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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 Tarreau6be78492020-06-05 00:00:29 +020019#include <import/xxhash.h>
20
Willy Tarreaub2551052020-06-09 09:07:15 +020021#include <haproxy/api.h>
Willy Tarreau3f0f82e2020-06-04 19:42:41 +020022#include <haproxy/applet-t.h>
Willy Tarreau49801602020-06-04 22:50:02 +020023#include <haproxy/backend.h>
Willy Tarreau6be78492020-06-05 00:00:29 +020024#include <haproxy/cfgparse.h>
Willy Tarreau4aa573d2020-06-04 18:21:56 +020025#include <haproxy/check.h>
Willy Tarreau83487a82020-06-04 20:19:54 +020026#include <haproxy/cli.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020027#include <haproxy/connection.h>
Willy Tarreau3afc4c42020-06-03 18:23:19 +020028#include <haproxy/dict-t.h>
Willy Tarreau8d366972020-05-27 16:10:29 +020029#include <haproxy/errors.h>
Willy Tarreauf268ee82020-06-04 17:05:57 +020030#include <haproxy/global.h>
Willy Tarreau36979d92020-06-05 17:27:29 +020031#include <haproxy/log.h>
Willy Tarreaucee013e2020-06-05 11:40:38 +020032#include <haproxy/mailers.h>
Willy Tarreau7a00efb2020-06-02 17:02:59 +020033#include <haproxy/namespace.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020034#include <haproxy/port_range.h>
35#include <haproxy/protocol.h>
Willy Tarreaub00a8e32021-05-08 20:18:59 +020036#include <haproxy/proxy.h>
Willy Tarreaua55c4542020-06-04 22:59:39 +020037#include <haproxy/queue.h>
Emeric Brunc9437992021-02-12 19:42:55 +010038#include <haproxy/resolvers.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>
William Dauchyf6370442020-11-14 19:25:33 +010041#include <haproxy/ssl_sock.h>
Amaury Denoyellef99f77a2021-03-08 17:13:32 +010042#include <haproxy/stats.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020043#include <haproxy/stream.h>
Willy Tarreau5e539c92020-06-04 20:45:39 +020044#include <haproxy/stream_interface.h>
Willy Tarreaucea0e1b2020-06-04 17:25:40 +020045#include <haproxy/task.h>
Willy Tarreau51cd5952020-06-05 12:25:38 +020046#include <haproxy/tcpcheck.h>
Willy Tarreau92b4f132020-06-01 11:05:15 +020047#include <haproxy/time.h>
Willy Tarreauba6300e2021-05-08 14:09:40 +020048#include <haproxy/tools.h>
Krzysztof Oledzki85130942007-10-22 16:21:10 +020049
Baptiste Assmannda29fe22019-06-13 13:24:29 +020050
Willy Tarreau3ff577e2018-08-02 11:48:52 +020051static void srv_update_status(struct server *s);
Baptiste Assmann83cbaa52016-11-02 15:34:05 +010052static int srv_apply_lastaddr(struct server *srv, int *err_code);
William Dauchy6318d332020-05-02 21:52:36 +020053static void srv_cleanup_connections(struct server *srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +020054
Amaury Denoyelle587b71e2021-03-10 16:36:02 +010055/* extra keywords used as value for other arguments. They are used as
56 * suggestions for mistyped words.
Willy Tarreau49c2b452021-03-12 09:58:04 +010057 */
Amaury Denoyelle587b71e2021-03-10 16:36:02 +010058static const char *extra_kw_list[] = {
59 "ipv4", "ipv6", "legacy", "octet-count",
Amaury Denoyelle3b89c112021-03-12 16:04:00 +010060 "fail-check", "sudden-death", "mark-down",
Willy Tarreau49c2b452021-03-12 09:58:04 +010061 NULL /* must be last */
62};
63
Willy Tarreau21faa912012-10-10 08:27:36 +020064/* List head of all known server keywords */
65static struct srv_kw_list srv_keywords = {
66 .list = LIST_HEAD_INIT(srv_keywords.list)
67};
Krzysztof Oledzki85130942007-10-22 16:21:10 +020068
Willy Tarreauaf613e82020-06-05 08:40:51 +020069__decl_thread(HA_SPINLOCK_T idle_conn_srv_lock);
Olivier Houchard9ea5d362019-02-14 18:29:09 +010070struct eb_root idle_conn_srv = EB_ROOT;
Willy Tarreau14015b82021-04-10 17:33:15 +020071struct task *idle_conn_task __read_mostly = NULL;
Willy Tarreau198e92a2021-03-05 10:23:32 +010072struct list servers_list = LIST_HEAD_INIT(servers_list);
Olivier Houchard9ea5d362019-02-14 18:29:09 +010073
Frédéric Lécaille7da71292019-05-20 09:47:07 +020074/* The server names dictionary */
Thayne McCombs92149f92020-11-20 01:28:26 -070075struct dict server_key_dict = {
76 .name = "server keys",
Frédéric Lécaille7da71292019-05-20 09:47:07 +020077 .values = EB_ROOT_UNIQUE,
78};
79
Simon Hormana3608442013-11-01 16:46:15 +090080int srv_downtime(const struct server *s)
Willy Tarreau21faa912012-10-10 08:27:36 +020081{
Amaury Denoyellee6ba7912020-10-29 15:59:05 +010082 if ((s->cur_state != SRV_ST_STOPPED) || s->last_change >= now.tv_sec) // ignore negative time
Krzysztof Oledzki85130942007-10-22 16:21:10 +020083 return s->down_time;
84
85 return now.tv_sec - s->last_change + s->down_time;
86}
Willy Tarreaubaaee002006-06-26 02:48:02 +020087
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -050088int srv_lastsession(const struct server *s)
89{
90 if (s->counters.last_sess)
91 return now.tv_sec - s->counters.last_sess;
92
93 return -1;
94}
95
Simon Horman4a741432013-02-23 15:35:38 +090096int srv_getinter(const struct check *check)
Willy Tarreau21faa912012-10-10 08:27:36 +020097{
Simon Horman4a741432013-02-23 15:35:38 +090098 const struct server *s = check->server;
99
Willy Tarreauff5ae352013-12-11 20:36:34 +0100100 if ((check->state & CHK_ST_CONFIGURED) && (check->health == check->rise + check->fall - 1))
Simon Horman4a741432013-02-23 15:35:38 +0900101 return check->inter;
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100102
Emeric Brun52a91d32017-08-31 14:41:55 +0200103 if ((s->next_state == SRV_ST_STOPPED) && check->health == 0)
Simon Horman4a741432013-02-23 15:35:38 +0900104 return (check->downinter)?(check->downinter):(check->inter);
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100105
Simon Horman4a741432013-02-23 15:35:38 +0900106 return (check->fastinter)?(check->fastinter):(check->inter);
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100107}
108
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100109/*
110 * Check that we did not get a hash collision.
Willy Tarreau595e7672020-10-20 17:30:08 +0200111 * Unlikely, but it can happen. The server's proxy must be at least
112 * read-locked.
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100113 */
114static inline void srv_check_for_dup_dyncookie(struct server *s)
Olivier Houchard4e694042017-03-14 20:01:29 +0100115{
116 struct proxy *p = s->proxy;
117 struct server *tmpserv;
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100118
119 for (tmpserv = p->srv; tmpserv != NULL;
120 tmpserv = tmpserv->next) {
121 if (tmpserv == s)
122 continue;
123 if (tmpserv->next_admin & SRV_ADMF_FMAINT)
124 continue;
125 if (tmpserv->cookie &&
126 strcmp(tmpserv->cookie, s->cookie) == 0) {
127 ha_warning("We generated two equal cookies for two different servers.\n"
128 "Please change the secret key for '%s'.\n",
129 s->proxy->id);
130 }
131 }
132
133}
134
Willy Tarreau46b7f532018-08-21 11:54:26 +0200135/*
Willy Tarreau595e7672020-10-20 17:30:08 +0200136 * Must be called with the server lock held, and will read-lock the proxy.
Willy Tarreau46b7f532018-08-21 11:54:26 +0200137 */
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100138void srv_set_dyncookie(struct server *s)
139{
140 struct proxy *p = s->proxy;
Olivier Houchard4e694042017-03-14 20:01:29 +0100141 char *tmpbuf;
142 unsigned long long hash_value;
Olivier Houchard2cb49eb2017-03-15 15:11:06 +0100143 size_t key_len;
Olivier Houchard4e694042017-03-14 20:01:29 +0100144 size_t buffer_len;
145 int addr_len;
146 int port;
147
Willy Tarreau595e7672020-10-20 17:30:08 +0200148 HA_RWLOCK_RDLOCK(PROXY_LOCK, &p->lock);
Willy Tarreau5e83d992019-07-30 11:59:34 +0200149
Olivier Houchard4e694042017-03-14 20:01:29 +0100150 if ((s->flags & SRV_F_COOKIESET) ||
151 !(s->proxy->ck_opts & PR_CK_DYNAMIC) ||
152 s->proxy->dyncookie_key == NULL)
Willy Tarreau5e83d992019-07-30 11:59:34 +0200153 goto out;
Olivier Houchard2cb49eb2017-03-15 15:11:06 +0100154 key_len = strlen(p->dyncookie_key);
Olivier Houchard4e694042017-03-14 20:01:29 +0100155
156 if (s->addr.ss_family != AF_INET &&
157 s->addr.ss_family != AF_INET6)
Willy Tarreau5e83d992019-07-30 11:59:34 +0200158 goto out;
Olivier Houchard4e694042017-03-14 20:01:29 +0100159 /*
160 * Buffer to calculate the cookie value.
161 * The buffer contains the secret key + the server IP address
162 * + the TCP port.
163 */
164 addr_len = (s->addr.ss_family == AF_INET) ? 4 : 16;
165 /*
166 * The TCP port should use only 2 bytes, but is stored in
167 * an unsigned int in struct server, so let's use 4, to be
168 * on the safe side.
169 */
170 buffer_len = key_len + addr_len + 4;
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200171 tmpbuf = trash.area;
Olivier Houchard4e694042017-03-14 20:01:29 +0100172 memcpy(tmpbuf, p->dyncookie_key, key_len);
173 memcpy(&(tmpbuf[key_len]),
174 s->addr.ss_family == AF_INET ?
175 (void *)&((struct sockaddr_in *)&s->addr)->sin_addr.s_addr :
176 (void *)&(((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr),
177 addr_len);
178 /*
179 * Make sure it's the same across all the load balancers,
180 * no matter their endianness.
181 */
182 port = htonl(s->svc_port);
183 memcpy(&tmpbuf[key_len + addr_len], &port, 4);
184 hash_value = XXH64(tmpbuf, buffer_len, 0);
185 memprintf(&s->cookie, "%016llx", hash_value);
186 if (!s->cookie)
Willy Tarreau5e83d992019-07-30 11:59:34 +0200187 goto out;
Olivier Houchard4e694042017-03-14 20:01:29 +0100188 s->cklen = 16;
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100189
190 /* Don't bother checking if the dyncookie is duplicated if
191 * the server is marked as "disabled", maybe it doesn't have
192 * its real IP yet, but just a place holder.
Olivier Houchard4e694042017-03-14 20:01:29 +0100193 */
Olivier Houcharde9bad0a2018-01-17 17:39:34 +0100194 if (!(s->next_admin & SRV_ADMF_FMAINT))
195 srv_check_for_dup_dyncookie(s);
Willy Tarreau5e83d992019-07-30 11:59:34 +0200196 out:
Willy Tarreau595e7672020-10-20 17:30:08 +0200197 HA_RWLOCK_RDUNLOCK(PROXY_LOCK, &p->lock);
Olivier Houchard4e694042017-03-14 20:01:29 +0100198}
199
Willy Tarreau21faa912012-10-10 08:27:36 +0200200/*
Amaury Denoyelle2f70bb52021-06-08 15:19:51 +0200201 * Must be called with the server lock held. The server is first removed from
202 * the proxy tree if it was already attached. If <reattach> is true, the server
203 * will then be attached in the proxy tree. The proxy lock is held to
204 * manipulate the tree.
Thayne McCombs92149f92020-11-20 01:28:26 -0700205 */
Amaury Denoyelle2f70bb52021-06-08 15:19:51 +0200206static void srv_set_addr_desc(struct server *s, int reattach)
Thayne McCombs92149f92020-11-20 01:28:26 -0700207{
208 struct proxy *p = s->proxy;
209 char *key;
210
211 key = sa2str(&s->addr, s->svc_port, s->flags & SRV_F_MAPPORTS);
212
213 if (s->addr_node.key) {
Thayne McCombs24da7e12021-01-05 23:10:09 -0700214 if (key && strcmp(key, s->addr_node.key) == 0) {
Thayne McCombs92149f92020-11-20 01:28:26 -0700215 free(key);
216 return;
217 }
218
219 HA_RWLOCK_WRLOCK(PROXY_LOCK, &p->lock);
220 ebpt_delete(&s->addr_node);
221 HA_RWLOCK_WRUNLOCK(PROXY_LOCK, &p->lock);
222
223 free(s->addr_node.key);
224 }
225
226 s->addr_node.key = key;
227
Amaury Denoyelle2f70bb52021-06-08 15:19:51 +0200228 if (reattach) {
229 if (s->addr_node.key) {
230 HA_RWLOCK_WRLOCK(PROXY_LOCK, &p->lock);
231 ebis_insert(&p->used_server_addr, &s->addr_node);
232 HA_RWLOCK_WRUNLOCK(PROXY_LOCK, &p->lock);
233 }
Thayne McCombs24da7e12021-01-05 23:10:09 -0700234 }
Thayne McCombs92149f92020-11-20 01:28:26 -0700235}
236
237/*
Willy Tarreau21faa912012-10-10 08:27:36 +0200238 * Registers the server keyword list <kwl> as a list of valid keywords for next
239 * parsing sessions.
240 */
241void srv_register_keywords(struct srv_kw_list *kwl)
242{
Willy Tarreau2b718102021-04-21 07:32:39 +0200243 LIST_APPEND(&srv_keywords.list, &kwl->list);
Willy Tarreau21faa912012-10-10 08:27:36 +0200244}
245
246/* Return a pointer to the server keyword <kw>, or NULL if not found. If the
247 * keyword is found with a NULL ->parse() function, then an attempt is made to
248 * find one with a valid ->parse() function. This way it is possible to declare
249 * platform-dependant, known keywords as NULL, then only declare them as valid
250 * if some options are met. Note that if the requested keyword contains an
251 * opening parenthesis, everything from this point is ignored.
252 */
253struct srv_kw *srv_find_kw(const char *kw)
254{
255 int index;
256 const char *kwend;
257 struct srv_kw_list *kwl;
258 struct srv_kw *ret = NULL;
259
260 kwend = strchr(kw, '(');
261 if (!kwend)
262 kwend = kw + strlen(kw);
263
264 list_for_each_entry(kwl, &srv_keywords.list, list) {
265 for (index = 0; kwl->kw[index].kw != NULL; index++) {
266 if ((strncmp(kwl->kw[index].kw, kw, kwend - kw) == 0) &&
267 kwl->kw[index].kw[kwend-kw] == 0) {
268 if (kwl->kw[index].parse)
269 return &kwl->kw[index]; /* found it !*/
270 else
271 ret = &kwl->kw[index]; /* may be OK */
272 }
273 }
274 }
275 return ret;
276}
277
278/* Dumps all registered "server" keywords to the <out> string pointer. The
279 * unsupported keywords are only dumped if their supported form was not
280 * found.
281 */
282void srv_dump_kws(char **out)
283{
284 struct srv_kw_list *kwl;
285 int index;
286
Christopher Faulet784063e2020-05-18 12:14:18 +0200287 if (!out)
288 return;
289
Willy Tarreau21faa912012-10-10 08:27:36 +0200290 *out = NULL;
291 list_for_each_entry(kwl, &srv_keywords.list, list) {
292 for (index = 0; kwl->kw[index].kw != NULL; index++) {
293 if (kwl->kw[index].parse ||
294 srv_find_kw(kwl->kw[index].kw) == &kwl->kw[index]) {
295 memprintf(out, "%s[%4s] %s%s%s%s\n", *out ? *out : "",
296 kwl->scope,
297 kwl->kw[index].kw,
298 kwl->kw[index].skip ? " <arg>" : "",
299 kwl->kw[index].default_ok ? " [dflt_ok]" : "",
300 kwl->kw[index].parse ? "" : " (not supported)");
301 }
302 }
303 }
Willy Tarreau49c2b452021-03-12 09:58:04 +0100304}
305
306/* Try to find in srv_keyword the word that looks closest to <word> by counting
307 * transitions between letters, digits and other characters. Will return the
308 * best matching word if found, otherwise NULL. An optional array of extra
309 * words to compare may be passed in <extra>, but it must then be terminated
310 * by a NULL entry. If unused it may be NULL.
311 */
312static const char *srv_find_best_kw(const char *word)
313{
314 uint8_t word_sig[1024];
315 uint8_t list_sig[1024];
316 const struct srv_kw_list *kwl;
317 const char *best_ptr = NULL;
318 int dist, best_dist = INT_MAX;
319 const char **extra;
320 int index;
321
322 make_word_fingerprint(word_sig, word);
323 list_for_each_entry(kwl, &srv_keywords.list, list) {
324 for (index = 0; kwl->kw[index].kw != NULL; index++) {
325 make_word_fingerprint(list_sig, kwl->kw[index].kw);
326 dist = word_fingerprint_distance(word_sig, list_sig);
327 if (dist < best_dist) {
328 best_dist = dist;
329 best_ptr = kwl->kw[index].kw;
330 }
331 }
332 }
333
Amaury Denoyelle587b71e2021-03-10 16:36:02 +0100334 for (extra = extra_kw_list; *extra; extra++) {
Willy Tarreau49c2b452021-03-12 09:58:04 +0100335 make_word_fingerprint(list_sig, *extra);
336 dist = word_fingerprint_distance(word_sig, list_sig);
337 if (dist < best_dist) {
338 best_dist = dist;
339 best_ptr = *extra;
340 }
Willy Tarreau49c2b452021-03-12 09:58:04 +0100341 }
342
343 if (best_dist > 2 * strlen(word) || (best_ptr && best_dist > 2 * strlen(best_ptr)))
344 best_ptr = NULL;
345
346 return best_ptr;
Willy Tarreau21faa912012-10-10 08:27:36 +0200347}
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100348
Frédéric Lécaillef5bf9032017-03-10 11:51:05 +0100349/* Parse the "backup" server keyword */
350static int srv_parse_backup(char **args, int *cur_arg,
351 struct proxy *curproxy, struct server *newsrv, char **err)
352{
353 newsrv->flags |= SRV_F_BACKUP;
354 return 0;
355}
356
Alexander Liu2a54bb72019-05-22 19:44:48 +0800357
Frédéric Lécaille9d1b95b2017-03-15 09:13:33 +0100358/* Parse the "cookie" server keyword */
359static int srv_parse_cookie(char **args, int *cur_arg,
360 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 free(newsrv->cookie);
371 newsrv->cookie = strdup(arg);
372 newsrv->cklen = strlen(arg);
373 newsrv->flags |= SRV_F_COOKIESET;
374 return 0;
375}
376
Frédéric Lécaille2a0d0612017-03-21 11:53:54 +0100377/* Parse the "disabled" server keyword */
378static int srv_parse_disabled(char **args, int *cur_arg,
379 struct proxy *curproxy, struct server *newsrv, char **err)
380{
Emeric Brun52a91d32017-08-31 14:41:55 +0200381 newsrv->next_admin |= SRV_ADMF_CMAINT | SRV_ADMF_FMAINT;
382 newsrv->next_state = SRV_ST_STOPPED;
Frédéric Lécaille2a0d0612017-03-21 11:53:54 +0100383 newsrv->check.state |= CHK_ST_PAUSED;
384 newsrv->check.health = 0;
385 return 0;
386}
387
388/* Parse the "enabled" server keyword */
389static int srv_parse_enabled(char **args, int *cur_arg,
390 struct proxy *curproxy, struct server *newsrv, char **err)
391{
Emeric Brun52a91d32017-08-31 14:41:55 +0200392 newsrv->next_admin &= ~SRV_ADMF_CMAINT & ~SRV_ADMF_FMAINT;
393 newsrv->next_state = SRV_ST_RUNNING;
Frédéric Lécaille2a0d0612017-03-21 11:53:54 +0100394 newsrv->check.state &= ~CHK_ST_PAUSED;
395 newsrv->check.health = newsrv->check.rise;
396 return 0;
397}
398
Amaury Denoyelle587b71e2021-03-10 16:36:02 +0100399/* Parse the "error-limit" server keyword */
400static int srv_parse_error_limit(char **args, int *cur_arg,
401 struct proxy *curproxy, struct server *newsrv, char **err)
402{
403 if (!*args[*cur_arg + 1]) {
404 memprintf(err, "'%s' expects an integer argument.",
405 args[*cur_arg]);
406 return ERR_ALERT | ERR_FATAL;
407 }
408
409 newsrv->consecutive_errors_limit = atoi(args[*cur_arg + 1]);
410
411 if (newsrv->consecutive_errors_limit <= 0) {
412 memprintf(err, "%s has to be > 0.",
413 args[*cur_arg]);
414 return ERR_ALERT | ERR_FATAL;
415 }
416
417 return 0;
418}
419
420/* Parse the "init-addr" server keyword */
421static int srv_parse_init_addr(char **args, int *cur_arg,
422 struct proxy *curproxy, struct server *newsrv, char **err)
423{
424 char *p, *end;
425 int done;
426 struct sockaddr_storage sa;
427
428 newsrv->init_addr_methods = 0;
429 memset(&newsrv->init_addr, 0, sizeof(newsrv->init_addr));
430
431 for (p = args[*cur_arg + 1]; *p; p = end) {
432 /* cut on next comma */
433 for (end = p; *end && *end != ','; end++);
434 if (*end)
435 *(end++) = 0;
436
437 memset(&sa, 0, sizeof(sa));
438 if (strcmp(p, "libc") == 0) {
439 done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_LIBC);
440 }
441 else if (strcmp(p, "last") == 0) {
442 done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_LAST);
443 }
444 else if (strcmp(p, "none") == 0) {
445 done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_NONE);
446 }
447 else if (str2ip2(p, &sa, 0)) {
448 if (is_addr(&newsrv->init_addr)) {
449 memprintf(err, "'%s' : initial address already specified, cannot add '%s'.",
450 args[*cur_arg], p);
451 return ERR_ALERT | ERR_FATAL;
452 }
453 newsrv->init_addr = sa;
454 done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_IP);
455 }
456 else {
457 memprintf(err, "'%s' : unknown init-addr method '%s', supported methods are 'libc', 'last', 'none'.",
458 args[*cur_arg], p);
459 return ERR_ALERT | ERR_FATAL;
460 }
461 if (!done) {
462 memprintf(err, "'%s' : too many init-addr methods when trying to add '%s'",
463 args[*cur_arg], p);
464 return ERR_ALERT | ERR_FATAL;
465 }
466 }
467
468 return 0;
469}
470
471/* Parse the "log-proto" server keyword */
472static int srv_parse_log_proto(char **args, int *cur_arg,
473 struct proxy *curproxy, struct server *newsrv, char **err)
474{
475 if (strcmp(args[*cur_arg + 1], "legacy") == 0)
476 newsrv->log_proto = SRV_LOG_PROTO_LEGACY;
477 else if (strcmp(args[*cur_arg + 1], "octet-count") == 0)
478 newsrv->log_proto = SRV_LOG_PROTO_OCTET_COUNTING;
479 else {
480 memprintf(err, "'%s' expects one of 'legacy' or 'octet-count' but got '%s'",
481 args[*cur_arg], args[*cur_arg + 1]);
482 return ERR_ALERT | ERR_FATAL;
483 }
484
485 return 0;
486}
487
488/* Parse the "maxconn" server keyword */
489static int srv_parse_maxconn(char **args, int *cur_arg,
490 struct proxy *curproxy, struct server *newsrv, char **err)
491{
492 newsrv->maxconn = atol(args[*cur_arg + 1]);
493 return 0;
494}
495
496/* Parse the "maxqueue" server keyword */
497static int srv_parse_maxqueue(char **args, int *cur_arg,
498 struct proxy *curproxy, struct server *newsrv, char **err)
499{
500 newsrv->maxqueue = atol(args[*cur_arg + 1]);
501 return 0;
502}
503
504/* Parse the "minconn" server keyword */
505static int srv_parse_minconn(char **args, int *cur_arg,
506 struct proxy *curproxy, struct server *newsrv, char **err)
507{
508 newsrv->minconn = atol(args[*cur_arg + 1]);
509 return 0;
510}
511
Willy Tarreau9c538e02019-01-23 10:21:49 +0100512static int srv_parse_max_reuse(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
513{
514 char *arg;
515
516 arg = args[*cur_arg + 1];
517 if (!*arg) {
518 memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
519 return ERR_ALERT | ERR_FATAL;
520 }
521 newsrv->max_reuse = atoi(arg);
522
523 return 0;
524}
525
Olivier Houchardb7b3faa2018-12-14 18:15:36 +0100526static 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 +0100527{
528 const char *res;
529 char *arg;
530 unsigned int time;
531
532 arg = args[*cur_arg + 1];
533 if (!*arg) {
534 memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
535 return ERR_ALERT | ERR_FATAL;
536 }
537 res = parse_time_err(arg, &time, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +0200538 if (res == PARSE_TIME_OVER) {
539 memprintf(err, "timer overflow in argument '%s' to '%s' (maximum value is 2147483647 ms or ~24.8 days)",
540 args[*cur_arg+1], args[*cur_arg]);
541 return ERR_ALERT | ERR_FATAL;
542 }
543 else if (res == PARSE_TIME_UNDER) {
544 memprintf(err, "timer underflow in argument '%s' to '%s' (minimum non-null value is 1 ms)",
545 args[*cur_arg+1], args[*cur_arg]);
546 return ERR_ALERT | ERR_FATAL;
547 }
548 else if (res) {
Olivier Houchard0c18a6f2018-12-02 14:11:41 +0100549 memprintf(err, "unexpected character '%c' in argument to <%s>.\n",
550 *res, args[*cur_arg]);
551 return ERR_ALERT | ERR_FATAL;
552 }
Olivier Houchardb7b3faa2018-12-14 18:15:36 +0100553 newsrv->pool_purge_delay = time;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +0100554
555 return 0;
556}
557
Willy Tarreau2f3f4d32020-07-01 07:43:51 +0200558static int srv_parse_pool_low_conn(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
559{
560 char *arg;
561
562 arg = args[*cur_arg + 1];
563 if (!*arg) {
564 memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
565 return ERR_ALERT | ERR_FATAL;
566 }
567
568 newsrv->low_idle_conns = atoi(arg);
569 return 0;
570}
571
Olivier Houchard006e3102018-12-10 18:30:32 +0100572static int srv_parse_pool_max_conn(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
573{
574 char *arg;
575
576 arg = args[*cur_arg + 1];
577 if (!*arg) {
578 memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
579 return ERR_ALERT | ERR_FATAL;
580 }
Willy Tarreaucb923d52019-01-23 10:39:27 +0100581
Olivier Houchard006e3102018-12-10 18:30:32 +0100582 newsrv->max_idle_conns = atoi(arg);
Willy Tarreaucb923d52019-01-23 10:39:27 +0100583 if ((int)newsrv->max_idle_conns < -1) {
584 memprintf(err, "'%s' must be >= -1", args[*cur_arg]);
585 return ERR_ALERT | ERR_FATAL;
586 }
Olivier Houchard006e3102018-12-10 18:30:32 +0100587
588 return 0;
589}
590
Willy Tarreaudff55432012-10-10 17:51:05 +0200591/* parse the "id" server keyword */
592static int srv_parse_id(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
593{
594 struct eb32_node *node;
595
596 if (!*args[*cur_arg + 1]) {
597 memprintf(err, "'%s' : expects an integer argument", args[*cur_arg]);
598 return ERR_ALERT | ERR_FATAL;
599 }
600
601 newsrv->puid = atol(args[*cur_arg + 1]);
602 newsrv->conf.id.key = newsrv->puid;
603
604 if (newsrv->puid <= 0) {
605 memprintf(err, "'%s' : custom id has to be > 0", args[*cur_arg]);
606 return ERR_ALERT | ERR_FATAL;
607 }
608
609 node = eb32_lookup(&curproxy->conf.used_server_id, newsrv->puid);
610 if (node) {
611 struct server *target = container_of(node, struct server, conf.id);
612 memprintf(err, "'%s' : custom id %d already used at %s:%d ('server %s')",
613 args[*cur_arg], newsrv->puid, target->conf.file, target->conf.line,
614 target->id);
615 return ERR_ALERT | ERR_FATAL;
616 }
617
Baptiste Assmann7cc419a2015-07-07 22:02:20 +0200618 newsrv->flags |= SRV_F_FORCED_ID;
Willy Tarreaudff55432012-10-10 17:51:05 +0200619 return 0;
620}
621
Frédéric Lécaille22f41a22017-03-16 17:17:36 +0100622/* Parse the "namespace" server keyword */
623static int srv_parse_namespace(char **args, int *cur_arg,
624 struct proxy *curproxy, struct server *newsrv, char **err)
625{
Willy Tarreaue5733232019-05-22 19:24:06 +0200626#ifdef USE_NS
Frédéric Lécaille22f41a22017-03-16 17:17:36 +0100627 char *arg;
628
629 arg = args[*cur_arg + 1];
630 if (!*arg) {
631 memprintf(err, "'%s' : expects <name> as argument", args[*cur_arg]);
632 return ERR_ALERT | ERR_FATAL;
633 }
634
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100635 if (strcmp(arg, "*") == 0) {
Frédéric Lécaille22f41a22017-03-16 17:17:36 +0100636 /* Use the namespace associated with the connection (if present). */
637 newsrv->flags |= SRV_F_USE_NS_FROM_PP;
638 return 0;
639 }
640
641 /*
642 * As this parser may be called several times for the same 'default-server'
643 * object, or for a new 'server' instance deriving from a 'default-server'
644 * one with SRV_F_USE_NS_FROM_PP flag enabled, let's reset it.
645 */
646 newsrv->flags &= ~SRV_F_USE_NS_FROM_PP;
647
648 newsrv->netns = netns_store_lookup(arg, strlen(arg));
649 if (!newsrv->netns)
650 newsrv->netns = netns_store_insert(arg);
651
652 if (!newsrv->netns) {
653 memprintf(err, "Cannot open namespace '%s'", arg);
654 return ERR_ALERT | ERR_FATAL;
655 }
656
657 return 0;
658#else
659 memprintf(err, "'%s': '%s' option not implemented", args[0], args[*cur_arg]);
660 return ERR_ALERT | ERR_FATAL;
661#endif
662}
663
Frédéric Lécaillef5bf9032017-03-10 11:51:05 +0100664/* Parse the "no-backup" server keyword */
665static int srv_parse_no_backup(char **args, int *cur_arg,
666 struct proxy *curproxy, struct server *newsrv, char **err)
667{
668 newsrv->flags &= ~SRV_F_BACKUP;
669 return 0;
670}
671
Frédéric Lécaille25df8902017-03-10 14:04:31 +0100672
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100673/* Disable server PROXY protocol flags. */
Willy Tarreau0e492e22019-04-15 21:25:03 +0200674static inline int srv_disable_pp_flags(struct server *srv, unsigned int flags)
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100675{
676 srv->pp_opts &= ~flags;
677 return 0;
678}
679
680/* Parse the "no-send-proxy" server keyword */
681static int srv_parse_no_send_proxy(char **args, int *cur_arg,
682 struct proxy *curproxy, struct server *newsrv, char **err)
683{
684 return srv_disable_pp_flags(newsrv, SRV_PP_V1);
685}
686
687/* Parse the "no-send-proxy-v2" server keyword */
688static int srv_parse_no_send_proxy_v2(char **args, int *cur_arg,
689 struct proxy *curproxy, struct server *newsrv, char **err)
690{
691 return srv_disable_pp_flags(newsrv, SRV_PP_V2);
692}
693
Frédéric Lécaille1b9423d2019-07-04 14:19:06 +0200694/* Parse the "no-tfo" server keyword */
695static int srv_parse_no_tfo(char **args, int *cur_arg,
696 struct proxy *curproxy, struct server *newsrv, char **err)
697{
698 newsrv->flags &= ~SRV_F_FASTOPEN;
699 return 0;
700}
701
Frédéric Lécaillef9bc1d62017-03-10 15:50:49 +0100702/* Parse the "non-stick" server keyword */
703static int srv_parse_non_stick(char **args, int *cur_arg,
704 struct proxy *curproxy, struct server *newsrv, char **err)
705{
706 newsrv->flags |= SRV_F_NON_STICK;
707 return 0;
708}
709
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100710/* Enable server PROXY protocol flags. */
Willy Tarreau0e492e22019-04-15 21:25:03 +0200711static inline int srv_enable_pp_flags(struct server *srv, unsigned int flags)
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100712{
713 srv->pp_opts |= flags;
714 return 0;
715}
Christopher Faulet8ed0a3e2018-04-10 14:45:45 +0200716/* parse the "proto" server keyword */
717static int srv_parse_proto(char **args, int *cur_arg,
718 struct proxy *px, struct server *newsrv, char **err)
719{
720 struct ist proto;
721
722 if (!*args[*cur_arg + 1]) {
723 memprintf(err, "'%s' : missing value", args[*cur_arg]);
724 return ERR_ALERT | ERR_FATAL;
725 }
Tim Duesterhusdcf753a2021-03-04 17:31:47 +0100726 proto = ist(args[*cur_arg + 1]);
Christopher Faulet8ed0a3e2018-04-10 14:45:45 +0200727 newsrv->mux_proto = get_mux_proto(proto);
728 if (!newsrv->mux_proto) {
729 memprintf(err, "'%s' : unknown MUX protocol '%s'", args[*cur_arg], args[*cur_arg+1]);
730 return ERR_ALERT | ERR_FATAL;
731 }
Christopher Faulet8ed0a3e2018-04-10 14:45:45 +0200732 return 0;
733}
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100734
Emmanuel Hocdetf643b802018-02-01 15:20:32 +0100735/* parse the "proxy-v2-options" */
736static int srv_parse_proxy_v2_options(char **args, int *cur_arg,
737 struct proxy *px, struct server *newsrv, char **err)
738{
739 char *p, *n;
740 for (p = args[*cur_arg+1]; p; p = n) {
741 n = strchr(p, ',');
742 if (n)
743 *n++ = '\0';
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100744 if (strcmp(p, "ssl") == 0) {
Emmanuel Hocdetf643b802018-02-01 15:20:32 +0100745 newsrv->pp_opts |= SRV_PP_V2_SSL;
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100746 } else if (strcmp(p, "cert-cn") == 0) {
Emmanuel Hocdetf643b802018-02-01 15:20:32 +0100747 newsrv->pp_opts |= SRV_PP_V2_SSL;
748 newsrv->pp_opts |= SRV_PP_V2_SSL_CN;
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100749 } else if (strcmp(p, "cert-key") == 0) {
Emmanuel Hocdetfa8d0f12018-02-01 15:53:52 +0100750 newsrv->pp_opts |= SRV_PP_V2_SSL;
751 newsrv->pp_opts |= SRV_PP_V2_SSL_KEY_ALG;
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100752 } else if (strcmp(p, "cert-sig") == 0) {
Emmanuel Hocdetfa8d0f12018-02-01 15:53:52 +0100753 newsrv->pp_opts |= SRV_PP_V2_SSL;
754 newsrv->pp_opts |= SRV_PP_V2_SSL_SIG_ALG;
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100755 } else if (strcmp(p, "ssl-cipher") == 0) {
Emmanuel Hocdetfa8d0f12018-02-01 15:53:52 +0100756 newsrv->pp_opts |= SRV_PP_V2_SSL;
757 newsrv->pp_opts |= SRV_PP_V2_SSL_CIPHER;
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100758 } else if (strcmp(p, "authority") == 0) {
Emmanuel Hocdet253c3b72018-02-01 18:29:59 +0100759 newsrv->pp_opts |= SRV_PP_V2_AUTHORITY;
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100760 } else if (strcmp(p, "crc32c") == 0) {
Emmanuel Hocdet4399c752018-02-05 15:26:43 +0100761 newsrv->pp_opts |= SRV_PP_V2_CRC32C;
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100762 } else if (strcmp(p, "unique-id") == 0) {
Tim Duesterhuscf6e0c82020-03-13 12:34:24 +0100763 newsrv->pp_opts |= SRV_PP_V2_UNIQUE_ID;
Emmanuel Hocdetf643b802018-02-01 15:20:32 +0100764 } else
765 goto fail;
766 }
767 return 0;
768 fail:
769 if (err)
770 memprintf(err, "'%s' : proxy v2 option not implemented", p);
771 return ERR_ALERT | ERR_FATAL;
772}
773
Frédéric Lécaille547356e2017-03-15 08:55:39 +0100774/* Parse the "observe" server keyword */
775static int srv_parse_observe(char **args, int *cur_arg,
776 struct proxy *curproxy, struct server *newsrv, char **err)
777{
778 char *arg;
779
780 arg = args[*cur_arg + 1];
781 if (!*arg) {
782 memprintf(err, "'%s' expects <mode> as argument.\n", args[*cur_arg]);
783 return ERR_ALERT | ERR_FATAL;
784 }
785
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100786 if (strcmp(arg, "none") == 0) {
Frédéric Lécaille547356e2017-03-15 08:55:39 +0100787 newsrv->observe = HANA_OBS_NONE;
788 }
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100789 else if (strcmp(arg, "layer4") == 0) {
Frédéric Lécaille547356e2017-03-15 08:55:39 +0100790 newsrv->observe = HANA_OBS_LAYER4;
791 }
Tim Duesterhuse5ff1412021-01-02 22:31:53 +0100792 else if (strcmp(arg, "layer7") == 0) {
Frédéric Lécaille547356e2017-03-15 08:55:39 +0100793 if (curproxy->mode != PR_MODE_HTTP) {
794 memprintf(err, "'%s' can only be used in http proxies.\n", arg);
795 return ERR_ALERT;
796 }
797 newsrv->observe = HANA_OBS_LAYER7;
798 }
799 else {
800 memprintf(err, "'%s' expects one of 'none', 'layer4', 'layer7' "
801 "but got '%s'\n", args[*cur_arg], arg);
802 return ERR_ALERT | ERR_FATAL;
803 }
804
805 return 0;
806}
807
Amaury Denoyelle587b71e2021-03-10 16:36:02 +0100808/* Parse the "on-error" server keyword */
809static int srv_parse_on_error(char **args, int *cur_arg,
810 struct proxy *curproxy, struct server *newsrv, char **err)
811{
812 if (strcmp(args[*cur_arg + 1], "fastinter") == 0)
813 newsrv->onerror = HANA_ONERR_FASTINTER;
814 else if (strcmp(args[*cur_arg + 1], "fail-check") == 0)
815 newsrv->onerror = HANA_ONERR_FAILCHK;
816 else if (strcmp(args[*cur_arg + 1], "sudden-death") == 0)
817 newsrv->onerror = HANA_ONERR_SUDDTH;
818 else if (strcmp(args[*cur_arg + 1], "mark-down") == 0)
819 newsrv->onerror = HANA_ONERR_MARKDWN;
820 else {
821 memprintf(err, "'%s' expects one of 'fastinter', "
822 "'fail-check', 'sudden-death' or 'mark-down' but got '%s'",
823 args[*cur_arg], args[*cur_arg + 1]);
824 return ERR_ALERT | ERR_FATAL;
825 }
826
827 return 0;
828}
829
830/* Parse the "on-marked-down" server keyword */
831static int srv_parse_on_marked_down(char **args, int *cur_arg,
832 struct proxy *curproxy, struct server *newsrv, char **err)
833{
834 if (strcmp(args[*cur_arg + 1], "shutdown-sessions") == 0)
835 newsrv->onmarkeddown = HANA_ONMARKEDDOWN_SHUTDOWNSESSIONS;
836 else {
837 memprintf(err, "'%s' expects 'shutdown-sessions' but got '%s'",
838 args[*cur_arg], args[*cur_arg + 1]);
839 return ERR_ALERT | ERR_FATAL;
840 }
841
842 return 0;
843}
844
845/* Parse the "on-marked-up" server keyword */
846static int srv_parse_on_marked_up(char **args, int *cur_arg,
847 struct proxy *curproxy, struct server *newsrv, char **err)
848{
849 if (strcmp(args[*cur_arg + 1], "shutdown-backup-sessions") == 0)
850 newsrv->onmarkedup = HANA_ONMARKEDUP_SHUTDOWNBACKUPSESSIONS;
851 else {
852 memprintf(err, "'%s' expects 'shutdown-backup-sessions' but got '%s'",
853 args[*cur_arg], args[*cur_arg + 1]);
854 return ERR_ALERT | ERR_FATAL;
855 }
856
857 return 0;
858}
859
Frédéric Lécaille16186232017-03-14 16:42:49 +0100860/* Parse the "redir" server keyword */
861static int srv_parse_redir(char **args, int *cur_arg,
862 struct proxy *curproxy, struct server *newsrv, char **err)
863{
864 char *arg;
865
866 arg = args[*cur_arg + 1];
867 if (!*arg) {
868 memprintf(err, "'%s' expects <prefix> as argument.\n", args[*cur_arg]);
869 return ERR_ALERT | ERR_FATAL;
870 }
871
872 free(newsrv->rdr_pfx);
873 newsrv->rdr_pfx = strdup(arg);
874 newsrv->rdr_len = strlen(arg);
875
876 return 0;
877}
878
Amaury Denoyelle587b71e2021-03-10 16:36:02 +0100879/* Parse the "resolvers" server keyword */
880static int srv_parse_resolvers(char **args, int *cur_arg,
881 struct proxy *curproxy, struct server *newsrv, char **err)
882{
883 free(newsrv->resolvers_id);
884 newsrv->resolvers_id = strdup(args[*cur_arg + 1]);
885 return 0;
886}
887
888/* Parse the "resolve-net" server keyword */
889static int srv_parse_resolve_net(char **args, int *cur_arg,
890 struct proxy *curproxy, struct server *newsrv, char **err)
891{
892 char *p, *e;
893 unsigned char mask;
894 struct resolv_options *opt;
895
896 if (!args[*cur_arg + 1] || args[*cur_arg + 1][0] == '\0') {
897 memprintf(err, "'%s' expects a list of networks.",
898 args[*cur_arg]);
899 return ERR_ALERT | ERR_FATAL;
900 }
901
902 opt = &newsrv->resolv_opts;
903
904 /* Split arguments by comma, and convert it from ipv4 or ipv6
905 * string network in in_addr or in6_addr.
906 */
907 p = args[*cur_arg + 1];
908 e = p;
909 while (*p != '\0') {
910 /* If no room available, return error. */
911 if (opt->pref_net_nb >= SRV_MAX_PREF_NET) {
912 memprintf(err, "'%s' exceed %d networks.",
913 args[*cur_arg], SRV_MAX_PREF_NET);
914 return ERR_ALERT | ERR_FATAL;
915 }
916 /* look for end or comma. */
917 while (*e != ',' && *e != '\0')
918 e++;
919 if (*e == ',') {
920 *e = '\0';
921 e++;
922 }
923 if (str2net(p, 0, &opt->pref_net[opt->pref_net_nb].addr.in4,
924 &opt->pref_net[opt->pref_net_nb].mask.in4)) {
925 /* Try to convert input string from ipv4 or ipv6 network. */
926 opt->pref_net[opt->pref_net_nb].family = AF_INET;
927 } else if (str62net(p, &opt->pref_net[opt->pref_net_nb].addr.in6,
928 &mask)) {
929 /* Try to convert input string from ipv6 network. */
930 len2mask6(mask, &opt->pref_net[opt->pref_net_nb].mask.in6);
931 opt->pref_net[opt->pref_net_nb].family = AF_INET6;
932 } else {
933 /* All network conversions fail, return error. */
934 memprintf(err, "'%s' invalid network '%s'.",
935 args[*cur_arg], p);
936 return ERR_ALERT | ERR_FATAL;
937 }
938 opt->pref_net_nb++;
939 p = e;
940 }
941
942 return 0;
943}
944
945/* Parse the "resolve-opts" server keyword */
946static int srv_parse_resolve_opts(char **args, int *cur_arg,
947 struct proxy *curproxy, struct server *newsrv, char **err)
948{
949 char *p, *end;
950
951 for (p = args[*cur_arg + 1]; *p; p = end) {
952 /* cut on next comma */
953 for (end = p; *end && *end != ','; end++);
954 if (*end)
955 *(end++) = 0;
956
957 if (strcmp(p, "allow-dup-ip") == 0) {
958 newsrv->resolv_opts.accept_duplicate_ip = 1;
959 }
960 else if (strcmp(p, "ignore-weight") == 0) {
961 newsrv->resolv_opts.ignore_weight = 1;
962 }
963 else if (strcmp(p, "prevent-dup-ip") == 0) {
964 newsrv->resolv_opts.accept_duplicate_ip = 0;
965 }
966 else {
967 memprintf(err, "'%s' : unknown resolve-opts option '%s', supported methods are 'allow-dup-ip', 'ignore-weight', and 'prevent-dup-ip'.",
968 args[*cur_arg], p);
969 return ERR_ALERT | ERR_FATAL;
970 }
971 }
972
973 return 0;
974}
975
976/* Parse the "resolve-prefer" server keyword */
977static int srv_parse_resolve_prefer(char **args, int *cur_arg,
978 struct proxy *curproxy, struct server *newsrv, char **err)
979{
980 if (strcmp(args[*cur_arg + 1], "ipv4") == 0)
981 newsrv->resolv_opts.family_prio = AF_INET;
982 else if (strcmp(args[*cur_arg + 1], "ipv6") == 0)
983 newsrv->resolv_opts.family_prio = AF_INET6;
984 else {
985 memprintf(err, "'%s' expects either ipv4 or ipv6 as argument.",
986 args[*cur_arg]);
987 return ERR_ALERT | ERR_FATAL;
988 }
989
990 return 0;
991}
992
Frédéric Lécaille31045e42017-03-10 16:40:00 +0100993/* Parse the "send-proxy" server keyword */
994static int srv_parse_send_proxy(char **args, int *cur_arg,
995 struct proxy *curproxy, struct server *newsrv, char **err)
996{
997 return srv_enable_pp_flags(newsrv, SRV_PP_V1);
998}
999
1000/* Parse the "send-proxy-v2" server keyword */
1001static int srv_parse_send_proxy_v2(char **args, int *cur_arg,
1002 struct proxy *curproxy, struct server *newsrv, char **err)
1003{
1004 return srv_enable_pp_flags(newsrv, SRV_PP_V2);
1005}
1006
Amaury Denoyelle587b71e2021-03-10 16:36:02 +01001007/* Parse the "slowstart" server keyword */
1008static int srv_parse_slowstart(char **args, int *cur_arg,
1009 struct proxy *curproxy, struct server *newsrv, char **err)
1010{
1011 /* slowstart is stored in seconds */
1012 unsigned int val;
1013 const char *time_err = parse_time_err(args[*cur_arg + 1], &val, TIME_UNIT_MS);
1014
1015 if (time_err == PARSE_TIME_OVER) {
1016 memprintf(err, "overflow in argument <%s> to <%s> of server %s, maximum value is 2147483647 ms (~24.8 days).",
1017 args[*cur_arg+1], args[*cur_arg], newsrv->id);
1018 return ERR_ALERT | ERR_FATAL;
1019 }
1020 else if (time_err == PARSE_TIME_UNDER) {
1021 memprintf(err, "underflow in argument <%s> to <%s> of server %s, minimum non-null value is 1 ms.",
1022 args[*cur_arg+1], args[*cur_arg], newsrv->id);
1023 return ERR_ALERT | ERR_FATAL;
1024 }
1025 else if (time_err) {
1026 memprintf(err, "unexpected character '%c' in 'slowstart' argument of server %s.",
1027 *time_err, newsrv->id);
1028 return ERR_ALERT | ERR_FATAL;
1029 }
1030 newsrv->slowstart = (val + 999) / 1000;
1031
1032 return 0;
1033}
Frédéric Lécailledba97072017-03-17 15:33:50 +01001034
1035/* Parse the "source" server keyword */
1036static int srv_parse_source(char **args, int *cur_arg,
1037 struct proxy *curproxy, struct server *newsrv, char **err)
1038{
1039 char *errmsg;
1040 int port_low, port_high;
1041 struct sockaddr_storage *sk;
Frédéric Lécailledba97072017-03-17 15:33:50 +01001042
1043 errmsg = NULL;
1044
1045 if (!*args[*cur_arg + 1]) {
1046 memprintf(err, "'%s' expects <addr>[:<port>[-<port>]], and optionally '%s' <addr>, "
1047 "and '%s' <name> as argument.\n", args[*cur_arg], "usesrc", "interface");
1048 goto err;
1049 }
1050
1051 /* 'sk' is statically allocated (no need to be freed). */
Willy Tarreau65ec4e32020-09-16 19:17:08 +02001052 sk = str2sa_range(args[*cur_arg + 1], NULL, &port_low, &port_high, NULL, NULL,
1053 &errmsg, NULL, NULL,
1054 PA_O_RESOLVE | PA_O_PORT_OK | PA_O_PORT_RANGE | PA_O_STREAM | PA_O_CONNECT);
Frédéric Lécailledba97072017-03-17 15:33:50 +01001055 if (!sk) {
1056 memprintf(err, "'%s %s' : %s\n", args[*cur_arg], args[*cur_arg + 1], errmsg);
1057 goto err;
1058 }
1059
Frédéric Lécailledba97072017-03-17 15:33:50 +01001060 newsrv->conn_src.opts |= CO_SRC_BIND;
1061 newsrv->conn_src.source_addr = *sk;
1062
1063 if (port_low != port_high) {
1064 int i;
1065
Frédéric Lécailledba97072017-03-17 15:33:50 +01001066 newsrv->conn_src.sport_range = port_range_alloc_range(port_high - port_low + 1);
Remi Tricot-Le Bretondc187912021-05-12 09:44:06 +02001067 if (!newsrv->conn_src.sport_range) {
1068 ha_alert("Server '%s': Out of memory (sport_range)\n", args[0]);
1069 goto err;
1070 }
Frédéric Lécailledba97072017-03-17 15:33:50 +01001071 for (i = 0; i < newsrv->conn_src.sport_range->size; i++)
1072 newsrv->conn_src.sport_range->ports[i] = port_low + i;
1073 }
1074
1075 *cur_arg += 2;
1076 while (*(args[*cur_arg])) {
Tim Duesterhuse5ff1412021-01-02 22:31:53 +01001077 if (strcmp(args[*cur_arg], "usesrc") == 0) { /* address to use outside */
Frédéric Lécailledba97072017-03-17 15:33:50 +01001078#if defined(CONFIG_HAP_TRANSPARENT)
1079 if (!*args[*cur_arg + 1]) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001080 ha_alert("'usesrc' expects <addr>[:<port>], 'client', 'clientip', "
1081 "or 'hdr_ip(name,#)' as argument.\n");
Frédéric Lécailledba97072017-03-17 15:33:50 +01001082 goto err;
1083 }
Tim Duesterhuse5ff1412021-01-02 22:31:53 +01001084 if (strcmp(args[*cur_arg + 1], "client") == 0) {
Frédéric Lécailledba97072017-03-17 15:33:50 +01001085 newsrv->conn_src.opts &= ~CO_SRC_TPROXY_MASK;
1086 newsrv->conn_src.opts |= CO_SRC_TPROXY_CLI;
1087 }
Tim Duesterhuse5ff1412021-01-02 22:31:53 +01001088 else if (strcmp(args[*cur_arg + 1], "clientip") == 0) {
Frédéric Lécailledba97072017-03-17 15:33:50 +01001089 newsrv->conn_src.opts &= ~CO_SRC_TPROXY_MASK;
1090 newsrv->conn_src.opts |= CO_SRC_TPROXY_CIP;
1091 }
1092 else if (!strncmp(args[*cur_arg + 1], "hdr_ip(", 7)) {
1093 char *name, *end;
1094
1095 name = args[*cur_arg + 1] + 7;
Willy Tarreau90807112020-02-25 08:16:33 +01001096 while (isspace((unsigned char)*name))
Frédéric Lécailledba97072017-03-17 15:33:50 +01001097 name++;
1098
1099 end = name;
Willy Tarreau90807112020-02-25 08:16:33 +01001100 while (*end && !isspace((unsigned char)*end) && *end != ',' && *end != ')')
Frédéric Lécailledba97072017-03-17 15:33:50 +01001101 end++;
1102
1103 newsrv->conn_src.opts &= ~CO_SRC_TPROXY_MASK;
1104 newsrv->conn_src.opts |= CO_SRC_TPROXY_DYN;
1105 free(newsrv->conn_src.bind_hdr_name);
1106 newsrv->conn_src.bind_hdr_name = calloc(1, end - name + 1);
Remi Tricot-Le Bretondc187912021-05-12 09:44:06 +02001107 if (!newsrv->conn_src.bind_hdr_name) {
1108 ha_alert("Server '%s': Out of memory (bind_hdr_name)\n", args[0]);
1109 goto err;
1110 }
Frédéric Lécailledba97072017-03-17 15:33:50 +01001111 newsrv->conn_src.bind_hdr_len = end - name;
1112 memcpy(newsrv->conn_src.bind_hdr_name, name, end - name);
1113 newsrv->conn_src.bind_hdr_name[end - name] = '\0';
1114 newsrv->conn_src.bind_hdr_occ = -1;
1115
1116 /* now look for an occurrence number */
Willy Tarreau90807112020-02-25 08:16:33 +01001117 while (isspace((unsigned char)*end))
Frédéric Lécailledba97072017-03-17 15:33:50 +01001118 end++;
1119 if (*end == ',') {
1120 end++;
1121 name = end;
1122 if (*end == '-')
1123 end++;
Willy Tarreau90807112020-02-25 08:16:33 +01001124 while (isdigit((unsigned char)*end))
Frédéric Lécailledba97072017-03-17 15:33:50 +01001125 end++;
1126 newsrv->conn_src.bind_hdr_occ = strl2ic(name, end - name);
1127 }
1128
1129 if (newsrv->conn_src.bind_hdr_occ < -MAX_HDR_HISTORY) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001130 ha_alert("usesrc hdr_ip(name,num) does not support negative"
1131 " occurrences values smaller than %d.\n", MAX_HDR_HISTORY);
Frédéric Lécailledba97072017-03-17 15:33:50 +01001132 goto err;
1133 }
1134 }
1135 else {
1136 struct sockaddr_storage *sk;
1137 int port1, port2;
1138
1139 /* 'sk' is statically allocated (no need to be freed). */
Willy Tarreau65ec4e32020-09-16 19:17:08 +02001140 sk = str2sa_range(args[*cur_arg + 1], NULL, &port1, &port2, NULL, NULL,
1141 &errmsg, NULL, NULL,
1142 PA_O_RESOLVE | PA_O_PORT_OK | PA_O_STREAM | PA_O_CONNECT);
Frédéric Lécailledba97072017-03-17 15:33:50 +01001143 if (!sk) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001144 ha_alert("'%s %s' : %s\n", args[*cur_arg], args[*cur_arg + 1], errmsg);
Frédéric Lécailledba97072017-03-17 15:33:50 +01001145 goto err;
1146 }
1147
Frédéric Lécailledba97072017-03-17 15:33:50 +01001148 newsrv->conn_src.tproxy_addr = *sk;
1149 newsrv->conn_src.opts |= CO_SRC_TPROXY_ADDR;
1150 }
1151 global.last_checks |= LSTCHK_NETADM;
1152 *cur_arg += 2;
1153 continue;
1154#else /* no TPROXY support */
Christopher Faulet767a84b2017-11-24 16:50:31 +01001155 ha_alert("'usesrc' not allowed here because support for TPROXY was not compiled in.\n");
Frédéric Lécailledba97072017-03-17 15:33:50 +01001156 goto err;
1157#endif /* defined(CONFIG_HAP_TRANSPARENT) */
1158 } /* "usesrc" */
1159
Tim Duesterhuse5ff1412021-01-02 22:31:53 +01001160 if (strcmp(args[*cur_arg], "interface") == 0) { /* specifically bind to this interface */
Frédéric Lécailledba97072017-03-17 15:33:50 +01001161#ifdef SO_BINDTODEVICE
1162 if (!*args[*cur_arg + 1]) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001163 ha_alert("'%s' : missing interface name.\n", args[0]);
Frédéric Lécailledba97072017-03-17 15:33:50 +01001164 goto err;
1165 }
1166 free(newsrv->conn_src.iface_name);
1167 newsrv->conn_src.iface_name = strdup(args[*cur_arg + 1]);
1168 newsrv->conn_src.iface_len = strlen(newsrv->conn_src.iface_name);
1169 global.last_checks |= LSTCHK_NETADM;
1170#else
Christopher Faulet767a84b2017-11-24 16:50:31 +01001171 ha_alert("'%s' : '%s' option not implemented.\n", args[0], args[*cur_arg]);
Frédéric Lécailledba97072017-03-17 15:33:50 +01001172 goto err;
1173#endif
1174 *cur_arg += 2;
1175 continue;
1176 }
1177 /* this keyword in not an option of "source" */
1178 break;
1179 } /* while */
1180
1181 return 0;
1182
1183 err:
1184 free(errmsg);
1185 return ERR_ALERT | ERR_FATAL;
1186}
1187
Frédéric Lécaillef9bc1d62017-03-10 15:50:49 +01001188/* Parse the "stick" server keyword */
1189static int srv_parse_stick(char **args, int *cur_arg,
1190 struct proxy *curproxy, struct server *newsrv, char **err)
1191{
1192 newsrv->flags &= ~SRV_F_NON_STICK;
1193 return 0;
1194}
1195
Frédéric Lécaille67e0e612017-03-14 15:21:31 +01001196/* Parse the "track" server keyword */
1197static int srv_parse_track(char **args, int *cur_arg,
1198 struct proxy *curproxy, struct server *newsrv, char **err)
1199{
1200 char *arg;
1201
1202 arg = args[*cur_arg + 1];
1203 if (!*arg) {
1204 memprintf(err, "'track' expects [<proxy>/]<server> as argument.\n");
1205 return ERR_ALERT | ERR_FATAL;
1206 }
1207
1208 free(newsrv->trackit);
1209 newsrv->trackit = strdup(arg);
1210
1211 return 0;
Alexander Liu2a54bb72019-05-22 19:44:48 +08001212}
1213
1214/* Parse the "socks4" server keyword */
1215static int srv_parse_socks4(char **args, int *cur_arg,
1216 struct proxy *curproxy, struct server *newsrv, char **err)
1217{
1218 char *errmsg;
1219 int port_low, port_high;
1220 struct sockaddr_storage *sk;
Alexander Liu2a54bb72019-05-22 19:44:48 +08001221
1222 errmsg = NULL;
1223
1224 if (!*args[*cur_arg + 1]) {
1225 memprintf(err, "'%s' expects <addr>:<port> as argument.\n", args[*cur_arg]);
1226 goto err;
1227 }
1228
1229 /* 'sk' is statically allocated (no need to be freed). */
Willy Tarreau65ec4e32020-09-16 19:17:08 +02001230 sk = str2sa_range(args[*cur_arg + 1], NULL, &port_low, &port_high, NULL, NULL,
1231 &errmsg, NULL, NULL,
1232 PA_O_RESOLVE | PA_O_PORT_OK | PA_O_PORT_MAND | PA_O_STREAM | PA_O_CONNECT);
Alexander Liu2a54bb72019-05-22 19:44:48 +08001233 if (!sk) {
1234 memprintf(err, "'%s %s' : %s\n", args[*cur_arg], args[*cur_arg + 1], errmsg);
1235 goto err;
1236 }
1237
Alexander Liu2a54bb72019-05-22 19:44:48 +08001238 newsrv->flags |= SRV_F_SOCKS4_PROXY;
1239 newsrv->socks4_addr = *sk;
1240
Alexander Liu2a54bb72019-05-22 19:44:48 +08001241 return 0;
1242
1243 err:
1244 free(errmsg);
1245 return ERR_ALERT | ERR_FATAL;
Frédéric Lécaille67e0e612017-03-14 15:21:31 +01001246}
1247
Frédéric Lécailledba97072017-03-17 15:33:50 +01001248
Willy Tarreau034c88c2017-01-23 23:36:45 +01001249/* parse the "tfo" server keyword */
1250static int srv_parse_tfo(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
1251{
1252 newsrv->flags |= SRV_F_FASTOPEN;
1253 return 0;
1254}
1255
Amaury Denoyelle587b71e2021-03-10 16:36:02 +01001256/* parse the "usesrc" server keyword */
1257static int srv_parse_usesrc(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
1258{
1259 memprintf(err, "'%s' only allowed after a '%s' statement.",
1260 "usesrc", "source");
1261 return ERR_ALERT | ERR_FATAL;
1262}
1263
1264/* parse the "weight" server keyword */
1265static int srv_parse_weight(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
1266{
1267 int w;
1268
1269 w = atol(args[*cur_arg + 1]);
1270 if (w < 0 || w > SRV_UWGHT_MAX) {
1271 memprintf(err, "weight of server %s is not within 0 and %d (%d).",
1272 newsrv->id, SRV_UWGHT_MAX, w);
1273 return ERR_ALERT | ERR_FATAL;
1274 }
1275 newsrv->uweight = newsrv->iweight = w;
1276
1277 return 0;
1278}
1279
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001280/* Shutdown all connections of a server. The caller must pass a termination
Willy Tarreaue7dff022015-04-03 01:14:29 +02001281 * code in <why>, which must be one of SF_ERR_* indicating the reason for the
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001282 * shutdown.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001283 *
1284 * Must be called with the server lock held.
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001285 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001286void srv_shutdown_streams(struct server *srv, int why)
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001287{
Willy Tarreau751153e2021-02-17 13:33:24 +01001288 struct stream *stream;
1289 struct mt_list *elt1, elt2;
Willy Tarreaud4e78d82021-03-04 10:47:54 +01001290 int thr;
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001291
Willy Tarreaud4e78d82021-03-04 10:47:54 +01001292 for (thr = 0; thr < global.nbthread; thr++)
1293 mt_list_for_each_entry_safe(stream, &srv->per_thr[thr].streams, by_srv, elt1, elt2)
1294 if (stream->srv_conn == srv)
1295 stream_shutdown(stream, why);
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001296}
1297
1298/* Shutdown all connections of all backup servers of a proxy. The caller must
Willy Tarreaue7dff022015-04-03 01:14:29 +02001299 * pass a termination code in <why>, which must be one of SF_ERR_* indicating
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001300 * the reason for the shutdown.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001301 *
1302 * Must be called with the server lock held.
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001303 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001304void srv_shutdown_backup_streams(struct proxy *px, int why)
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001305{
1306 struct server *srv;
1307
1308 for (srv = px->srv; srv != NULL; srv = srv->next)
1309 if (srv->flags & SRV_F_BACKUP)
Willy Tarreau87b09662015-04-03 00:22:06 +02001310 srv_shutdown_streams(srv, why);
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001311}
1312
Willy Tarreaubda92272014-05-20 21:55:30 +02001313/* Appends some information to a message string related to a server going UP or
1314 * DOWN. If both <forced> and <reason> are null and the server tracks another
1315 * one, a "via" information will be provided to know where the status came from.
Emeric Brun5a133512017-10-19 14:42:30 +02001316 * If <check> is non-null, an entire string describing the check result will be
1317 * appended after a comma and a space (eg: to report some information from the
1318 * check that changed the state). In the other case, the string will be built
1319 * using the check results stored into the struct server if present.
1320 * If <xferred> is non-negative, some information about requeued sessions are
Willy Tarreaubda92272014-05-20 21:55:30 +02001321 * provided.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001322 *
1323 * Must be called with the server lock held.
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001324 */
Willy Tarreau83061a82018-07-13 11:56:34 +02001325void srv_append_status(struct buffer *msg, struct server *s,
1326 struct check *check, int xferred, int forced)
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001327{
Emeric Brun5a133512017-10-19 14:42:30 +02001328 short status = s->op_st_chg.status;
1329 short code = s->op_st_chg.code;
1330 long duration = s->op_st_chg.duration;
1331 char *desc = s->op_st_chg.reason;
1332
1333 if (check) {
1334 status = check->status;
1335 code = check->code;
1336 duration = check->duration;
1337 desc = check->desc;
1338 }
1339
1340 if (status != -1) {
1341 chunk_appendf(msg, ", reason: %s", get_check_status_description(status));
1342
1343 if (status >= HCHK_STATUS_L57DATA)
1344 chunk_appendf(msg, ", code: %d", code);
1345
1346 if (desc && *desc) {
Willy Tarreau83061a82018-07-13 11:56:34 +02001347 struct buffer src;
Emeric Brun5a133512017-10-19 14:42:30 +02001348
1349 chunk_appendf(msg, ", info: \"");
1350
1351 chunk_initlen(&src, desc, 0, strlen(desc));
1352 chunk_asciiencode(msg, &src, '"');
1353
1354 chunk_appendf(msg, "\"");
1355 }
1356
1357 if (duration >= 0)
1358 chunk_appendf(msg, ", check duration: %ldms", duration);
1359 }
1360 else if (desc && *desc) {
1361 chunk_appendf(msg, ", %s", desc);
1362 }
1363 else if (!forced && s->track) {
Willy Tarreaubda92272014-05-20 21:55:30 +02001364 chunk_appendf(msg, " via %s/%s", s->track->proxy->id, s->track->id);
Emeric Brun5a133512017-10-19 14:42:30 +02001365 }
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001366
1367 if (xferred >= 0) {
Emeric Brun52a91d32017-08-31 14:41:55 +02001368 if (s->next_state == SRV_ST_STOPPED)
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001369 chunk_appendf(msg, ". %d active and %d backup servers left.%s"
1370 " %d sessions active, %d requeued, %d remaining in queue",
1371 s->proxy->srv_act, s->proxy->srv_bck,
1372 (s->proxy->srv_bck && !s->proxy->srv_act) ? " Running on backup." : "",
1373 s->cur_sess, xferred, s->nbpend);
1374 else
1375 chunk_appendf(msg, ". %d active and %d backup servers online.%s"
1376 " %d sessions requeued, %d total in queue",
1377 s->proxy->srv_act, s->proxy->srv_bck,
1378 (s->proxy->srv_bck && !s->proxy->srv_act) ? " Running on backup." : "",
1379 xferred, s->nbpend);
1380 }
1381}
1382
Emeric Brun5a133512017-10-19 14:42:30 +02001383/* Marks server <s> down, regardless of its checks' statuses. The server is
1384 * registered in a list to postpone the counting of the remaining servers on
1385 * the proxy and transfers queued streams whenever possible to other servers at
1386 * a sync point. Maintenance servers are ignored. It stores the <reason> if
1387 * non-null as the reason for going down or the available data from the check
1388 * struct to recompute this reason later.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001389 *
1390 * Must be called with the server lock held.
Willy Tarreaue7d1ef12014-05-20 22:25:12 +02001391 */
Emeric Brun5a133512017-10-19 14:42:30 +02001392void srv_set_stopped(struct server *s, const char *reason, struct check *check)
Willy Tarreaue7d1ef12014-05-20 22:25:12 +02001393{
1394 struct server *srv;
Willy Tarreaue7d1ef12014-05-20 22:25:12 +02001395
Emeric Brun64cc49c2017-10-03 14:46:45 +02001396 if ((s->cur_admin & SRV_ADMF_MAINT) || s->next_state == SRV_ST_STOPPED)
Willy Tarreaue7d1ef12014-05-20 22:25:12 +02001397 return;
1398
Emeric Brun52a91d32017-08-31 14:41:55 +02001399 s->next_state = SRV_ST_STOPPED;
Emeric Brun5a133512017-10-19 14:42:30 +02001400 *s->op_st_chg.reason = 0;
1401 s->op_st_chg.status = -1;
1402 if (reason) {
1403 strlcpy2(s->op_st_chg.reason, reason, sizeof(s->op_st_chg.reason));
1404 }
1405 else if (check) {
Willy Tarreau358847f2017-11-20 21:33:21 +01001406 strlcpy2(s->op_st_chg.reason, check->desc, sizeof(s->op_st_chg.reason));
Emeric Brun5a133512017-10-19 14:42:30 +02001407 s->op_st_chg.code = check->code;
1408 s->op_st_chg.status = check->status;
1409 s->op_st_chg.duration = check->duration;
1410 }
Willy Tarreaue7d1ef12014-05-20 22:25:12 +02001411
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001412 /* propagate changes */
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001413 srv_update_status(s);
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001414
Emeric Brun9f0b4582017-10-23 14:39:51 +02001415 for (srv = s->trackers; srv; srv = srv->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001416 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Emeric Brun5a133512017-10-19 14:42:30 +02001417 srv_set_stopped(srv, NULL, NULL);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001418 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02001419 }
Willy Tarreaue7d1ef12014-05-20 22:25:12 +02001420}
1421
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001422/* Marks server <s> up regardless of its checks' statuses and provided it isn't
Emeric Brun5a133512017-10-19 14:42:30 +02001423 * in maintenance. The server is registered in a list to postpone the counting
1424 * of the remaining servers on the proxy and tries to grab requests from the
1425 * proxy at a sync point. Maintenance servers are ignored. It stores the
1426 * <reason> if non-null as the reason for going down or the available data
1427 * from the check struct to recompute this reason later.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001428 *
1429 * Must be called with the server lock held.
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001430 */
Emeric Brun5a133512017-10-19 14:42:30 +02001431void srv_set_running(struct server *s, const char *reason, struct check *check)
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001432{
1433 struct server *srv;
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001434
Emeric Brun64cc49c2017-10-03 14:46:45 +02001435 if (s->cur_admin & SRV_ADMF_MAINT)
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001436 return;
1437
Emeric Brun52a91d32017-08-31 14:41:55 +02001438 if (s->next_state == SRV_ST_STARTING || s->next_state == SRV_ST_RUNNING)
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001439 return;
1440
Emeric Brun52a91d32017-08-31 14:41:55 +02001441 s->next_state = SRV_ST_STARTING;
Emeric Brun5a133512017-10-19 14:42:30 +02001442 *s->op_st_chg.reason = 0;
1443 s->op_st_chg.status = -1;
1444 if (reason) {
1445 strlcpy2(s->op_st_chg.reason, reason, sizeof(s->op_st_chg.reason));
1446 }
1447 else if (check) {
Willy Tarreau358847f2017-11-20 21:33:21 +01001448 strlcpy2(s->op_st_chg.reason, check->desc, sizeof(s->op_st_chg.reason));
Emeric Brun5a133512017-10-19 14:42:30 +02001449 s->op_st_chg.code = check->code;
1450 s->op_st_chg.status = check->status;
1451 s->op_st_chg.duration = check->duration;
1452 }
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001453
Emeric Brun64cc49c2017-10-03 14:46:45 +02001454 if (s->slowstart <= 0)
1455 s->next_state = SRV_ST_RUNNING;
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001456
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001457 /* propagate changes */
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001458 srv_update_status(s);
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001459
Emeric Brun9f0b4582017-10-23 14:39:51 +02001460 for (srv = s->trackers; srv; srv = srv->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001461 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Emeric Brun5a133512017-10-19 14:42:30 +02001462 srv_set_running(srv, NULL, NULL);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001463 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02001464 }
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001465}
1466
Willy Tarreau8eb77842014-05-21 13:54:57 +02001467/* Marks server <s> stopping regardless of its checks' statuses and provided it
Emeric Brun5a133512017-10-19 14:42:30 +02001468 * isn't in maintenance. The server is registered in a list to postpone the
1469 * counting of the remaining servers on the proxy and tries to grab requests
1470 * from the proxy. Maintenance servers are ignored. It stores the
1471 * <reason> if non-null as the reason for going down or the available data
1472 * from the check struct to recompute this reason later.
Willy Tarreau8eb77842014-05-21 13:54:57 +02001473 * up. Note that it makes use of the trash to build the log strings, so <reason>
1474 * must not be placed there.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001475 *
1476 * Must be called with the server lock held.
Willy Tarreau8eb77842014-05-21 13:54:57 +02001477 */
Emeric Brun5a133512017-10-19 14:42:30 +02001478void srv_set_stopping(struct server *s, const char *reason, struct check *check)
Willy Tarreau8eb77842014-05-21 13:54:57 +02001479{
1480 struct server *srv;
Willy Tarreau8eb77842014-05-21 13:54:57 +02001481
Emeric Brun64cc49c2017-10-03 14:46:45 +02001482 if (s->cur_admin & SRV_ADMF_MAINT)
Willy Tarreau8eb77842014-05-21 13:54:57 +02001483 return;
1484
Emeric Brun52a91d32017-08-31 14:41:55 +02001485 if (s->next_state == SRV_ST_STOPPING)
Willy Tarreau8eb77842014-05-21 13:54:57 +02001486 return;
1487
Emeric Brun52a91d32017-08-31 14:41:55 +02001488 s->next_state = SRV_ST_STOPPING;
Emeric Brun5a133512017-10-19 14:42:30 +02001489 *s->op_st_chg.reason = 0;
1490 s->op_st_chg.status = -1;
1491 if (reason) {
1492 strlcpy2(s->op_st_chg.reason, reason, sizeof(s->op_st_chg.reason));
1493 }
1494 else if (check) {
Willy Tarreau358847f2017-11-20 21:33:21 +01001495 strlcpy2(s->op_st_chg.reason, check->desc, sizeof(s->op_st_chg.reason));
Emeric Brun5a133512017-10-19 14:42:30 +02001496 s->op_st_chg.code = check->code;
1497 s->op_st_chg.status = check->status;
1498 s->op_st_chg.duration = check->duration;
1499 }
Willy Tarreau8eb77842014-05-21 13:54:57 +02001500
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001501 /* propagate changes */
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001502 srv_update_status(s);
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001503
Emeric Brun9f0b4582017-10-23 14:39:51 +02001504 for (srv = s->trackers; srv; srv = srv->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001505 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Emeric Brun5a133512017-10-19 14:42:30 +02001506 srv_set_stopping(srv, NULL, NULL);
Christopher Faulet8d01fd62018-01-24 21:49:41 +01001507 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02001508 }
Willy Tarreau8eb77842014-05-21 13:54:57 +02001509}
Willy Tarreaudbd5e782014-05-20 22:46:35 +02001510
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001511/* Enables admin flag <mode> (among SRV_ADMF_*) on server <s>. This is used to
1512 * enforce either maint mode or drain mode. It is not allowed to set more than
1513 * one flag at once. The equivalent "inherited" flag is propagated to all
1514 * tracking servers. Maintenance mode disables health checks (but not agent
1515 * checks). When either the flag is already set or no flag is passed, nothing
Willy Tarreau8b428482016-11-07 15:53:43 +01001516 * is done. If <cause> is non-null, it will be displayed at the end of the log
1517 * lines to justify the state change.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001518 *
1519 * Must be called with the server lock held.
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001520 */
Willy Tarreau8b428482016-11-07 15:53:43 +01001521void srv_set_admin_flag(struct server *s, enum srv_admin mode, const char *cause)
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001522{
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001523 struct server *srv;
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001524
1525 if (!mode)
1526 return;
1527
1528 /* stop going down as soon as we meet a server already in the same state */
Emeric Brun52a91d32017-08-31 14:41:55 +02001529 if (s->next_admin & mode)
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001530 return;
1531
Emeric Brun52a91d32017-08-31 14:41:55 +02001532 s->next_admin |= mode;
Emeric Brun64cc49c2017-10-03 14:46:45 +02001533 if (cause)
1534 strlcpy2(s->adm_st_chg_cause, cause, sizeof(s->adm_st_chg_cause));
1535
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001536 /* propagate changes */
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001537 srv_update_status(s);
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001538
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001539 /* stop going down if the equivalent flag was already present (forced or inherited) */
Emeric Brun52a91d32017-08-31 14:41:55 +02001540 if (((mode & SRV_ADMF_MAINT) && (s->next_admin & ~mode & SRV_ADMF_MAINT)) ||
1541 ((mode & SRV_ADMF_DRAIN) && (s->next_admin & ~mode & SRV_ADMF_DRAIN)))
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001542 return;
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001543
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001544 /* compute the inherited flag to propagate */
1545 if (mode & SRV_ADMF_MAINT)
1546 mode = SRV_ADMF_IMAINT;
1547 else if (mode & SRV_ADMF_DRAIN)
1548 mode = SRV_ADMF_IDRAIN;
1549
Emeric Brun9f0b4582017-10-23 14:39:51 +02001550 for (srv = s->trackers; srv; srv = srv->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001551 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Willy Tarreau8b428482016-11-07 15:53:43 +01001552 srv_set_admin_flag(srv, mode, cause);
Christopher Faulet8d01fd62018-01-24 21:49:41 +01001553 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02001554 }
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001555}
1556
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001557/* Disables admin flag <mode> (among SRV_ADMF_*) on server <s>. This is used to
1558 * stop enforcing either maint mode or drain mode. It is not allowed to set more
1559 * than one flag at once. The equivalent "inherited" flag is propagated to all
1560 * tracking servers. Leaving maintenance mode re-enables health checks. When
1561 * either the flag is already cleared or no flag is passed, nothing is done.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001562 *
1563 * Must be called with the server lock held.
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001564 */
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001565void srv_clr_admin_flag(struct server *s, enum srv_admin mode)
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001566{
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001567 struct server *srv;
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001568
1569 if (!mode)
1570 return;
1571
1572 /* stop going down as soon as we see the flag is not there anymore */
Emeric Brun52a91d32017-08-31 14:41:55 +02001573 if (!(s->next_admin & mode))
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001574 return;
1575
Emeric Brun52a91d32017-08-31 14:41:55 +02001576 s->next_admin &= ~mode;
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001577
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001578 /* propagate changes */
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001579 srv_update_status(s);
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001580
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001581 /* stop going down if the equivalent flag is still present (forced or inherited) */
Emeric Brun52a91d32017-08-31 14:41:55 +02001582 if (((mode & SRV_ADMF_MAINT) && (s->next_admin & SRV_ADMF_MAINT)) ||
1583 ((mode & SRV_ADMF_DRAIN) && (s->next_admin & SRV_ADMF_DRAIN)))
Willy Tarreaueeba36b2018-08-21 08:22:26 +02001584 return;
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001585
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001586 if (mode & SRV_ADMF_MAINT)
1587 mode = SRV_ADMF_IMAINT;
1588 else if (mode & SRV_ADMF_DRAIN)
1589 mode = SRV_ADMF_IDRAIN;
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001590
Emeric Brun9f0b4582017-10-23 14:39:51 +02001591 for (srv = s->trackers; srv; srv = srv->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001592 HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
Willy Tarreaubfc7b7a2014-05-22 16:14:34 +02001593 srv_clr_admin_flag(srv, mode);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001594 HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02001595 }
Willy Tarreaua0066dd2014-05-16 11:25:16 +02001596}
1597
Willy Tarreau757478e2016-11-03 19:22:19 +01001598/* principle: propagate maint and drain to tracking servers. This is useful
1599 * upon startup so that inherited states are correct.
1600 */
1601static void srv_propagate_admin_state(struct server *srv)
1602{
1603 struct server *srv2;
1604
1605 if (!srv->trackers)
1606 return;
1607
1608 for (srv2 = srv->trackers; srv2; srv2 = srv2->tracknext) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001609 HA_SPIN_LOCK(SERVER_LOCK, &srv2->lock);
Emeric Brun52a91d32017-08-31 14:41:55 +02001610 if (srv->next_admin & (SRV_ADMF_MAINT | SRV_ADMF_CMAINT))
Willy Tarreau8b428482016-11-07 15:53:43 +01001611 srv_set_admin_flag(srv2, SRV_ADMF_IMAINT, NULL);
Willy Tarreau757478e2016-11-03 19:22:19 +01001612
Emeric Brun52a91d32017-08-31 14:41:55 +02001613 if (srv->next_admin & SRV_ADMF_DRAIN)
Willy Tarreau8b428482016-11-07 15:53:43 +01001614 srv_set_admin_flag(srv2, SRV_ADMF_IDRAIN, NULL);
Christopher Faulet2a944ee2017-11-07 10:42:54 +01001615 HA_SPIN_UNLOCK(SERVER_LOCK, &srv2->lock);
Willy Tarreau757478e2016-11-03 19:22:19 +01001616 }
1617}
1618
1619/* Compute and propagate the admin states for all servers in proxy <px>.
1620 * Only servers *not* tracking another one are considered, because other
1621 * ones will be handled when the server they track is visited.
1622 */
1623void srv_compute_all_admin_states(struct proxy *px)
1624{
1625 struct server *srv;
1626
1627 for (srv = px->srv; srv; srv = srv->next) {
1628 if (srv->track)
1629 continue;
1630 srv_propagate_admin_state(srv);
1631 }
1632}
1633
Willy Tarreaudff55432012-10-10 17:51:05 +02001634/* Note: must not be declared <const> as its list will be overwritten.
1635 * Please take care of keeping this list alphabetically sorted, doing so helps
1636 * all code contributors.
1637 * Optional keywords are also declared with a NULL ->parse() function so that
1638 * the config parser can report an appropriate error when a known keyword was
1639 * not enabled.
Frédéric Lécailledfacd692017-04-16 17:14:14 +02001640 * Note: -1 as ->skip value means that the number of arguments are variable.
Willy Tarreaudff55432012-10-10 17:51:05 +02001641 */
1642static struct srv_kw_list srv_kws = { "ALL", { }, {
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001643 { "backup", srv_parse_backup, 0, 1, 1 }, /* Flag as backup server */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001644 { "cookie", srv_parse_cookie, 1, 1, 0 }, /* Assign a cookie to the server */
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001645 { "disabled", srv_parse_disabled, 0, 1, 1 }, /* Start the server in 'disabled' state */
1646 { "enabled", srv_parse_enabled, 0, 1, 1 }, /* Start the server in 'enabled' state */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001647 { "error-limit", srv_parse_error_limit, 1, 1, 0 }, /* Configure the consecutive count of check failures to consider a server on error */
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001648 { "id", srv_parse_id, 1, 0, 1 }, /* set id# of server */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001649 { "init-addr", srv_parse_init_addr, 1, 1, 0 }, /* */
1650 { "log-proto", srv_parse_log_proto, 1, 1, 0 }, /* Set the protocol for event messages, only relevant in a ring section */
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001651 { "maxconn", srv_parse_maxconn, 1, 1, 1 }, /* Set the max number of concurrent connection */
1652 { "maxqueue", srv_parse_maxqueue, 1, 1, 1 }, /* Set the max number of connection to put in queue */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001653 { "max-reuse", srv_parse_max_reuse, 1, 1, 0 }, /* Set the max number of requests on a connection, -1 means unlimited */
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001654 { "minconn", srv_parse_minconn, 1, 1, 1 }, /* Enable a dynamic maxconn limit */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001655 { "namespace", srv_parse_namespace, 1, 1, 0 }, /* Namespace the server socket belongs to (if supported) */
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001656 { "no-backup", srv_parse_no_backup, 0, 1, 1 }, /* Flag as non-backup server */
1657 { "no-send-proxy", srv_parse_no_send_proxy, 0, 1, 1 }, /* Disable use of PROXY V1 protocol */
1658 { "no-send-proxy-v2", srv_parse_no_send_proxy_v2, 0, 1, 1 }, /* Disable use of PROXY V2 protocol */
1659 { "no-tfo", srv_parse_no_tfo, 0, 1, 1 }, /* Disable use of TCP Fast Open */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001660 { "non-stick", srv_parse_non_stick, 0, 1, 0 }, /* Disable stick-table persistence */
1661 { "observe", srv_parse_observe, 1, 1, 0 }, /* Enables health adjusting based on observing communication with the server */
1662 { "on-error", srv_parse_on_error, 1, 1, 0 }, /* Configure the action on check failure */
1663 { "on-marked-down", srv_parse_on_marked_down, 1, 1, 0 }, /* Configure the action when a server is marked down */
1664 { "on-marked-up", srv_parse_on_marked_up, 1, 1, 0 }, /* Configure the action when a server is marked up */
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001665 { "pool-low-conn", srv_parse_pool_low_conn, 1, 1, 1 }, /* Set the min number of orphan idle connecbefore being allowed to pick from other threads */
1666 { "pool-max-conn", srv_parse_pool_max_conn, 1, 1, 1 }, /* Set the max number of orphan idle connections, -1 means unlimited */
1667 { "pool-purge-delay", srv_parse_pool_purge_delay, 1, 1, 1 }, /* Set the time before we destroy orphan idle connections, defaults to 1s */
Amaury Denoyelle30467232021-03-12 18:03:27 +01001668 { "proto", srv_parse_proto, 1, 1, 1 }, /* Set the proto to use for all outgoing connections */
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001669 { "proxy-v2-options", srv_parse_proxy_v2_options, 1, 1, 1 }, /* options for send-proxy-v2 */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001670 { "redir", srv_parse_redir, 1, 1, 0 }, /* Enable redirection mode */
Ilya Shipitsinba13f162021-03-19 22:21:44 +05001671 { "resolve-net", srv_parse_resolve_net, 1, 1, 0 }, /* Set the preferred network range for name resolution */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001672 { "resolve-opts", srv_parse_resolve_opts, 1, 1, 0 }, /* Set options for name resolution */
Ilya Shipitsinba13f162021-03-19 22:21:44 +05001673 { "resolve-prefer", srv_parse_resolve_prefer, 1, 1, 0 }, /* Set the preferred family for name resolution */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001674 { "resolvers", srv_parse_resolvers, 1, 1, 0 }, /* Configure the resolver to use for name resolution */
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001675 { "send-proxy", srv_parse_send_proxy, 0, 1, 1 }, /* Enforce use of PROXY V1 protocol */
1676 { "send-proxy-v2", srv_parse_send_proxy_v2, 0, 1, 1 }, /* Enforce use of PROXY V2 protocol */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001677 { "slowstart", srv_parse_slowstart, 1, 1, 0 }, /* Set the warm-up timer for a previously failed server */
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001678 { "source", srv_parse_source, -1, 1, 1 }, /* Set the source address to be used to connect to the server */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001679 { "stick", srv_parse_stick, 0, 1, 0 }, /* Enable stick-table persistence */
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001680 { "tfo", srv_parse_tfo, 0, 1, 1 }, /* enable TCP Fast Open of server */
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01001681 { "track", srv_parse_track, 1, 1, 0 }, /* Set the current state of the server, tracking another one */
1682 { "socks4", srv_parse_socks4, 1, 1, 0 }, /* Set the socks4 proxy of the server*/
Amaury Denoyellefc465a52021-03-09 17:36:23 +01001683 { "usesrc", srv_parse_usesrc, 0, 1, 1 }, /* safe-guard against usesrc without preceding <source> keyword */
1684 { "weight", srv_parse_weight, 1, 1, 1 }, /* Set the load-balancing weight */
Willy Tarreaudff55432012-10-10 17:51:05 +02001685 { NULL, NULL, 0 },
1686}};
1687
Willy Tarreau0108d902018-11-25 19:14:37 +01001688INITCALL1(STG_REGISTER, srv_register_keywords, &srv_kws);
Willy Tarreaudff55432012-10-10 17:51:05 +02001689
Willy Tarreau004e0452013-11-21 11:22:01 +01001690/* Recomputes the server's eweight based on its state, uweight, the current time,
Ilya Shipitsinc02a23f2020-05-06 00:53:22 +05001691 * and the proxy's algorithm. To be used after updating sv->uweight. The warmup
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001692 * state is automatically disabled if the time is elapsed. If <must_update> is
1693 * not zero, the update will be propagated immediately.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001694 *
1695 * Must be called with the server lock held.
Willy Tarreau004e0452013-11-21 11:22:01 +01001696 */
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001697void server_recalc_eweight(struct server *sv, int must_update)
Willy Tarreau004e0452013-11-21 11:22:01 +01001698{
1699 struct proxy *px = sv->proxy;
1700 unsigned w;
1701
1702 if (now.tv_sec < sv->last_change || now.tv_sec >= sv->last_change + sv->slowstart) {
1703 /* go to full throttle if the slowstart interval is reached */
Emeric Brun52a91d32017-08-31 14:41:55 +02001704 if (sv->next_state == SRV_ST_STARTING)
1705 sv->next_state = SRV_ST_RUNNING;
Willy Tarreau004e0452013-11-21 11:22:01 +01001706 }
1707
1708 /* We must take care of not pushing the server to full throttle during slow starts.
1709 * It must also start immediately, at least at the minimal step when leaving maintenance.
1710 */
Emeric Brun52a91d32017-08-31 14:41:55 +02001711 if ((sv->next_state == SRV_ST_STARTING) && (px->lbprm.algo & BE_LB_PROP_DYN))
Willy Tarreau004e0452013-11-21 11:22:01 +01001712 w = (px->lbprm.wdiv * (now.tv_sec - sv->last_change) + sv->slowstart) / sv->slowstart;
1713 else
1714 w = px->lbprm.wdiv;
1715
Emeric Brun52a91d32017-08-31 14:41:55 +02001716 sv->next_eweight = (sv->uweight * w + px->lbprm.wmult - 1) / px->lbprm.wmult;
Willy Tarreau004e0452013-11-21 11:22:01 +01001717
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001718 /* propagate changes only if needed (i.e. not recursively) */
Willy Tarreau49725a02018-08-21 19:54:09 +02001719 if (must_update)
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001720 srv_update_status(sv);
Willy Tarreau004e0452013-11-21 11:22:01 +01001721}
1722
Willy Tarreaubaaee002006-06-26 02:48:02 +02001723/*
Simon Horman7d09b9a2013-02-12 10:45:51 +09001724 * Parses weight_str and configures sv accordingly.
1725 * Returns NULL on success, error message string otherwise.
Willy Tarreau46b7f532018-08-21 11:54:26 +02001726 *
1727 * Must be called with the server lock held.
Simon Horman7d09b9a2013-02-12 10:45:51 +09001728 */
1729const char *server_parse_weight_change_request(struct server *sv,
1730 const char *weight_str)
1731{
1732 struct proxy *px;
Simon Hormanb796afa2013-02-12 10:45:53 +09001733 long int w;
1734 char *end;
Simon Horman7d09b9a2013-02-12 10:45:51 +09001735
1736 px = sv->proxy;
1737
1738 /* if the weight is terminated with '%', it is set relative to
1739 * the initial weight, otherwise it is absolute.
1740 */
1741 if (!*weight_str)
1742 return "Require <weight> or <weight%>.\n";
1743
Simon Hormanb796afa2013-02-12 10:45:53 +09001744 w = strtol(weight_str, &end, 10);
1745 if (end == weight_str)
1746 return "Empty weight string empty or preceded by garbage";
1747 else if (end[0] == '%' && end[1] == '\0') {
Simon Horman58b5d292013-02-12 10:45:52 +09001748 if (w < 0)
Simon Horman7d09b9a2013-02-12 10:45:51 +09001749 return "Relative weight must be positive.\n";
Simon Horman58b5d292013-02-12 10:45:52 +09001750 /* Avoid integer overflow */
1751 if (w > 25600)
1752 w = 25600;
Simon Horman7d09b9a2013-02-12 10:45:51 +09001753 w = sv->iweight * w / 100;
Simon Horman58b5d292013-02-12 10:45:52 +09001754 if (w > 256)
1755 w = 256;
Simon Horman7d09b9a2013-02-12 10:45:51 +09001756 }
1757 else if (w < 0 || w > 256)
1758 return "Absolute weight can only be between 0 and 256 inclusive.\n";
Simon Hormanb796afa2013-02-12 10:45:53 +09001759 else if (end[0] != '\0')
1760 return "Trailing garbage in weight string";
Simon Horman7d09b9a2013-02-12 10:45:51 +09001761
1762 if (w && w != sv->iweight && !(px->lbprm.algo & BE_LB_PROP_DYN))
1763 return "Backend is using a static LB algorithm and only accepts weights '0%' and '100%'.\n";
1764
1765 sv->uweight = w;
Willy Tarreau3ff577e2018-08-02 11:48:52 +02001766 server_recalc_eweight(sv, 1);
Simon Horman7d09b9a2013-02-12 10:45:51 +09001767
1768 return NULL;
1769}
1770
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001771/*
Thierry Fournier09a91782016-02-24 08:25:39 +01001772 * Parses <addr_str> and configures <sv> accordingly. <from> precise
1773 * the source of the change in the associated message log.
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001774 * Returns:
1775 * - error string on error
1776 * - NULL on success
Willy Tarreau46b7f532018-08-21 11:54:26 +02001777 *
1778 * Must be called with the server lock held.
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001779 */
1780const char *server_parse_addr_change_request(struct server *sv,
Thierry Fournier09a91782016-02-24 08:25:39 +01001781 const char *addr_str, const char *updater)
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001782{
1783 unsigned char ip[INET6_ADDRSTRLEN];
1784
1785 if (inet_pton(AF_INET6, addr_str, ip)) {
Christopher Faulet69beaa92021-02-16 12:07:47 +01001786 srv_update_addr(sv, ip, AF_INET6, updater);
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001787 return NULL;
1788 }
1789 if (inet_pton(AF_INET, addr_str, ip)) {
Christopher Faulet69beaa92021-02-16 12:07:47 +01001790 srv_update_addr(sv, ip, AF_INET, updater);
Baptiste Assmann3d8f8312015-04-13 22:54:33 +02001791 return NULL;
1792 }
1793
1794 return "Could not understand IP address format.\n";
1795}
1796
Willy Tarreau46b7f532018-08-21 11:54:26 +02001797/*
1798 * Must be called with the server lock held.
1799 */
Nenad Merdanovic174dd372016-04-24 23:10:06 +02001800const char *server_parse_maxconn_change_request(struct server *sv,
1801 const char *maxconn_str)
1802{
1803 long int v;
1804 char *end;
1805
1806 if (!*maxconn_str)
1807 return "Require <maxconn>.\n";
1808
1809 v = strtol(maxconn_str, &end, 10);
1810 if (end == maxconn_str)
1811 return "maxconn string empty or preceded by garbage";
1812 else if (end[0] != '\0')
1813 return "Trailing garbage in maxconn string";
1814
Amaury Denoyelle3cf81442021-05-17 10:47:18 +02001815 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Nenad Merdanovic174dd372016-04-24 23:10:06 +02001816 if (sv->maxconn == sv->minconn) { // static maxconn
1817 sv->maxconn = sv->minconn = v;
1818 } else { // dynamic maxconn
1819 sv->maxconn = v;
1820 }
Amaury Denoyelle3cf81442021-05-17 10:47:18 +02001821 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Nenad Merdanovic174dd372016-04-24 23:10:06 +02001822
1823 if (may_dequeue_tasks(sv, sv->proxy))
1824 process_srv_queue(sv);
1825
1826 return NULL;
1827}
1828
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001829#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001830static struct sample_expr *srv_sni_sample_parse_expr(struct server *srv, struct proxy *px,
1831 const char *file, int linenum, char **err)
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001832{
1833 int idx;
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001834 const char *args[] = {
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001835 srv->sni_expr,
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001836 NULL,
1837 };
1838
1839 idx = 0;
Olivier Houchard7d8e6882017-04-20 18:21:17 +02001840 px->conf.args.ctx = ARGC_SRV;
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001841
Willy Tarreaue3b57bf2020-02-14 16:50:14 +01001842 return sample_parse_expr((char **)args, &idx, file, linenum, err, &px->conf.args, NULL);
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001843}
1844
1845static int server_parse_sni_expr(struct server *newsrv, struct proxy *px, char **err)
1846{
1847 struct sample_expr *expr;
1848
1849 expr = srv_sni_sample_parse_expr(newsrv, px, px->conf.file, px->conf.line, err);
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001850 if (!expr) {
1851 memprintf(err, "error detected while parsing sni expression : %s", *err);
1852 return ERR_ALERT | ERR_FATAL;
1853 }
1854
1855 if (!(expr->fetch->val & SMP_VAL_BE_SRV_CON)) {
1856 memprintf(err, "error detected while parsing sni expression : "
1857 " fetch method '%s' extracts information from '%s', "
1858 "none of which is available here.\n",
Frédéric Lécaille759ea982017-03-30 17:32:36 +02001859 newsrv->sni_expr, sample_src_names(expr->fetch->use));
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001860 return ERR_ALERT | ERR_FATAL;
1861 }
1862
1863 px->http_needed |= !!(expr->fetch->use & SMP_USE_HTTP_ANY);
1864 release_sample_expr(newsrv->ssl_ctx.sni);
1865 newsrv->ssl_ctx.sni = expr;
1866
1867 return 0;
1868}
1869#endif
1870
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001871static 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 +01001872{
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001873 char *msg = "error encountered while processing ";
1874 char *quote = "'";
1875 char *token = args[cur_arg];
1876
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001877 if (err && *err) {
1878 indent_msg(err, 2);
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001879 msg = *err;
1880 quote = "";
1881 token = "";
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001882 }
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001883
1884 if (err_code & ERR_WARN && !(err_code & ERR_ALERT))
1885 ha_warning("parsing [%s:%d] : '%s %s' : %s%s%s%s.\n",
1886 file, linenum, args[0], args[1],
1887 msg, quote, token, quote);
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001888 else
Gaetan Rivet10c4b4a2020-02-11 11:42:38 +01001889 ha_alert("parsing [%s:%d] : '%s %s' : %s%s%s%s.\n",
1890 file, linenum, args[0], args[1],
1891 msg, quote, token, quote);
Frédéric Lécaille9a146de2017-03-20 14:54:41 +01001892}
1893
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001894static void srv_conn_src_sport_range_cpy(struct server *srv,
1895 struct server *src)
1896{
1897 int range_sz;
1898
1899 range_sz = src->conn_src.sport_range->size;
1900 if (range_sz > 0) {
1901 srv->conn_src.sport_range = port_range_alloc_range(range_sz);
1902 if (srv->conn_src.sport_range != NULL) {
1903 int i;
1904
1905 for (i = 0; i < range_sz; i++) {
1906 srv->conn_src.sport_range->ports[i] =
1907 src->conn_src.sport_range->ports[i];
1908 }
1909 }
1910 }
1911}
1912
1913/*
1914 * Copy <src> server connection source settings to <srv> server everything needed.
1915 */
1916static void srv_conn_src_cpy(struct server *srv, struct server *src)
1917{
1918 srv->conn_src.opts = src->conn_src.opts;
1919 srv->conn_src.source_addr = src->conn_src.source_addr;
1920
1921 /* Source port range copy. */
1922 if (src->conn_src.sport_range != NULL)
1923 srv_conn_src_sport_range_cpy(srv, src);
1924
1925#ifdef CONFIG_HAP_TRANSPARENT
1926 if (src->conn_src.bind_hdr_name != NULL) {
1927 srv->conn_src.bind_hdr_name = strdup(src->conn_src.bind_hdr_name);
1928 srv->conn_src.bind_hdr_len = strlen(src->conn_src.bind_hdr_name);
1929 }
1930 srv->conn_src.bind_hdr_occ = src->conn_src.bind_hdr_occ;
1931 srv->conn_src.tproxy_addr = src->conn_src.tproxy_addr;
1932#endif
1933 if (src->conn_src.iface_name != NULL)
1934 srv->conn_src.iface_name = strdup(src->conn_src.iface_name);
1935}
1936
1937/*
1938 * Copy <src> server SSL settings to <srv> server allocating
1939 * everything needed.
1940 */
1941#if defined(USE_OPENSSL)
1942static void srv_ssl_settings_cpy(struct server *srv, struct server *src)
1943{
1944 if (src->ssl_ctx.ca_file != NULL)
1945 srv->ssl_ctx.ca_file = strdup(src->ssl_ctx.ca_file);
1946 if (src->ssl_ctx.crl_file != NULL)
1947 srv->ssl_ctx.crl_file = strdup(src->ssl_ctx.crl_file);
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001948
1949 srv->ssl_ctx.verify = src->ssl_ctx.verify;
1950
1951 if (src->ssl_ctx.verify_host != NULL)
1952 srv->ssl_ctx.verify_host = strdup(src->ssl_ctx.verify_host);
1953 if (src->ssl_ctx.ciphers != NULL)
1954 srv->ssl_ctx.ciphers = strdup(src->ssl_ctx.ciphers);
Jerome Magnin2e8d52f2020-04-22 11:40:18 +02001955 if (src->ssl_ctx.options)
1956 srv->ssl_ctx.options = src->ssl_ctx.options;
1957 if (src->ssl_ctx.methods.flags)
1958 srv->ssl_ctx.methods.flags = src->ssl_ctx.methods.flags;
1959 if (src->ssl_ctx.methods.min)
1960 srv->ssl_ctx.methods.min = src->ssl_ctx.methods.min;
1961 if (src->ssl_ctx.methods.max)
1962 srv->ssl_ctx.methods.max = src->ssl_ctx.methods.max;
1963
Ilya Shipitsin2aa4b3a2021-01-07 11:55:45 +05001964#ifdef HAVE_SSL_CTX_SET_CIPHERSUITES
Dirkjan Bussink415150f2018-09-14 11:14:21 +02001965 if (src->ssl_ctx.ciphersuites != NULL)
1966 srv->ssl_ctx.ciphersuites = strdup(src->ssl_ctx.ciphersuites);
1967#endif
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001968 if (src->sni_expr != NULL)
1969 srv->sni_expr = strdup(src->sni_expr);
Olivier Houchardc7566002018-11-20 23:33:50 +01001970
1971#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
1972 if (src->ssl_ctx.alpn_str) {
1973 srv->ssl_ctx.alpn_str = malloc(src->ssl_ctx.alpn_len);
1974 if (srv->ssl_ctx.alpn_str) {
1975 memcpy(srv->ssl_ctx.alpn_str, src->ssl_ctx.alpn_str,
1976 src->ssl_ctx.alpn_len);
1977 srv->ssl_ctx.alpn_len = src->ssl_ctx.alpn_len;
1978 }
1979 }
1980#endif
1981#ifdef OPENSSL_NPN_NEGOTIATED
1982 if (src->ssl_ctx.npn_str) {
1983 srv->ssl_ctx.npn_str = malloc(src->ssl_ctx.npn_len);
1984 if (srv->ssl_ctx.npn_str) {
1985 memcpy(srv->ssl_ctx.npn_str, src->ssl_ctx.npn_str,
1986 src->ssl_ctx.npn_len);
1987 srv->ssl_ctx.npn_len = src->ssl_ctx.npn_len;
1988 }
1989 }
1990#endif
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02001991}
1992#endif
1993
1994/*
Baptiste Assmann201c07f2017-05-22 15:17:15 +02001995 * Prepare <srv> for hostname resolution.
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001996 * May be safely called with a default server as <src> argument (without hostname).
Frédéric Lécailleb418c122017-04-26 11:24:02 +02001997 * Returns -1 in case of any allocation failure, 0 if not.
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02001998 */
Christopher Faulet69beaa92021-02-16 12:07:47 +01001999int srv_prepare_for_resolution(struct server *srv, const char *hostname)
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002000{
Christopher Faulet67957bd2017-09-27 11:00:59 +02002001 char *hostname_dn;
2002 int hostname_len, hostname_dn_len;
2003
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002004 if (!hostname)
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002005 return 0;
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002006
Christopher Faulet67957bd2017-09-27 11:00:59 +02002007 hostname_len = strlen(hostname);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002008 hostname_dn = trash.area;
Emeric Brund30e9a12020-12-23 18:49:16 +01002009 hostname_dn_len = resolv_str_to_dn_label(hostname, hostname_len + 1,
2010 hostname_dn, trash.size);
Christopher Faulet67957bd2017-09-27 11:00:59 +02002011 if (hostname_dn_len == -1)
2012 goto err;
Baptiste Assmann81ed1a02017-05-03 10:11:44 +02002013
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002014
Christopher Faulet67957bd2017-09-27 11:00:59 +02002015 free(srv->hostname);
2016 free(srv->hostname_dn);
2017 srv->hostname = strdup(hostname);
2018 srv->hostname_dn = strdup(hostname_dn);
2019 srv->hostname_dn_len = hostname_dn_len;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02002020 if (!srv->hostname || !srv->hostname_dn)
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002021 goto err;
2022
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002023 return 0;
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002024
2025 err:
Willy Tarreau61cfdf42021-02-20 10:46:51 +01002026 ha_free(&srv->hostname);
2027 ha_free(&srv->hostname_dn);
Frédéric Lécailleb418c122017-04-26 11:24:02 +02002028 return -1;
2029}
2030
Baptiste Assmann201c07f2017-05-22 15:17:15 +02002031/*
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002032 * Copy <src> server settings to <srv> server allocating
2033 * everything needed.
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002034 * This function is not supposed to be called at any time, but only
2035 * during server settings parsing or during server allocations from
2036 * a server template, and just after having calloc()'ed a new server.
2037 * So, <src> may only be a default server (when parsing server settings)
2038 * or a server template (during server allocations from a server template).
2039 * <srv_tmpl> distinguishes these two cases (must be 1 if <srv> is a template,
2040 * 0 if not).
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002041 */
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002042static void srv_settings_cpy(struct server *srv, struct server *src, int srv_tmpl)
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002043{
2044 /* Connection source settings copy */
2045 srv_conn_src_cpy(srv, src);
2046
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002047 if (srv_tmpl) {
2048 srv->addr = src->addr;
2049 srv->svc_port = src->svc_port;
2050 }
2051
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002052 srv->pp_opts = src->pp_opts;
2053 if (src->rdr_pfx != NULL) {
2054 srv->rdr_pfx = strdup(src->rdr_pfx);
2055 srv->rdr_len = src->rdr_len;
2056 }
2057 if (src->cookie != NULL) {
2058 srv->cookie = strdup(src->cookie);
2059 srv->cklen = src->cklen;
2060 }
2061 srv->use_ssl = src->use_ssl;
Willy Tarreau24441082019-12-11 15:43:45 +01002062 srv->check.addr = src->check.addr;
2063 srv->agent.addr = src->agent.addr;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002064 srv->check.use_ssl = src->check.use_ssl;
2065 srv->check.port = src->check.port;
Olivier Houchard21944012018-12-21 19:42:01 +01002066 srv->check.sni = src->check.sni;
Olivier Houchard92150142018-12-21 19:47:01 +01002067 srv->check.alpn_str = src->check.alpn_str;
Ilya Shipitsin0c50b1e2019-04-30 21:21:28 +05002068 srv->check.alpn_len = src->check.alpn_len;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002069 /* Note: 'flags' field has potentially been already initialized. */
2070 srv->flags |= src->flags;
2071 srv->do_check = src->do_check;
2072 srv->do_agent = src->do_agent;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002073 srv->check.inter = src->check.inter;
2074 srv->check.fastinter = src->check.fastinter;
2075 srv->check.downinter = src->check.downinter;
2076 srv->agent.use_ssl = src->agent.use_ssl;
2077 srv->agent.port = src->agent.port;
Christopher Faulet0ae3d1d2020-04-06 17:54:24 +02002078
2079 if (src->agent.tcpcheck_rules) {
2080 srv->agent.tcpcheck_rules = calloc(1, sizeof(*srv->agent.tcpcheck_rules));
2081 if (srv->agent.tcpcheck_rules) {
2082 srv->agent.tcpcheck_rules->flags = src->agent.tcpcheck_rules->flags;
2083 srv->agent.tcpcheck_rules->list = src->agent.tcpcheck_rules->list;
2084 LIST_INIT(&srv->agent.tcpcheck_rules->preset_vars);
2085 dup_tcpcheck_vars(&srv->agent.tcpcheck_rules->preset_vars,
2086 &src->agent.tcpcheck_rules->preset_vars);
2087 }
2088 }
2089
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002090 srv->agent.inter = src->agent.inter;
2091 srv->agent.fastinter = src->agent.fastinter;
2092 srv->agent.downinter = src->agent.downinter;
2093 srv->maxqueue = src->maxqueue;
2094 srv->minconn = src->minconn;
2095 srv->maxconn = src->maxconn;
2096 srv->slowstart = src->slowstart;
2097 srv->observe = src->observe;
2098 srv->onerror = src->onerror;
2099 srv->onmarkeddown = src->onmarkeddown;
2100 srv->onmarkedup = src->onmarkedup;
2101 if (src->trackit != NULL)
2102 srv->trackit = strdup(src->trackit);
2103 srv->consecutive_errors_limit = src->consecutive_errors_limit;
2104 srv->uweight = srv->iweight = src->iweight;
2105
2106 srv->check.send_proxy = src->check.send_proxy;
2107 /* health: up, but will fall down at first failure */
2108 srv->check.rise = srv->check.health = src->check.rise;
2109 srv->check.fall = src->check.fall;
2110
2111 /* Here we check if 'disabled' is the default server state */
Emeric Brun52a91d32017-08-31 14:41:55 +02002112 if (src->next_admin & (SRV_ADMF_CMAINT | SRV_ADMF_FMAINT)) {
2113 srv->next_admin |= SRV_ADMF_CMAINT | SRV_ADMF_FMAINT;
2114 srv->next_state = SRV_ST_STOPPED;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002115 srv->check.state |= CHK_ST_PAUSED;
2116 srv->check.health = 0;
2117 }
2118
2119 /* health: up but will fall down at first failure */
2120 srv->agent.rise = srv->agent.health = src->agent.rise;
2121 srv->agent.fall = src->agent.fall;
2122
2123 if (src->resolvers_id != NULL)
2124 srv->resolvers_id = strdup(src->resolvers_id);
Emeric Brun21fbeed2020-12-23 18:01:04 +01002125 srv->resolv_opts.family_prio = src->resolv_opts.family_prio;
2126 srv->resolv_opts.accept_duplicate_ip = src->resolv_opts.accept_duplicate_ip;
2127 srv->resolv_opts.ignore_weight = src->resolv_opts.ignore_weight;
2128 if (srv->resolv_opts.family_prio == AF_UNSPEC)
2129 srv->resolv_opts.family_prio = AF_INET6;
2130 memcpy(srv->resolv_opts.pref_net,
2131 src->resolv_opts.pref_net,
2132 sizeof srv->resolv_opts.pref_net);
2133 srv->resolv_opts.pref_net_nb = src->resolv_opts.pref_net_nb;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002134
2135 srv->init_addr_methods = src->init_addr_methods;
2136 srv->init_addr = src->init_addr;
2137#if defined(USE_OPENSSL)
2138 srv_ssl_settings_cpy(srv, src);
2139#endif
2140#ifdef TCP_USER_TIMEOUT
2141 srv->tcp_ut = src->tcp_ut;
2142#endif
Christopher Faulet8ed0a3e2018-04-10 14:45:45 +02002143 srv->mux_proto = src->mux_proto;
Olivier Houchardb7b3faa2018-12-14 18:15:36 +01002144 srv->pool_purge_delay = src->pool_purge_delay;
Willy Tarreau2f3f4d32020-07-01 07:43:51 +02002145 srv->low_idle_conns = src->low_idle_conns;
Olivier Houchard006e3102018-12-10 18:30:32 +01002146 srv->max_idle_conns = src->max_idle_conns;
Willy Tarreau9c538e02019-01-23 10:21:49 +01002147 srv->max_reuse = src->max_reuse;
Christopher Faulet8ed0a3e2018-04-10 14:45:45 +02002148
Olivier Houchard8da5f982017-08-04 18:35:36 +02002149 if (srv_tmpl)
2150 srv->srvrq = src->srvrq;
Alexander Liu2a54bb72019-05-22 19:44:48 +08002151
2152 srv->check.via_socks4 = src->check.via_socks4;
2153 srv->socks4_addr = src->socks4_addr;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002154}
2155
Willy Tarreau198e92a2021-03-05 10:23:32 +01002156/* allocate a server and attach it to the global servers_list. Returns
2157 * the server on success, otherwise NULL.
2158 */
William Lallemand313bfd12018-10-26 14:47:32 +02002159struct server *new_server(struct proxy *proxy)
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002160{
2161 struct server *srv;
2162
2163 srv = calloc(1, sizeof *srv);
2164 if (!srv)
2165 return NULL;
2166
2167 srv->obj_type = OBJ_TYPE_SERVER;
2168 srv->proxy = proxy;
Patrick Hemmer0355dab2018-05-11 12:52:31 -04002169 srv->pendconns = EB_ROOT;
Willy Tarreau2b718102021-04-21 07:32:39 +02002170 LIST_APPEND(&servers_list, &srv->global_list);
Emeric Brun0c4a8a32021-06-11 10:48:45 +02002171 LIST_INIT(&srv->srv_rec_item);
Emeric Brunf9ca5d82021-06-11 10:08:05 +02002172 LIST_INIT(&srv->ip_rec_item);
Christopher Faulet40a007c2017-07-03 15:41:01 +02002173
Emeric Brun52a91d32017-08-31 14:41:55 +02002174 srv->next_state = SRV_ST_RUNNING; /* early server setup */
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002175 srv->last_change = now.tv_sec;
2176
Christopher Faulet38290462020-04-21 11:46:40 +02002177 srv->check.obj_type = OBJ_TYPE_CHECK;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002178 srv->check.status = HCHK_STATUS_INI;
2179 srv->check.server = srv;
Olivier Houchardc98aa1f2019-01-11 18:17:17 +01002180 srv->check.proxy = proxy;
Christopher Faulet5d503fc2020-03-30 20:34:34 +02002181 srv->check.tcpcheck_rules = &proxy->tcpcheck_rules;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002182
Christopher Faulet38290462020-04-21 11:46:40 +02002183 srv->agent.obj_type = OBJ_TYPE_CHECK;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002184 srv->agent.status = HCHK_STATUS_INI;
2185 srv->agent.server = srv;
Willy Tarreau1ba32032019-01-21 07:48:26 +01002186 srv->agent.proxy = proxy;
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002187 srv->xprt = srv->check.xprt = srv->agent.xprt = xprt_get(XPRT_RAW);
Frédéric Lécaillef46c10c2020-11-23 14:29:28 +01002188#if defined(USE_QUIC)
2189 srv->cids = EB_ROOT_UNIQUE;
2190#endif
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002191
Amaury Denoyelle7f8f6cb2020-11-10 14:24:31 +01002192 srv->extra_counters = NULL;
William Lallemand3ce6eed2021-02-08 10:43:44 +01002193#ifdef USE_OPENSSL
2194 HA_RWLOCK_INIT(&srv->ssl_ctx.lock);
2195#endif
Amaury Denoyelle7f8f6cb2020-11-10 14:24:31 +01002196
Willy Tarreau975b1552019-06-06 16:25:55 +02002197 /* please don't put default server settings here, they are set in
Willy Tarreau144289b2021-02-12 08:19:01 +01002198 * proxy_preset_defaults().
Willy Tarreau975b1552019-06-06 16:25:55 +02002199 */
Frédéric Lécaille58b207c2017-03-30 14:18:30 +02002200 return srv;
2201}
Frédéric Lécaille759ea982017-03-30 17:32:36 +02002202
Amaury Denoyelle828adf02021-03-16 17:20:15 +01002203/* Deallocate a server <srv> and its member. <srv> must be allocated.
2204 */
2205void free_server(struct server *srv)
2206{
2207 task_destroy(srv->warmup);
2208
2209 free(srv->id);
2210 free(srv->cookie);
2211 free(srv->hostname);
2212 free(srv->hostname_dn);
2213 free((char*)srv->conf.file);
2214 free(srv->per_thr);
2215 free(srv->curr_idle_thr);
2216 free(srv->resolvers_id);
2217 free(srv->addr_node.key);
Amaury Denoyellefb247942021-04-20 16:48:22 +02002218 free(srv->lb_nodes);
Amaury Denoyelle828adf02021-03-16 17:20:15 +01002219
2220 if (srv->use_ssl == 1 || srv->check.use_ssl == 1 || (srv->proxy->options & PR_O_TCPCHK_SSL)) {
2221 if (xprt_get(XPRT_SSL) && xprt_get(XPRT_SSL)->destroy_srv)
2222 xprt_get(XPRT_SSL)->destroy_srv(srv);
2223 }
2224 HA_SPIN_DESTROY(&srv->lock);
2225
Willy Tarreau2b718102021-04-21 07:32:39 +02002226 LIST_DELETE(&srv->global_list);
Amaury Denoyelle828adf02021-03-16 17:20:15 +01002227
2228 EXTRA_COUNTERS_FREE(srv->extra_counters);
2229
2230 free(srv);
2231 srv = NULL;
2232}
2233
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01002234/*
2235 * Parse as much as possible such a range string argument: low[-high]
2236 * Set <nb_low> and <nb_high> values so that they may be reused by this loop
2237 * for(int i = nb_low; i <= nb_high; i++)... with nb_low >= 1.
2238 * Fails if 'low' < 0 or 'high' is present and not higher than 'low'.
2239 * Returns 0 if succeeded, -1 if not.
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002240 */
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002241static int _srv_parse_tmpl_range(struct server *srv, const char *arg,
2242 int *nb_low, int *nb_high)
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002243{
2244 char *nb_high_arg;
2245
2246 *nb_high = 0;
2247 chunk_printf(&trash, "%s", arg);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002248 *nb_low = atoi(trash.area);
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002249
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002250 if ((nb_high_arg = strchr(trash.area, '-'))) {
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002251 *nb_high_arg++ = '\0';
2252 *nb_high = atoi(nb_high_arg);
2253 }
2254 else {
2255 *nb_high += *nb_low;
2256 *nb_low = 1;
2257 }
2258
2259 if (*nb_low < 0 || *nb_high < *nb_low)
2260 return -1;
2261
2262 return 0;
2263}
2264
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002265/* Parse as much as possible such a range string argument: low[-high]
2266 * Set <nb_low> and <nb_high> values so that they may be reused by this loop
2267 * for(int i = nb_low; i <= nb_high; i++)... with nb_low >= 1.
2268 *
Ilya Shipitsinba13f162021-03-19 22:21:44 +05002269 * This function is first intended to be used through parse_server to
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002270 * initialize a new server on startup.
2271 *
2272 * Fails if 'low' < 0 or 'high' is present and not higher than 'low'.
2273 * Returns 0 if succeeded, -1 if not.
2274 */
2275static inline void _srv_parse_set_id_from_prefix(struct server *srv,
2276 const char *prefix, int nb)
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002277{
2278 chunk_printf(&trash, "%s%d", prefix, nb);
2279 free(srv->id);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002280 srv->id = strdup(trash.area);
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002281}
2282
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002283/* Initialize as much as possible servers from <srv> server template.
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002284 * Note that a server template is a special server with
2285 * a few different parameters than a server which has
2286 * been parsed mostly the same way as a server.
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002287 *
Ilya Shipitsinba13f162021-03-19 22:21:44 +05002288 * This function is first intended to be used through parse_server to
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002289 * initialize a new server on startup.
2290 *
Joseph Herlant44466822018-11-15 08:57:51 -08002291 * Returns the number of servers successfully allocated,
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002292 * 'srv' template included.
2293 */
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002294static int _srv_parse_tmpl_init(struct server *srv, struct proxy *px)
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002295{
2296 int i;
2297 struct server *newsrv;
2298
2299 for (i = srv->tmpl_info.nb_low + 1; i <= srv->tmpl_info.nb_high; i++) {
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002300 newsrv = new_server(px);
2301 if (!newsrv)
2302 goto err;
2303
Christopher Faulet75bef002020-11-02 22:04:55 +01002304 newsrv->conf.file = strdup(srv->conf.file);
2305 newsrv->conf.line = srv->conf.line;
2306
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002307 srv_settings_cpy(newsrv, srv, 1);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02002308 srv_prepare_for_resolution(newsrv, srv->hostname);
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002309#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
2310 if (newsrv->sni_expr) {
2311 newsrv->ssl_ctx.sni = srv_sni_sample_parse_expr(newsrv, px, NULL, 0, NULL);
2312 if (!newsrv->ssl_ctx.sni)
2313 goto err;
2314 }
2315#endif
Emeric Brun0c4a8a32021-06-11 10:48:45 +02002316 /* append to list of servers available to receive an hostname */
Emeric Brun3ecaf532021-06-14 10:02:18 +02002317 if (newsrv->srvrq)
2318 LIST_APPEND(&newsrv->srvrq->attached_servers, &newsrv->srv_rec_item);
Emeric Brun0c4a8a32021-06-11 10:48:45 +02002319
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002320 /* Set this new server ID. */
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002321 _srv_parse_set_id_from_prefix(newsrv, srv->tmpl_info.prefix, i);
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002322
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002323 /* Linked backwards first. This will be restablished after parsing. */
2324 newsrv->next = px->srv;
2325 px->srv = newsrv;
2326 }
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002327 _srv_parse_set_id_from_prefix(srv, srv->tmpl_info.prefix, srv->tmpl_info.nb_low);
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002328
2329 return i - srv->tmpl_info.nb_low;
2330
2331 err:
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002332 _srv_parse_set_id_from_prefix(srv, srv->tmpl_info.prefix, srv->tmpl_info.nb_low);
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002333 if (newsrv) {
2334#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
2335 release_sample_expr(newsrv->ssl_ctx.sni);
2336#endif
2337 free_check(&newsrv->agent);
2338 free_check(&newsrv->check);
Willy Tarreau2b718102021-04-21 07:32:39 +02002339 LIST_DELETE(&newsrv->global_list);
Frédéric Lécaille72ed4752017-04-14 13:28:00 +02002340 }
2341 free(newsrv);
2342 return i - srv->tmpl_info.nb_low;
2343}
2344
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002345/* Allocate a new server pointed by <srv> and try to parse the first arguments
2346 * in <args> as an address for a server or an address-range for a template or
2347 * nothing for a default-server. <cur_arg> is incremented to the next argument.
2348 *
Ilya Shipitsinba13f162021-03-19 22:21:44 +05002349 * This function is first intended to be used through parse_server to
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002350 * initialize a new server on startup.
2351 *
2352 * A mask of errors is returned. On a parsing error, ERR_FATAL is set. In case
2353 * of memory exhaustion, ERR_ABORT is set. If the server cannot be allocated,
2354 * <srv> will be set to NULL.
2355 */
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002356static int _srv_parse_init(struct server **srv, char **args, int *cur_arg,
2357 struct proxy *curproxy,
2358 int parse_flags, char **errmsg)
Willy Tarreau272adea2014-03-31 10:39:59 +02002359{
2360 struct server *newsrv = NULL;
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002361 const char *err = NULL;
Willy Tarreau272adea2014-03-31 10:39:59 +02002362 int err_code = 0;
Willy Tarreau07101d52015-09-08 16:16:35 +02002363 char *fqdn = NULL;
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002364 int tmpl_range_low = 0, tmpl_range_high = 0;
Willy Tarreau272adea2014-03-31 10:39:59 +02002365
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002366 *srv = NULL;
2367
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002368 /* There is no mandatory first arguments for default server. */
2369 if (parse_flags & SRV_PARSE_PARSE_ADDR) {
2370 if (parse_flags & SRV_PARSE_TEMPLATE) {
2371 if (!*args[3]) {
2372 /* 'server-template' line number of argument check. */
2373 memprintf(errmsg, "'%s' expects <prefix> <nb | range> <addr>[:<port>] as arguments.",
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002374 args[0]);
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002375 err_code |= ERR_ALERT | ERR_FATAL;
2376 goto out;
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002377 }
2378
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002379 err = invalid_prefix_char(args[1]);
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002380 }
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002381 else {
2382 if (!*args[2]) {
2383 /* 'server' line number of argument check. */
2384 memprintf(errmsg, "'%s' expects <name> and <addr>[:<port>] as arguments.",
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002385 args[0]);
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002386 err_code |= ERR_ALERT | ERR_FATAL;
2387 goto out;
2388 }
2389
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002390 err = invalid_char(args[1]);
Willy Tarreau272adea2014-03-31 10:39:59 +02002391 }
2392
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002393 if (err) {
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002394 memprintf(errmsg, "character '%c' is not permitted in %s %s '%s'.",
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002395 *err, args[0], !(parse_flags & SRV_PARSE_TEMPLATE) ? "name" : "prefix", args[1]);
Willy Tarreau272adea2014-03-31 10:39:59 +02002396 err_code |= ERR_ALERT | ERR_FATAL;
2397 goto out;
2398 }
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002399 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002400
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002401 *cur_arg = 2;
2402 if (parse_flags & SRV_PARSE_TEMPLATE) {
2403 /* Parse server-template <nb | range> arg. */
2404 if (_srv_parse_tmpl_range(newsrv, args[*cur_arg], &tmpl_range_low, &tmpl_range_high) < 0) {
2405 memprintf(errmsg, "Wrong %s number or range arg '%s'.",
2406 args[0], args[*cur_arg]);
2407 err_code |= ERR_ALERT | ERR_FATAL;
2408 goto out;
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002409 }
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002410 (*cur_arg)++;
2411 }
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002412
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002413 if (!(parse_flags & SRV_PARSE_DEFAULT_SERVER)) {
2414 struct sockaddr_storage *sk;
2415 int port1, port2, port;
Willy Tarreau272adea2014-03-31 10:39:59 +02002416
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002417 *srv = newsrv = new_server(curproxy);
2418 if (!newsrv) {
2419 memprintf(errmsg, "out of memory.");
2420 err_code |= ERR_ALERT | ERR_ABORT;
2421 goto out;
2422 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002423
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002424 if (parse_flags & SRV_PARSE_TEMPLATE) {
2425 newsrv->tmpl_info.nb_low = tmpl_range_low;
2426 newsrv->tmpl_info.nb_high = tmpl_range_high;
2427 }
Frédéric Lécailleb82f7422017-04-13 18:24:23 +02002428
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01002429 if (parse_flags & SRV_PARSE_DYNAMIC)
2430 newsrv->flags |= SRV_F_DYNAMIC;
2431
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002432 /* Note: for a server template, its id is its prefix.
2433 * This is a temporary id which will be used for server allocations to come
2434 * after parsing.
2435 */
2436 if (!(parse_flags & SRV_PARSE_TEMPLATE))
2437 newsrv->id = strdup(args[1]);
2438 else
2439 newsrv->tmpl_info.prefix = strdup(args[1]);
Willy Tarreau272adea2014-03-31 10:39:59 +02002440
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002441 /* several ways to check the port component :
2442 * - IP => port=+0, relative (IPv4 only)
2443 * - IP: => port=+0, relative
2444 * - IP:N => port=N, absolute
2445 * - IP:+N => port=+N, relative
2446 * - IP:-N => port=-N, relative
2447 */
2448 if (!(parse_flags & SRV_PARSE_PARSE_ADDR))
2449 goto skip_addr;
Frédéric Lécaille355b2032019-01-11 14:06:12 +01002450
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002451 sk = str2sa_range(args[*cur_arg], &port, &port1, &port2, NULL, NULL,
2452 errmsg, NULL, &fqdn,
2453 (parse_flags & SRV_PARSE_INITIAL_RESOLVE ? PA_O_RESOLVE : 0) | PA_O_PORT_OK | PA_O_PORT_OFS | PA_O_STREAM | PA_O_XPRT | PA_O_CONNECT);
2454 if (!sk) {
2455 memprintf(errmsg, "'%s %s' : %s", args[0], args[1], *errmsg);
2456 err_code |= ERR_ALERT | ERR_FATAL;
2457 goto out;
2458 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002459
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002460 if (!port1 || !port2) {
2461 /* no port specified, +offset, -offset */
2462 newsrv->flags |= SRV_F_MAPPORTS;
2463 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002464
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002465 /* save hostname and create associated name resolution */
2466 if (fqdn) {
2467 if (fqdn[0] == '_') { /* SRV record */
2468 /* Check if a SRV request already exists, and if not, create it */
2469 if ((newsrv->srvrq = find_srvrq_by_name(fqdn, curproxy)) == NULL)
2470 newsrv->srvrq = new_resolv_srvrq(newsrv, fqdn);
2471 if (newsrv->srvrq == NULL) {
Christopher Faulet67957bd2017-09-27 11:00:59 +02002472 err_code |= ERR_ALERT | ERR_FATAL;
2473 goto out;
Baptiste Assmann4f91f7e2017-05-03 12:09:54 +02002474 }
Baptiste Assmanna68ca962015-04-14 01:15:08 +02002475 }
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002476 else if (srv_prepare_for_resolution(newsrv, fqdn) == -1) {
2477 memprintf(errmsg, "Can't create DNS resolution for server '%s'",
2478 newsrv->id);
Willy Tarreau272adea2014-03-31 10:39:59 +02002479 err_code |= ERR_ALERT | ERR_FATAL;
2480 goto out;
2481 }
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002482 }
Frédéric Lécaille5c3cd972017-03-15 16:36:09 +01002483
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002484 newsrv->addr = *sk;
2485 newsrv->svc_port = port;
Amaury Denoyelle2f70bb52021-06-08 15:19:51 +02002486 /*
2487 * we don't need to lock the server here, because
2488 * we are in the process of initializing.
2489 *
2490 * Note that the server is not attached into the proxy tree if
2491 * this is a dynamic server.
2492 */
2493 srv_set_addr_desc(newsrv, !(parse_flags & SRV_PARSE_DYNAMIC));
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002494
2495 if (!newsrv->srvrq && !newsrv->hostname && !protocol_by_family(newsrv->addr.ss_family)) {
2496 memprintf(errmsg, "Unknown protocol family %d '%s'",
2497 newsrv->addr.ss_family, args[*cur_arg]);
2498 err_code |= ERR_ALERT | ERR_FATAL;
2499 goto out;
Willy Tarreau272adea2014-03-31 10:39:59 +02002500 }
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002501
2502 (*cur_arg)++;
2503 skip_addr:
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01002504 if (!(parse_flags & SRV_PARSE_DYNAMIC)) {
2505 /* Copy default server settings to new server */
2506 srv_settings_cpy(newsrv, &curproxy->defsrv, 0);
2507 } else {
2508 /* Initialize dynamic server weight to 1 */
2509 newsrv->uweight = newsrv->iweight = 1;
2510
2511 /* A dynamic server is disabled on startup */
2512 newsrv->next_admin = SRV_ADMF_FMAINT;
2513 newsrv->next_state = SRV_ST_STOPPED;
2514 server_recalc_eweight(newsrv, 0);
2515 }
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002516 HA_SPIN_INIT(&newsrv->lock);
2517 }
2518 else {
2519 *srv = newsrv = &curproxy->defsrv;
2520 *cur_arg = 1;
2521 newsrv->resolv_opts.family_prio = AF_INET6;
2522 newsrv->resolv_opts.accept_duplicate_ip = 0;
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002523 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002524
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002525 free(fqdn);
2526 return 0;
Willy Tarreau9faebe32019-06-07 19:00:37 +02002527
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002528out:
2529 free(fqdn);
2530 return err_code;
2531}
Willy Tarreau272adea2014-03-31 10:39:59 +02002532
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002533/* Parse the server keyword in <args>.
2534 * <cur_arg> is incremented beyond the keyword optional value. Note that this
2535 * might not be the case if an error is reported.
2536 *
Ilya Shipitsinba13f162021-03-19 22:21:44 +05002537 * This function is first intended to be used through parse_server to
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002538 * initialize a new server on startup.
2539 *
2540 * A mask of errors is returned. ERR_FATAL is set if the parsing should be
2541 * interrupted.
2542 */
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002543static int _srv_parse_kw(struct server *srv, char **args, int *cur_arg,
2544 struct proxy *curproxy,
2545 int parse_flags, char **errmsg)
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002546{
2547 int err_code = 0;
2548 struct srv_kw *kw;
2549 const char *best;
Willy Tarreau272adea2014-03-31 10:39:59 +02002550
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002551 kw = srv_find_kw(args[*cur_arg]);
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002552 if (!kw) {
2553 best = srv_find_best_kw(args[*cur_arg]);
2554 if (best)
2555 memprintf(errmsg, "unknown keyword '%s'; did you mean '%s' maybe ?",
2556 args[*cur_arg], best);
2557 else
2558 memprintf(errmsg, "unknown keyword '%s'.",
2559 args[*cur_arg]);
Willy Tarreau272adea2014-03-31 10:39:59 +02002560
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002561 return ERR_ALERT | ERR_FATAL;
2562 }
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002563
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002564 if (!kw->parse) {
2565 memprintf(errmsg, "'%s' option is not implemented in this version (check build options)",
2566 args[*cur_arg]);
2567 err_code = ERR_ALERT | ERR_FATAL;
2568 goto out;
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002569 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002570
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002571 if ((parse_flags & SRV_PARSE_DEFAULT_SERVER) && !kw->default_ok) {
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002572 memprintf(errmsg, "'%s' option is not accepted in default-server sections",
2573 args[*cur_arg]);
2574 err_code = ERR_ALERT;
2575 goto out;
2576 }
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01002577 else if ((parse_flags & SRV_PARSE_DYNAMIC) && !kw->dynamic_ok) {
2578 memprintf(errmsg, "'%s' option is not accepted for dynamic server",
2579 args[*cur_arg]);
2580 err_code |= ERR_ALERT;
2581 goto out;
2582 }
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002583
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002584 err_code = kw->parse(args, cur_arg, curproxy, srv, errmsg);
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002585
2586out:
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002587 if (kw->skip != -1)
2588 *cur_arg += 1 + kw->skip;
2589
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002590 return err_code;
2591}
2592
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002593#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
Ilya Shipitsinba13f162021-03-19 22:21:44 +05002594/* This function is first intended to be used through parse_server to
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002595 * initialize a new server on startup.
2596 */
2597static int _srv_parse_sni_expr_init(char **args, int cur_arg,
2598 struct server *srv, struct proxy *proxy,
2599 char **errmsg)
2600{
2601 int ret;
2602
2603 if (!srv->sni_expr)
2604 return 0;
2605
2606 ret = server_parse_sni_expr(srv, proxy, errmsg);
2607 if (!ret)
2608 return 0;
2609
2610 return ret;
2611}
2612#endif
2613
2614/* Server initializations finalization.
2615 * Initialize health check, agent check and SNI expression if enabled.
2616 * Must not be called for a default server instance.
2617 *
Ilya Shipitsinba13f162021-03-19 22:21:44 +05002618 * This function is first intended to be used through parse_server to
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002619 * initialize a new server on startup.
2620 */
2621static int _srv_parse_finalize(char **args, int cur_arg,
2622 struct server *srv, struct proxy *px,
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01002623 int parse_flags, char **errmsg)
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002624{
2625#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
2626 int ret;
2627#endif
2628
2629 if (srv->do_check && srv->trackit) {
2630 memprintf(errmsg, "unable to enable checks and tracking at the same time!");
2631 return ERR_ALERT | ERR_FATAL;
2632 }
2633
2634 if (srv->do_agent && !srv->agent.port) {
2635 memprintf(errmsg, "server %s does not have agent port. Agent check has been disabled.",
2636 srv->id);
2637 return ERR_ALERT | ERR_FATAL;
2638 }
2639
2640#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
2641 if ((ret = _srv_parse_sni_expr_init(args, cur_arg, srv, px, errmsg)) != 0)
2642 return ret;
2643#endif
2644
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01002645 /* A dynamic server is disabled on startup. It must not be counted as
2646 * an active backend entry.
2647 */
2648 if (!(parse_flags & SRV_PARSE_DYNAMIC)) {
2649 if (srv->flags & SRV_F_BACKUP)
2650 px->srv_bck++;
2651 else
2652 px->srv_act++;
2653 }
2654
Amaury Denoyelle7d27efe2021-03-17 14:25:39 +01002655 srv_lb_commit_status(srv);
2656
2657 return 0;
2658}
2659
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002660int parse_server(const char *file, int linenum, char **args,
2661 struct proxy *curproxy, const struct proxy *defproxy,
2662 int parse_flags)
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002663{
2664 struct server *newsrv = NULL;
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002665 char *errmsg = NULL;
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002666 int err_code = 0;
2667
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002668 int cur_arg;
Willy Tarreau272adea2014-03-31 10:39:59 +02002669
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002670 if (!(parse_flags & SRV_PARSE_DEFAULT_SERVER) && curproxy == defproxy) {
2671 ha_alert("parsing [%s:%d] : '%s' not allowed in 'defaults' section.\n", file, linenum, args[0]);
2672 err_code |= ERR_ALERT | ERR_FATAL;
2673 goto out;
2674 }
2675 else if (failifnotcap(curproxy, PR_CAP_BE, file, linenum, args[0], NULL)) {
2676 err_code |= ERR_ALERT | ERR_FATAL;
2677 goto out;
2678 }
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002679
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002680 if ((parse_flags & (SRV_PARSE_IN_PEER_SECTION|SRV_PARSE_PARSE_ADDR)) ==
2681 (SRV_PARSE_IN_PEER_SECTION|SRV_PARSE_PARSE_ADDR)) {
2682 if (!*args[2])
2683 return 0;
2684 }
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002685
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002686 err_code = _srv_parse_init(&newsrv, args, &cur_arg, curproxy,
2687 parse_flags, &errmsg);
2688 if (errmsg) {
2689 ha_alert("parsing [%s:%d] : %s\n", file, linenum, errmsg);
2690 free(errmsg);
2691 }
Amaury Denoyellecf58dd72021-03-08 16:35:54 +01002692
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002693 /* the servers are linked backwards first */
2694 if (newsrv && !(parse_flags & SRV_PARSE_DEFAULT_SERVER)) {
2695 newsrv->next = curproxy->srv;
2696 curproxy->srv = newsrv;
2697 }
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002698
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002699 if (err_code & ERR_CODE)
2700 goto out;
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002701
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002702 newsrv->conf.file = strdup(file);
2703 newsrv->conf.line = linenum;
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002704
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002705 while (*args[cur_arg]) {
2706 errmsg = NULL;
2707 err_code = _srv_parse_kw(newsrv, args, &cur_arg, curproxy,
2708 parse_flags, &errmsg);
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002709
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002710 if (err_code & ERR_ALERT) {
2711 display_parser_err(file, linenum, args, cur_arg, err_code, &errmsg);
2712 free(errmsg);
Amaury Denoyellea8f442e2021-03-08 10:29:33 +01002713 }
Willy Tarreau272adea2014-03-31 10:39:59 +02002714
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002715 if (err_code & ERR_FATAL)
2716 goto out;
2717 }
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002718
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002719 if (!(parse_flags & SRV_PARSE_DEFAULT_SERVER)) {
Amaury Denoyelle76e10e72021-03-08 17:08:01 +01002720 err_code |= _srv_parse_finalize(args, cur_arg, newsrv, curproxy, parse_flags, &errmsg);
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002721 if (err_code) {
2722 display_parser_err(file, linenum, args, cur_arg, err_code, &errmsg);
2723 free(errmsg);
Amaury Denoyelle9394a942021-03-08 11:20:52 +01002724 }
2725
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002726 if (err_code & ERR_FATAL)
2727 goto out;
Willy Tarreau272adea2014-03-31 10:39:59 +02002728 }
Amaury Denoyellecf58dd72021-03-08 16:35:54 +01002729
Amaury Denoyelle30c05372021-03-08 16:36:46 +01002730 if (parse_flags & SRV_PARSE_TEMPLATE)
2731 _srv_parse_tmpl_init(newsrv, curproxy);
2732
Amaury Denoyellef88af882021-06-08 17:00:20 +02002733 /* If the server id is fixed, insert it in the proxy used_id tree.
2734 * This is needed to detect a later duplicate id via srv_parse_id.
2735 *
2736 * If no is specified, a dynamic one is generated in
2737 * check_config_validity.
2738 */
2739 if (newsrv->flags & SRV_F_FORCED_ID)
2740 eb32_insert(&curproxy->conf.used_server_id, &newsrv->conf.id);
2741
Amaury Denoyelle24abb0c2021-05-07 15:13:51 +02002742 HA_DIAG_WARNING_COND((curproxy->cap & PR_CAP_LB) && !newsrv->uweight,
Amaury Denoyelleda0e7f62021-03-30 10:26:27 +02002743 "parsing [%s:%d] : 'server %s' : configured with weight of 0 will never be selected by load balancing algorithms\n",
2744 file, linenum, newsrv->id);
2745
Willy Tarreau272adea2014-03-31 10:39:59 +02002746 return 0;
2747
2748 out:
Willy Tarreau272adea2014-03-31 10:39:59 +02002749 return err_code;
2750}
2751
Baptiste Assmann19a106d2015-07-08 22:03:56 +02002752/* Returns a pointer to the first server matching either id <id>.
2753 * NULL is returned if no match is found.
2754 * the lookup is performed in the backend <bk>
2755 */
2756struct server *server_find_by_id(struct proxy *bk, int id)
2757{
2758 struct eb32_node *eb32;
2759 struct server *curserver;
2760
2761 if (!bk || (id ==0))
2762 return NULL;
2763
2764 /* <bk> has no backend capabilities, so it can't have a server */
2765 if (!(bk->cap & PR_CAP_BE))
2766 return NULL;
2767
2768 curserver = NULL;
2769
2770 eb32 = eb32_lookup(&bk->conf.used_server_id, id);
2771 if (eb32)
2772 curserver = container_of(eb32, struct server, conf.id);
2773
2774 return curserver;
2775}
2776
2777/* Returns a pointer to the first server matching either name <name>, or id
2778 * if <name> starts with a '#'. NULL is returned if no match is found.
2779 * the lookup is performed in the backend <bk>
2780 */
2781struct server *server_find_by_name(struct proxy *bk, const char *name)
2782{
2783 struct server *curserver;
2784
2785 if (!bk || !name)
2786 return NULL;
2787
2788 /* <bk> has no backend capabilities, so it can't have a server */
2789 if (!(bk->cap & PR_CAP_BE))
2790 return NULL;
2791
2792 curserver = NULL;
2793 if (*name == '#') {
2794 curserver = server_find_by_id(bk, atoi(name + 1));
2795 if (curserver)
2796 return curserver;
2797 }
2798 else {
2799 curserver = bk->srv;
2800
2801 while (curserver && (strcmp(curserver->id, name) != 0))
2802 curserver = curserver->next;
2803
2804 if (curserver)
2805 return curserver;
2806 }
2807
2808 return NULL;
2809}
2810
2811struct server *server_find_best_match(struct proxy *bk, char *name, int id, int *diff)
2812{
2813 struct server *byname;
2814 struct server *byid;
2815
2816 if (!name && !id)
2817 return NULL;
2818
2819 if (diff)
2820 *diff = 0;
2821
2822 byname = byid = NULL;
2823
2824 if (name) {
2825 byname = server_find_by_name(bk, name);
2826 if (byname && (!id || byname->puid == id))
2827 return byname;
2828 }
2829
2830 /* remaining possibilities :
2831 * - name not set
2832 * - name set but not found
2833 * - name found but ID doesn't match
2834 */
2835 if (id) {
2836 byid = server_find_by_id(bk, id);
2837 if (byid) {
2838 if (byname) {
2839 /* use id only if forced by configuration */
2840 if (byid->flags & SRV_F_FORCED_ID) {
2841 if (diff)
2842 *diff |= 2;
2843 return byid;
2844 }
2845 else {
2846 if (diff)
2847 *diff |= 1;
2848 return byname;
2849 }
2850 }
2851
2852 /* remaining possibilities:
2853 * - name not set
2854 * - name set but not found
2855 */
2856 if (name && diff)
2857 *diff |= 2;
2858 return byid;
2859 }
2860
2861 /* id bot found */
2862 if (byname) {
2863 if (diff)
2864 *diff |= 1;
2865 return byname;
2866 }
2867 }
2868
2869 return NULL;
2870}
2871
Simon Horman7d09b9a2013-02-12 10:45:51 +09002872/*
Baptiste Assmann14e40142015-04-14 01:13:07 +02002873 * update a server's current IP address.
2874 * ip is a pointer to the new IP address, whose address family is ip_sin_family.
2875 * ip is in network format.
2876 * updater is a string which contains an information about the requester of the update.
2877 * updater is used if not NULL.
2878 *
2879 * A log line and a stderr warning message is generated based on server's backend options.
Willy Tarreau46b7f532018-08-21 11:54:26 +02002880 *
2881 * Must be called with the server lock held.
Baptiste Assmann14e40142015-04-14 01:13:07 +02002882 */
Christopher Faulet69beaa92021-02-16 12:07:47 +01002883int srv_update_addr(struct server *s, void *ip, int ip_sin_family, const char *updater)
Baptiste Assmann14e40142015-04-14 01:13:07 +02002884{
Christopher Fauletd6c6b5f2020-09-08 10:27:24 +02002885 /* save the new IP family & address if necessary */
2886 switch (ip_sin_family) {
2887 case AF_INET:
2888 if (s->addr.ss_family == ip_sin_family &&
2889 !memcmp(ip, &((struct sockaddr_in *)&s->addr)->sin_addr.s_addr, 4))
2890 return 0;
2891 break;
2892 case AF_INET6:
2893 if (s->addr.ss_family == ip_sin_family &&
2894 !memcmp(ip, &((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr, 16))
2895 return 0;
2896 break;
2897 };
2898
Baptiste Assmann14e40142015-04-14 01:13:07 +02002899 /* generates a log line and a warning on stderr */
2900 if (1) {
2901 /* book enough space for both IPv4 and IPv6 */
2902 char oldip[INET6_ADDRSTRLEN];
2903 char newip[INET6_ADDRSTRLEN];
2904
2905 memset(oldip, '\0', INET6_ADDRSTRLEN);
2906 memset(newip, '\0', INET6_ADDRSTRLEN);
2907
2908 /* copy old IP address in a string */
2909 switch (s->addr.ss_family) {
2910 case AF_INET:
2911 inet_ntop(s->addr.ss_family, &((struct sockaddr_in *)&s->addr)->sin_addr, oldip, INET_ADDRSTRLEN);
2912 break;
2913 case AF_INET6:
2914 inet_ntop(s->addr.ss_family, &((struct sockaddr_in6 *)&s->addr)->sin6_addr, oldip, INET6_ADDRSTRLEN);
2915 break;
Christopher Fauletb0b76072020-09-08 10:38:40 +02002916 default:
2917 strcpy(oldip, "(none)");
2918 break;
Baptiste Assmann14e40142015-04-14 01:13:07 +02002919 };
2920
2921 /* copy new IP address in a string */
2922 switch (ip_sin_family) {
2923 case AF_INET:
2924 inet_ntop(ip_sin_family, ip, newip, INET_ADDRSTRLEN);
2925 break;
2926 case AF_INET6:
2927 inet_ntop(ip_sin_family, ip, newip, INET6_ADDRSTRLEN);
2928 break;
2929 };
2930
2931 /* save log line into a buffer */
2932 chunk_printf(&trash, "%s/%s changed its IP from %s to %s by %s",
2933 s->proxy->id, s->id, oldip, newip, updater);
2934
2935 /* write the buffer on stderr */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002936 ha_warning("%s.\n", trash.area);
Baptiste Assmann14e40142015-04-14 01:13:07 +02002937
2938 /* send a log */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002939 send_log(s->proxy, LOG_NOTICE, "%s.\n", trash.area);
Baptiste Assmann14e40142015-04-14 01:13:07 +02002940 }
2941
2942 /* save the new IP family */
2943 s->addr.ss_family = ip_sin_family;
2944 /* save the new IP address */
2945 switch (ip_sin_family) {
2946 case AF_INET:
Willy Tarreaueec1d382016-07-13 11:59:39 +02002947 memcpy(&((struct sockaddr_in *)&s->addr)->sin_addr.s_addr, ip, 4);
Baptiste Assmann14e40142015-04-14 01:13:07 +02002948 break;
2949 case AF_INET6:
2950 memcpy(((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr, ip, 16);
2951 break;
2952 };
Olivier Houchard4e694042017-03-14 20:01:29 +01002953 srv_set_dyncookie(s);
Amaury Denoyelle2f70bb52021-06-08 15:19:51 +02002954 srv_set_addr_desc(s, 1);
Baptiste Assmann14e40142015-04-14 01:13:07 +02002955
2956 return 0;
2957}
2958
William Dauchy7cabc062021-02-11 22:51:24 +01002959/* update agent health check address and port
2960 * addr can be ip4/ip6 or a hostname
2961 * if one error occurs, don't apply anything
2962 * must be called with the server lock held.
2963 */
Christopher Faulet69beaa92021-02-16 12:07:47 +01002964const char *srv_update_agent_addr_port(struct server *s, const char *addr, const char *port)
William Dauchy7cabc062021-02-11 22:51:24 +01002965{
2966 struct sockaddr_storage sk;
2967 struct buffer *msg;
2968 int new_port;
2969
2970 msg = get_trash_chunk();
2971 chunk_reset(msg);
2972
2973 if (!(s->agent.state & CHK_ST_ENABLED)) {
2974 chunk_strcat(msg, "agent checks are not enabled on this server");
2975 goto out;
2976 }
2977 if (addr) {
2978 memset(&sk, 0, sizeof(struct sockaddr_storage));
2979 if (str2ip(addr, &sk) == NULL) {
2980 chunk_appendf(msg, "invalid addr '%s'", addr);
2981 goto out;
2982 }
2983 }
2984 if (port) {
2985 if (strl2irc(port, strlen(port), &new_port) != 0) {
2986 chunk_appendf(msg, "provided port is not an integer");
2987 goto out;
2988 }
2989 if (new_port < 0 || new_port > 65535) {
2990 chunk_appendf(msg, "provided port is invalid");
2991 goto out;
2992 }
2993 }
2994out:
2995 if (msg->data)
2996 return msg->area;
2997 else {
2998 if (addr)
2999 set_srv_agent_addr(s, &sk);
3000 if (port)
3001 set_srv_agent_port(s, new_port);
3002 }
3003 return NULL;
3004}
3005
William Dauchyb456e1f2021-02-11 22:51:23 +01003006/* update server health check address and port
3007 * addr must be ip4 or ip6, it won't be resolved
3008 * if one error occurs, don't apply anything
3009 * must be called with the server lock held.
3010 */
Christopher Faulet69beaa92021-02-16 12:07:47 +01003011const char *srv_update_check_addr_port(struct server *s, const char *addr, const char *port)
William Dauchyb456e1f2021-02-11 22:51:23 +01003012{
3013 struct sockaddr_storage sk;
3014 struct buffer *msg;
3015 int new_port;
3016
3017 msg = get_trash_chunk();
3018 chunk_reset(msg);
3019
3020 if (!(s->check.state & CHK_ST_ENABLED)) {
3021 chunk_strcat(msg, "health checks are not enabled on this server");
3022 goto out;
3023 }
3024 if (addr) {
3025 memset(&sk, 0, sizeof(struct sockaddr_storage));
3026 if (str2ip2(addr, &sk, 0) == NULL) {
3027 chunk_appendf(msg, "invalid addr '%s'", addr);
3028 goto out;
3029 }
3030 }
3031 if (port) {
3032 if (strl2irc(port, strlen(port), &new_port) != 0) {
3033 chunk_appendf(msg, "provided port is not an integer");
3034 goto out;
3035 }
3036 if (new_port < 0 || new_port > 65535) {
3037 chunk_appendf(msg, "provided port is invalid");
3038 goto out;
3039 }
3040 /* prevent the update of port to 0 if MAPPORTS are in use */
3041 if ((s->flags & SRV_F_MAPPORTS) && new_port == 0) {
3042 chunk_appendf(msg, "can't unset 'port' since MAPPORTS is in use");
3043 goto out;
3044 }
3045 }
3046out:
3047 if (msg->data)
3048 return msg->area;
3049 else {
3050 if (addr)
3051 s->check.addr = sk;
3052 if (port)
3053 s->check.port = new_port;
3054 }
3055 return NULL;
3056}
3057
Baptiste Assmann14e40142015-04-14 01:13:07 +02003058/*
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003059 * This function update a server's addr and port only for AF_INET and AF_INET6 families.
3060 *
3061 * Caller can pass its name through <updater> to get it integrated in the response message
3062 * returned by the function.
3063 *
3064 * The function first does the following, in that order:
3065 * - validates the new addr and/or port
3066 * - checks if an update is required (new IP or port is different than current ones)
3067 * - checks the update is allowed:
3068 * - don't switch from/to a family other than AF_INET4 and AF_INET6
3069 * - allow all changes if no CHECKS are configured
3070 * - if CHECK is configured:
3071 * - if switch to port map (SRV_F_MAPPORTS), ensure health check have their own ports
3072 * - applies required changes to both ADDR and PORT if both 'required' and 'allowed'
3073 * conditions are met
Willy Tarreau46b7f532018-08-21 11:54:26 +02003074 *
3075 * Must be called with the server lock held.
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003076 */
Christopher Faulet69beaa92021-02-16 12:07:47 +01003077const char *srv_update_addr_port(struct server *s, const char *addr, const char *port, char *updater)
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003078{
3079 struct sockaddr_storage sa;
3080 int ret, port_change_required;
3081 char current_addr[INET6_ADDRSTRLEN];
David Carlier327298c2016-11-20 10:42:38 +00003082 uint16_t current_port, new_port;
Willy Tarreau83061a82018-07-13 11:56:34 +02003083 struct buffer *msg;
Olivier Houchard4e694042017-03-14 20:01:29 +01003084 int changed = 0;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003085
3086 msg = get_trash_chunk();
3087 chunk_reset(msg);
3088
3089 if (addr) {
3090 memset(&sa, 0, sizeof(struct sockaddr_storage));
3091 if (str2ip2(addr, &sa, 0) == NULL) {
3092 chunk_printf(msg, "Invalid addr '%s'", addr);
3093 goto out;
3094 }
3095
3096 /* changes are allowed on AF_INET* families only */
3097 if ((sa.ss_family != AF_INET) && (sa.ss_family != AF_INET6)) {
3098 chunk_printf(msg, "Update to families other than AF_INET and AF_INET6 supported only through configuration file");
3099 goto out;
3100 }
3101
3102 /* collecting data currently setup */
3103 memset(current_addr, '\0', sizeof(current_addr));
3104 ret = addr_to_str(&s->addr, current_addr, sizeof(current_addr));
3105 /* changes are allowed on AF_INET* families only */
3106 if ((ret != AF_INET) && (ret != AF_INET6)) {
3107 chunk_printf(msg, "Update for the current server address family is only supported through configuration file");
3108 goto out;
3109 }
3110
3111 /* applying ADDR changes if required and allowed
3112 * ipcmp returns 0 when both ADDR are the same
3113 */
3114 if (ipcmp(&s->addr, &sa) == 0) {
3115 chunk_appendf(msg, "no need to change the addr");
3116 goto port;
3117 }
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003118 ipcpy(&sa, &s->addr);
Olivier Houchard4e694042017-03-14 20:01:29 +01003119 changed = 1;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003120
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003121 /* update report for caller */
3122 chunk_printf(msg, "IP changed from '%s' to '%s'", current_addr, addr);
3123 }
3124
3125 port:
3126 if (port) {
3127 char sign = '\0';
3128 char *endptr;
3129
3130 if (addr)
3131 chunk_appendf(msg, ", ");
3132
3133 /* collecting data currently setup */
Willy Tarreau04276f32017-01-06 17:41:29 +01003134 current_port = s->svc_port;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003135
3136 /* check if PORT change is required */
3137 port_change_required = 0;
3138
3139 sign = *port;
Ryabin Sergey77ee7522017-01-11 19:39:55 +04003140 errno = 0;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003141 new_port = strtol(port, &endptr, 10);
3142 if ((errno != 0) || (port == endptr)) {
3143 chunk_appendf(msg, "problem converting port '%s' to an int", port);
3144 goto out;
3145 }
3146
3147 /* check if caller triggers a port mapped or offset */
3148 if (sign == '-' || (sign == '+')) {
3149 /* check if server currently uses port map */
3150 if (!(s->flags & SRV_F_MAPPORTS)) {
3151 /* switch from fixed port to port map mandatorily triggers
3152 * a port change */
3153 port_change_required = 1;
3154 /* check is configured
3155 * we're switching from a fixed port to a SRV_F_MAPPORTS (mapped) port
3156 * prevent PORT change if check doesn't have it's dedicated port while switching
3157 * to port mapping */
William Dauchy69f118d2021-02-03 22:30:07 +01003158 if (!s->check.port) {
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003159 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.");
3160 goto out;
3161 }
3162 }
3163 /* we're already using port maps */
3164 else {
3165 port_change_required = current_port != new_port;
3166 }
3167 }
3168 /* fixed port */
3169 else {
3170 port_change_required = current_port != new_port;
3171 }
3172
3173 /* applying PORT changes if required and update response message */
3174 if (port_change_required) {
3175 /* apply new port */
Willy Tarreau04276f32017-01-06 17:41:29 +01003176 s->svc_port = new_port;
Olivier Houchard4e694042017-03-14 20:01:29 +01003177 changed = 1;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003178
3179 /* prepare message */
3180 chunk_appendf(msg, "port changed from '");
3181 if (s->flags & SRV_F_MAPPORTS)
3182 chunk_appendf(msg, "+");
3183 chunk_appendf(msg, "%d' to '", current_port);
3184
3185 if (sign == '-') {
3186 s->flags |= SRV_F_MAPPORTS;
3187 chunk_appendf(msg, "%c", sign);
3188 /* just use for result output */
3189 new_port = -new_port;
3190 }
3191 else if (sign == '+') {
3192 s->flags |= SRV_F_MAPPORTS;
3193 chunk_appendf(msg, "%c", sign);
3194 }
3195 else {
3196 s->flags &= ~SRV_F_MAPPORTS;
3197 }
3198
3199 chunk_appendf(msg, "%d'", new_port);
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003200 }
3201 else {
3202 chunk_appendf(msg, "no need to change the port");
3203 }
3204 }
3205
3206out:
William Dauchy6318d332020-05-02 21:52:36 +02003207 if (changed) {
3208 /* force connection cleanup on the given server */
3209 srv_cleanup_connections(s);
Olivier Houchard4e694042017-03-14 20:01:29 +01003210 srv_set_dyncookie(s);
Amaury Denoyelle2f70bb52021-06-08 15:19:51 +02003211 srv_set_addr_desc(s, 1);
William Dauchy6318d332020-05-02 21:52:36 +02003212 }
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003213 if (updater)
3214 chunk_appendf(msg, " by '%s'", updater);
3215 chunk_appendf(msg, "\n");
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003216 return msg->area;
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003217}
3218
Christopher Faulet5efdef22021-03-11 18:03:21 +01003219/*
3220 * update server status based on result of SRV resolution
3221 * returns:
3222 * 0 if server status is updated
3223 * 1 if server status has not changed
3224 *
3225 * Must be called with the server lock held.
3226 */
3227int srvrq_update_srv_status(struct server *s, int has_no_ip)
3228{
3229 if (!s->srvrq)
3230 return 1;
3231
3232 /* since this server has an IP, it can go back in production */
3233 if (has_no_ip == 0) {
3234 srv_clr_admin_flag(s, SRV_ADMF_RMAINT);
3235 return 1;
3236 }
3237
3238 if (s->next_admin & SRV_ADMF_RMAINT)
3239 return 1;
3240
3241 srv_set_admin_flag(s, SRV_ADMF_RMAINT, "entry removed from SRV record");
3242 return 0;
3243}
Baptiste Assmannd458adc2016-08-02 08:18:55 +02003244
3245/*
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003246 * update server status based on result of name resolution
3247 * returns:
3248 * 0 if server status is updated
3249 * 1 if server status has not changed
Willy Tarreau46b7f532018-08-21 11:54:26 +02003250 *
3251 * Must be called with the server lock held.
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003252 */
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003253int snr_update_srv_status(struct server *s, int has_no_ip)
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003254{
Emeric Brun750fe792020-12-23 16:51:12 +01003255 struct resolvers *resolvers = s->resolvers;
Christopher Fauletd83a6df2021-03-12 10:23:05 +01003256 struct resolv_resolution *resolution = (s->resolv_requester ? s->resolv_requester->resolution : NULL);
Christopher Faulet67957bd2017-09-27 11:00:59 +02003257 int exp;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003258
Jerome Magnin012261a2020-07-28 13:38:22 +02003259 /* If resolution is NULL we're dealing with SRV records Additional records */
Christopher Faulet5efdef22021-03-11 18:03:21 +01003260 if (resolution == NULL)
3261 return srvrq_update_srv_status(s, has_no_ip);
Jerome Magnin012261a2020-07-28 13:38:22 +02003262
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003263 switch (resolution->status) {
3264 case RSLV_STATUS_NONE:
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003265 /* status when HAProxy has just (re)started.
3266 * Nothing to do, since the task is already automatically started */
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003267 break;
3268
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003269 case RSLV_STATUS_VALID:
3270 /*
3271 * resume health checks
3272 * server will be turned back on if health check is safe
3273 */
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003274 if (has_no_ip) {
Emeric Brun52a91d32017-08-31 14:41:55 +02003275 if (s->next_admin & SRV_ADMF_RMAINT)
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003276 return 1;
3277 srv_set_admin_flag(s, SRV_ADMF_RMAINT,
3278 "No IP for server ");
Christopher Faulet67957bd2017-09-27 11:00:59 +02003279 return 0;
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003280 }
Christopher Faulet67957bd2017-09-27 11:00:59 +02003281
Emeric Brun52a91d32017-08-31 14:41:55 +02003282 if (!(s->next_admin & SRV_ADMF_RMAINT))
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003283 return 1;
3284 srv_clr_admin_flag(s, SRV_ADMF_RMAINT);
3285 chunk_printf(&trash, "Server %s/%s administratively READY thanks to valid DNS answer",
3286 s->proxy->id, s->id);
3287
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003288 ha_warning("%s.\n", trash.area);
3289 send_log(s->proxy, LOG_NOTICE, "%s.\n", trash.area);
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003290 return 0;
3291
3292 case RSLV_STATUS_NX:
3293 /* stop server if resolution is NX for a long enough period */
Christopher Faulet67957bd2017-09-27 11:00:59 +02003294 exp = tick_add(resolution->last_valid, resolvers->hold.nx);
3295 if (!tick_is_expired(exp, now_ms))
3296 break;
3297
3298 if (s->next_admin & SRV_ADMF_RMAINT)
3299 return 1;
3300 srv_set_admin_flag(s, SRV_ADMF_RMAINT, "DNS NX status");
3301 return 0;
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003302
3303 case RSLV_STATUS_TIMEOUT:
3304 /* stop server if resolution is TIMEOUT for a long enough period */
Christopher Faulet67957bd2017-09-27 11:00:59 +02003305 exp = tick_add(resolution->last_valid, resolvers->hold.timeout);
3306 if (!tick_is_expired(exp, now_ms))
3307 break;
3308
3309 if (s->next_admin & SRV_ADMF_RMAINT)
3310 return 1;
3311 srv_set_admin_flag(s, SRV_ADMF_RMAINT, "DNS timeout status");
3312 return 0;
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003313
3314 case RSLV_STATUS_REFUSED:
3315 /* stop server if resolution is REFUSED for a long enough period */
Christopher Faulet67957bd2017-09-27 11:00:59 +02003316 exp = tick_add(resolution->last_valid, resolvers->hold.refused);
3317 if (!tick_is_expired(exp, now_ms))
3318 break;
3319
3320 if (s->next_admin & SRV_ADMF_RMAINT)
3321 return 1;
3322 srv_set_admin_flag(s, SRV_ADMF_RMAINT, "DNS refused status");
3323 return 0;
Baptiste Assmann3b9fe9f2016-11-02 22:58:18 +01003324
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003325 default:
Christopher Faulet67957bd2017-09-27 11:00:59 +02003326 /* stop server if resolution failed for a long enough period */
3327 exp = tick_add(resolution->last_valid, resolvers->hold.other);
3328 if (!tick_is_expired(exp, now_ms))
3329 break;
3330
3331 if (s->next_admin & SRV_ADMF_RMAINT)
3332 return 1;
3333 srv_set_admin_flag(s, SRV_ADMF_RMAINT, "unspecified DNS error");
3334 return 0;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003335 }
3336
3337 return 1;
3338}
3339
3340/*
3341 * Server Name Resolution valid response callback
3342 * It expects:
3343 * - <nameserver>: the name server which answered the valid response
3344 * - <response>: buffer containing a valid DNS response
3345 * - <response_len>: size of <response>
3346 * It performs the following actions:
3347 * - ignore response if current ip found and server family not met
3348 * - update with first new ip found if family is met and current IP is not found
3349 * returns:
3350 * 0 on error
3351 * 1 when no error or safe ignore
Olivier Houchard28381072017-11-06 17:30:28 +01003352 *
3353 * Must be called with server lock held
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003354 */
Emeric Brun08622d32020-12-23 17:41:43 +01003355int snr_resolution_cb(struct resolv_requester *requester, struct dns_counters *counters)
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003356{
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003357 struct server *s = NULL;
Emeric Brun08622d32020-12-23 17:41:43 +01003358 struct resolv_resolution *resolution = NULL;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003359 void *serverip, *firstip;
3360 short server_sin_family, firstip_sin_family;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003361 int ret;
Willy Tarreau83061a82018-07-13 11:56:34 +02003362 struct buffer *chk = get_trash_chunk();
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003363 int has_no_ip = 0;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003364
Christopher Faulet67957bd2017-09-27 11:00:59 +02003365 s = objt_server(requester->owner);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003366 if (!s)
3367 return 1;
3368
Christopher Faulet49531e82021-03-10 15:07:27 +01003369 if (s->srvrq) {
Emeric Brun0c4a8a32021-06-11 10:48:45 +02003370 /* If DNS resolution is disabled ignore it.
3371 * This is the case if the server was associated to
3372 * a SRV record and this record is now expired.
Christopher Faulet49531e82021-03-10 15:07:27 +01003373 */
Emeric Brun0c4a8a32021-06-11 10:48:45 +02003374 if (s->flags & SRV_F_NO_RESOLUTION)
Christopher Faulet49531e82021-03-10 15:07:27 +01003375 return 1;
3376 }
3377
Christopher Fauletd83a6df2021-03-12 10:23:05 +01003378 resolution = (s->resolv_requester ? s->resolv_requester->resolution : NULL);
Christopher Faulet49531e82021-03-10 15:07:27 +01003379 if (!resolution)
3380 return 1;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003381
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003382 /* initializing variables */
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003383 firstip = NULL; /* pointer to the first valid response found */
3384 /* it will be used as the new IP if a change is required */
3385 firstip_sin_family = AF_UNSPEC;
3386 serverip = NULL; /* current server IP address */
3387
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003388 /* initializing server IP pointer */
3389 server_sin_family = s->addr.ss_family;
3390 switch (server_sin_family) {
3391 case AF_INET:
3392 serverip = &((struct sockaddr_in *)&s->addr)->sin_addr.s_addr;
3393 break;
3394
3395 case AF_INET6:
3396 serverip = &((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr;
3397 break;
3398
Willy Tarreau3acfcd12017-01-06 19:18:32 +01003399 case AF_UNSPEC:
3400 break;
3401
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003402 default:
3403 goto invalid;
3404 }
3405
Emeric Brund30e9a12020-12-23 18:49:16 +01003406 ret = resolv_get_ip_from_response(&resolution->response, &s->resolv_opts,
3407 serverip, server_sin_family, &firstip,
3408 &firstip_sin_family, s);
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003409
3410 switch (ret) {
Emeric Brun456de772020-12-23 18:17:31 +01003411 case RSLV_UPD_NO:
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003412 goto update_status;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003413
Emeric Brun456de772020-12-23 18:17:31 +01003414 case RSLV_UPD_SRVIP_NOT_FOUND:
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003415 goto save_ip;
3416
Emeric Brun456de772020-12-23 18:17:31 +01003417 case RSLV_UPD_CNAME:
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003418 goto invalid;
3419
Emeric Brun456de772020-12-23 18:17:31 +01003420 case RSLV_UPD_NO_IP_FOUND:
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003421 has_no_ip = 1;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003422 goto update_status;
Baptiste Assmann0453a1d2015-09-09 00:51:08 +02003423
Emeric Brun456de772020-12-23 18:17:31 +01003424 case RSLV_UPD_NAME_ERROR:
Baptiste Assmannfad03182015-10-28 02:03:32 +01003425 /* update resolution status to OTHER error type */
Christopher Faulet67957bd2017-09-27 11:00:59 +02003426 resolution->status = RSLV_STATUS_OTHER;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003427 goto update_status;
Baptiste Assmannfad03182015-10-28 02:03:32 +01003428
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003429 default:
3430 goto invalid;
3431
3432 }
3433
3434 save_ip:
Emeric Brun50c870e2021-01-04 10:40:46 +01003435 if (counters) {
3436 counters->update++;
Christopher Faulet67957bd2017-09-27 11:00:59 +02003437 /* save the first ip we found */
Emeric Brun50c870e2021-01-04 10:40:46 +01003438 chunk_printf(chk, "%s/%s", counters->pid, counters->id);
Christopher Faulet67957bd2017-09-27 11:00:59 +02003439 }
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003440 else
3441 chunk_printf(chk, "DNS cache");
Christopher Faulet69beaa92021-02-16 12:07:47 +01003442 srv_update_addr(s, firstip, firstip_sin_family, (char *) chk->area);
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003443
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003444 update_status:
Christopher Faulet49531e82021-03-10 15:07:27 +01003445
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003446 snr_update_srv_status(s, has_no_ip);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003447 return 1;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003448
3449 invalid:
Emeric Brun50c870e2021-01-04 10:40:46 +01003450 if (counters) {
3451 counters->invalid++;
Christopher Faulet67957bd2017-09-27 11:00:59 +02003452 goto update_status;
Christopher Faulet3bbd65b2017-09-15 11:55:45 +02003453 }
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003454 snr_update_srv_status(s, has_no_ip);
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003455 return 0;
3456}
3457
3458/*
Baptiste Assmannb4badf72020-11-19 22:38:33 +01003459 * SRV record error management callback
3460 * returns:
Emeric Brun43839d02021-06-10 15:25:25 +02003461 * 0 if we can trash answser items.
3462 * 1 when safely ignored and we must kept answer items
Baptiste Assmannb4badf72020-11-19 22:38:33 +01003463 *
3464 * Grabs the server's lock.
3465 */
3466int srvrq_resolution_error_cb(struct resolv_requester *requester, int error_code)
3467{
Baptiste Assmannb4badf72020-11-19 22:38:33 +01003468 struct resolv_srvrq *srvrq;
3469 struct resolv_resolution *res;
3470 struct resolvers *resolvers;
3471 int exp;
3472
3473 /* SRV records */
3474 srvrq = objt_resolv_srvrq(requester->owner);
3475 if (!srvrq)
Emeric Brun43839d02021-06-10 15:25:25 +02003476 return 0;
Baptiste Assmannb4badf72020-11-19 22:38:33 +01003477
3478 resolvers = srvrq->resolvers;
3479 res = requester->resolution;
3480
3481 switch (res->status) {
3482
3483 case RSLV_STATUS_NX:
3484 /* stop server if resolution is NX for a long enough period */
3485 exp = tick_add(res->last_valid, resolvers->hold.nx);
3486 if (!tick_is_expired(exp, now_ms))
3487 return 1;
3488 break;
3489
3490 case RSLV_STATUS_TIMEOUT:
3491 /* stop server if resolution is TIMEOUT for a long enough period */
3492 exp = tick_add(res->last_valid, resolvers->hold.timeout);
3493 if (!tick_is_expired(exp, now_ms))
3494 return 1;
3495 break;
3496
3497 case RSLV_STATUS_REFUSED:
3498 /* stop server if resolution is REFUSED for a long enough period */
3499 exp = tick_add(res->last_valid, resolvers->hold.refused);
3500 if (!tick_is_expired(exp, now_ms))
3501 return 1;
3502 break;
3503
3504 default:
3505 /* stop server if resolution failed for a long enough period */
3506 exp = tick_add(res->last_valid, resolvers->hold.other);
3507 if (!tick_is_expired(exp, now_ms))
3508 return 1;
3509 }
3510
Emeric Brun0c4a8a32021-06-11 10:48:45 +02003511 /* Remove any associated server ref */
3512 resolv_detach_from_resolution_answer_items(res, requester, 1);
Baptiste Assmannb4badf72020-11-19 22:38:33 +01003513
Emeric Brun43839d02021-06-10 15:25:25 +02003514 return 0;
Baptiste Assmannb4badf72020-11-19 22:38:33 +01003515}
3516
3517/*
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003518 * Server Name Resolution error management callback
3519 * returns:
Emeric Brun43839d02021-06-10 15:25:25 +02003520 * 0 if we can trash answser items.
3521 * 1 when safely ignored and we must kept answer items
Willy Tarreau46b7f532018-08-21 11:54:26 +02003522 *
3523 * Grabs the server's lock.
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003524 */
Emeric Brun08622d32020-12-23 17:41:43 +01003525int snr_resolution_error_cb(struct resolv_requester *requester, int error_code)
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003526{
Christopher Faulet67957bd2017-09-27 11:00:59 +02003527 struct server *s;
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003528
Christopher Faulet67957bd2017-09-27 11:00:59 +02003529 s = objt_server(requester->owner);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003530 if (!s)
Emeric Brun43839d02021-06-10 15:25:25 +02003531 return 0;
3532
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003533 HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
Emeric Brun43839d02021-06-10 15:25:25 +02003534 if (!snr_update_srv_status(s, 1)) {
Christopher Faulet5130c212021-03-10 20:31:40 +01003535 memset(&s->addr, 0, sizeof(s->addr));
Emeric Brun43839d02021-06-10 15:25:25 +02003536 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
Emeric Brun0c4a8a32021-06-11 10:48:45 +02003537 resolv_detach_from_resolution_answer_items(requester->resolution, requester, 1);
Emeric Brun43839d02021-06-10 15:25:25 +02003538 return 0;
3539 }
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003540 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
Emeric Brun43839d02021-06-10 15:25:25 +02003541
Baptiste Assmanna68ca962015-04-14 01:15:08 +02003542 return 1;
3543}
3544
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003545/*
3546 * Function to check if <ip> is already affected to a server in the backend
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003547 * which owns <srv> and is up.
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003548 * It returns a pointer to the first server found or NULL if <ip> is not yet
3549 * assigned.
Olivier Houchard28381072017-11-06 17:30:28 +01003550 *
3551 * Must be called with server lock held
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003552 */
3553struct server *snr_check_ip_callback(struct server *srv, void *ip, unsigned char *ip_family)
3554{
3555 struct server *tmpsrv;
3556 struct proxy *be;
3557
3558 if (!srv)
3559 return NULL;
3560
3561 be = srv->proxy;
3562 for (tmpsrv = be->srv; tmpsrv; tmpsrv = tmpsrv->next) {
Emeric Brune9fd6b52017-11-02 17:20:39 +01003563 /* we found the current server is the same, ignore it */
3564 if (srv == tmpsrv)
3565 continue;
3566
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003567 /* We want to compare the IP in the record with the IP of the servers in the
3568 * same backend, only if:
3569 * * DNS resolution is enabled on the server
3570 * * the hostname used for the resolution by our server is the same than the
3571 * one used for the server found in the backend
3572 * * the server found in the backend is not our current server
3573 */
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003574 HA_SPIN_LOCK(SERVER_LOCK, &tmpsrv->lock);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003575 if ((tmpsrv->hostname_dn == NULL) ||
3576 (srv->hostname_dn_len != tmpsrv->hostname_dn_len) ||
Christopher Faulet59b29252021-03-16 11:21:04 +01003577 (strcasecmp(srv->hostname_dn, tmpsrv->hostname_dn) != 0) ||
Emeric Brune9fd6b52017-11-02 17:20:39 +01003578 (srv->puid == tmpsrv->puid)) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003579 HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003580 continue;
Emeric Brune9fd6b52017-11-02 17:20:39 +01003581 }
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003582
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003583 /* If the server has been taken down, don't consider it */
Emeric Brune9fd6b52017-11-02 17:20:39 +01003584 if (tmpsrv->next_admin & SRV_ADMF_RMAINT) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003585 HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003586 continue;
Emeric Brune9fd6b52017-11-02 17:20:39 +01003587 }
Olivier Houcharda8c6db82017-07-06 18:46:47 +02003588
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003589 /* At this point, we have 2 different servers using the same DNS hostname
3590 * for their respective resolution.
3591 */
3592 if (*ip_family == tmpsrv->addr.ss_family &&
3593 ((tmpsrv->addr.ss_family == AF_INET &&
3594 memcmp(ip, &((struct sockaddr_in *)&tmpsrv->addr)->sin_addr, 4) == 0) ||
3595 (tmpsrv->addr.ss_family == AF_INET6 &&
3596 memcmp(ip, &((struct sockaddr_in6 *)&tmpsrv->addr)->sin6_addr, 16) == 0))) {
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003597 HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003598 return tmpsrv;
3599 }
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003600 HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003601 }
3602
Emeric Brune9fd6b52017-11-02 17:20:39 +01003603
Baptiste Assmannfb7091e2017-05-03 15:43:12 +02003604 return NULL;
3605}
3606
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01003607/* Sets the server's address (srv->addr) from srv->hostname using the libc's
3608 * resolver. This is suited for initial address configuration. Returns 0 on
3609 * success otherwise a non-zero error code. In case of error, *err_code, if
3610 * not NULL, is filled up.
3611 */
3612int srv_set_addr_via_libc(struct server *srv, int *err_code)
3613{
3614 if (str2ip2(srv->hostname, &srv->addr, 1) == NULL) {
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01003615 if (err_code)
Willy Tarreau465b6e52016-11-07 19:19:22 +01003616 *err_code |= ERR_WARN;
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01003617 return 1;
3618 }
3619 return 0;
3620}
3621
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003622/* Set the server's FDQN (->hostname) from <hostname>.
3623 * Returns -1 if failed, 0 if not.
Willy Tarreau46b7f532018-08-21 11:54:26 +02003624 *
3625 * Must be called with the server lock held.
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003626 */
Emeric Brun08622d32020-12-23 17:41:43 +01003627int srv_set_fqdn(struct server *srv, const char *hostname, int resolv_locked)
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003628{
Emeric Brun08622d32020-12-23 17:41:43 +01003629 struct resolv_resolution *resolution;
Christopher Faulet67957bd2017-09-27 11:00:59 +02003630 char *hostname_dn;
3631 int hostname_len, hostname_dn_len;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003632
Frédéric Lécaille5afb3cf2018-08-21 15:04:23 +02003633 /* Note that the server lock is already held. */
3634 if (!srv->resolvers)
3635 return -1;
3636
Emeric Brun08622d32020-12-23 17:41:43 +01003637 if (!resolv_locked)
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003638 HA_SPIN_LOCK(DNS_LOCK, &srv->resolvers->lock);
Christopher Fauletd83a6df2021-03-12 10:23:05 +01003639 /* run time DNS/SRV resolution was not active for this server
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003640 * and we can't enable it at run time for now.
3641 */
Christopher Fauletd83a6df2021-03-12 10:23:05 +01003642 if (!srv->resolv_requester && !srv->srvrq)
Christopher Fauletb2812a62017-10-04 16:17:58 +02003643 goto err;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003644
3645 chunk_reset(&trash);
Christopher Faulet67957bd2017-09-27 11:00:59 +02003646 hostname_len = strlen(hostname);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003647 hostname_dn = trash.area;
Emeric Brund30e9a12020-12-23 18:49:16 +01003648 hostname_dn_len = resolv_str_to_dn_label(hostname, hostname_len + 1,
3649 hostname_dn, trash.size);
Christopher Faulet67957bd2017-09-27 11:00:59 +02003650 if (hostname_dn_len == -1)
Christopher Fauletb2812a62017-10-04 16:17:58 +02003651 goto err;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003652
Christopher Fauletd83a6df2021-03-12 10:23:05 +01003653 resolution = (srv->resolv_requester ? srv->resolv_requester->resolution : NULL);
Christopher Faulet67957bd2017-09-27 11:00:59 +02003654 if (resolution &&
3655 resolution->hostname_dn &&
Christopher Faulet59b29252021-03-16 11:21:04 +01003656 resolution->hostname_dn_len == hostname_dn_len &&
3657 strcasecmp(resolution->hostname_dn, hostname_dn) == 0)
Christopher Fauletb2812a62017-10-04 16:17:58 +02003658 goto end;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003659
Christopher Faulet0efc0992021-03-11 18:09:53 +01003660 resolv_unlink_resolution(srv->resolv_requester, 0);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003661
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003662 free(srv->hostname);
3663 free(srv->hostname_dn);
Christopher Faulet67957bd2017-09-27 11:00:59 +02003664 srv->hostname = strdup(hostname);
3665 srv->hostname_dn = strdup(hostname_dn);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003666 srv->hostname_dn_len = hostname_dn_len;
3667 if (!srv->hostname || !srv->hostname_dn)
Christopher Fauletb2812a62017-10-04 16:17:58 +02003668 goto err;
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003669
Baptiste Assmann13a92322019-06-07 09:40:55 +02003670 if (srv->flags & SRV_F_NO_RESOLUTION)
3671 goto end;
3672
Emeric Brund30e9a12020-12-23 18:49:16 +01003673 if (resolv_link_resolution(srv, OBJ_TYPE_SERVER, 1) == -1)
Christopher Fauletb2812a62017-10-04 16:17:58 +02003674 goto err;
3675
3676 end:
Emeric Brun08622d32020-12-23 17:41:43 +01003677 if (!resolv_locked)
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003678 HA_SPIN_UNLOCK(DNS_LOCK, &srv->resolvers->lock);
Baptiste Assmann201c07f2017-05-22 15:17:15 +02003679 return 0;
Christopher Fauletb2812a62017-10-04 16:17:58 +02003680
3681 err:
Emeric Brun08622d32020-12-23 17:41:43 +01003682 if (!resolv_locked)
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003683 HA_SPIN_UNLOCK(DNS_LOCK, &srv->resolvers->lock);
Christopher Fauletb2812a62017-10-04 16:17:58 +02003684 return -1;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003685}
3686
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01003687/* Sets the server's address (srv->addr) from srv->lastaddr which was filled
3688 * from the state file. This is suited for initial address configuration.
3689 * Returns 0 on success otherwise a non-zero error code. In case of error,
3690 * *err_code, if not NULL, is filled up.
3691 */
3692static int srv_apply_lastaddr(struct server *srv, int *err_code)
3693{
3694 if (!str2ip2(srv->lastaddr, &srv->addr, 0)) {
3695 if (err_code)
3696 *err_code |= ERR_WARN;
3697 return 1;
3698 }
3699 return 0;
3700}
3701
Willy Tarreau25e51522016-11-04 15:10:17 +01003702/* returns 0 if no error, otherwise a combination of ERR_* flags */
3703static int srv_iterate_initaddr(struct server *srv)
3704{
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01003705 char *name = srv->hostname;
Willy Tarreau25e51522016-11-04 15:10:17 +01003706 int return_code = 0;
3707 int err_code;
3708 unsigned int methods;
3709
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01003710 /* If no addr and no hostname set, get the name from the DNS SRV request */
3711 if (!name && srv->srvrq)
3712 name = srv->srvrq->name;
3713
Willy Tarreau25e51522016-11-04 15:10:17 +01003714 methods = srv->init_addr_methods;
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01003715 if (!methods) {
3716 /* otherwise default to "last,libc" */
Willy Tarreau25e51522016-11-04 15:10:17 +01003717 srv_append_initaddr(&methods, SRV_IADDR_LAST);
3718 srv_append_initaddr(&methods, SRV_IADDR_LIBC);
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01003719 if (srv->resolvers_id) {
3720 /* dns resolution is configured, add "none" to not fail on startup */
3721 srv_append_initaddr(&methods, SRV_IADDR_NONE);
3722 }
Willy Tarreau25e51522016-11-04 15:10:17 +01003723 }
3724
Willy Tarreau3eed10e2016-11-07 21:03:16 +01003725 /* "-dr" : always append "none" so that server addresses resolution
3726 * failures are silently ignored, this is convenient to validate some
3727 * configs out of their environment.
3728 */
3729 if (global.tune.options & GTUNE_RESOLVE_DONTFAIL)
3730 srv_append_initaddr(&methods, SRV_IADDR_NONE);
3731
Willy Tarreau25e51522016-11-04 15:10:17 +01003732 while (methods) {
3733 err_code = 0;
3734 switch (srv_get_next_initaddr(&methods)) {
3735 case SRV_IADDR_LAST:
3736 if (!srv->lastaddr)
3737 continue;
3738 if (srv_apply_lastaddr(srv, &err_code) == 0)
Olivier Houchard4e694042017-03-14 20:01:29 +01003739 goto out;
Willy Tarreau25e51522016-11-04 15:10:17 +01003740 return_code |= err_code;
3741 break;
3742
3743 case SRV_IADDR_LIBC:
3744 if (!srv->hostname)
3745 continue;
3746 if (srv_set_addr_via_libc(srv, &err_code) == 0)
Olivier Houchard4e694042017-03-14 20:01:29 +01003747 goto out;
Willy Tarreau25e51522016-11-04 15:10:17 +01003748 return_code |= err_code;
3749 break;
3750
Willy Tarreau37ebe122016-11-04 15:17:58 +01003751 case SRV_IADDR_NONE:
3752 srv_set_admin_flag(srv, SRV_ADMF_RMAINT, NULL);
Willy Tarreau465b6e52016-11-07 19:19:22 +01003753 if (return_code) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01003754 ha_warning("parsing [%s:%d] : 'server %s' : could not resolve address '%s', disabling server.\n",
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01003755 srv->conf.file, srv->conf.line, srv->id, name);
Willy Tarreau465b6e52016-11-07 19:19:22 +01003756 }
Willy Tarreau37ebe122016-11-04 15:17:58 +01003757 return return_code;
3758
Willy Tarreau4310d362016-11-02 15:05:56 +01003759 case SRV_IADDR_IP:
3760 ipcpy(&srv->init_addr, &srv->addr);
3761 if (return_code) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01003762 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 +01003763 srv->conf.file, srv->conf.line, srv->id, name);
Willy Tarreau4310d362016-11-02 15:05:56 +01003764 }
Olivier Houchard4e694042017-03-14 20:01:29 +01003765 goto out;
Willy Tarreau4310d362016-11-02 15:05:56 +01003766
Willy Tarreau25e51522016-11-04 15:10:17 +01003767 default: /* unhandled method */
3768 break;
3769 }
3770 }
3771
3772 if (!return_code) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01003773 ha_alert("parsing [%s:%d] : 'server %s' : no method found to resolve address '%s'\n",
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01003774 srv->conf.file, srv->conf.line, srv->id, name);
Willy Tarreau25e51522016-11-04 15:10:17 +01003775 }
Willy Tarreau465b6e52016-11-07 19:19:22 +01003776 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01003777 ha_alert("parsing [%s:%d] : 'server %s' : could not resolve address '%s'.\n",
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01003778 srv->conf.file, srv->conf.line, srv->id, name);
Willy Tarreau465b6e52016-11-07 19:19:22 +01003779 }
Willy Tarreau25e51522016-11-04 15:10:17 +01003780
3781 return_code |= ERR_ALERT | ERR_FATAL;
3782 return return_code;
Olivier Houchard4e694042017-03-14 20:01:29 +01003783out:
3784 srv_set_dyncookie(srv);
Amaury Denoyelle2f70bb52021-06-08 15:19:51 +02003785 srv_set_addr_desc(srv, 1);
Olivier Houchard4e694042017-03-14 20:01:29 +01003786 return return_code;
Willy Tarreau25e51522016-11-04 15:10:17 +01003787}
3788
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01003789/*
3790 * This function parses all backends and all servers within each backend
3791 * and performs servers' addr resolution based on information provided by:
3792 * - configuration file
3793 * - server-state file (states provided by an 'old' haproxy process)
3794 *
3795 * Returns 0 if no error, otherwise, a combination of ERR_ flags.
3796 */
3797int srv_init_addr(void)
3798{
3799 struct proxy *curproxy;
3800 int return_code = 0;
3801
Olivier Houchardfbc74e82017-11-24 16:54:05 +01003802 curproxy = proxies_list;
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01003803 while (curproxy) {
3804 struct server *srv;
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01003805
3806 /* servers are in backend only */
Amaury Denoyellee3c41922021-01-06 14:28:50 +01003807 if (!(curproxy->cap & PR_CAP_BE) || curproxy->disabled)
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01003808 goto srv_init_addr_next;
3809
Willy Tarreau25e51522016-11-04 15:10:17 +01003810 for (srv = curproxy->srv; srv; srv = srv->next)
Christopher Fauletac1c60fd2020-10-26 10:31:17 +01003811 if (srv->hostname || srv->srvrq)
Willy Tarreau3d609a72017-09-06 14:22:45 +02003812 return_code |= srv_iterate_initaddr(srv);
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01003813
3814 srv_init_addr_next:
3815 curproxy = curproxy->next;
3816 }
3817
3818 return return_code;
3819}
3820
Willy Tarreau46b7f532018-08-21 11:54:26 +02003821/*
3822 * Must be called with the server lock held.
3823 */
Christopher Faulet69beaa92021-02-16 12:07:47 +01003824const char *srv_update_fqdn(struct server *server, const char *fqdn, const char *updater, int resolv_locked)
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003825{
3826
Willy Tarreau83061a82018-07-13 11:56:34 +02003827 struct buffer *msg;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003828
3829 msg = get_trash_chunk();
3830 chunk_reset(msg);
3831
Tim Duesterhuse5ff1412021-01-02 22:31:53 +01003832 if (server->hostname && strcmp(fqdn, server->hostname) == 0) {
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003833 chunk_appendf(msg, "no need to change the FDQN");
3834 goto out;
3835 }
3836
3837 if (strlen(fqdn) > DNS_MAX_NAME_SIZE || invalid_domainchar(fqdn)) {
3838 chunk_appendf(msg, "invalid fqdn '%s'", fqdn);
3839 goto out;
3840 }
3841
3842 chunk_appendf(msg, "%s/%s changed its FQDN from %s to %s",
3843 server->proxy->id, server->id, server->hostname, fqdn);
3844
Emeric Brun08622d32020-12-23 17:41:43 +01003845 if (srv_set_fqdn(server, fqdn, resolv_locked) < 0) {
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003846 chunk_reset(msg);
3847 chunk_appendf(msg, "could not update %s/%s FQDN",
3848 server->proxy->id, server->id);
3849 goto out;
3850 }
3851
3852 /* Flag as FQDN set from stats socket. */
Emeric Brun52a91d32017-08-31 14:41:55 +02003853 server->next_admin |= SRV_ADMF_HMAINT;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003854
3855 out:
3856 if (updater)
3857 chunk_appendf(msg, " by '%s'", updater);
3858 chunk_appendf(msg, "\n");
3859
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003860 return msg->area;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02003861}
3862
3863
Willy Tarreau21b069d2016-11-23 17:15:08 +01003864/* Expects to find a backend and a server in <arg> under the form <backend>/<server>,
3865 * and returns the pointer to the server. Otherwise, display adequate error messages
Willy Tarreau3b6e5472016-11-24 15:53:53 +01003866 * 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 +01003867 * used for CLI commands requiring a server name.
3868 * Important: the <arg> is modified to remove the '/'.
3869 */
3870struct server *cli_find_server(struct appctx *appctx, char *arg)
3871{
3872 struct proxy *px;
3873 struct server *sv;
3874 char *line;
3875
3876 /* split "backend/server" and make <line> point to server */
3877 for (line = arg; *line; line++)
3878 if (*line == '/') {
3879 *line++ = '\0';
3880 break;
3881 }
3882
3883 if (!*line || !*arg) {
Willy Tarreau9d008692019-08-09 11:21:01 +02003884 cli_err(appctx, "Require 'backend/server'.\n");
Willy Tarreau21b069d2016-11-23 17:15:08 +01003885 return NULL;
3886 }
3887
3888 if (!get_backend_server(arg, line, &px, &sv)) {
Willy Tarreau9d008692019-08-09 11:21:01 +02003889 cli_err(appctx, px ? "No such server.\n" : "No such backend.\n");
Willy Tarreau21b069d2016-11-23 17:15:08 +01003890 return NULL;
3891 }
3892
Willy Tarreauc3914d42020-09-24 08:39:22 +02003893 if (px->disabled) {
Willy Tarreau9d008692019-08-09 11:21:01 +02003894 cli_err(appctx, "Proxy is disabled.\n");
Willy Tarreau21b069d2016-11-23 17:15:08 +01003895 return NULL;
3896 }
3897
3898 return sv;
3899}
3900
William Lallemand222baf22016-11-19 02:00:33 +01003901
Willy Tarreau46b7f532018-08-21 11:54:26 +02003902/* grabs the server lock */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02003903static int cli_parse_set_server(char **args, char *payload, struct appctx *appctx, void *private)
William Lallemand222baf22016-11-19 02:00:33 +01003904{
3905 struct server *sv;
3906 const char *warning;
3907
3908 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
3909 return 1;
3910
3911 sv = cli_find_server(appctx, args[2]);
3912 if (!sv)
3913 return 1;
3914
Christopher Faulet2a944ee2017-11-07 10:42:54 +01003915 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Emeric Brun9f0b4582017-10-23 14:39:51 +02003916
William Lallemand222baf22016-11-19 02:00:33 +01003917 if (strcmp(args[3], "weight") == 0) {
3918 warning = server_parse_weight_change_request(sv, args[4]);
Willy Tarreau9d008692019-08-09 11:21:01 +02003919 if (warning)
3920 cli_err(appctx, warning);
William Lallemand222baf22016-11-19 02:00:33 +01003921 }
3922 else if (strcmp(args[3], "state") == 0) {
3923 if (strcmp(args[4], "ready") == 0)
3924 srv_adm_set_ready(sv);
3925 else if (strcmp(args[4], "drain") == 0)
3926 srv_adm_set_drain(sv);
3927 else if (strcmp(args[4], "maint") == 0)
3928 srv_adm_set_maint(sv);
Willy Tarreau9d008692019-08-09 11:21:01 +02003929 else
3930 cli_err(appctx, "'set server <srv> state' expects 'ready', 'drain' and 'maint'.\n");
William Lallemand222baf22016-11-19 02:00:33 +01003931 }
3932 else if (strcmp(args[3], "health") == 0) {
Willy Tarreau9d008692019-08-09 11:21:01 +02003933 if (sv->track)
3934 cli_err(appctx, "cannot change health on a tracking server.\n");
William Lallemand222baf22016-11-19 02:00:33 +01003935 else if (strcmp(args[4], "up") == 0) {
3936 sv->check.health = sv->check.rise + sv->check.fall - 1;
Emeric Brun5a133512017-10-19 14:42:30 +02003937 srv_set_running(sv, "changed from CLI", NULL);
William Lallemand222baf22016-11-19 02:00:33 +01003938 }
3939 else if (strcmp(args[4], "stopping") == 0) {
3940 sv->check.health = sv->check.rise + sv->check.fall - 1;
Emeric Brun5a133512017-10-19 14:42:30 +02003941 srv_set_stopping(sv, "changed from CLI", NULL);
William Lallemand222baf22016-11-19 02:00:33 +01003942 }
3943 else if (strcmp(args[4], "down") == 0) {
3944 sv->check.health = 0;
Emeric Brun5a133512017-10-19 14:42:30 +02003945 srv_set_stopped(sv, "changed from CLI", NULL);
William Lallemand222baf22016-11-19 02:00:33 +01003946 }
Willy Tarreau9d008692019-08-09 11:21:01 +02003947 else
3948 cli_err(appctx, "'set server <srv> health' expects 'up', 'stopping', or 'down'.\n");
William Lallemand222baf22016-11-19 02:00:33 +01003949 }
3950 else if (strcmp(args[3], "agent") == 0) {
Willy Tarreau9d008692019-08-09 11:21:01 +02003951 if (!(sv->agent.state & CHK_ST_ENABLED))
3952 cli_err(appctx, "agent checks are not enabled on this server.\n");
William Lallemand222baf22016-11-19 02:00:33 +01003953 else if (strcmp(args[4], "up") == 0) {
3954 sv->agent.health = sv->agent.rise + sv->agent.fall - 1;
Emeric Brun5a133512017-10-19 14:42:30 +02003955 srv_set_running(sv, "changed from CLI", NULL);
William Lallemand222baf22016-11-19 02:00:33 +01003956 }
3957 else if (strcmp(args[4], "down") == 0) {
3958 sv->agent.health = 0;
Emeric Brun5a133512017-10-19 14:42:30 +02003959 srv_set_stopped(sv, "changed from CLI", NULL);
William Lallemand222baf22016-11-19 02:00:33 +01003960 }
Willy Tarreau9d008692019-08-09 11:21:01 +02003961 else
3962 cli_err(appctx, "'set server <srv> agent' expects 'up' or 'down'.\n");
William Lallemand222baf22016-11-19 02:00:33 +01003963 }
Misiek2da082d2017-01-09 09:40:42 +01003964 else if (strcmp(args[3], "agent-addr") == 0) {
William Dauchy7cabc062021-02-11 22:51:24 +01003965 char *addr = NULL;
3966 char *port = NULL;
3967 if (strlen(args[4]) == 0) {
3968 cli_err(appctx, "set server <b>/<s> agent-addr requires"
3969 " an address and optionally a port.\n");
3970 goto out_unlock;
3971 }
3972 addr = args[4];
3973 if (strcmp(args[5], "port") == 0)
3974 port = args[6];
Christopher Faulet69beaa92021-02-16 12:07:47 +01003975 warning = srv_update_agent_addr_port(sv, addr, port);
William Dauchy7cabc062021-02-11 22:51:24 +01003976 if (warning)
3977 cli_msg(appctx, LOG_WARNING, warning);
3978 }
3979 else if (strcmp(args[3], "agent-port") == 0) {
3980 char *port = NULL;
3981 if (strlen(args[4]) == 0) {
3982 cli_err(appctx, "set server <b>/<s> agent-port requires"
3983 " a port.\n");
3984 goto out_unlock;
3985 }
3986 port = args[4];
Christopher Faulet69beaa92021-02-16 12:07:47 +01003987 warning = srv_update_agent_addr_port(sv, NULL, port);
William Dauchy7cabc062021-02-11 22:51:24 +01003988 if (warning)
3989 cli_msg(appctx, LOG_WARNING, warning);
Misiek2da082d2017-01-09 09:40:42 +01003990 }
3991 else if (strcmp(args[3], "agent-send") == 0) {
Willy Tarreau9d008692019-08-09 11:21:01 +02003992 if (!(sv->agent.state & CHK_ST_ENABLED))
3993 cli_err(appctx, "agent checks are not enabled on this server.\n");
3994 else {
Christopher Faulet0ae3d1d2020-04-06 17:54:24 +02003995 if (!set_srv_agent_send(sv, args[4]))
Willy Tarreau9d008692019-08-09 11:21:01 +02003996 cli_err(appctx, "cannot allocate memory for new string.\n");
Misiek2da082d2017-01-09 09:40:42 +01003997 }
3998 }
William Dauchyb456e1f2021-02-11 22:51:23 +01003999 else if (strcmp(args[3], "check-addr") == 0) {
4000 char *addr = NULL;
4001 char *port = NULL;
4002 if (strlen(args[4]) == 0) {
4003 cli_err(appctx, "set server <b>/<s> check-addr requires"
4004 " an address and optionally a port.\n");
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004005 goto out_unlock;
William Lallemand222baf22016-11-19 02:00:33 +01004006 }
William Dauchyb456e1f2021-02-11 22:51:23 +01004007 addr = args[4];
4008 if (strcmp(args[5], "port") == 0)
4009 port = args[6];
Christopher Faulet69beaa92021-02-16 12:07:47 +01004010 warning = srv_update_check_addr_port(sv, addr, port);
William Dauchyb456e1f2021-02-11 22:51:23 +01004011 if (warning)
4012 cli_msg(appctx, LOG_WARNING, warning);
4013 }
4014 else if (strcmp(args[3], "check-port") == 0) {
4015 char *port = NULL;
4016 if (strlen(args[4]) == 0) {
4017 cli_err(appctx, "set server <b>/<s> check-port requires"
4018 " a port.\n");
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004019 goto out_unlock;
William Lallemand222baf22016-11-19 02:00:33 +01004020 }
William Dauchyb456e1f2021-02-11 22:51:23 +01004021 port = args[4];
Christopher Faulet69beaa92021-02-16 12:07:47 +01004022 warning = srv_update_check_addr_port(sv, NULL, port);
William Dauchyb456e1f2021-02-11 22:51:23 +01004023 if (warning)
4024 cli_msg(appctx, LOG_WARNING, warning);
William Lallemand222baf22016-11-19 02:00:33 +01004025 }
4026 else if (strcmp(args[3], "addr") == 0) {
4027 char *addr = NULL;
4028 char *port = NULL;
4029 if (strlen(args[4]) == 0) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004030 cli_err(appctx, "set server <b>/<s> addr requires an address and optionally a port.\n");
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004031 goto out_unlock;
William Lallemand222baf22016-11-19 02:00:33 +01004032 }
4033 else {
4034 addr = args[4];
4035 }
4036 if (strcmp(args[5], "port") == 0) {
4037 port = args[6];
4038 }
Christopher Faulet69beaa92021-02-16 12:07:47 +01004039 warning = srv_update_addr_port(sv, addr, port, "stats socket command");
Willy Tarreau9d008692019-08-09 11:21:01 +02004040 if (warning)
4041 cli_msg(appctx, LOG_WARNING, warning);
William Lallemand222baf22016-11-19 02:00:33 +01004042 srv_clr_admin_flag(sv, SRV_ADMF_RMAINT);
4043 }
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004044 else if (strcmp(args[3], "fqdn") == 0) {
4045 if (!*args[4]) {
Willy Tarreau9d008692019-08-09 11:21:01 +02004046 cli_err(appctx, "set server <b>/<s> fqdn requires a FQDN.\n");
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004047 goto out_unlock;
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004048 }
Baptiste Assmann13a92322019-06-07 09:40:55 +02004049 /* ensure runtime resolver will process this new fqdn */
4050 if (sv->flags & SRV_F_NO_RESOLUTION) {
4051 sv->flags &= ~SRV_F_NO_RESOLUTION;
4052 }
Christopher Faulet69beaa92021-02-16 12:07:47 +01004053 warning = srv_update_fqdn(sv, args[4], "stats socket command", 0);
Willy Tarreau9d008692019-08-09 11:21:01 +02004054 if (warning)
4055 cli_msg(appctx, LOG_WARNING, warning);
Frédéric Lécailleb418c122017-04-26 11:24:02 +02004056 }
William Dauchyf6370442020-11-14 19:25:33 +01004057 else if (strcmp(args[3], "ssl") == 0) {
4058#ifdef USE_OPENSSL
4059 if (sv->ssl_ctx.ctx == NULL) {
4060 cli_err(appctx, "'set server <srv> ssl' cannot be set. "
4061 " default-server should define ssl settings\n");
4062 goto out_unlock;
4063 } else if (strcmp(args[4], "on") == 0) {
4064 ssl_sock_set_srv(sv, 1);
4065 } else if (strcmp(args[4], "off") == 0) {
4066 ssl_sock_set_srv(sv, 0);
4067 } else {
4068 cli_err(appctx, "'set server <srv> ssl' expects 'on' or 'off'.\n");
4069 goto out_unlock;
4070 }
4071 srv_cleanup_connections(sv);
4072 cli_msg(appctx, LOG_NOTICE, "server ssl setting updated.\n");
4073#else
4074 cli_msg(appctx, LOG_NOTICE, "server ssl setting not supported.\n");
4075#endif
4076 } else {
Willy Tarreau9d008692019-08-09 11:21:01 +02004077 cli_err(appctx,
William Dauchy3f4ec7d2021-02-15 17:22:16 +01004078 "usage: set server <backend>/<server> "
4079 "addr | agent | agent-addr | agent-port | agent-send | "
4080 "check-addr | check-port | fqdn | health | ssl | "
4081 "state | weight\n");
William Lallemand222baf22016-11-19 02:00:33 +01004082 }
Willy Tarreau6ce38f32017-11-05 10:19:23 +01004083 out_unlock:
Christopher Faulet2a944ee2017-11-07 10:42:54 +01004084 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
William Lallemand222baf22016-11-19 02:00:33 +01004085 return 1;
4086}
4087
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004088static int cli_parse_get_weight(char **args, char *payload, struct appctx *appctx, void *private)
William Lallemand6b160942016-11-22 12:34:35 +01004089{
4090 struct stream_interface *si = appctx->owner;
4091 struct proxy *px;
4092 struct server *sv;
4093 char *line;
4094
4095
4096 /* split "backend/server" and make <line> point to server */
4097 for (line = args[2]; *line; line++)
4098 if (*line == '/') {
4099 *line++ = '\0';
4100 break;
4101 }
4102
Willy Tarreau9d008692019-08-09 11:21:01 +02004103 if (!*line)
4104 return cli_err(appctx, "Require 'backend/server'.\n");
William Lallemand6b160942016-11-22 12:34:35 +01004105
Willy Tarreau9d008692019-08-09 11:21:01 +02004106 if (!get_backend_server(args[2], line, &px, &sv))
4107 return cli_err(appctx, px ? "No such server.\n" : "No such backend.\n");
William Lallemand6b160942016-11-22 12:34:35 +01004108
4109 /* return server's effective weight at the moment */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004110 snprintf(trash.area, trash.size, "%d (initial %d)\n", sv->uweight,
4111 sv->iweight);
4112 if (ci_putstr(si_ic(si), trash.area) == -1) {
Willy Tarreaudb398432018-11-15 11:08:52 +01004113 si_rx_room_blk(si);
Christopher Faulet90b5abe2016-12-05 14:25:08 +01004114 return 0;
4115 }
William Lallemand6b160942016-11-22 12:34:35 +01004116 return 1;
4117}
4118
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004119/* Parse a "set weight" command.
4120 *
4121 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004122 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004123static int cli_parse_set_weight(char **args, char *payload, struct appctx *appctx, void *private)
William Lallemand6b160942016-11-22 12:34:35 +01004124{
4125 struct server *sv;
4126 const char *warning;
4127
4128 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4129 return 1;
4130
4131 sv = cli_find_server(appctx, args[2]);
4132 if (!sv)
4133 return 1;
4134
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004135 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
4136
William Lallemand6b160942016-11-22 12:34:35 +01004137 warning = server_parse_weight_change_request(sv, args[3]);
Willy Tarreau9d008692019-08-09 11:21:01 +02004138 if (warning)
4139 cli_err(appctx, warning);
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004140
4141 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
4142
William Lallemand6b160942016-11-22 12:34:35 +01004143 return 1;
4144}
4145
Willy Tarreau46b7f532018-08-21 11:54:26 +02004146/* parse a "set maxconn server" command. It always returns 1.
4147 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004148 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004149 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004150static int cli_parse_set_maxconn_server(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreaub8026272016-11-23 11:26:56 +01004151{
4152 struct server *sv;
4153 const char *warning;
4154
4155 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4156 return 1;
4157
4158 sv = cli_find_server(appctx, args[3]);
4159 if (!sv)
4160 return 1;
4161
4162 warning = server_parse_maxconn_change_request(sv, args[4]);
Willy Tarreau9d008692019-08-09 11:21:01 +02004163 if (warning)
4164 cli_err(appctx, warning);
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004165
Willy Tarreaub8026272016-11-23 11:26:56 +01004166 return 1;
4167}
William Lallemand6b160942016-11-22 12:34:35 +01004168
Willy Tarreau46b7f532018-08-21 11:54:26 +02004169/* parse a "disable agent" command. It always returns 1.
4170 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004171 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004172 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004173static int cli_parse_disable_agent(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004174{
4175 struct server *sv;
4176
4177 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4178 return 1;
4179
4180 sv = cli_find_server(appctx, args[2]);
4181 if (!sv)
4182 return 1;
4183
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004184 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004185 sv->agent.state &= ~CHK_ST_ENABLED;
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004186 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004187 return 1;
4188}
4189
Willy Tarreau46b7f532018-08-21 11:54:26 +02004190/* parse a "disable health" command. It always returns 1.
4191 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004192 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004193 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004194static int cli_parse_disable_health(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004195{
4196 struct server *sv;
4197
4198 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4199 return 1;
4200
4201 sv = cli_find_server(appctx, args[2]);
4202 if (!sv)
4203 return 1;
4204
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004205 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004206 sv->check.state &= ~CHK_ST_ENABLED;
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004207 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004208 return 1;
4209}
4210
Willy Tarreau46b7f532018-08-21 11:54:26 +02004211/* parse a "disable server" command. It always returns 1.
4212 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004213 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004214 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004215static int cli_parse_disable_server(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreauffb4d582016-11-24 12:47:00 +01004216{
4217 struct server *sv;
4218
4219 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4220 return 1;
4221
4222 sv = cli_find_server(appctx, args[2]);
4223 if (!sv)
4224 return 1;
4225
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004226 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreauffb4d582016-11-24 12:47:00 +01004227 srv_adm_set_maint(sv);
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004228 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreauffb4d582016-11-24 12:47:00 +01004229 return 1;
4230}
4231
Willy Tarreau46b7f532018-08-21 11:54:26 +02004232/* parse a "enable agent" command. It always returns 1.
4233 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004234 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004235 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004236static int cli_parse_enable_agent(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004237{
4238 struct server *sv;
4239
4240 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4241 return 1;
4242
4243 sv = cli_find_server(appctx, args[2]);
4244 if (!sv)
4245 return 1;
4246
Willy Tarreau9d008692019-08-09 11:21:01 +02004247 if (!(sv->agent.state & CHK_ST_CONFIGURED))
4248 return cli_err(appctx, "Agent was not configured on this server, cannot enable.\n");
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004249
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004250 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004251 sv->agent.state |= CHK_ST_ENABLED;
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004252 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau58d9cb72016-11-24 12:56:01 +01004253 return 1;
4254}
4255
Willy Tarreau46b7f532018-08-21 11:54:26 +02004256/* parse a "enable health" command. It always returns 1.
4257 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004258 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004259 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004260static int cli_parse_enable_health(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004261{
4262 struct server *sv;
4263
4264 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4265 return 1;
4266
4267 sv = cli_find_server(appctx, args[2]);
4268 if (!sv)
4269 return 1;
4270
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004271 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004272 sv->check.state |= CHK_ST_ENABLED;
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004273 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreau2c04eda2016-11-24 12:51:04 +01004274 return 1;
4275}
4276
Willy Tarreau46b7f532018-08-21 11:54:26 +02004277/* parse a "enable server" command. It always returns 1.
4278 *
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004279 * Grabs the server lock.
Willy Tarreau46b7f532018-08-21 11:54:26 +02004280 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02004281static int cli_parse_enable_server(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreauffb4d582016-11-24 12:47:00 +01004282{
4283 struct server *sv;
4284
4285 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4286 return 1;
4287
4288 sv = cli_find_server(appctx, args[2]);
4289 if (!sv)
4290 return 1;
4291
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004292 HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
Willy Tarreauffb4d582016-11-24 12:47:00 +01004293 srv_adm_set_ready(sv);
Olivier Houcharde9bad0a2018-01-17 17:39:34 +01004294 if (!(sv->flags & SRV_F_COOKIESET)
4295 && (sv->proxy->ck_opts & PR_CK_DYNAMIC) &&
4296 sv->cookie)
4297 srv_check_for_dup_dyncookie(sv);
Willy Tarreau3bcc2692018-08-21 15:35:31 +02004298 HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
Willy Tarreauffb4d582016-11-24 12:47:00 +01004299 return 1;
4300}
4301
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004302/* Allocates data structure related to load balancing for the server <sv>. It
4303 * is only required for dynamic servers.
4304 *
4305 * At the moment, the server lock is not used as this function is only called
4306 * for a dynamic server not yet registered.
4307 *
4308 * Returns 1 on success, 0 on allocation failure.
4309 */
4310static int srv_alloc_lb(struct server *sv, struct proxy *be)
4311{
4312 int node;
4313
4314 sv->lb_tree = (sv->flags & SRV_F_BACKUP) ?
4315 &be->lbprm.chash.bck : &be->lbprm.chash.act;
4316 sv->lb_nodes_tot = sv->uweight * BE_WEIGHT_SCALE;
4317 sv->lb_nodes_now = 0;
4318
Willy Tarreaudcb121f2021-04-20 11:37:45 +02004319 if (((be->lbprm.algo & (BE_LB_KIND | BE_LB_PARM)) == (BE_LB_KIND_RR | BE_LB_RR_RANDOM)) ||
4320 ((be->lbprm.algo & (BE_LB_KIND | BE_LB_HASH_TYPE)) == (BE_LB_KIND_HI | BE_LB_HASH_CONS))) {
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004321 sv->lb_nodes = calloc(sv->lb_nodes_tot, sizeof(*sv->lb_nodes));
4322
4323 if (!sv->lb_nodes)
4324 return 0;
4325
4326 for (node = 0; node < sv->lb_nodes_tot; node++) {
4327 sv->lb_nodes[node].server = sv;
4328 sv->lb_nodes[node].node.key = full_hash(sv->puid * SRV_EWGHT_RANGE + node);
4329 }
4330 }
4331
4332 return 1;
4333}
4334
4335/* Parse a "add server" command
4336 * Returns 0 if the server has been successfully initialized, 1 on failure.
4337 */
4338static int cli_parse_add_server(char **args, char *payload, struct appctx *appctx, void *private)
4339{
4340 struct proxy *be;
4341 struct server *srv;
4342 char *be_name, *sv_name;
4343 char *errmsg = NULL;
4344 int errcode, argc;
Amaury Denoyelle12173562021-06-09 09:58:47 +02004345 int next_id, i;
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004346 const int parse_flags = SRV_PARSE_DYNAMIC|SRV_PARSE_PARSE_ADDR;
4347
4348 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4349 return 1;
4350
4351 ++args;
4352
4353 sv_name = be_name = args[1];
4354 /* split backend/server arg */
4355 while (*sv_name && *(++sv_name)) {
4356 if (*sv_name == '/') {
4357 *sv_name = '\0';
4358 ++sv_name;
4359 break;
4360 }
4361 }
4362
4363 if (!*sv_name)
4364 return cli_err(appctx, "Require 'backend/server'.");
4365
Amaury Denoyellecece9182021-04-20 17:09:08 +02004366 be = proxy_be_by_name(be_name);
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004367 if (!be)
4368 return cli_err(appctx, "No such backend.");
4369
4370 if (!(be->lbprm.algo & BE_LB_PROP_DYN)) {
Amaury Denoyelleeafd7012021-04-29 14:59:42 +02004371 cli_err(appctx, "Backend must use a dynamic load balancing to support dynamic servers.");
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004372 return 1;
4373 }
4374
Amaury Denoyelled50d4bf2021-06-10 15:26:44 +02004375 /* At this point, some operations might not be thread-safe anymore. This
4376 * might be the case for parsing handlers which were designed to run
4377 * only at the starting stage on single-thread mode.
4378 *
4379 * Activate thread isolation to ensure thread-safety.
4380 */
4381 thread_isolate();
4382
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004383 args[1] = sv_name;
4384 errcode = _srv_parse_init(&srv, args, &argc, be, parse_flags, &errmsg);
4385 if (errcode) {
4386 if (errmsg)
4387 cli_dynerr(appctx, errmsg);
4388 goto out;
4389 }
4390
4391 while (*args[argc]) {
4392 errcode = _srv_parse_kw(srv, args, &argc, be, parse_flags, &errmsg);
4393
4394 if (errcode) {
4395 if (errmsg)
4396 cli_dynerr(appctx, errmsg);
4397 goto out;
4398 }
4399 }
4400
4401 _srv_parse_finalize(args, argc, srv, be, parse_flags, &errmsg);
4402 if (errmsg) {
4403 cli_dynerr(appctx, errmsg);
4404 goto out;
4405 }
4406
Amaury Denoyellee9bb7fb2021-06-10 17:34:10 +02004407 /* A dynamic server does not currently support resolution.
4408 *
4409 * Initialize it explicitly to the "none" method to ensure no
4410 * resolution will ever be executed.
4411 */
4412 srv->init_addr_methods = SRV_IADDR_NONE;
4413
Amaury Denoyelle30467232021-03-12 18:03:27 +01004414 if (srv->mux_proto) {
4415 if (!conn_get_best_mux_entry(srv->mux_proto->token, PROTO_SIDE_BE, be->mode)) {
4416 cli_err(appctx, "MUX protocol is not usable for server.");
4417 goto out;
4418 }
4419 }
4420
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004421 srv->per_thr = calloc(global.nbthread, sizeof(*srv->per_thr));
4422 if (!srv->per_thr) {
4423 cli_err(appctx, "failed to allocate per-thread lists for server.");
4424 goto out;
4425 }
4426
4427 for (i = 0; i < global.nbthread; i++) {
4428 srv->per_thr[i].idle_conns = EB_ROOT;
4429 srv->per_thr[i].safe_conns = EB_ROOT;
4430 srv->per_thr[i].avail_conns = EB_ROOT;
4431 MT_LIST_INIT(&srv->per_thr[i].streams);
4432 }
4433
4434 if (srv->max_idle_conns != 0) {
4435 srv->curr_idle_thr = calloc(global.nbthread, sizeof(*srv->curr_idle_thr));
4436 if (!srv->curr_idle_thr) {
4437 cli_err(appctx, "failed to allocate counters for server.");
4438 goto out;
4439 }
4440 }
4441
4442 if (!srv_alloc_lb(srv, be)) {
4443 cli_err(appctx, "Failed to initialize load-balancing data.");
4444 goto out;
4445 }
4446
4447 if (!stats_allocate_proxy_counters_internal(&srv->extra_counters,
4448 COUNTERS_SV,
4449 STATS_PX_CAP_SRV)) {
4450 cli_err(appctx, "failed to allocate extra counters for server.");
4451 goto out;
4452 }
4453
Amaury Denoyelled50d4bf2021-06-10 15:26:44 +02004454 /* Attach the server to the end of the proxy linked list. Note that this
4455 * operation is not thread-safe so this is executed under thread
4456 * isolation.
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004457 *
Amaury Denoyelled50d4bf2021-06-10 15:26:44 +02004458 * If a server with the same name is found, reject the new one.
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004459 */
Amaury Denoyellecece9182021-04-20 17:09:08 +02004460
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004461 /* TODO use a double-linked list for px->srv */
4462 if (be->srv) {
Amaury Denoyellecece9182021-04-20 17:09:08 +02004463 struct server *next = be->srv;
4464
4465 while (1) {
4466 /* check for duplicate server */
4467 if (!strcmp(srv->id, next->id)) {
Amaury Denoyellecece9182021-04-20 17:09:08 +02004468 cli_err(appctx, "Already exists a server with the same name in backend.");
4469 goto out;
4470 }
4471
4472 if (!next->next)
4473 break;
4474
4475 next = next->next;
4476 }
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004477
4478 next->next = srv;
4479 }
4480 else {
4481 srv->next = be->srv;
4482 be->srv = srv;
4483 }
Amaury Denoyellecece9182021-04-20 17:09:08 +02004484
Amaury Denoyelle12173562021-06-09 09:58:47 +02004485 /* generate the server id if not manually specified */
4486 if (!srv->puid) {
4487 next_id = get_next_id(&be->conf.used_server_id, 1);
4488 if (!next_id) {
4489 ha_alert("Cannot attach server : no id left in proxy\n");
4490 goto out;
4491 }
4492
4493 srv->conf.id.key = srv->puid = next_id;
4494 srv->conf.name.key = srv->id;
4495 }
4496
4497 /* insert the server in the backend trees */
Amaury Denoyellef88af882021-06-08 17:00:20 +02004498 eb32_insert(&be->conf.used_server_id, &srv->conf.id);
4499 ebis_insert(&be->conf.used_server_name, &srv->conf.name);
Amaury Denoyelle2f70bb52021-06-08 15:19:51 +02004500 ebis_insert(&be->used_server_addr, &srv->addr_node);
Amaury Denoyelle12173562021-06-09 09:58:47 +02004501
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004502 thread_release();
4503
Amaury Denoyelled38e7fa2021-04-20 18:35:19 +02004504 ha_notice("New server %s/%s registered.\n", be->id, srv->id);
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004505 cli_msg(appctx, LOG_INFO, "New server registered.");
4506
4507 return 0;
4508
4509out:
Amaury Denoyelled50d4bf2021-06-10 15:26:44 +02004510 thread_release();
Amaury Denoyellef99f77a2021-03-08 17:13:32 +01004511 if (srv)
4512 free_server(srv);
4513 return 1;
4514}
4515
Amaury Denoyellee5580432021-04-15 14:41:20 +02004516/* Parse a "del server" command
4517 * Returns 0 if the server has been successfully initialized, 1 on failure.
4518 */
4519static int cli_parse_delete_server(char **args, char *payload, struct appctx *appctx, void *private)
4520{
4521 struct proxy *be;
4522 struct server *srv;
4523 char *be_name, *sv_name;
4524
4525 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
4526 return 1;
4527
4528 ++args;
4529
4530 sv_name = be_name = args[1];
4531 /* split backend/server arg */
4532 while (*sv_name && *(++sv_name)) {
4533 if (*sv_name == '/') {
4534 *sv_name = '\0';
4535 ++sv_name;
4536 break;
4537 }
4538 }
4539
4540 if (!*sv_name)
4541 return cli_err(appctx, "Require 'backend/server'.");
4542
4543 /* The proxy servers list is currently not protected by a lock so this
4544 * requires thread isolation.
4545 */
4546
4547 /* WARNING there is maybe a potential violation of the thread isolation
4548 * mechanism by the pool allocator. The allocator marks the thread as
4549 * harmless before the allocation, but a processing outside of it could
4550 * relies on a particular server triggered at the same time by a
4551 * 'delete server'. Currently, it is unknown if such case is present in
4552 * the current code. If it happens to be, the thread isolation
4553 * mechanism should be improved, maybe with a differentiation between
4554 * read and read+write safe sections.
4555 */
4556 thread_isolate();
4557
4558 get_backend_server(be_name, sv_name, &be, &srv);
4559 if (!be) {
4560 cli_err(appctx, "No such backend.");
4561 goto out;
4562 }
4563
4564 if (!srv) {
4565 cli_err(appctx, "No such server.");
4566 goto out;
4567 }
4568
4569 if (!(srv->flags & SRV_F_DYNAMIC)) {
4570 cli_err(appctx, "Only servers added at runtime via <add server> CLI cmd can be deleted.");
4571 goto out;
4572 }
4573
4574 /* Only servers in maintenance can be deleted. This ensures that the
4575 * server is not present anymore in the lb structures (through
4576 * lbprm.set_server_status_down).
4577 */
4578 if (!(srv->cur_admin & SRV_ADMF_MAINT)) {
4579 cli_err(appctx, "Only servers in maintenance mode can be deleted.");
4580 goto out;
4581 }
4582
4583 /* Ensure that there is no active/idle/pending connection on the server.
4584 *
4585 * TODO idle connections should not prevent server deletion. A proper
4586 * cleanup function should be implemented to be used here.
4587 */
4588 if (srv->cur_sess || srv->curr_idle_conns ||
4589 !eb_is_empty(&srv->pendconns)) {
4590 cli_err(appctx, "Server still has connections attached to it, cannot remove it.");
4591 goto out;
4592 }
4593
4594 /* TODO remove server for check list once 'check' will be implemented for
4595 * dynamic servers
4596 */
4597
4598 /* detach the server from the proxy linked list
4599 * The proxy servers list is currently not protected by a lock, so this
4600 * requires thread_isolate/release.
4601 */
4602
4603 /* be->srv cannot be empty since we have already found the server with
4604 * get_backend_server */
4605 BUG_ON(!be->srv);
4606 if (be->srv == srv) {
4607 be->srv = srv->next;
4608 }
4609 else {
4610 struct server *next;
Amaury Denoyelled6b4b6d2021-04-21 11:50:26 +02004611 for (next = be->srv; srv != next->next; next = next->next) {
4612 /* srv cannot be not found since we have already found
4613 * it with get_backend_server */
4614 BUG_ON(!next);
4615 }
Amaury Denoyellee5580432021-04-15 14:41:20 +02004616
Amaury Denoyellee5580432021-04-15 14:41:20 +02004617 next->next = srv->next;
4618 }
4619
4620 /* remove srv from addr_node tree */
Amaury Denoyelle40ad9f42021-06-09 16:00:43 +02004621 eb32_delete(&srv->conf.id);
4622 ebpt_delete(&srv->conf.name);
Amaury Denoyellee5580432021-04-15 14:41:20 +02004623 ebpt_delete(&srv->addr_node);
4624
4625 /* remove srv from idle_node tree for idle conn cleanup */
4626 eb32_delete(&srv->idle_node);
4627
4628 thread_release();
4629
4630 ha_notice("Server %s/%s deleted.\n", be->id, srv->id);
4631 free_server(srv);
4632
4633 cli_msg(appctx, LOG_INFO, "Server deleted.");
4634
4635 return 0;
4636
4637out:
4638 thread_release();
4639
4640 return 1;
4641}
4642
William Lallemand222baf22016-11-19 02:00:33 +01004643/* register cli keywords */
4644static struct cli_kw_list cli_kws = {{ },{
Willy Tarreaub205bfd2021-05-07 11:38:37 +02004645 { { "disable", "agent", NULL }, "disable agent (DEPRECATED) : disable agent checks (use 'set server' instead)", cli_parse_disable_agent, NULL },
4646 { { "disable", "health", NULL }, "disable health (DEPRECATED) : disable health checks (use 'set server' instead)", cli_parse_disable_health, NULL },
4647 { { "disable", "server", NULL }, "disable server (DEPRECATED) : disable a server for maintenance (use 'set server' instead)", cli_parse_disable_server, NULL },
4648 { { "enable", "agent", NULL }, "enable agent (DEPRECATED) : enable agent checks (use 'set server' instead)", cli_parse_enable_agent, NULL },
4649 { { "enable", "health", NULL }, "enable health (DEPRECATED) : enable health checks (use 'set server' instead)", cli_parse_enable_health, NULL },
4650 { { "enable", "server", NULL }, "enable server (DEPRECATED) : enable a disabled server (use 'set server' instead)", cli_parse_enable_server, NULL },
4651 { { "set", "maxconn", "server", NULL }, "set maxconn server <bk>/<srv> : change a server's maxconn setting", cli_parse_set_maxconn_server, NULL },
4652 { { "set", "server", NULL }, "set server <bk>/<srv> [opts] : change a server's state, weight, address or ssl", cli_parse_set_server },
4653 { { "get", "weight", NULL }, "get weight <bk>/<srv> : report a server's current weight", cli_parse_get_weight },
4654 { { "set", "weight", NULL }, "set weight <bk>/<srv> (DEPRECATED) : change a server's weight (use 'set server' instead)", cli_parse_set_weight },
4655 { { "add", "server", NULL }, "add server <bk>/<srv> : create a new server (EXPERIMENTAL)", cli_parse_add_server, NULL, NULL, NULL, ACCESS_EXPERIMENTAL },
4656 { { "del", "server", NULL }, "del server <bk>/<srv> : remove a dynamically added server (EXPERIMENTAL)", cli_parse_delete_server, NULL, NULL, NULL, ACCESS_EXPERIMENTAL },
William Lallemand222baf22016-11-19 02:00:33 +01004657 {{},}
4658}};
4659
Willy Tarreau0108d902018-11-25 19:14:37 +01004660INITCALL1(STG_REGISTER, cli_register_kw, &cli_kws);
Baptiste Assmann83cbaa52016-11-02 15:34:05 +01004661
Emeric Brun64cc49c2017-10-03 14:46:45 +02004662/*
4663 * This function applies server's status changes, it is
4664 * is designed to be called asynchronously.
4665 *
Willy Tarreau1e690bb2020-10-22 11:30:59 +02004666 * Must be called with the server lock held. This may also be called at init
4667 * time as the result of parsing the state file, in which case no lock will be
4668 * held, and the server's warmup task can be null.
Emeric Brun64cc49c2017-10-03 14:46:45 +02004669 */
Willy Tarreau3ff577e2018-08-02 11:48:52 +02004670static void srv_update_status(struct server *s)
Emeric Brun64cc49c2017-10-03 14:46:45 +02004671{
4672 struct check *check = &s->check;
4673 int xferred;
4674 struct proxy *px = s->proxy;
4675 int prev_srv_count = s->proxy->srv_bck + s->proxy->srv_act;
4676 int srv_was_stopping = (s->cur_state == SRV_ST_STOPPING) || (s->cur_admin & SRV_ADMF_DRAIN);
4677 int log_level;
Willy Tarreau83061a82018-07-13 11:56:34 +02004678 struct buffer *tmptrash = NULL;
Emeric Brun64cc49c2017-10-03 14:46:45 +02004679
Emeric Brun64cc49c2017-10-03 14:46:45 +02004680 /* If currently main is not set we try to apply pending state changes */
4681 if (!(s->cur_admin & SRV_ADMF_MAINT)) {
4682 int next_admin;
4683
4684 /* Backup next admin */
4685 next_admin = s->next_admin;
4686
4687 /* restore current admin state */
4688 s->next_admin = s->cur_admin;
4689
4690 if ((s->cur_state != SRV_ST_STOPPED) && (s->next_state == SRV_ST_STOPPED)) {
4691 s->last_change = now.tv_sec;
4692 if (s->proxy->lbprm.set_server_status_down)
4693 s->proxy->lbprm.set_server_status_down(s);
4694
4695 if (s->onmarkeddown & HANA_ONMARKEDDOWN_SHUTDOWNSESSIONS)
4696 srv_shutdown_streams(s, SF_ERR_DOWN);
4697
4698 /* we might have streams queued on this server and waiting for
4699 * a connection. Those which are redispatchable will be queued
4700 * to another server or to the proxy itself.
4701 */
4702 xferred = pendconn_redistribute(s);
4703
4704 tmptrash = alloc_trash_chunk();
4705 if (tmptrash) {
4706 chunk_printf(tmptrash,
4707 "%sServer %s/%s is DOWN", s->flags & SRV_F_BACKUP ? "Backup " : "",
4708 s->proxy->id, s->id);
4709
Emeric Brun5a133512017-10-19 14:42:30 +02004710 srv_append_status(tmptrash, s, NULL, xferred, 0);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004711 ha_warning("%s.\n", tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004712
4713 /* we don't send an alert if the server was previously paused */
4714 log_level = srv_was_stopping ? LOG_NOTICE : LOG_ALERT;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004715 send_log(s->proxy, log_level, "%s.\n",
4716 tmptrash->area);
4717 send_email_alert(s, log_level, "%s",
4718 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004719 free_trash_chunk(tmptrash);
4720 tmptrash = NULL;
4721 }
4722 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
4723 set_backend_down(s->proxy);
4724
4725 s->counters.down_trans++;
4726 }
4727 else if ((s->cur_state != SRV_ST_STOPPING) && (s->next_state == SRV_ST_STOPPING)) {
4728 s->last_change = now.tv_sec;
4729 if (s->proxy->lbprm.set_server_status_down)
4730 s->proxy->lbprm.set_server_status_down(s);
4731
4732 /* we might have streams queued on this server and waiting for
4733 * a connection. Those which are redispatchable will be queued
4734 * to another server or to the proxy itself.
4735 */
4736 xferred = pendconn_redistribute(s);
4737
4738 tmptrash = alloc_trash_chunk();
4739 if (tmptrash) {
4740 chunk_printf(tmptrash,
4741 "%sServer %s/%s is stopping", s->flags & SRV_F_BACKUP ? "Backup " : "",
4742 s->proxy->id, s->id);
4743
Emeric Brun5a133512017-10-19 14:42:30 +02004744 srv_append_status(tmptrash, s, NULL, xferred, 0);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004745
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004746 ha_warning("%s.\n", tmptrash->area);
4747 send_log(s->proxy, LOG_NOTICE, "%s.\n",
4748 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004749 free_trash_chunk(tmptrash);
4750 tmptrash = NULL;
4751 }
4752
4753 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
4754 set_backend_down(s->proxy);
4755 }
4756 else if (((s->cur_state != SRV_ST_RUNNING) && (s->next_state == SRV_ST_RUNNING))
4757 || ((s->cur_state != SRV_ST_STARTING) && (s->next_state == SRV_ST_STARTING))) {
4758 if (s->proxy->srv_bck == 0 && s->proxy->srv_act == 0) {
4759 if (s->proxy->last_change < now.tv_sec) // ignore negative times
4760 s->proxy->down_time += now.tv_sec - s->proxy->last_change;
4761 s->proxy->last_change = now.tv_sec;
4762 }
4763
Amaury Denoyellefe2bf092020-10-29 15:59:04 +01004764 if (s->cur_state == SRV_ST_STOPPED && s->last_change < now.tv_sec) // ignore negative times
Emeric Brun64cc49c2017-10-03 14:46:45 +02004765 s->down_time += now.tv_sec - s->last_change;
4766
4767 s->last_change = now.tv_sec;
Willy Tarreau1e690bb2020-10-22 11:30:59 +02004768 if (s->next_state == SRV_ST_STARTING && s->warmup)
Emeric Brun64cc49c2017-10-03 14:46:45 +02004769 task_schedule(s->warmup, tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20))));
4770
Willy Tarreau3ff577e2018-08-02 11:48:52 +02004771 server_recalc_eweight(s, 0);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004772 /* now propagate the status change to any LB algorithms */
4773 if (px->lbprm.update_server_eweight)
4774 px->lbprm.update_server_eweight(s);
4775 else if (srv_willbe_usable(s)) {
4776 if (px->lbprm.set_server_status_up)
4777 px->lbprm.set_server_status_up(s);
4778 }
4779 else {
4780 if (px->lbprm.set_server_status_down)
4781 px->lbprm.set_server_status_down(s);
4782 }
4783
4784 /* If the server is set with "on-marked-up shutdown-backup-sessions",
4785 * and it's not a backup server and its effective weight is > 0,
4786 * then it can accept new connections, so we shut down all streams
4787 * on all backup servers.
4788 */
4789 if ((s->onmarkedup & HANA_ONMARKEDUP_SHUTDOWNBACKUPSESSIONS) &&
4790 !(s->flags & SRV_F_BACKUP) && s->next_eweight)
4791 srv_shutdown_backup_streams(s->proxy, SF_ERR_UP);
4792
4793 /* check if we can handle some connections queued at the proxy. We
4794 * will take as many as we can handle.
4795 */
4796 xferred = pendconn_grab_from_px(s);
4797
4798 tmptrash = alloc_trash_chunk();
4799 if (tmptrash) {
4800 chunk_printf(tmptrash,
4801 "%sServer %s/%s is UP", s->flags & SRV_F_BACKUP ? "Backup " : "",
4802 s->proxy->id, s->id);
4803
Emeric Brun5a133512017-10-19 14:42:30 +02004804 srv_append_status(tmptrash, s, NULL, xferred, 0);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004805 ha_warning("%s.\n", tmptrash->area);
4806 send_log(s->proxy, LOG_NOTICE, "%s.\n",
4807 tmptrash->area);
4808 send_email_alert(s, LOG_NOTICE, "%s",
4809 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004810 free_trash_chunk(tmptrash);
4811 tmptrash = NULL;
4812 }
4813
4814 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
4815 set_backend_down(s->proxy);
4816 }
4817 else if (s->cur_eweight != s->next_eweight) {
4818 /* now propagate the status change to any LB algorithms */
4819 if (px->lbprm.update_server_eweight)
4820 px->lbprm.update_server_eweight(s);
4821 else if (srv_willbe_usable(s)) {
4822 if (px->lbprm.set_server_status_up)
4823 px->lbprm.set_server_status_up(s);
4824 }
4825 else {
4826 if (px->lbprm.set_server_status_down)
4827 px->lbprm.set_server_status_down(s);
4828 }
4829
4830 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
4831 set_backend_down(s->proxy);
4832 }
4833
4834 s->next_admin = next_admin;
4835 }
4836
Emeric Brun5a133512017-10-19 14:42:30 +02004837 /* reset operational state change */
4838 *s->op_st_chg.reason = 0;
4839 s->op_st_chg.status = s->op_st_chg.code = -1;
4840 s->op_st_chg.duration = 0;
Emeric Brun64cc49c2017-10-03 14:46:45 +02004841
4842 /* Now we try to apply pending admin changes */
4843
4844 /* Maintenance must also disable health checks */
4845 if (!(s->cur_admin & SRV_ADMF_MAINT) && (s->next_admin & SRV_ADMF_MAINT)) {
4846 if (s->check.state & CHK_ST_ENABLED) {
4847 s->check.state |= CHK_ST_PAUSED;
4848 check->health = 0;
4849 }
4850
4851 if (s->cur_state == SRV_ST_STOPPED) { /* server was already down */
Olivier Houchard796a2b32017-10-24 17:42:47 +02004852 tmptrash = alloc_trash_chunk();
4853 if (tmptrash) {
4854 chunk_printf(tmptrash,
4855 "%sServer %s/%s was DOWN and now enters maintenance%s%s%s",
4856 s->flags & SRV_F_BACKUP ? "Backup " : "", s->proxy->id, s->id,
4857 *(s->adm_st_chg_cause) ? " (" : "", s->adm_st_chg_cause, *(s->adm_st_chg_cause) ? ")" : "");
Emeric Brun64cc49c2017-10-03 14:46:45 +02004858
Olivier Houchard796a2b32017-10-24 17:42:47 +02004859 srv_append_status(tmptrash, s, NULL, -1, (s->next_admin & SRV_ADMF_FMAINT));
Emeric Brun64cc49c2017-10-03 14:46:45 +02004860
Olivier Houchard796a2b32017-10-24 17:42:47 +02004861 if (!(global.mode & MODE_STARTING)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004862 ha_warning("%s.\n", tmptrash->area);
4863 send_log(s->proxy, LOG_NOTICE, "%s.\n",
4864 tmptrash->area);
Olivier Houchard796a2b32017-10-24 17:42:47 +02004865 }
4866 free_trash_chunk(tmptrash);
4867 tmptrash = NULL;
Emeric Brun64cc49c2017-10-03 14:46:45 +02004868 }
Emeric Brun8f298292017-12-06 16:47:17 +01004869 /* commit new admin status */
4870
4871 s->cur_admin = s->next_admin;
Emeric Brun64cc49c2017-10-03 14:46:45 +02004872 }
4873 else { /* server was still running */
4874 check->health = 0; /* failure */
4875 s->last_change = now.tv_sec;
Emeric Brune3114802017-12-21 14:42:26 +01004876
4877 s->next_state = SRV_ST_STOPPED;
Emeric Brun64cc49c2017-10-03 14:46:45 +02004878 if (s->proxy->lbprm.set_server_status_down)
4879 s->proxy->lbprm.set_server_status_down(s);
4880
Emeric Brun64cc49c2017-10-03 14:46:45 +02004881 if (s->onmarkeddown & HANA_ONMARKEDDOWN_SHUTDOWNSESSIONS)
4882 srv_shutdown_streams(s, SF_ERR_DOWN);
4883
William Dauchy6318d332020-05-02 21:52:36 +02004884 /* force connection cleanup on the given server */
4885 srv_cleanup_connections(s);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004886 /* we might have streams queued on this server and waiting for
4887 * a connection. Those which are redispatchable will be queued
4888 * to another server or to the proxy itself.
4889 */
4890 xferred = pendconn_redistribute(s);
4891
4892 tmptrash = alloc_trash_chunk();
4893 if (tmptrash) {
4894 chunk_printf(tmptrash,
4895 "%sServer %s/%s is going DOWN for maintenance%s%s%s",
4896 s->flags & SRV_F_BACKUP ? "Backup " : "",
4897 s->proxy->id, s->id,
4898 *(s->adm_st_chg_cause) ? " (" : "", s->adm_st_chg_cause, *(s->adm_st_chg_cause) ? ")" : "");
4899
4900 srv_append_status(tmptrash, s, NULL, xferred, (s->next_admin & SRV_ADMF_FMAINT));
4901
4902 if (!(global.mode & MODE_STARTING)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004903 ha_warning("%s.\n", tmptrash->area);
4904 send_log(s->proxy, srv_was_stopping ? LOG_NOTICE : LOG_ALERT, "%s.\n",
4905 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004906 }
4907 free_trash_chunk(tmptrash);
4908 tmptrash = NULL;
4909 }
4910 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
4911 set_backend_down(s->proxy);
4912
4913 s->counters.down_trans++;
4914 }
4915 }
4916 else if ((s->cur_admin & SRV_ADMF_MAINT) && !(s->next_admin & SRV_ADMF_MAINT)) {
4917 /* OK here we're leaving maintenance, we have many things to check,
4918 * because the server might possibly be coming back up depending on
4919 * its state. In practice, leaving maintenance means that we should
4920 * immediately turn to UP (more or less the slowstart) under the
4921 * following conditions :
4922 * - server is neither checked nor tracked
4923 * - server tracks another server which is not checked
4924 * - server tracks another server which is already up
4925 * Which sums up as something simpler :
4926 * "either the tracking server is up or the server's checks are disabled
4927 * or up". Otherwise we only re-enable health checks. There's a special
4928 * case associated to the stopping state which can be inherited. Note
4929 * that the server might still be in drain mode, which is naturally dealt
4930 * with by the lower level functions.
4931 */
4932
4933 if (s->check.state & CHK_ST_ENABLED) {
4934 s->check.state &= ~CHK_ST_PAUSED;
4935 check->health = check->rise; /* start OK but check immediately */
4936 }
4937
4938 if ((!s->track || s->track->next_state != SRV_ST_STOPPED) &&
4939 (!(s->agent.state & CHK_ST_ENABLED) || (s->agent.health >= s->agent.rise)) &&
4940 (!(s->check.state & CHK_ST_ENABLED) || (s->check.health >= s->check.rise))) {
4941 if (s->track && s->track->next_state == SRV_ST_STOPPING) {
4942 s->next_state = SRV_ST_STOPPING;
4943 }
4944 else {
4945 s->next_state = SRV_ST_STARTING;
Willy Tarreau1e690bb2020-10-22 11:30:59 +02004946 if (s->slowstart > 0) {
4947 if (s->warmup)
4948 task_schedule(s->warmup, tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20))));
4949 }
Emeric Brun64cc49c2017-10-03 14:46:45 +02004950 else
4951 s->next_state = SRV_ST_RUNNING;
4952 }
4953
4954 }
4955
4956 tmptrash = alloc_trash_chunk();
4957 if (tmptrash) {
4958 if (!(s->next_admin & SRV_ADMF_FMAINT) && (s->cur_admin & SRV_ADMF_FMAINT)) {
4959 chunk_printf(tmptrash,
4960 "%sServer %s/%s is %s/%s (leaving forced maintenance)",
4961 s->flags & SRV_F_BACKUP ? "Backup " : "",
4962 s->proxy->id, s->id,
4963 (s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP",
4964 (s->next_admin & SRV_ADMF_DRAIN) ? "DRAIN" : "READY");
4965 }
4966 if (!(s->next_admin & SRV_ADMF_RMAINT) && (s->cur_admin & SRV_ADMF_RMAINT)) {
4967 chunk_printf(tmptrash,
4968 "%sServer %s/%s ('%s') is %s/%s (resolves again)",
4969 s->flags & SRV_F_BACKUP ? "Backup " : "",
4970 s->proxy->id, s->id, s->hostname,
4971 (s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP",
4972 (s->next_admin & SRV_ADMF_DRAIN) ? "DRAIN" : "READY");
4973 }
4974 if (!(s->next_admin & SRV_ADMF_IMAINT) && (s->cur_admin & SRV_ADMF_IMAINT)) {
4975 chunk_printf(tmptrash,
4976 "%sServer %s/%s is %s/%s (leaving maintenance)",
4977 s->flags & SRV_F_BACKUP ? "Backup " : "",
4978 s->proxy->id, s->id,
4979 (s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP",
4980 (s->next_admin & SRV_ADMF_DRAIN) ? "DRAIN" : "READY");
4981 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004982 ha_warning("%s.\n", tmptrash->area);
4983 send_log(s->proxy, LOG_NOTICE, "%s.\n",
4984 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004985 free_trash_chunk(tmptrash);
4986 tmptrash = NULL;
4987 }
4988
Willy Tarreau3ff577e2018-08-02 11:48:52 +02004989 server_recalc_eweight(s, 0);
Emeric Brun64cc49c2017-10-03 14:46:45 +02004990 /* now propagate the status change to any LB algorithms */
4991 if (px->lbprm.update_server_eweight)
4992 px->lbprm.update_server_eweight(s);
4993 else if (srv_willbe_usable(s)) {
4994 if (px->lbprm.set_server_status_up)
4995 px->lbprm.set_server_status_up(s);
4996 }
4997 else {
4998 if (px->lbprm.set_server_status_down)
4999 px->lbprm.set_server_status_down(s);
5000 }
5001
5002 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
5003 set_backend_down(s->proxy);
5004
Willy Tarreau6a78e612018-08-07 10:14:53 +02005005 /* If the server is set with "on-marked-up shutdown-backup-sessions",
5006 * and it's not a backup server and its effective weight is > 0,
5007 * then it can accept new connections, so we shut down all streams
5008 * on all backup servers.
5009 */
5010 if ((s->onmarkedup & HANA_ONMARKEDUP_SHUTDOWNBACKUPSESSIONS) &&
5011 !(s->flags & SRV_F_BACKUP) && s->next_eweight)
5012 srv_shutdown_backup_streams(s->proxy, SF_ERR_UP);
5013
5014 /* check if we can handle some connections queued at the proxy. We
5015 * will take as many as we can handle.
5016 */
5017 xferred = pendconn_grab_from_px(s);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005018 }
5019 else if (s->next_admin & SRV_ADMF_MAINT) {
5020 /* remaining in maintenance mode, let's inform precisely about the
5021 * situation.
5022 */
5023 if (!(s->next_admin & SRV_ADMF_FMAINT) && (s->cur_admin & SRV_ADMF_FMAINT)) {
5024 tmptrash = alloc_trash_chunk();
5025 if (tmptrash) {
5026 chunk_printf(tmptrash,
5027 "%sServer %s/%s is leaving forced maintenance but remains in maintenance",
5028 s->flags & SRV_F_BACKUP ? "Backup " : "",
5029 s->proxy->id, s->id);
5030
5031 if (s->track) /* normally it's mandatory here */
5032 chunk_appendf(tmptrash, " via %s/%s",
5033 s->track->proxy->id, s->track->id);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005034 ha_warning("%s.\n", tmptrash->area);
5035 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5036 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005037 free_trash_chunk(tmptrash);
5038 tmptrash = NULL;
5039 }
5040 }
5041 if (!(s->next_admin & SRV_ADMF_RMAINT) && (s->cur_admin & SRV_ADMF_RMAINT)) {
5042 tmptrash = alloc_trash_chunk();
5043 if (tmptrash) {
5044 chunk_printf(tmptrash,
5045 "%sServer %s/%s ('%s') resolves again but remains in maintenance",
5046 s->flags & SRV_F_BACKUP ? "Backup " : "",
5047 s->proxy->id, s->id, s->hostname);
5048
5049 if (s->track) /* normally it's mandatory here */
5050 chunk_appendf(tmptrash, " via %s/%s",
5051 s->track->proxy->id, s->track->id);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005052 ha_warning("%s.\n", tmptrash->area);
5053 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5054 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005055 free_trash_chunk(tmptrash);
5056 tmptrash = NULL;
5057 }
5058 }
5059 else if (!(s->next_admin & SRV_ADMF_IMAINT) && (s->cur_admin & SRV_ADMF_IMAINT)) {
5060 tmptrash = alloc_trash_chunk();
5061 if (tmptrash) {
5062 chunk_printf(tmptrash,
5063 "%sServer %s/%s remains in forced maintenance",
5064 s->flags & SRV_F_BACKUP ? "Backup " : "",
5065 s->proxy->id, s->id);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005066 ha_warning("%s.\n", tmptrash->area);
5067 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5068 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005069 free_trash_chunk(tmptrash);
5070 tmptrash = NULL;
5071 }
5072 }
5073 /* don't report anything when leaving drain mode and remaining in maintenance */
5074
5075 s->cur_admin = s->next_admin;
5076 }
5077
5078 if (!(s->next_admin & SRV_ADMF_MAINT)) {
5079 if (!(s->cur_admin & SRV_ADMF_DRAIN) && (s->next_admin & SRV_ADMF_DRAIN)) {
5080 /* drain state is applied only if not yet in maint */
5081
5082 s->last_change = now.tv_sec;
5083 if (px->lbprm.set_server_status_down)
5084 px->lbprm.set_server_status_down(s);
5085
5086 /* we might have streams queued on this server and waiting for
5087 * a connection. Those which are redispatchable will be queued
5088 * to another server or to the proxy itself.
5089 */
5090 xferred = pendconn_redistribute(s);
5091
5092 tmptrash = alloc_trash_chunk();
5093 if (tmptrash) {
5094 chunk_printf(tmptrash, "%sServer %s/%s enters drain state%s%s%s",
5095 s->flags & SRV_F_BACKUP ? "Backup " : "", s->proxy->id, s->id,
5096 *(s->adm_st_chg_cause) ? " (" : "", s->adm_st_chg_cause, *(s->adm_st_chg_cause) ? ")" : "");
5097
5098 srv_append_status(tmptrash, s, NULL, xferred, (s->next_admin & SRV_ADMF_FDRAIN));
5099
5100 if (!(global.mode & MODE_STARTING)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005101 ha_warning("%s.\n", tmptrash->area);
5102 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5103 tmptrash->area);
5104 send_email_alert(s, LOG_NOTICE, "%s",
5105 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005106 }
5107 free_trash_chunk(tmptrash);
5108 tmptrash = NULL;
5109 }
5110
5111 if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
5112 set_backend_down(s->proxy);
5113 }
5114 else if ((s->cur_admin & SRV_ADMF_DRAIN) && !(s->next_admin & SRV_ADMF_DRAIN)) {
5115 /* OK completely leaving drain mode */
5116 if (s->proxy->srv_bck == 0 && s->proxy->srv_act == 0) {
5117 if (s->proxy->last_change < now.tv_sec) // ignore negative times
5118 s->proxy->down_time += now.tv_sec - s->proxy->last_change;
5119 s->proxy->last_change = now.tv_sec;
5120 }
5121
5122 if (s->last_change < now.tv_sec) // ignore negative times
5123 s->down_time += now.tv_sec - s->last_change;
5124 s->last_change = now.tv_sec;
Willy Tarreau3ff577e2018-08-02 11:48:52 +02005125 server_recalc_eweight(s, 0);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005126
5127 tmptrash = alloc_trash_chunk();
5128 if (tmptrash) {
5129 if (!(s->next_admin & SRV_ADMF_FDRAIN)) {
5130 chunk_printf(tmptrash,
5131 "%sServer %s/%s is %s (leaving forced drain)",
5132 s->flags & SRV_F_BACKUP ? "Backup " : "",
5133 s->proxy->id, s->id,
5134 (s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP");
5135 }
5136 else {
5137 chunk_printf(tmptrash,
5138 "%sServer %s/%s is %s (leaving drain)",
5139 s->flags & SRV_F_BACKUP ? "Backup " : "",
5140 s->proxy->id, s->id,
5141 (s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP");
5142 if (s->track) /* normally it's mandatory here */
5143 chunk_appendf(tmptrash, " via %s/%s",
5144 s->track->proxy->id, s->track->id);
5145 }
5146
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005147 ha_warning("%s.\n", tmptrash->area);
5148 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5149 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005150 free_trash_chunk(tmptrash);
5151 tmptrash = NULL;
5152 }
5153
5154 /* now propagate the status change to any LB algorithms */
5155 if (px->lbprm.update_server_eweight)
5156 px->lbprm.update_server_eweight(s);
5157 else if (srv_willbe_usable(s)) {
5158 if (px->lbprm.set_server_status_up)
5159 px->lbprm.set_server_status_up(s);
5160 }
5161 else {
5162 if (px->lbprm.set_server_status_down)
5163 px->lbprm.set_server_status_down(s);
5164 }
5165 }
5166 else if ((s->next_admin & SRV_ADMF_DRAIN)) {
5167 /* remaining in drain mode after removing one of its flags */
5168
5169 tmptrash = alloc_trash_chunk();
5170 if (tmptrash) {
5171 if (!(s->next_admin & SRV_ADMF_FDRAIN)) {
5172 chunk_printf(tmptrash,
5173 "%sServer %s/%s is leaving forced drain but remains in drain mode",
5174 s->flags & SRV_F_BACKUP ? "Backup " : "",
5175 s->proxy->id, s->id);
5176
5177 if (s->track) /* normally it's mandatory here */
5178 chunk_appendf(tmptrash, " via %s/%s",
5179 s->track->proxy->id, s->track->id);
5180 }
5181 else {
5182 chunk_printf(tmptrash,
5183 "%sServer %s/%s remains in forced drain mode",
5184 s->flags & SRV_F_BACKUP ? "Backup " : "",
5185 s->proxy->id, s->id);
5186 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02005187 ha_warning("%s.\n", tmptrash->area);
5188 send_log(s->proxy, LOG_NOTICE, "%s.\n",
5189 tmptrash->area);
Emeric Brun64cc49c2017-10-03 14:46:45 +02005190 free_trash_chunk(tmptrash);
5191 tmptrash = NULL;
5192 }
5193
5194 /* commit new admin status */
5195
5196 s->cur_admin = s->next_admin;
5197 }
5198 }
5199
5200 /* Re-set log strings to empty */
Emeric Brun64cc49c2017-10-03 14:46:45 +02005201 *s->adm_st_chg_cause = 0;
5202}
Emeric Brun64cc49c2017-10-03 14:46:45 +02005203
Willy Tarreau144f84a2021-03-02 16:09:26 +01005204struct task *srv_cleanup_toremove_conns(struct task *task, void *context, unsigned int state)
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005205{
5206 struct connection *conn;
5207
Willy Tarreau4d82bf52020-06-28 00:19:17 +02005208 while ((conn = MT_LIST_POP(&idle_conns[tid].toremove_conns,
Amaury Denoyellef232cb32021-01-06 16:14:12 +01005209 struct connection *, toremove_list)) != NULL) {
Christopher Faulet73c12072019-04-08 11:23:22 +02005210 conn->mux->destroy(conn->ctx);
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005211 }
5212
5213 return task;
5214}
5215
Amaury Denoyellef232cb32021-01-06 16:14:12 +01005216/* Move toremove_nb connections from idle_tree to toremove_list, -1 means
Olivier Houchardff1d0922020-06-29 20:15:59 +02005217 * moving them all.
5218 * Returns the number of connections moved.
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01005219 *
5220 * Must be called with idle_conns_lock held.
Olivier Houchardff1d0922020-06-29 20:15:59 +02005221 */
Amaury Denoyellef232cb32021-01-06 16:14:12 +01005222static int srv_migrate_conns_to_remove(struct eb_root *idle_tree, struct mt_list *toremove_list, int toremove_nb)
Olivier Houchardff1d0922020-06-29 20:15:59 +02005223{
Amaury Denoyellef232cb32021-01-06 16:14:12 +01005224 struct eb_node *node, *next;
Amaury Denoyelle8990b012021-02-19 15:29:16 +01005225 struct conn_hash_node *hash_node;
Olivier Houchardff1d0922020-06-29 20:15:59 +02005226 int i = 0;
5227
Amaury Denoyellef232cb32021-01-06 16:14:12 +01005228 node = eb_first(idle_tree);
5229 while (node) {
5230 next = eb_next(node);
Olivier Houchardff1d0922020-06-29 20:15:59 +02005231 if (toremove_nb != -1 && i >= toremove_nb)
5232 break;
Amaury Denoyellef232cb32021-01-06 16:14:12 +01005233
Amaury Denoyelle8990b012021-02-19 15:29:16 +01005234 hash_node = ebmb_entry(node, struct conn_hash_node, node);
Amaury Denoyellef232cb32021-01-06 16:14:12 +01005235 eb_delete(node);
Willy Tarreau2b718102021-04-21 07:32:39 +02005236 MT_LIST_APPEND(toremove_list, &hash_node->conn->toremove_list);
Olivier Houchardff1d0922020-06-29 20:15:59 +02005237 i++;
Amaury Denoyellef232cb32021-01-06 16:14:12 +01005238
5239 node = next;
Olivier Houchardff1d0922020-06-29 20:15:59 +02005240 }
5241 return i;
5242}
William Dauchy6318d332020-05-02 21:52:36 +02005243/* cleanup connections for a given server
5244 * might be useful when going on forced maintenance or live changing ip/port
5245 */
William Dauchy707ad322020-05-04 13:52:40 +02005246static void srv_cleanup_connections(struct server *srv)
William Dauchy6318d332020-05-02 21:52:36 +02005247{
William Dauchy6318d332020-05-02 21:52:36 +02005248 int did_remove;
5249 int i;
William Dauchy6318d332020-05-02 21:52:36 +02005250
Amaury Denoyelle10d5c312021-01-06 14:28:51 +01005251 /* nothing to do if pool-max-conn is null */
5252 if (!srv->max_idle_conns)
5253 return;
5254
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02005255 /* check all threads starting with ours */
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02005256 for (i = tid;;) {
William Dauchy6318d332020-05-02 21:52:36 +02005257 did_remove = 0;
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01005258 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[i].idle_conns_lock);
Willy Tarreau430bf4a2021-03-04 09:45:32 +01005259 if (srv_migrate_conns_to_remove(&srv->per_thr[i].idle_conns, &idle_conns[i].toremove_conns, -1) > 0)
William Dauchy6318d332020-05-02 21:52:36 +02005260 did_remove = 1;
Willy Tarreau430bf4a2021-03-04 09:45:32 +01005261 if (srv_migrate_conns_to_remove(&srv->per_thr[i].safe_conns, &idle_conns[i].toremove_conns, -1) > 0)
Olivier Houchardff1d0922020-06-29 20:15:59 +02005262 did_remove = 1;
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01005263 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[i].idle_conns_lock);
William Dauchy6318d332020-05-02 21:52:36 +02005264 if (did_remove)
Willy Tarreau4d82bf52020-06-28 00:19:17 +02005265 task_wakeup(idle_conns[i].cleanup_task, TASK_WOKEN_OTHER);
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02005266
5267 if ((i = ((i + 1 == global.nbthread) ? 0 : i + 1)) == tid)
5268 break;
William Dauchy6318d332020-05-02 21:52:36 +02005269 }
William Dauchy6318d332020-05-02 21:52:36 +02005270}
5271
Willy Tarreau144f84a2021-03-02 16:09:26 +01005272struct task *srv_cleanup_idle_conns(struct task *task, void *context, unsigned int state)
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01005273{
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005274 struct server *srv;
5275 struct eb32_node *eb;
5276 int i;
5277 unsigned int next_wakeup;
Olivier Houchardb7b3faa2018-12-14 18:15:36 +01005278
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005279 next_wakeup = TICK_ETERNITY;
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005280 HA_SPIN_LOCK(OTHER_LOCK, &idle_conn_srv_lock);
5281 while (1) {
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005282 int exceed_conns;
5283 int to_kill;
5284 int curr_idle;
Olivier Houchardb7b3faa2018-12-14 18:15:36 +01005285
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005286 eb = eb32_lookup_ge(&idle_conn_srv, now_ms - TIMER_LOOK_BACK);
5287 if (!eb) {
5288 /* we might have reached the end of the tree, typically because
5289 * <now_ms> is in the first half and we're first scanning the last
5290 * half. Let's loop back to the beginning of the tree now.
5291 */
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01005292
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005293 eb = eb32_first(&idle_conn_srv);
5294 if (likely(!eb))
5295 break;
5296 }
5297 if (tick_is_lt(now_ms, eb->key)) {
5298 /* timer not expired yet, revisit it later */
5299 next_wakeup = eb->key;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01005300 break;
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005301 }
5302 srv = eb32_entry(eb, struct server, idle_node);
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005303
5304 /* Calculate how many idle connections we want to kill :
5305 * we want to remove half the difference between the total
5306 * of established connections (used or idle) and the max
5307 * number of used connections.
5308 */
5309 curr_idle = srv->curr_idle_conns;
5310 if (curr_idle == 0)
5311 goto remove;
Willy Tarreaubdb86bd2020-06-29 15:56:35 +02005312 exceed_conns = srv->curr_used_conns + curr_idle - MAX(srv->max_used_conns, srv->est_need_conns);
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005313 exceed_conns = to_kill = exceed_conns / 2 + (exceed_conns & 1);
Willy Tarreaubdb86bd2020-06-29 15:56:35 +02005314
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005315 srv->est_need_conns = (srv->est_need_conns + srv->max_used_conns) / 2;
Willy Tarreaubdb86bd2020-06-29 15:56:35 +02005316 if (srv->est_need_conns < srv->max_used_conns)
5317 srv->est_need_conns = srv->max_used_conns;
5318
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005319 srv->max_used_conns = srv->curr_used_conns;
5320
Willy Tarreau18ed7892020-07-02 19:05:30 +02005321 if (exceed_conns <= 0)
5322 goto remove;
5323
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02005324 /* check all threads starting with ours */
5325 for (i = tid;;) {
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005326 int max_conn;
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005327 int j;
5328 int did_remove = 0;
5329
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005330 max_conn = (exceed_conns * srv->curr_idle_thr[i]) /
5331 curr_idle + 1;
Olivier Houchardff1d0922020-06-29 20:15:59 +02005332
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01005333 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[i].idle_conns_lock);
Willy Tarreau430bf4a2021-03-04 09:45:32 +01005334 j = srv_migrate_conns_to_remove(&srv->per_thr[i].idle_conns, &idle_conns[i].toremove_conns, max_conn);
Olivier Houchardff1d0922020-06-29 20:15:59 +02005335 if (j > 0)
5336 did_remove = 1;
5337 if (max_conn - j > 0 &&
Willy Tarreau430bf4a2021-03-04 09:45:32 +01005338 srv_migrate_conns_to_remove(&srv->per_thr[i].safe_conns, &idle_conns[i].toremove_conns, max_conn - j) > 0)
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005339 did_remove = 1;
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01005340 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[i].idle_conns_lock);
Olivier Houchardff1d0922020-06-29 20:15:59 +02005341
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005342 if (did_remove)
Willy Tarreau4d82bf52020-06-28 00:19:17 +02005343 task_wakeup(idle_conns[i].cleanup_task, TASK_WOKEN_OTHER);
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02005344
5345 if ((i = ((i + 1 == global.nbthread) ? 0 : i + 1)) == tid)
5346 break;
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005347 }
Olivier Houchard079cb9a2020-03-30 00:23:57 +02005348remove:
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005349 eb32_delete(&srv->idle_node);
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005350
5351 if (srv->curr_idle_conns) {
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005352 /* There are still more idle connections, add the
5353 * server back in the tree.
5354 */
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005355 srv->idle_node.key = tick_add(srv->pool_purge_delay, now_ms);
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005356 eb32_insert(&idle_conn_srv, &srv->idle_node);
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005357 next_wakeup = tick_first(next_wakeup, srv->idle_node.key);
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005358 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01005359 }
Olivier Houchard9ea5d362019-02-14 18:29:09 +01005360 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conn_srv_lock);
5361
Willy Tarreau21b9ff52020-11-05 09:12:20 +01005362 task->expire = next_wakeup;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01005363 return task;
5364}
Olivier Houchard88698d92019-04-16 19:07:22 +02005365
Amaury Denoyelle3109ccf2021-04-29 17:30:05 +02005366/* Close remaining idle connections. This functions is designed to be run on
5367 * process shutdown. This guarantees a proper socket shutdown to avoid
5368 * TIME_WAIT state. For a quick operation, only ctrl is closed, xprt stack is
5369 * bypassed.
5370 *
5371 * This function is not thread-safe so it must only be called via a global
5372 * deinit function.
5373 */
5374static void srv_close_idle_conns(struct server *srv)
5375{
5376 struct eb_root **cleaned_tree;
5377 int i;
5378
5379 for (i = 0; i < global.nbthread; ++i) {
5380 struct eb_root *conn_trees[] = {
5381 &srv->per_thr[i].idle_conns,
5382 &srv->per_thr[i].safe_conns,
5383 &srv->per_thr[i].avail_conns,
5384 NULL
5385 };
5386
5387 for (cleaned_tree = conn_trees; *cleaned_tree; ++cleaned_tree) {
5388 while (!eb_is_empty(*cleaned_tree)) {
5389 struct ebmb_node *node = ebmb_first(*cleaned_tree);
5390 struct conn_hash_node *conn_hash_node = ebmb_entry(node, struct conn_hash_node, node);
5391 struct connection *conn = conn_hash_node->conn;
5392
5393 if (conn->ctrl->ctrl_close)
5394 conn->ctrl->ctrl_close(conn);
5395 ebmb_delete(node);
5396 }
5397 }
5398 }
5399}
5400
5401REGISTER_SERVER_DEINIT(srv_close_idle_conns);
5402
Willy Tarreau76cc6992020-07-01 18:49:24 +02005403/* config parser for global "tune.idle-pool.shared", accepts "on" or "off" */
5404static int cfg_parse_idle_pool_shared(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01005405 const struct proxy *defpx, const char *file, int line,
Willy Tarreau76cc6992020-07-01 18:49:24 +02005406 char **err)
5407{
5408 if (too_many_args(1, args, err, NULL))
5409 return -1;
5410
5411 if (strcmp(args[1], "on") == 0)
5412 global.tune.options |= GTUNE_IDLE_POOL_SHARED;
5413 else if (strcmp(args[1], "off") == 0)
5414 global.tune.options &= ~GTUNE_IDLE_POOL_SHARED;
5415 else {
5416 memprintf(err, "'%s' expects either 'on' or 'off' but got '%s'.", args[0], args[1]);
5417 return -1;
5418 }
5419 return 0;
5420}
5421
Olivier Houchard88698d92019-04-16 19:07:22 +02005422/* config parser for global "tune.pool-{low,high}-fd-ratio" */
5423static int cfg_parse_pool_fd_ratio(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01005424 const struct proxy *defpx, const char *file, int line,
Olivier Houchard88698d92019-04-16 19:07:22 +02005425 char **err)
5426{
5427 int arg = -1;
5428
5429 if (too_many_args(1, args, err, NULL))
5430 return -1;
5431
5432 if (*(args[1]) != 0)
5433 arg = atoi(args[1]);
5434
5435 if (arg < 0 || arg > 100) {
5436 memprintf(err, "'%s' expects an integer argument between 0 and 100.", args[0]);
5437 return -1;
5438 }
5439
5440 if (args[0][10] == 'h')
5441 global.tune.pool_high_ratio = arg;
5442 else
5443 global.tune.pool_low_ratio = arg;
5444 return 0;
5445}
5446
5447/* config keyword parsers */
5448static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreau76cc6992020-07-01 18:49:24 +02005449 { CFG_GLOBAL, "tune.idle-pool.shared", cfg_parse_idle_pool_shared },
Olivier Houchard88698d92019-04-16 19:07:22 +02005450 { CFG_GLOBAL, "tune.pool-high-fd-ratio", cfg_parse_pool_fd_ratio },
5451 { CFG_GLOBAL, "tune.pool-low-fd-ratio", cfg_parse_pool_fd_ratio },
5452 { 0, NULL, NULL }
5453}};
5454
5455INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
5456
Baptiste Assmanna68ca962015-04-14 01:15:08 +02005457/*
Willy Tarreaubaaee002006-06-26 02:48:02 +02005458 * Local variables:
5459 * c-indent-level: 8
5460 * c-basic-offset: 8
5461 * End:
5462 */