0100856}
857
Frédéric Lécailledba97072017-03-17 15:33:50 +0100858
Willy Tarreau034c88c2017-01-23 23:36:45 +0100859/* parse the "tfo" server keyword */
860static int srv_parse_tfo(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
861{
862 newsrv->flags |= SRV_F_FASTOPEN;
863 return 0;
864}
865
Willy Tarreau4aac7db2014-05-16 11:48:10 +0200866/* Shutdown all connections of a server. The caller must pass a termination
Willy Tarreaue7dff022015-04-03 01:14:29 +0200867 * code in <why>, which must be one of SF_ERR_* indicating the reason for the
Willy Tarreau4aac7db2014-05-16 11:48:10 +0200868 * shutdown.
Willy Tarreau46b7f532018-08-21 11:54:26 +0200869 *
870 * Must be called with the server lock held.
Willy Tarreau4aac7db2014-05-16 11:48:10 +0200871 */
Willy Tarreau87b09662015-04-03 00:22:06 +0200872void srv_shutdown_streams(struct server *srv, int why)
Willy Tarreau4aac7db2014-05-16 11:48:10 +0200873{
Willy Tarreau49e10802021-02-17 13:33:24 +0100874 struct stream *stream;
875 struct mt_list *elt1, elt2;
Willy Tarreau72653c52021-03-04 10:47:54 +0100876 int thr;
Willy Tarreau4aac7db2014-05-16 11:48:10 +0200877
Willy Tarreau72653c52021-03-04 10:47:54 +0100878 for (thr = 0; thr < global.nbthread; thr++)
879 mt_list_for_each_entry_safe(stream, &srv->actconns[thr], by_srv, elt1, elt2)
880 if (stream->srv_conn == srv)
881 stream_shutdown(stream, why);
Willy Tarreau4aac7db2014-05-16 11:48:10 +0200882}
883
884/* Shutdown all connections of all backup servers of a proxy. The caller must
Willy Tarreaue7dff022015-04-03 01:14:29 +0200885 * pass a termination code in <why>, which must be one of SF_ERR_* indicating
Willy Tarreau4aac7db2014-05-16 11:48:10 +0200886 * the reason for the shutdown.
Willy Tarreau46b7f532018-08-21 11:54:26 +0200887 *
888 * Must be called with the server lock held.
Willy Tarreau4aac7db2014-05-16 11:48:10 +0200889 */
Willy Tarreau87b09662015-04-03 00:22:06 +0200890void srv_shutdown_backup_streams(struct proxy *px, int why)
Willy Tarreau4aac7db2014-05-16 11:48:10 +0200891{
892 struct server *srv;
893
894 for (srv = px->srv; srv != NULL; srv = srv->next)
895 if (srv->flags & SRV_F_BACKUP)
Willy Tarreau87b09662015-04-03 00:22:06 +0200896 srv_shutdown_streams(srv, why);
Willy Tarreau4aac7db2014-05-16 11:48:10 +0200897}
898
Willy Tarreaubda92272014-05-20 21:55:30 +0200899/* Appends some information to a message string related to a server going UP or
900 * DOWN. If both <forced> and <reason> are null and the server tracks another
901 * one, a "via" information will be provided to know where the status came from.
Emeric Brun5a133512017-10-19 14:42:30 +0200902 * If <check> is non-null, an entire string describing the check result will be
903 * appended after a comma and a space (eg: to report some information from the
904 * check that changed the state). In the other case, the string will be built
905 * using the check results stored into the struct server if present.
906 * If <xferred> is non-negative, some information about requeued sessions are
Willy Tarreaubda92272014-05-20 21:55:30 +0200907 * provided.
Willy Tarreau46b7f532018-08-21 11:54:26 +0200908 *
909 * Must be called with the server lock held.
Willy Tarreaua0066dd2014-05-16 11:25:16 +0200910 */
Willy Tarreau83061a82018-07-13 11:56:34 +0200911void srv_append_status(struct buffer *msg, struct server *s,
912 struct check *check, int xferred, int forced)
Willy Tarreaua0066dd2014-05-16 11:25:16 +0200913{
Emeric Brun5a133512017-10-19 14:42:30 +0200914 short status = s->op_st_chg.status;
915 short code = s->op_st_chg.code;
916 long duration = s->op_st_chg.duration;
917 char *desc = s->op_st_chg.reason;
918
919 if (check) {
920 status = check->status;
921 code = check->code;
922 duration = check->duration;
923 desc = check->desc;
924 }
925
926 if (status != -1) {
927 chunk_appendf(msg, ", reason: %s", get_check_status_description(status));
928
929 if (status >= HCHK_STATUS_L57DATA)
930 chunk_appendf(msg, ", code: %d", code);
931
932 if (desc && *desc) {
Willy Tarreau83061a82018-07-13 11:56:34 +0200933 struct buffer src;
Emeric Brun5a133512017-10-19 14:42:30 +0200934
935 chunk_appendf(msg, ", info: \"");
936
937 chunk_initlen(&src, desc, 0, strlen(desc));
938 chunk_asciiencode(msg, &src, '"');
939
940 chunk_appendf(msg, "\"");
941 }
942
943 if (duration >= 0)
944 chunk_appendf(msg, ", check duration: %ldms", duration);
945 }
946 else if (desc && *desc) {
947 chunk_appendf(msg, ", %s", desc);
948 }
949 else if (!forced && s->track) {
Willy Tarreaubda92272014-05-20 21:55:30 +0200950 chunk_appendf(msg, " via %s/%s", s->track->proxy->id, s->track->id);
Emeric Brun5a133512017-10-19 14:42:30 +0200951 }
Willy Tarreaua0066dd2014-05-16 11:25:16 +0200952
953 if (xferred >= 0) {
Emeric Brun52a91d32017-08-31 14:41:55 +0200954 if (s->next_state == SRV_ST_STOPPED)
Willy Tarreaua0066dd2014-05-16 11:25:16 +0200955 chunk_appendf(msg, ". %d active and %d backup servers left.%s"
956 " %d sessions active, %d requeued, %d remaining in queue",
957 s->proxy->srv_act, s->proxy->srv_bck,
958 (s->proxy->srv_bck && !s->proxy->srv_act) ? " Running on backup." : "",
959 s->cur_sess, xferred, s->nbpend);
960 else
961 chunk_appendf(msg, ". %d active and %d backup servers online.%s"
962 " %d sessions requeued, %d total in queue",
963 s->proxy->srv_act, s->proxy->srv_bck,
964 (s->proxy->srv_bck && !s->proxy->srv_act) ? " Running on backup." : "",
965 xferred, s->nbpend);
966 }
967}
968
Emeric Brun5a133512017-10-19 14:42:30 +0200969/* Marks server <s> down, regardless of its checks' statuses. The server is
970 * registered in a list to postpone the counting of the remaining servers on
971 * the proxy and transfers queued streams whenever possible to other servers at
972 * a sync point. Maintenance servers are ignored. It stores the <reason> if
973 * non-null as the reason for going down or the available data from the check
974 * struct to recompute this reason later.
Willy Tarreau46b7f532018-08-21 11:54:26 +0200975 *
976 * Must be called with the server lock held.
Willy Tarreaue7d1ef12014-05-20 22:25:12 +0200977 */
Emeric Brun5a133512017-10-19 14:42:30 +0200978void srv_set_stopped(struct server *s, const char *reason, struct check *check)
Willy Tarreaue7d1ef12014-05-20 22:25:12 +0200979{
980 struct server *srv;
Willy Tarreaue7d1ef12014-05-20 22:25:12 +0200981
Emeric Brun64cc49c2017-10-03 14:46:45 +0200982 if ((s->cur_admin & SRV_ADMF_MAINT) || s->next_state == SRV_ST_STOPPED)
Willy Tarreaue7d1ef12014-05-20 22:25:12 +0200983 return;
984
Emeric Brun52a91d32017-08-31 14:41:55 +0200985 s->next_state = SRV_ST_STOPPED;
Emeric Brun5a133512017-10-19 14:42:30 +0200986 *s->op_st_chg.reason = 0;
987 s->op_st_chg.status = -1;
988 if (reason) {
989 strlcpy2(s->op_st_chg.reason, reason, sizeof(s->op_st_chg.reason));
990 }
991 else if (check) {
Willy Tarreau358847f2017-11-20 21:33:21 +0100992 strlcpy2(s->op_st_chg.reason, check->desc, sizeof(s->op_st_chg.reason));
Emeric Brun5a133512017-10-19 14:42:30 +0200993 s->op_st_chg.code = check->code;
994 s->op_st_chg.status = check->status;
995 s->op_st_chg.duration = check->duration;
996 }
Willy Tarreaue7d1ef12014-05-20 22:25:12 +0200997
Willy Tarreaueeba36b2018-08-21 08:22:26 +0200998 /* propagate changes */
Willy Tarreaueeba36b2018-08-21 08:22:26 +0200999 srv_update_status(s);
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001000
Emeric Brun9f0b4582017-10-23 14:39:51 +02001001 for (srv = s->trackers; srv; srv = srv->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001002 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Emeric Brun5a133512017-10-19 14:42:30 +02001003 srv_set_stopped(srv, NULL, NULL);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001004 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02001005 }
Willy Tarreaue7d1ef12014-05-20 22:25:12 +02001006}
1007
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001008/* Marks server <s> up regardless of its checks' statuses and provided it isn't
Emeric Brun5a133512017-10-19 14:42:30 +02001009 * in maintenance. The server is registered in a list to postpone the counting
1010 * of the remaining servers on the proxy and tries to grab requests from the
1011 * proxy at a sync point. Maintenance servers are ignored. It stores the
1012 * <reason> if non-null as the reason for going down or the available data
1013 * from the check struct to recompute this reason later.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001014 *
1015 * Must be called with the server lock held.
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001016 */
Emeric Brun5a133512017-10-19 14:42:30 +02001017void srv_set_running(struct server *s, const char *reason, struct check *check)
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001018{
1019 struct server *srv;
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001020
Emeric Brun64cc49c2017-10-03 14:46:45 +02001021 if (s->cur_admin & SRV_ADMF_MAINT)
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001022 return;
1023
Emeric Brun52a91d32017-08-31 14:41:55 +02001024 if (s->next_state == SRV_ST_STARTING || s->next_state == SRV_ST_RUNNING)
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001025 return;
1026
Emeric Brun52a91d32017-08-31 14:41:55 +02001027 s->next_state = SRV_ST_STARTING;
Emeric Brun5a133512017-10-19 14:42:30 +02001028 *s->op_st_chg.reason = 0;
1029 s->op_st_chg.status = -1;
1030 if (reason) {
1031 strlcpy2(s->op_st_chg.reason, reason, sizeof(s->op_st_chg.reason));
1032 }
1033 else if (check) {
Willy Tarreau358847f2017-11-20 21:33:21 +01001034 strlcpy2(s->op_st_chg.reason, check->desc, sizeof(s->op_st_chg.reason));
Emeric Brun5a133512017-10-19 14:42:30 +02001035 s->op_st_chg.code = check->code;
1036 s->op_st_chg.status = check->status;
1037 s->op_st_chg.duration = check->duration;
1038 }
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001039
Emeric Brun64cc49c2017-10-03 14:46:45 +02001040 if (s->slowstart <= 0)
1041 s->next_state = SRV_ST_RUNNING;
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001042
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001043 /* propagate changes */
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001044 srv_update_status(s);
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001045
Emeric Brun9f0b4582017-10-23 14:39:51 +02001046 for (srv = s->trackers; srv; srv = srv->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001047 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Emeric Brun5a133512017-10-19 14:42:30 +02001048 srv_set_running(srv, NULL, NULL);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001049 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02001050 }
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001051}
1052
Willy Tarreau8eb77842014-05-21 13:54:57 +02001053/* Marks server <s> stopping regardless of its checks' statuses and provided it
Emeric Brun5a133512017-10-19 14:42:30 +02001054 * isn't in maintenance. The server is registered in a list to postpone the
1055 * counting of the remaining servers on the proxy and tries to grab requests
1056 * from the proxy. Maintenance servers are ignored. It stores the
1057 * <reason> if non-null as the reason for going down or the available data
1058 * from the check struct to recompute this reason later.
Willy Tarreau8eb77842014-05-21 13:54:57 +02001059 * up. Note that it makes use of the trash to build the log strings, so <reason>
1060 * must not be placed there.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001061 *
1062 * Must be called with the server lock held.
Willy Tarreau8eb77842014-05-21 13:54:57 +02001063 */
Emeric Brun5a133512017-10-19 14:42:30 +02001064void srv_set_stopping(struct server *s, const char *reason, struct check *check)
Willy Tarreau8eb77842014-05-21 13:54:57 +02001065{
1066 struct server *srv;
Willy Tarreau8eb77842014-05-21 13:54:57 +02001067
Emeric Brun64cc49c2017-10-03 14:46:45 +02001068 if (s->cur_admin & SRV_ADMF_MAINT)
Willy Tarreau8eb77842014-05-21 13:54:57 +02001069 return;
1070
Emeric Brun52a91d32017-08-31 14:41:55 +02001071 if (s->next_state == SRV_ST_STOPPING)
Willy Tarreau8eb77842014-05-21 13:54:57 +02001072 return;
1073
Emeric Brun52a91d32017-08-31 14:41:55 +02001074 s->next_state = SRV_ST_STOPPING;
Emeric Brun5a133512017-10-19 14:42:30 +02001075 *s->op_st_chg.reason = 0;
1076 s->op_st_chg.status = -1;
1077 if (reason) {
1078 strlcpy2(s->op_st_chg.reason, reason, sizeof(s->op_st_chg.reason));
1079 }
1080 else if (check) {
Willy Tarreau358847f2017-11-20 21:33:21 +01001081 strlcpy2(s->op_st_chg.reason, check->desc, sizeof(s->op_st_chg.reason));
Emeric Brun5a133512017-10-19 14:42:30 +02001082 s->op_st_chg.code = check->code;
1083 s->op_st_chg.status = check->status;
1084 s->op_st_chg.duration = check->duration;
1085 }
Willy Tarreau8eb77842014-05-21 13:54:57 +02001086
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001087 /* propagate changes */
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001088 srv_update_status(s);
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001089
Emeric Brun9f0b4582017-10-23 14:39:51 +02001090 for (srv = s->trackers; srv; srv = srv->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001091 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Emeric Brun5a133512017-10-19 14:42:30 +02001092 srv_set_stopping(srv, NULL, NULL);
Christopher Faulet8d01fd62018-01-24 21:49:41 +01001093 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02001094 }
Willy Tarreau8eb77842014-05-21 13:54:57 +02001095}
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001096
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001097/* Enables admin flag <mode> (among SRV_ADMF_*) on server <s>. This is used to
1098 * enforce either maint mode or drain mode. It is not allowed to set more than
1099 * one flag at once. The equivalent "inherited" flag is propagated to all
1100 * tracking servers. Maintenance mode disables health checks (but not agent
1101 * checks). When either the flag is already set or no flag is passed, nothing
Willy Tarreau8b428482016-11-07 15:53:43 +01001102 * is done. If <cause> is non-null, it will be displayed at the end of the log
1103 * lines to justify the state change.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001104 *
1105 * Must be called with the server lock held.
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001106 */
Willy Tarreau8b428482016-11-07 15:53:43 +01001107void srv_set_admin_flag(struct server *s, enum srv_admin mode, const char *cause)
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001108{
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001109 struct server *srv;
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001110
1111 if (!mode)
1112 return;
1113
1114 /* stop going down as soon as we meet a server already in the same state */
Emeric Brun52a91d32017-08-31 14:41:55 +02001115 if (s->next_admin & mode)
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001116 return;
1117
Emeric Brun52a91d32017-08-31 14:41:55 +02001118 s->next_admin |= mode;
Emeric Brun64cc49c2017-10-03 14:46:45 +02001119 if (cause)
1120 strlcpy2(s->adm_st_chg_cause, cause, sizeof(s->adm_st_chg_cause));
1121
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001122 /* propagate changes */
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001123 srv_update_status(s);
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001124
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001125 /* stop going down if the equivalent flag was already present (forced or inherited) */
Emeric Brun52a91d32017-08-31 14:41:55 +02001126 if (((mode & SRV_ADMF_MAINT) && (s->next_admin & ~mode & SRV_ADMF_MAINT)) ||
1127 ((mode & SRV_ADMF_DRAIN) && (s->next_admin & ~mode & SRV_ADMF_DRAIN)))
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001128 return;
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001129
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001130 /* compute the inherited flag to propagate */
1131 if (mode & SRV_ADMF_MAINT)
1132 mode = SRV_ADMF_IMAINT;
1133 else if (mode & SRV_ADMF_DRAIN)
1134 mode = SRV_ADMF_IDRAIN;
1135
Emeric Brun9f0b4582017-10-23 14:39:51 +02001136 for (srv = s->trackers; srv; srv = srv->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001137 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Willy Tarreau8b428482016-11-07 15:53:43 +01001138 srv_set_admin_flag(srv, mode, cause);
Christopher Faulet8d01fd62018-01-24 21:49:41 +01001139 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02001140 }
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001141}
1142
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001143/* Disables admin flag <mode> (among SRV_ADMF_*) on server <s>. This is used to
1144 * stop enforcing either maint mode or drain mode. It is not allowed to set more
1145 * than one flag at once. The equivalent "inherited" flag is propagated to all
1146 * tracking servers. Leaving maintenance mode re-enables health checks. When
1147 * either the flag is already cleared or no flag is passed, nothing is done.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001148 *
1149 * Must be called with the server lock held.
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001150 */
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001151void srv_clr_admin_flag(struct server *s, enum srv_admin mode)
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001152{
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001153 struct server *srv;
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001154
1155 if (!mode)
1156 return;
1157
1158 /* stop going down as soon as we see the flag is not there anymore */
Emeric Brun52a91d32017-08-31 14:41:55 +02001159 if (!(s->next_admin & mode))
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001160 return;
1161
Emeric Brun52a91d32017-08-31 14:41:55 +02001162 s->next_admin &= ~mode;
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001163
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001164 /* propagate changes */
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001165 srv_update_status(s);
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001166
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001167 /* stop going down if the equivalent flag is still present (forced or inherited) */
Emeric Brun52a91d32017-08-31 14:41:55 +02001168 if (((mode & SRV_ADMF_MAINT) && (s->next_admin & SRV_ADMF_MAINT)) ||
1169 ((mode & SRV_ADMF_DRAIN) && (s->next_admin & SRV_ADMF_DRAIN)))
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001170 return;
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001171
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001172 if (mode & SRV_ADMF_MAINT)
1173 mode = SRV_ADMF_IMAINT;
1174 else if (mode & SRV_ADMF_DRAIN)
1175 mode = SRV_ADMF_IDRAIN;
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001176
Emeric Brun9f0b4582017-10-23 14:39:51 +02001177 for (srv = s->trackers; srv; srv = srv->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001178 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001179 srv_clr_admin_flag(srv, mode);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001180 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02001181 }
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001182}
1183
Willy Tarreau757478e2016-11-03 19:22:19 +01001184/* principle: propagate maint and drain to tracking servers. This is useful
1185 * upon startup so that inherited states are correct.
1186 */
1187static void srv_propagate_admin_state(struct server *srv)
1188{
1189 struct server *srv2;
1190
1191 if (!srv->trackers)
1192 return;
1193
1194 for (srv2 = srv->trackers; srv2; srv2 = srv2->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001195 HA_SPIN_LOCK(SERVER_LOCK, &srv2->lock);
Emeric Brun52a91d32017-08-31 14:41:55 +02001196 if (srv->next_admin & (SRV_ADMF_MAINT | SRV_ADMF_CMAINT))
Willy Tarreau8b428482016-11-07 15:53:43 +01001197 srv_set_admin_flag(srv2, SRV_ADMF_IMAINT, NULL);
Willy Tarreau757478e2016-11-03 19:22:19 +01001198
Emeric Brun52a91d32017-08-31 14:41:55 +02001199 if (srv->next_admin & SRV_ADMF_DRAIN)
Willy Tarreau8b428482016-11-07 15:53:43 +01001200 srv_set_admin_flag(srv2, SRV_ADMF_IDRAIN, NULL);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001201 HA_SPIN_UNLOCK(SERVER_LOCK, &srv2->lock);
Willy Tarreau757478e2016-11-03 19:22:19 +01001202 }
1203}
1204
1205/* Compute and propagate the admin states for all servers in proxy <px>.
1206 * Only servers *not* tracking another one are considered, because other
1207 * ones will be handled when the server they track is visited.
1208 */
1209void srv_compute_all_admin_states(struct proxy *px)
1210{
1211 struct server *srv;
1212
1213 for (srv = px->srv; srv; srv = srv->next) {
1214 if (srv->track)
1215 continue;
1216 srv_propagate_admin_state(srv);
1217 }
1218}
1219
Willy Tarreaudff55432012-10-10 17:51:05 +02001220/* Note: must not be declared <const> as its list will be overwritten.
1221 * Please take care of keeping this list alphabetically sorted, doing so helps
1222 * all code contributors.
1223 * Optional keywords are also declared with a NULL ->parse() function so that
1224 * the config parser can report an appropriate error when a known keyword was
1225 * not enabled.
Frédéric Lécailledfacd692017-04-16 17:14:14 +02001226 * Note: -1 as ->skip value means that the number of arguments are variable.
Willy Tarreaudff55432012-10-10 17:51:05 +02001227 */
1228static struct srv_kw_list srv_kws = { "ALL", { }, {
Frédéric Lécaille1502cfd2017-03-10 15:36:14 +01001229 { "backup", srv_parse_backup, 0, 1 }, /* Flag as backup server */
Frédéric Lécaille9d1b95b2017-03-15 09:13:33 +01001230 { "cookie", srv_parse_cookie, 1, 1 }, /* Assign a cookie to the server */
Frédéric Lécaille2a0d0612017-03-21 11:53:54 +01001231 { "disabled", srv_parse_disabled, 0, 1 }, /* Start the server in 'disabled' state */
1232 { "enabled", srv_parse_enabled, 0, 1 }, /* Start the server in 'enabled' state */
Frédéric Lécaille1502cfd2017-03-10 15:36:14 +01001233 { "id", srv_parse_id, 1, 0 }, /* set id# of server */
Willy Tarreau9c538e02019-01-23 10:21:49 +01001234 { "max-reuse", srv_parse_max_reuse, 1, 1 }, /* Set the max number of requests on a connection, -1 means unlimited */
Frédéric Lécaille22f41a22017-03-16 17:17:36 +01001235 { "namespace", srv_parse_namespace, 1, 1 }, /* Namespace the server socket belongs to (if supported) */
Frédéric Lécaille1502cfd2017-03-10 15:36:14 +01001236 { "no-backup", srv_parse_no_backup, 0, 1 }, /* Flag as non-backup server */
Frédéric Lécaille31045e42017-03-10 16:40:00 +01001237 { "no-send-proxy", srv_parse_no_send_proxy, 0, 1 }, /* Disable use of PROXY V1 protocol */
1238 { "no-send-proxy-v2", srv_parse_no_send_proxy_v2, 0, 1 }, /* Disable use of PROXY V2 protocol */
Frédéric Lécaille1b9423d2019-07-04 14:19:06 +02001239 { "no-tfo", srv_parse_no_tfo, 0, 1 }, /* Disable use of TCP Fast Open */
Frédéric Lécaillef9bc1d62017-03-10 15:50:49 +01001240 { "non-stick", srv_parse_non_stick, 0, 1 }, /* Disable stick-table persistence */
Frédéric Lécaille547356e2017-03-15 08:55:39 +01001241 { "observe", srv_parse_observe, 1, 1 }, /* Enables health adjusting based on observing communication with the server */
Willy Tarreau2f3f4d32020-07-01 07:43:51 +02001242 { "pool-low-conn", srv_parse_pool_low_conn, 1, 1 }, /* Set the min number of orphan idle connecbefore being allowed to pick from other threads */
Olivier Houchard006e3102018-12-10 18:30:32 +01001243 { "pool-max-conn", srv_parse_pool_max_conn, 1, 1 }, /* Set the max number of orphan idle connections, 0 means unlimited */
Olivier Houchardb7b3faa2018-12-14 18:15:36 +01001244 { "pool-purge-delay", srv_parse_pool_purge_delay, 1, 1 }, /* Set the time before we destroy orphan idle connections, defaults to 1s */
Christopher Faulet8ed0a3e2018-04-10 14:45:45 +02001245 { "proto", srv_parse_proto, 1, 1 }, /* Set the proto to use for all outgoing connections */
Emmanuel Hocdetf643b802018-02-01 15:20:32 +01001246 { "proxy-v2-options", srv_parse_proxy_v2_options, 1, 1 }, /* options for send-proxy-v2 */
Frédéric Lécaille16186232017-03-14 16:42:49 +01001247 { "redir", srv_parse_redir, 1, 1 }, /* Enable redirection mode */
Frédéric Lécaille31045e42017-03-10 16:40:00 +01001248 { "send-proxy", srv_parse_send_proxy, 0, 1 }, /* Enforce use of PROXY V1 protocol */
1249 { "send-proxy-v2", srv_parse_send_proxy_v2, 0, 1 }, /* Enforce use of PROXY V2 protocol */
Frédéric Lécailledfacd692017-04-16 17:14:14 +02001250 { "source", srv_parse_source, -1, 1 }, /* Set the source address to be used to connect to the server */
Frédéric Lécaillef9bc1d62017-03-10 15:50:49 +01001251 { "stick", srv_parse_stick, 0, 1 }, /* Enable stick-table persistence */
Olivier Houchard8d82db72019-07-04 13:34:10 +02001252 { "tfo", srv_parse_tfo, 0, 1 }, /* enable TCP Fast Open of server */
Frédéric Lécaille67e0e612017-03-14 15:21:31 +01001253 { "track", srv_parse_track, 1, 1 }, /* Set the current state of the server, tracking another one */
Alexander Liu2a54bb72019-05-22 19:44:48 +08001254 { "socks4", srv_parse_socks4, 1, 1 }, /* Set the socks4 proxy of the server*/
Willy Tarreaudff55432012-10-10 17:51:05 +02001255 { NULL, NULL, 0 },
1256}};
1257
Willy Tarreau0108d902018-11-25 19:14:37 +01001258INITCALL1(STG_REGISTER, srv_register_keywords, &srv_kws);
Willy Tarreaudff55432012-10-10 17:51:05 +02001259
Willy Tarreau004e0452013-11-21 11:22:01 +01001260/* Recomputes the server's eweight based on its state, uweight, the current time,
Ilya Shipitsinc02a23f2020-05-06 00:53:22 +05001261 * and the proxy's algorithm. To be used after updating sv->uweight. The warmup
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001262 * state is automatically disabled if the time is elapsed. If <must_update> is
1263 * not zero, the update will be propagated immediately.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001264 *
1265 * Must be called with the server lock held.
Willy Tarreau004e0452013-11-21 11:22:01 +01001266 */
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001267void server_recalc_eweight(struct server *sv, int must_update)
Willy Tarreau004e0452013-11-21 11:22:01 +01001268{
1269 struct proxy *px = sv->proxy;
1270 unsigned w;
1271
1272 if (now.tv_sec < sv->last_change || now.tv_sec >= sv->last_change + sv->slowstart) {
1273 /* go to full throttle if the slowstart interval is reached */
Emeric Brun52a91d32017-08-31 14:41:55 +02001274 if (sv->next_state == SRV_ST_STARTING)
1275 sv->next_state = SRV_ST_RUNNING;
Willy Tarreau004e0452013-11-21 11:22:01 +01001276 }
1277
1278 /* We must take care of not pushing the server to full throttle during slow starts.
1279 * It must also start immediately, at least at the minimal step when leaving maintenance.
1280 */
Emeric Brun52a91d32017-08-31 14:41:55 +02001281 if ((sv->next_state == SRV_ST_STARTING) && (px->lbprm.algo & BE_LB_PROP_DYN))
Willy Tarreau004e0452013-11-21 11:22:01 +01001282 w = (px->lbprm.wdiv * (now.tv_sec - sv->last_change) + sv->slowstart) / sv->slowstart;
1283 else
1284 w = px->lbprm.wdiv;
1285
Emeric Brun52a91d32017-08-31 14:41:55 +02001286 sv->next_eweight = (sv->uweight * w + px->lbprm.wmult - 1) / px->lbprm.wmult;
Willy Tarreau004e0452013-11-21 11:22:01 +01001287
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001288 /* propagate changes only if needed (i.e. not recursively) */
Willy Tarreau49725a02018-08-21 19:54:09 +02001289 if (must_update)
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001290 srv_update_status(sv);
Willy Tarreau004e0452013-11-21 11:22:01 +01001291}
1292
Willy Tarreaubaaee002006-06-26 02:48:02 +02001293/*
Simon Horman7d09b9a2013-02-12 10:45:51 +09001294 * Parses weight_str and configures sv accordingly.
1295 * Returns NULL on success, error message string otherwise.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001296 *
1297 * Must be called with the server lock held.
Simon Horman7d09b9a2013-02-12 10:45:51 +09001298 */
1299const char *server_parse_weight_change_request(struct server *sv,
1300 const char *weight_str)
1301{
1302 struct proxy *px;
Simon Hormanb796afa2013-02-12 10:45:53 +09001303 long int w;
1304 char *end;
Simon Horman7d09b9a2013-02-12 10:45:51 +09001305
1306 px = sv->proxy;
1307
1308 /* if the weight is terminated with '%', it is set relative to
1309 * the initial weight, otherwise it is absolute.
1310 */
1311 if (!*weight_str)
1312 return "Require <weight> or <weight%>.\n";
1313
Simon Hormanb796afa2013-02-12 10:45:53 +09001314 w = strtol(weight_str, &end, 10);
1315 if (end == weight_str)
1316 return "Empty weight string empty or preceded by garbage";
1317 else if (end[0] == '%' && end[1] == '\0') {
Simon Horman58b5d292013-02-12 10:45:52 +09001318 if (w < 0)
Simon Horman7d09b9a2013-02-12 10:45:51 +09001319 return "Relative weight must be positive.\n";
Simon Horman58b5d292013-02-12 10:45:52 +09001320 /* Avoid integer overflow */
1321 if (w > 25600)
1322 w = 25600;
Simon Horman7d09b9a2013-02-12 10:45:51 +09001323 w = sv->iweight * w / 100;
Simon Horman58b5d292013-02-12 10:45:52 +09001324 if (w > 256)
1325 w = 256;
Simon Horman7d09b9a2013-02-12 10:45:51 +09001326 }
1327 else if (w < 0 || w > 256)
1328 return "Absolute weight can only be between 0 and 256 inclusive.\n";
Simon Hormanb796afa2013-02-12 10:45:53 +09001329 else if (end[0] != '\0')
1330 return "Trailing garbage in weight string";
Simon Horman7d09b9a2013-02-12 10:45:51 +09001331
1332 if (w && w != sv->iweight && !(px->lbprm.algo & BE_LB_PROP_DYN))
1333 return "Backend is using a static LB algorithm and only accepts weights '0%' and '100%'.\n";
1334
1335 sv->uweight = w;
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001336 server_recalc_eweight(sv, 1);
Simon Horman7d09b9a2013-02-12 10:45:51 +09001337
1338 return NULL;
1339}
1340
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001341/*
Thierry Fournier09a91782016-02-24 08:25:39 +01001342 * Parses <addr_str> and configures <sv> accordingly. <from> precise
1343 * the source of the change in the associated message log.
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001344 * Returns:
1345 * - error string on error
1346 * - NULL on success
Willy Tarreau46b7f532018-08-21 11:54:26 +02001347 *
1348 * Must be called with the server lock held.
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001349 */
1350const char *server_parse_addr_change_request(struct server *sv,
Thierry Fournier09a91782016-02-24 08:25:39 +01001351 const char *addr_str, const char *updater)
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001352{
1353 unsigned char ip[INET6_ADDRSTRLEN];
1354
1355 if (inet_pton(AF_INET6, addr_str, ip)) {
Thierry Fournier09a91782016-02-24 08:25:39 +01001356 update_server_addr(sv, ip, AF_INET6, updater);
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001357 return NULL;
1358 }
1359 if (inet_pton(AF_INET, addr_str, ip)) {
Thierry Fournier09a91782016-02-24 08:25:39 +01001360 update_server_addr(sv, ip, AF_INET, updater);
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001361 return NULL;
1362 }
1363
1364 return "Could not understand IP address format.\n";
1365}
1366
Willy Tarreau46b7f532018-08-21 11:54:26 +02001367/*
1368 * Must be called with the server lock held.
1369 */
Nenad Merdanovic174dd372016-04-24 23:10:06 +02001370const char *server_parse_maxconn_change_request(struct server *sv,
1371 const char *maxconn_str)
1372{
1373 long int v;
1374 char *end;
1375
1376 if (!*maxconn_str)
1377 return "Require <maxconn>.\n";
1378
1379 v = strtol(maxconn_str, &end, 10);
1380 if (end == maxconn_str)
1381 return "maxconn string empty or preceded by garbage";
1382 else if (end[0] != '\0')
1383 return "Trailing garbage in maxconn string";
1384
Amaury Denoyelleac458452021-05-17 10:47:18 +02001385 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Nenad Merdanovic174dd372016-04-24 23:10:06 +02001386 if (sv->maxconn == sv->minconn) { // static maxconn
1387 sv->maxconn = sv->minconn = v;
1388 } else { // dynamic maxconn
1389 sv->maxconn = v;
1390 }
Amaury Denoyelleac458452021-05-17 10:47:18 +02001391 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Nenad Merdanovic174dd372016-04-24 23:10:06 +02001392
1393 if (may_dequeue_tasks(sv, sv->proxy))
1394 process_srv_queue(sv);
1395
1396 return NULL;
1397}
1398
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001399#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001400static struct sample_expr *srv_sni_sample_parse_expr(struct server *srv, struct proxy *px,
1401 const char *file, int linenum, char **err)
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001402{
1403 int idx;
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001404 const char *args[] = {
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001405 srv->sni_expr,
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001406 NULL,
1407 };
1408
1409 idx = 0;
Olivier Houchard7d8e6882017-04-20 18:21:17 +02001410 px->conf.args.ctx = ARGC_SRV;
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001411
Willy Tarreaue3b57bf2020-02-14 16:50:14 +01001412 return sample_parse_expr((char **)args, &idx, file, linenum, err, &px->conf.args, NULL);
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001413}
1414
1415static int server_parse_sni_expr(struct server *newsrv, struct proxy *px, char **err)
1416{
1417 struct sample_expr *expr;
1418
1419 expr = srv_sni_sample_parse_expr(newsrv, px, px->conf.file, px->conf.line, err);
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001420 if (!expr) {
1421 memprintf(err, "error detected while parsing sni expression : %s", *err);
1422 return ERR_ALERT | ERR_FATAL;
1423 }
1424
1425 if (!(expr->fetch->val & SMP_VAL_BE_SRV_CON)) {
1426 memprintf(err, "error detected while parsing sni expression : "
1427 " fetch method '%s' extracts information from '%s', "
1428 "none of which is available here.\n",
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001429 newsrv->sni_expr, sample_src_names(expr->fetch->use));
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001430 return ERR_ALERT | ERR_FATAL;
1431 }
1432
1433 px->http_needed |= !!(expr->fetch->use & SMP_USE_HTTP_ANY);
1434 release_sample_expr(newsrv->ssl_ctx.sni);
1435 newsrv->ssl_ctx.sni = expr;
1436
1437 return 0;
1438}
1439#endif
1440
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001441static void display_parser_err(const char *file, int linenum, char **args, int cur_arg, int err_code, char **err)
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001442{
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001443 char *msg = "error encountered while processing ";
1444 char *quote = "'";
1445 char *token = args[cur_arg];
1446
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001447 if (err && *err) {
1448 indent_msg(err, 2);
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001449 msg = *err;
1450 quote = "";
1451 token = "";
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001452 }
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001453
1454 if (err_code & ERR_WARN && !(err_code & ERR_ALERT))
1455 ha_warning("parsing [%s:%d] : '%s %s' : %s%s%s%s.\n",
1456 file, linenum, args[0], args[1],
1457 msg, quote, token, quote);
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001458 else
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001459 ha_alert("parsing [%s:%d] : '%s %s' : %s%s%s%s.\n",
1460 file, linenum, args[0], args[1],
1461 msg, quote, token, quote);
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001462}
1463
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001464static void srv_conn_src_sport_range_cpy(struct server *srv,
1465 struct server *src)
1466{
1467 int range_sz;
1468
1469 range_sz = src->conn_src.sport_range->size;
1470 if (range_sz > 0) {
1471 srv->conn_src.sport_range = port_range_alloc_range(range_sz);
1472 if (srv->conn_src.sport_range != NULL) {
1473 int i;
1474
1475 for (i = 0; i < range_sz; i++) {
1476 srv->conn_src.sport_range->ports[i] =
1477 src->conn_src.sport_range->ports[i];
1478 }
1479 }
1480 }
1481}
1482
1483/*
1484 * Copy <src> server connection source settings to <srv> server everything needed.
1485 */
1486static void srv_conn_src_cpy(struct server *srv, struct server *src)
1487{
1488 srv->conn_src.opts = src->conn_src.opts;
1489 srv->conn_src.source_addr = src->conn_src.source_addr;
1490
1491 /* Source port range copy. */
1492 if (src->conn_src.sport_range != NULL)
1493 srv_conn_src_sport_range_cpy(srv, src);
1494
1495#ifdef CONFIG_HAP_TRANSPARENT
1496 if (src->conn_src.bind_hdr_name != NULL) {
1497 srv->conn_src.bind_hdr_name = strdup(src->conn_src.bind_hdr_name);
1498 srv->conn_src.bind_hdr_len = strlen(src->conn_src.bind_hdr_name);
1499 }
1500 srv->conn_src.bind_hdr_occ = src->conn_src.bind_hdr_occ;
1501 srv->conn_src.tproxy_addr = src->conn_src.tproxy_addr;
1502#endif
1503 if (src->conn_src.iface_name != NULL)
1504 srv->conn_src.iface_name = strdup(src->conn_src.iface_name);
1505}
1506
1507/*
1508 * Copy <src> server SSL settings to <srv> server allocating
1509 * everything needed.
1510 */
1511#if defined(USE_OPENSSL)
1512static void srv_ssl_settings_cpy(struct server *srv, struct server *src)
1513{
1514 if (src->ssl_ctx.ca_file != NULL)
1515 srv->ssl_ctx.ca_file = strdup(src->ssl_ctx.ca_file);
1516 if (src->ssl_ctx.crl_file != NULL)
1517 srv->ssl_ctx.crl_file = strdup(src->ssl_ctx.crl_file);
1518 if (src->ssl_ctx.client_crt != NULL)
1519 srv->ssl_ctx.client_crt = strdup(src->ssl_ctx.client_crt);
1520
1521 srv->ssl_ctx.verify = src->ssl_ctx.verify;
1522
1523 if (src->ssl_ctx.verify_host != NULL)
1524 srv->ssl_ctx.verify_host = strdup(src->ssl_ctx.verify_host);
1525 if (src->ssl_ctx.ciphers != NULL)
1526 srv->ssl_ctx.ciphers = strdup(src->ssl_ctx.ciphers);
Jerome Magnin2e8d52f2020-04-22 11:40:18 +02001527 if (src->ssl_ctx.options)
1528 srv->ssl_ctx.options = src->ssl_ctx.options;
1529 if (src->ssl_ctx.methods.flags)
1530 srv->ssl_ctx.methods.flags = src->ssl_ctx.methods.flags;
1531 if (src->ssl_ctx.methods.min)
1532 srv->ssl_ctx.methods.min = src->ssl_ctx.methods.min;
1533 if (src->ssl_ctx.methods.max)
1534 srv->ssl_ctx.methods.max = src->ssl_ctx.methods.max;
1535
Willy Tarreau5db847a2019-05-09 14:13:35 +02001536#if (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L && !defined OPENSSL_IS_BORINGSSL)
Dirkjan Bussink415150f2018-09-14 11:14:21 +02001537 if (src->ssl_ctx.ciphersuites != NULL)
1538 srv->ssl_ctx.ciphersuites = strdup(src->ssl_ctx.ciphersuites);
1539#endif
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001540 if (src->sni_expr != NULL)
1541 srv->sni_expr = strdup(src->sni_expr);
Olivier Houchardc7566002018-11-20 23:33:50 +01001542
1543#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
1544 if (src->ssl_ctx.alpn_str) {
1545 srv->ssl_ctx.alpn_str = malloc(src->ssl_ctx.alpn_len);
1546 if (srv->ssl_ctx.alpn_str) {
1547 memcpy(srv->ssl_ctx.alpn_str, src->ssl_ctx.alpn_str,
1548 src->ssl_ctx.alpn_len);
1549 srv->ssl_ctx.alpn_len = src->ssl_ctx.alpn_len;
1550 }
1551 }
1552#endif
1553#ifdef OPENSSL_NPN_NEGOTIATED
1554 if (src->ssl_ctx.npn_str) {
1555 srv->ssl_ctx.npn_str = malloc(src->ssl_ctx.npn_len);
1556 if (srv->ssl_ctx.npn_str) {
1557 memcpy(srv->ssl_ctx.npn_str, src->ssl_ctx.npn_str,
1558 src->ssl_ctx.npn_len);
1559 srv->ssl_ctx.npn_len = src->ssl_ctx.npn_len;
1560 }
1561 }
1562#endif
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001563}
1564#endif
1565
1566/*
Baptiste Assmann201c07f2017-05-22 15:17:15 +02001567 * Prepare <srv> for hostname resolution.
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001568 * May be safely called with a default server as <src> argument (without hostname).
Frédéric Lécailleb418c122017-04-26 11:24:02 +02001569 * Returns -1 in case of any allocation failure, 0 if not.
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001570 */
Baptiste Assmann201c07f2017-05-22 15:17:15 +02001571static int srv_prepare_for_resolution(struct server *srv, const char *hostname)
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001572{
Christopher Faulet67957bd2017-09-27 11:00:59 +02001573 char *hostname_dn;
1574 int hostname_len, hostname_dn_len;
1575
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001576 if (!hostname)
Frédéric Lécailleb418c122017-04-26 11:24:02 +02001577 return 0;
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001578
Christopher Faulet67957bd2017-09-27 11:00:59 +02001579 hostname_len = strlen(hostname);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001580 hostname_dn = trash.area;
Christopher Faulet67957bd2017-09-27 11:00:59 +02001581 hostname_dn_len = dns_str_to_dn_label(hostname, hostname_len + 1,
1582 hostname_dn, trash.size);
1583 if (hostname_dn_len == -1)
1584 goto err;
Baptiste Assmann81ed1a02017-05-03 10:11:44 +02001585
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001586
Christopher Faulet67957bd2017-09-27 11:00:59 +02001587 free(srv->hostname);
1588 free(srv->hostname_dn);
1589 srv->hostname = strdup(hostname);
1590 srv->hostname_dn = strdup(hostname_dn);
1591 srv->hostname_dn_len = hostname_dn_len;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02001592 if (!srv->hostname || !srv->hostname_dn)
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001593 goto err;
1594
Frédéric Lécailleb418c122017-04-26 11:24:02 +02001595 return 0;
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001596
1597 err:
Christopher Faulet67957bd2017-09-27 11:00:59 +02001598 free(srv->hostname); srv->hostname = NULL;
1599 free(srv->hostname_dn); srv->hostname_dn = NULL;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02001600 return -1;
1601}
1602
Baptiste Assmann201c07f2017-05-22 15:17:15 +02001603/*
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001604 * Copy <src> server settings to <srv> server allocating
1605 * everything needed.
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001606 * This function is not supposed to be called at any time, but only
1607 * during server settings parsing or during server allocations from
1608 * a server template, and just after having calloc()'ed a new server.
1609 * So, <src> may only be a default server (when parsing server settings)
1610 * or a server template (during server allocations from a server template).
1611 * <srv_tmpl> distinguishes these two cases (must be 1 if <srv> is a template,
1612 * 0 if not).
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001613 */
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001614static void srv_settings_cpy(struct server *srv, struct server *src, int srv_tmpl)
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001615{
1616 /* Connection source settings copy */
1617 srv_conn_src_cpy(srv, src);
1618
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001619 if (srv_tmpl) {
1620 srv->addr = src->addr;
1621 srv->svc_port = src->svc_port;
1622 }
1623
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001624 srv->pp_opts = src->pp_opts;
1625 if (src->rdr_pfx != NULL) {
1626 srv->rdr_pfx = strdup(src->rdr_pfx);
1627 srv->rdr_len = src->rdr_len;
1628 }
1629 if (src->cookie != NULL) {
1630 srv->cookie = strdup(src->cookie);
1631 srv->cklen = src->cklen;
1632 }
1633 srv->use_ssl = src->use_ssl;
Willy Tarreau24441082019-12-11 15:43:45 +01001634 srv->check.addr = src->check.addr;
1635 srv->agent.addr = src->agent.addr;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001636 srv->check.use_ssl = src->check.use_ssl;
1637 srv->check.port = src->check.port;
Olivier Houchard21944012018-12-21 19:42:01 +01001638 srv->check.sni = src->check.sni;
Olivier Houchard92150142018-12-21 19:47:01 +01001639 srv->check.alpn_str = src->check.alpn_str;
Ilya Shipitsin0c50b1e2019-04-30 21:21:28 +05001640 srv->check.alpn_len = src->check.alpn_len;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001641 /* Note: 'flags' field has potentially been already initialized. */
1642 srv->flags |= src->flags;
1643 srv->do_check = src->do_check;
1644 srv->do_agent = src->do_agent;
1645 if (srv->check.port)
1646 srv->flags |= SRV_F_CHECKPORT;
1647 srv->check.inter = src->check.inter;
1648 srv->check.fastinter = src->check.fastinter;
1649 srv->check.downinter = src->check.downinter;
1650 srv->agent.use_ssl = src->agent.use_ssl;
1651 srv->agent.port = src->agent.port;
Christopher Faulet0ae3d1d2020-04-06 17:54:24 +02001652
1653 if (src->agent.tcpcheck_rules) {
1654 srv->agent.tcpcheck_rules = calloc(1, sizeof(*srv->agent.tcpcheck_rules));
1655 if (srv->agent.tcpcheck_rules) {
1656 srv->agent.tcpcheck_rules->flags = src->agent.tcpcheck_rules->flags;
1657 srv->agent.tcpcheck_rules->list = src->agent.tcpcheck_rules->list;
1658 LIST_INIT(&srv->agent.tcpcheck_rules->preset_vars);
1659 dup_tcpcheck_vars(&srv->agent.tcpcheck_rules->preset_vars,
1660 &src->agent.tcpcheck_rules->preset_vars);
1661 }
1662 }
1663
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001664 srv->agent.inter = src->agent.inter;
1665 srv->agent.fastinter = src->agent.fastinter;
1666 srv->agent.downinter = src->agent.downinter;
1667 srv->maxqueue = src->maxqueue;
1668 srv->minconn = src->minconn;
1669 srv->maxconn = src->maxconn;
1670 srv->slowstart = src->slowstart;
1671 srv->observe = src->observe;
1672 srv->onerror = src->onerror;
1673 srv->onmarkeddown = src->onmarkeddown;
1674 srv->onmarkedup = src->onmarkedup;
1675 if (src->trackit != NULL)
1676 srv->trackit = strdup(src->trackit);
1677 srv->consecutive_errors_limit = src->consecutive_errors_limit;
1678 srv->uweight = srv->iweight = src->iweight;
1679
1680 srv->check.send_proxy = src->check.send_proxy;
1681 /* health: up, but will fall down at first failure */
1682 srv->check.rise = srv->check.health = src->check.rise;
1683 srv->check.fall = src->check.fall;
1684
1685 /* Here we check if 'disabled' is the default server state */
Emeric Brun52a91d32017-08-31 14:41:55 +02001686 if (src->next_admin & (SRV_ADMF_CMAINT | SRV_ADMF_FMAINT)) {
1687 srv->next_admin |= SRV_ADMF_CMAINT | SRV_ADMF_FMAINT;
1688 srv->next_state = SRV_ST_STOPPED;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001689 srv->check.state |= CHK_ST_PAUSED;
1690 srv->check.health = 0;
1691 }
1692
1693 /* health: up but will fall down at first failure */
1694 srv->agent.rise = srv->agent.health = src->agent.rise;
1695 srv->agent.fall = src->agent.fall;
1696
1697 if (src->resolvers_id != NULL)
1698 srv->resolvers_id = strdup(src->resolvers_id);
1699 srv->dns_opts.family_prio = src->dns_opts.family_prio;
Baptiste Assmann8e2d9432018-06-22 15:04:43 +02001700 srv->dns_opts.accept_duplicate_ip = src->dns_opts.accept_duplicate_ip;
Daniel Corbettf8716912019-11-17 09:48:56 -05001701 srv->dns_opts.ignore_weight = src->dns_opts.ignore_weight;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001702 if (srv->dns_opts.family_prio == AF_UNSPEC)
1703 srv->dns_opts.family_prio = AF_INET6;
1704 memcpy(srv->dns_opts.pref_net,
1705 src->dns_opts.pref_net,
1706 sizeof srv->dns_opts.pref_net);
1707 srv->dns_opts.pref_net_nb = src->dns_opts.pref_net_nb;
1708
1709 srv->init_addr_methods = src->init_addr_methods;
1710 srv->init_addr = src->init_addr;
1711#if defined(USE_OPENSSL)
1712 srv_ssl_settings_cpy(srv, src);
1713#endif
1714#ifdef TCP_USER_TIMEOUT
1715 srv->tcp_ut = src->tcp_ut;
1716#endif
Christopher Faulet8ed0a3e2018-04-10 14:45:45 +02001717 srv->mux_proto = src->mux_proto;
Olivier Houchardb7b3faa2018-12-14 18:15:36 +01001718 srv->pool_purge_delay = src->pool_purge_delay;
Willy Tarreau2f3f4d32020-07-01 07:43:51 +02001719 srv->low_idle_conns = src->low_idle_conns;
Olivier Houchard006e3102018-12-10 18:30:32 +01001720 srv->max_idle_conns = src->max_idle_conns;
Willy Tarreau9c538e02019-01-23 10:21:49 +01001721 srv->max_reuse = src->max_reuse;
Christopher Faulet8ed0a3e2018-04-10 14:45:45 +02001722
Olivier Houchard8da5f982017-08-04 18:35:36 +02001723 if (srv_tmpl)
1724 srv->srvrq = src->srvrq;
Alexander Liu2a54bb72019-05-22 19:44:48 +08001725
1726 srv->check.via_socks4 = src->check.via_socks4;
1727 srv->socks4_addr = src->socks4_addr;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001728}
1729
William Lallemand313bfd12018-10-26 14:47:32 +02001730struct server *new_server(struct proxy *proxy)
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001731{
1732 struct server *srv;
Willy Tarreau72653c52021-03-04 10:47:54 +01001733 int i;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001734
1735 srv = calloc(1, sizeof *srv);
1736 if (!srv)
1737 return NULL;
1738
1739 srv->obj_type = OBJ_TYPE_SERVER;
1740 srv->proxy = proxy;
Willy Tarreau72653c52021-03-04 10:47:54 +01001741 for (i = 0; i < MAX_THREADS; i++)
1742 MT_LIST_INIT(&srv->actconns[i]);
Patrick Hemmer0355dab2018-05-11 12:52:31 -04001743 srv->pendconns = EB_ROOT;
Emeric Brun32131d42021-06-11 10:48:45 +02001744 LIST_INIT(&srv->srv_rec_item);
Emeric Brunca8e3552021-06-11 10:08:05 +02001745 LIST_INIT(&srv->ip_rec_item);
Christopher Faulet40a007c2017-07-03 15:41:01 +02001746
Emeric Brun52a91d32017-08-31 14:41:55 +02001747 srv->next_state = SRV_ST_RUNNING; /* early server setup */
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001748 srv->last_change = now.tv_sec;
1749
Christopher Faulet38290462020-04-21 11:46:40 +02001750 srv->check.obj_type = OBJ_TYPE_CHECK;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001751 srv->check.status = HCHK_STATUS_INI;
1752 srv->check.server = srv;
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01001753 srv->check.proxy = proxy;
Christopher Faulet5d503fc2020-03-30 20:34:34 +02001754 srv->check.tcpcheck_rules = &proxy->tcpcheck_rules;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001755
Christopher Faulet38290462020-04-21 11:46:40 +02001756 srv->agent.obj_type = OBJ_TYPE_CHECK;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001757 srv->agent.status = HCHK_STATUS_INI;
1758 srv->agent.server = srv;
Willy Tarreau1ba32032019-01-21 07:48:26 +01001759 srv->agent.proxy = proxy;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001760 srv->xprt = srv->check.xprt = srv->agent.xprt = xprt_get(XPRT_RAW);
1761
Willy Tarreau975b1552019-06-06 16:25:55 +02001762 /* please don't put default server settings here, they are set in
1763 * init_default_instance().
1764 */
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001765 return srv;
1766}
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001767
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001768#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
1769static int server_sni_expr_init(const char *file, int linenum, char **args, int cur_arg,
1770 struct server *srv, struct proxy *proxy)
1771{
1772 int ret;
1773 char *err = NULL;
1774
1775 if (!srv->sni_expr)
1776 return 0;
1777
1778 ret = server_parse_sni_expr(srv, proxy, &err);
1779 if (!ret)
1780 return 0;
1781
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001782 display_parser_err(file, linenum, args, cur_arg, ret, &err);
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001783 free(err);
1784
1785 return ret;
1786}
1787#endif
1788
1789/*
1790 * Server initializations finalization.
1791 * Initialize health check, agent check and SNI expression if enabled.
1792 * Must not be called for a default server instance.
1793 */
1794static int server_finalize_init(const char *file, int linenum, char **args, int cur_arg,
1795 struct server *srv, struct proxy *px)
1796{
Christopher Fauletb3b53522020-04-27 11:17:10 +02001797#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001798 int ret;
Christopher Fauletb3b53522020-04-27 11:17:10 +02001799#endif
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001800
Christopher Faulet8892e5d2020-03-26 19:48:20 +01001801 if (srv->do_check && srv->trackit) {
1802 ha_alert("parsing [%s:%d]: unable to enable checks and tracking at the same time!\n",
1803 file, linenum);
1804 return ERR_ALERT | ERR_FATAL;
1805 }
1806
1807 if (srv->do_agent && !srv->agent.port) {
1808 ha_alert("parsing [%s:%d] : server %s does not have agent port. Agent check has been disabled.\n",
1809 file, linenum, srv->id);
1810 return ERR_ALERT | ERR_FATAL;
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001811 }
1812
1813#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
1814 if ((ret = server_sni_expr_init(file, linenum, args, cur_arg, srv, px)) != 0)
1815 return ret;
1816#endif
1817
1818 if (srv->flags & SRV_F_BACKUP)
1819 px->srv_bck++;
1820 else
1821 px->srv_act++;
1822 srv_lb_commit_status(srv);
1823
1824 return 0;
1825}
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001826
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001827/*
1828 * Parse as much as possible such a range string argument: low[-high]
1829 * Set <nb_low> and <nb_high> values so that they may be reused by this loop
1830 * for(int i = nb_low; i <= nb_high; i++)... with nb_low >= 1.
1831 * Fails if 'low' < 0 or 'high' is present and not higher than 'low'.
1832 * Returns 0 if succeeded, -1 if not.
1833 */
1834static int srv_tmpl_parse_range(struct server *srv, const char *arg, int *nb_low, int *nb_high)
1835{
1836 char *nb_high_arg;
1837
1838 *nb_high = 0;
1839 chunk_printf(&trash, "%s", arg);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001840 *nb_low = atoi(trash.area);
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001841
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001842 if ((nb_high_arg = strchr(trash.area, '-'))) {
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001843 *nb_high_arg++ = '\0';
1844 *nb_high = atoi(nb_high_arg);
1845 }
1846 else {
1847 *nb_high += *nb_low;
1848 *nb_low = 1;
1849 }
1850
1851 if (*nb_low < 0 || *nb_high < *nb_low)
1852 return -1;
1853
1854 return 0;
1855}
1856
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001857static inline void srv_set_id_from_prefix(struct server *srv, const char *prefix, int nb)
1858{
1859 chunk_printf(&trash, "%s%d", prefix, nb);
1860 free(srv->id);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001861 srv->id = strdup(trash.area);
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001862}
1863
1864/*
1865 * Initialize as much as possible servers from <srv> server template.
1866 * Note that a server template is a special server with
1867 * a few different parameters than a server which has
1868 * been parsed mostly the same way as a server.
Joseph Herlant44466822018-11-15 08:57:51 -08001869 * Returns the number of servers successfully allocated,
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001870 * 'srv' template included.
1871 */
1872static int server_template_init(struct server *srv, struct proxy *px)
1873{
1874 int i;
1875 struct server *newsrv;
1876
1877 for (i = srv->tmpl_info.nb_low + 1; i <= srv->tmpl_info.nb_high; i++) {
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001878 newsrv = new_server(px);
1879 if (!newsrv)
1880 goto err;
1881
Christopher Faulet75bef002020-11-02 22:04:55 +01001882 newsrv->conf.file = strdup(srv->conf.file);
1883 newsrv->conf.line = srv->conf.line;
1884
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001885 srv_settings_cpy(newsrv, srv, 1);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02001886 srv_prepare_for_resolution(newsrv, srv->hostname);
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001887#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
1888 if (newsrv->sni_expr) {
1889 newsrv->ssl_ctx.sni = srv_sni_sample_parse_expr(newsrv, px, NULL, 0, NULL);
1890 if (!newsrv->ssl_ctx.sni)
1891 goto err;
1892 }
1893#endif
Emeric Brun32131d42021-06-11 10:48:45 +02001894 /* append to list of servers available to receive an hostname */
Emeric Brund671e9f2021-06-14 10:02:18 +02001895 if (newsrv->srvrq)
1896 LIST_ADDQ(&newsrv->srvrq->attached_servers, &newsrv->srv_rec_item);
Emeric Brun32131d42021-06-11 10:48:45 +02001897
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001898 /* Set this new server ID. */
1899 srv_set_id_from_prefix(newsrv, srv->tmpl_info.prefix, i);
1900
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001901 /* Linked backwards first. This will be restablished after parsing. */
1902 newsrv->next = px->srv;
1903 px->srv = newsrv;
1904 }
1905 srv_set_id_from_prefix(srv, srv->tmpl_info.prefix, srv->tmpl_info.nb_low);
1906
1907 return i - srv->tmpl_info.nb_low;
1908
1909 err:
1910 srv_set_id_from_prefix(srv, srv->tmpl_info.prefix, srv->tmpl_info.nb_low);
1911 if (newsrv) {
1912#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
1913 release_sample_expr(newsrv->ssl_ctx.sni);
1914#endif
1915 free_check(&newsrv->agent);
1916 free_check(&newsrv->check);
1917 }
1918 free(newsrv);
1919 return i - srv->tmpl_info.nb_low;
1920}
1921
Emeric Brund3db3842020-07-21 16:54:36 +02001922int parse_server(const char *file, int linenum, char **args, struct proxy *curproxy,
1923 struct proxy *defproxy, int parse_addr, int in_peers_section, int initial_resolve)
Willy Tarreau272adea2014-03-31 10:39:59 +02001924{
1925 struct server *newsrv = NULL;
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001926 const char *err = NULL;
Willy Tarreau272adea2014-03-31 10:39:59 +02001927 char *errmsg = NULL;
1928 int err_code = 0;
1929 unsigned val;
Willy Tarreau07101d52015-09-08 16:16:35 +02001930 char *fqdn = NULL;
Willy Tarreau272adea2014-03-31 10:39:59 +02001931
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001932 if (!strcmp(args[0], "server") ||
Frédéric Lécaillec06b5d42018-04-26 10:06:41 +02001933 !strcmp(args[0], "peer") ||
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001934 !strcmp(args[0], "default-server") ||
1935 !strcmp(args[0], "server-template")) {
Willy Tarreau272adea2014-03-31 10:39:59 +02001936 int cur_arg;
Frédéric Lécaille6e0843c2017-03-21 16:39:15 +01001937 int defsrv = (*args[0] == 'd');
Frédéric Lécaillec06b5d42018-04-26 10:06:41 +02001938 int srv = !defsrv && (*args[0] == 'p' || !strcmp(args[0], "server"));
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001939 int srv_tmpl = !defsrv && !srv;
1940 int tmpl_range_low = 0, tmpl_range_high = 0;
Willy Tarreau272adea2014-03-31 10:39:59 +02001941
1942 if (!defsrv && curproxy == defproxy) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001943 ha_alert("parsing [%s:%d] : '%s' not allowed in 'defaults' section.\n", file, linenum, args[0]);
Willy Tarreau272adea2014-03-31 10:39:59 +02001944 err_code |= ERR_ALERT | ERR_FATAL;
1945 goto out;
1946 }
Christopher Faulet75ffbf92021-01-13 13:14:13 +01001947 else if (failifnotcap(curproxy, PR_CAP_BE, file, linenum, args[0], NULL)) {
1948 err_code |= ERR_ALERT | ERR_FATAL;
1949 goto out;
1950 }
Willy Tarreau272adea2014-03-31 10:39:59 +02001951
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001952 /* There is no mandatory first arguments for default server. */
Frédéric Lécaille355b2032019-01-11 14:06:12 +01001953 if (srv && parse_addr) {
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001954 if (!*args[2]) {
Frédéric Lécaille8ba10fe2020-04-03 09:43:47 +02001955 if (in_peers_section) {
1956 return 0;
1957 }
1958 else {
1959 /* 'server' line number of argument check. */
1960 ha_alert("parsing [%s:%d] : '%s' expects <name> and <addr>[:<port>] as arguments.\n",
1961 file, linenum, args[0]);
1962 err_code |= ERR_ALERT | ERR_FATAL;
1963 goto out;
1964 }
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001965 }
1966
1967 err = invalid_char(args[1]);
1968 }
1969 else if (srv_tmpl) {
1970 if (!*args[3]) {
1971 /* 'server-template' line number of argument check. */
Christopher Faulet767a84b2017-11-24 16:50:31 +01001972 ha_alert("parsing [%s:%d] : '%s' expects <prefix> <nb | range> <addr>[:<port>] as arguments.\n",
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001973 file, linenum, args[0]);
1974 err_code |= ERR_ALERT | ERR_FATAL;
1975 goto out;
1976 }
1977
1978 err = invalid_prefix_char(args[1]);
Willy Tarreau272adea2014-03-31 10:39:59 +02001979 }
1980
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001981 if (err) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001982 ha_alert("parsing [%s:%d] : character '%c' is not permitted in %s %s '%s'.\n",
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001983 file, linenum, *err, args[0], srv ? "name" : "prefix", args[1]);
Willy Tarreau272adea2014-03-31 10:39:59 +02001984 err_code |= ERR_ALERT | ERR_FATAL;
1985 goto out;
1986 }
1987
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001988 cur_arg = 2;
1989 if (srv_tmpl) {
1990 /* Parse server-template <nb | range> arg. */
1991 if (srv_tmpl_parse_range(newsrv, args[cur_arg], &tmpl_range_low, &tmpl_range_high) < 0) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001992 ha_alert("parsing [%s:%d] : Wrong %s number or range arg '%s'.\n",
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02001993 file, linenum, args[0], args[cur_arg]);
1994 err_code |= ERR_ALERT | ERR_FATAL;
1995 goto out;
1996 }
1997 cur_arg++;
1998 }
1999
Willy Tarreau272adea2014-03-31 10:39:59 +02002000 if (!defsrv) {
2001 struct sockaddr_storage *sk;
Willy Tarreau6ecb10a2017-01-06 18:36:06 +01002002 int port1, port2, port;
Willy Tarreau272adea2014-03-31 10:39:59 +02002003
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002004 newsrv = new_server(curproxy);
2005 if (!newsrv) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002006 ha_alert("parsing [%s:%d] : out of memory.\n", file, linenum);
Willy Tarreau272adea2014-03-31 10:39:59 +02002007 err_code |= ERR_ALERT | ERR_ABORT;
2008 goto out;
2009 }
2010
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002011 if (srv_tmpl) {
2012 newsrv->tmpl_info.nb_low = tmpl_range_low;
2013 newsrv->tmpl_info.nb_high = tmpl_range_high;
2014 }
2015
Willy Tarreau272adea2014-03-31 10:39:59 +02002016 /* the servers are linked backwards first */
2017 newsrv->next = curproxy->srv;
2018 curproxy->srv = newsrv;
Willy Tarreau272adea2014-03-31 10:39:59 +02002019 newsrv->conf.file = strdup(file);
2020 newsrv->conf.line = linenum;
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002021 /* Note: for a server template, its id is its prefix.
2022 * This is a temporary id which will be used for server allocations to come
2023 * after parsing.
2024 */
2025 if (srv)
2026 newsrv->id = strdup(args[1]);
2027 else
2028 newsrv->tmpl_info.prefix = strdup(args[1]);
Willy Tarreau272adea2014-03-31 10:39:59 +02002029
2030 /* several ways to check the port component :
2031 * - IP => port=+0, relative (IPv4 only)
2032 * - IP: => port=+0, relative
2033 * - IP:N => port=N, absolute
2034 * - IP:+N => port=+N, relative
2035 * - IP:-N => port=-N, relative
2036 */
Frédéric Lécaille355b2032019-01-11 14:06:12 +01002037 if (!parse_addr)
2038 goto skip_addr;
2039
Willy Tarreau65ec4e32020-09-16 19:17:08 +02002040 sk = str2sa_range(args[cur_arg], &port, &port1, &port2, NULL, NULL,
2041 &errmsg, NULL, &fqdn,
2042 (initial_resolve ? PA_O_RESOLVE : 0) | PA_O_PORT_OK | PA_O_PORT_OFS | PA_O_STREAM | PA_O_XPRT | PA_O_CONNECT);
Willy Tarreau272adea2014-03-31 10:39:59 +02002043 if (!sk) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002044 ha_alert("parsing [%s:%d] : '%s %s' : %s\n", file, linenum, args[0], args[1], errmsg);
Willy Tarreau272adea2014-03-31 10:39:59 +02002045 err_code |= ERR_ALERT | ERR_FATAL;
2046 goto out;
2047 }
2048
Willy Tarreau272adea2014-03-31 10:39:59 +02002049 if (!port1 || !port2) {
2050 /* no port specified, +offset, -offset */
Willy Tarreauc93cd162014-05-13 15:54:22 +02002051 newsrv->flags |= SRV_F_MAPPORTS;
Willy Tarreau272adea2014-03-31 10:39:59 +02002052 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002053
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002054 /* save hostname and create associated name resolution */
Baptiste Assmann4f91f7e2017-05-03 12:09:54 +02002055 if (fqdn) {
Christopher Faulet67957bd2017-09-27 11:00:59 +02002056 if (fqdn[0] == '_') { /* SRV record */
Olivier Houchard8da5f982017-08-04 18:35:36 +02002057 /* Check if a SRV request already exists, and if not, create it */
Christopher Faulet67957bd2017-09-27 11:00:59 +02002058 if ((newsrv->srvrq = find_srvrq_by_name(fqdn, curproxy)) == NULL)
2059 newsrv->srvrq = new_dns_srvrq(newsrv, fqdn);
2060 if (newsrv->srvrq == NULL) {
Olivier Houchard8da5f982017-08-04 18:35:36 +02002061 err_code |= ERR_ALERT | ERR_FATAL;
2062 goto out;
Christopher Faulet67957bd2017-09-27 11:00:59 +02002063 }
2064 }
2065 else if (srv_prepare_for_resolution(newsrv, fqdn) == -1) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002066 ha_alert("parsing [%s:%d] : Can't create DNS resolution for server '%s'\n",
Christopher Faulet67957bd2017-09-27 11:00:59 +02002067 file, linenum, newsrv->id);
2068 err_code |= ERR_ALERT | ERR_FATAL;
2069 goto out;
Baptiste Assmann4f91f7e2017-05-03 12:09:54 +02002070 }
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002071 }
2072
Willy Tarreau272adea2014-03-31 10:39:59 +02002073 newsrv->addr = *sk;
Willy Tarreau6ecb10a2017-01-06 18:36:06 +01002074 newsrv->svc_port = port;
Willy Tarreau272adea2014-03-31 10:39:59 +02002075
Olivier Houchard8da5f982017-08-04 18:35:36 +02002076 if (!newsrv->srvrq && !newsrv->hostname && !protocol_by_family(newsrv->addr.ss_family)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002077 ha_alert("parsing [%s:%d] : Unknown protocol family %d '%s'\n",
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002078 file, linenum, newsrv->addr.ss_family, args[cur_arg]);
Willy Tarreau272adea2014-03-31 10:39:59 +02002079 err_code |= ERR_ALERT | ERR_FATAL;
2080 goto out;
2081 }
Frédéric Lécaille5c3cd972017-03-15 16:36:09 +01002082
Frédéric Lécaille355b2032019-01-11 14:06:12 +01002083 cur_arg++;
2084 skip_addr:
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002085 /* Copy default server settings to new server settings. */
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002086 srv_settings_cpy(newsrv, &curproxy->defsrv, 0);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01002087 HA_SPIN_INIT(&newsrv->lock);
Willy Tarreau272adea2014-03-31 10:39:59 +02002088 } else {
2089 newsrv = &curproxy->defsrv;
2090 cur_arg = 1;
Thierry Fournierada34842016-02-17 21:25:09 +01002091 newsrv->dns_opts.family_prio = AF_INET6;
Baptiste Assmann8e2d9432018-06-22 15:04:43 +02002092 newsrv->dns_opts.accept_duplicate_ip = 0;
Willy Tarreau272adea2014-03-31 10:39:59 +02002093 }
2094
2095 while (*args[cur_arg]) {
Christopher Fauletcbba66c2020-04-06 14:26:30 +02002096 if (!strcmp(args[cur_arg], "init-addr")) {
Baptiste Assmann25938272016-09-21 20:26:16 +02002097 char *p, *end;
2098 int done;
Willy Tarreau4310d362016-11-02 15:05:56 +01002099 struct sockaddr_storage sa;
Baptiste Assmann25938272016-09-21 20:26:16 +02002100
2101 newsrv->init_addr_methods = 0;
2102 memset(&newsrv->init_addr, 0, sizeof(newsrv->init_addr));
2103
2104 for (p = args[cur_arg + 1]; *p; p = end) {
2105 /* cut on next comma */
2106 for (end = p; *end && *end != ','; end++);
2107 if (*end)
2108 *(end++) = 0;
2109
Willy Tarreau4310d362016-11-02 15:05:56 +01002110 memset(&sa, 0, sizeof(sa));
Baptiste Assmann25938272016-09-21 20:26:16 +02002111 if (!strcmp(p, "libc")) {
2112 done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_LIBC);
2113 }
2114 else if (!strcmp(p, "last")) {
2115 done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_LAST);
2116 }
Willy Tarreau37ebe122016-11-04 15:17:58 +01002117 else if (!strcmp(p, "none")) {
2118 done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_NONE);
2119 }
Willy Tarreau4310d362016-11-02 15:05:56 +01002120 else if (str2ip2(p, &sa, 0)) {
2121 if (is_addr(&newsrv->init_addr)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002122 ha_alert("parsing [%s:%d]: '%s' : initial address already specified, cannot add '%s'.\n",
Willy Tarreau4310d362016-11-02 15:05:56 +01002123 file, linenum, args[cur_arg], p);
2124 err_code |= ERR_ALERT | ERR_FATAL;
2125 goto out;
2126 }
2127 newsrv->init_addr = sa;
2128 done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_IP);
2129 }
Baptiste Assmann25938272016-09-21 20:26:16 +02002130 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002131 ha_alert("parsing [%s:%d]: '%s' : unknown init-addr method '%s', supported methods are 'libc', 'last', 'none'.\n",
Baptiste Assmann25938272016-09-21 20:26:16 +02002132 file, linenum, args[cur_arg], p);
2133 err_code |= ERR_ALERT | ERR_FATAL;
2134 goto out;
2135 }
2136 if (!done) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002137 ha_alert("parsing [%s:%d]: '%s' : too many init-addr methods when trying to add '%s'\n",
Baptiste Assmann25938272016-09-21 20:26:16 +02002138 file, linenum, args[cur_arg], p);
2139 err_code |= ERR_ALERT | ERR_FATAL;
2140 goto out;
2141 }
2142 }
2143 cur_arg += 2;
2144 }
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002145 else if (!strcmp(args[cur_arg], "resolvers")) {
Frédéric Lécailledaa2fe62017-04-20 12:17:50 +02002146 free(newsrv->resolvers_id);
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002147 newsrv->resolvers_id = strdup(args[cur_arg + 1]);
2148 cur_arg += 2;
2149 }
Baptiste Assmann8e2d9432018-06-22 15:04:43 +02002150 else if (!strcmp(args[cur_arg], "resolve-opts")) {
2151 char *p, *end;
2152
2153 for (p = args[cur_arg + 1]; *p; p = end) {
2154 /* cut on next comma */
2155 for (end = p; *end && *end != ','; end++);
2156 if (*end)
2157 *(end++) = 0;
2158
2159 if (!strcmp(p, "allow-dup-ip")) {
2160 newsrv->dns_opts.accept_duplicate_ip = 1;
2161 }
Daniel Corbettf8716912019-11-17 09:48:56 -05002162 else if (!strcmp(p, "ignore-weight")) {
2163 newsrv->dns_opts.ignore_weight = 1;
2164 }
Baptiste Assmann8e2d9432018-06-22 15:04:43 +02002165 else if (!strcmp(p, "prevent-dup-ip")) {
2166 newsrv->dns_opts.accept_duplicate_ip = 0;
2167 }
2168 else {
Daniel Corbettf8716912019-11-17 09:48:56 -05002169 ha_alert("parsing [%s:%d]: '%s' : unknown resolve-opts option '%s', supported methods are 'allow-dup-ip', 'ignore-weight', and 'prevent-dup-ip'.\n",
Baptiste Assmann8e2d9432018-06-22 15:04:43 +02002170 file, linenum, args[cur_arg], p);
2171 err_code |= ERR_ALERT | ERR_FATAL;
2172 goto out;
2173 }
2174 }
2175
2176 cur_arg += 2;
2177 }
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002178 else if (!strcmp(args[cur_arg], "resolve-prefer")) {
2179 if (!strcmp(args[cur_arg + 1], "ipv4"))
Thierry Fournierada34842016-02-17 21:25:09 +01002180 newsrv->dns_opts.family_prio = AF_INET;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002181 else if (!strcmp(args[cur_arg + 1], "ipv6"))
Thierry Fournierada34842016-02-17 21:25:09 +01002182 newsrv->dns_opts.family_prio = AF_INET6;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002183 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002184 ha_alert("parsing [%s:%d]: '%s' expects either ipv4 or ipv6 as argument.\n",
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002185 file, linenum, args[cur_arg]);
2186 err_code |= ERR_ALERT | ERR_FATAL;
2187 goto out;
2188 }
2189 cur_arg += 2;
2190 }
Thierry Fournierac88cfe2016-02-17 22:05:30 +01002191 else if (!strcmp(args[cur_arg], "resolve-net")) {
2192 char *p, *e;
2193 unsigned char mask;
2194 struct dns_options *opt;
2195
2196 if (!args[cur_arg + 1] || args[cur_arg + 1][0] == '\0') {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002197 ha_alert("parsing [%s:%d]: '%s' expects a list of networks.\n",
Thierry Fournierac88cfe2016-02-17 22:05:30 +01002198 file, linenum, args[cur_arg]);
2199 err_code |= ERR_ALERT | ERR_FATAL;
2200 goto out;
2201 }
2202
2203 opt = &newsrv->dns_opts;
2204
2205 /* Split arguments by comma, and convert it from ipv4 or ipv6
2206 * string network in in_addr or in6_addr.
2207 */
2208 p = args[cur_arg + 1];
2209 e = p;
2210 while (*p != '\0') {
Joseph Herlant44466822018-11-15 08:57:51 -08002211 /* If no room available, return error. */
David Carlierd10025c2016-04-08 10:26:44 +01002212 if (opt->pref_net_nb >= SRV_MAX_PREF_NET) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002213 ha_alert("parsing [%s:%d]: '%s' exceed %d networks.\n",
Thierry Fournierac88cfe2016-02-17 22:05:30 +01002214 file, linenum, args[cur_arg], SRV_MAX_PREF_NET);
2215 err_code |= ERR_ALERT | ERR_FATAL;
2216 goto out;
2217 }
2218 /* look for end or comma. */
2219 while (*e != ',' && *e != '\0')
2220 e++;
2221 if (*e == ',') {
2222 *e = '\0';
2223 e++;
2224 }
2225 if (str2net(p, 0, &opt->pref_net[opt->pref_net_nb].addr.in4,
2226 &opt->pref_net[opt->pref_net_nb].mask.in4)) {
2227 /* Try to convert input string from ipv4 or ipv6 network. */
2228 opt->pref_net[opt->pref_net_nb].family = AF_INET;
2229 } else if (str62net(p, &opt->pref_net[opt->pref_net_nb].addr.in6,
2230 &mask)) {
2231 /* Try to convert input string from ipv6 network. */
2232 len2mask6(mask, &opt->pref_net[opt->pref_net_nb].mask.in6);
2233 opt->pref_net[opt->pref_net_nb].family = AF_INET6;
2234 } else {
Ilya Shipitsinc02a23f2020-05-06 00:53:22 +05002235 /* All network conversions fail, return error. */
Christopher Faulet767a84b2017-11-24 16:50:31 +01002236 ha_alert("parsing [%s:%d]: '%s': invalid network '%s'.\n",
Thierry Fournierac88cfe2016-02-17 22:05:30 +01002237 file, linenum, args[cur_arg], p);
2238 err_code |= ERR_ALERT | ERR_FATAL;
2239 goto out;
2240 }
2241 opt->pref_net_nb++;
2242 p = e;
2243 }
2244
2245 cur_arg += 2;
2246 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002247 else if (!strcmp(args[cur_arg], "weight")) {
2248 int w;
2249 w = atol(args[cur_arg + 1]);
2250 if (w < 0 || w > SRV_UWGHT_MAX) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002251 ha_alert("parsing [%s:%d] : weight of server %s is not within 0 and %d (%d).\n",
Willy Tarreau272adea2014-03-31 10:39:59 +02002252 file, linenum, newsrv->id, SRV_UWGHT_MAX, w);
2253 err_code |= ERR_ALERT | ERR_FATAL;
2254 goto out;
2255 }
2256 newsrv->uweight = newsrv->iweight = w;
2257 cur_arg += 2;
2258 }
Emeric Brun97556472020-05-30 01:42:45 +02002259 else if (!strcmp(args[cur_arg], "log-proto")) {
2260 if (!strcmp(args[cur_arg + 1], "legacy"))
2261 newsrv->log_proto = SRV_LOG_PROTO_LEGACY;
2262 else if (!strcmp(args[cur_arg + 1], "octet-count"))
2263 newsrv->log_proto = SRV_LOG_PROTO_OCTET_COUNTING;
2264 else {
2265 ha_alert("parsing [%s:%d]: '%s' expects one of 'legacy' or "
2266 "'octet-count' but got '%s'\n",
2267 file, linenum, args[cur_arg], args[cur_arg + 1]);
2268 err_code |= ERR_ALERT | ERR_FATAL;
2269 goto out;
2270 }
2271 cur_arg += 2;
2272 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002273 else if (!strcmp(args[cur_arg], "minconn")) {
2274 newsrv->minconn = atol(args[cur_arg + 1]);
2275 cur_arg += 2;
2276 }
2277 else if (!strcmp(args[cur_arg], "maxconn")) {
2278 newsrv->maxconn = atol(args[cur_arg + 1]);
2279 cur_arg += 2;
2280 }
2281 else if (!strcmp(args[cur_arg], "maxqueue")) {
2282 newsrv->maxqueue = atol(args[cur_arg + 1]);
2283 cur_arg += 2;
2284 }
2285 else if (!strcmp(args[cur_arg], "slowstart")) {
2286 /* slowstart is stored in seconds */
2287 const char *err = parse_time_err(args[cur_arg + 1], &val, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +02002288
2289 if (err == PARSE_TIME_OVER) {
2290 ha_alert("parsing [%s:%d]: timer overflow in argument <%s> to <%s> of server %s, maximum value is 2147483647 ms (~24.8 days).\n",
2291 file, linenum, args[cur_arg+1], args[cur_arg], newsrv->id);
2292 err_code |= ERR_ALERT | ERR_FATAL;
2293 goto out;
2294 }
2295 else if (err == PARSE_TIME_UNDER) {
2296 ha_alert("parsing [%s:%d]: timer underflow in argument <%s> to <%s> of server %s, minimum non-null value is 1 ms.\n",
2297 file, linenum, args[cur_arg+1], args[cur_arg], newsrv->id);
2298 err_code |= ERR_ALERT | ERR_FATAL;
2299 goto out;
2300 }
2301 else if (err) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002302 ha_alert("parsing [%s:%d] : unexpected character '%c' in 'slowstart' argument of server %s.\n",
Willy Tarreau272adea2014-03-31 10:39:59 +02002303 file, linenum, *err, newsrv->id);
2304 err_code |= ERR_ALERT | ERR_FATAL;
2305 goto out;
2306 }
2307 newsrv->slowstart = (val + 999) / 1000;
2308 cur_arg += 2;
2309 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002310 else if (!strcmp(args[cur_arg], "on-error")) {
2311 if (!strcmp(args[cur_arg + 1], "fastinter"))
2312 newsrv->onerror = HANA_ONERR_FASTINTER;
2313 else if (!strcmp(args[cur_arg + 1], "fail-check"))
2314 newsrv->onerror = HANA_ONERR_FAILCHK;
2315 else if (!strcmp(args[cur_arg + 1], "sudden-death"))
2316 newsrv->onerror = HANA_ONERR_SUDDTH;
2317 else if (!strcmp(args[cur_arg + 1], "mark-down"))
2318 newsrv->onerror = HANA_ONERR_MARKDWN;
2319 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002320 ha_alert("parsing [%s:%d]: '%s' expects one of 'fastinter', "
Willy Tarreau272adea2014-03-31 10:39:59 +02002321 "'fail-check', 'sudden-death' or 'mark-down' but got '%s'\n",
2322 file, linenum, args[cur_arg], args[cur_arg + 1]);
2323 err_code |= ERR_ALERT | ERR_FATAL;
2324 goto out;
2325 }
2326
2327 cur_arg += 2;
2328 }
2329 else if (!strcmp(args[cur_arg], "on-marked-down")) {
2330 if (!strcmp(args[cur_arg + 1], "shutdown-sessions"))
2331 newsrv->onmarkeddown = HANA_ONMARKEDDOWN_SHUTDOWNSESSIONS;
2332 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002333 ha_alert("parsing [%s:%d]: '%s' expects 'shutdown-sessions' but got '%s'\n",
Willy Tarreau272adea2014-03-31 10:39:59 +02002334 file, linenum, args[cur_arg], args[cur_arg + 1]);
2335 err_code |= ERR_ALERT | ERR_FATAL;
2336 goto out;
2337 }
2338
2339 cur_arg += 2;
2340 }
2341 else if (!strcmp(args[cur_arg], "on-marked-up")) {
2342 if (!strcmp(args[cur_arg + 1], "shutdown-backup-sessions"))
2343 newsrv->onmarkedup = HANA_ONMARKEDUP_SHUTDOWNBACKUPSESSIONS;
2344 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002345 ha_alert("parsing [%s:%d]: '%s' expects 'shutdown-backup-sessions' but got '%s'\n",
Willy Tarreau272adea2014-03-31 10:39:59 +02002346 file, linenum, args[cur_arg], args[cur_arg + 1]);
2347 err_code |= ERR_ALERT | ERR_FATAL;
2348 goto out;
2349 }
2350
2351 cur_arg += 2;
2352 }
2353 else if (!strcmp(args[cur_arg], "error-limit")) {
2354 if (!*args[cur_arg + 1]) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002355 ha_alert("parsing [%s:%d]: '%s' expects an integer argument.\n",
Willy Tarreau272adea2014-03-31 10:39:59 +02002356 file, linenum, args[cur_arg]);
2357 err_code |= ERR_ALERT | ERR_FATAL;
2358 goto out;
2359 }
2360
2361 newsrv->consecutive_errors_limit = atoi(args[cur_arg + 1]);
2362
2363 if (newsrv->consecutive_errors_limit <= 0) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002364 ha_alert("parsing [%s:%d]: %s has to be > 0.\n",
Willy Tarreau272adea2014-03-31 10:39:59 +02002365 file, linenum, args[cur_arg]);
2366 err_code |= ERR_ALERT | ERR_FATAL;
2367 goto out;
2368 }
2369 cur_arg += 2;
2370 }
Frédéric Lécaille8d083ed2017-04-14 15:19:56 +02002371 else if (!strcmp(args[cur_arg], "usesrc")) { /* address to use outside: needs "source" first */
Christopher Faulet767a84b2017-11-24 16:50:31 +01002372 ha_alert("parsing [%s:%d] : '%s' only allowed after a '%s' statement.\n",
Willy Tarreau272adea2014-03-31 10:39:59 +02002373 file, linenum, "usesrc", "source");
2374 err_code |= ERR_ALERT | ERR_FATAL;
2375 goto out;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01002376 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002377 else {
2378 static int srv_dumped;
2379 struct srv_kw *kw;
2380 char *err;
2381
2382 kw = srv_find_kw(args[cur_arg]);
2383 if (kw) {
2384 char *err = NULL;
2385 int code;
2386
2387 if (!kw->parse) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002388 ha_alert("parsing [%s:%d] : '%s %s' : '%s' option is not implemented in this version (check build options).\n",
Willy Tarreau272adea2014-03-31 10:39:59 +02002389 file, linenum, args[0], args[1], args[cur_arg]);
Frédéric Lécailledfacd692017-04-16 17:14:14 +02002390 if (kw->skip != -1)
2391 cur_arg += 1 + kw->skip ;
Willy Tarreau272adea2014-03-31 10:39:59 +02002392 err_code |= ERR_ALERT | ERR_FATAL;
2393 goto out;
2394 }
2395
2396 if (defsrv && !kw->default_ok) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002397 ha_alert("parsing [%s:%d] : '%s %s' : '%s' option is not accepted in default-server sections.\n",
Willy Tarreau272adea2014-03-31 10:39:59 +02002398 file, linenum, args[0], args[1], args[cur_arg]);
Frédéric Lécailledfacd692017-04-16 17:14:14 +02002399 if (kw->skip != -1)
2400 cur_arg += 1 + kw->skip ;
Willy Tarreau272adea2014-03-31 10:39:59 +02002401 err_code |= ERR_ALERT;
2402 continue;
2403 }
2404
2405 code = kw->parse(args, &cur_arg, curproxy, newsrv, &err);
2406 err_code |= code;
2407
2408 if (code) {
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01002409 display_parser_err(file, linenum, args, cur_arg, code, &err);
Willy Tarreau272adea2014-03-31 10:39:59 +02002410 if (code & ERR_FATAL) {
2411 free(err);
Frédéric Lécailledfacd692017-04-16 17:14:14 +02002412 if (kw->skip != -1)
2413 cur_arg += 1 + kw->skip;
Willy Tarreau272adea2014-03-31 10:39:59 +02002414 goto out;
2415 }
2416 }
2417 free(err);
Frédéric Lécailledfacd692017-04-16 17:14:14 +02002418 if (kw->skip != -1)
2419 cur_arg += 1 + kw->skip;
Willy Tarreau272adea2014-03-31 10:39:59 +02002420 continue;
2421 }
2422
2423 err = NULL;
2424 if (!srv_dumped) {
2425 srv_dump_kws(&err);
2426 indent_msg(&err, 4);
2427 srv_dumped = 1;
2428 }
2429
Christopher Faulet767a84b2017-11-24 16:50:31 +01002430 ha_alert("parsing [%s:%d] : '%s %s' unknown keyword '%s'.%s%s\n",
Willy Tarreau272adea2014-03-31 10:39:59 +02002431 file, linenum, args[0], args[1], args[cur_arg],
2432 err ? " Registered keywords :" : "", err ? err : "");
2433 free(err);
2434
2435 err_code |= ERR_ALERT | ERR_FATAL;
2436 goto out;
2437 }
2438 }
2439
Frédéric Lécaille759ea982017-03-30 17:32:36 +02002440 if (!defsrv)
2441 err_code |= server_finalize_init(file, linenum, args, cur_arg, newsrv, curproxy);
2442 if (err_code & ERR_FATAL)
2443 goto out;
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002444 if (srv_tmpl)
2445 server_template_init(newsrv, curproxy);
Willy Tarreau272adea2014-03-31 10:39:59 +02002446 }
Willy Tarreau07101d52015-09-08 16:16:35 +02002447 free(fqdn);
Willy Tarreau272adea2014-03-31 10:39:59 +02002448 return 0;
2449
2450 out:
Willy Tarreau07101d52015-09-08 16:16:35 +02002451 free(fqdn);
Willy Tarreau272adea2014-03-31 10:39:59 +02002452 free(errmsg);
2453 return err_code;
2454}
2455
Baptiste Assmann19a106d2015-07-08 22:03:56 +02002456/* Returns a pointer to the first server matching either id <id>.
2457 * NULL is returned if no match is found.
2458 * the lookup is performed in the backend <bk>
2459 */
2460struct server *server_find_by_id(struct proxy *bk, int id)
2461{
2462 struct eb32_node *eb32;
2463 struct server *curserver;
2464
2465 if (!bk || (id ==0))
2466 return NULL;
2467
2468 /* <bk> has no backend capabilities, so it can't have a server */
2469 if (!(bk->cap & PR_CAP_BE))
2470 return NULL;
2471
2472 curserver = NULL;
2473
2474 eb32 = eb32_lookup(&bk->conf.used_server_id, id);
2475 if (eb32)
2476 curserver = container_of(eb32, struct server, conf.id);
2477
2478 return curserver;
2479}
2480
2481/* Returns a pointer to the first server matching either name <name>, or id
2482 * if <name> starts with a '#'. NULL is returned if no match is found.
2483 * the lookup is performed in the backend <bk>
2484 */
2485struct server *server_find_by_name(struct proxy *bk, const char *name)
2486{
2487 struct server *curserver;
2488
2489 if (!bk || !name)
2490 return NULL;
2491
2492 /* <bk> has no backend capabilities, so it can't have a server */
2493 if (!(bk->cap & PR_CAP_BE))
2494 return NULL;
2495
2496 curserver = NULL;
2497 if (*name == '#') {
2498 curserver = server_find_by_id(bk, atoi(name + 1));
2499 if (curserver)
2500 return curserver;
2501 }
2502 else {
2503 curserver = bk->srv;
2504
2505 while (curserver && (strcmp(curserver->id, name) != 0))
2506 curserver = curserver->next;
2507
2508 if (curserver)
2509 return curserver;
2510 }
2511
2512 return NULL;
2513}
2514
2515struct server *server_find_best_match(struct proxy *bk, char *name, int id, int *diff)
2516{
2517 struct server *byname;
2518 struct server *byid;
2519
2520 if (!name && !id)
2521 return NULL;
2522
2523 if (diff)
2524 *diff = 0;
2525
2526 byname = byid = NULL;
2527
2528 if (name) {
2529 byname = server_find_by_name(bk, name);
2530 if (byname && (!id || byname->puid == id))
2531 return byname;
2532 }
2533
2534 /* remaining possibilities :
2535 * - name not set
2536 * - name set but not found
2537 * - name found but ID doesn't match
2538 */
2539 if (id) {
2540 byid = server_find_by_id(bk, id);
2541 if (byid) {
2542 if (byname) {
2543 /* use id only if forced by configuration */
2544 if (byid->flags & SRV_F_FORCED_ID) {
2545 if (diff)
2546 *diff |= 2;
2547 return byid;
2548 }
2549 else {
2550 if (diff)
2551 *diff |= 1;
2552 return byname;
2553 }
2554 }
2555
2556 /* remaining possibilities:
2557 * - name not set
2558 * - name set but not found
2559 */
2560 if (name && diff)
2561 *diff |= 2;
2562 return byid;
2563 }
2564
2565 /* id bot found */
2566 if (byname) {
2567 if (diff)
2568 *diff |= 1;
2569 return byname;
2570 }
2571 }
2572
2573 return NULL;
2574}
2575
Willy Tarreau46b7f532018-08-21 11:54:26 +02002576/* Update a server state using the parameters available in the params list.
2577 *
2578 * Grabs the server lock during operation.
2579 */
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002580static void srv_update_state(struct server *srv, int version, char **params)
2581{
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002582 char *p;
Willy Tarreau83061a82018-07-13 11:56:34 +02002583 struct buffer *msg;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002584
2585 /* fields since version 1
2586 * and common to all other upcoming versions
2587 */
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002588 enum srv_state srv_op_state;
2589 enum srv_admin srv_admin_state;
2590 unsigned srv_uweight, srv_iweight;
2591 unsigned long srv_last_time_change;
2592 short srv_check_status;
2593 enum chk_result srv_check_result;
2594 int srv_check_health;
2595 int srv_check_state, srv_agent_state;
2596 int bk_f_forced_id;
2597 int srv_f_forced_id;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002598 int fqdn_set_by_cli;
2599 const char *fqdn;
Frédéric Lécaille31694712017-08-01 08:47:19 +02002600 const char *port_str;
2601 unsigned int port;
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02002602 char *srvrecord;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002603
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002604 fqdn = NULL;
Frédéric Lécaille31694712017-08-01 08:47:19 +02002605 port = 0;
Willy Tarreau31138fa2015-09-29 18:38:47 +02002606 msg = get_trash_chunk();
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002607 switch (version) {
2608 case 1:
2609 /*
2610 * now we can proceed with server's state update:
2611 * srv_addr: params[0]
2612 * srv_op_state: params[1]
2613 * srv_admin_state: params[2]
2614 * srv_uweight: params[3]
2615 * srv_iweight: params[4]
2616 * srv_last_time_change: params[5]
2617 * srv_check_status: params[6]
2618 * srv_check_result: params[7]
2619 * srv_check_health: params[8]
2620 * srv_check_state: params[9]
2621 * srv_agent_state: params[10]
2622 * bk_f_forced_id: params[11]
2623 * srv_f_forced_id: params[12]
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002624 * srv_fqdn: params[13]
Frédéric Lécaille31694712017-08-01 08:47:19 +02002625 * srv_port: params[14]
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02002626 * srvrecord: params[15]
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002627 */
2628
2629 /* validating srv_op_state */
2630 p = NULL;
2631 errno = 0;
2632 srv_op_state = strtol(params[1], &p, 10);
2633 if ((p == params[1]) || errno == EINVAL || errno == ERANGE ||
2634 (srv_op_state != SRV_ST_STOPPED &&
2635 srv_op_state != SRV_ST_STARTING &&
2636 srv_op_state != SRV_ST_RUNNING &&
2637 srv_op_state != SRV_ST_STOPPING)) {
2638 chunk_appendf(msg, ", invalid srv_op_state value '%s'", params[1]);
2639 }
2640
2641 /* validating srv_admin_state */
2642 p = NULL;
2643 errno = 0;
2644 srv_admin_state = strtol(params[2], &p, 10);
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002645 fqdn_set_by_cli = !!(srv_admin_state & SRV_ADMF_HMAINT);
Willy Tarreau757478e2016-11-03 19:22:19 +01002646
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002647 /* inherited statuses will be recomputed later.
2648 * Also disable SRV_ADMF_HMAINT flag (set from stats socket fqdn).
2649 */
Christopher Fauletc6111032021-02-12 17:36:08 +01002650 srv_admin_state &= ~SRV_ADMF_IDRAIN & ~SRV_ADMF_IMAINT & ~SRV_ADMF_HMAINT & ~SRV_ADMF_RMAINT;
Willy Tarreau757478e2016-11-03 19:22:19 +01002651
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002652 if ((p == params[2]) || errno == EINVAL || errno == ERANGE ||
2653 (srv_admin_state != 0 &&
2654 srv_admin_state != SRV_ADMF_FMAINT &&
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002655 srv_admin_state != SRV_ADMF_CMAINT &&
2656 srv_admin_state != (SRV_ADMF_CMAINT | SRV_ADMF_FMAINT) &&
Willy Tarreaue1bde142016-11-03 18:33:25 +01002657 srv_admin_state != (SRV_ADMF_CMAINT | SRV_ADMF_FDRAIN) &&
Willy Tarreau757478e2016-11-03 19:22:19 +01002658 srv_admin_state != SRV_ADMF_FDRAIN)) {
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002659 chunk_appendf(msg, ", invalid srv_admin_state value '%s'", params[2]);
2660 }
2661
2662 /* validating srv_uweight */
2663 p = NULL;
2664 errno = 0;
2665 srv_uweight = strtol(params[3], &p, 10);
Willy Tarreaue1aebb22015-09-29 18:32:57 +02002666 if ((p == params[3]) || errno == EINVAL || errno == ERANGE || (srv_uweight > SRV_UWGHT_MAX))
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002667 chunk_appendf(msg, ", invalid srv_uweight value '%s'", params[3]);
2668
2669 /* validating srv_iweight */
2670 p = NULL;
2671 errno = 0;
2672 srv_iweight = strtol(params[4], &p, 10);
Willy Tarreaue1aebb22015-09-29 18:32:57 +02002673 if ((p == params[4]) || errno == EINVAL || errno == ERANGE || (srv_iweight > SRV_UWGHT_MAX))
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002674 chunk_appendf(msg, ", invalid srv_iweight value '%s'", params[4]);
2675
2676 /* validating srv_last_time_change */
2677 p = NULL;
2678 errno = 0;
2679 srv_last_time_change = strtol(params[5], &p, 10);
2680 if ((p == params[5]) || errno == EINVAL || errno == ERANGE)
2681 chunk_appendf(msg, ", invalid srv_last_time_change value '%s'", params[5]);
2682
2683 /* validating srv_check_status */
2684 p = NULL;
2685 errno = 0;
2686 srv_check_status = strtol(params[6], &p, 10);
2687 if (p == params[6] || errno == EINVAL || errno == ERANGE ||
2688 (srv_check_status >= HCHK_STATUS_SIZE))
2689 chunk_appendf(msg, ", invalid srv_check_status value '%s'", params[6]);
2690
2691 /* validating srv_check_result */
2692 p = NULL;
2693 errno = 0;
2694 srv_check_result = strtol(params[7], &p, 10);
2695 if ((p == params[7]) || errno == EINVAL || errno == ERANGE ||
2696 (srv_check_result != CHK_RES_UNKNOWN &&
2697 srv_check_result != CHK_RES_NEUTRAL &&
2698 srv_check_result != CHK_RES_FAILED &&
2699 srv_check_result != CHK_RES_PASSED &&
2700 srv_check_result != CHK_RES_CONDPASS)) {
2701 chunk_appendf(msg, ", invalid srv_check_result value '%s'", params[7]);
2702 }
2703
2704 /* validating srv_check_health */
2705 p = NULL;
2706 errno = 0;
2707 srv_check_health = strtol(params[8], &p, 10);
2708 if (p == params[8] || errno == EINVAL || errno == ERANGE)
2709 chunk_appendf(msg, ", invalid srv_check_health value '%s'", params[8]);
2710
2711 /* validating srv_check_state */
2712 p = NULL;
2713 errno = 0;
2714 srv_check_state = strtol(params[9], &p, 10);
2715 if (p == params[9] || errno == EINVAL || errno == ERANGE ||
2716 (srv_check_state & ~(CHK_ST_INPROGRESS | CHK_ST_CONFIGURED | CHK_ST_ENABLED | CHK_ST_PAUSED | CHK_ST_AGENT)))
2717 chunk_appendf(msg, ", invalid srv_check_state value '%s'", params[9]);
2718
2719 /* validating srv_agent_state */
2720 p = NULL;
2721 errno = 0;
2722 srv_agent_state = strtol(params[10], &p, 10);
2723 if (p == params[10] || errno == EINVAL || errno == ERANGE ||
2724 (srv_agent_state & ~(CHK_ST_INPROGRESS | CHK_ST_CONFIGURED | CHK_ST_ENABLED | CHK_ST_PAUSED | CHK_ST_AGENT)))
2725 chunk_appendf(msg, ", invalid srv_agent_state value '%s'", params[10]);
2726
2727 /* validating bk_f_forced_id */
2728 p = NULL;
2729 errno = 0;
2730 bk_f_forced_id = strtol(params[11], &p, 10);
2731 if (p == params[11] || errno == EINVAL || errno == ERANGE || !((bk_f_forced_id == 0) || (bk_f_forced_id == 1)))
2732 chunk_appendf(msg, ", invalid bk_f_forced_id value '%s'", params[11]);
2733
2734 /* validating srv_f_forced_id */
2735 p = NULL;
2736 errno = 0;
2737 srv_f_forced_id = strtol(params[12], &p, 10);
2738 if (p == params[12] || errno == EINVAL || errno == ERANGE || !((srv_f_forced_id == 0) || (srv_f_forced_id == 1)))
2739 chunk_appendf(msg, ", invalid srv_f_forced_id value '%s'", params[12]);
2740
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002741 /* validating srv_fqdn */
2742 fqdn = params[13];
2743 if (fqdn && *fqdn == '-')
2744 fqdn = NULL;
2745 if (fqdn && (strlen(fqdn) > DNS_MAX_NAME_SIZE || invalid_domainchar(fqdn))) {
2746 chunk_appendf(msg, ", invalid srv_fqdn value '%s'", params[13]);
2747 fqdn = NULL;
2748 }
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002749
Frédéric Lécaille31694712017-08-01 08:47:19 +02002750 port_str = params[14];
2751 if (port_str) {
2752 port = strl2uic(port_str, strlen(port_str));
2753 if (port > USHRT_MAX) {
2754 chunk_appendf(msg, ", invalid srv_port value '%s'", port_str);
2755 port_str = NULL;
2756 }
2757 }
2758
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02002759 /* SRV record
2760 * NOTE: in HAProxy, SRV records must start with an underscore '_'
2761 */
2762 srvrecord = params[15];
2763 if (srvrecord && *srvrecord != '_')
2764 srvrecord = NULL;
2765
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002766 /* don't apply anything if one error has been detected */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002767 if (msg->data)
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002768 goto out;
2769
Christopher Faulet2a944ee2017-11-07 10:42:54 +01002770 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002771 /* recover operational state and apply it to this server
2772 * and all servers tracking this one */
Jérôme Magninf57afa42019-01-20 11:27:40 +01002773 srv->check.health = srv_check_health;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002774 switch (srv_op_state) {
2775 case SRV_ST_STOPPED:
2776 srv->check.health = 0;
Emeric Brun5a133512017-10-19 14:42:30 +02002777 srv_set_stopped(srv, "changed from server-state after a reload", NULL);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002778 break;
2779 case SRV_ST_STARTING:
Jérôme Magninf57afa42019-01-20 11:27:40 +01002780 /* If rise == 1 there is no STARTING state, let's switch to
2781 * RUNNING
2782 */
2783 if (srv->check.rise == 1) {
2784 srv->check.health = srv->check.rise + srv->check.fall - 1;
2785 srv_set_running(srv, "", NULL);
2786 break;
2787 }
2788 if (srv->check.health < 1 || srv->check.health >= srv->check.rise)
2789 srv->check.health = srv->check.rise - 1;
Emeric Brun52a91d32017-08-31 14:41:55 +02002790 srv->next_state = srv_op_state;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002791 break;
2792 case SRV_ST_STOPPING:
Jérôme Magninf57afa42019-01-20 11:27:40 +01002793 /* If fall == 1 there is no STOPPING state, let's switch to
2794 * STOPPED
2795 */
2796 if (srv->check.fall == 1) {
2797 srv->check.health = 0;
2798 srv_set_stopped(srv, "changed from server-state after a reload", NULL);
2799 break;
2800 }
2801 if (srv->check.health < srv->check.rise ||
2802 srv->check.health > srv->check.rise + srv->check.fall - 2)
2803 srv->check.health = srv->check.rise;
Emeric Brun5a133512017-10-19 14:42:30 +02002804 srv_set_stopping(srv, "changed from server-state after a reload", NULL);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002805 break;
2806 case SRV_ST_RUNNING:
2807 srv->check.health = srv->check.rise + srv->check.fall - 1;
Emeric Brun5a133512017-10-19 14:42:30 +02002808 srv_set_running(srv, "", NULL);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002809 break;
2810 }
2811
2812 /* When applying server state, the following rules apply:
2813 * - in case of a configuration change, we apply the setting from the new
2814 * configuration, regardless of old running state
2815 * - if no configuration change, we apply old running state only if old running
2816 * state is different from new configuration state
2817 */
2818 /* configuration has changed */
Emeric Brun52a91d32017-08-31 14:41:55 +02002819 if ((srv_admin_state & SRV_ADMF_CMAINT) != (srv->next_admin & SRV_ADMF_CMAINT)) {
2820 if (srv->next_admin & SRV_ADMF_CMAINT)
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002821 srv_adm_set_maint(srv);
2822 else
2823 srv_adm_set_ready(srv);
2824 }
2825 /* configuration is the same, let's compate old running state and new conf state */
2826 else {
Emeric Brun52a91d32017-08-31 14:41:55 +02002827 if (srv_admin_state & SRV_ADMF_FMAINT && !(srv->next_admin & SRV_ADMF_CMAINT))
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002828 srv_adm_set_maint(srv);
Emeric Brun52a91d32017-08-31 14:41:55 +02002829 else if (!(srv_admin_state & SRV_ADMF_FMAINT) && (srv->next_admin & SRV_ADMF_CMAINT))
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002830 srv_adm_set_ready(srv);
2831 }
2832 /* apply drain mode if server is currently enabled */
Emeric Brun52a91d32017-08-31 14:41:55 +02002833 if (!(srv->next_admin & SRV_ADMF_FMAINT) && (srv_admin_state & SRV_ADMF_FDRAIN)) {
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002834 /* The SRV_ADMF_FDRAIN flag is inherited when srv->iweight is 0
Willy Tarreau22cace22016-11-03 18:19:49 +01002835 * (srv->iweight is the weight set up in configuration).
2836 * There are two possible reasons for FDRAIN to have been present :
2837 * - previous config weight was zero
2838 * - "set server b/s drain" was sent to the CLI
2839 *
2840 * In the first case, we simply want to drop this drain state
2841 * if the new weight is not zero anymore, meaning the administrator
2842 * has intentionally turned the weight back to a positive value to
2843 * enable the server again after an operation. In the second case,
2844 * the drain state was forced on the CLI regardless of the config's
2845 * weight so we don't want a change to the config weight to lose this
2846 * status. What this means is :
2847 * - if previous weight was 0 and new one is >0, drop the DRAIN state.
2848 * - if the previous weight was >0, keep it.
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002849 */
Willy Tarreau22cace22016-11-03 18:19:49 +01002850 if (srv_iweight > 0 || srv->iweight == 0)
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002851 srv_adm_set_drain(srv);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002852 }
2853
2854 srv->last_change = date.tv_sec - srv_last_time_change;
2855 srv->check.status = srv_check_status;
2856 srv->check.result = srv_check_result;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002857
2858 /* Only case we want to apply is removing ENABLED flag which could have been
2859 * done by the "disable health" command over the stats socket
2860 */
2861 if ((srv->check.state & CHK_ST_CONFIGURED) &&
2862 (srv_check_state & CHK_ST_CONFIGURED) &&
2863 !(srv_check_state & CHK_ST_ENABLED))
2864 srv->check.state &= ~CHK_ST_ENABLED;
2865
2866 /* Only case we want to apply is removing ENABLED flag which could have been
2867 * done by the "disable agent" command over the stats socket
2868 */
2869 if ((srv->agent.state & CHK_ST_CONFIGURED) &&
2870 (srv_agent_state & CHK_ST_CONFIGURED) &&
2871 !(srv_agent_state & CHK_ST_ENABLED))
2872 srv->agent.state &= ~CHK_ST_ENABLED;
2873
Baptiste Assmann6076d1c2015-09-17 22:53:59 +02002874 /* We want to apply the previous 'running' weight (srv_uweight) only if there
2875 * was no change in the configuration: both previous and new iweight are equals
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002876 *
Baptiste Assmann6076d1c2015-09-17 22:53:59 +02002877 * It means that a configuration file change has precedence over a unix socket change
2878 * for server's weight
2879 *
2880 * by default, HAProxy applies the following weight when parsing the configuration
2881 * srv->uweight = srv->iweight
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002882 */
Baptiste Assmann6076d1c2015-09-17 22:53:59 +02002883 if (srv_iweight == srv->iweight) {
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002884 srv->uweight = srv_uweight;
2885 }
Willy Tarreau3ff577e2018-08-02 11:48:52 +02002886 server_recalc_eweight(srv, 1);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002887
Willy Tarreaue5a60682016-11-09 14:54:53 +01002888 /* load server IP address */
Daniel Corbett9215ffa2018-05-19 19:43:24 -04002889 if (strcmp(params[0], "-"))
2890 srv->lastaddr = strdup(params[0]);
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002891
2892 if (fqdn && srv->hostname) {
2893 if (!strcmp(srv->hostname, fqdn)) {
2894 /* Here we reset the 'set from stats socket FQDN' flag
2895 * to support such transitions:
2896 * Let's say initial FQDN value is foo1 (in configuration file).
2897 * - FQDN changed from stats socket, from foo1 to foo2 value,
2898 * - FQDN changed again from file configuration (with the same previous value
2899 set from stats socket, from foo1 to foo2 value),
2900 * - reload for any other reason than a FQDN modification,
2901 * the configuration file FQDN matches the fqdn server state file value.
2902 * So we must reset the 'set from stats socket FQDN' flag to be consistent with
Joseph Herlant44466822018-11-15 08:57:51 -08002903 * any further FQDN modification.
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002904 */
Emeric Brun52a91d32017-08-31 14:41:55 +02002905 srv->next_admin &= ~SRV_ADMF_HMAINT;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002906 }
2907 else {
2908 /* If the FDQN has been changed from stats socket,
2909 * apply fqdn state file value (which is the value set
2910 * from stats socket).
Baptiste Assmann13a92322019-06-07 09:40:55 +02002911 * Also ensure the runtime resolver will process this resolution.
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002912 */
2913 if (fqdn_set_by_cli) {
Olivier Houchardd16bfe62017-10-31 15:21:19 +01002914 srv_set_fqdn(srv, fqdn, 0);
Baptiste Assmann13a92322019-06-07 09:40:55 +02002915 srv->flags &= ~SRV_F_NO_RESOLUTION;
Emeric Brun52a91d32017-08-31 14:41:55 +02002916 srv->next_admin |= SRV_ADMF_HMAINT;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002917 }
2918 }
2919 }
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02002920 /* If all the conditions below are validated, this means
2921 * we're evaluating a server managed by SRV resolution
2922 */
2923 else if (fqdn && !srv->hostname && srvrecord) {
2924 int res;
Emeric Brun32131d42021-06-11 10:48:45 +02002925 int i;
2926 char *tmp;
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02002927
2928 /* we can't apply previous state if SRV record has changed */
2929 if (srv->srvrq && strcmp(srv->srvrq->name, srvrecord) != 0) {
2930 chunk_appendf(msg, ", SRV record mismatch between configuration ('%s') and state file ('%s) for server '%s'. Previous state not applied", srv->srvrq->name, srvrecord, srv->id);
2931 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
2932 goto out;
2933 }
2934
2935 /* create or find a SRV resolution for this srv record */
2936 if (srv->srvrq == NULL && (srv->srvrq = find_srvrq_by_name(srvrecord, srv->proxy)) == NULL)
2937 srv->srvrq = new_dns_srvrq(srv, srvrecord);
2938 if (srv->srvrq == NULL) {
2939 chunk_appendf(msg, ", can't create or find SRV resolution '%s' for server '%s'", srvrecord, srv->id);
2940 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
2941 goto out;
2942 }
2943
2944 /* prepare DNS resolution for this server */
2945 res = srv_prepare_for_resolution(srv, fqdn);
2946 if (res == -1) {
2947 chunk_appendf(msg, ", can't allocate memory for DNS resolution for server '%s'", srv->id);
2948 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
2949 goto out;
2950 }
2951
2952 /* configure check.port accordingly */
2953 if ((srv->check.state & CHK_ST_CONFIGURED) &&
2954 !(srv->flags & SRV_F_CHECKPORT))
2955 srv->check.port = port;
2956
Emeric Brun32131d42021-06-11 10:48:45 +02002957 /* Remove from available list and insert in tree
2958 * since this server has an hostname
2959 */
2960 LIST_DEL_INIT(&srv->srv_rec_item);
2961 srv->host_dn.key = tmp = strdup(srv->hostname_dn);
2962
2963 /* convert the key in lowercase because tree
2964 * lookup is case sensitive but we don't care
2965 */
2966 for (i = 0; tmp[i]; i++)
2967 tmp[i] = tolower(tmp[i]);
2968
2969 /* insert in tree */
2970 ebis_insert(&srv->srvrq->named_servers, &srv->host_dn);
2971
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02002972 /* Unset SRV_F_MAPPORTS for SRV records.
2973 * SRV_F_MAPPORTS is unfortunately set by parse_server()
2974 * because no ports are provided in the configuration file.
2975 * This is because HAProxy will use the port found into the SRV record.
2976 */
2977 srv->flags &= ~SRV_F_MAPPORTS;
2978 }
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002979
Frédéric Lécaille31694712017-08-01 08:47:19 +02002980 if (port_str)
2981 srv->svc_port = port;
Christopher Faulet2a944ee2017-11-07 10:42:54 +01002982 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Frédéric Lécaille31694712017-08-01 08:47:19 +02002983
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002984 break;
2985 default:
2986 chunk_appendf(msg, ", version '%d' not supported", version);
2987 }
2988
2989 out:
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002990 if (msg->data) {
Baptiste Assmann0821bb92016-01-21 00:20:50 +01002991 chunk_appendf(msg, "\n");
Christopher Faulet767a84b2017-11-24 16:50:31 +01002992 ha_warning("server-state application failed for server '%s/%s'%s",
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002993 srv->proxy->id, srv->id, msg->area);
Baptiste Assmann0821bb92016-01-21 00:20:50 +01002994 }
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02002995}
2996
Baptiste Assmannda29fe22019-06-13 13:24:29 +02002997
2998/*
2999 * read next line from file <f> and return the server state version if one found.
3000 * If no version is found, then 0 is returned
3001 * Note that this should be the first read on <f>
3002 */
3003static int srv_state_get_version(FILE *f) {
3004 char buf[2];
3005 int ret;
3006
3007 /* first character of first line of the file must contain the version of the export */
3008 if (fgets(buf, 2, f) == NULL) {
3009 return 0;
3010 }
3011
3012 ret = atoi(buf);
3013 if ((ret < SRV_STATE_FILE_VERSION_MIN) ||
3014 (ret > SRV_STATE_FILE_VERSION_MAX))
3015 return 0;
3016
3017 return ret;
3018}
3019
3020
3021/*
3022 * parses server state line stored in <buf> and supposedly in version <version>.
3023 * Set <params> and <srv_params> accordingly.
3024 * In case of error, params[0] is set to NULL.
3025 */
3026static void srv_state_parse_line(char *buf, const int version, char **params, char **srv_params)
3027{
3028 int buflen, arg, srv_arg;
3029 char *cur, *end;
3030
3031 buflen = strlen(buf);
3032 cur = buf;
3033 end = cur + buflen;
3034
3035 /* we need at least one character */
3036 if (buflen == 0) {
3037 params[0] = NULL;
3038 return;
3039 }
3040
3041 /* ignore blank characters at the beginning of the line */
Willy Tarreau90807112020-02-25 08:16:33 +01003042 while (isspace((unsigned char)*cur))
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003043 ++cur;
3044
3045 /* Ignore empty or commented lines */
3046 if (cur == end || *cur == '#') {
3047 params[0] = NULL;
3048 return;
3049 }
3050
3051 /* truncated lines */
3052 if (buf[buflen - 1] != '\n') {
3053 //ha_warning("server-state file '%s': truncated line\n", filepath);
3054 params[0] = NULL;
3055 return;
3056 }
3057
3058 /* Removes trailing '\n' */
3059 buf[buflen - 1] = '\0';
3060
3061 /* we're now ready to move the line into *srv_params[] */
Christopher Fauletd119e562021-02-19 16:47:11 +01003062 memset(params, 0, SRV_STATE_FILE_MAX_FIELDS * sizeof(*params));
3063 memset(srv_params, 0, SRV_STATE_FILE_MAX_FIELDS * sizeof(*srv_params));
Christopher Faulet8c5b9742021-02-19 16:57:20 +01003064
3065 arg = 0;
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003066 srv_arg = 0;
3067 while (*cur && arg < SRV_STATE_FILE_MAX_FIELDS) {
Christopher Faulet8c5b9742021-02-19 16:57:20 +01003068 /* Search begining of the current field */
3069 while (isspace((unsigned char)*cur)) {
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003070 ++cur;
Christopher Faulet8c5b9742021-02-19 16:57:20 +01003071 if (!*cur)
3072 goto end;
3073 }
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003074
Christopher Faulet8c5b9742021-02-19 16:57:20 +01003075 /* v1
3076 * srv_addr: params[4] => srv_params[0]
3077 * srv_op_state: params[5] => srv_params[1]
3078 * srv_admin_state: params[6] => srv_params[2]
3079 * srv_uweight: params[7] => srv_params[3]
3080 * srv_iweight: params[8] => srv_params[4]
3081 * srv_last_time_change: params[9] => srv_params[5]
3082 * srv_check_status: params[10] => srv_params[6]
3083 * srv_check_result: params[11] => srv_params[7]
3084 * srv_check_health: params[12] => srv_params[8]
3085 * srv_check_state: params[13] => srv_params[9]
3086 * srv_agent_state: params[14] => srv_params[10]
3087 * bk_f_forced_id: params[15] => srv_params[11]
3088 * srv_f_forced_id: params[16] => srv_params[12]
3089 * srv_fqdn: params[17] => srv_params[13]
3090 * srv_port: params[18] => srv_params[14]
3091 * srvrecord: params[19] => srv_params[15]
3092 */
3093 if (version == 1 && arg >= 4) {
3094 srv_params[srv_arg] = cur;
3095 ++srv_arg;
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003096 }
Christopher Faulet8c5b9742021-02-19 16:57:20 +01003097 params[arg] = cur;
3098 ++arg;
3099
3100 /* Search end of the current field: first space or \0 */
3101 /* Search begining of the current field */
3102 while (!isspace((unsigned char)*cur)) {
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003103 ++cur;
Christopher Faulet8c5b9742021-02-19 16:57:20 +01003104 if (!*cur)
3105 goto end;
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003106 }
Christopher Faulet8c5b9742021-02-19 16:57:20 +01003107 *cur++ = '\0';
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003108 }
3109
Christopher Faulet8c5b9742021-02-19 16:57:20 +01003110 end:
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003111 /* if line is incomplete line, then ignore it.
3112 * otherwise, update useful flags */
3113 switch (version) {
3114 case 1:
3115 if (arg < SRV_STATE_FILE_NB_FIELDS_VERSION_1) {
3116 params[0] = NULL;
3117 return;
3118 }
3119 break;
3120 }
3121
3122 return;
3123}
3124
3125
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003126/* This function parses all the proxies and only take care of the backends (since we're looking for server)
3127 * For each proxy, it does the following:
3128 * - opens its server state file (either one or local one)
3129 * - read whole file, line by line
3130 * - analyse each line to check if it matches our current backend:
3131 * - backend name matches
3132 * - backend id matches if id is forced and name doesn't match
3133 * - if the server pointed by the line is found, then state is applied
3134 *
3135 * If the running backend uuid or id differs from the state file, then HAProxy reports
3136 * a warning.
Willy Tarreau46b7f532018-08-21 11:54:26 +02003137 *
3138 * Grabs the server's lock via srv_update_state().
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003139 */
3140void apply_server_state(void)
3141{
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003142 char mybuf[SRV_STATE_LINE_MAXLEN];
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003143 char *params[SRV_STATE_FILE_MAX_FIELDS] = {0};
3144 char *srv_params[SRV_STATE_FILE_MAX_FIELDS] = {0};
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003145 int version, global_file_version;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003146 FILE *f;
3147 char *filepath;
3148 char globalfilepath[MAXPATHLEN + 1];
3149 char localfilepath[MAXPATHLEN + 1];
3150 int len, fileopenerr, globalfilepathlen, localfilepathlen;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003151 struct proxy *curproxy, *bk;
3152 struct server *srv;
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003153 char *line;
3154 char *bkname, *srvname;
3155 struct state_line *st;
3156 struct ebmb_node *node, *next_node;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003157
Willy Tarreau2d067f92020-07-16 06:40:27 +02003158 f = NULL;
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003159 global_file_version = 0;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003160 globalfilepathlen = 0;
3161 /* create the globalfilepath variable */
3162 if (global.server_state_file) {
3163 /* absolute path or no base directory provided */
3164 if ((global.server_state_file[0] == '/') || (!global.server_state_base)) {
3165 len = strlen(global.server_state_file);
3166 if (len > MAXPATHLEN) {
3167 globalfilepathlen = 0;
3168 goto globalfileerror;
3169 }
3170 memcpy(globalfilepath, global.server_state_file, len);
3171 globalfilepath[len] = '\0';
3172 globalfilepathlen = len;
3173 }
3174 else if (global.server_state_base) {
3175 len = strlen(global.server_state_base);
Willy Tarreau5dfb6c42018-10-16 19:26:12 +02003176 if (len > MAXPATHLEN) {
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003177 globalfilepathlen = 0;
3178 goto globalfileerror;
3179 }
Olivier Houchard17f8b902018-10-16 18:35:01 +02003180 memcpy(globalfilepath, global.server_state_base, len);
Willy Tarreau5dfb6c42018-10-16 19:26:12 +02003181 globalfilepath[len] = 0;
3182 globalfilepathlen = len;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003183
3184 /* append a slash if needed */
3185 if (!globalfilepathlen || globalfilepath[globalfilepathlen - 1] != '/') {
3186 if (globalfilepathlen + 1 > MAXPATHLEN) {
3187 globalfilepathlen = 0;
3188 goto globalfileerror;
3189 }
3190 globalfilepath[globalfilepathlen++] = '/';
3191 }
3192
3193 len = strlen(global.server_state_file);
3194 if (globalfilepathlen + len > MAXPATHLEN) {
3195 globalfilepathlen = 0;
3196 goto globalfileerror;
3197 }
3198 memcpy(globalfilepath + globalfilepathlen, global.server_state_file, len);
3199 globalfilepathlen += len;
3200 globalfilepath[globalfilepathlen++] = 0;
3201 }
3202 }
3203 globalfileerror:
3204 if (globalfilepathlen == 0)
3205 globalfilepath[0] = '\0';
3206
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003207 /* Load global server state in a tree */
3208 if (globalfilepathlen > 0) {
3209 errno = 0;
3210 f = fopen(globalfilepath, "r");
3211 if (errno)
3212 ha_warning("Can't open global server state file '%s': %s\n", globalfilepath, strerror(errno));
Vedran Furac5d486272019-10-16 14:49:38 +02003213 if (!f)
3214 goto out_load_server_state_in_tree;
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003215
3216 global_file_version = srv_state_get_version(f);
3217 if (global_file_version == 0)
3218 goto out_load_server_state_in_tree;
3219
3220 while (fgets(mybuf, SRV_STATE_LINE_MAXLEN, f)) {
3221 line = NULL;
3222
3223 line = strdup(mybuf);
3224 if (line == NULL)
3225 continue;
3226
3227 srv_state_parse_line(mybuf, global_file_version, params, srv_params);
3228 if (params[0] == NULL)
Willy Tarreauca7a5af2019-12-20 17:26:27 +01003229 goto nextline;
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003230
3231 /* bkname */
3232 bkname = params[1];
3233 /* srvname */
3234 srvname = params[3];
3235
3236 /* key */
3237 chunk_printf(&trash, "%s %s", bkname, srvname);
3238
3239 /* store line in tree */
Willy Tarreau7d6a1fa2019-12-20 17:18:13 +01003240 st = calloc(1, sizeof(*st) + trash.data + 1);
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003241 if (st == NULL) {
3242 goto nextline;
3243 }
Willy Tarreau7d6a1fa2019-12-20 17:18:13 +01003244 memcpy(st->name_name.key, trash.area, trash.data + 1);
Willy Tarreaufd1aa012019-12-20 17:23:40 +01003245 if (ebst_insert(&state_file, &st->name_name) != &st->name_name) {
3246 /* this is a duplicate key, probably a hand-crafted file,
3247 * drop it!
3248 */
3249 goto nextline;
3250 }
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003251
3252 /* save line */
3253 st->line = line;
3254
3255 continue;
3256
3257 nextline:
3258 /* free up memory in case of error during the processing of the line */
3259 free(line);
3260 }
3261 }
3262 out_load_server_state_in_tree:
3263
Ilya Shipitsindc6e8a92020-07-16 02:02:40 +05003264 if (f) {
3265 fclose(f);
3266 f = NULL;
3267 }
3268
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003269 /* parse all proxies and load states form tree (global file) or from local file */
Olivier Houchardfbc74e82017-11-24 16:54:05 +01003270 for (curproxy = proxies_list; curproxy != NULL; curproxy = curproxy->next) {
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003271 /* servers are only in backends */
3272 if (!(curproxy->cap & PR_CAP_BE))
3273 continue;
3274 fileopenerr = 0;
3275 filepath = NULL;
3276
3277 /* search server state file path and name */
3278 switch (curproxy->load_server_state_from_file) {
3279 /* read servers state from global file */
3280 case PR_SRV_STATE_FILE_GLOBAL:
3281 /* there was an error while generating global server state file path */
3282 if (globalfilepathlen == 0)
3283 continue;
3284 filepath = globalfilepath;
3285 fileopenerr = 1;
3286 break;
3287 /* this backend has its own file */
3288 case PR_SRV_STATE_FILE_LOCAL:
3289 localfilepathlen = 0;
3290 localfilepath[0] = '\0';
3291 len = 0;
3292 /* create the localfilepath variable */
3293 /* absolute path or no base directory provided */
3294 if ((curproxy->server_state_file_name[0] == '/') || (!global.server_state_base)) {
3295 len = strlen(curproxy->server_state_file_name);
3296 if (len > MAXPATHLEN) {
3297 localfilepathlen = 0;
3298 goto localfileerror;
3299 }
3300 memcpy(localfilepath, curproxy->server_state_file_name, len);
3301 localfilepath[len] = '\0';
3302 localfilepathlen = len;
3303 }
3304 else if (global.server_state_base) {
3305 len = strlen(global.server_state_base);
3306 localfilepathlen += len;
3307
3308 if (localfilepathlen > MAXPATHLEN) {
3309 localfilepathlen = 0;
3310 goto localfileerror;
3311 }
Olivier Houchard17f8b902018-10-16 18:35:01 +02003312 memcpy(localfilepath, global.server_state_base, len);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003313 localfilepath[localfilepathlen] = 0;
3314
3315 /* append a slash if needed */
3316 if (!localfilepathlen || localfilepath[localfilepathlen - 1] != '/') {
3317 if (localfilepathlen + 1 > MAXPATHLEN) {
3318 localfilepathlen = 0;
3319 goto localfileerror;
3320 }
3321 localfilepath[localfilepathlen++] = '/';
3322 }
3323
3324 len = strlen(curproxy->server_state_file_name);
3325 if (localfilepathlen + len > MAXPATHLEN) {
3326 localfilepathlen = 0;
3327 goto localfileerror;
3328 }
3329 memcpy(localfilepath + localfilepathlen, curproxy->server_state_file_name, len);
3330 localfilepathlen += len;
3331 localfilepath[localfilepathlen++] = 0;
3332 }
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003333 localfileerror:
3334 if (localfilepathlen == 0)
Christopher Fauletacef6b92021-02-12 16:31:03 +01003335 continue;
3336 filepath = localfilepath;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003337
3338 break;
3339 case PR_SRV_STATE_FILE_NONE:
3340 default:
3341 continue;
3342 }
3343
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003344 /* when global file is used, we get data from the tree
3345 * Note that in such case we don't check backend name neither uuid.
3346 * Backend name can't be wrong since it's used as a key to retrieve the server state
3347 * line from the tree.
3348 */
3349 if (curproxy->load_server_state_from_file == PR_SRV_STATE_FILE_GLOBAL) {
3350 struct server *srv = curproxy->srv;
3351 while (srv) {
3352 struct ebmb_node *node;
3353 struct state_line *st;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003354
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003355 chunk_printf(&trash, "%s %s", curproxy->id, srv->id);
3356 node = ebst_lookup(&state_file, trash.area);
3357 if (!node)
3358 goto next;
Dragan Dosencf4fb032015-11-04 23:03:26 +01003359
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003360 st = container_of(node, struct state_line, name_name);
3361 memcpy(mybuf, st->line, strlen(st->line));
3362 mybuf[strlen(st->line)] = 0;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003363
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003364 srv_state_parse_line(mybuf, global_file_version, params, srv_params);
3365 if (params[0] == NULL)
3366 goto next;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003367
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003368 srv_update_state(srv, global_file_version, srv_params);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003369
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003370 next:
3371 srv = srv->next;
3372 }
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003373
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003374 continue; /* next proxy in list */
3375 }
3376 else {
3377 /* load 'local' state file */
3378 errno = 0;
3379 f = fopen(filepath, "r");
3380 if (errno && fileopenerr)
3381 ha_warning("Can't open server state file '%s': %s\n", filepath, strerror(errno));
3382 if (!f)
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003383 continue;
3384
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003385 mybuf[0] = '\0';
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003386
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003387 /* first character of first line of the file must contain the version of the export */
3388 version = srv_state_get_version(f);
3389 if (version == 0) {
3390 ha_warning("Can't get version of the server state file '%s'\n", filepath);
3391 goto fileclose;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003392 }
3393
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003394 while (fgets(mybuf, SRV_STATE_LINE_MAXLEN, f)) {
3395 int bk_f_forced_id = 0;
3396 int check_id = 0;
3397 int check_name = 0;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003398
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003399 srv_state_parse_line(mybuf, version, params, srv_params);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003400
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003401 if (params[0] == NULL) {
3402 continue;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003403 }
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003404
3405 /* if line is incomplete line, then ignore it.
3406 * otherwise, update useful flags */
3407 switch (version) {
3408 case 1:
3409 bk_f_forced_id = (atoi(params[15]) & PR_O_FORCED_ID);
3410 check_id = (atoi(params[0]) == curproxy->uuid);
3411 check_name = (strcmp(curproxy->id, params[1]) == 0);
3412 break;
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003413 }
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003414
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003415 bk = curproxy;
3416
3417 /* if backend can't be found, let's continue */
3418 if (!check_id && !check_name)
3419 continue;
3420 else if (!check_id && check_name) {
3421 ha_warning("backend ID mismatch: from server state file: '%s', from running config '%d'\n", params[0], bk->uuid);
3422 send_log(bk, LOG_NOTICE, "backend ID mismatch: from server state file: '%s', from running config '%d'\n", params[0], bk->uuid);
3423 }
3424 else if (check_id && !check_name) {
3425 ha_warning("backend name mismatch: from server state file: '%s', from running config '%s'\n", params[1], bk->id);
3426 send_log(bk, LOG_NOTICE, "backend name mismatch: from server state file: '%s', from running config '%s'\n", params[1], bk->id);
3427 /* if name doesn't match, we still want to update curproxy if the backend id
3428 * was forced in previous the previous configuration */
3429 if (!bk_f_forced_id)
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003430 continue;
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003431 }
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003432
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003433 /* look for the server by its name: param[3] */
3434 srv = server_find_best_match(bk, params[3], 0, NULL);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003435
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003436 if (!srv) {
3437 /* if no server found, then warning and continue with next line */
3438 ha_warning("can't find server '%s' in backend '%s'\n",
3439 params[3], params[1]);
3440 send_log(bk, LOG_NOTICE, "can't find server '%s' in backend '%s'\n",
3441 params[3], params[1]);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003442 continue;
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003443 }
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003444
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003445 /* now we can proceed with server's state update */
3446 srv_update_state(srv, version, srv_params);
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003447 }
Ilya Shipitsindc6e8a92020-07-16 02:02:40 +05003448
3449 fileclose:
3450 fclose(f);
3451
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003452 }
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003453 }
Baptiste Assmannda29fe22019-06-13 13:24:29 +02003454
3455 /* now free memory allocated for the tree */
3456 for (node = ebmb_first(&state_file), next_node = node ? ebmb_next(node) : NULL;
3457 node;
3458 node = next_node, next_node = node ? ebmb_next(node) : NULL) {
3459 st = container_of(node, struct state_line, name_name);
3460 ebmb_delete(&st->name_name);
3461 free(st->line);
3462 free(st);
3463 }
3464
Baptiste Assmanne11cfcd2015-08-19 16:44:03 +02003465}
3466
Simon Horman7d09b9a2013-02-12 10:45:51 +09003467/*
Baptiste Assmann14e40142015-04-14 01:13:07 +02003468 * update a server's current IP address.
3469 * ip is a pointer to the new IP address, whose address family is ip_sin_family.
3470 * ip is in network format.
3471 * updater is a string which contains an information about the requester of the update.
3472 * updater is used if not NULL.
3473 *
3474 * A log line and a stderr warning message is generated based on server's backend options.
Willy Tarreau46b7f532018-08-21 11:54:26 +02003475 *
3476 * Must be called with the server lock held.
Baptiste Assmann14e40142015-04-14 01:13:07 +02003477 */
Thierry Fournierd35b7a62016-02-24 08:23:22 +01003478int update_server_addr(struct server *s, void *ip, int ip_sin_family, const char *updater)
Baptiste Assmann14e40142015-04-14 01:13:07 +02003479{
Christopher Fauletd6c6b5f2020-09-08 10:27:24 +02003480 /* save the new IP family & address if necessary */
3481 switch (ip_sin_family) {
3482 case AF_INET:
3483 if (s->addr.ss_family == ip_sin_family &&
3484 !memcmp(ip, &((struct sockaddr_in *)&s->addr)->sin_addr.s_addr, 4))
3485 return 0;
3486 break;
3487 case AF_INET6:
3488 if (s->addr.ss_family == ip_sin_family &&
3489 !memcmp(ip, &((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr, 16))
3490 return 0;
3491 break;
3492 };
3493
Baptiste Assmann14e40142015-04-14 01:13:07 +02003494 /* generates a log line and a warning on stderr */
3495 if (1) {
3496 /* book enough space for both IPv4 and IPv6 */
3497 char oldip[INET6_ADDRSTRLEN];
3498 char newip[INET6_ADDRSTRLEN];
3499
3500 memset(oldip, '\0', INET6_ADDRSTRLEN);
3501 memset(newip, '\0', INET6_ADDRSTRLEN);
3502
3503 /* copy old IP address in a string */
3504 switch (s->addr.ss_family) {
3505 case AF_INET:
3506 inet_ntop(s->addr.ss_family, &((struct sockaddr_in *)&s->addr)->sin_addr, oldip, INET_ADDRSTRLEN);
3507 break;
3508 case AF_INET6:
3509 inet_ntop(s->addr.ss_family, &((struct sockaddr_in6 *)&s->addr)->sin6_addr, oldip, INET6_ADDRSTRLEN);
3510 break;
Christopher Fauletb0b76072020-09-08 10:38:40 +02003511 default:
3512 strcpy(oldip, "(none)");
3513 break;
Baptiste Assmann14e40142015-04-14 01:13:07 +02003514 };
3515
3516 /* copy new IP address in a string */
3517 switch (ip_sin_family) {
3518 case AF_INET:
3519 inet_ntop(ip_sin_family, ip, newip, INET_ADDRSTRLEN);
3520 break;
3521 case AF_INET6:
3522 inet_ntop(ip_sin_family, ip, newip, INET6_ADDRSTRLEN);
3523 break;
3524 };
3525
3526 /* save log line into a buffer */
3527 chunk_printf(&trash, "%s/%s changed its IP from %s to %s by %s",
3528 s->proxy->id, s->id, oldip, newip, updater);
3529
3530 /* write the buffer on stderr */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003531 ha_warning("%s.\n", trash.area);
Baptiste Assmann14e40142015-04-14 01:13:07 +02003532
3533 /* send a log */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003534 send_log(s->proxy, LOG_NOTICE, "%s.\n", trash.area);
Baptiste Assmann14e40142015-04-14 01:13:07 +02003535 }
3536
3537 /* save the new IP family */
3538 s->addr.ss_family = ip_sin_family;
3539 /* save the new IP address */
3540 switch (ip_sin_family) {
3541 case AF_INET:
Willy Tarreaueec1d382016-07-13 11:59:39 +02003542 memcpy(&((struct sockaddr_in *)&s->addr)->sin_addr.s_addr, ip, 4);
Baptiste Assmann14e40142015-04-14 01:13:07 +02003543 break;
3544 case AF_INET6:
3545 memcpy(((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr, ip, 16);
3546 break;
3547 };
Olivier Houchard4e694042017-03-14 20:01:29 +01003548 srv_set_dyncookie(s);
Baptiste Assmann14e40142015-04-14 01:13:07 +02003549
3550 return 0;
3551}
3552
3553/*
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003554 * This function update a server's addr and port only for AF_INET and AF_INET6 families.
3555 *
3556 * Caller can pass its name through <updater> to get it integrated in the response message
3557 * returned by the function.
3558 *
3559 * The function first does the following, in that order:
3560 * - validates the new addr and/or port
3561 * - checks if an update is required (new IP or port is different than current ones)
3562 * - checks the update is allowed:
3563 * - don't switch from/to a family other than AF_INET4 and AF_INET6
3564 * - allow all changes if no CHECKS are configured
3565 * - if CHECK is configured:
3566 * - if switch to port map (SRV_F_MAPPORTS), ensure health check have their own ports
3567 * - applies required changes to both ADDR and PORT if both 'required' and 'allowed'
3568 * conditions are met
Willy Tarreau46b7f532018-08-21 11:54:26 +02003569 *
3570 * Must be called with the server lock held.
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003571 */
3572const char *update_server_addr_port(struct server *s, const char *addr, const char *port, char *updater)
3573{
3574 struct sockaddr_storage sa;
3575 int ret, port_change_required;
3576 char current_addr[INET6_ADDRSTRLEN];
David Carlier327298c2016-11-20 10:42:38 +00003577 uint16_t current_port, new_port;
Willy Tarreau83061a82018-07-13 11:56:34 +02003578 struct buffer *msg;
Olivier Houchard4e694042017-03-14 20:01:29 +01003579 int changed = 0;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003580
3581 msg = get_trash_chunk();
3582 chunk_reset(msg);
3583
3584 if (addr) {
3585 memset(&sa, 0, sizeof(struct sockaddr_storage));
3586 if (str2ip2(addr, &sa, 0) == NULL) {
3587 chunk_printf(msg, "Invalid addr '%s'", addr);
3588 goto out;
3589 }
3590
3591 /* changes are allowed on AF_INET* families only */
3592 if ((sa.ss_family != AF_INET) && (sa.ss_family != AF_INET6)) {
3593 chunk_printf(msg, "Update to families other than AF_INET and AF_INET6 supported only through configuration file");
3594 goto out;
3595 }
3596
3597 /* collecting data currently setup */
3598 memset(current_addr, '\0', sizeof(current_addr));
3599 ret = addr_to_str(&s->addr, current_addr, sizeof(current_addr));
3600 /* changes are allowed on AF_INET* families only */
3601 if ((ret != AF_INET) && (ret != AF_INET6)) {
3602 chunk_printf(msg, "Update for the current server address family is only supported through configuration file");
3603 goto out;
3604 }
3605
3606 /* applying ADDR changes if required and allowed
3607 * ipcmp returns 0 when both ADDR are the same
3608 */
3609 if (ipcmp(&s->addr, &sa) == 0) {
3610 chunk_appendf(msg, "no need to change the addr");
3611 goto port;
3612 }
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003613 ipcpy(&sa, &s->addr);
Olivier Houchard4e694042017-03-14 20:01:29 +01003614 changed = 1;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003615
3616 /* we also need to update check's ADDR only if it uses the server's one */
3617 if ((s->check.state & CHK_ST_CONFIGURED) && (s->flags & SRV_F_CHECKADDR)) {
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003618 ipcpy(&sa, &s->check.addr);
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003619 }
3620
3621 /* we also need to update agent ADDR only if it use the server's one */
3622 if ((s->agent.state & CHK_ST_CONFIGURED) && (s->flags & SRV_F_AGENTADDR)) {
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003623 ipcpy(&sa, &s->agent.addr);
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003624 }
3625
3626 /* update report for caller */
3627 chunk_printf(msg, "IP changed from '%s' to '%s'", current_addr, addr);
3628 }
3629
3630 port:
3631 if (port) {
3632 char sign = '\0';
3633 char *endptr;
3634
3635 if (addr)
3636 chunk_appendf(msg, ", ");
3637
3638 /* collecting data currently setup */
Willy Tarreau04276f32017-01-06 17:41:29 +01003639 current_port = s->svc_port;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003640
3641 /* check if PORT change is required */
3642 port_change_required = 0;
3643
3644 sign = *port;
Ryabin Sergey77ee7522017-01-11 19:39:55 +04003645 errno = 0;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003646 new_port = strtol(port, &endptr, 10);
3647 if ((errno != 0) || (port == endptr)) {
3648 chunk_appendf(msg, "problem converting port '%s' to an int", port);
3649 goto out;
3650 }
3651
3652 /* check if caller triggers a port mapped or offset */
3653 if (sign == '-' || (sign == '+')) {
3654 /* check if server currently uses port map */
3655 if (!(s->flags & SRV_F_MAPPORTS)) {
3656 /* switch from fixed port to port map mandatorily triggers
3657 * a port change */
3658 port_change_required = 1;
3659 /* check is configured
3660 * we're switching from a fixed port to a SRV_F_MAPPORTS (mapped) port
3661 * prevent PORT change if check doesn't have it's dedicated port while switching
3662 * to port mapping */
3663 if ((s->check.state & CHK_ST_CONFIGURED) && !(s->flags & SRV_F_CHECKPORT)) {
3664 chunk_appendf(msg, "can't change <port> to port map because it is incompatible with current health check port configuration (use 'port' statement from the 'server' directive.");
3665 goto out;
3666 }
3667 }
3668 /* we're already using port maps */
3669 else {
3670 port_change_required = current_port != new_port;
3671 }
3672 }
3673 /* fixed port */
3674 else {
3675 port_change_required = current_port != new_port;
3676 }
3677
3678 /* applying PORT changes if required and update response message */
3679 if (port_change_required) {
3680 /* apply new port */
Willy Tarreau04276f32017-01-06 17:41:29 +01003681 s->svc_port = new_port;
Olivier Houchard4e694042017-03-14 20:01:29 +01003682 changed = 1;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003683
3684 /* prepare message */
3685 chunk_appendf(msg, "port changed from '");
3686 if (s->flags & SRV_F_MAPPORTS)
3687 chunk_appendf(msg, "+");
3688 chunk_appendf(msg, "%d' to '", current_port);
3689
3690 if (sign == '-') {
3691 s->flags |= SRV_F_MAPPORTS;
3692 chunk_appendf(msg, "%c", sign);
3693 /* just use for result output */
3694 new_port = -new_port;
3695 }
3696 else if (sign == '+') {
3697 s->flags |= SRV_F_MAPPORTS;
3698 chunk_appendf(msg, "%c", sign);
3699 }
3700 else {
3701 s->flags &= ~SRV_F_MAPPORTS;
3702 }
3703
3704 chunk_appendf(msg, "%d'", new_port);
3705
3706 /* we also need to update health checks port only if it uses server's realport */
3707 if ((s->check.state & CHK_ST_CONFIGURED) && !(s->flags & SRV_F_CHECKPORT)) {
3708 s->check.port = new_port;
3709 }
3710 }
3711 else {
3712 chunk_appendf(msg, "no need to change the port");
3713 }
3714 }
3715
3716out:
William Dauchy6318d332020-05-02 21:52:36 +02003717 if (changed) {
3718 /* force connection cleanup on the given server */
3719 srv_cleanup_connections(s);
Olivier Houchard4e694042017-03-14 20:01:29 +01003720 srv_set_dyncookie(s);
William Dauchy6318d332020-05-02 21:52:36 +02003721 }
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003722 if (updater)
3723 chunk_appendf(msg, " by '%s'", updater);
3724 chunk_appendf(msg, "\n");
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003725 return msg->area;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003726}
3727
Christopher Faulet6d703682021-03-11 18:03:21 +01003728/*
3729 * update server status based on result of SRV resolution
3730 * returns:
3731 * 0 if server status is updated
3732 * 1 if server status has not changed
3733 *
3734 * Must be called with the server lock held.
3735 */
3736int srvrq_update_srv_status(struct server *s, int has_no_ip)
3737{
3738 if (!s->srvrq)
3739 return 1;
3740
3741 /* since this server has an IP, it can go back in production */
3742 if (has_no_ip == 0) {
3743 srv_clr_admin_flag(s, SRV_ADMF_RMAINT);
3744 return 1;
3745 }
3746
3747 if (s->next_admin & SRV_ADMF_RMAINT)
3748 return 1;
3749
3750 srv_set_admin_flag(s, SRV_ADMF_RMAINT, "entry removed from SRV record");
3751 return 0;
3752}
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003753
3754/*
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003755 * update server status based on result of name resolution
3756 * returns:
3757 * 0 if server status is updated
3758 * 1 if server status has not changed
Willy Tarreau46b7f532018-08-21 11:54:26 +02003759 *
3760 * Must be called with the server lock held.
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003761 */
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003762int snr_update_srv_status(struct server *s, int has_no_ip)
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003763{
Christopher Faulet67957bd2017-09-27 11:00:59 +02003764 struct dns_resolvers *resolvers = s->resolvers;
Christopher Faulet55810262021-03-12 10:23:05 +01003765 struct dns_resolution *resolution = (s->dns_requester ? s->dns_requester->resolution : NULL);
Christopher Faulet67957bd2017-09-27 11:00:59 +02003766 int exp;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003767
Jerome Magnin012261a2020-07-28 13:38:22 +02003768 /* If resolution is NULL we're dealing with SRV records Additional records */
Christopher Faulet6d703682021-03-11 18:03:21 +01003769 if (resolution == NULL)
3770 return srvrq_update_srv_status(s, has_no_ip);
Jerome Magnin012261a2020-07-28 13:38:22 +02003771
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003772 switch (resolution->status) {
3773 case RSLV_STATUS_NONE:
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003774 /* status when HAProxy has just (re)started.
3775 * Nothing to do, since the task is already automatically started */
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003776 break;
3777
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003778 case RSLV_STATUS_VALID:
3779 /*
3780 * resume health checks
3781 * server will be turned back on if health check is safe
3782 */
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003783 if (has_no_ip) {
Emeric Brun52a91d32017-08-31 14:41:55 +02003784 if (s->next_admin & SRV_ADMF_RMAINT)
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003785 return 1;
3786 srv_set_admin_flag(s, SRV_ADMF_RMAINT,
3787 "No IP for server ");
Christopher Faulet67957bd2017-09-27 11:00:59 +02003788 return 0;
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003789 }
Christopher Faulet67957bd2017-09-27 11:00:59 +02003790
Emeric Brun52a91d32017-08-31 14:41:55 +02003791 if (!(s->next_admin & SRV_ADMF_RMAINT))
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003792 return 1;
3793 srv_clr_admin_flag(s, SRV_ADMF_RMAINT);
3794 chunk_printf(&trash, "Server %s/%s administratively READY thanks to valid DNS answer",
3795 s->proxy->id, s->id);
3796
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003797 ha_warning("%s.\n", trash.area);
3798 send_log(s->proxy, LOG_NOTICE, "%s.\n", trash.area);
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003799 return 0;
3800
3801 case RSLV_STATUS_NX:
3802 /* stop server if resolution is NX for a long enough period */
Christopher Faulet67957bd2017-09-27 11:00:59 +02003803 exp = tick_add(resolution->last_valid, resolvers->hold.nx);
3804 if (!tick_is_expired(exp, now_ms))
3805 break;
3806
3807 if (s->next_admin & SRV_ADMF_RMAINT)
3808 return 1;
3809 srv_set_admin_flag(s, SRV_ADMF_RMAINT, "DNS NX status");
3810 return 0;
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003811
3812 case RSLV_STATUS_TIMEOUT:
3813 /* stop server if resolution is TIMEOUT for a long enough period */
Christopher Faulet67957bd2017-09-27 11:00:59 +02003814 exp = tick_add(resolution->last_valid, resolvers->hold.timeout);
3815 if (!tick_is_expired(exp, now_ms))
3816 break;
3817
3818 if (s->next_admin & SRV_ADMF_RMAINT)
3819 return 1;
3820 srv_set_admin_flag(s, SRV_ADMF_RMAINT, "DNS timeout status");
3821 return 0;
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003822
3823 case RSLV_STATUS_REFUSED:
3824 /* stop server if resolution is REFUSED for a long enough period */
Christopher Faulet67957bd2017-09-27 11:00:59 +02003825 exp = tick_add(resolution->last_valid, resolvers->hold.refused);
3826 if (!tick_is_expired(exp, now_ms))
3827 break;
3828
3829 if (s->next_admin & SRV_ADMF_RMAINT)
3830 return 1;
3831 srv_set_admin_flag(s, SRV_ADMF_RMAINT, "DNS refused status");
3832 return 0;
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003833
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003834 default:
Christopher Faulet67957bd2017-09-27 11:00:59 +02003835 /* stop server if resolution failed for a long enough period */
3836 exp = tick_add(resolution->last_valid, resolvers->hold.other);
3837 if (!tick_is_expired(exp, now_ms))
3838 break;
3839
3840 if (s->next_admin & SRV_ADMF_RMAINT)
3841 return 1;
3842 srv_set_admin_flag(s, SRV_ADMF_RMAINT, "unspecified DNS error");
3843 return 0;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003844 }
3845
3846 return 1;
3847}
3848
3849/*
3850 * Server Name Resolution valid response callback
3851 * It expects:
3852 * - <nameserver>: the name server which answered the valid response
3853 * - <response>: buffer containing a valid DNS response
3854 * - <response_len>: size of <response>
3855 * It performs the following actions:
3856 * - ignore response if current ip found and server family not met
3857 * - update with first new ip found if family is met and current IP is not found
3858 * returns:
3859 * 0 on error
3860 * 1 when no error or safe ignore
Olivier Houchard28381072017-11-06 17:30:28 +01003861 *
3862 * Must be called with server lock held
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003863 */
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003864int snr_resolution_cb(struct dns_requester *requester, struct dns_nameserver *nameserver)
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003865{
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003866 struct server *s = NULL;
3867 struct dns_resolution *resolution = NULL;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003868 void *serverip, *firstip;
3869 short server_sin_family, firstip_sin_family;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003870 int ret;
Willy Tarreau83061a82018-07-13 11:56:34 +02003871 struct buffer *chk = get_trash_chunk();
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003872 int has_no_ip = 0;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003873
Christopher Faulet67957bd2017-09-27 11:00:59 +02003874 s = objt_server(requester->owner);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003875 if (!s)
3876 return 1;
3877
Christopher Fauletdb001942021-03-10 15:07:27 +01003878 if (s->srvrq) {
Emeric Brun32131d42021-06-11 10:48:45 +02003879 /* If DNS resolution is disabled ignore it.
3880 * This is the case if the server was associated to
3881 * a SRV record and this record is now expired.
Christopher Fauletdb001942021-03-10 15:07:27 +01003882 */
Emeric Brun32131d42021-06-11 10:48:45 +02003883 if (s->flags & SRV_F_NO_RESOLUTION)
Christopher Fauletdb001942021-03-10 15:07:27 +01003884 return 1;
3885 }
3886
Christopher Faulet55810262021-03-12 10:23:05 +01003887 resolution = (s->dns_requester ? s->dns_requester->resolution : NULL);
Christopher Fauletdb001942021-03-10 15:07:27 +01003888 if (!resolution)
3889 return 1;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003890
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003891 /* initializing variables */
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003892 firstip = NULL; /* pointer to the first valid response found */
3893 /* it will be used as the new IP if a change is required */
3894 firstip_sin_family = AF_UNSPEC;
3895 serverip = NULL; /* current server IP address */
3896
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003897 /* initializing server IP pointer */
3898 server_sin_family = s->addr.ss_family;
3899 switch (server_sin_family) {
3900 case AF_INET:
3901 serverip = &((struct sockaddr_in *)&s->addr)->sin_addr.s_addr;
3902 break;
3903
3904 case AF_INET6:
3905 serverip = &((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr;
3906 break;
3907
Willy Tarreau3acfcd12017-01-06 19:18:32 +01003908 case AF_UNSPEC:
3909 break;
3910
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003911 default:
3912 goto invalid;
3913 }
3914
Baptiste Assmann729c9012017-05-22 15:13:10 +02003915 ret = dns_get_ip_from_response(&resolution->response, &s->dns_opts,
Thierry Fournierada34842016-02-17 21:25:09 +01003916 serverip, server_sin_family, &firstip,
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003917 &firstip_sin_family, s);
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003918
3919 switch (ret) {
3920 case DNS_UPD_NO:
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003921 goto update_status;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003922
3923 case DNS_UPD_SRVIP_NOT_FOUND:
3924 goto save_ip;
3925
3926 case DNS_UPD_CNAME:
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003927 goto invalid;
3928
Baptiste Assmann0453a1d2015-09-09 00:51:08 +02003929 case DNS_UPD_NO_IP_FOUND:
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003930 has_no_ip = 1;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003931 goto update_status;
Baptiste Assmann0453a1d2015-09-09 00:51:08 +02003932
Baptiste Assmannfad03182015-10-28 02:03:32 +01003933 case DNS_UPD_NAME_ERROR:
Baptiste Assmannfad03182015-10-28 02:03:32 +01003934 /* update resolution status to OTHER error type */
Christopher Faulet67957bd2017-09-27 11:00:59 +02003935 resolution->status = RSLV_STATUS_OTHER;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003936 goto update_status;
Baptiste Assmannfad03182015-10-28 02:03:32 +01003937
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003938 default:
3939 goto invalid;
3940
3941 }
3942
3943 save_ip:
Christopher Faulet67957bd2017-09-27 11:00:59 +02003944 if (nameserver) {
Amaury Denoyellefbd0bc92020-10-05 11:49:46 +02003945 nameserver->counters->update++;
Christopher Faulet67957bd2017-09-27 11:00:59 +02003946 /* save the first ip we found */
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003947 chunk_printf(chk, "%s/%s", nameserver->resolvers->id, nameserver->id);
Christopher Faulet67957bd2017-09-27 11:00:59 +02003948 }
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003949 else
3950 chunk_printf(chk, "DNS cache");
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003951 update_server_addr(s, firstip, firstip_sin_family, (char *) chk->area);
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003952
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003953 update_status:
Christopher Fauletdb001942021-03-10 15:07:27 +01003954
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003955 snr_update_srv_status(s, has_no_ip);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003956 return 1;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003957
3958 invalid:
Christopher Faulet3bbd65b2017-09-15 11:55:45 +02003959 if (nameserver) {
Amaury Denoyellefbd0bc92020-10-05 11:49:46 +02003960 nameserver->counters->invalid++;
Christopher Faulet67957bd2017-09-27 11:00:59 +02003961 goto update_status;
Christopher Faulet3bbd65b2017-09-15 11:55:45 +02003962 }
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003963 snr_update_srv_status(s, has_no_ip);
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003964 return 0;
3965}
3966
3967/*
Baptiste Assmann826060e2020-11-19 22:38:33 +01003968 * SRV record error management callback
3969 * returns:
Emeric Bruna8b60f22021-06-10 15:25:25 +02003970 * 0 if we can trash answser items.
3971 * 1 when safely ignored and we must kept answer items
Baptiste Assmann826060e2020-11-19 22:38:33 +01003972 *
3973 * Grabs the server's lock.
3974 */
3975int srvrq_resolution_error_cb(struct dns_requester *requester, int error_code)
3976{
Baptiste Assmann826060e2020-11-19 22:38:33 +01003977 struct dns_srvrq *srvrq;
3978 struct dns_resolution *res;
3979 struct dns_resolvers *resolvers;
3980 int exp;
3981
3982 /* SRV records */
3983 srvrq = objt_dns_srvrq(requester->owner);
3984 if (!srvrq)
Emeric Bruna8b60f22021-06-10 15:25:25 +02003985 return 0;
Baptiste Assmann826060e2020-11-19 22:38:33 +01003986
3987 resolvers = srvrq->resolvers;
3988 res = requester->resolution;
3989
3990 switch (res->status) {
3991
3992 case RSLV_STATUS_NX:
3993 /* stop server if resolution is NX for a long enough period */
3994 exp = tick_add(res->last_valid, resolvers->hold.nx);
3995 if (!tick_is_expired(exp, now_ms))
3996 return 1;
3997 break;
3998
3999 case RSLV_STATUS_TIMEOUT:
4000 /* stop server if resolution is TIMEOUT for a long enough period */
4001 exp = tick_add(res->last_valid, resolvers->hold.timeout);
4002 if (!tick_is_expired(exp, now_ms))
4003 return 1;
4004 break;
4005
4006 case RSLV_STATUS_REFUSED:
4007 /* stop server if resolution is REFUSED for a long enough period */
4008 exp = tick_add(res->last_valid, resolvers->hold.refused);
4009 if (!tick_is_expired(exp, now_ms))
4010 return 1;
4011 break;
4012
4013 default:
4014 /* stop server if resolution failed for a long enough period */
4015 exp = tick_add(res->last_valid, resolvers->hold.other);
4016 if (!tick_is_expired(exp, now_ms))
4017 return 1;
4018 }
4019
Emeric Brun32131d42021-06-11 10:48:45 +02004020 /* Remove any associated server ref */
4021 dns_detach_from_resolution_answer_items(res, requester, 1);
Baptiste Assmann826060e2020-11-19 22:38:33 +01004022
Emeric Bruna8b60f22021-06-10 15:25:25 +02004023 return 0;
Baptiste Assmann826060e2020-11-19 22:38:33 +01004024}
4025
4026/*
Baptiste Assmanna68ca962015-04-14 01:15:08 +02004027 * Server Name Resolution error management callback
4028 * returns:
Emeric Bruna8b60f22021-06-10 15:25:25 +02004029 * 0 if we can trash answser items.
4030 * 1 when safely ignored and we must kept answer items
Willy Tarreau46b7f532018-08-21 11:54:26 +02004031 *
4032 * Grabs the server's lock.
Baptiste Assmanna68ca962015-04-14 01:15:08 +02004033 */
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004034int snr_resolution_error_cb(struct dns_requester *requester, int error_code)
Baptiste Assmanna68ca962015-04-14 01:15:08 +02004035{
Christopher Faulet67957bd2017-09-27 11:00:59 +02004036 struct server *s;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02004037
Christopher Faulet67957bd2017-09-27 11:00:59 +02004038 s = objt_server(requester->owner);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004039 if (!s)
Emeric Bruna8b60f22021-06-10 15:25:25 +02004040 return 0;
4041
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004042 HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
Emeric Bruna8b60f22021-06-10 15:25:25 +02004043 if (!snr_update_srv_status(s, 1)) {
Christopher Faulet7c9201e2021-03-10 20:31:40 +01004044 memset(&s->addr, 0, sizeof(s->addr));
Emeric Bruna8b60f22021-06-10 15:25:25 +02004045 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
Emeric Brun32131d42021-06-11 10:48:45 +02004046 dns_detach_from_resolution_answer_items(requester->resolution, requester, 1);
Emeric Bruna8b60f22021-06-10 15:25:25 +02004047 return 0;
4048 }
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004049 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
Emeric Bruna8b60f22021-06-10 15:25:25 +02004050
Baptiste Assmanna68ca962015-04-14 01:15:08 +02004051 return 1;
4052}
4053
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02004054/*
4055 * Function to check if <ip> is already affected to a server in the backend
Olivier Houcharda8c6db82017-07-06 18:46:47 +02004056 * which owns <srv> and is up.
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02004057 * It returns a pointer to the first server found or NULL if <ip> is not yet
4058 * assigned.
Olivier Houchard28381072017-11-06 17:30:28 +01004059 *
4060 * Must be called with server lock held
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02004061 */
4062struct server *snr_check_ip_callback(struct server *srv, void *ip, unsigned char *ip_family)
4063{
4064 struct server *tmpsrv;
4065 struct proxy *be;
4066
4067 if (!srv)
4068 return NULL;
4069
4070 be = srv->proxy;
4071 for (tmpsrv = be->srv; tmpsrv; tmpsrv = tmpsrv->next) {
Emeric Brune9fd6b52017-11-02 17:20:39 +01004072 /* we found the current server is the same, ignore it */
4073 if (srv == tmpsrv)
4074 continue;
4075
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02004076 /* We want to compare the IP in the record with the IP of the servers in the
4077 * same backend, only if:
4078 * * DNS resolution is enabled on the server
4079 * * the hostname used for the resolution by our server is the same than the
4080 * one used for the server found in the backend
4081 * * the server found in the backend is not our current server
4082 */
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004083 HA_SPIN_LOCK(SERVER_LOCK, &tmpsrv->lock);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004084 if ((tmpsrv->hostname_dn == NULL) ||
4085 (srv->hostname_dn_len != tmpsrv->hostname_dn_len) ||
Christopher Fauletd31f6942021-03-16 11:21:04 +01004086 (strcasecmp(srv->hostname_dn, tmpsrv->hostname_dn) != 0) ||
Emeric Brune9fd6b52017-11-02 17:20:39 +01004087 (srv->puid == tmpsrv->puid)) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004088 HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02004089 continue;
Emeric Brune9fd6b52017-11-02 17:20:39 +01004090 }
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02004091
Olivier Houcharda8c6db82017-07-06 18:46:47 +02004092 /* If the server has been taken down, don't consider it */
Emeric Brune9fd6b52017-11-02 17:20:39 +01004093 if (tmpsrv->next_admin & SRV_ADMF_RMAINT) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004094 HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
Olivier Houcharda8c6db82017-07-06 18:46:47 +02004095 continue;
Emeric Brune9fd6b52017-11-02 17:20:39 +01004096 }
Olivier Houcharda8c6db82017-07-06 18:46:47 +02004097
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02004098 /* At this point, we have 2 different servers using the same DNS hostname
4099 * for their respective resolution.
4100 */
4101 if (*ip_family == tmpsrv->addr.ss_family &&
4102 ((tmpsrv->addr.ss_family == AF_INET &&
4103 memcmp(ip, &((struct sockaddr_in *)&tmpsrv->addr)->sin_addr, 4) == 0) ||
4104 (tmpsrv->addr.ss_family == AF_INET6 &&
4105 memcmp(ip, &((struct sockaddr_in6 *)&tmpsrv->addr)->sin6_addr, 16) == 0))) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004106 HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02004107 return tmpsrv;
4108 }
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004109 HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02004110 }
4111
Emeric Brune9fd6b52017-11-02 17:20:39 +01004112
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02004113 return NULL;
4114}
4115
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004116/* Sets the server's address (srv->addr) from srv->hostname using the libc's
4117 * resolver. This is suited for initial address configuration. Returns 0 on
4118 * success otherwise a non-zero error code. In case of error, *err_code, if
4119 * not NULL, is filled up.
4120 */
4121int srv_set_addr_via_libc(struct server *srv, int *err_code)
4122{
4123 if (str2ip2(srv->hostname, &srv->addr, 1) == NULL) {
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004124 if (err_code)
Willy Tarreau465b6e52016-11-07 19:19:22 +01004125 *err_code |= ERR_WARN;
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004126 return 1;
4127 }
4128 return 0;
4129}
4130
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004131/* Set the server's FDQN (->hostname) from <hostname>.
4132 * Returns -1 if failed, 0 if not.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004133 *
4134 * Must be called with the server lock held.
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004135 */
Olivier Houchardd16bfe62017-10-31 15:21:19 +01004136int srv_set_fqdn(struct server *srv, const char *hostname, int dns_locked)
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004137{
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004138 struct dns_resolution *resolution;
Christopher Faulet67957bd2017-09-27 11:00:59 +02004139 char *hostname_dn;
4140 int hostname_len, hostname_dn_len;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004141
Frédéric Lécaille5afb3cf2018-08-21 15:04:23 +02004142 /* Note that the server lock is already held. */
4143 if (!srv->resolvers)
4144 return -1;
4145
Olivier Houchardd16bfe62017-10-31 15:21:19 +01004146 if (!dns_locked)
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004147 HA_SPIN_LOCK(DNS_LOCK, &srv->resolvers->lock);
Christopher Faulet55810262021-03-12 10:23:05 +01004148 /* run time DNS/SRV resolution was not active for this server
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004149 * and we can't enable it at run time for now.
4150 */
Christopher Faulet55810262021-03-12 10:23:05 +01004151 if (!srv->dns_requester && !srv->srvrq)
Christopher Fauletb2812a62017-10-04 16:17:58 +02004152 goto err;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004153
4154 chunk_reset(&trash);
Christopher Faulet67957bd2017-09-27 11:00:59 +02004155 hostname_len = strlen(hostname);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004156 hostname_dn = trash.area;
Christopher Faulet67957bd2017-09-27 11:00:59 +02004157 hostname_dn_len = dns_str_to_dn_label(hostname, hostname_len + 1,
4158 hostname_dn, trash.size);
4159 if (hostname_dn_len == -1)
Christopher Fauletb2812a62017-10-04 16:17:58 +02004160 goto err;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004161
Christopher Faulet55810262021-03-12 10:23:05 +01004162 resolution = (srv->dns_requester ? srv->dns_requester->resolution : NULL);
Christopher Faulet67957bd2017-09-27 11:00:59 +02004163 if (resolution &&
4164 resolution->hostname_dn &&
Christopher Fauletd31f6942021-03-16 11:21:04 +01004165 resolution->hostname_dn_len == hostname_dn_len &&
4166 strcasecmp(resolution->hostname_dn, hostname_dn) == 0)
Christopher Fauletb2812a62017-10-04 16:17:58 +02004167 goto end;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004168
Christopher Faulet119ec522021-03-11 18:09:53 +01004169 dns_unlink_resolution(srv->dns_requester, 0);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004170
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004171 free(srv->hostname);
4172 free(srv->hostname_dn);
Christopher Faulet67957bd2017-09-27 11:00:59 +02004173 srv->hostname = strdup(hostname);
4174 srv->hostname_dn = strdup(hostname_dn);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004175 srv->hostname_dn_len = hostname_dn_len;
4176 if (!srv->hostname || !srv->hostname_dn)
Christopher Fauletb2812a62017-10-04 16:17:58 +02004177 goto err;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004178
Baptiste Assmann13a92322019-06-07 09:40:55 +02004179 if (srv->flags & SRV_F_NO_RESOLUTION)
4180 goto end;
4181
Olivier Houchard55dcdf42017-11-06 15:15:04 +01004182 if (dns_link_resolution(srv, OBJ_TYPE_SERVER, 1) == -1)
Christopher Fauletb2812a62017-10-04 16:17:58 +02004183 goto err;
4184
4185 end:
Olivier Houchardd16bfe62017-10-31 15:21:19 +01004186 if (!dns_locked)
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004187 HA_SPIN_UNLOCK(DNS_LOCK, &srv->resolvers->lock);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02004188 return 0;
Christopher Fauletb2812a62017-10-04 16:17:58 +02004189
4190 err:
Olivier Houchardd16bfe62017-10-31 15:21:19 +01004191 if (!dns_locked)
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004192 HA_SPIN_UNLOCK(DNS_LOCK, &srv->resolvers->lock);
Christopher Fauletb2812a62017-10-04 16:17:58 +02004193 return -1;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004194}
4195
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004196/* Sets the server's address (srv->addr) from srv->lastaddr which was filled
4197 * from the state file. This is suited for initial address configuration.
4198 * Returns 0 on success otherwise a non-zero error code. In case of error,
4199 * *err_code, if not NULL, is filled up.
4200 */
4201static int srv_apply_lastaddr(struct server *srv, int *err_code)
4202{
4203 if (!str2ip2(srv->lastaddr, &srv->addr, 0)) {
4204 if (err_code)
4205 *err_code |= ERR_WARN;
4206 return 1;
4207 }
4208 return 0;
4209}
4210
Willy Tarreau25e51522016-11-04 15:10:17 +01004211/* returns 0 if no error, otherwise a combination of ERR_* flags */
4212static int srv_iterate_initaddr(struct server *srv)
4213{
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01004214 char *name = srv->hostname;
Willy Tarreau25e51522016-11-04 15:10:17 +01004215 int return_code = 0;
4216 int err_code;
4217 unsigned int methods;
4218
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01004219 /* If no addr and no hostname set, get the name from the DNS SRV request */
4220 if (!name && srv->srvrq)
4221 name = srv->srvrq->name;
4222
Willy Tarreau25e51522016-11-04 15:10:17 +01004223 methods = srv->init_addr_methods;
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01004224 if (!methods) {
4225 /* otherwise default to "last,libc" */
Willy Tarreau25e51522016-11-04 15:10:17 +01004226 srv_append_initaddr(&methods, SRV_IADDR_LAST);
4227 srv_append_initaddr(&methods, SRV_IADDR_LIBC);
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01004228 if (srv->resolvers_id) {
4229 /* dns resolution is configured, add "none" to not fail on startup */
4230 srv_append_initaddr(&methods, SRV_IADDR_NONE);
4231 }
Willy Tarreau25e51522016-11-04 15:10:17 +01004232 }
4233
Willy Tarreau3eed10e2016-11-07 21:03:16 +01004234 /* "-dr" : always append "none" so that server addresses resolution
4235 * failures are silently ignored, this is convenient to validate some
4236 * configs out of their environment.
4237 */
4238 if (global.tune.options & GTUNE_RESOLVE_DONTFAIL)
4239 srv_append_initaddr(&methods, SRV_IADDR_NONE);
4240
Willy Tarreau25e51522016-11-04 15:10:17 +01004241 while (methods) {
4242 err_code = 0;
4243 switch (srv_get_next_initaddr(&methods)) {
4244 case SRV_IADDR_LAST:
4245 if (!srv->lastaddr)
4246 continue;
4247 if (srv_apply_lastaddr(srv, &err_code) == 0)
Olivier Houchard4e694042017-03-14 20:01:29 +01004248 goto out;
Willy Tarreau25e51522016-11-04 15:10:17 +01004249 return_code |= err_code;
4250 break;
4251
4252 case SRV_IADDR_LIBC:
4253 if (!srv->hostname)
4254 continue;
4255 if (srv_set_addr_via_libc(srv, &err_code) == 0)
Olivier Houchard4e694042017-03-14 20:01:29 +01004256 goto out;
Willy Tarreau25e51522016-11-04 15:10:17 +01004257 return_code |= err_code;
4258 break;
4259
Willy Tarreau37ebe122016-11-04 15:17:58 +01004260 case SRV_IADDR_NONE:
4261 srv_set_admin_flag(srv, SRV_ADMF_RMAINT, NULL);
Willy Tarreau465b6e52016-11-07 19:19:22 +01004262 if (return_code) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01004263 ha_warning("parsing [%s:%d] : 'server %s' : could not resolve address '%s', disabling server.\n",
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01004264 srv->conf.file, srv->conf.line, srv->id, name);
Willy Tarreau465b6e52016-11-07 19:19:22 +01004265 }
Willy Tarreau37ebe122016-11-04 15:17:58 +01004266 return return_code;
4267
Willy Tarreau4310d362016-11-02 15:05:56 +01004268 case SRV_IADDR_IP:
4269 ipcpy(&srv->init_addr, &srv->addr);
4270 if (return_code) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01004271 ha_warning("parsing [%s:%d] : 'server %s' : could not resolve address '%s', falling back to configured address.\n",
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01004272 srv->conf.file, srv->conf.line, srv->id, name);
Willy Tarreau4310d362016-11-02 15:05:56 +01004273 }
Olivier Houchard4e694042017-03-14 20:01:29 +01004274 goto out;
Willy Tarreau4310d362016-11-02 15:05:56 +01004275
Willy Tarreau25e51522016-11-04 15:10:17 +01004276 default: /* unhandled method */
4277 break;
4278 }
4279 }
4280
4281 if (!return_code) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01004282 ha_alert("parsing [%s:%d] : 'server %s' : no method found to resolve address '%s'\n",
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01004283 srv->conf.file, srv->conf.line, srv->id, name);
Willy Tarreau25e51522016-11-04 15:10:17 +01004284 }
Willy Tarreau465b6e52016-11-07 19:19:22 +01004285 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01004286 ha_alert("parsing [%s:%d] : 'server %s' : could not resolve address '%s'.\n",
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01004287 srv->conf.file, srv->conf.line, srv->id, name);
Willy Tarreau465b6e52016-11-07 19:19:22 +01004288 }
Willy Tarreau25e51522016-11-04 15:10:17 +01004289
4290 return_code |= ERR_ALERT | ERR_FATAL;
4291 return return_code;
Olivier Houchard4e694042017-03-14 20:01:29 +01004292out:
4293 srv_set_dyncookie(srv);
4294 return return_code;
Willy Tarreau25e51522016-11-04 15:10:17 +01004295}
4296
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004297/*
4298 * This function parses all backends and all servers within each backend
4299 * and performs servers' addr resolution based on information provided by:
4300 * - configuration file
4301 * - server-state file (states provided by an 'old' haproxy process)
4302 *
4303 * Returns 0 if no error, otherwise, a combination of ERR_ flags.
4304 */
4305int srv_init_addr(void)
4306{
4307 struct proxy *curproxy;
4308 int return_code = 0;
4309
Olivier Houchardfbc74e82017-11-24 16:54:05 +01004310 curproxy = proxies_list;
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004311 while (curproxy) {
4312 struct server *srv;
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004313
4314 /* servers are in backend only */
Amaury Denoyelle96a4ff12021-01-06 14:28:50 +01004315 if (!(curproxy->cap & PR_CAP_BE) || curproxy->disabled)
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004316 goto srv_init_addr_next;
4317
Willy Tarreau25e51522016-11-04 15:10:17 +01004318 for (srv = curproxy->srv; srv; srv = srv->next)
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01004319 if (srv->hostname || srv->srvrq)
Willy Tarreau3d609a72017-09-06 14:22:45 +02004320 return_code |= srv_iterate_initaddr(srv);
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004321
4322 srv_init_addr_next:
4323 curproxy = curproxy->next;
4324 }
4325
4326 return return_code;
4327}
4328
Willy Tarreau46b7f532018-08-21 11:54:26 +02004329/*
4330 * Must be called with the server lock held.
4331 */
Olivier Houchardd16bfe62017-10-31 15:21:19 +01004332const char *update_server_fqdn(struct server *server, const char *fqdn, const char *updater, int dns_locked)
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004333{
4334
Willy Tarreau83061a82018-07-13 11:56:34 +02004335 struct buffer *msg;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004336
4337 msg = get_trash_chunk();
4338 chunk_reset(msg);
4339
Olivier Houchard8da5f982017-08-04 18:35:36 +02004340 if (server->hostname && !strcmp(fqdn, server->hostname)) {
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004341 chunk_appendf(msg, "no need to change the FDQN");
4342 goto out;
4343 }
4344
4345 if (strlen(fqdn) > DNS_MAX_NAME_SIZE || invalid_domainchar(fqdn)) {
4346 chunk_appendf(msg, "invalid fqdn '%s'", fqdn);
4347 goto out;
4348 }
4349
4350 chunk_appendf(msg, "%s/%s changed its FQDN from %s to %s",
4351 server->proxy->id, server->id, server->hostname, fqdn);
4352
Olivier Houchardd16bfe62017-10-31 15:21:19 +01004353 if (srv_set_fqdn(server, fqdn, dns_locked) < 0) {
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004354 chunk_reset(msg);
4355 chunk_appendf(msg, "could not update %s/%s FQDN",
4356 server->proxy->id, server->id);
4357 goto out;
4358 }
4359
4360 /* Flag as FQDN set from stats socket. */
Emeric Brun52a91d32017-08-31 14:41:55 +02004361 server->next_admin |= SRV_ADMF_HMAINT;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004362
4363 out:
4364 if (updater)
4365 chunk_appendf(msg, " by '%s'", updater);
4366 chunk_appendf(msg, "\n");
4367
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004368 return msg->area;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004369}
4370
4371
Willy Tarreau21b069d2016-11-23 17:15:08 +01004372/* Expects to find a backend and a server in <arg> under the form <backend>/<server>,
4373 * and returns the pointer to the server. Otherwise, display adequate error messages
Willy Tarreau3b6e5472016-11-24 15:53:53 +01004374 * on the CLI, sets the CLI's state to CLI_ST_PRINT and returns NULL. This is only
Willy Tarreau21b069d2016-11-23 17:15:08 +01004375 * used for CLI commands requiring a server name.
4376 * Important: the <arg> is modified to remove the '/'.
4377 */
4378struct server *cli_find_server(struct appctx *appctx, char *arg)
4379{
4380 struct proxy *px;
4381 struct server *sv;
4382 char *line;
4383
4384 /* split "backend/server" and make <line> point to server */
4385 for (line = arg; *line; line++)
4386 if (*line == '/') {
4387 *line++ = '\0';
4388 break;
4389 }
4390
4391 if (!*line || !*arg) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004392 cli_err(appctx, "Require 'backend/server'.\n");
Willy Tarreau21b069d2016-11-23 17:15:08 +01004393 return NULL;
4394 }
4395
4396 if (!get_backend_server(arg, line, &px, &sv)) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004397 cli_err(appctx, px ? "No such server.\n" : "No such backend.\n");
Willy Tarreau21b069d2016-11-23 17:15:08 +01004398 return NULL;
4399 }
4400
Willy Tarreauc3914d42020-09-24 08:39:22 +02004401 if (px->disabled) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004402 cli_err(appctx, "Proxy is disabled.\n");
Willy Tarreau21b069d2016-11-23 17:15:08 +01004403 return NULL;
4404 }
4405
4406 return sv;
4407}
4408
William Lallemand222baf22016-11-19 02:00:33 +01004409
Willy Tarreau46b7f532018-08-21 11:54:26 +02004410/* grabs the server lock */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004411static int cli_parse_set_server(char **args, char *payload, struct appctx *appctx, void *private)
William Lallemand222baf22016-11-19 02:00:33 +01004412{
4413 struct server *sv;
4414 const char *warning;
4415
4416 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4417 return 1;
4418
4419 sv = cli_find_server(appctx, args[2]);
4420 if (!sv)
4421 return 1;
4422
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004423 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02004424
William Lallemand222baf22016-11-19 02:00:33 +01004425 if (strcmp(args[3], "weight") == 0) {
4426 warning = server_parse_weight_change_request(sv, args[4]);
Willy Tarreau9d008692019-08-09 11:21:01 +02004427 if (warning)
4428 cli_err(appctx, warning);
William Lallemand222baf22016-11-19 02:00:33 +01004429 }
4430 else if (strcmp(args[3], "state") == 0) {
4431 if (strcmp(args[4], "ready") == 0)
4432 srv_adm_set_ready(sv);
4433 else if (strcmp(args[4], "drain") == 0)
4434 srv_adm_set_drain(sv);
4435 else if (strcmp(args[4], "maint") == 0)
4436 srv_adm_set_maint(sv);
Willy Tarreau9d008692019-08-09 11:21:01 +02004437 else
4438 cli_err(appctx, "'set server <srv> state' expects 'ready', 'drain' and 'maint'.\n");
William Lallemand222baf22016-11-19 02:00:33 +01004439 }
4440 else if (strcmp(args[3], "health") == 0) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004441 if (sv->track)
4442 cli_err(appctx, "cannot change health on a tracking server.\n");
William Lallemand222baf22016-11-19 02:00:33 +01004443 else if (strcmp(args[4], "up") == 0) {
4444 sv->check.health = sv->check.rise + sv->check.fall - 1;
Emeric Brun5a133512017-10-19 14:42:30 +02004445 srv_set_running(sv, "changed from CLI", NULL);
William Lallemand222baf22016-11-19 02:00:33 +01004446 }
4447 else if (strcmp(args[4], "stopping") == 0) {
4448 sv->check.health = sv->check.rise + sv->check.fall - 1;
Emeric Brun5a133512017-10-19 14:42:30 +02004449 srv_set_stopping(sv, "changed from CLI", NULL);
William Lallemand222baf22016-11-19 02:00:33 +01004450 }
4451 else if (strcmp(args[4], "down") == 0) {
4452 sv->check.health = 0;
Emeric Brun5a133512017-10-19 14:42:30 +02004453 srv_set_stopped(sv, "changed from CLI", NULL);
William Lallemand222baf22016-11-19 02:00:33 +01004454 }
Willy Tarreau9d008692019-08-09 11:21:01 +02004455 else
4456 cli_err(appctx, "'set server <srv> health' expects 'up', 'stopping', or 'down'.\n");
William Lallemand222baf22016-11-19 02:00:33 +01004457 }
4458 else if (strcmp(args[3], "agent") == 0) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004459 if (!(sv->agent.state & CHK_ST_ENABLED))
4460 cli_err(appctx, "agent checks are not enabled on this server.\n");
William Lallemand222baf22016-11-19 02:00:33 +01004461 else if (strcmp(args[4], "up") == 0) {
4462 sv->agent.health = sv->agent.rise + sv->agent.fall - 1;
Emeric Brun5a133512017-10-19 14:42:30 +02004463 srv_set_running(sv, "changed from CLI", NULL);
William Lallemand222baf22016-11-19 02:00:33 +01004464 }
4465 else if (strcmp(args[4], "down") == 0) {
4466 sv->agent.health = 0;
Emeric Brun5a133512017-10-19 14:42:30 +02004467 srv_set_stopped(sv, "changed from CLI", NULL);
William Lallemand222baf22016-11-19 02:00:33 +01004468 }
Willy Tarreau9d008692019-08-09 11:21:01 +02004469 else
4470 cli_err(appctx, "'set server <srv> agent' expects 'up' or 'down'.\n");
William Lallemand222baf22016-11-19 02:00:33 +01004471 }
Misiek2da082d2017-01-09 09:40:42 +01004472 else if (strcmp(args[3], "agent-addr") == 0) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004473 if (!(sv->agent.state & CHK_ST_ENABLED))
4474 cli_err(appctx, "agent checks are not enabled on this server.\n");
4475 else if (str2ip(args[4], &sv->agent.addr) == NULL)
4476 cli_err(appctx, "incorrect addr address given for agent.\n");
Misiek2da082d2017-01-09 09:40:42 +01004477 }
4478 else if (strcmp(args[3], "agent-send") == 0) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004479 if (!(sv->agent.state & CHK_ST_ENABLED))
4480 cli_err(appctx, "agent checks are not enabled on this server.\n");
4481 else {
Christopher Faulet0ae3d1d2020-04-06 17:54:24 +02004482 if (!set_srv_agent_send(sv, args[4]))
Willy Tarreau9d008692019-08-09 11:21:01 +02004483 cli_err(appctx, "cannot allocate memory for new string.\n");
Misiek2da082d2017-01-09 09:40:42 +01004484 }
4485 }
William Lallemand222baf22016-11-19 02:00:33 +01004486 else if (strcmp(args[3], "check-port") == 0) {
4487 int i = 0;
4488 if (strl2irc(args[4], strlen(args[4]), &i) != 0) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004489 cli_err(appctx, "'set server <srv> check-port' expects an integer as argument.\n");
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004490 goto out_unlock;
William Lallemand222baf22016-11-19 02:00:33 +01004491 }
4492 if ((i < 0) || (i > 65535)) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004493 cli_err(appctx, "provided port is not valid.\n");
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004494 goto out_unlock;
William Lallemand222baf22016-11-19 02:00:33 +01004495 }
4496 /* prevent the update of port to 0 if MAPPORTS are in use */
4497 if ((sv->flags & SRV_F_MAPPORTS) && (i == 0)) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004498 cli_err(appctx, "can't unset 'port' since MAPPORTS is in use.\n");
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004499 goto out_unlock;
William Lallemand222baf22016-11-19 02:00:33 +01004500 }
4501 sv->check.port = i;
Willy Tarreau9d008692019-08-09 11:21:01 +02004502 cli_msg(appctx, LOG_NOTICE, "health check port updated.\n");
William Lallemand222baf22016-11-19 02:00:33 +01004503 }
4504 else if (strcmp(args[3], "addr") == 0) {
4505 char *addr = NULL;
4506 char *port = NULL;
4507 if (strlen(args[4]) == 0) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004508 cli_err(appctx, "set server <b>/<s> addr requires an address and optionally a port.\n");
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004509 goto out_unlock;
William Lallemand222baf22016-11-19 02:00:33 +01004510 }
4511 else {
4512 addr = args[4];
4513 }
4514 if (strcmp(args[5], "port") == 0) {
4515 port = args[6];
4516 }
4517 warning = update_server_addr_port(sv, addr, port, "stats socket command");
Willy Tarreau9d008692019-08-09 11:21:01 +02004518 if (warning)
4519 cli_msg(appctx, LOG_WARNING, warning);
William Lallemand222baf22016-11-19 02:00:33 +01004520 srv_clr_admin_flag(sv, SRV_ADMF_RMAINT);
4521 }
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004522 else if (strcmp(args[3], "fqdn") == 0) {
4523 if (!*args[4]) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004524 cli_err(appctx, "set server <b>/<s> fqdn requires a FQDN.\n");
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004525 goto out_unlock;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004526 }
Baptiste Assmann13a92322019-06-07 09:40:55 +02004527 /* ensure runtime resolver will process this new fqdn */
4528 if (sv->flags & SRV_F_NO_RESOLUTION) {
4529 sv->flags &= ~SRV_F_NO_RESOLUTION;
4530 }
Olivier Houchardd16bfe62017-10-31 15:21:19 +01004531 warning = update_server_fqdn(sv, args[4], "stats socket command", 0);
Willy Tarreau9d008692019-08-09 11:21:01 +02004532 if (warning)
4533 cli_msg(appctx, LOG_WARNING, warning);
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004534 }
William Lallemand222baf22016-11-19 02:00:33 +01004535 else {
Willy Tarreau9d008692019-08-09 11:21:01 +02004536 cli_err(appctx,
4537 "'set server <srv>' only supports 'agent', 'health', 'state',"
4538 " 'weight', 'addr', 'fqdn' and 'check-port'.\n");
William Lallemand222baf22016-11-19 02:00:33 +01004539 }
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004540 out_unlock:
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004541 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
William Lallemand222baf22016-11-19 02:00:33 +01004542 return 1;
4543}
4544
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004545static int cli_parse_get_weight(char **args, char *payload, struct appctx *appctx, void *private)
William Lallemand6b160942016-11-22 12:34:35 +01004546{
4547 struct stream_interface *si = appctx->owner;
4548 struct proxy *px;
4549 struct server *sv;
4550 char *line;
4551
4552
4553 /* split "backend/server" and make <line> point to server */
4554 for (line = args[2]; *line; line++)
4555 if (*line == '/') {
4556 *line++ = '\0';
4557 break;
4558 }
4559
Willy Tarreau9d008692019-08-09 11:21:01 +02004560 if (!*line)
4561 return cli_err(appctx, "Require 'backend/server'.\n");
William Lallemand6b160942016-11-22 12:34:35 +01004562
Willy Tarreau9d008692019-08-09 11:21:01 +02004563 if (!get_backend_server(args[2], line, &px, &sv))
4564 return cli_err(appctx, px ? "No such server.\n" : "No such backend.\n");
William Lallemand6b160942016-11-22 12:34:35 +01004565
4566 /* return server's effective weight at the moment */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004567 snprintf(trash.area, trash.size, "%d (initial %d)\n", sv->uweight,
4568 sv->iweight);
4569 if (ci_putstr(si_ic(si), trash.area) == -1) {
Willy Tarreaudb398432018-11-15 11:08:52 +01004570 si_rx_room_blk(si);
Christopher Faulet90b5abe2016-12-05 14:25:08 +01004571 return 0;
4572 }
William Lallemand6b160942016-11-22 12:34:35 +01004573 return 1;
4574}
4575
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004576/* Parse a "set weight" command.
4577 *
4578 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004579 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004580static int cli_parse_set_weight(char **args, char *payload, struct appctx *appctx, void *private)
William Lallemand6b160942016-11-22 12:34:35 +01004581{
4582 struct server *sv;
4583 const char *warning;
4584
4585 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4586 return 1;
4587
4588 sv = cli_find_server(appctx, args[2]);
4589 if (!sv)
4590 return 1;
4591
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004592 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
4593
William Lallemand6b160942016-11-22 12:34:35 +01004594 warning = server_parse_weight_change_request(sv, args[3]);
Willy Tarreau9d008692019-08-09 11:21:01 +02004595 if (warning)
4596 cli_err(appctx, warning);
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004597
4598 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
4599
William Lallemand6b160942016-11-22 12:34:35 +01004600 return 1;
4601}
4602
Willy Tarreau46b7f532018-08-21 11:54:26 +02004603/* parse a "set maxconn server" command. It always returns 1.
4604 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004605 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004606 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004607static int cli_parse_set_maxconn_server(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreaub8026272016-11-23 11:26:56 +01004608{
4609 struct server *sv;
4610 const char *warning;
4611
4612 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4613 return 1;
4614
4615 sv = cli_find_server(appctx, args[3]);
4616 if (!sv)
4617 return 1;
4618
4619 warning = server_parse_maxconn_change_request(sv, args[4]);
Willy Tarreau9d008692019-08-09 11:21:01 +02004620 if (warning)
4621 cli_err(appctx, warning);
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004622
Willy Tarreaub8026272016-11-23 11:26:56 +01004623 return 1;
4624}
William Lallemand6b160942016-11-22 12:34:35 +01004625
Willy Tarreau46b7f532018-08-21 11:54:26 +02004626/* parse a "disable agent" command. It always returns 1.
4627 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004628 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004629 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004630static int cli_parse_disable_agent(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004631{
4632 struct server *sv;
4633
4634 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4635 return 1;
4636
4637 sv = cli_find_server(appctx, args[2]);
4638 if (!sv)
4639 return 1;
4640
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004641 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004642 sv->agent.state &= ~CHK_ST_ENABLED;
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004643 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004644 return 1;
4645}
4646
Willy Tarreau46b7f532018-08-21 11:54:26 +02004647/* parse a "disable health" command. It always returns 1.
4648 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004649 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004650 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004651static int cli_parse_disable_health(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004652{
4653 struct server *sv;
4654
4655 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4656 return 1;
4657
4658 sv = cli_find_server(appctx, args[2]);
4659 if (!sv)
4660 return 1;
4661
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004662 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004663 sv->check.state &= ~CHK_ST_ENABLED;
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004664 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004665 return 1;
4666}
4667
Willy Tarreau46b7f532018-08-21 11:54:26 +02004668/* parse a "disable server" command. It always returns 1.
4669 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004670 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004671 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004672static int cli_parse_disable_server(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreauffb4d582016-11-24 12:47:00 +01004673{
4674 struct server *sv;
4675
4676 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4677 return 1;
4678
4679 sv = cli_find_server(appctx, args[2]);
4680 if (!sv)
4681 return 1;
4682
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004683 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreauffb4d582016-11-24 12:47:00 +01004684 srv_adm_set_maint(sv);
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004685 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreauffb4d582016-11-24 12:47:00 +01004686 return 1;
4687}
4688
Willy Tarreau46b7f532018-08-21 11:54:26 +02004689/* parse a "enable agent" command. It always returns 1.
4690 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004691 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004692 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004693static int cli_parse_enable_agent(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004694{
4695 struct server *sv;
4696
4697 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4698 return 1;
4699
4700 sv = cli_find_server(appctx, args[2]);
4701 if (!sv)
4702 return 1;
4703
Willy Tarreau9d008692019-08-09 11:21:01 +02004704 if (!(sv->agent.state & CHK_ST_CONFIGURED))
4705 return cli_err(appctx, "Agent was not configured on this server, cannot enable.\n");
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004706
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004707 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004708 sv->agent.state |= CHK_ST_ENABLED;
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004709 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004710 return 1;
4711}
4712
Willy Tarreau46b7f532018-08-21 11:54:26 +02004713/* parse a "enable health" command. It always returns 1.
4714 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004715 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004716 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004717static int cli_parse_enable_health(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004718{
4719 struct server *sv;
4720
4721 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4722 return 1;
4723
4724 sv = cli_find_server(appctx, args[2]);
4725 if (!sv)
4726 return 1;
4727
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004728 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004729 sv->check.state |= CHK_ST_ENABLED;
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004730 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004731 return 1;
4732}
4733
Willy Tarreau46b7f532018-08-21 11:54:26 +02004734/* parse a "enable server" command. It always returns 1.
4735 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004736 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004737 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004738static int cli_parse_enable_server(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreauffb4d582016-11-24 12:47:00 +01004739{
4740 struct server *sv;
4741
4742 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4743 return 1;
4744
4745 sv = cli_find_server(appctx, args[2]);
4746 if (!sv)
4747 return 1;
4748
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004749 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreauffb4d582016-11-24 12:47:00 +01004750 srv_adm_set_ready(sv);
Olivier Houcharde9bad0a2018-01-17 17:39:34 +01004751 if (!(sv->flags & SRV_F_COOKIESET)
4752 && (sv->proxy->ck_opts & PR_CK_DYNAMIC) &&
4753 sv->cookie)
4754 srv_check_for_dup_dyncookie(sv);
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004755 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreauffb4d582016-11-24 12:47:00 +01004756 return 1;
4757}
4758
William Lallemand222baf22016-11-19 02:00:33 +01004759/* register cli keywords */
4760static struct cli_kw_list cli_kws = {{ },{
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004761 { { "disable", "agent", NULL }, "disable agent : disable agent checks (use 'set server' instead)", cli_parse_disable_agent, NULL },
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004762 { { "disable", "health", NULL }, "disable health : disable health checks (use 'set server' instead)", cli_parse_disable_health, NULL },
Willy Tarreauffb4d582016-11-24 12:47:00 +01004763 { { "disable", "server", NULL }, "disable server : disable a server for maintenance (use 'set server' instead)", cli_parse_disable_server, NULL },
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004764 { { "enable", "agent", NULL }, "enable agent : enable agent checks (use 'set server' instead)", cli_parse_enable_agent, NULL },
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004765 { { "enable", "health", NULL }, "enable health : enable health checks (use 'set server' instead)", cli_parse_enable_health, NULL },
Willy Tarreauffb4d582016-11-24 12:47:00 +01004766 { { "enable", "server", NULL }, "enable server : enable a disabled server (use 'set server' instead)", cli_parse_enable_server, NULL },
Willy Tarreaub8026272016-11-23 11:26:56 +01004767 { { "set", "maxconn", "server", NULL }, "set maxconn server : change a server's maxconn setting", cli_parse_set_maxconn_server, NULL },
William Lallemand222baf22016-11-19 02:00:33 +01004768 { { "set", "server", NULL }, "set server : change a server's state, weight or address", cli_parse_set_server },
William Lallemand6b160942016-11-22 12:34:35 +01004769 { { "get", "weight", NULL }, "get weight : report a server's current weight", cli_parse_get_weight },
4770 { { "set", "weight", NULL }, "set weight : change a server's weight (deprecated)", cli_parse_set_weight },
4771
William Lallemand222baf22016-11-19 02:00:33 +01004772 {{},}
4773}};
4774
Willy Tarreau0108d902018-11-25 19:14:37 +01004775INITCALL1(STG_REGISTER, cli_register_kw, &cli_kws);
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004776
Emeric Brun64cc49c2017-10-03 14:46:45 +02004777/*
4778 * This function applies server's status changes, it is
4779 * is designed to be called asynchronously.
4780 *
Willy Tarreau1e690bb2020-10-22 11:30:59 +02004781 * Must be called with the server lock held. This may also be called at init
4782 * time as the result of parsing the state file, in which case no lock will be
4783 * held, and the server's warmup task can be null.
Emeric Brun64cc49c2017-10-03 14:46:45 +02004784 */
Willy Tarreau3ff577e2018-08-02 11:48:52 +02004785static void srv_update_status(struct server *s)
Emeric Brun64cc49c2017-10-03 14:46:45 +02004786{
4787 struct check *check = &s->check;
4788 int xferred;
4789 struct proxy *px = s->proxy;
4790 int prev_srv_count = s->proxy->srv_bck + s->proxy->srv_act;
4791 int srv_was_stopping = (s->cur_state == SRV_ST_STOPPING) || (s->cur_admin & SRV_ADMF_DRAIN);
4792 int log_level;
Willy Tarreau83061a82018-07-13 11:56:34 +02004793 struct buffer *tmptrash = NULL;
Emeric Brun64cc49c2017-10-03 14:46:45 +02004794
Emeric Brun64cc49c2017-10-03 14:46:45 +02004795 /* If currently main is not set we try to apply pending state changes */
4796 if (!(s->cur_admin & SRV_ADMF_MAINT)) {
4797 int next_admin;
4798
4799 /* Backup next admin */
4800 next_admin = s->next_admin;
4801
4802 /* restore current admin state */
4803 s->next_admin = s->cur_admin;
4804
4805 if ((s->cur_state != SRV_ST_STOPPED) && (s->next_state == SRV_ST_STOPPED)) {
4806 s->last_change = now.tv_sec;
4807 if (s->proxy->lbprm.set_server_status_down)
4808 s->proxy->lbprm.set_server_status_down(s);
4809
4810 if (s->onmarkeddown & HANA_ONMARKEDDOWN_SHUTDOWNSESSIONS)
4811 srv_shutdown_streams(s, SF_ERR_DOWN);
4812
4813 /* we might have streams queued on this server and waiting for
4814 * a connection. Those which are redispatchable will be queued
4815 * to another server or to the proxy itself.
4816 */
4817 xferred = pendconn_redistribute(s);
4818
4819 tmptrash = alloc_trash_chunk();
4820 if (tmptrash) {
4821 chunk_printf(tmptrash,
4822 "%sServer %s/%s is DOWN", s->flags & SRV_F_BACKUP ? "Backup " : "",
4823 s->proxy->id, s->id);
4824
Emeric Brun5a133512017-10-19 14:42:30 +02004825 srv_append_status(tmptrash, s, NULL, xferred, 0);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004826 ha_warning("%s.\n", tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004827
4828 /* we don't send an alert if the server was previously paused */
4829 log_level = srv_was_stopping ? LOG_NOTICE : LOG_ALERT;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004830 send_log(s->proxy, log_level, "%s.\n",
4831 tmptrash->area);
4832 send_email_alert(s, log_level, "%s",
4833 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004834 free_trash_chunk(tmptrash);
4835 tmptrash = NULL;
4836 }
4837 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
4838 set_backend_down(s->proxy);
4839
4840 s->counters.down_trans++;
4841 }
4842 else if ((s->cur_state != SRV_ST_STOPPING) && (s->next_state == SRV_ST_STOPPING)) {
4843 s->last_change = now.tv_sec;
4844 if (s->proxy->lbprm.set_server_status_down)
4845 s->proxy->lbprm.set_server_status_down(s);
4846
4847 /* we might have streams queued on this server and waiting for
4848 * a connection. Those which are redispatchable will be queued
4849 * to another server or to the proxy itself.
4850 */
4851 xferred = pendconn_redistribute(s);
4852
4853 tmptrash = alloc_trash_chunk();
4854 if (tmptrash) {
4855 chunk_printf(tmptrash,
4856 "%sServer %s/%s is stopping", s->flags & SRV_F_BACKUP ? "Backup " : "",
4857 s->proxy->id, s->id);
4858
Emeric Brun5a133512017-10-19 14:42:30 +02004859 srv_append_status(tmptrash, s, NULL, xferred, 0);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004860
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004861 ha_warning("%s.\n", tmptrash->area);
4862 send_log(s->proxy, LOG_NOTICE, "%s.\n",
4863 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004864 free_trash_chunk(tmptrash);
4865 tmptrash = NULL;
4866 }
4867
4868 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
4869 set_backend_down(s->proxy);
4870 }
4871 else if (((s->cur_state != SRV_ST_RUNNING) && (s->next_state == SRV_ST_RUNNING))
4872 || ((s->cur_state != SRV_ST_STARTING) && (s->next_state == SRV_ST_STARTING))) {
4873 if (s->proxy->srv_bck == 0 && s->proxy->srv_act == 0) {
4874 if (s->proxy->last_change < now.tv_sec) // ignore negative times
4875 s->proxy->down_time += now.tv_sec - s->proxy->last_change;
4876 s->proxy->last_change = now.tv_sec;
4877 }
4878
Amaury Denoyellefe2bf092020-10-29 15:59:04 +01004879 if (s->cur_state == SRV_ST_STOPPED && s->last_change < now.tv_sec) // ignore negative times
Emeric Brun64cc49c2017-10-03 14:46:45 +02004880 s->down_time += now.tv_sec - s->last_change;
4881
4882 s->last_change = now.tv_sec;
Willy Tarreau1e690bb2020-10-22 11:30:59 +02004883 if (s->next_state == SRV_ST_STARTING && s->warmup)
Emeric Brun64cc49c2017-10-03 14:46:45 +02004884 task_schedule(s->warmup, tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20))));
4885
Willy Tarreau3ff577e2018-08-02 11:48:52 +02004886 server_recalc_eweight(s, 0);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004887 /* now propagate the status change to any LB algorithms */
4888 if (px->lbprm.update_server_eweight)
4889 px->lbprm.update_server_eweight(s);
4890 else if (srv_willbe_usable(s)) {
4891 if (px->lbprm.set_server_status_up)
4892 px->lbprm.set_server_status_up(s);
4893 }
4894 else {
4895 if (px->lbprm.set_server_status_down)
4896 px->lbprm.set_server_status_down(s);
4897 }
4898
4899 /* If the server is set with "on-marked-up shutdown-backup-sessions",
4900 * and it's not a backup server and its effective weight is > 0,
4901 * then it can accept new connections, so we shut down all streams
4902 * on all backup servers.
4903 */
4904 if ((s->onmarkedup & HANA_ONMARKEDUP_SHUTDOWNBACKUPSESSIONS) &&
4905 !(s->flags & SRV_F_BACKUP) && s->next_eweight)
4906 srv_shutdown_backup_streams(s->proxy, SF_ERR_UP);
4907
4908 /* check if we can handle some connections queued at the proxy. We
4909 * will take as many as we can handle.
4910 */
4911 xferred = pendconn_grab_from_px(s);
4912
4913 tmptrash = alloc_trash_chunk();
4914 if (tmptrash) {
4915 chunk_printf(tmptrash,
4916 "%sServer %s/%s is UP", s->flags & SRV_F_BACKUP ? "Backup " : "",
4917 s->proxy->id, s->id);
4918
Emeric Brun5a133512017-10-19 14:42:30 +02004919 srv_append_status(tmptrash, s, NULL, xferred, 0);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004920 ha_warning("%s.\n", tmptrash->area);
4921 send_log(s->proxy, LOG_NOTICE, "%s.\n",
4922 tmptrash->area);
4923 send_email_alert(s, LOG_NOTICE, "%s",
4924 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004925 free_trash_chunk(tmptrash);
4926 tmptrash = NULL;
4927 }
4928
4929 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
4930 set_backend_down(s->proxy);
4931 }
4932 else if (s->cur_eweight != s->next_eweight) {
4933 /* now propagate the status change to any LB algorithms */
4934 if (px->lbprm.update_server_eweight)
4935 px->lbprm.update_server_eweight(s);
4936 else if (srv_willbe_usable(s)) {
4937 if (px->lbprm.set_server_status_up)
4938 px->lbprm.set_server_status_up(s);
4939 }
4940 else {
4941 if (px->lbprm.set_server_status_down)
4942 px->lbprm.set_server_status_down(s);
4943 }
4944
4945 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
4946 set_backend_down(s->proxy);
4947 }
4948
4949 s->next_admin = next_admin;
4950 }
4951
Emeric Brun5a133512017-10-19 14:42:30 +02004952 /* reset operational state change */
4953 *s->op_st_chg.reason = 0;
4954 s->op_st_chg.status = s->op_st_chg.code = -1;
4955 s->op_st_chg.duration = 0;
Emeric Brun64cc49c2017-10-03 14:46:45 +02004956
4957 /* Now we try to apply pending admin changes */
4958
4959 /* Maintenance must also disable health checks */
4960 if (!(s->cur_admin & SRV_ADMF_MAINT) && (s->next_admin & SRV_ADMF_MAINT)) {
4961 if (s->check.state & CHK_ST_ENABLED) {
4962 s->check.state |= CHK_ST_PAUSED;
4963 check->health = 0;
4964 }
4965
4966 if (s->cur_state == SRV_ST_STOPPED) { /* server was already down */
Olivier Houchard796a2b32017-10-24 17:42:47 +02004967 tmptrash = alloc_trash_chunk();
4968 if (tmptrash) {
4969 chunk_printf(tmptrash,
4970 "%sServer %s/%s was DOWN and now enters maintenance%s%s%s",
4971 s->flags & SRV_F_BACKUP ? "Backup " : "", s->proxy->id, s->id,
4972 *(s->adm_st_chg_cause) ? " (" : "", s->adm_st_chg_cause, *(s->adm_st_chg_cause) ? ")" : "");
Emeric Brun64cc49c2017-10-03 14:46:45 +02004973
Olivier Houchard796a2b32017-10-24 17:42:47 +02004974 srv_append_status(tmptrash, s, NULL, -1, (s->next_admin & SRV_ADMF_FMAINT));
Emeric Brun64cc49c2017-10-03 14:46:45 +02004975
Olivier Houchard796a2b32017-10-24 17:42:47 +02004976 if (!(global.mode & MODE_STARTING)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004977 ha_warning("%s.\n", tmptrash->area);
4978 send_log(s->proxy, LOG_NOTICE, "%s.\n",
4979 tmptrash->area);
Olivier Houchard796a2b32017-10-24 17:42:47 +02004980 }
4981 free_trash_chunk(tmptrash);
4982 tmptrash = NULL;
Emeric Brun64cc49c2017-10-03 14:46:45 +02004983 }
Emeric Brun8f298292017-12-06 16:47:17 +01004984 /* commit new admin status */
4985
4986 s->cur_admin = s->next_admin;
Emeric Brun64cc49c2017-10-03 14:46:45 +02004987 }
4988 else { /* server was still running */
4989 check->health = 0; /* failure */
4990 s->last_change = now.tv_sec;
Emeric Brune3114802017-12-21 14:42:26 +01004991
4992 s->next_state = SRV_ST_STOPPED;
Emeric Brun64cc49c2017-10-03 14:46:45 +02004993 if (s->proxy->lbprm.set_server_status_down)
4994 s->proxy->lbprm.set_server_status_down(s);
4995
Emeric Brun64cc49c2017-10-03 14:46:45 +02004996 if (s->onmarkeddown & HANA_ONMARKEDDOWN_SHUTDOWNSESSIONS)
4997 srv_shutdown_streams(s, SF_ERR_DOWN);
4998
William Dauchy6318d332020-05-02 21:52:36 +02004999 /* force connection cleanup on the given server */
5000 srv_cleanup_connections(s);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005001 /* we might have streams queued on this server and waiting for
5002 * a connection. Those which are redispatchable will be queued
5003 * to another server or to the proxy itself.
5004 */
5005 xferred = pendconn_redistribute(s);
5006
5007 tmptrash = alloc_trash_chunk();
5008 if (tmptrash) {
5009 chunk_printf(tmptrash,
5010 "%sServer %s/%s is going DOWN for maintenance%s%s%s",
5011 s->flags & SRV_F_BACKUP ? "Backup " : "",
5012 s->proxy->id, s->id,
5013 *(s->adm_st_chg_cause) ? " (" : "", s->adm_st_chg_cause, *(s->adm_st_chg_cause) ? ")" : "");
5014
5015 srv_append_status(tmptrash, s, NULL, xferred, (s->next_admin & SRV_ADMF_FMAINT));
5016
5017 if (!(global.mode & MODE_STARTING)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005018 ha_warning("%s.\n", tmptrash->area);
5019 send_log(s->proxy, srv_was_stopping ? LOG_NOTICE : LOG_ALERT, "%s.\n",
5020 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005021 }
5022 free_trash_chunk(tmptrash);
5023 tmptrash = NULL;
5024 }
5025 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
5026 set_backend_down(s->proxy);
5027
5028 s->counters.down_trans++;
5029 }
5030 }
5031 else if ((s->cur_admin & SRV_ADMF_MAINT) && !(s->next_admin & SRV_ADMF_MAINT)) {
5032 /* OK here we're leaving maintenance, we have many things to check,
5033 * because the server might possibly be coming back up depending on
5034 * its state. In practice, leaving maintenance means that we should
5035 * immediately turn to UP (more or less the slowstart) under the
5036 * following conditions :
5037 * - server is neither checked nor tracked
5038 * - server tracks another server which is not checked
5039 * - server tracks another server which is already up
5040 * Which sums up as something simpler :
5041 * "either the tracking server is up or the server's checks are disabled
5042 * or up". Otherwise we only re-enable health checks. There's a special
5043 * case associated to the stopping state which can be inherited. Note
5044 * that the server might still be in drain mode, which is naturally dealt
5045 * with by the lower level functions.
5046 */
5047
5048 if (s->check.state & CHK_ST_ENABLED) {
5049 s->check.state &= ~CHK_ST_PAUSED;
5050 check->health = check->rise; /* start OK but check immediately */
5051 }
5052
5053 if ((!s->track || s->track->next_state != SRV_ST_STOPPED) &&
5054 (!(s->agent.state & CHK_ST_ENABLED) || (s->agent.health >= s->agent.rise)) &&
5055 (!(s->check.state & CHK_ST_ENABLED) || (s->check.health >= s->check.rise))) {
5056 if (s->track && s->track->next_state == SRV_ST_STOPPING) {
5057 s->next_state = SRV_ST_STOPPING;
5058 }
5059 else {
5060 s->next_state = SRV_ST_STARTING;
Willy Tarreau1e690bb2020-10-22 11:30:59 +02005061 if (s->slowstart > 0) {
5062 if (s->warmup)
5063 task_schedule(s->warmup, tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20))));
5064 }
Emeric Brun64cc49c2017-10-03 14:46:45 +02005065 else
5066 s->next_state = SRV_ST_RUNNING;
5067 }
5068
5069 }
5070
5071 tmptrash = alloc_trash_chunk();
5072 if (tmptrash) {
5073 if (!(s->next_admin & SRV_ADMF_FMAINT) && (s->cur_admin & SRV_ADMF_FMAINT)) {
5074 chunk_printf(tmptrash,
5075 "%sServer %s/%s is %s/%s (leaving forced maintenance)",
5076 s->flags & SRV_F_BACKUP ? "Backup " : "",
5077 s->proxy->id, s->id,
5078 (s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP",
5079 (s->next_admin & SRV_ADMF_DRAIN) ? "DRAIN" : "READY");
5080 }
5081 if (!(s->next_admin & SRV_ADMF_RMAINT) && (s->cur_admin & SRV_ADMF_RMAINT)) {
5082 chunk_printf(tmptrash,
5083 "%sServer %s/%s ('%s') is %s/%s (resolves again)",
5084 s->flags & SRV_F_BACKUP ? "Backup " : "",
5085 s->proxy->id, s->id, s->hostname,
5086 (s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP",
5087 (s->next_admin & SRV_ADMF_DRAIN) ? "DRAIN" : "READY");
5088 }
5089 if (!(s->next_admin & SRV_ADMF_IMAINT) && (s->cur_admin & SRV_ADMF_IMAINT)) {
5090 chunk_printf(tmptrash,
5091 "%sServer %s/%s is %s/%s (leaving maintenance)",
5092 s->flags & SRV_F_BACKUP ? "Backup " : "",
5093 s->proxy->id, s->id,
5094 (s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP",
5095 (s->next_admin & SRV_ADMF_DRAIN) ? "DRAIN" : "READY");
5096 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005097 ha_warning("%s.\n", tmptrash->area);
5098 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5099 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005100 free_trash_chunk(tmptrash);
5101 tmptrash = NULL;
5102 }
5103
Willy Tarreau3ff577e2018-08-02 11:48:52 +02005104 server_recalc_eweight(s, 0);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005105 /* now propagate the status change to any LB algorithms */
5106 if (px->lbprm.update_server_eweight)
5107 px->lbprm.update_server_eweight(s);
5108 else if (srv_willbe_usable(s)) {
5109 if (px->lbprm.set_server_status_up)
5110 px->lbprm.set_server_status_up(s);
5111 }
5112 else {
5113 if (px->lbprm.set_server_status_down)
5114 px->lbprm.set_server_status_down(s);
5115 }
5116
5117 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
5118 set_backend_down(s->proxy);
5119
Willy Tarreau6a78e612018-08-07 10:14:53 +02005120 /* If the server is set with "on-marked-up shutdown-backup-sessions",
5121 * and it's not a backup server and its effective weight is > 0,
5122 * then it can accept new connections, so we shut down all streams
5123 * on all backup servers.
5124 */
5125 if ((s->onmarkedup & HANA_ONMARKEDUP_SHUTDOWNBACKUPSESSIONS) &&
5126 !(s->flags & SRV_F_BACKUP) && s->next_eweight)
5127 srv_shutdown_backup_streams(s->proxy, SF_ERR_UP);
5128
5129 /* check if we can handle some connections queued at the proxy. We
5130 * will take as many as we can handle.
5131 */
5132 xferred = pendconn_grab_from_px(s);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005133 }
5134 else if (s->next_admin & SRV_ADMF_MAINT) {
5135 /* remaining in maintenance mode, let's inform precisely about the
5136 * situation.
5137 */
5138 if (!(s->next_admin & SRV_ADMF_FMAINT) && (s->cur_admin & SRV_ADMF_FMAINT)) {
5139 tmptrash = alloc_trash_chunk();
5140 if (tmptrash) {
5141 chunk_printf(tmptrash,
5142 "%sServer %s/%s is leaving forced maintenance but remains in maintenance",
5143 s->flags & SRV_F_BACKUP ? "Backup " : "",
5144 s->proxy->id, s->id);
5145
5146 if (s->track) /* normally it's mandatory here */
5147 chunk_appendf(tmptrash, " via %s/%s",
5148 s->track->proxy->id, s->track->id);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005149 ha_warning("%s.\n", tmptrash->area);
5150 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5151 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005152 free_trash_chunk(tmptrash);
5153 tmptrash = NULL;
5154 }
5155 }
5156 if (!(s->next_admin & SRV_ADMF_RMAINT) && (s->cur_admin & SRV_ADMF_RMAINT)) {
5157 tmptrash = alloc_trash_chunk();
5158 if (tmptrash) {
5159 chunk_printf(tmptrash,
5160 "%sServer %s/%s ('%s') resolves again but remains in maintenance",
5161 s->flags & SRV_F_BACKUP ? "Backup " : "",
5162 s->proxy->id, s->id, s->hostname);
5163
5164 if (s->track) /* normally it's mandatory here */
5165 chunk_appendf(tmptrash, " via %s/%s",
5166 s->track->proxy->id, s->track->id);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005167 ha_warning("%s.\n", tmptrash->area);
5168 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5169 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005170 free_trash_chunk(tmptrash);
5171 tmptrash = NULL;
5172 }
5173 }
5174 else if (!(s->next_admin & SRV_ADMF_IMAINT) && (s->cur_admin & SRV_ADMF_IMAINT)) {
5175 tmptrash = alloc_trash_chunk();
5176 if (tmptrash) {
5177 chunk_printf(tmptrash,
5178 "%sServer %s/%s remains in forced maintenance",
5179 s->flags & SRV_F_BACKUP ? "Backup " : "",
5180 s->proxy->id, s->id);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005181 ha_warning("%s.\n", tmptrash->area);
5182 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5183 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005184 free_trash_chunk(tmptrash);
5185 tmptrash = NULL;
5186 }
5187 }
5188 /* don't report anything when leaving drain mode and remaining in maintenance */
5189
5190 s->cur_admin = s->next_admin;
5191 }
5192
5193 if (!(s->next_admin & SRV_ADMF_MAINT)) {
5194 if (!(s->cur_admin & SRV_ADMF_DRAIN) && (s->next_admin & SRV_ADMF_DRAIN)) {
5195 /* drain state is applied only if not yet in maint */
5196
5197 s->last_change = now.tv_sec;
5198 if (px->lbprm.set_server_status_down)
5199 px->lbprm.set_server_status_down(s);
5200
5201 /* we might have streams queued on this server and waiting for
5202 * a connection. Those which are redispatchable will be queued
5203 * to another server or to the proxy itself.
5204 */
5205 xferred = pendconn_redistribute(s);
5206
5207 tmptrash = alloc_trash_chunk();
5208 if (tmptrash) {
5209 chunk_printf(tmptrash, "%sServer %s/%s enters drain state%s%s%s",
5210 s->flags & SRV_F_BACKUP ? "Backup " : "", s->proxy->id, s->id,
5211 *(s->adm_st_chg_cause) ? " (" : "", s->adm_st_chg_cause, *(s->adm_st_chg_cause) ? ")" : "");
5212
5213 srv_append_status(tmptrash, s, NULL, xferred, (s->next_admin & SRV_ADMF_FDRAIN));
5214
5215 if (!(global.mode & MODE_STARTING)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005216 ha_warning("%s.\n", tmptrash->area);
5217 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5218 tmptrash->area);
5219 send_email_alert(s, LOG_NOTICE, "%s",
5220 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005221 }
5222 free_trash_chunk(tmptrash);
5223 tmptrash = NULL;
5224 }
5225
5226 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
5227 set_backend_down(s->proxy);
5228 }
5229 else if ((s->cur_admin & SRV_ADMF_DRAIN) && !(s->next_admin & SRV_ADMF_DRAIN)) {
5230 /* OK completely leaving drain mode */
5231 if (s->proxy->srv_bck == 0 && s->proxy->srv_act == 0) {
5232 if (s->proxy->last_change < now.tv_sec) // ignore negative times
5233 s->proxy->down_time += now.tv_sec - s->proxy->last_change;
5234 s->proxy->last_change = now.tv_sec;
5235 }
5236
5237 if (s->last_change < now.tv_sec) // ignore negative times
5238 s->down_time += now.tv_sec - s->last_change;
5239 s->last_change = now.tv_sec;
Willy Tarreau3ff577e2018-08-02 11:48:52 +02005240 server_recalc_eweight(s, 0);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005241
5242 tmptrash = alloc_trash_chunk();
5243 if (tmptrash) {
5244 if (!(s->next_admin & SRV_ADMF_FDRAIN)) {
5245 chunk_printf(tmptrash,
5246 "%sServer %s/%s is %s (leaving forced drain)",
5247 s->flags & SRV_F_BACKUP ? "Backup " : "",
5248 s->proxy->id, s->id,
5249 (s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP");
5250 }
5251 else {
5252 chunk_printf(tmptrash,
5253 "%sServer %s/%s is %s (leaving drain)",
5254 s->flags & SRV_F_BACKUP ? "Backup " : "",
5255 s->proxy->id, s->id,
5256 (s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP");
5257 if (s->track) /* normally it's mandatory here */
5258 chunk_appendf(tmptrash, " via %s/%s",
5259 s->track->proxy->id, s->track->id);
5260 }
5261
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005262 ha_warning("%s.\n", tmptrash->area);
5263 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5264 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005265 free_trash_chunk(tmptrash);
5266 tmptrash = NULL;
5267 }
5268
5269 /* now propagate the status change to any LB algorithms */
5270 if (px->lbprm.update_server_eweight)
5271 px->lbprm.update_server_eweight(s);
5272 else if (srv_willbe_usable(s)) {
5273 if (px->lbprm.set_server_status_up)
5274 px->lbprm.set_server_status_up(s);
5275 }
5276 else {
5277 if (px->lbprm.set_server_status_down)
5278 px->lbprm.set_server_status_down(s);
5279 }
5280 }
5281 else if ((s->next_admin & SRV_ADMF_DRAIN)) {
5282 /* remaining in drain mode after removing one of its flags */
5283
5284 tmptrash = alloc_trash_chunk();
5285 if (tmptrash) {
5286 if (!(s->next_admin & SRV_ADMF_FDRAIN)) {
5287 chunk_printf(tmptrash,
5288 "%sServer %s/%s is leaving forced drain but remains in drain mode",
5289 s->flags & SRV_F_BACKUP ? "Backup " : "",
5290 s->proxy->id, s->id);
5291
5292 if (s->track) /* normally it's mandatory here */
5293 chunk_appendf(tmptrash, " via %s/%s",
5294 s->track->proxy->id, s->track->id);
5295 }
5296 else {
5297 chunk_printf(tmptrash,
5298 "%sServer %s/%s remains in forced drain mode",
5299 s->flags & SRV_F_BACKUP ? "Backup " : "",
5300 s->proxy->id, s->id);
5301 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005302 ha_warning("%s.\n", tmptrash->area);
5303 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5304 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005305 free_trash_chunk(tmptrash);
5306 tmptrash = NULL;
5307 }
5308
5309 /* commit new admin status */
5310
5311 s->cur_admin = s->next_admin;
5312 }
5313 }
5314
5315 /* Re-set log strings to empty */
Emeric Brun64cc49c2017-10-03 14:46:45 +02005316 *s->adm_st_chg_cause = 0;
5317}
Emeric Brun64cc49c2017-10-03 14:46:45 +02005318
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005319struct task *srv_cleanup_toremove_connections(struct task *task, void *context, unsigned short state)
5320{
5321 struct connection *conn;
5322
Willy Tarreau4d82bf52020-06-28 00:19:17 +02005323 while ((conn = MT_LIST_POP(&idle_conns[tid].toremove_conns,
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005324 struct connection *, list)) != NULL) {
Christopher Faulet73c12072019-04-08 11:23:22 +02005325 conn->mux->destroy(conn->ctx);
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005326 }
5327
5328 return task;
5329}
5330
Olivier Houchardff1d0922020-06-29 20:15:59 +02005331/* Move toremove_nb connections from idle_list to toremove_list, -1 means
5332 * moving them all.
5333 * Returns the number of connections moved.
5334 */
5335static int srv_migrate_conns_to_remove(struct mt_list *idle_list, struct mt_list *toremove_list, int toremove_nb)
5336{
5337 struct mt_list *elt1, elt2;
5338 struct connection *conn;
5339 int i = 0;
5340
5341 mt_list_for_each_entry_safe(conn, idle_list, list, elt1, elt2) {
5342 if (toremove_nb != -1 && i >= toremove_nb)
5343 break;
5344 MT_LIST_DEL_SAFE_NOINIT(elt1);
Willy Tarreaude4db172020-07-10 08:10:29 +02005345 MT_LIST_ADDQ(toremove_list, &conn->list);
Olivier Houchardff1d0922020-06-29 20:15:59 +02005346 i++;
5347 }
5348 return i;
5349}
William Dauchy6318d332020-05-02 21:52:36 +02005350/* cleanup connections for a given server
5351 * might be useful when going on forced maintenance or live changing ip/port
5352 */
William Dauchy707ad322020-05-04 13:52:40 +02005353static void srv_cleanup_connections(struct server *srv)
William Dauchy6318d332020-05-02 21:52:36 +02005354{
William Dauchy6318d332020-05-02 21:52:36 +02005355 int did_remove;
5356 int i;
William Dauchy6318d332020-05-02 21:52:36 +02005357
Amaury Denoyellec0a2ace2021-01-06 14:28:51 +01005358 /* nothing to do if pool-max-conn is null */
5359 if (!srv->max_idle_conns)
5360 return;
5361
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02005362 /* check all threads starting with ours */
William Dauchy6318d332020-05-02 21:52:36 +02005363 HA_SPIN_LOCK(OTHER_LOCK, &idle_conn_srv_lock);
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02005364 for (i = tid;;) {
William Dauchy6318d332020-05-02 21:52:36 +02005365 did_remove = 0;
Olivier Houchardff1d0922020-06-29 20:15:59 +02005366 if (srv_migrate_conns_to_remove(&srv->idle_conns[i], &idle_conns[i].toremove_conns, -1) > 0)
William Dauchy6318d332020-05-02 21:52:36 +02005367 did_remove = 1;
Olivier Houchardff1d0922020-06-29 20:15:59 +02005368 if (srv_migrate_conns_to_remove(&srv->safe_conns[i], &idle_conns[i].toremove_conns, -1) > 0)
5369 did_remove = 1;
William Dauchy6318d332020-05-02 21:52:36 +02005370 if (did_remove)
Willy Tarreau4d82bf52020-06-28 00:19:17 +02005371 task_wakeup(idle_conns[i].cleanup_task, TASK_WOKEN_OTHER);
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02005372
5373 if ((i = ((i + 1 == global.nbthread) ? 0 : i + 1)) == tid)
5374 break;
William Dauchy6318d332020-05-02 21:52:36 +02005375 }
5376 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conn_srv_lock);
5377}
5378
Willy Tarreau980855b2019-02-07 14:59:29 +01005379struct task *srv_cleanup_idle_connections(struct task *task, void *context, unsigned short state)
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01005380{
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005381 struct server *srv;
5382 struct eb32_node *eb;
5383 int i;
5384 unsigned int next_wakeup;
Olivier Houchardb7b3faa2018-12-14 18:15:36 +01005385
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005386 next_wakeup = TICK_ETERNITY;
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005387 HA_SPIN_LOCK(OTHER_LOCK, &idle_conn_srv_lock);
5388 while (1) {
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005389 int exceed_conns;
5390 int to_kill;
5391 int curr_idle;
Olivier Houchardb7b3faa2018-12-14 18:15:36 +01005392
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005393 eb = eb32_lookup_ge(&idle_conn_srv, now_ms - TIMER_LOOK_BACK);
5394 if (!eb) {
5395 /* we might have reached the end of the tree, typically because
5396 * <now_ms> is in the first half and we're first scanning the last
5397 * half. Let's loop back to the beginning of the tree now.
5398 */
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01005399
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005400 eb = eb32_first(&idle_conn_srv);
5401 if (likely(!eb))
5402 break;
5403 }
5404 if (tick_is_lt(now_ms, eb->key)) {
5405 /* timer not expired yet, revisit it later */
5406 next_wakeup = eb->key;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01005407 break;
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005408 }
5409 srv = eb32_entry(eb, struct server, idle_node);
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005410
5411 /* Calculate how many idle connections we want to kill :
5412 * we want to remove half the difference between the total
5413 * of established connections (used or idle) and the max
5414 * number of used connections.
5415 */
5416 curr_idle = srv->curr_idle_conns;
5417 if (curr_idle == 0)
5418 goto remove;
Willy Tarreaubdb86bd2020-06-29 15:56:35 +02005419 exceed_conns = srv->curr_used_conns + curr_idle - MAX(srv->max_used_conns, srv->est_need_conns);
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005420 exceed_conns = to_kill = exceed_conns / 2 + (exceed_conns & 1);
Willy Tarreaubdb86bd2020-06-29 15:56:35 +02005421
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005422 srv->est_need_conns = (srv->est_need_conns + srv->max_used_conns) / 2;
Willy Tarreaubdb86bd2020-06-29 15:56:35 +02005423 if (srv->est_need_conns < srv->max_used_conns)
5424 srv->est_need_conns = srv->max_used_conns;
5425
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005426 srv->max_used_conns = srv->curr_used_conns;
5427
Willy Tarreau18ed7892020-07-02 19:05:30 +02005428 if (exceed_conns <= 0)
5429 goto remove;
5430
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02005431 /* check all threads starting with ours */
5432 for (i = tid;;) {
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005433 int max_conn;
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005434 int j;
5435 int did_remove = 0;
5436
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005437 max_conn = (exceed_conns * srv->curr_idle_thr[i]) /
5438 curr_idle + 1;
Olivier Houchardff1d0922020-06-29 20:15:59 +02005439
5440 j = srv_migrate_conns_to_remove(&srv->idle_conns[i], &idle_conns[i].toremove_conns, max_conn);
5441 if (j > 0)
5442 did_remove = 1;
5443 if (max_conn - j > 0 &&
5444 srv_migrate_conns_to_remove(&srv->safe_conns[i], &idle_conns[i].toremove_conns, max_conn - j) > 0)
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005445 did_remove = 1;
Olivier Houchardff1d0922020-06-29 20:15:59 +02005446
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005447 if (did_remove)
Willy Tarreau4d82bf52020-06-28 00:19:17 +02005448 task_wakeup(idle_conns[i].cleanup_task, TASK_WOKEN_OTHER);
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02005449
5450 if ((i = ((i + 1 == global.nbthread) ? 0 : i + 1)) == tid)
5451 break;
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005452 }
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005453remove:
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005454 eb32_delete(&srv->idle_node);
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005455
5456 if (srv->curr_idle_conns) {
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005457 /* There are still more idle connections, add the
5458 * server back in the tree.
5459 */
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005460 srv->idle_node.key = tick_add(srv->pool_purge_delay, now_ms);
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005461 eb32_insert(&idle_conn_srv, &srv->idle_node);
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005462 next_wakeup = tick_first(next_wakeup, srv->idle_node.key);
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005463 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01005464 }
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005465 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conn_srv_lock);
5466
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005467 task->expire = next_wakeup;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01005468 return task;
5469}
Olivier Houchard88698d92019-04-16 19:07:22 +02005470
Willy Tarreau76cc6992020-07-01 18:49:24 +02005471/* config parser for global "tune.idle-pool.shared", accepts "on" or "off" */
5472static int cfg_parse_idle_pool_shared(char **args, int section_type, struct proxy *curpx,
5473 struct proxy *defpx, const char *file, int line,
5474 char **err)
5475{
5476 if (too_many_args(1, args, err, NULL))
5477 return -1;
5478
5479 if (strcmp(args[1], "on") == 0)
5480 global.tune.options |= GTUNE_IDLE_POOL_SHARED;
5481 else if (strcmp(args[1], "off") == 0)
5482 global.tune.options &= ~GTUNE_IDLE_POOL_SHARED;
5483 else {
5484 memprintf(err, "'%s' expects either 'on' or 'off' but got '%s'.", args[0], args[1]);
5485 return -1;
5486 }
5487 return 0;
5488}
5489
Olivier Houchard88698d92019-04-16 19:07:22 +02005490/* config parser for global "tune.pool-{low,high}-fd-ratio" */
5491static int cfg_parse_pool_fd_ratio(char **args, int section_type, struct proxy *curpx,
5492 struct proxy *defpx, const char *file, int line,
5493 char **err)
5494{
5495 int arg = -1;
5496
5497 if (too_many_args(1, args, err, NULL))
5498 return -1;
5499
5500 if (*(args[1]) != 0)
5501 arg = atoi(args[1]);
5502
5503 if (arg < 0 || arg > 100) {
5504 memprintf(err, "'%s' expects an integer argument between 0 and 100.", args[0]);
5505 return -1;
5506 }
5507
5508 if (args[0][10] == 'h')
5509 global.tune.pool_high_ratio = arg;
5510 else
5511 global.tune.pool_low_ratio = arg;
5512 return 0;
5513}
5514
5515/* config keyword parsers */
5516static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreau76cc6992020-07-01 18:49:24 +02005517 { CFG_GLOBAL, "tune.idle-pool.shared", cfg_parse_idle_pool_shared },
Olivier Houchard88698d92019-04-16 19:07:22 +02005518 { CFG_GLOBAL, "tune.pool-high-fd-ratio", cfg_parse_pool_fd_ratio },
5519 { CFG_GLOBAL, "tune.pool-low-fd-ratio", cfg_parse_pool_fd_ratio },
5520 { 0, NULL, NULL }
5521}};
5522
5523INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
5524
Baptiste Assmanna68ca962015-04-14 01:15:08 +02005525/*
Willy Tarreaubaaee002006-06-26 02:48:02 +02005526 * Local variables:
5527 * c-indent-level: 8
5528 * c-basic-offset: 8
5529 * End:
5530 */