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git01.mediatek.com / haproxy / ce94a948fbf6fb57f31eb8395566f916d89bf89c / . / src / server.c
blob: 50c6da131794b95e994ac4412922b9b0e625b284 [file] [log] [blame]
/*
* Server management functions.
*
* Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
* Copyright 2007-2008 Krzysztof Piotr Oledzki <ole@ans.pl>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <sys/types.h>
#include <netinet/tcp.h>
#include <ctype.h>
#include <errno.h>
#include <import/ebsttree.h>
#include <import/xxhash.h>
#include <haproxy/api.h>
#include <haproxy/applet-t.h>
#include <haproxy/backend.h>
#include <haproxy/cfgparse.h>
#include <haproxy/check.h>
#include <haproxy/cli.h>
#include <haproxy/connection.h>
#include <haproxy/dict-t.h>
#include <haproxy/dns.h>
#include <haproxy/errors.h>
#include <haproxy/global.h>
#include <haproxy/log.h>
#include <haproxy/mailers.h>
#include <haproxy/namespace.h>
#include <haproxy/port_range.h>
#include <haproxy/protocol.h>
#include <haproxy/queue.h>
#include <haproxy/sample.h>
#include <haproxy/server.h>
#include <haproxy/ssl_sock.h>
#include <haproxy/stats-t.h>
#include <haproxy/stream.h>
#include <haproxy/stream_interface.h>
#include <haproxy/task.h>
#include <haproxy/tcpcheck.h>
#include <haproxy/time.h>
static void srv_update_status(struct server *s);
static void srv_update_state(struct server *srv, int version, char **params);
static int srv_apply_lastaddr(struct server *srv, int *err_code);
static int srv_set_fqdn(struct server *srv, const char *fqdn, int dns_locked);
static void srv_state_parse_line(char *buf, const int version, char **params, char **srv_params);
static int srv_state_get_version(FILE *f);
static void srv_cleanup_connections(struct server *srv);
/* List head of all known server keywords */
static struct srv_kw_list srv_keywords = {
.list = LIST_HEAD_INIT(srv_keywords.list)
};
__decl_thread(HA_SPINLOCK_T idle_conn_srv_lock);
struct eb_root idle_conn_srv = EB_ROOT;
struct task *idle_conn_task = NULL;
/* The server names dictionary */
struct dict server_key_dict = {
.name = "server keys",
.values = EB_ROOT_UNIQUE,
};
/* tree where global state_file is loaded */
struct eb_root state_file = EB_ROOT_UNIQUE;
int srv_downtime(const struct server *s)
{
if ((s->cur_state != SRV_ST_STOPPED) || s->last_change >= now.tv_sec) // ignore negative time
return s->down_time;
return now.tv_sec - s->last_change + s->down_time;
}
int srv_lastsession(const struct server *s)
{
if (s->counters.last_sess)
return now.tv_sec - s->counters.last_sess;
return -1;
}
int srv_getinter(const struct check *check)
{
const struct server *s = check->server;
if ((check->state & CHK_ST_CONFIGURED) && (check->health == check->rise + check->fall - 1))
return check->inter;
if ((s->next_state == SRV_ST_STOPPED) && check->health == 0)
return (check->downinter)?(check->downinter):(check->inter);
return (check->fastinter)?(check->fastinter):(check->inter);
}
/*
* Check that we did not get a hash collision.
* Unlikely, but it can happen. The server's proxy must be at least
* read-locked.
*/
static inline void srv_check_for_dup_dyncookie(struct server *s)
{
struct proxy *p = s->proxy;
struct server *tmpserv;
for (tmpserv = p->srv; tmpserv != NULL;
tmpserv = tmpserv->next) {
if (tmpserv == s)
continue;
if (tmpserv->next_admin & SRV_ADMF_FMAINT)
continue;
if (tmpserv->cookie &&
strcmp(tmpserv->cookie, s->cookie) == 0) {
ha_warning("We generated two equal cookies for two different servers.\n"
"Please change the secret key for '%s'.\n",
s->proxy->id);
}
}
}
/*
* Must be called with the server lock held, and will read-lock the proxy.
*/
void srv_set_dyncookie(struct server *s)
{
struct proxy *p = s->proxy;
char *tmpbuf;
unsigned long long hash_value;
size_t key_len;
size_t buffer_len;
int addr_len;
int port;
HA_RWLOCK_RDLOCK(PROXY_LOCK, &p->lock);
if ((s->flags & SRV_F_COOKIESET) ||
!(s->proxy->ck_opts & PR_CK_DYNAMIC) ||
s->proxy->dyncookie_key == NULL)
goto out;
key_len = strlen(p->dyncookie_key);
if (s->addr.ss_family != AF_INET &&
s->addr.ss_family != AF_INET6)
goto out;
/*
* Buffer to calculate the cookie value.
* The buffer contains the secret key + the server IP address
* + the TCP port.
*/
addr_len = (s->addr.ss_family == AF_INET) ? 4 : 16;
/*
* The TCP port should use only 2 bytes, but is stored in
* an unsigned int in struct server, so let's use 4, to be
* on the safe side.
*/
buffer_len = key_len + addr_len + 4;
tmpbuf = trash.area;
memcpy(tmpbuf, p->dyncookie_key, key_len);
memcpy(&(tmpbuf[key_len]),
s->addr.ss_family == AF_INET ?
(void *)&((struct sockaddr_in *)&s->addr)->sin_addr.s_addr :
(void *)&(((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr),
addr_len);
/*
* Make sure it's the same across all the load balancers,
* no matter their endianness.
*/
port = htonl(s->svc_port);
memcpy(&tmpbuf[key_len + addr_len], &port, 4);
hash_value = XXH64(tmpbuf, buffer_len, 0);
memprintf(&s->cookie, "%016llx", hash_value);
if (!s->cookie)
goto out;
s->cklen = 16;
/* Don't bother checking if the dyncookie is duplicated if
* the server is marked as "disabled", maybe it doesn't have
* its real IP yet, but just a place holder.
*/
if (!(s->next_admin & SRV_ADMF_FMAINT))
srv_check_for_dup_dyncookie(s);
out:
HA_RWLOCK_RDUNLOCK(PROXY_LOCK, &p->lock);
}
/*
* Must be called with the server lock held, and will write-lock the proxy.
*/
static void srv_set_addr_desc(struct server *s)
{
struct proxy *p = s->proxy;
char *key;
key = sa2str(&s->addr, s->svc_port, s->flags & SRV_F_MAPPORTS);
if (s->addr_node.key) {
if (strcmp(key, s->addr_node.key) == 0) {
free(key);
return;
}
HA_RWLOCK_WRLOCK(PROXY_LOCK, &p->lock);
ebpt_delete(&s->addr_node);
HA_RWLOCK_WRUNLOCK(PROXY_LOCK, &p->lock);
free(s->addr_node.key);
}
s->addr_node.key = key;
HA_RWLOCK_WRLOCK(PROXY_LOCK, &p->lock);
ebis_insert(&p->used_server_addr, &s->addr_node);
HA_RWLOCK_WRUNLOCK(PROXY_LOCK, &p->lock);
}
/*
* Registers the server keyword list <kwl> as a list of valid keywords for next
* parsing sessions.
*/
void srv_register_keywords(struct srv_kw_list *kwl)
{
LIST_ADDQ(&srv_keywords.list, &kwl->list);
}
/* Return a pointer to the server keyword <kw>, or NULL if not found. If the
* keyword is found with a NULL ->parse() function, then an attempt is made to
* find one with a valid ->parse() function. This way it is possible to declare
* platform-dependant, known keywords as NULL, then only declare them as valid
* if some options are met. Note that if the requested keyword contains an
* opening parenthesis, everything from this point is ignored.
*/
struct srv_kw *srv_find_kw(const char *kw)
{
int index;
const char *kwend;
struct srv_kw_list *kwl;
struct srv_kw *ret = NULL;
kwend = strchr(kw, '(');
if (!kwend)
kwend = kw + strlen(kw);
list_for_each_entry(kwl, &srv_keywords.list, list) {
for (index = 0; kwl->kw[index].kw != NULL; index++) {
if ((strncmp(kwl->kw[index].kw, kw, kwend - kw) == 0) &&
kwl->kw[index].kw[kwend-kw] == 0) {
if (kwl->kw[index].parse)
return &kwl->kw[index]; /* found it !*/
else
ret = &kwl->kw[index]; /* may be OK */
}
}
}
return ret;
}
/* Dumps all registered "server" keywords to the <out> string pointer. The
* unsupported keywords are only dumped if their supported form was not
* found.
*/
void srv_dump_kws(char **out)
{
struct srv_kw_list *kwl;
int index;
if (!out)
return;
*out = NULL;
list_for_each_entry(kwl, &srv_keywords.list, list) {
for (index = 0; kwl->kw[index].kw != NULL; index++) {
if (kwl->kw[index].parse ||
srv_find_kw(kwl->kw[index].kw) == &kwl->kw[index]) {
memprintf(out, "%s[%4s] %s%s%s%s\n", *out ? *out : "",
kwl->scope,
kwl->kw[index].kw,
kwl->kw[index].skip ? " <arg>" : "",
kwl->kw[index].default_ok ? " [dflt_ok]" : "",
kwl->kw[index].parse ? "" : " (not supported)");
}
}
}
}
/* Parse the "backup" server keyword */
static int srv_parse_backup(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
newsrv->flags |= SRV_F_BACKUP;
return 0;
}
/* Parse the "cookie" server keyword */
static int srv_parse_cookie(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
char *arg;
arg = args[*cur_arg + 1];
if (!*arg) {
memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
free(newsrv->cookie);
newsrv->cookie = strdup(arg);
newsrv->cklen = strlen(arg);
newsrv->flags |= SRV_F_COOKIESET;
return 0;
}
/* Parse the "disabled" server keyword */
static int srv_parse_disabled(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
newsrv->next_admin |= SRV_ADMF_CMAINT | SRV_ADMF_FMAINT;
newsrv->next_state = SRV_ST_STOPPED;
newsrv->check.state |= CHK_ST_PAUSED;
newsrv->check.health = 0;
return 0;
}
/* Parse the "enabled" server keyword */
static int srv_parse_enabled(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
newsrv->next_admin &= ~SRV_ADMF_CMAINT & ~SRV_ADMF_FMAINT;
newsrv->next_state = SRV_ST_RUNNING;
newsrv->check.state &= ~CHK_ST_PAUSED;
newsrv->check.health = newsrv->check.rise;
return 0;
}
static int srv_parse_max_reuse(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
{
char *arg;
arg = args[*cur_arg + 1];
if (!*arg) {
memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
newsrv->max_reuse = atoi(arg);
return 0;
}
static int srv_parse_pool_purge_delay(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
{
const char *res;
char *arg;
unsigned int time;
arg = args[*cur_arg + 1];
if (!*arg) {
memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
res = parse_time_err(arg, &time, TIME_UNIT_MS);
if (res == PARSE_TIME_OVER) {
memprintf(err, "timer overflow in argument '%s' to '%s' (maximum value is 2147483647 ms or ~24.8 days)",
args[*cur_arg+1], args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
else if (res == PARSE_TIME_UNDER) {
memprintf(err, "timer underflow in argument '%s' to '%s' (minimum non-null value is 1 ms)",
args[*cur_arg+1], args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
else if (res) {
memprintf(err, "unexpected character '%c' in argument to <%s>.\n",
*res, args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
newsrv->pool_purge_delay = time;
return 0;
}
static int srv_parse_pool_low_conn(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
{
char *arg;
arg = args[*cur_arg + 1];
if (!*arg) {
memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
newsrv->low_idle_conns = atoi(arg);
return 0;
}
static int srv_parse_pool_max_conn(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
{
char *arg;
arg = args[*cur_arg + 1];
if (!*arg) {
memprintf(err, "'%s' expects <value> as argument.\n", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
newsrv->max_idle_conns = atoi(arg);
if ((int)newsrv->max_idle_conns < -1) {
memprintf(err, "'%s' must be >= -1", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
return 0;
}
/* parse the "id" server keyword */
static int srv_parse_id(char **args, int *cur_arg, struct proxy *curproxy, struct server *newsrv, char **err)
{
struct eb32_node *node;
if (!*args[*cur_arg + 1]) {
memprintf(err, "'%s' : expects an integer argument", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
newsrv->puid = atol(args[*cur_arg + 1]);
newsrv->conf.id.key = newsrv->puid;
if (newsrv->puid <= 0) {
memprintf(err, "'%s' : custom id has to be > 0", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
node = eb32_lookup(&curproxy->conf.used_server_id, newsrv->puid);
if (node) {
struct server *target = container_of(node, struct server, conf.id);
memprintf(err, "'%s' : custom id %d already used at %s:%d ('server %s')",
args[*cur_arg], newsrv->puid, target->conf.file, target->conf.line,
target->id);
return ERR_ALERT | ERR_FATAL;
}
eb32_insert(&curproxy->conf.used_server_id, &newsrv->conf.id);
newsrv->flags |= SRV_F_FORCED_ID;
return 0;
}
/* Parse the "namespace" server keyword */
static int srv_parse_namespace(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
#ifdef USE_NS
char *arg;
arg = args[*cur_arg + 1];
if (!*arg) {
memprintf(err, "'%s' : expects <name> as argument", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
if (strcmp(arg, "*") == 0) {
/* Use the namespace associated with the connection (if present). */
newsrv->flags |= SRV_F_USE_NS_FROM_PP;
return 0;
}
/*
* As this parser may be called several times for the same 'default-server'
* object, or for a new 'server' instance deriving from a 'default-server'
* one with SRV_F_USE_NS_FROM_PP flag enabled, let's reset it.
*/
newsrv->flags &= ~SRV_F_USE_NS_FROM_PP;
newsrv->netns = netns_store_lookup(arg, strlen(arg));
if (!newsrv->netns)
newsrv->netns = netns_store_insert(arg);
if (!newsrv->netns) {
memprintf(err, "Cannot open namespace '%s'", arg);
return ERR_ALERT | ERR_FATAL;
}
return 0;
#else
memprintf(err, "'%s': '%s' option not implemented", args[0], args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
#endif
}
/* Parse the "no-backup" server keyword */
static int srv_parse_no_backup(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
newsrv->flags &= ~SRV_F_BACKUP;
return 0;
}
/* Disable server PROXY protocol flags. */
static inline int srv_disable_pp_flags(struct server *srv, unsigned int flags)
{
srv->pp_opts &= ~flags;
return 0;
}
/* Parse the "no-send-proxy" server keyword */
static int srv_parse_no_send_proxy(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
return srv_disable_pp_flags(newsrv, SRV_PP_V1);
}
/* Parse the "no-send-proxy-v2" server keyword */
static int srv_parse_no_send_proxy_v2(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
return srv_disable_pp_flags(newsrv, SRV_PP_V2);
}
/* Parse the "no-tfo" server keyword */
static int srv_parse_no_tfo(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
newsrv->flags &= ~SRV_F_FASTOPEN;
return 0;
}
/* Parse the "non-stick" server keyword */
static int srv_parse_non_stick(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
newsrv->flags |= SRV_F_NON_STICK;
return 0;
}
/* Enable server PROXY protocol flags. */
static inline int srv_enable_pp_flags(struct server *srv, unsigned int flags)
{
srv->pp_opts |= flags;
return 0;
}
/* parse the "proto" server keyword */
static int srv_parse_proto(char **args, int *cur_arg,
struct proxy *px, struct server *newsrv, char **err)
{
struct ist proto;
if (!*args[*cur_arg + 1]) {
memprintf(err, "'%s' : missing value", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
proto = ist2(args[*cur_arg + 1], strlen(args[*cur_arg + 1]));
newsrv->mux_proto = get_mux_proto(proto);
if (!newsrv->mux_proto) {
memprintf(err, "'%s' : unknown MUX protocol '%s'", args[*cur_arg], args[*cur_arg+1]);
return ERR_ALERT | ERR_FATAL;
}
return 0;
}
/* parse the "proxy-v2-options" */
static int srv_parse_proxy_v2_options(char **args, int *cur_arg,
struct proxy *px, struct server *newsrv, char **err)
{
char *p, *n;
for (p = args[*cur_arg+1]; p; p = n) {
n = strchr(p, ',');
if (n)
*n++ = '\0';
if (strcmp(p, "ssl") == 0) {
newsrv->pp_opts |= SRV_PP_V2_SSL;
} else if (strcmp(p, "cert-cn") == 0) {
newsrv->pp_opts |= SRV_PP_V2_SSL;
newsrv->pp_opts |= SRV_PP_V2_SSL_CN;
} else if (strcmp(p, "cert-key") == 0) {
newsrv->pp_opts |= SRV_PP_V2_SSL;
newsrv->pp_opts |= SRV_PP_V2_SSL_KEY_ALG;
} else if (strcmp(p, "cert-sig") == 0) {
newsrv->pp_opts |= SRV_PP_V2_SSL;
newsrv->pp_opts |= SRV_PP_V2_SSL_SIG_ALG;
} else if (strcmp(p, "ssl-cipher") == 0) {
newsrv->pp_opts |= SRV_PP_V2_SSL;
newsrv->pp_opts |= SRV_PP_V2_SSL_CIPHER;
} else if (strcmp(p, "authority") == 0) {
newsrv->pp_opts |= SRV_PP_V2_AUTHORITY;
} else if (strcmp(p, "crc32c") == 0) {
newsrv->pp_opts |= SRV_PP_V2_CRC32C;
} else if (strcmp(p, "unique-id") == 0) {
newsrv->pp_opts |= SRV_PP_V2_UNIQUE_ID;
} else
goto fail;
}
return 0;
fail:
if (err)
memprintf(err, "'%s' : proxy v2 option not implemented", p);
return ERR_ALERT | ERR_FATAL;
}
/* Parse the "observe" server keyword */
static int srv_parse_observe(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
char *arg;
arg = args[*cur_arg + 1];
if (!*arg) {
memprintf(err, "'%s' expects <mode> as argument.\n", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
if (strcmp(arg, "none") == 0) {
newsrv->observe = HANA_OBS_NONE;
}
else if (strcmp(arg, "layer4") == 0) {
newsrv->observe = HANA_OBS_LAYER4;
}
else if (strcmp(arg, "layer7") == 0) {
if (curproxy->mode != PR_MODE_HTTP) {
memprintf(err, "'%s' can only be used in http proxies.\n", arg);
return ERR_ALERT;
}
newsrv->observe = HANA_OBS_LAYER7;
}
else {
memprintf(err, "'%s' expects one of 'none', 'layer4', 'layer7' "
"but got '%s'\n", args[*cur_arg], arg);
return ERR_ALERT | ERR_FATAL;
}
return 0;
}
/* Parse the "redir" server keyword */
static int srv_parse_redir(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
char *arg;
arg = args[*cur_arg + 1];
if (!*arg) {
memprintf(err, "'%s' expects <prefix> as argument.\n", args[*cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
free(newsrv->rdr_pfx);
newsrv->rdr_pfx = strdup(arg);
newsrv->rdr_len = strlen(arg);
return 0;
}
/* Parse the "send-proxy" server keyword */
static int srv_parse_send_proxy(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
return srv_enable_pp_flags(newsrv, SRV_PP_V1);
}
/* Parse the "send-proxy-v2" server keyword */
static int srv_parse_send_proxy_v2(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
return srv_enable_pp_flags(newsrv, SRV_PP_V2);
}
/* Parse the "source" server keyword */
static int srv_parse_source(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
char *errmsg;
int port_low, port_high;
struct sockaddr_storage *sk;
errmsg = NULL;
if (!*args[*cur_arg + 1]) {
memprintf(err, "'%s' expects <addr>[:<port>[-<port>]], and optionally '%s' <addr>, "
"and '%s' <name> as argument.\n", args[*cur_arg], "usesrc", "interface");
goto err;
}
/* 'sk' is statically allocated (no need to be freed). */
sk = str2sa_range(args[*cur_arg + 1], NULL, &port_low, &port_high, NULL, NULL,
&errmsg, NULL, NULL,
PA_O_RESOLVE | PA_O_PORT_OK | PA_O_PORT_RANGE | PA_O_STREAM | PA_O_CONNECT);
if (!sk) {
memprintf(err, "'%s %s' : %s\n", args[*cur_arg], args[*cur_arg + 1], errmsg);
goto err;
}
newsrv->conn_src.opts |= CO_SRC_BIND;
newsrv->conn_src.source_addr = *sk;
if (port_low != port_high) {
int i;
newsrv->conn_src.sport_range = port_range_alloc_range(port_high - port_low + 1);
for (i = 0; i < newsrv->conn_src.sport_range->size; i++)
newsrv->conn_src.sport_range->ports[i] = port_low + i;
}
*cur_arg += 2;
while (*(args[*cur_arg])) {
if (strcmp(args[*cur_arg], "usesrc") == 0) { /* address to use outside */
#if defined(CONFIG_HAP_TRANSPARENT)
if (!*args[*cur_arg + 1]) {
ha_alert("'usesrc' expects <addr>[:<port>], 'client', 'clientip', "
"or 'hdr_ip(name,#)' as argument.\n");
goto err;
}
if (strcmp(args[*cur_arg + 1], "client") == 0) {
newsrv->conn_src.opts &= ~CO_SRC_TPROXY_MASK;
newsrv->conn_src.opts |= CO_SRC_TPROXY_CLI;
}
else if (strcmp(args[*cur_arg + 1], "clientip") == 0) {
newsrv->conn_src.opts &= ~CO_SRC_TPROXY_MASK;
newsrv->conn_src.opts |= CO_SRC_TPROXY_CIP;
}
else if (!strncmp(args[*cur_arg + 1], "hdr_ip(", 7)) {
char *name, *end;
name = args[*cur_arg + 1] + 7;
while (isspace((unsigned char)*name))
name++;
end = name;
while (*end && !isspace((unsigned char)*end) && *end != ',' && *end != ')')
end++;
newsrv->conn_src.opts &= ~CO_SRC_TPROXY_MASK;
newsrv->conn_src.opts |= CO_SRC_TPROXY_DYN;
free(newsrv->conn_src.bind_hdr_name);
newsrv->conn_src.bind_hdr_name = calloc(1, end - name + 1);
newsrv->conn_src.bind_hdr_len = end - name;
memcpy(newsrv->conn_src.bind_hdr_name, name, end - name);
newsrv->conn_src.bind_hdr_name[end - name] = '\0';
newsrv->conn_src.bind_hdr_occ = -1;
/* now look for an occurrence number */
while (isspace((unsigned char)*end))
end++;
if (*end == ',') {
end++;
name = end;
if (*end == '-')
end++;
while (isdigit((unsigned char)*end))
end++;
newsrv->conn_src.bind_hdr_occ = strl2ic(name, end - name);
}
if (newsrv->conn_src.bind_hdr_occ < -MAX_HDR_HISTORY) {
ha_alert("usesrc hdr_ip(name,num) does not support negative"
" occurrences values smaller than %d.\n", MAX_HDR_HISTORY);
goto err;
}
}
else {
struct sockaddr_storage *sk;
int port1, port2;
/* 'sk' is statically allocated (no need to be freed). */
sk = str2sa_range(args[*cur_arg + 1], NULL, &port1, &port2, NULL, NULL,
&errmsg, NULL, NULL,
PA_O_RESOLVE | PA_O_PORT_OK | PA_O_STREAM | PA_O_CONNECT);
if (!sk) {
ha_alert("'%s %s' : %s\n", args[*cur_arg], args[*cur_arg + 1], errmsg);
goto err;
}
newsrv->conn_src.tproxy_addr = *sk;
newsrv->conn_src.opts |= CO_SRC_TPROXY_ADDR;
}
global.last_checks |= LSTCHK_NETADM;
*cur_arg += 2;
continue;
#else /* no TPROXY support */
ha_alert("'usesrc' not allowed here because support for TPROXY was not compiled in.\n");
goto err;
#endif /* defined(CONFIG_HAP_TRANSPARENT) */
} /* "usesrc" */
if (strcmp(args[*cur_arg], "interface") == 0) { /* specifically bind to this interface */
#ifdef SO_BINDTODEVICE
if (!*args[*cur_arg + 1]) {
ha_alert("'%s' : missing interface name.\n", args[0]);
goto err;
}
free(newsrv->conn_src.iface_name);
newsrv->conn_src.iface_name = strdup(args[*cur_arg + 1]);
newsrv->conn_src.iface_len = strlen(newsrv->conn_src.iface_name);
global.last_checks |= LSTCHK_NETADM;
#else
ha_alert("'%s' : '%s' option not implemented.\n", args[0], args[*cur_arg]);
goto err;
#endif
*cur_arg += 2;
continue;
}
/* this keyword in not an option of "source" */
break;
} /* while */
return 0;
err:
free(errmsg);
return ERR_ALERT | ERR_FATAL;
}
/* Parse the "stick" server keyword */
static int srv_parse_stick(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
newsrv->flags &= ~SRV_F_NON_STICK;
return 0;
}
/* Parse the "track" server keyword */
static int srv_parse_track(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
char *arg;
arg = args[*cur_arg + 1];
if (!*arg) {
memprintf(err, "'track' expects [<proxy>/]<server> as argument.\n");
return ERR_ALERT | ERR_FATAL;
}
free(newsrv->trackit);
newsrv->trackit = strdup(arg);
return 0;
}
/* Parse the "socks4" server keyword */
static int srv_parse_socks4(char **args, int *cur_arg,
struct proxy *curproxy, struct server *newsrv, char **err)
{
char *errmsg;
int port_low, port_high;
struct sockaddr_storage *sk;
errmsg = NULL;
if (!*args[*cur_arg + 1]) {
memprintf(err, "'%s' expects <addr>:<port> as argument.\n", args[*cur_arg]);
goto err;
}
/* 'sk' is statically allocated (no need to be freed). */
sk = str2sa_range(args[*cur_arg + 1], NULL, &port_low, &port_high, NULL, NULL,
&errmsg, NULL, NULL,
PA_O_RESOLVE | PA_O_PORT_OK | PA_O_PORT_MAND | PA_O_STREAM | PA_O_CONNECT);
if (!sk) {
memprintf(err, "'%s %s' : %s\n", args[*cur_arg], args[*cur_arg + 1], errmsg);
goto err;
}
newsrv->flags |= SRV_F_SOCKS4_PROXY;
newsrv->socks4_addr = *sk;
return 0;
err:
free(errmsg);
return ERR_ALERT | ERR_FATAL;
}
/* parse the "tfo" server keyword */
static int srv_parse_tfo(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
{
newsrv->flags |= SRV_F_FASTOPEN;
return 0;
}
/* Shutdown all connections of a server. The caller must pass a termination
* code in <why>, which must be one of SF_ERR_* indicating the reason for the
* shutdown.
*
* Must be called with the server lock held.
*/
void srv_shutdown_streams(struct server *srv, int why)
{
struct stream *stream, *stream_bck;
list_for_each_entry_safe(stream, stream_bck, &srv->actconns, by_srv)
if (stream->srv_conn == srv)
stream_shutdown(stream, why);
}
/* Shutdown all connections of all backup servers of a proxy. The caller must
* pass a termination code in <why>, which must be one of SF_ERR_* indicating
* the reason for the shutdown.
*
* Must be called with the server lock held.
*/
void srv_shutdown_backup_streams(struct proxy *px, int why)
{
struct server *srv;
for (srv = px->srv; srv != NULL; srv = srv->next)
if (srv->flags & SRV_F_BACKUP)
srv_shutdown_streams(srv, why);
}
/* Appends some information to a message string related to a server going UP or
* DOWN. If both <forced> and <reason> are null and the server tracks another
* one, a "via" information will be provided to know where the status came from.
* If <check> is non-null, an entire string describing the check result will be
* appended after a comma and a space (eg: to report some information from the
* check that changed the state). In the other case, the string will be built
* using the check results stored into the struct server if present.
* If <xferred> is non-negative, some information about requeued sessions are
* provided.
*
* Must be called with the server lock held.
*/
void srv_append_status(struct buffer *msg, struct server *s,
struct check *check, int xferred, int forced)
{
short status = s->op_st_chg.status;
short code = s->op_st_chg.code;
long duration = s->op_st_chg.duration;
char *desc = s->op_st_chg.reason;
if (check) {
status = check->status;
code = check->code;
duration = check->duration;
desc = check->desc;
}
if (status != -1) {
chunk_appendf(msg, ", reason: %s", get_check_status_description(status));
if (status >= HCHK_STATUS_L57DATA)
chunk_appendf(msg, ", code: %d", code);
if (desc && *desc) {
struct buffer src;
chunk_appendf(msg, ", info: \"");
chunk_initlen(&src, desc, 0, strlen(desc));
chunk_asciiencode(msg, &src, '"');
chunk_appendf(msg, "\"");
}
if (duration >= 0)
chunk_appendf(msg, ", check duration: %ldms", duration);
}
else if (desc && *desc) {
chunk_appendf(msg, ", %s", desc);
}
else if (!forced && s->track) {
chunk_appendf(msg, " via %s/%s", s->track->proxy->id, s->track->id);
}
if (xferred >= 0) {
if (s->next_state == SRV_ST_STOPPED)
chunk_appendf(msg, ". %d active and %d backup servers left.%s"
" %d sessions active, %d requeued, %d remaining in queue",
s->proxy->srv_act, s->proxy->srv_bck,
(s->proxy->srv_bck && !s->proxy->srv_act) ? " Running on backup." : "",
s->cur_sess, xferred, s->nbpend);
else
chunk_appendf(msg, ". %d active and %d backup servers online.%s"
" %d sessions requeued, %d total in queue",
s->proxy->srv_act, s->proxy->srv_bck,
(s->proxy->srv_bck && !s->proxy->srv_act) ? " Running on backup." : "",
xferred, s->nbpend);
}
}
/* Marks server <s> down, regardless of its checks' statuses. The server is
* registered in a list to postpone the counting of the remaining servers on
* the proxy and transfers queued streams whenever possible to other servers at
* a sync point. Maintenance servers are ignored. It stores the <reason> if
* non-null as the reason for going down or the available data from the check
* struct to recompute this reason later.
*
* Must be called with the server lock held.
*/
void srv_set_stopped(struct server *s, const char *reason, struct check *check)
{
struct server *srv;
if ((s->cur_admin & SRV_ADMF_MAINT) || s->next_state == SRV_ST_STOPPED)
return;
s->next_state = SRV_ST_STOPPED;
*s->op_st_chg.reason = 0;
s->op_st_chg.status = -1;
if (reason) {
strlcpy2(s->op_st_chg.reason, reason, sizeof(s->op_st_chg.reason));
}
else if (check) {
strlcpy2(s->op_st_chg.reason, check->desc, sizeof(s->op_st_chg.reason));
s->op_st_chg.code = check->code;
s->op_st_chg.status = check->status;
s->op_st_chg.duration = check->duration;
}
/* propagate changes */
srv_update_status(s);
for (srv = s->trackers; srv; srv = srv->tracknext) {
HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
srv_set_stopped(srv, NULL, NULL);
HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
}
}
/* Marks server <s> up regardless of its checks' statuses and provided it isn't
* in maintenance. The server is registered in a list to postpone the counting
* of the remaining servers on the proxy and tries to grab requests from the
* proxy at a sync point. Maintenance servers are ignored. It stores the
* <reason> if non-null as the reason for going down or the available data
* from the check struct to recompute this reason later.
*
* Must be called with the server lock held.
*/
void srv_set_running(struct server *s, const char *reason, struct check *check)
{
struct server *srv;
if (s->cur_admin & SRV_ADMF_MAINT)
return;
if (s->next_state == SRV_ST_STARTING || s->next_state == SRV_ST_RUNNING)
return;
s->next_state = SRV_ST_STARTING;
*s->op_st_chg.reason = 0;
s->op_st_chg.status = -1;
if (reason) {
strlcpy2(s->op_st_chg.reason, reason, sizeof(s->op_st_chg.reason));
}
else if (check) {
strlcpy2(s->op_st_chg.reason, check->desc, sizeof(s->op_st_chg.reason));
s->op_st_chg.code = check->code;
s->op_st_chg.status = check->status;
s->op_st_chg.duration = check->duration;
}
if (s->slowstart <= 0)
s->next_state = SRV_ST_RUNNING;
/* propagate changes */
srv_update_status(s);
for (srv = s->trackers; srv; srv = srv->tracknext) {
HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
srv_set_running(srv, NULL, NULL);
HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
}
}
/* Marks server <s> stopping regardless of its checks' statuses and provided it
* isn't in maintenance. The server is registered in a list to postpone the
* counting of the remaining servers on the proxy and tries to grab requests
* from the proxy. Maintenance servers are ignored. It stores the
* <reason> if non-null as the reason for going down or the available data
* from the check struct to recompute this reason later.
* up. Note that it makes use of the trash to build the log strings, so <reason>
* must not be placed there.
*
* Must be called with the server lock held.
*/
void srv_set_stopping(struct server *s, const char *reason, struct check *check)
{
struct server *srv;
if (s->cur_admin & SRV_ADMF_MAINT)
return;
if (s->next_state == SRV_ST_STOPPING)
return;
s->next_state = SRV_ST_STOPPING;
*s->op_st_chg.reason = 0;
s->op_st_chg.status = -1;
if (reason) {
strlcpy2(s->op_st_chg.reason, reason, sizeof(s->op_st_chg.reason));
}
else if (check) {
strlcpy2(s->op_st_chg.reason, check->desc, sizeof(s->op_st_chg.reason));
s->op_st_chg.code = check->code;
s->op_st_chg.status = check->status;
s->op_st_chg.duration = check->duration;
}
/* propagate changes */
srv_update_status(s);
for (srv = s->trackers; srv; srv = srv->tracknext) {
HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
srv_set_stopping(srv, NULL, NULL);
HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
}
}
/* Enables admin flag <mode> (among SRV_ADMF_*) on server <s>. This is used to
* enforce either maint mode or drain mode. It is not allowed to set more than
* one flag at once. The equivalent "inherited" flag is propagated to all
* tracking servers. Maintenance mode disables health checks (but not agent
* checks). When either the flag is already set or no flag is passed, nothing
* is done. If <cause> is non-null, it will be displayed at the end of the log
* lines to justify the state change.
*
* Must be called with the server lock held.
*/
void srv_set_admin_flag(struct server *s, enum srv_admin mode, const char *cause)
{
struct server *srv;
if (!mode)
return;
/* stop going down as soon as we meet a server already in the same state */
if (s->next_admin & mode)
return;
s->next_admin |= mode;
if (cause)
strlcpy2(s->adm_st_chg_cause, cause, sizeof(s->adm_st_chg_cause));
/* propagate changes */
srv_update_status(s);
/* stop going down if the equivalent flag was already present (forced or inherited) */
if (((mode & SRV_ADMF_MAINT) && (s->next_admin & ~mode & SRV_ADMF_MAINT)) ||
((mode & SRV_ADMF_DRAIN) && (s->next_admin & ~mode & SRV_ADMF_DRAIN)))
return;
/* compute the inherited flag to propagate */
if (mode & SRV_ADMF_MAINT)
mode = SRV_ADMF_IMAINT;
else if (mode & SRV_ADMF_DRAIN)
mode = SRV_ADMF_IDRAIN;
for (srv = s->trackers; srv; srv = srv->tracknext) {
HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
srv_set_admin_flag(srv, mode, cause);
HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
}
}
/* Disables admin flag <mode> (among SRV_ADMF_*) on server <s>. This is used to
* stop enforcing either maint mode or drain mode. It is not allowed to set more
* than one flag at once. The equivalent "inherited" flag is propagated to all
* tracking servers. Leaving maintenance mode re-enables health checks. When
* either the flag is already cleared or no flag is passed, nothing is done.
*
* Must be called with the server lock held.
*/
void srv_clr_admin_flag(struct server *s, enum srv_admin mode)
{
struct server *srv;
if (!mode)
return;
/* stop going down as soon as we see the flag is not there anymore */
if (!(s->next_admin & mode))
return;
s->next_admin &= ~mode;
/* propagate changes */
srv_update_status(s);
/* stop going down if the equivalent flag is still present (forced or inherited) */
if (((mode & SRV_ADMF_MAINT) && (s->next_admin & SRV_ADMF_MAINT)) ||
((mode & SRV_ADMF_DRAIN) && (s->next_admin & SRV_ADMF_DRAIN)))
return;
if (mode & SRV_ADMF_MAINT)
mode = SRV_ADMF_IMAINT;
else if (mode & SRV_ADMF_DRAIN)
mode = SRV_ADMF_IDRAIN;
for (srv = s->trackers; srv; srv = srv->tracknext) {
HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
srv_clr_admin_flag(srv, mode);
HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
}
}
/* principle: propagate maint and drain to tracking servers. This is useful
* upon startup so that inherited states are correct.
*/
static void srv_propagate_admin_state(struct server *srv)
{
struct server *srv2;
if (!srv->trackers)
return;
for (srv2 = srv->trackers; srv2; srv2 = srv2->tracknext) {
HA_SPIN_LOCK(SERVER_LOCK, &srv2->lock);
if (srv->next_admin & (SRV_ADMF_MAINT | SRV_ADMF_CMAINT))
srv_set_admin_flag(srv2, SRV_ADMF_IMAINT, NULL);
if (srv->next_admin & SRV_ADMF_DRAIN)
srv_set_admin_flag(srv2, SRV_ADMF_IDRAIN, NULL);
HA_SPIN_UNLOCK(SERVER_LOCK, &srv2->lock);
}
}
/* Compute and propagate the admin states for all servers in proxy <px>.
* Only servers *not* tracking another one are considered, because other
* ones will be handled when the server they track is visited.
*/
void srv_compute_all_admin_states(struct proxy *px)
{
struct server *srv;
for (srv = px->srv; srv; srv = srv->next) {
if (srv->track)
continue;
srv_propagate_admin_state(srv);
}
}
/* Note: must not be declared <const> as its list will be overwritten.
* Please take care of keeping this list alphabetically sorted, doing so helps
* all code contributors.
* Optional keywords are also declared with a NULL ->parse() function so that
* the config parser can report an appropriate error when a known keyword was
* not enabled.
* Note: -1 as ->skip value means that the number of arguments are variable.
*/
static struct srv_kw_list srv_kws = { "ALL", { }, {
{ "backup", srv_parse_backup, 0, 1 }, /* Flag as backup server */
{ "cookie", srv_parse_cookie, 1, 1 }, /* Assign a cookie to the server */
{ "disabled", srv_parse_disabled, 0, 1 }, /* Start the server in 'disabled' state */
{ "enabled", srv_parse_enabled, 0, 1 }, /* Start the server in 'enabled' state */
{ "id", srv_parse_id, 1, 0 }, /* set id# of server */
{ "max-reuse", srv_parse_max_reuse, 1, 1 }, /* Set the max number of requests on a connection, -1 means unlimited */
{ "namespace", srv_parse_namespace, 1, 1 }, /* Namespace the server socket belongs to (if supported) */
{ "no-backup", srv_parse_no_backup, 0, 1 }, /* Flag as non-backup server */
{ "no-send-proxy", srv_parse_no_send_proxy, 0, 1 }, /* Disable use of PROXY V1 protocol */
{ "no-send-proxy-v2", srv_parse_no_send_proxy_v2, 0, 1 }, /* Disable use of PROXY V2 protocol */
{ "no-tfo", srv_parse_no_tfo, 0, 1 }, /* Disable use of TCP Fast Open */
{ "non-stick", srv_parse_non_stick, 0, 1 }, /* Disable stick-table persistence */
{ "observe", srv_parse_observe, 1, 1 }, /* Enables health adjusting based on observing communication with the server */
{ "pool-low-conn", srv_parse_pool_low_conn, 1, 1 }, /* Set the min number of orphan idle connecbefore being allowed to pick from other threads */
{ "pool-max-conn", srv_parse_pool_max_conn, 1, 1 }, /* Set the max number of orphan idle connections, 0 means unlimited */
{ "pool-purge-delay", srv_parse_pool_purge_delay, 1, 1 }, /* Set the time before we destroy orphan idle connections, defaults to 1s */
{ "proto", srv_parse_proto, 1, 1 }, /* Set the proto to use for all outgoing connections */
{ "proxy-v2-options", srv_parse_proxy_v2_options, 1, 1 }, /* options for send-proxy-v2 */
{ "redir", srv_parse_redir, 1, 1 }, /* Enable redirection mode */
{ "send-proxy", srv_parse_send_proxy, 0, 1 }, /* Enforce use of PROXY V1 protocol */
{ "send-proxy-v2", srv_parse_send_proxy_v2, 0, 1 }, /* Enforce use of PROXY V2 protocol */
{ "source", srv_parse_source, -1, 1 }, /* Set the source address to be used to connect to the server */
{ "stick", srv_parse_stick, 0, 1 }, /* Enable stick-table persistence */
{ "tfo", srv_parse_tfo, 0, 1 }, /* enable TCP Fast Open of server */
{ "track", srv_parse_track, 1, 1 }, /* Set the current state of the server, tracking another one */
{ "socks4", srv_parse_socks4, 1, 1 }, /* Set the socks4 proxy of the server*/
{ NULL, NULL, 0 },
}};
INITCALL1(STG_REGISTER, srv_register_keywords, &srv_kws);
/* Recomputes the server's eweight based on its state, uweight, the current time,
* and the proxy's algorithm. To be used after updating sv->uweight. The warmup
* state is automatically disabled if the time is elapsed. If <must_update> is
* not zero, the update will be propagated immediately.
*
* Must be called with the server lock held.
*/
void server_recalc_eweight(struct server *sv, int must_update)
{
struct proxy *px = sv->proxy;
unsigned w;
if (now.tv_sec < sv->last_change || now.tv_sec >= sv->last_change + sv->slowstart) {
/* go to full throttle if the slowstart interval is reached */
if (sv->next_state == SRV_ST_STARTING)
sv->next_state = SRV_ST_RUNNING;
}
/* We must take care of not pushing the server to full throttle during slow starts.
* It must also start immediately, at least at the minimal step when leaving maintenance.
*/
if ((sv->next_state == SRV_ST_STARTING) && (px->lbprm.algo & BE_LB_PROP_DYN))
w = (px->lbprm.wdiv * (now.tv_sec - sv->last_change) + sv->slowstart) / sv->slowstart;
else
w = px->lbprm.wdiv;
sv->next_eweight = (sv->uweight * w + px->lbprm.wmult - 1) / px->lbprm.wmult;
/* propagate changes only if needed (i.e. not recursively) */
if (must_update)
srv_update_status(sv);
}
/*
* Parses weight_str and configures sv accordingly.
* Returns NULL on success, error message string otherwise.
*
* Must be called with the server lock held.
*/
const char *server_parse_weight_change_request(struct server *sv,
const char *weight_str)
{
struct proxy *px;
long int w;
char *end;
px = sv->proxy;
/* if the weight is terminated with '%', it is set relative to
* the initial weight, otherwise it is absolute.
*/
if (!*weight_str)
return "Require <weight> or <weight%>.\n";
w = strtol(weight_str, &end, 10);
if (end == weight_str)
return "Empty weight string empty or preceded by garbage";
else if (end[0] == '%' && end[1] == '\0') {
if (w < 0)
return "Relative weight must be positive.\n";
/* Avoid integer overflow */
if (w > 25600)
w = 25600;
w = sv->iweight * w / 100;
if (w > 256)
w = 256;
}
else if (w < 0 || w > 256)
return "Absolute weight can only be between 0 and 256 inclusive.\n";
else if (end[0] != '\0')
return "Trailing garbage in weight string";
if (w && w != sv->iweight && !(px->lbprm.algo & BE_LB_PROP_DYN))
return "Backend is using a static LB algorithm and only accepts weights '0%' and '100%'.\n";
sv->uweight = w;
server_recalc_eweight(sv, 1);
return NULL;
}
/*
* Parses <addr_str> and configures <sv> accordingly. <from> precise
* the source of the change in the associated message log.
* Returns:
* - error string on error
* - NULL on success
*
* Must be called with the server lock held.
*/
const char *server_parse_addr_change_request(struct server *sv,
const char *addr_str, const char *updater)
{
unsigned char ip[INET6_ADDRSTRLEN];
if (inet_pton(AF_INET6, addr_str, ip)) {
update_server_addr(sv, ip, AF_INET6, updater);
return NULL;
}
if (inet_pton(AF_INET, addr_str, ip)) {
update_server_addr(sv, ip, AF_INET, updater);
return NULL;
}
return "Could not understand IP address format.\n";
}
/*
* Must be called with the server lock held.
*/
const char *server_parse_maxconn_change_request(struct server *sv,
const char *maxconn_str)
{
long int v;
char *end;
if (!*maxconn_str)
return "Require <maxconn>.\n";
v = strtol(maxconn_str, &end, 10);
if (end == maxconn_str)
return "maxconn string empty or preceded by garbage";
else if (end[0] != '\0')
return "Trailing garbage in maxconn string";
if (sv->maxconn == sv->minconn) { // static maxconn
sv->maxconn = sv->minconn = v;
} else { // dynamic maxconn
sv->maxconn = v;
}
if (may_dequeue_tasks(sv, sv->proxy))
process_srv_queue(sv);
return NULL;
}
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
static struct sample_expr *srv_sni_sample_parse_expr(struct server *srv, struct proxy *px,
const char *file, int linenum, char **err)
{
int idx;
const char *args[] = {
srv->sni_expr,
NULL,
};
idx = 0;
px->conf.args.ctx = ARGC_SRV;
return sample_parse_expr((char **)args, &idx, file, linenum, err, &px->conf.args, NULL);
}
static int server_parse_sni_expr(struct server *newsrv, struct proxy *px, char **err)
{
struct sample_expr *expr;
expr = srv_sni_sample_parse_expr(newsrv, px, px->conf.file, px->conf.line, err);
if (!expr) {
memprintf(err, "error detected while parsing sni expression : %s", *err);
return ERR_ALERT | ERR_FATAL;
}
if (!(expr->fetch->val & SMP_VAL_BE_SRV_CON)) {
memprintf(err, "error detected while parsing sni expression : "
" fetch method '%s' extracts information from '%s', "
"none of which is available here.\n",
newsrv->sni_expr, sample_src_names(expr->fetch->use));
return ERR_ALERT | ERR_FATAL;
}
px->http_needed |= !!(expr->fetch->use & SMP_USE_HTTP_ANY);
release_sample_expr(newsrv->ssl_ctx.sni);
newsrv->ssl_ctx.sni = expr;
return 0;
}
#endif
static void display_parser_err(const char *file, int linenum, char **args, int cur_arg, int err_code, char **err)
{
char *msg = "error encountered while processing ";
char *quote = "'";
char *token = args[cur_arg];
if (err && *err) {
indent_msg(err, 2);
msg = *err;
quote = "";
token = "";
}
if (err_code & ERR_WARN && !(err_code & ERR_ALERT))
ha_warning("parsing [%s:%d] : '%s %s' : %s%s%s%s.\n",
file, linenum, args[0], args[1],
msg, quote, token, quote);
else
ha_alert("parsing [%s:%d] : '%s %s' : %s%s%s%s.\n",
file, linenum, args[0], args[1],
msg, quote, token, quote);
}
static void srv_conn_src_sport_range_cpy(struct server *srv,
struct server *src)
{
int range_sz;
range_sz = src->conn_src.sport_range->size;
if (range_sz > 0) {
srv->conn_src.sport_range = port_range_alloc_range(range_sz);
if (srv->conn_src.sport_range != NULL) {
int i;
for (i = 0; i < range_sz; i++) {
srv->conn_src.sport_range->ports[i] =
src->conn_src.sport_range->ports[i];
}
}
}
}
/*
* Copy <src> server connection source settings to <srv> server everything needed.
*/
static void srv_conn_src_cpy(struct server *srv, struct server *src)
{
srv->conn_src.opts = src->conn_src.opts;
srv->conn_src.source_addr = src->conn_src.source_addr;
/* Source port range copy. */
if (src->conn_src.sport_range != NULL)
srv_conn_src_sport_range_cpy(srv, src);
#ifdef CONFIG_HAP_TRANSPARENT
if (src->conn_src.bind_hdr_name != NULL) {
srv->conn_src.bind_hdr_name = strdup(src->conn_src.bind_hdr_name);
srv->conn_src.bind_hdr_len = strlen(src->conn_src.bind_hdr_name);
}
srv->conn_src.bind_hdr_occ = src->conn_src.bind_hdr_occ;
srv->conn_src.tproxy_addr = src->conn_src.tproxy_addr;
#endif
if (src->conn_src.iface_name != NULL)
srv->conn_src.iface_name = strdup(src->conn_src.iface_name);
}
/*
* Copy <src> server SSL settings to <srv> server allocating
* everything needed.
*/
#if defined(USE_OPENSSL)
static void srv_ssl_settings_cpy(struct server *srv, struct server *src)
{
if (src->ssl_ctx.ca_file != NULL)
srv->ssl_ctx.ca_file = strdup(src->ssl_ctx.ca_file);
if (src->ssl_ctx.crl_file != NULL)
srv->ssl_ctx.crl_file = strdup(src->ssl_ctx.crl_file);
if (src->ssl_ctx.client_crt != NULL)
srv->ssl_ctx.client_crt = strdup(src->ssl_ctx.client_crt);
srv->ssl_ctx.verify = src->ssl_ctx.verify;
if (src->ssl_ctx.verify_host != NULL)
srv->ssl_ctx.verify_host = strdup(src->ssl_ctx.verify_host);
if (src->ssl_ctx.ciphers != NULL)
srv->ssl_ctx.ciphers = strdup(src->ssl_ctx.ciphers);
if (src->ssl_ctx.options)
srv->ssl_ctx.options = src->ssl_ctx.options;
if (src->ssl_ctx.methods.flags)
srv->ssl_ctx.methods.flags = src->ssl_ctx.methods.flags;
if (src->ssl_ctx.methods.min)
srv->ssl_ctx.methods.min = src->ssl_ctx.methods.min;
if (src->ssl_ctx.methods.max)
srv->ssl_ctx.methods.max = src->ssl_ctx.methods.max;
#if (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L && !defined OPENSSL_IS_BORINGSSL)
if (src->ssl_ctx.ciphersuites != NULL)
srv->ssl_ctx.ciphersuites = strdup(src->ssl_ctx.ciphersuites);
#endif
if (src->sni_expr != NULL)
srv->sni_expr = strdup(src->sni_expr);
#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
if (src->ssl_ctx.alpn_str) {
srv->ssl_ctx.alpn_str = malloc(src->ssl_ctx.alpn_len);
if (srv->ssl_ctx.alpn_str) {
memcpy(srv->ssl_ctx.alpn_str, src->ssl_ctx.alpn_str,
src->ssl_ctx.alpn_len);
srv->ssl_ctx.alpn_len = src->ssl_ctx.alpn_len;
}
}
#endif
#ifdef OPENSSL_NPN_NEGOTIATED
if (src->ssl_ctx.npn_str) {
srv->ssl_ctx.npn_str = malloc(src->ssl_ctx.npn_len);
if (srv->ssl_ctx.npn_str) {
memcpy(srv->ssl_ctx.npn_str, src->ssl_ctx.npn_str,
src->ssl_ctx.npn_len);
srv->ssl_ctx.npn_len = src->ssl_ctx.npn_len;
}
}
#endif
}
#endif
/*
* Prepare <srv> for hostname resolution.
* May be safely called with a default server as <src> argument (without hostname).
* Returns -1 in case of any allocation failure, 0 if not.
*/
static int srv_prepare_for_resolution(struct server *srv, const char *hostname)
{
char *hostname_dn;
int hostname_len, hostname_dn_len;
if (!hostname)
return 0;
hostname_len = strlen(hostname);
hostname_dn = trash.area;
hostname_dn_len = dns_str_to_dn_label(hostname, hostname_len + 1,
hostname_dn, trash.size);
if (hostname_dn_len == -1)
goto err;
free(srv->hostname);
free(srv->hostname_dn);
srv->hostname = strdup(hostname);
srv->hostname_dn = strdup(hostname_dn);
srv->hostname_dn_len = hostname_dn_len;
if (!srv->hostname || !srv->hostname_dn)
goto err;
return 0;
err:
free(srv->hostname); srv->hostname = NULL;
free(srv->hostname_dn); srv->hostname_dn = NULL;
return -1;
}
/*
* Copy <src> server settings to <srv> server allocating
* everything needed.
* This function is not supposed to be called at any time, but only
* during server settings parsing or during server allocations from
* a server template, and just after having calloc()'ed a new server.
* So, <src> may only be a default server (when parsing server settings)
* or a server template (during server allocations from a server template).
* <srv_tmpl> distinguishes these two cases (must be 1 if <srv> is a template,
* 0 if not).
*/
static void srv_settings_cpy(struct server *srv, struct server *src, int srv_tmpl)
{
/* Connection source settings copy */
srv_conn_src_cpy(srv, src);
if (srv_tmpl) {
srv->addr = src->addr;
srv->svc_port = src->svc_port;
}
srv->pp_opts = src->pp_opts;
if (src->rdr_pfx != NULL) {
srv->rdr_pfx = strdup(src->rdr_pfx);
srv->rdr_len = src->rdr_len;
}
if (src->cookie != NULL) {
srv->cookie = strdup(src->cookie);
srv->cklen = src->cklen;
}
srv->use_ssl = src->use_ssl;
srv->check.addr = src->check.addr;
srv->agent.addr = src->agent.addr;
srv->check.use_ssl = src->check.use_ssl;
srv->check.port = src->check.port;
srv->check.sni = src->check.sni;
srv->check.alpn_str = src->check.alpn_str;
srv->check.alpn_len = src->check.alpn_len;
/* Note: 'flags' field has potentially been already initialized. */
srv->flags |= src->flags;
srv->do_check = src->do_check;
srv->do_agent = src->do_agent;
if (srv->check.port)
srv->flags |= SRV_F_CHECKPORT;
srv->check.inter = src->check.inter;
srv->check.fastinter = src->check.fastinter;
srv->check.downinter = src->check.downinter;
srv->agent.use_ssl = src->agent.use_ssl;
srv->agent.port = src->agent.port;
if (src->agent.tcpcheck_rules) {
srv->agent.tcpcheck_rules = calloc(1, sizeof(*srv->agent.tcpcheck_rules));
if (srv->agent.tcpcheck_rules) {
srv->agent.tcpcheck_rules->flags = src->agent.tcpcheck_rules->flags;
srv->agent.tcpcheck_rules->list = src->agent.tcpcheck_rules->list;
LIST_INIT(&srv->agent.tcpcheck_rules->preset_vars);
dup_tcpcheck_vars(&srv->agent.tcpcheck_rules->preset_vars,
&src->agent.tcpcheck_rules->preset_vars);
}
}
srv->agent.inter = src->agent.inter;
srv->agent.fastinter = src->agent.fastinter;
srv->agent.downinter = src->agent.downinter;
srv->maxqueue = src->maxqueue;
srv->minconn = src->minconn;
srv->maxconn = src->maxconn;
srv->slowstart = src->slowstart;
srv->observe = src->observe;
srv->onerror = src->onerror;
srv->onmarkeddown = src->onmarkeddown;
srv->onmarkedup = src->onmarkedup;
if (src->trackit != NULL)
srv->trackit = strdup(src->trackit);
srv->consecutive_errors_limit = src->consecutive_errors_limit;
srv->uweight = srv->iweight = src->iweight;
srv->check.send_proxy = src->check.send_proxy;
/* health: up, but will fall down at first failure */
srv->check.rise = srv->check.health = src->check.rise;
srv->check.fall = src->check.fall;
/* Here we check if 'disabled' is the default server state */
if (src->next_admin & (SRV_ADMF_CMAINT | SRV_ADMF_FMAINT)) {
srv->next_admin |= SRV_ADMF_CMAINT | SRV_ADMF_FMAINT;
srv->next_state = SRV_ST_STOPPED;
srv->check.state |= CHK_ST_PAUSED;
srv->check.health = 0;
}
/* health: up but will fall down at first failure */
srv->agent.rise = srv->agent.health = src->agent.rise;
srv->agent.fall = src->agent.fall;
if (src->resolvers_id != NULL)
srv->resolvers_id = strdup(src->resolvers_id);
srv->dns_opts.family_prio = src->dns_opts.family_prio;
srv->dns_opts.accept_duplicate_ip = src->dns_opts.accept_duplicate_ip;
srv->dns_opts.ignore_weight = src->dns_opts.ignore_weight;
if (srv->dns_opts.family_prio == AF_UNSPEC)
srv->dns_opts.family_prio = AF_INET6;
memcpy(srv->dns_opts.pref_net,
src->dns_opts.pref_net,
sizeof srv->dns_opts.pref_net);
srv->dns_opts.pref_net_nb = src->dns_opts.pref_net_nb;
srv->init_addr_methods = src->init_addr_methods;
srv->init_addr = src->init_addr;
#if defined(USE_OPENSSL)
srv_ssl_settings_cpy(srv, src);
#endif
#ifdef TCP_USER_TIMEOUT
srv->tcp_ut = src->tcp_ut;
#endif
srv->mux_proto = src->mux_proto;
srv->pool_purge_delay = src->pool_purge_delay;
srv->low_idle_conns = src->low_idle_conns;
srv->max_idle_conns = src->max_idle_conns;
srv->max_reuse = src->max_reuse;
if (srv_tmpl)
srv->srvrq = src->srvrq;
srv->check.via_socks4 = src->check.via_socks4;
srv->socks4_addr = src->socks4_addr;
}
struct server *new_server(struct proxy *proxy)
{
struct server *srv;
srv = calloc(1, sizeof *srv);
if (!srv)
return NULL;
srv->obj_type = OBJ_TYPE_SERVER;
srv->proxy = proxy;
LIST_INIT(&srv->actconns);
srv->pendconns = EB_ROOT;
srv->next_state = SRV_ST_RUNNING; /* early server setup */
srv->last_change = now.tv_sec;
srv->check.obj_type = OBJ_TYPE_CHECK;
srv->check.status = HCHK_STATUS_INI;
srv->check.server = srv;
srv->check.proxy = proxy;
srv->check.tcpcheck_rules = &proxy->tcpcheck_rules;
srv->agent.obj_type = OBJ_TYPE_CHECK;
srv->agent.status = HCHK_STATUS_INI;
srv->agent.server = srv;
srv->agent.proxy = proxy;
srv->xprt = srv->check.xprt = srv->agent.xprt = xprt_get(XPRT_RAW);
#if defined(USE_QUIC)
srv->cids = EB_ROOT_UNIQUE;
#endif
srv->extra_counters = NULL;
/* please don't put default server settings here, they are set in
* init_default_instance().
*/
return srv;
}
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
static int server_sni_expr_init(const char *file, int linenum, char **args, int cur_arg,
struct server *srv, struct proxy *proxy)
{
int ret;
char *err = NULL;
if (!srv->sni_expr)
return 0;
ret = server_parse_sni_expr(srv, proxy, &err);
if (!ret)
return 0;
display_parser_err(file, linenum, args, cur_arg, ret, &err);
free(err);
return ret;
}
#endif
/*
* Server initializations finalization.
* Initialize health check, agent check and SNI expression if enabled.
* Must not be called for a default server instance.
*/
static int server_finalize_init(const char *file, int linenum, char **args, int cur_arg,
struct server *srv, struct proxy *px)
{
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
int ret;
#endif
if (srv->do_check && srv->trackit) {
ha_alert("parsing [%s:%d]: unable to enable checks and tracking at the same time!\n",
file, linenum);
return ERR_ALERT | ERR_FATAL;
}
if (srv->do_agent && !srv->agent.port) {
ha_alert("parsing [%s:%d] : server %s does not have agent port. Agent check has been disabled.\n",
file, linenum, srv->id);
return ERR_ALERT | ERR_FATAL;
}
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
if ((ret = server_sni_expr_init(file, linenum, args, cur_arg, srv, px)) != 0)
return ret;
#endif
if (srv->flags & SRV_F_BACKUP)
px->srv_bck++;
else
px->srv_act++;
srv_lb_commit_status(srv);
return 0;
}
/*
* Parse as much as possible such a range string argument: low[-high]
* Set <nb_low> and <nb_high> values so that they may be reused by this loop
* for(int i = nb_low; i <= nb_high; i++)... with nb_low >= 1.
* Fails if 'low' < 0 or 'high' is present and not higher than 'low'.
* Returns 0 if succeeded, -1 if not.
*/
static int srv_tmpl_parse_range(struct server *srv, const char *arg, int *nb_low, int *nb_high)
{
char *nb_high_arg;
*nb_high = 0;
chunk_printf(&trash, "%s", arg);
*nb_low = atoi(trash.area);
if ((nb_high_arg = strchr(trash.area, '-'))) {
*nb_high_arg++ = '\0';
*nb_high = atoi(nb_high_arg);
}
else {
*nb_high += *nb_low;
*nb_low = 1;
}
if (*nb_low < 0 || *nb_high < *nb_low)
return -1;
return 0;
}
static inline void srv_set_id_from_prefix(struct server *srv, const char *prefix, int nb)
{
chunk_printf(&trash, "%s%d", prefix, nb);
free(srv->id);
srv->id = strdup(trash.area);
}
/*
* Initialize as much as possible servers from <srv> server template.
* Note that a server template is a special server with
* a few different parameters than a server which has
* been parsed mostly the same way as a server.
* Returns the number of servers successfully allocated,
* 'srv' template included.
*/
static int server_template_init(struct server *srv, struct proxy *px)
{
int i;
struct server *newsrv;
for (i = srv->tmpl_info.nb_low + 1; i <= srv->tmpl_info.nb_high; i++) {
newsrv = new_server(px);
if (!newsrv)
goto err;
newsrv->conf.file = strdup(srv->conf.file);
newsrv->conf.line = srv->conf.line;
srv_settings_cpy(newsrv, srv, 1);
srv_prepare_for_resolution(newsrv, srv->hostname);
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
if (newsrv->sni_expr) {
newsrv->ssl_ctx.sni = srv_sni_sample_parse_expr(newsrv, px, NULL, 0, NULL);
if (!newsrv->ssl_ctx.sni)
goto err;
}
#endif
/* Set this new server ID. */
srv_set_id_from_prefix(newsrv, srv->tmpl_info.prefix, i);
/* Linked backwards first. This will be restablished after parsing. */
newsrv->next = px->srv;
px->srv = newsrv;
}
srv_set_id_from_prefix(srv, srv->tmpl_info.prefix, srv->tmpl_info.nb_low);
return i - srv->tmpl_info.nb_low;
err:
srv_set_id_from_prefix(srv, srv->tmpl_info.prefix, srv->tmpl_info.nb_low);
if (newsrv) {
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
release_sample_expr(newsrv->ssl_ctx.sni);
#endif
free_check(&newsrv->agent);
free_check(&newsrv->check);
}
free(newsrv);
return i - srv->tmpl_info.nb_low;
}
int parse_server(const char *file, int linenum, char **args, struct proxy *curproxy,
struct proxy *defproxy, int parse_addr, int in_peers_section, int initial_resolve)
{
struct server *newsrv = NULL;
const char *err = NULL;
char *errmsg = NULL;
int err_code = 0;
unsigned val;
char *fqdn = NULL;
if (strcmp(args[0], "server") == 0 ||
strcmp(args[0], "peer") == 0 ||
strcmp(args[0], "default-server") == 0 ||
strcmp(args[0], "server-template") == 0) {
int cur_arg;
int defsrv = (*args[0] == 'd');
int srv = !defsrv && (*args[0] == 'p' || strcmp(args[0], "server") == 0);
int srv_tmpl = !defsrv && !srv;
int tmpl_range_low = 0, tmpl_range_high = 0;
if (!defsrv && curproxy == defproxy) {
ha_alert("parsing [%s:%d] : '%s' not allowed in 'defaults' section.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
else if (warnifnotcap(curproxy, PR_CAP_BE, file, linenum, args[0], NULL))
err_code |= ERR_WARN;
/* There is no mandatory first arguments for default server. */
if (srv && parse_addr) {
if (!*args[2]) {
if (in_peers_section) {
return 0;
}
else {
/* 'server' line number of argument check. */
ha_alert("parsing [%s:%d] : '%s' expects <name> and <addr>[:<port>] as arguments.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
err = invalid_char(args[1]);
}
else if (srv_tmpl) {
if (!*args[3]) {
/* 'server-template' line number of argument check. */
ha_alert("parsing [%s:%d] : '%s' expects <prefix> <nb | range> <addr>[:<port>] as arguments.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
err = invalid_prefix_char(args[1]);
}
if (err) {
ha_alert("parsing [%s:%d] : character '%c' is not permitted in %s %s '%s'.\n",
file, linenum, *err, args[0], srv ? "name" : "prefix", args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
cur_arg = 2;
if (srv_tmpl) {
/* Parse server-template <nb | range> arg. */
if (srv_tmpl_parse_range(newsrv, args[cur_arg], &tmpl_range_low, &tmpl_range_high) < 0) {
ha_alert("parsing [%s:%d] : Wrong %s number or range arg '%s'.\n",
file, linenum, args[0], args[cur_arg]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
cur_arg++;
}
if (!defsrv) {
struct sockaddr_storage *sk;
int port1, port2, port;
newsrv = new_server(curproxy);
if (!newsrv) {
ha_alert("parsing [%s:%d] : out of memory.\n", file, linenum);
err_code |= ERR_ALERT | ERR_ABORT;
goto out;
}
if (srv_tmpl) {
newsrv->tmpl_info.nb_low = tmpl_range_low;
newsrv->tmpl_info.nb_high = tmpl_range_high;
}
/* the servers are linked backwards first */
newsrv->next = curproxy->srv;
curproxy->srv = newsrv;
newsrv->conf.file = strdup(file);
newsrv->conf.line = linenum;
/* Note: for a server template, its id is its prefix.
* This is a temporary id which will be used for server allocations to come
* after parsing.
*/
if (srv)
newsrv->id = strdup(args[1]);
else
newsrv->tmpl_info.prefix = strdup(args[1]);
/* several ways to check the port component :
* - IP => port=+0, relative (IPv4 only)
* - IP: => port=+0, relative
* - IP:N => port=N, absolute
* - IP:+N => port=+N, relative
* - IP:-N => port=-N, relative
*/
if (!parse_addr)
goto skip_addr;
sk = str2sa_range(args[cur_arg], &port, &port1, &port2, NULL, NULL,
&errmsg, NULL, &fqdn,
(initial_resolve ? PA_O_RESOLVE : 0) | PA_O_PORT_OK | PA_O_PORT_OFS | PA_O_STREAM | PA_O_XPRT | PA_O_CONNECT);
if (!sk) {
ha_alert("parsing [%s:%d] : '%s %s' : %s\n", file, linenum, args[0], args[1], errmsg);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (!port1 || !port2) {
/* no port specified, +offset, -offset */
newsrv->flags |= SRV_F_MAPPORTS;
}
/* save hostname and create associated name resolution */
if (fqdn) {
if (fqdn[0] == '_') { /* SRV record */
/* Check if a SRV request already exists, and if not, create it */
if ((newsrv->srvrq = find_srvrq_by_name(fqdn, curproxy)) == NULL)
newsrv->srvrq = new_dns_srvrq(newsrv, fqdn);
if (newsrv->srvrq == NULL) {
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (srv_prepare_for_resolution(newsrv, fqdn) == -1) {
ha_alert("parsing [%s:%d] : Can't create DNS resolution for server '%s'\n",
file, linenum, newsrv->id);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
newsrv->addr = *sk;
newsrv->svc_port = port;
// we don't need to lock the server here, because
// we are in the process of initializing
srv_set_addr_desc(newsrv);
if (!newsrv->srvrq && !newsrv->hostname && !protocol_by_family(newsrv->addr.ss_family)) {
ha_alert("parsing [%s:%d] : Unknown protocol family %d '%s'\n",
file, linenum, newsrv->addr.ss_family, args[cur_arg]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
cur_arg++;
skip_addr:
/* Copy default server settings to new server settings. */
srv_settings_cpy(newsrv, &curproxy->defsrv, 0);
HA_SPIN_INIT(&newsrv->lock);
} else {
newsrv = &curproxy->defsrv;
cur_arg = 1;
newsrv->dns_opts.family_prio = AF_INET6;
newsrv->dns_opts.accept_duplicate_ip = 0;
}
while (*args[cur_arg]) {
if (strcmp(args[cur_arg], "init-addr") == 0) {
char *p, *end;
int done;
struct sockaddr_storage sa;
newsrv->init_addr_methods = 0;
memset(&newsrv->init_addr, 0, sizeof(newsrv->init_addr));
for (p = args[cur_arg + 1]; *p; p = end) {
/* cut on next comma */
for (end = p; *end && *end != ','; end++);
if (*end)
*(end++) = 0;
memset(&sa, 0, sizeof(sa));
if (strcmp(p, "libc") == 0) {
done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_LIBC);
}
else if (strcmp(p, "last") == 0) {
done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_LAST);
}
else if (strcmp(p, "none") == 0) {
done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_NONE);
}
else if (str2ip2(p, &sa, 0)) {
if (is_addr(&newsrv->init_addr)) {
ha_alert("parsing [%s:%d]: '%s' : initial address already specified, cannot add '%s'.\n",
file, linenum, args[cur_arg], p);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
newsrv->init_addr = sa;
done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_IP);
}
else {
ha_alert("parsing [%s:%d]: '%s' : unknown init-addr method '%s', supported methods are 'libc', 'last', 'none'.\n",
file, linenum, args[cur_arg], p);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (!done) {
ha_alert("parsing [%s:%d]: '%s' : too many init-addr methods when trying to add '%s'\n",
file, linenum, args[cur_arg], p);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "resolvers") == 0) {
free(newsrv->resolvers_id);
newsrv->resolvers_id = strdup(args[cur_arg + 1]);
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "resolve-opts") == 0) {
char *p, *end;
for (p = args[cur_arg + 1]; *p; p = end) {
/* cut on next comma */
for (end = p; *end && *end != ','; end++);
if (*end)
*(end++) = 0;
if (strcmp(p, "allow-dup-ip") == 0) {
newsrv->dns_opts.accept_duplicate_ip = 1;
}
else if (strcmp(p, "ignore-weight") == 0) {
newsrv->dns_opts.ignore_weight = 1;
}
else if (strcmp(p, "prevent-dup-ip") == 0) {
newsrv->dns_opts.accept_duplicate_ip = 0;
}
else {
ha_alert("parsing [%s:%d]: '%s' : unknown resolve-opts option '%s', supported methods are 'allow-dup-ip', 'ignore-weight', and 'prevent-dup-ip'.\n",
file, linenum, args[cur_arg], p);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "resolve-prefer") == 0) {
if (strcmp(args[cur_arg + 1], "ipv4") == 0)
newsrv->dns_opts.family_prio = AF_INET;
else if (strcmp(args[cur_arg + 1], "ipv6") == 0)
newsrv->dns_opts.family_prio = AF_INET6;
else {
ha_alert("parsing [%s:%d]: '%s' expects either ipv4 or ipv6 as argument.\n",
file, linenum, args[cur_arg]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "resolve-net") == 0) {
char *p, *e;
unsigned char mask;
struct dns_options *opt;
if (!args[cur_arg + 1] || args[cur_arg + 1][0] == '\0') {
ha_alert("parsing [%s:%d]: '%s' expects a list of networks.\n",
file, linenum, args[cur_arg]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
opt = &newsrv->dns_opts;
/* Split arguments by comma, and convert it from ipv4 or ipv6
* string network in in_addr or in6_addr.
*/
p = args[cur_arg + 1];
e = p;
while (*p != '\0') {
/* If no room available, return error. */
if (opt->pref_net_nb >= SRV_MAX_PREF_NET) {
ha_alert("parsing [%s:%d]: '%s' exceed %d networks.\n",
file, linenum, args[cur_arg], SRV_MAX_PREF_NET);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
/* look for end or comma. */
while (*e != ',' && *e != '\0')
e++;
if (*e == ',') {
*e = '\0';
e++;
}
if (str2net(p, 0, &opt->pref_net[opt->pref_net_nb].addr.in4,
&opt->pref_net[opt->pref_net_nb].mask.in4)) {
/* Try to convert input string from ipv4 or ipv6 network. */
opt->pref_net[opt->pref_net_nb].family = AF_INET;
} else if (str62net(p, &opt->pref_net[opt->pref_net_nb].addr.in6,
&mask)) {
/* Try to convert input string from ipv6 network. */
len2mask6(mask, &opt->pref_net[opt->pref_net_nb].mask.in6);
opt->pref_net[opt->pref_net_nb].family = AF_INET6;
} else {
/* All network conversions fail, return error. */
ha_alert("parsing [%s:%d]: '%s': invalid network '%s'.\n",
file, linenum, args[cur_arg], p);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
opt->pref_net_nb++;
p = e;
}
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "weight") == 0) {
int w;
w = atol(args[cur_arg + 1]);
if (w < 0 || w > SRV_UWGHT_MAX) {
ha_alert("parsing [%s:%d] : weight of server %s is not within 0 and %d (%d).\n",
file, linenum, newsrv->id, SRV_UWGHT_MAX, w);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
newsrv->uweight = newsrv->iweight = w;
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "log-proto") == 0) {
if (strcmp(args[cur_arg + 1], "legacy") == 0)
newsrv->log_proto = SRV_LOG_PROTO_LEGACY;
else if (strcmp(args[cur_arg + 1], "octet-count") == 0)
newsrv->log_proto = SRV_LOG_PROTO_OCTET_COUNTING;
else {
ha_alert("parsing [%s:%d]: '%s' expects one of 'legacy' or "
"'octet-count' but got '%s'\n",
file, linenum, args[cur_arg], args[cur_arg + 1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "minconn") == 0) {
newsrv->minconn = atol(args[cur_arg + 1]);
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "maxconn") == 0) {
newsrv->maxconn = atol(args[cur_arg + 1]);
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "maxqueue") == 0) {
newsrv->maxqueue = atol(args[cur_arg + 1]);
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "slowstart") == 0) {
/* slowstart is stored in seconds */
const char *err = parse_time_err(args[cur_arg + 1], &val, TIME_UNIT_MS);
if (err == PARSE_TIME_OVER) {
ha_alert("parsing [%s:%d]: timer overflow in argument <%s> to <%s> of server %s, maximum value is 2147483647 ms (~24.8 days).\n",
file, linenum, args[cur_arg+1], args[cur_arg], newsrv->id);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
else if (err == PARSE_TIME_UNDER) {
ha_alert("parsing [%s:%d]: timer underflow in argument <%s> to <%s> of server %s, minimum non-null value is 1 ms.\n",
file, linenum, args[cur_arg+1], args[cur_arg], newsrv->id);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
else if (err) {
ha_alert("parsing [%s:%d] : unexpected character '%c' in 'slowstart' argument of server %s.\n",
file, linenum, *err, newsrv->id);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
newsrv->slowstart = (val + 999) / 1000;
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "on-error") == 0) {
if (strcmp(args[cur_arg + 1], "fastinter") == 0)
newsrv->onerror = HANA_ONERR_FASTINTER;
else if (strcmp(args[cur_arg + 1], "fail-check") == 0)
newsrv->onerror = HANA_ONERR_FAILCHK;
else if (strcmp(args[cur_arg + 1], "sudden-death") == 0)
newsrv->onerror = HANA_ONERR_SUDDTH;
else if (strcmp(args[cur_arg + 1], "mark-down") == 0)
newsrv->onerror = HANA_ONERR_MARKDWN;
else {
ha_alert("parsing [%s:%d]: '%s' expects one of 'fastinter', "
"'fail-check', 'sudden-death' or 'mark-down' but got '%s'\n",
file, linenum, args[cur_arg], args[cur_arg + 1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "on-marked-down") == 0) {
if (strcmp(args[cur_arg + 1], "shutdown-sessions") == 0)
newsrv->onmarkeddown = HANA_ONMARKEDDOWN_SHUTDOWNSESSIONS;
else {
ha_alert("parsing [%s:%d]: '%s' expects 'shutdown-sessions' but got '%s'\n",
file, linenum, args[cur_arg], args[cur_arg + 1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "on-marked-up") == 0) {
if (strcmp(args[cur_arg + 1], "shutdown-backup-sessions") == 0)
newsrv->onmarkedup = HANA_ONMARKEDUP_SHUTDOWNBACKUPSESSIONS;
else {
ha_alert("parsing [%s:%d]: '%s' expects 'shutdown-backup-sessions' but got '%s'\n",
file, linenum, args[cur_arg], args[cur_arg + 1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "error-limit") == 0) {
if (!*args[cur_arg + 1]) {
ha_alert("parsing [%s:%d]: '%s' expects an integer argument.\n",
file, linenum, args[cur_arg]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
newsrv->consecutive_errors_limit = atoi(args[cur_arg + 1]);
if (newsrv->consecutive_errors_limit <= 0) {
ha_alert("parsing [%s:%d]: %s has to be > 0.\n",
file, linenum, args[cur_arg]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "usesrc") == 0) { /* address to use outside: needs "source" first */
ha_alert("parsing [%s:%d] : '%s' only allowed after a '%s' statement.\n",
file, linenum, "usesrc", "source");
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
else {
static int srv_dumped;
struct srv_kw *kw;
char *err;
kw = srv_find_kw(args[cur_arg]);
if (kw) {
char *err = NULL;
int code;
if (!kw->parse) {
ha_alert("parsing [%s:%d] : '%s %s' : '%s' option is not implemented in this version (check build options).\n",
file, linenum, args[0], args[1], args[cur_arg]);
if (kw->skip != -1)
cur_arg += 1 + kw->skip ;
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (defsrv && !kw->default_ok) {
ha_alert("parsing [%s:%d] : '%s %s' : '%s' option is not accepted in default-server sections.\n",
file, linenum, args[0], args[1], args[cur_arg]);
if (kw->skip != -1)
cur_arg += 1 + kw->skip ;
err_code |= ERR_ALERT;
continue;
}
code = kw->parse(args, &cur_arg, curproxy, newsrv, &err);
err_code |= code;
if (code) {
display_parser_err(file, linenum, args, cur_arg, code, &err);
if (code & ERR_FATAL) {
free(err);
if (kw->skip != -1)
cur_arg += 1 + kw->skip;
goto out;
}
}
free(err);
if (kw->skip != -1)
cur_arg += 1 + kw->skip;
continue;
}
err = NULL;
if (!srv_dumped) {
srv_dump_kws(&err);
indent_msg(&err, 4);
srv_dumped = 1;
}
ha_alert("parsing [%s:%d] : '%s %s' unknown keyword '%s'.%s%s\n",
file, linenum, args[0], args[1], args[cur_arg],
err ? " Registered keywords :" : "", err ? err : "");
free(err);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
if (!defsrv)
err_code |= server_finalize_init(file, linenum, args, cur_arg, newsrv, curproxy);
if (err_code & ERR_FATAL)
goto out;
if (srv_tmpl)
server_template_init(newsrv, curproxy);
}
free(fqdn);
return 0;
out:
free(fqdn);
free(errmsg);
return err_code;
}
/* Returns a pointer to the first server matching either id <id>.
* NULL is returned if no match is found.
* the lookup is performed in the backend <bk>
*/
struct server *server_find_by_id(struct proxy *bk, int id)
{
struct eb32_node *eb32;
struct server *curserver;
if (!bk || (id ==0))
return NULL;
/* <bk> has no backend capabilities, so it can't have a server */
if (!(bk->cap & PR_CAP_BE))
return NULL;
curserver = NULL;
eb32 = eb32_lookup(&bk->conf.used_server_id, id);
if (eb32)
curserver = container_of(eb32, struct server, conf.id);
return curserver;
}
/* Returns a pointer to the first server matching either name <name>, or id
* if <name> starts with a '#'. NULL is returned if no match is found.
* the lookup is performed in the backend <bk>
*/
struct server *server_find_by_name(struct proxy *bk, const char *name)
{
struct server *curserver;
if (!bk || !name)
return NULL;
/* <bk> has no backend capabilities, so it can't have a server */
if (!(bk->cap & PR_CAP_BE))
return NULL;
curserver = NULL;
if (*name == '#') {
curserver = server_find_by_id(bk, atoi(name + 1));
if (curserver)
return curserver;
}
else {
curserver = bk->srv;
while (curserver && (strcmp(curserver->id, name) != 0))
curserver = curserver->next;
if (curserver)
return curserver;
}
return NULL;
}
struct server *server_find_best_match(struct proxy *bk, char *name, int id, int *diff)
{
struct server *byname;
struct server *byid;
if (!name && !id)
return NULL;
if (diff)
*diff = 0;
byname = byid = NULL;
if (name) {
byname = server_find_by_name(bk, name);
if (byname && (!id || byname->puid == id))
return byname;
}
/* remaining possibilities :
* - name not set
* - name set but not found
* - name found but ID doesn't match
*/
if (id) {
byid = server_find_by_id(bk, id);
if (byid) {
if (byname) {
/* use id only if forced by configuration */
if (byid->flags & SRV_F_FORCED_ID) {
if (diff)
*diff |= 2;
return byid;
}
else {
if (diff)
*diff |= 1;
return byname;
}
}
/* remaining possibilities:
* - name not set
* - name set but not found
*/
if (name && diff)
*diff |= 2;
return byid;
}
/* id bot found */
if (byname) {
if (diff)
*diff |= 1;
return byname;
}
}
return NULL;
}
/* Update a server state using the parameters available in the params list.
*
* Grabs the server lock during operation.
*/
static void srv_update_state(struct server *srv, int version, char **params)
{
char *p;
struct buffer *msg;
/* fields since version 1
* and common to all other upcoming versions
*/
enum srv_state srv_op_state;
enum srv_admin srv_admin_state;
unsigned srv_uweight, srv_iweight;
unsigned long srv_last_time_change;
short srv_check_status;
enum chk_result srv_check_result;
int srv_check_health;
int srv_check_state, srv_agent_state;
int bk_f_forced_id;
int srv_f_forced_id;
int fqdn_set_by_cli;
const char *fqdn;
const char *port_str;
unsigned int port;
char *srvrecord;
#ifdef USE_OPENSSL
int use_ssl;
#endif
fqdn = NULL;
port = 0;
msg = get_trash_chunk();
switch (version) {
case 1:
/*
* now we can proceed with server's state update:
* srv_addr: params[0]
* srv_op_state: params[1]
* srv_admin_state: params[2]
* srv_uweight: params[3]
* srv_iweight: params[4]
* srv_last_time_change: params[5]
* srv_check_status: params[6]
* srv_check_result: params[7]
* srv_check_health: params[8]
* srv_check_state: params[9]
* srv_agent_state: params[10]
* bk_f_forced_id: params[11]
* srv_f_forced_id: params[12]
* srv_fqdn: params[13]
* srv_port: params[14]
* srvrecord: params[15]
* srv_use_ssl: params[16]
*/
/* validating srv_op_state */
p = NULL;
errno = 0;
srv_op_state = strtol(params[1], &p, 10);
if ((p == params[1]) || errno == EINVAL || errno == ERANGE ||
(srv_op_state != SRV_ST_STOPPED &&
srv_op_state != SRV_ST_STARTING &&
srv_op_state != SRV_ST_RUNNING &&
srv_op_state != SRV_ST_STOPPING)) {
chunk_appendf(msg, ", invalid srv_op_state value '%s'", params[1]);
}
/* validating srv_admin_state */
p = NULL;
errno = 0;
srv_admin_state = strtol(params[2], &p, 10);
fqdn_set_by_cli = !!(srv_admin_state & SRV_ADMF_HMAINT);
/* inherited statuses will be recomputed later.
* Also disable SRV_ADMF_HMAINT flag (set from stats socket fqdn).
*/
srv_admin_state &= ~SRV_ADMF_IDRAIN & ~SRV_ADMF_IMAINT & ~SRV_ADMF_HMAINT;
if ((p == params[2]) || errno == EINVAL || errno == ERANGE ||
(srv_admin_state != 0 &&
srv_admin_state != SRV_ADMF_FMAINT &&
srv_admin_state != SRV_ADMF_CMAINT &&
srv_admin_state != (SRV_ADMF_CMAINT | SRV_ADMF_FMAINT) &&
srv_admin_state != (SRV_ADMF_CMAINT | SRV_ADMF_FDRAIN) &&
srv_admin_state != SRV_ADMF_FDRAIN)) {
chunk_appendf(msg, ", invalid srv_admin_state value '%s'", params[2]);
}
/* validating srv_uweight */
p = NULL;
errno = 0;
srv_uweight = strtol(params[3], &p, 10);
if ((p == params[3]) || errno == EINVAL || errno == ERANGE || (srv_uweight > SRV_UWGHT_MAX))
chunk_appendf(msg, ", invalid srv_uweight value '%s'", params[3]);
/* validating srv_iweight */
p = NULL;
errno = 0;
srv_iweight = strtol(params[4], &p, 10);
if ((p == params[4]) || errno == EINVAL || errno == ERANGE || (srv_iweight > SRV_UWGHT_MAX))
chunk_appendf(msg, ", invalid srv_iweight value '%s'", params[4]);
/* validating srv_last_time_change */
p = NULL;
errno = 0;
srv_last_time_change = strtol(params[5], &p, 10);
if ((p == params[5]) || errno == EINVAL || errno == ERANGE)
chunk_appendf(msg, ", invalid srv_last_time_change value '%s'", params[5]);
/* validating srv_check_status */
p = NULL;
errno = 0;
srv_check_status = strtol(params[6], &p, 10);
if (p == params[6] || errno == EINVAL || errno == ERANGE ||
(srv_check_status >= HCHK_STATUS_SIZE))
chunk_appendf(msg, ", invalid srv_check_status value '%s'", params[6]);
/* validating srv_check_result */
p = NULL;
errno = 0;
srv_check_result = strtol(params[7], &p, 10);
if ((p == params[7]) || errno == EINVAL || errno == ERANGE ||
(srv_check_result != CHK_RES_UNKNOWN &&
srv_check_result != CHK_RES_NEUTRAL &&
srv_check_result != CHK_RES_FAILED &&
srv_check_result != CHK_RES_PASSED &&
srv_check_result != CHK_RES_CONDPASS)) {
chunk_appendf(msg, ", invalid srv_check_result value '%s'", params[7]);
}
/* validating srv_check_health */
p = NULL;
errno = 0;
srv_check_health = strtol(params[8], &p, 10);
if (p == params[8] || errno == EINVAL || errno == ERANGE)
chunk_appendf(msg, ", invalid srv_check_health value '%s'", params[8]);
/* validating srv_check_state */
p = NULL;
errno = 0;
srv_check_state = strtol(params[9], &p, 10);
if (p == params[9] || errno == EINVAL || errno == ERANGE ||
(srv_check_state & ~(CHK_ST_INPROGRESS | CHK_ST_CONFIGURED | CHK_ST_ENABLED | CHK_ST_PAUSED | CHK_ST_AGENT)))
chunk_appendf(msg, ", invalid srv_check_state value '%s'", params[9]);
/* validating srv_agent_state */
p = NULL;
errno = 0;
srv_agent_state = strtol(params[10], &p, 10);
if (p == params[10] || errno == EINVAL || errno == ERANGE ||
(srv_agent_state & ~(CHK_ST_INPROGRESS | CHK_ST_CONFIGURED | CHK_ST_ENABLED | CHK_ST_PAUSED | CHK_ST_AGENT)))
chunk_appendf(msg, ", invalid srv_agent_state value '%s'", params[10]);
/* validating bk_f_forced_id */
p = NULL;
errno = 0;
bk_f_forced_id = strtol(params[11], &p, 10);
if (p == params[11] || errno == EINVAL || errno == ERANGE || !((bk_f_forced_id == 0) || (bk_f_forced_id == 1)))
chunk_appendf(msg, ", invalid bk_f_forced_id value '%s'", params[11]);
/* validating srv_f_forced_id */
p = NULL;
errno = 0;
srv_f_forced_id = strtol(params[12], &p, 10);
if (p == params[12] || errno == EINVAL || errno == ERANGE || !((srv_f_forced_id == 0) || (srv_f_forced_id == 1)))
chunk_appendf(msg, ", invalid srv_f_forced_id value '%s'", params[12]);
/* validating srv_fqdn */
fqdn = params[13];
if (fqdn && *fqdn == '-')
fqdn = NULL;
if (fqdn && (strlen(fqdn) > DNS_MAX_NAME_SIZE || invalid_domainchar(fqdn))) {
chunk_appendf(msg, ", invalid srv_fqdn value '%s'", params[13]);
fqdn = NULL;
}
port_str = params[14];
if (port_str) {
port = strl2uic(port_str, strlen(port_str));
if (port > USHRT_MAX) {
chunk_appendf(msg, ", invalid srv_port value '%s'", port_str);
port_str = NULL;
}
}
/* SRV record
* NOTE: in HAProxy, SRV records must start with an underscore '_'
*/
srvrecord = params[15];
if (srvrecord && *srvrecord != '_')
srvrecord = NULL;
#ifdef USE_OPENSSL
use_ssl = strtol(params[16], &p, 10);
#endif
/* don't apply anything if one error has been detected */
if (msg->data)
goto out;
HA_SPIN_LOCK(SERVER_LOCK, &srv->lock);
/* recover operational state and apply it to this server
* and all servers tracking this one */
srv->check.health = srv_check_health;
switch (srv_op_state) {
case SRV_ST_STOPPED:
srv->check.health = 0;
srv_set_stopped(srv, "changed from server-state after a reload", NULL);
break;
case SRV_ST_STARTING:
/* If rise == 1 there is no STARTING state, let's switch to
* RUNNING
*/
if (srv->check.rise == 1) {
srv->check.health = srv->check.rise + srv->check.fall - 1;
srv_set_running(srv, "", NULL);
break;
}
if (srv->check.health < 1 || srv->check.health >= srv->check.rise)
srv->check.health = srv->check.rise - 1;
srv->next_state = srv_op_state;
break;
case SRV_ST_STOPPING:
/* If fall == 1 there is no STOPPING state, let's switch to
* STOPPED
*/
if (srv->check.fall == 1) {
srv->check.health = 0;
srv_set_stopped(srv, "changed from server-state after a reload", NULL);
break;
}
if (srv->check.health < srv->check.rise ||
srv->check.health > srv->check.rise + srv->check.fall - 2)
srv->check.health = srv->check.rise;
srv_set_stopping(srv, "changed from server-state after a reload", NULL);
break;
case SRV_ST_RUNNING:
srv->check.health = srv->check.rise + srv->check.fall - 1;
srv_set_running(srv, "", NULL);
break;
}
/* When applying server state, the following rules apply:
* - in case of a configuration change, we apply the setting from the new
* configuration, regardless of old running state
* - if no configuration change, we apply old running state only if old running
* state is different from new configuration state
*/
/* configuration has changed */
if ((srv_admin_state & SRV_ADMF_CMAINT) != (srv->next_admin & SRV_ADMF_CMAINT)) {
if (srv->next_admin & SRV_ADMF_CMAINT)
srv_adm_set_maint(srv);
else
srv_adm_set_ready(srv);
}
/* configuration is the same, let's compate old running state and new conf state */
else {
if (srv_admin_state & SRV_ADMF_FMAINT && !(srv->next_admin & SRV_ADMF_CMAINT))
srv_adm_set_maint(srv);
else if (!(srv_admin_state & SRV_ADMF_FMAINT) && (srv->next_admin & SRV_ADMF_CMAINT))
srv_adm_set_ready(srv);
}
/* apply drain mode if server is currently enabled */
if (!(srv->next_admin & SRV_ADMF_FMAINT) && (srv_admin_state & SRV_ADMF_FDRAIN)) {
/* The SRV_ADMF_FDRAIN flag is inherited when srv->iweight is 0
* (srv->iweight is the weight set up in configuration).
* There are two possible reasons for FDRAIN to have been present :
* - previous config weight was zero
* - "set server b/s drain" was sent to the CLI
*
* In the first case, we simply want to drop this drain state
* if the new weight is not zero anymore, meaning the administrator
* has intentionally turned the weight back to a positive value to
* enable the server again after an operation. In the second case,
* the drain state was forced on the CLI regardless of the config's
* weight so we don't want a change to the config weight to lose this
* status. What this means is :
* - if previous weight was 0 and new one is >0, drop the DRAIN state.
* - if the previous weight was >0, keep it.
*/
if (srv_iweight > 0 || srv->iweight == 0)
srv_adm_set_drain(srv);
}
srv->last_change = date.tv_sec - srv_last_time_change;
srv->check.status = srv_check_status;
srv->check.result = srv_check_result;
/* Only case we want to apply is removing ENABLED flag which could have been
* done by the "disable health" command over the stats socket
*/
if ((srv->check.state & CHK_ST_CONFIGURED) &&
(srv_check_state & CHK_ST_CONFIGURED) &&
!(srv_check_state & CHK_ST_ENABLED))
srv->check.state &= ~CHK_ST_ENABLED;
/* Only case we want to apply is removing ENABLED flag which could have been
* done by the "disable agent" command over the stats socket
*/
if ((srv->agent.state & CHK_ST_CONFIGURED) &&
(srv_agent_state & CHK_ST_CONFIGURED) &&
!(srv_agent_state & CHK_ST_ENABLED))
srv->agent.state &= ~CHK_ST_ENABLED;
/* We want to apply the previous 'running' weight (srv_uweight) only if there
* was no change in the configuration: both previous and new iweight are equals
*
* It means that a configuration file change has precedence over a unix socket change
* for server's weight
*
* by default, HAProxy applies the following weight when parsing the configuration
* srv->uweight = srv->iweight
*/
if (srv_iweight == srv->iweight) {
srv->uweight = srv_uweight;
}
server_recalc_eweight(srv, 1);
/* load server IP address */
if (strcmp(params[0], "-") != 0)
srv->lastaddr = strdup(params[0]);
if (fqdn && srv->hostname) {
if (strcmp(srv->hostname, fqdn) == 0) {
/* Here we reset the 'set from stats socket FQDN' flag
* to support such transitions:
* Let's say initial FQDN value is foo1 (in configuration file).
* - FQDN changed from stats socket, from foo1 to foo2 value,
* - FQDN changed again from file configuration (with the same previous value
set from stats socket, from foo1 to foo2 value),
* - reload for any other reason than a FQDN modification,
* the configuration file FQDN matches the fqdn server state file value.
* So we must reset the 'set from stats socket FQDN' flag to be consistent with
* any further FQDN modification.
*/
srv->next_admin &= ~SRV_ADMF_HMAINT;
}
else {
/* If the FDQN has been changed from stats socket,
* apply fqdn state file value (which is the value set
* from stats socket).
* Also ensure the runtime resolver will process this resolution.
*/
if (fqdn_set_by_cli) {
srv_set_fqdn(srv, fqdn, 0);
srv->flags &= ~SRV_F_NO_RESOLUTION;
srv->next_admin |= SRV_ADMF_HMAINT;
}
}
}
/* If all the conditions below are validated, this means
* we're evaluating a server managed by SRV resolution
*/
else if (fqdn && !srv->hostname && srvrecord) {
int res;
/* we can't apply previous state if SRV record has changed */
if (srv->srvrq && strcmp(srv->srvrq->name, srvrecord) != 0) {
chunk_appendf(msg, ", SRV record mismatch between configuration ('%s') and state file ('%s) for server '%s'. Previous state not applied", srv->srvrq->name, srvrecord, srv->id);
HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
goto out;
}
/* create or find a SRV resolution for this srv record */
if (srv->srvrq == NULL && (srv->srvrq = find_srvrq_by_name(srvrecord, srv->proxy)) == NULL)
srv->srvrq = new_dns_srvrq(srv, srvrecord);
if (srv->srvrq == NULL) {
chunk_appendf(msg, ", can't create or find SRV resolution '%s' for server '%s'", srvrecord, srv->id);
HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
goto out;
}
/* prepare DNS resolution for this server */
res = srv_prepare_for_resolution(srv, fqdn);
if (res == -1) {
chunk_appendf(msg, ", can't allocate memory for DNS resolution for server '%s'", srv->id);
HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
goto out;
}
/* configure check.port accordingly */
if ((srv->check.state & CHK_ST_CONFIGURED) &&
!(srv->flags & SRV_F_CHECKPORT))
srv->check.port = port;
/* Unset SRV_F_MAPPORTS for SRV records.
* SRV_F_MAPPORTS is unfortunately set by parse_server()
* because no ports are provided in the configuration file.
* This is because HAProxy will use the port found into the SRV record.
*/
srv->flags &= ~SRV_F_MAPPORTS;
}
if (port_str)
srv->svc_port = port;
#ifdef USE_OPENSSL
/* configure ssl if connection has been initiated at startup */
if (srv->ssl_ctx.ctx != NULL)
ssl_sock_set_srv(srv, use_ssl);
#endif
HA_SPIN_UNLOCK(SERVER_LOCK, &srv->lock);
break;
default:
chunk_appendf(msg, ", version '%d' not supported", version);
}
out:
if (msg->data) {
chunk_appendf(msg, "\n");
ha_warning("server-state application failed for server '%s/%s'%s",
srv->proxy->id, srv->id, msg->area);
}
}
/*
* read next line from file <f> and return the server state version if one found.
* If no version is found, then 0 is returned
* Note that this should be the first read on <f>
*/
static int srv_state_get_version(FILE *f) {
char buf[2];
int ret;
/* first character of first line of the file must contain the version of the export */
if (fgets(buf, 2, f) == NULL) {
return 0;
}
ret = atoi(buf);
if ((ret < SRV_STATE_FILE_VERSION_MIN) ||
(ret > SRV_STATE_FILE_VERSION_MAX))
return 0;
return ret;
}
/*
* parses server state line stored in <buf> and supposedly in version <version>.
* Set <params> and <srv_params> accordingly.
* In case of error, params[0] is set to NULL.
*/
static void srv_state_parse_line(char *buf, const int version, char **params, char **srv_params)
{
int buflen, arg, srv_arg;
char *cur, *end;
buflen = strlen(buf);
cur = buf;
end = cur + buflen;
/* we need at least one character */
if (buflen == 0) {
params[0] = NULL;
return;
}
/* ignore blank characters at the beginning of the line */
while (isspace((unsigned char)*cur))
++cur;
/* Ignore empty or commented lines */
if (cur == end || *cur == '#') {
params[0] = NULL;
return;
}
/* truncated lines */
if (buf[buflen - 1] != '\n') {
//ha_warning("server-state file '%s': truncated line\n", filepath);
params[0] = NULL;
return;
}
/* Removes trailing '\n' */
buf[buflen - 1] = '\0';
/* we're now ready to move the line into *srv_params[] */
params[0] = cur;
arg = 1;
srv_arg = 0;
while (*cur && arg < SRV_STATE_FILE_MAX_FIELDS) {
if (isspace((unsigned char)*cur)) {
*cur = '\0';
++cur;
while (isspace((unsigned char)*cur))
++cur;
switch (version) {
case 1:
/*
* srv_addr: params[4] => srv_params[0]
* srv_op_state: params[5] => srv_params[1]
* srv_admin_state: params[6] => srv_params[2]
* srv_uweight: params[7] => srv_params[3]
* srv_iweight: params[8] => srv_params[4]
* srv_last_time_change: params[9] => srv_params[5]
* srv_check_status: params[10] => srv_params[6]
* srv_check_result: params[11] => srv_params[7]
* srv_check_health: params[12] => srv_params[8]
* srv_check_state: params[13] => srv_params[9]
* srv_agent_state: params[14] => srv_params[10]
* bk_f_forced_id: params[15] => srv_params[11]
* srv_f_forced_id: params[16] => srv_params[12]
* srv_fqdn: params[17] => srv_params[13]
* srv_port: params[18] => srv_params[14]
* srvrecord: params[19] => srv_params[15]
*/
if (arg >= 4) {
srv_params[srv_arg] = cur;
++srv_arg;
}
break;
}
params[arg] = cur;
++arg;
}
else {
++cur;
}
}
/* if line is incomplete line, then ignore it.
* otherwise, update useful flags */
switch (version) {
case 1:
if (arg < SRV_STATE_FILE_NB_FIELDS_VERSION_1) {
params[0] = NULL;
return;
}
break;
}
return;
}
/* This function parses all the proxies and only take care of the backends (since we're looking for server)
* For each proxy, it does the following:
* - opens its server state file (either one or local one)
* - read whole file, line by line
* - analyse each line to check if it matches our current backend:
* - backend name matches
* - backend id matches if id is forced and name doesn't match
* - if the server pointed by the line is found, then state is applied
*
* If the running backend uuid or id differs from the state file, then HAProxy reports
* a warning.
*
* Grabs the server's lock via srv_update_state().
*/
void apply_server_state(void)
{
char mybuf[SRV_STATE_LINE_MAXLEN];
char *params[SRV_STATE_FILE_MAX_FIELDS] = {0};
char *srv_params[SRV_STATE_FILE_MAX_FIELDS] = {0};
int version, global_file_version;
FILE *f;
char *filepath;
char globalfilepath[MAXPATHLEN + 1];
char localfilepath[MAXPATHLEN + 1];
int len, fileopenerr, globalfilepathlen, localfilepathlen;
struct proxy *curproxy, *bk;
struct server *srv;
char *line;
char *bkname, *srvname;
struct state_line *st;
struct ebmb_node *node, *next_node;
f = NULL;
global_file_version = 0;
globalfilepathlen = 0;
/* create the globalfilepath variable */
if (global.server_state_file) {
/* absolute path or no base directory provided */
if ((global.server_state_file[0] == '/') || (!global.server_state_base)) {
len = strlen(global.server_state_file);
if (len > MAXPATHLEN) {
globalfilepathlen = 0;
goto globalfileerror;
}
memcpy(globalfilepath, global.server_state_file, len);
globalfilepath[len] = '\0';
globalfilepathlen = len;
}
else if (global.server_state_base) {
len = strlen(global.server_state_base);
if (len > MAXPATHLEN) {
globalfilepathlen = 0;
goto globalfileerror;
}
memcpy(globalfilepath, global.server_state_base, len);
globalfilepath[len] = 0;
globalfilepathlen = len;
/* append a slash if needed */
if (!globalfilepathlen || globalfilepath[globalfilepathlen - 1] != '/') {
if (globalfilepathlen + 1 > MAXPATHLEN) {
globalfilepathlen = 0;
goto globalfileerror;
}
globalfilepath[globalfilepathlen++] = '/';
}
len = strlen(global.server_state_file);
if (globalfilepathlen + len > MAXPATHLEN) {
globalfilepathlen = 0;
goto globalfileerror;
}
memcpy(globalfilepath + globalfilepathlen, global.server_state_file, len);
globalfilepathlen += len;
globalfilepath[globalfilepathlen++] = 0;
}
}
globalfileerror:
if (globalfilepathlen == 0)
globalfilepath[0] = '\0';
/* Load global server state in a tree */
if (globalfilepathlen > 0) {
errno = 0;
f = fopen(globalfilepath, "r");
if (errno)
ha_warning("Can't open global server state file '%s': %s\n", globalfilepath, strerror(errno));
if (!f)
goto out_load_server_state_in_tree;
global_file_version = srv_state_get_version(f);
if (global_file_version == 0)
goto out_load_server_state_in_tree;
while (fgets(mybuf, SRV_STATE_LINE_MAXLEN, f)) {
line = NULL;
line = strdup(mybuf);
if (line == NULL)
continue;
srv_state_parse_line(mybuf, global_file_version, params, srv_params);
if (params[0] == NULL)
goto nextline;
/* bkname */
bkname = params[1];
/* srvname */
srvname = params[3];
/* key */
chunk_printf(&trash, "%s %s", bkname, srvname);
/* store line in tree */
st = calloc(1, sizeof(*st) + trash.data + 1);
if (st == NULL) {
goto nextline;
}
memcpy(st->name_name.key, trash.area, trash.data + 1);
if (ebst_insert(&state_file, &st->name_name) != &st->name_name) {
/* this is a duplicate key, probably a hand-crafted file,
* drop it!
*/
goto nextline;
}
/* save line */
st->line = line;
continue;
nextline:
/* free up memory in case of error during the processing of the line */
free(line);
}
}
out_load_server_state_in_tree:
if (f) {
fclose(f);
f = NULL;
}
/* parse all proxies and load states form tree (global file) or from local file */
for (curproxy = proxies_list; curproxy != NULL; curproxy = curproxy->next) {
/* servers are only in backends */
if (!(curproxy->cap & PR_CAP_BE))
continue;
fileopenerr = 0;
filepath = NULL;
/* search server state file path and name */
switch (curproxy->load_server_state_from_file) {
/* read servers state from global file */
case PR_SRV_STATE_FILE_GLOBAL:
/* there was an error while generating global server state file path */
if (globalfilepathlen == 0)
continue;
filepath = globalfilepath;
fileopenerr = 1;
break;
/* this backend has its own file */
case PR_SRV_STATE_FILE_LOCAL:
localfilepathlen = 0;
localfilepath[0] = '\0';
len = 0;
/* create the localfilepath variable */
/* absolute path or no base directory provided */
if ((curproxy->server_state_file_name[0] == '/') || (!global.server_state_base)) {
len = strlen(curproxy->server_state_file_name);
if (len > MAXPATHLEN) {
localfilepathlen = 0;
goto localfileerror;
}
memcpy(localfilepath, curproxy->server_state_file_name, len);
localfilepath[len] = '\0';
localfilepathlen = len;
}
else if (global.server_state_base) {
len = strlen(global.server_state_base);
localfilepathlen += len;
if (localfilepathlen > MAXPATHLEN) {
localfilepathlen = 0;
goto localfileerror;
}
memcpy(localfilepath, global.server_state_base, len);
localfilepath[localfilepathlen] = 0;
/* append a slash if needed */
if (!localfilepathlen || localfilepath[localfilepathlen - 1] != '/') {
if (localfilepathlen + 1 > MAXPATHLEN) {
localfilepathlen = 0;
goto localfileerror;
}
localfilepath[localfilepathlen++] = '/';
}
len = strlen(curproxy->server_state_file_name);
if (localfilepathlen + len > MAXPATHLEN) {
localfilepathlen = 0;
goto localfileerror;
}
memcpy(localfilepath + localfilepathlen, curproxy->server_state_file_name, len);
localfilepathlen += len;
localfilepath[localfilepathlen++] = 0;
}
filepath = localfilepath;
localfileerror:
if (localfilepathlen == 0)
localfilepath[0] = '\0';
break;
case PR_SRV_STATE_FILE_NONE:
default:
continue;
}
/* when global file is used, we get data from the tree
* Note that in such case we don't check backend name neither uuid.
* Backend name can't be wrong since it's used as a key to retrieve the server state
* line from the tree.
*/
if (curproxy->load_server_state_from_file == PR_SRV_STATE_FILE_GLOBAL) {
struct server *srv = curproxy->srv;
while (srv) {
struct ebmb_node *node;
struct state_line *st;
chunk_printf(&trash, "%s %s", curproxy->id, srv->id);
node = ebst_lookup(&state_file, trash.area);
if (!node)
goto next;
st = container_of(node, struct state_line, name_name);
memcpy(mybuf, st->line, strlen(st->line));
mybuf[strlen(st->line)] = 0;
srv_state_parse_line(mybuf, global_file_version, params, srv_params);
if (params[0] == NULL)
goto next;
srv_update_state(srv, global_file_version, srv_params);
next:
srv = srv->next;
}
continue; /* next proxy in list */
}
else {
/* load 'local' state file */
errno = 0;
f = fopen(filepath, "r");
if (errno && fileopenerr)
ha_warning("Can't open server state file '%s': %s\n", filepath, strerror(errno));
if (!f)
continue;
mybuf[0] = '\0';
/* first character of first line of the file must contain the version of the export */
version = srv_state_get_version(f);
if (version == 0) {
ha_warning("Can't get version of the server state file '%s'\n", filepath);
goto fileclose;
}
while (fgets(mybuf, SRV_STATE_LINE_MAXLEN, f)) {
int bk_f_forced_id = 0;
int check_id = 0;
int check_name = 0;
srv_state_parse_line(mybuf, version, params, srv_params);
if (params[0] == NULL) {
continue;
}
/* if line is incomplete line, then ignore it.
* otherwise, update useful flags */
switch (version) {
case 1:
bk_f_forced_id = (atoi(params[15]) & PR_O_FORCED_ID);
check_id = (atoi(params[0]) == curproxy->uuid);
check_name = (strcmp(curproxy->id, params[1]) == 0);
break;
}
bk = curproxy;
/* if backend can't be found, let's continue */
if (!check_id && !check_name)
continue;
else if (!check_id && check_name) {
ha_warning("backend ID mismatch: from server state file: '%s', from running config '%d'\n", params[0], bk->uuid);
send_log(bk, LOG_NOTICE, "backend ID mismatch: from server state file: '%s', from running config '%d'\n", params[0], bk->uuid);
}
else if (check_id && !check_name) {
ha_warning("backend name mismatch: from server state file: '%s', from running config '%s'\n", params[1], bk->id);
send_log(bk, LOG_NOTICE, "backend name mismatch: from server state file: '%s', from running config '%s'\n", params[1], bk->id);
/* if name doesn't match, we still want to update curproxy if the backend id
* was forced in previous the previous configuration */
if (!bk_f_forced_id)
continue;
}
/* look for the server by its name: param[3] */
srv = server_find_best_match(bk, params[3], 0, NULL);
if (!srv) {
/* if no server found, then warning and continue with next line */
ha_warning("can't find server '%s' in backend '%s'\n",
params[3], params[1]);
send_log(bk, LOG_NOTICE, "can't find server '%s' in backend '%s'\n",
params[3], params[1]);
continue;
}
/* now we can proceed with server's state update */
srv_update_state(srv, version, srv_params);
}
fileclose:
fclose(f);
}
}
/* now free memory allocated for the tree */
for (node = ebmb_first(&state_file), next_node = node ? ebmb_next(node) : NULL;
node;
node = next_node, next_node = node ? ebmb_next(node) : NULL) {
st = container_of(node, struct state_line, name_name);
ebmb_delete(&st->name_name);
free(st->line);
free(st);
}
}
/*
* update a server's current IP address.
* ip is a pointer to the new IP address, whose address family is ip_sin_family.
* ip is in network format.
* updater is a string which contains an information about the requester of the update.
* updater is used if not NULL.
*
* A log line and a stderr warning message is generated based on server's backend options.
*
* Must be called with the server lock held.
*/
int update_server_addr(struct server *s, void *ip, int ip_sin_family, const char *updater)
{
/* save the new IP family & address if necessary */
switch (ip_sin_family) {
case AF_INET:
if (s->addr.ss_family == ip_sin_family &&
!memcmp(ip, &((struct sockaddr_in *)&s->addr)->sin_addr.s_addr, 4))
return 0;
break;
case AF_INET6:
if (s->addr.ss_family == ip_sin_family &&
!memcmp(ip, &((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr, 16))
return 0;
break;
};
/* generates a log line and a warning on stderr */
if (1) {
/* book enough space for both IPv4 and IPv6 */
char oldip[INET6_ADDRSTRLEN];
char newip[INET6_ADDRSTRLEN];
memset(oldip, '\0', INET6_ADDRSTRLEN);
memset(newip, '\0', INET6_ADDRSTRLEN);
/* copy old IP address in a string */
switch (s->addr.ss_family) {
case AF_INET:
inet_ntop(s->addr.ss_family, &((struct sockaddr_in *)&s->addr)->sin_addr, oldip, INET_ADDRSTRLEN);
break;
case AF_INET6:
inet_ntop(s->addr.ss_family, &((struct sockaddr_in6 *)&s->addr)->sin6_addr, oldip, INET6_ADDRSTRLEN);
break;
default:
strcpy(oldip, "(none)");
break;
};
/* copy new IP address in a string */
switch (ip_sin_family) {
case AF_INET:
inet_ntop(ip_sin_family, ip, newip, INET_ADDRSTRLEN);
break;
case AF_INET6:
inet_ntop(ip_sin_family, ip, newip, INET6_ADDRSTRLEN);
break;
};
/* save log line into a buffer */
chunk_printf(&trash, "%s/%s changed its IP from %s to %s by %s",
s->proxy->id, s->id, oldip, newip, updater);
/* write the buffer on stderr */
ha_warning("%s.\n", trash.area);
/* send a log */
send_log(s->proxy, LOG_NOTICE, "%s.\n", trash.area);
}
/* save the new IP family */
s->addr.ss_family = ip_sin_family;
/* save the new IP address */
switch (ip_sin_family) {
case AF_INET:
memcpy(&((struct sockaddr_in *)&s->addr)->sin_addr.s_addr, ip, 4);
break;
case AF_INET6:
memcpy(((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr, ip, 16);
break;
};
srv_set_dyncookie(s);
srv_set_addr_desc(s);
return 0;
}
/*
* This function update a server's addr and port only for AF_INET and AF_INET6 families.
*
* Caller can pass its name through <updater> to get it integrated in the response message
* returned by the function.
*
* The function first does the following, in that order:
* - validates the new addr and/or port
* - checks if an update is required (new IP or port is different than current ones)
* - checks the update is allowed:
* - don't switch from/to a family other than AF_INET4 and AF_INET6
* - allow all changes if no CHECKS are configured
* - if CHECK is configured:
* - if switch to port map (SRV_F_MAPPORTS), ensure health check have their own ports
* - applies required changes to both ADDR and PORT if both 'required' and 'allowed'
* conditions are met
*
* Must be called with the server lock held.
*/
const char *update_server_addr_port(struct server *s, const char *addr, const char *port, char *updater)
{
struct sockaddr_storage sa;
int ret, port_change_required;
char current_addr[INET6_ADDRSTRLEN];
uint16_t current_port, new_port;
struct buffer *msg;
int changed = 0;
msg = get_trash_chunk();
chunk_reset(msg);
if (addr) {
memset(&sa, 0, sizeof(struct sockaddr_storage));
if (str2ip2(addr, &sa, 0) == NULL) {
chunk_printf(msg, "Invalid addr '%s'", addr);
goto out;
}
/* changes are allowed on AF_INET* families only */
if ((sa.ss_family != AF_INET) && (sa.ss_family != AF_INET6)) {
chunk_printf(msg, "Update to families other than AF_INET and AF_INET6 supported only through configuration file");
goto out;
}
/* collecting data currently setup */
memset(current_addr, '\0', sizeof(current_addr));
ret = addr_to_str(&s->addr, current_addr, sizeof(current_addr));
/* changes are allowed on AF_INET* families only */
if ((ret != AF_INET) && (ret != AF_INET6)) {
chunk_printf(msg, "Update for the current server address family is only supported through configuration file");
goto out;
}
/* applying ADDR changes if required and allowed
* ipcmp returns 0 when both ADDR are the same
*/
if (ipcmp(&s->addr, &sa) == 0) {
chunk_appendf(msg, "no need to change the addr");
goto port;
}
ipcpy(&sa, &s->addr);
changed = 1;
/* we also need to update check's ADDR only if it uses the server's one */
if ((s->check.state & CHK_ST_CONFIGURED) && (s->flags & SRV_F_CHECKADDR)) {
ipcpy(&sa, &s->check.addr);
}
/* we also need to update agent ADDR only if it use the server's one */
if ((s->agent.state & CHK_ST_CONFIGURED) && (s->flags & SRV_F_AGENTADDR)) {
ipcpy(&sa, &s->agent.addr);
}
/* update report for caller */
chunk_printf(msg, "IP changed from '%s' to '%s'", current_addr, addr);
}
port:
if (port) {
char sign = '\0';
char *endptr;
if (addr)
chunk_appendf(msg, ", ");
/* collecting data currently setup */
current_port = s->svc_port;
/* check if PORT change is required */
port_change_required = 0;
sign = *port;
errno = 0;
new_port = strtol(port, &endptr, 10);
if ((errno != 0) || (port == endptr)) {
chunk_appendf(msg, "problem converting port '%s' to an int", port);
goto out;
}
/* check if caller triggers a port mapped or offset */
if (sign == '-' || (sign == '+')) {
/* check if server currently uses port map */
if (!(s->flags & SRV_F_MAPPORTS)) {
/* switch from fixed port to port map mandatorily triggers
* a port change */
port_change_required = 1;
/* check is configured
* we're switching from a fixed port to a SRV_F_MAPPORTS (mapped) port
* prevent PORT change if check doesn't have it's dedicated port while switching
* to port mapping */
if ((s->check.state & CHK_ST_CONFIGURED) && !(s->flags & SRV_F_CHECKPORT)) {
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.");
goto out;
}
}
/* we're already using port maps */
else {
port_change_required = current_port != new_port;
}
}
/* fixed port */
else {
port_change_required = current_port != new_port;
}
/* applying PORT changes if required and update response message */
if (port_change_required) {
/* apply new port */
s->svc_port = new_port;
changed = 1;
/* prepare message */
chunk_appendf(msg, "port changed from '");
if (s->flags & SRV_F_MAPPORTS)
chunk_appendf(msg, "+");
chunk_appendf(msg, "%d' to '", current_port);
if (sign == '-') {
s->flags |= SRV_F_MAPPORTS;
chunk_appendf(msg, "%c", sign);
/* just use for result output */
new_port = -new_port;
}
else if (sign == '+') {
s->flags |= SRV_F_MAPPORTS;
chunk_appendf(msg, "%c", sign);
}
else {
s->flags &= ~SRV_F_MAPPORTS;
}
chunk_appendf(msg, "%d'", new_port);
/* we also need to update health checks port only if it uses server's realport */
if ((s->check.state & CHK_ST_CONFIGURED) && !(s->flags & SRV_F_CHECKPORT)) {
s->check.port = new_port;
}
}
else {
chunk_appendf(msg, "no need to change the port");
}
}
out:
if (changed) {
/* force connection cleanup on the given server */
srv_cleanup_connections(s);
srv_set_dyncookie(s);
srv_set_addr_desc(s);
}
if (updater)
chunk_appendf(msg, " by '%s'", updater);
chunk_appendf(msg, "\n");
return msg->area;
}
/*
* update server status based on result of name resolution
* returns:
* 0 if server status is updated
* 1 if server status has not changed
*
* Must be called with the server lock held.
*/
int snr_update_srv_status(struct server *s, int has_no_ip)
{
struct dns_resolvers *resolvers = s->resolvers;
struct dns_resolution *resolution = s->dns_requester->resolution;
int exp;
/* If resolution is NULL we're dealing with SRV records Additional records */
if (resolution == NULL) {
/* since this server has an IP, it can go back in production */
if (has_no_ip == 0) {
srv_clr_admin_flag(s, SRV_ADMF_RMAINT);
return 1;
}
if (s->next_admin & SRV_ADMF_RMAINT)
return 1;
srv_set_admin_flag(s, SRV_ADMF_RMAINT, "entry removed from SRV record");
return 0;
}
switch (resolution->status) {
case RSLV_STATUS_NONE:
/* status when HAProxy has just (re)started.
* Nothing to do, since the task is already automatically started */
break;
case RSLV_STATUS_VALID:
/*
* resume health checks
* server will be turned back on if health check is safe
*/
if (has_no_ip) {
if (s->next_admin & SRV_ADMF_RMAINT)
return 1;
srv_set_admin_flag(s, SRV_ADMF_RMAINT,
"No IP for server ");
return 0;
}
if (!(s->next_admin & SRV_ADMF_RMAINT))
return 1;
srv_clr_admin_flag(s, SRV_ADMF_RMAINT);
chunk_printf(&trash, "Server %s/%s administratively READY thanks to valid DNS answer",
s->proxy->id, s->id);
ha_warning("%s.\n", trash.area);
send_log(s->proxy, LOG_NOTICE, "%s.\n", trash.area);
return 0;
case RSLV_STATUS_NX:
/* stop server if resolution is NX for a long enough period */
exp = tick_add(resolution->last_valid, resolvers->hold.nx);
if (!tick_is_expired(exp, now_ms))
break;
if (s->next_admin & SRV_ADMF_RMAINT)
return 1;
srv_set_admin_flag(s, SRV_ADMF_RMAINT, "DNS NX status");
return 0;
case RSLV_STATUS_TIMEOUT:
/* stop server if resolution is TIMEOUT for a long enough period */
exp = tick_add(resolution->last_valid, resolvers->hold.timeout);
if (!tick_is_expired(exp, now_ms))
break;
if (s->next_admin & SRV_ADMF_RMAINT)
return 1;
srv_set_admin_flag(s, SRV_ADMF_RMAINT, "DNS timeout status");
return 0;
case RSLV_STATUS_REFUSED:
/* stop server if resolution is REFUSED for a long enough period */
exp = tick_add(resolution->last_valid, resolvers->hold.refused);
if (!tick_is_expired(exp, now_ms))
break;
if (s->next_admin & SRV_ADMF_RMAINT)
return 1;
srv_set_admin_flag(s, SRV_ADMF_RMAINT, "DNS refused status");
return 0;
default:
/* stop server if resolution failed for a long enough period */
exp = tick_add(resolution->last_valid, resolvers->hold.other);
if (!tick_is_expired(exp, now_ms))
break;
if (s->next_admin & SRV_ADMF_RMAINT)
return 1;
srv_set_admin_flag(s, SRV_ADMF_RMAINT, "unspecified DNS error");
return 0;
}
return 1;
}
/*
* Server Name Resolution valid response callback
* It expects:
* - <nameserver>: the name server which answered the valid response
* - <response>: buffer containing a valid DNS response
* - <response_len>: size of <response>
* It performs the following actions:
* - ignore response if current ip found and server family not met
* - update with first new ip found if family is met and current IP is not found
* returns:
* 0 on error
* 1 when no error or safe ignore
*
* Must be called with server lock held
*/
int snr_resolution_cb(struct dns_requester *requester, struct dns_nameserver *nameserver)
{
struct server *s = NULL;
struct dns_resolution *resolution = NULL;
void *serverip, *firstip;
short server_sin_family, firstip_sin_family;
int ret;
struct buffer *chk = get_trash_chunk();
int has_no_ip = 0;
s = objt_server(requester->owner);
if (!s)
return 1;
resolution = s->dns_requester->resolution;
/* initializing variables */
firstip = NULL; /* pointer to the first valid response found */
/* it will be used as the new IP if a change is required */
firstip_sin_family = AF_UNSPEC;
serverip = NULL; /* current server IP address */
/* initializing server IP pointer */
server_sin_family = s->addr.ss_family;
switch (server_sin_family) {
case AF_INET:
serverip = &((struct sockaddr_in *)&s->addr)->sin_addr.s_addr;
break;
case AF_INET6:
serverip = &((struct sockaddr_in6 *)&s->addr)->sin6_addr.s6_addr;
break;
case AF_UNSPEC:
break;
default:
goto invalid;
}
ret = dns_get_ip_from_response(&resolution->response, &s->dns_opts,
serverip, server_sin_family, &firstip,
&firstip_sin_family, s);
switch (ret) {
case DNS_UPD_NO:
goto update_status;
case DNS_UPD_SRVIP_NOT_FOUND:
goto save_ip;
case DNS_UPD_CNAME:
goto invalid;
case DNS_UPD_NO_IP_FOUND:
has_no_ip = 1;
goto update_status;
case DNS_UPD_NAME_ERROR:
/* update resolution status to OTHER error type */
resolution->status = RSLV_STATUS_OTHER;
goto update_status;
default:
goto invalid;
}
save_ip:
if (nameserver) {
nameserver->counters->update++;
/* save the first ip we found */
chunk_printf(chk, "%s/%s", nameserver->resolvers->id, nameserver->id);
}
else
chunk_printf(chk, "DNS cache");
update_server_addr(s, firstip, firstip_sin_family, (char *) chk->area);
update_status:
snr_update_srv_status(s, has_no_ip);
return 1;
invalid:
if (nameserver) {
nameserver->counters->invalid++;
goto update_status;
}
snr_update_srv_status(s, has_no_ip);
return 0;
}
/*
* Server Name Resolution error management callback
* returns:
* 0 on error
* 1 when no error or safe ignore
*
* Grabs the server's lock.
*/
int snr_resolution_error_cb(struct dns_requester *requester, int error_code)
{
struct server *s;
s = objt_server(requester->owner);
if (!s)
return 1;
HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
snr_update_srv_status(s, 0);
HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
return 1;
}
/*
* Function to check if <ip> is already affected to a server in the backend
* which owns <srv> and is up.
* It returns a pointer to the first server found or NULL if <ip> is not yet
* assigned.
*
* Must be called with server lock held
*/
struct server *snr_check_ip_callback(struct server *srv, void *ip, unsigned char *ip_family)
{
struct server *tmpsrv;
struct proxy *be;
if (!srv)
return NULL;
be = srv->proxy;
for (tmpsrv = be->srv; tmpsrv; tmpsrv = tmpsrv->next) {
/* we found the current server is the same, ignore it */
if (srv == tmpsrv)
continue;
/* We want to compare the IP in the record with the IP of the servers in the
* same backend, only if:
* * DNS resolution is enabled on the server
* * the hostname used for the resolution by our server is the same than the
* one used for the server found in the backend
* * the server found in the backend is not our current server
*/
HA_SPIN_LOCK(SERVER_LOCK, &tmpsrv->lock);
if ((tmpsrv->hostname_dn == NULL) ||
(srv->hostname_dn_len != tmpsrv->hostname_dn_len) ||
(strcmp(srv->hostname_dn, tmpsrv->hostname_dn) != 0) ||
(srv->puid == tmpsrv->puid)) {
HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
continue;
}
/* If the server has been taken down, don't consider it */
if (tmpsrv->next_admin & SRV_ADMF_RMAINT) {
HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
continue;
}
/* At this point, we have 2 different servers using the same DNS hostname
* for their respective resolution.
*/
if (*ip_family == tmpsrv->addr.ss_family &&
((tmpsrv->addr.ss_family == AF_INET &&
memcmp(ip, &((struct sockaddr_in *)&tmpsrv->addr)->sin_addr, 4) == 0) ||
(tmpsrv->addr.ss_family == AF_INET6 &&
memcmp(ip, &((struct sockaddr_in6 *)&tmpsrv->addr)->sin6_addr, 16) == 0))) {
HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
return tmpsrv;
}
HA_SPIN_UNLOCK(SERVER_LOCK, &tmpsrv->lock);
}
return NULL;
}
/* Sets the server's address (srv->addr) from srv->hostname using the libc's
* resolver. This is suited for initial address configuration. Returns 0 on
* success otherwise a non-zero error code. In case of error, *err_code, if
* not NULL, is filled up.
*/
int srv_set_addr_via_libc(struct server *srv, int *err_code)
{
if (str2ip2(srv->hostname, &srv->addr, 1) == NULL) {
if (err_code)
*err_code |= ERR_WARN;
return 1;
}
return 0;
}
/* Set the server's FDQN (->hostname) from <hostname>.
* Returns -1 if failed, 0 if not.
*
* Must be called with the server lock held.
*/
int srv_set_fqdn(struct server *srv, const char *hostname, int dns_locked)
{
struct dns_resolution *resolution;
char *hostname_dn;
int hostname_len, hostname_dn_len;
/* Note that the server lock is already held. */
if (!srv->resolvers)
return -1;
if (!dns_locked)
HA_SPIN_LOCK(DNS_LOCK, &srv->resolvers->lock);
/* run time DNS resolution was not active for this server
* and we can't enable it at run time for now.
*/
if (!srv->dns_requester)
goto err;
chunk_reset(&trash);
hostname_len = strlen(hostname);
hostname_dn = trash.area;
hostname_dn_len = dns_str_to_dn_label(hostname, hostname_len + 1,
hostname_dn, trash.size);
if (hostname_dn_len == -1)
goto err;
resolution = srv->dns_requester->resolution;
if (resolution &&
resolution->hostname_dn &&
strcmp(resolution->hostname_dn, hostname_dn) == 0)
goto end;
dns_unlink_resolution(srv->dns_requester);
free(srv->hostname);
free(srv->hostname_dn);
srv->hostname = strdup(hostname);
srv->hostname_dn = strdup(hostname_dn);
srv->hostname_dn_len = hostname_dn_len;
if (!srv->hostname || !srv->hostname_dn)
goto err;
if (srv->flags & SRV_F_NO_RESOLUTION)
goto end;
if (dns_link_resolution(srv, OBJ_TYPE_SERVER, 1) == -1)
goto err;
end:
if (!dns_locked)
HA_SPIN_UNLOCK(DNS_LOCK, &srv->resolvers->lock);
return 0;
err:
if (!dns_locked)
HA_SPIN_UNLOCK(DNS_LOCK, &srv->resolvers->lock);
return -1;
}
/* Sets the server's address (srv->addr) from srv->lastaddr which was filled
* from the state file. This is suited for initial address configuration.
* Returns 0 on success otherwise a non-zero error code. In case of error,
* *err_code, if not NULL, is filled up.
*/
static int srv_apply_lastaddr(struct server *srv, int *err_code)
{
if (!str2ip2(srv->lastaddr, &srv->addr, 0)) {
if (err_code)
*err_code |= ERR_WARN;
return 1;
}
return 0;
}
/* returns 0 if no error, otherwise a combination of ERR_* flags */
static int srv_iterate_initaddr(struct server *srv)
{
char *name = srv->hostname;
int return_code = 0;
int err_code;
unsigned int methods;
/* If no addr and no hostname set, get the name from the DNS SRV request */
if (!name && srv->srvrq)
name = srv->srvrq->name;
methods = srv->init_addr_methods;
if (!methods) {
/* otherwise default to "last,libc" */
srv_append_initaddr(&methods, SRV_IADDR_LAST);
srv_append_initaddr(&methods, SRV_IADDR_LIBC);
if (srv->resolvers_id) {
/* dns resolution is configured, add "none" to not fail on startup */
srv_append_initaddr(&methods, SRV_IADDR_NONE);
}
}
/* "-dr" : always append "none" so that server addresses resolution
* failures are silently ignored, this is convenient to validate some
* configs out of their environment.
*/
if (global.tune.options & GTUNE_RESOLVE_DONTFAIL)
srv_append_initaddr(&methods, SRV_IADDR_NONE);
while (methods) {
err_code = 0;
switch (srv_get_next_initaddr(&methods)) {
case SRV_IADDR_LAST:
if (!srv->lastaddr)
continue;
if (srv_apply_lastaddr(srv, &err_code) == 0)
goto out;
return_code |= err_code;
break;
case SRV_IADDR_LIBC:
if (!srv->hostname)
continue;
if (srv_set_addr_via_libc(srv, &err_code) == 0)
goto out;
return_code |= err_code;
break;
case SRV_IADDR_NONE:
srv_set_admin_flag(srv, SRV_ADMF_RMAINT, NULL);
if (return_code) {
ha_warning("parsing [%s:%d] : 'server %s' : could not resolve address '%s', disabling server.\n",
srv->conf.file, srv->conf.line, srv->id, name);
}
return return_code;
case SRV_IADDR_IP:
ipcpy(&srv->init_addr, &srv->addr);
if (return_code) {
ha_warning("parsing [%s:%d] : 'server %s' : could not resolve address '%s', falling back to configured address.\n",
srv->conf.file, srv->conf.line, srv->id, name);
}
goto out;
default: /* unhandled method */
break;
}
}
if (!return_code) {
ha_alert("parsing [%s:%d] : 'server %s' : no method found to resolve address '%s'\n",
srv->conf.file, srv->conf.line, srv->id, name);
}
else {
ha_alert("parsing [%s:%d] : 'server %s' : could not resolve address '%s'.\n",
srv->conf.file, srv->conf.line, srv->id, name);
}
return_code |= ERR_ALERT | ERR_FATAL;
return return_code;
out:
srv_set_dyncookie(srv);
srv_set_addr_desc(srv);
return return_code;
}
/*
* This function parses all backends and all servers within each backend
* and performs servers' addr resolution based on information provided by:
* - configuration file
* - server-state file (states provided by an 'old' haproxy process)
*
* Returns 0 if no error, otherwise, a combination of ERR_ flags.
*/
int srv_init_addr(void)
{
struct proxy *curproxy;
int return_code = 0;
curproxy = proxies_list;
while (curproxy) {
struct server *srv;
/* servers are in backend only */
if (!(curproxy->cap & PR_CAP_BE))
goto srv_init_addr_next;
for (srv = curproxy->srv; srv; srv = srv->next)
if (srv->hostname || srv->srvrq)
return_code |= srv_iterate_initaddr(srv);
srv_init_addr_next:
curproxy = curproxy->next;
}
return return_code;
}
/*
* Must be called with the server lock held.
*/
const char *update_server_fqdn(struct server *server, const char *fqdn, const char *updater, int dns_locked)
{
struct buffer *msg;
msg = get_trash_chunk();
chunk_reset(msg);
if (server->hostname && strcmp(fqdn, server->hostname) == 0) {
chunk_appendf(msg, "no need to change the FDQN");
goto out;
}
if (strlen(fqdn) > DNS_MAX_NAME_SIZE || invalid_domainchar(fqdn)) {
chunk_appendf(msg, "invalid fqdn '%s'", fqdn);
goto out;
}
chunk_appendf(msg, "%s/%s changed its FQDN from %s to %s",
server->proxy->id, server->id, server->hostname, fqdn);
if (srv_set_fqdn(server, fqdn, dns_locked) < 0) {
chunk_reset(msg);
chunk_appendf(msg, "could not update %s/%s FQDN",
server->proxy->id, server->id);
goto out;
}
/* Flag as FQDN set from stats socket. */
server->next_admin |= SRV_ADMF_HMAINT;
out:
if (updater)
chunk_appendf(msg, " by '%s'", updater);
chunk_appendf(msg, "\n");
return msg->area;
}
/* Expects to find a backend and a server in <arg> under the form <backend>/<server>,
* and returns the pointer to the server. Otherwise, display adequate error messages
* on the CLI, sets the CLI's state to CLI_ST_PRINT and returns NULL. This is only
* used for CLI commands requiring a server name.
* Important: the <arg> is modified to remove the '/'.
*/
struct server *cli_find_server(struct appctx *appctx, char *arg)
{
struct proxy *px;
struct server *sv;
char *line;
/* split "backend/server" and make <line> point to server */
for (line = arg; *line; line++)
if (*line == '/') {
*line++ = '\0';
break;
}
if (!*line || !*arg) {
cli_err(appctx, "Require 'backend/server'.\n");
return NULL;
}
if (!get_backend_server(arg, line, &px, &sv)) {
cli_err(appctx, px ? "No such server.\n" : "No such backend.\n");
return NULL;
}
if (px->disabled) {
cli_err(appctx, "Proxy is disabled.\n");
return NULL;
}
return sv;
}
/* grabs the server lock */
static int cli_parse_set_server(char **args, char *payload, struct appctx *appctx, void *private)
{
struct server *sv;
const char *warning;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
sv = cli_find_server(appctx, args[2]);
if (!sv)
return 1;
HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
if (strcmp(args[3], "weight") == 0) {
warning = server_parse_weight_change_request(sv, args[4]);
if (warning)
cli_err(appctx, warning);
}
else if (strcmp(args[3], "state") == 0) {
if (strcmp(args[4], "ready") == 0)
srv_adm_set_ready(sv);
else if (strcmp(args[4], "drain") == 0)
srv_adm_set_drain(sv);
else if (strcmp(args[4], "maint") == 0)
srv_adm_set_maint(sv);
else
cli_err(appctx, "'set server <srv> state' expects 'ready', 'drain' and 'maint'.\n");
}
else if (strcmp(args[3], "health") == 0) {
if (sv->track)
cli_err(appctx, "cannot change health on a tracking server.\n");
else if (strcmp(args[4], "up") == 0) {
sv->check.health = sv->check.rise + sv->check.fall - 1;
srv_set_running(sv, "changed from CLI", NULL);
}
else if (strcmp(args[4], "stopping") == 0) {
sv->check.health = sv->check.rise + sv->check.fall - 1;
srv_set_stopping(sv, "changed from CLI", NULL);
}
else if (strcmp(args[4], "down") == 0) {
sv->check.health = 0;
srv_set_stopped(sv, "changed from CLI", NULL);
}
else
cli_err(appctx, "'set server <srv> health' expects 'up', 'stopping', or 'down'.\n");
}
else if (strcmp(args[3], "agent") == 0) {
if (!(sv->agent.state & CHK_ST_ENABLED))
cli_err(appctx, "agent checks are not enabled on this server.\n");
else if (strcmp(args[4], "up") == 0) {
sv->agent.health = sv->agent.rise + sv->agent.fall - 1;
srv_set_running(sv, "changed from CLI", NULL);
}
else if (strcmp(args[4], "down") == 0) {
sv->agent.health = 0;
srv_set_stopped(sv, "changed from CLI", NULL);
}
else
cli_err(appctx, "'set server <srv> agent' expects 'up' or 'down'.\n");
}
else if (strcmp(args[3], "agent-addr") == 0) {
if (!(sv->agent.state & CHK_ST_ENABLED))
cli_err(appctx, "agent checks are not enabled on this server.\n");
else if (str2ip(args[4], &sv->agent.addr) == NULL)
cli_err(appctx, "incorrect addr address given for agent.\n");
}
else if (strcmp(args[3], "agent-send") == 0) {
if (!(sv->agent.state & CHK_ST_ENABLED))
cli_err(appctx, "agent checks are not enabled on this server.\n");
else {
if (!set_srv_agent_send(sv, args[4]))
cli_err(appctx, "cannot allocate memory for new string.\n");
}
}
else if (strcmp(args[3], "check-port") == 0) {
int i = 0;
if (strl2irc(args[4], strlen(args[4]), &i) != 0) {
cli_err(appctx, "'set server <srv> check-port' expects an integer as argument.\n");
goto out_unlock;
}
if ((i < 0) || (i > 65535)) {
cli_err(appctx, "provided port is not valid.\n");
goto out_unlock;
}
/* prevent the update of port to 0 if MAPPORTS are in use */
if ((sv->flags & SRV_F_MAPPORTS) && (i == 0)) {
cli_err(appctx, "can't unset 'port' since MAPPORTS is in use.\n");
goto out_unlock;
}
sv->check.port = i;
cli_msg(appctx, LOG_NOTICE, "health check port updated.\n");
}
else if (strcmp(args[3], "addr") == 0) {
char *addr = NULL;
char *port = NULL;
if (strlen(args[4]) == 0) {
cli_err(appctx, "set server <b>/<s> addr requires an address and optionally a port.\n");
goto out_unlock;
}
else {
addr = args[4];
}
if (strcmp(args[5], "port") == 0) {
port = args[6];
}
warning = update_server_addr_port(sv, addr, port, "stats socket command");
if (warning)
cli_msg(appctx, LOG_WARNING, warning);
srv_clr_admin_flag(sv, SRV_ADMF_RMAINT);
}
else if (strcmp(args[3], "fqdn") == 0) {
if (!*args[4]) {
cli_err(appctx, "set server <b>/<s> fqdn requires a FQDN.\n");
goto out_unlock;
}
/* ensure runtime resolver will process this new fqdn */
if (sv->flags & SRV_F_NO_RESOLUTION) {
sv->flags &= ~SRV_F_NO_RESOLUTION;
}
warning = update_server_fqdn(sv, args[4], "stats socket command", 0);
if (warning)
cli_msg(appctx, LOG_WARNING, warning);
}
else if (strcmp(args[3], "ssl") == 0) {
#ifdef USE_OPENSSL
if (sv->ssl_ctx.ctx == NULL) {
cli_err(appctx, "'set server <srv> ssl' cannot be set. "
" default-server should define ssl settings\n");
goto out_unlock;
} else if (strcmp(args[4], "on") == 0) {
ssl_sock_set_srv(sv, 1);
} else if (strcmp(args[4], "off") == 0) {
ssl_sock_set_srv(sv, 0);
} else {
cli_err(appctx, "'set server <srv> ssl' expects 'on' or 'off'.\n");
goto out_unlock;
}
srv_cleanup_connections(sv);
cli_msg(appctx, LOG_NOTICE, "server ssl setting updated.\n");
#else
cli_msg(appctx, LOG_NOTICE, "server ssl setting not supported.\n");
#endif
} else {
cli_err(appctx,
"'set server <srv>' only supports 'agent', 'health', 'state',"
" 'weight', 'addr', 'fqdn', 'check-port' and 'ssl'.\n");
}
out_unlock:
HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
return 1;
}
static int cli_parse_get_weight(char **args, char *payload, struct appctx *appctx, void *private)
{
struct stream_interface *si = appctx->owner;
struct proxy *px;
struct server *sv;
char *line;
/* split "backend/server" and make <line> point to server */
for (line = args[2]; *line; line++)
if (*line == '/') {
*line++ = '\0';
break;
}
if (!*line)
return cli_err(appctx, "Require 'backend/server'.\n");
if (!get_backend_server(args[2], line, &px, &sv))
return cli_err(appctx, px ? "No such server.\n" : "No such backend.\n");
/* return server's effective weight at the moment */
snprintf(trash.area, trash.size, "%d (initial %d)\n", sv->uweight,
sv->iweight);
if (ci_putstr(si_ic(si), trash.area) == -1) {
si_rx_room_blk(si);
return 0;
}
return 1;
}
/* Parse a "set weight" command.
*
* Grabs the server lock.
*/
static int cli_parse_set_weight(char **args, char *payload, struct appctx *appctx, void *private)
{
struct server *sv;
const char *warning;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
sv = cli_find_server(appctx, args[2]);
if (!sv)
return 1;
HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
warning = server_parse_weight_change_request(sv, args[3]);
if (warning)
cli_err(appctx, warning);
HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
return 1;
}
/* parse a "set maxconn server" command. It always returns 1.
*
* Grabs the server lock.
*/
static int cli_parse_set_maxconn_server(char **args, char *payload, struct appctx *appctx, void *private)
{
struct server *sv;
const char *warning;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
sv = cli_find_server(appctx, args[3]);
if (!sv)
return 1;
HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
warning = server_parse_maxconn_change_request(sv, args[4]);
if (warning)
cli_err(appctx, warning);
HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
return 1;
}
/* parse a "disable agent" command. It always returns 1.
*
* Grabs the server lock.
*/
static int cli_parse_disable_agent(char **args, char *payload, struct appctx *appctx, void *private)
{
struct server *sv;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
sv = cli_find_server(appctx, args[2]);
if (!sv)
return 1;
HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
sv->agent.state &= ~CHK_ST_ENABLED;
HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
return 1;
}
/* parse a "disable health" command. It always returns 1.
*
* Grabs the server lock.
*/
static int cli_parse_disable_health(char **args, char *payload, struct appctx *appctx, void *private)
{
struct server *sv;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
sv = cli_find_server(appctx, args[2]);
if (!sv)
return 1;
HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
sv->check.state &= ~CHK_ST_ENABLED;
HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
return 1;
}
/* parse a "disable server" command. It always returns 1.
*
* Grabs the server lock.
*/
static int cli_parse_disable_server(char **args, char *payload, struct appctx *appctx, void *private)
{
struct server *sv;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
sv = cli_find_server(appctx, args[2]);
if (!sv)
return 1;
HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
srv_adm_set_maint(sv);
HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
return 1;
}
/* parse a "enable agent" command. It always returns 1.
*
* Grabs the server lock.
*/
static int cli_parse_enable_agent(char **args, char *payload, struct appctx *appctx, void *private)
{
struct server *sv;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
sv = cli_find_server(appctx, args[2]);
if (!sv)
return 1;
if (!(sv->agent.state & CHK_ST_CONFIGURED))
return cli_err(appctx, "Agent was not configured on this server, cannot enable.\n");
HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
sv->agent.state |= CHK_ST_ENABLED;
HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
return 1;
}
/* parse a "enable health" command. It always returns 1.
*
* Grabs the server lock.
*/
static int cli_parse_enable_health(char **args, char *payload, struct appctx *appctx, void *private)
{
struct server *sv;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
sv = cli_find_server(appctx, args[2]);
if (!sv)
return 1;
HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
sv->check.state |= CHK_ST_ENABLED;
HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
return 1;
}
/* parse a "enable server" command. It always returns 1.
*
* Grabs the server lock.
*/
static int cli_parse_enable_server(char **args, char *payload, struct appctx *appctx, void *private)
{
struct server *sv;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
sv = cli_find_server(appctx, args[2]);
if (!sv)
return 1;
HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
srv_adm_set_ready(sv);
if (!(sv->flags & SRV_F_COOKIESET)
&& (sv->proxy->ck_opts & PR_CK_DYNAMIC) &&
sv->cookie)
srv_check_for_dup_dyncookie(sv);
HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
return 1;
}
/* register cli keywords */
static struct cli_kw_list cli_kws = {{ },{
{ { "disable", "agent", NULL }, "disable agent : disable agent checks (use 'set server' instead)", cli_parse_disable_agent, NULL },
{ { "disable", "health", NULL }, "disable health : disable health checks (use 'set server' instead)", cli_parse_disable_health, NULL },
{ { "disable", "server", NULL }, "disable server : disable a server for maintenance (use 'set server' instead)", cli_parse_disable_server, NULL },
{ { "enable", "agent", NULL }, "enable agent : enable agent checks (use 'set server' instead)", cli_parse_enable_agent, NULL },
{ { "enable", "health", NULL }, "enable health : enable health checks (use 'set server' instead)", cli_parse_enable_health, NULL },
{ { "enable", "server", NULL }, "enable server : enable a disabled server (use 'set server' instead)", cli_parse_enable_server, NULL },
{ { "set", "maxconn", "server", NULL }, "set maxconn server : change a server's maxconn setting", cli_parse_set_maxconn_server, NULL },
{ { "set", "server", NULL }, "set server : change a server's state, weight, address or ssl", cli_parse_set_server },
{ { "get", "weight", NULL }, "get weight : report a server's current weight", cli_parse_get_weight },
{ { "set", "weight", NULL }, "set weight : change a server's weight (deprecated)", cli_parse_set_weight },
{{},}
}};
INITCALL1(STG_REGISTER, cli_register_kw, &cli_kws);
/*
* This function applies server's status changes, it is
* is designed to be called asynchronously.
*
* Must be called with the server lock held. This may also be called at init
* time as the result of parsing the state file, in which case no lock will be
* held, and the server's warmup task can be null.
*/
static void srv_update_status(struct server *s)
{
struct check *check = &s->check;
int xferred;
struct proxy *px = s->proxy;
int prev_srv_count = s->proxy->srv_bck + s->proxy->srv_act;
int srv_was_stopping = (s->cur_state == SRV_ST_STOPPING) || (s->cur_admin & SRV_ADMF_DRAIN);
int log_level;
struct buffer *tmptrash = NULL;
/* If currently main is not set we try to apply pending state changes */
if (!(s->cur_admin & SRV_ADMF_MAINT)) {
int next_admin;
/* Backup next admin */
next_admin = s->next_admin;
/* restore current admin state */
s->next_admin = s->cur_admin;
if ((s->cur_state != SRV_ST_STOPPED) && (s->next_state == SRV_ST_STOPPED)) {
s->last_change = now.tv_sec;
if (s->proxy->lbprm.set_server_status_down)
s->proxy->lbprm.set_server_status_down(s);
if (s->onmarkeddown & HANA_ONMARKEDDOWN_SHUTDOWNSESSIONS)
srv_shutdown_streams(s, SF_ERR_DOWN);
/* we might have streams queued on this server and waiting for
* a connection. Those which are redispatchable will be queued
* to another server or to the proxy itself.
*/
xferred = pendconn_redistribute(s);
tmptrash = alloc_trash_chunk();
if (tmptrash) {
chunk_printf(tmptrash,
"%sServer %s/%s is DOWN", s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id);
srv_append_status(tmptrash, s, NULL, xferred, 0);
ha_warning("%s.\n", tmptrash->area);
/* we don't send an alert if the server was previously paused */
log_level = srv_was_stopping ? LOG_NOTICE : LOG_ALERT;
send_log(s->proxy, log_level, "%s.\n",
tmptrash->area);
send_email_alert(s, log_level, "%s",
tmptrash->area);
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
set_backend_down(s->proxy);
s->counters.down_trans++;
}
else if ((s->cur_state != SRV_ST_STOPPING) && (s->next_state == SRV_ST_STOPPING)) {
s->last_change = now.tv_sec;
if (s->proxy->lbprm.set_server_status_down)
s->proxy->lbprm.set_server_status_down(s);
/* we might have streams queued on this server and waiting for
* a connection. Those which are redispatchable will be queued
* to another server or to the proxy itself.
*/
xferred = pendconn_redistribute(s);
tmptrash = alloc_trash_chunk();
if (tmptrash) {
chunk_printf(tmptrash,
"%sServer %s/%s is stopping", s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id);
srv_append_status(tmptrash, s, NULL, xferred, 0);
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, LOG_NOTICE, "%s.\n",
tmptrash->area);
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
set_backend_down(s->proxy);
}
else if (((s->cur_state != SRV_ST_RUNNING) && (s->next_state == SRV_ST_RUNNING))
|| ((s->cur_state != SRV_ST_STARTING) && (s->next_state == SRV_ST_STARTING))) {
if (s->proxy->srv_bck == 0 && s->proxy->srv_act == 0) {
if (s->proxy->last_change < now.tv_sec) // ignore negative times
s->proxy->down_time += now.tv_sec - s->proxy->last_change;
s->proxy->last_change = now.tv_sec;
}
if (s->cur_state == SRV_ST_STOPPED && s->last_change < now.tv_sec) // ignore negative times
s->down_time += now.tv_sec - s->last_change;
s->last_change = now.tv_sec;
if (s->next_state == SRV_ST_STARTING && s->warmup)
task_schedule(s->warmup, tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20))));
server_recalc_eweight(s, 0);
/* now propagate the status change to any LB algorithms */
if (px->lbprm.update_server_eweight)
px->lbprm.update_server_eweight(s);
else if (srv_willbe_usable(s)) {
if (px->lbprm.set_server_status_up)
px->lbprm.set_server_status_up(s);
}
else {
if (px->lbprm.set_server_status_down)
px->lbprm.set_server_status_down(s);
}
/* If the server is set with "on-marked-up shutdown-backup-sessions",
* and it's not a backup server and its effective weight is > 0,
* then it can accept new connections, so we shut down all streams
* on all backup servers.
*/
if ((s->onmarkedup & HANA_ONMARKEDUP_SHUTDOWNBACKUPSESSIONS) &&
!(s->flags & SRV_F_BACKUP) && s->next_eweight)
srv_shutdown_backup_streams(s->proxy, SF_ERR_UP);
/* check if we can handle some connections queued at the proxy. We
* will take as many as we can handle.
*/
xferred = pendconn_grab_from_px(s);
tmptrash = alloc_trash_chunk();
if (tmptrash) {
chunk_printf(tmptrash,
"%sServer %s/%s is UP", s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id);
srv_append_status(tmptrash, s, NULL, xferred, 0);
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, LOG_NOTICE, "%s.\n",
tmptrash->area);
send_email_alert(s, LOG_NOTICE, "%s",
tmptrash->area);
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
set_backend_down(s->proxy);
}
else if (s->cur_eweight != s->next_eweight) {
/* now propagate the status change to any LB algorithms */
if (px->lbprm.update_server_eweight)
px->lbprm.update_server_eweight(s);
else if (srv_willbe_usable(s)) {
if (px->lbprm.set_server_status_up)
px->lbprm.set_server_status_up(s);
}
else {
if (px->lbprm.set_server_status_down)
px->lbprm.set_server_status_down(s);
}
if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
set_backend_down(s->proxy);
}
s->next_admin = next_admin;
}
/* reset operational state change */
*s->op_st_chg.reason = 0;
s->op_st_chg.status = s->op_st_chg.code = -1;
s->op_st_chg.duration = 0;
/* Now we try to apply pending admin changes */
/* Maintenance must also disable health checks */
if (!(s->cur_admin & SRV_ADMF_MAINT) && (s->next_admin & SRV_ADMF_MAINT)) {
if (s->check.state & CHK_ST_ENABLED) {
s->check.state |= CHK_ST_PAUSED;
check->health = 0;
}
if (s->cur_state == SRV_ST_STOPPED) { /* server was already down */
tmptrash = alloc_trash_chunk();
if (tmptrash) {
chunk_printf(tmptrash,
"%sServer %s/%s was DOWN and now enters maintenance%s%s%s",
s->flags & SRV_F_BACKUP ? "Backup " : "", s->proxy->id, s->id,
*(s->adm_st_chg_cause) ? " (" : "", s->adm_st_chg_cause, *(s->adm_st_chg_cause) ? ")" : "");
srv_append_status(tmptrash, s, NULL, -1, (s->next_admin & SRV_ADMF_FMAINT));
if (!(global.mode & MODE_STARTING)) {
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, LOG_NOTICE, "%s.\n",
tmptrash->area);
}
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
/* commit new admin status */
s->cur_admin = s->next_admin;
}
else { /* server was still running */
check->health = 0; /* failure */
s->last_change = now.tv_sec;
s->next_state = SRV_ST_STOPPED;
if (s->proxy->lbprm.set_server_status_down)
s->proxy->lbprm.set_server_status_down(s);
if (s->onmarkeddown & HANA_ONMARKEDDOWN_SHUTDOWNSESSIONS)
srv_shutdown_streams(s, SF_ERR_DOWN);
/* force connection cleanup on the given server */
srv_cleanup_connections(s);
/* we might have streams queued on this server and waiting for
* a connection. Those which are redispatchable will be queued
* to another server or to the proxy itself.
*/
xferred = pendconn_redistribute(s);
tmptrash = alloc_trash_chunk();
if (tmptrash) {
chunk_printf(tmptrash,
"%sServer %s/%s is going DOWN for maintenance%s%s%s",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id,
*(s->adm_st_chg_cause) ? " (" : "", s->adm_st_chg_cause, *(s->adm_st_chg_cause) ? ")" : "");
srv_append_status(tmptrash, s, NULL, xferred, (s->next_admin & SRV_ADMF_FMAINT));
if (!(global.mode & MODE_STARTING)) {
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, srv_was_stopping ? LOG_NOTICE : LOG_ALERT, "%s.\n",
tmptrash->area);
}
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
set_backend_down(s->proxy);
s->counters.down_trans++;
}
}
else if ((s->cur_admin & SRV_ADMF_MAINT) && !(s->next_admin & SRV_ADMF_MAINT)) {
/* OK here we're leaving maintenance, we have many things to check,
* because the server might possibly be coming back up depending on
* its state. In practice, leaving maintenance means that we should
* immediately turn to UP (more or less the slowstart) under the
* following conditions :
* - server is neither checked nor tracked
* - server tracks another server which is not checked
* - server tracks another server which is already up
* Which sums up as something simpler :
* "either the tracking server is up or the server's checks are disabled
* or up". Otherwise we only re-enable health checks. There's a special
* case associated to the stopping state which can be inherited. Note
* that the server might still be in drain mode, which is naturally dealt
* with by the lower level functions.
*/
if (s->check.state & CHK_ST_ENABLED) {
s->check.state &= ~CHK_ST_PAUSED;
check->health = check->rise; /* start OK but check immediately */
}
if ((!s->track || s->track->next_state != SRV_ST_STOPPED) &&
(!(s->agent.state & CHK_ST_ENABLED) || (s->agent.health >= s->agent.rise)) &&
(!(s->check.state & CHK_ST_ENABLED) || (s->check.health >= s->check.rise))) {
if (s->track && s->track->next_state == SRV_ST_STOPPING) {
s->next_state = SRV_ST_STOPPING;
}
else {
s->next_state = SRV_ST_STARTING;
if (s->slowstart > 0) {
if (s->warmup)
task_schedule(s->warmup, tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20))));
}
else
s->next_state = SRV_ST_RUNNING;
}
}
tmptrash = alloc_trash_chunk();
if (tmptrash) {
if (!(s->next_admin & SRV_ADMF_FMAINT) && (s->cur_admin & SRV_ADMF_FMAINT)) {
chunk_printf(tmptrash,
"%sServer %s/%s is %s/%s (leaving forced maintenance)",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id,
(s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP",
(s->next_admin & SRV_ADMF_DRAIN) ? "DRAIN" : "READY");
}
if (!(s->next_admin & SRV_ADMF_RMAINT) && (s->cur_admin & SRV_ADMF_RMAINT)) {
chunk_printf(tmptrash,
"%sServer %s/%s ('%s') is %s/%s (resolves again)",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id, s->hostname,
(s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP",
(s->next_admin & SRV_ADMF_DRAIN) ? "DRAIN" : "READY");
}
if (!(s->next_admin & SRV_ADMF_IMAINT) && (s->cur_admin & SRV_ADMF_IMAINT)) {
chunk_printf(tmptrash,
"%sServer %s/%s is %s/%s (leaving maintenance)",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id,
(s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP",
(s->next_admin & SRV_ADMF_DRAIN) ? "DRAIN" : "READY");
}
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, LOG_NOTICE, "%s.\n",
tmptrash->area);
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
server_recalc_eweight(s, 0);
/* now propagate the status change to any LB algorithms */
if (px->lbprm.update_server_eweight)
px->lbprm.update_server_eweight(s);
else if (srv_willbe_usable(s)) {
if (px->lbprm.set_server_status_up)
px->lbprm.set_server_status_up(s);
}
else {
if (px->lbprm.set_server_status_down)
px->lbprm.set_server_status_down(s);
}
if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
set_backend_down(s->proxy);
/* If the server is set with "on-marked-up shutdown-backup-sessions",
* and it's not a backup server and its effective weight is > 0,
* then it can accept new connections, so we shut down all streams
* on all backup servers.
*/
if ((s->onmarkedup & HANA_ONMARKEDUP_SHUTDOWNBACKUPSESSIONS) &&
!(s->flags & SRV_F_BACKUP) && s->next_eweight)
srv_shutdown_backup_streams(s->proxy, SF_ERR_UP);
/* check if we can handle some connections queued at the proxy. We
* will take as many as we can handle.
*/
xferred = pendconn_grab_from_px(s);
}
else if (s->next_admin & SRV_ADMF_MAINT) {
/* remaining in maintenance mode, let's inform precisely about the
* situation.
*/
if (!(s->next_admin & SRV_ADMF_FMAINT) && (s->cur_admin & SRV_ADMF_FMAINT)) {
tmptrash = alloc_trash_chunk();
if (tmptrash) {
chunk_printf(tmptrash,
"%sServer %s/%s is leaving forced maintenance but remains in maintenance",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id);
if (s->track) /* normally it's mandatory here */
chunk_appendf(tmptrash, " via %s/%s",
s->track->proxy->id, s->track->id);
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, LOG_NOTICE, "%s.\n",
tmptrash->area);
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
}
if (!(s->next_admin & SRV_ADMF_RMAINT) && (s->cur_admin & SRV_ADMF_RMAINT)) {
tmptrash = alloc_trash_chunk();
if (tmptrash) {
chunk_printf(tmptrash,
"%sServer %s/%s ('%s') resolves again but remains in maintenance",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id, s->hostname);
if (s->track) /* normally it's mandatory here */
chunk_appendf(tmptrash, " via %s/%s",
s->track->proxy->id, s->track->id);
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, LOG_NOTICE, "%s.\n",
tmptrash->area);
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
}
else if (!(s->next_admin & SRV_ADMF_IMAINT) && (s->cur_admin & SRV_ADMF_IMAINT)) {
tmptrash = alloc_trash_chunk();
if (tmptrash) {
chunk_printf(tmptrash,
"%sServer %s/%s remains in forced maintenance",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id);
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, LOG_NOTICE, "%s.\n",
tmptrash->area);
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
}
/* don't report anything when leaving drain mode and remaining in maintenance */
s->cur_admin = s->next_admin;
}
if (!(s->next_admin & SRV_ADMF_MAINT)) {
if (!(s->cur_admin & SRV_ADMF_DRAIN) && (s->next_admin & SRV_ADMF_DRAIN)) {
/* drain state is applied only if not yet in maint */
s->last_change = now.tv_sec;
if (px->lbprm.set_server_status_down)
px->lbprm.set_server_status_down(s);
/* we might have streams queued on this server and waiting for
* a connection. Those which are redispatchable will be queued
* to another server or to the proxy itself.
*/
xferred = pendconn_redistribute(s);
tmptrash = alloc_trash_chunk();
if (tmptrash) {
chunk_printf(tmptrash, "%sServer %s/%s enters drain state%s%s%s",
s->flags & SRV_F_BACKUP ? "Backup " : "", s->proxy->id, s->id,
*(s->adm_st_chg_cause) ? " (" : "", s->adm_st_chg_cause, *(s->adm_st_chg_cause) ? ")" : "");
srv_append_status(tmptrash, s, NULL, xferred, (s->next_admin & SRV_ADMF_FDRAIN));
if (!(global.mode & MODE_STARTING)) {
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, LOG_NOTICE, "%s.\n",
tmptrash->area);
send_email_alert(s, LOG_NOTICE, "%s",
tmptrash->area);
}
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
if (prev_srv_count && s->proxy->srv_bck == 0 && s->proxy->srv_act == 0)
set_backend_down(s->proxy);
}
else if ((s->cur_admin & SRV_ADMF_DRAIN) && !(s->next_admin & SRV_ADMF_DRAIN)) {
/* OK completely leaving drain mode */
if (s->proxy->srv_bck == 0 && s->proxy->srv_act == 0) {
if (s->proxy->last_change < now.tv_sec) // ignore negative times
s->proxy->down_time += now.tv_sec - s->proxy->last_change;
s->proxy->last_change = now.tv_sec;
}
if (s->last_change < now.tv_sec) // ignore negative times
s->down_time += now.tv_sec - s->last_change;
s->last_change = now.tv_sec;
server_recalc_eweight(s, 0);
tmptrash = alloc_trash_chunk();
if (tmptrash) {
if (!(s->next_admin & SRV_ADMF_FDRAIN)) {
chunk_printf(tmptrash,
"%sServer %s/%s is %s (leaving forced drain)",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id,
(s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP");
}
else {
chunk_printf(tmptrash,
"%sServer %s/%s is %s (leaving drain)",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id,
(s->next_state == SRV_ST_STOPPED) ? "DOWN" : "UP");
if (s->track) /* normally it's mandatory here */
chunk_appendf(tmptrash, " via %s/%s",
s->track->proxy->id, s->track->id);
}
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, LOG_NOTICE, "%s.\n",
tmptrash->area);
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
/* now propagate the status change to any LB algorithms */
if (px->lbprm.update_server_eweight)
px->lbprm.update_server_eweight(s);
else if (srv_willbe_usable(s)) {
if (px->lbprm.set_server_status_up)
px->lbprm.set_server_status_up(s);
}
else {
if (px->lbprm.set_server_status_down)
px->lbprm.set_server_status_down(s);
}
}
else if ((s->next_admin & SRV_ADMF_DRAIN)) {
/* remaining in drain mode after removing one of its flags */
tmptrash = alloc_trash_chunk();
if (tmptrash) {
if (!(s->next_admin & SRV_ADMF_FDRAIN)) {
chunk_printf(tmptrash,
"%sServer %s/%s is leaving forced drain but remains in drain mode",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id);
if (s->track) /* normally it's mandatory here */
chunk_appendf(tmptrash, " via %s/%s",
s->track->proxy->id, s->track->id);
}
else {
chunk_printf(tmptrash,
"%sServer %s/%s remains in forced drain mode",
s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id);
}
ha_warning("%s.\n", tmptrash->area);
send_log(s->proxy, LOG_NOTICE, "%s.\n",
tmptrash->area);
free_trash_chunk(tmptrash);
tmptrash = NULL;
}
/* commit new admin status */
s->cur_admin = s->next_admin;
}
}
/* Re-set log strings to empty */
*s->adm_st_chg_cause = 0;
}
struct task *srv_cleanup_toremove_connections(struct task *task, void *context, unsigned short state)
{
struct connection *conn;
while ((conn = MT_LIST_POP(&idle_conns[tid].toremove_conns,
struct connection *, list)) != NULL) {
conn->mux->destroy(conn->ctx);
}
return task;
}
/* Move toremove_nb connections from idle_list to toremove_list, -1 means
* moving them all.
* Returns the number of connections moved.
*/
static int srv_migrate_conns_to_remove(struct mt_list *idle_list, struct mt_list *toremove_list, int toremove_nb)
{
struct mt_list *elt1, elt2;
struct connection *conn;
int i = 0;
mt_list_for_each_entry_safe(conn, idle_list, list, elt1, elt2) {
if (toremove_nb != -1 && i >= toremove_nb)
break;
MT_LIST_DEL_SAFE_NOINIT(elt1);
MT_LIST_ADDQ(toremove_list, &conn->list);
i++;
}
return i;
}
/* cleanup connections for a given server
* might be useful when going on forced maintenance or live changing ip/port
*/
static void srv_cleanup_connections(struct server *srv)
{
int did_remove;
int i;
/* check all threads starting with ours */
for (i = tid;;) {
did_remove = 0;
if (srv_migrate_conns_to_remove(&srv->idle_conns[i], &idle_conns[i].toremove_conns, -1) > 0)
did_remove = 1;
if (srv_migrate_conns_to_remove(&srv->safe_conns[i], &idle_conns[i].toremove_conns, -1) > 0)
did_remove = 1;
if (did_remove)
task_wakeup(idle_conns[i].cleanup_task, TASK_WOKEN_OTHER);
if ((i = ((i + 1 == global.nbthread) ? 0 : i + 1)) == tid)
break;
}
}
struct task *srv_cleanup_idle_connections(struct task *task, void *context, unsigned short state)
{
struct server *srv;
struct eb32_node *eb;
int i;
unsigned int next_wakeup;
next_wakeup = TICK_ETERNITY;
HA_SPIN_LOCK(OTHER_LOCK, &idle_conn_srv_lock);
while (1) {
int exceed_conns;
int to_kill;
int curr_idle;
eb = eb32_lookup_ge(&idle_conn_srv, now_ms - TIMER_LOOK_BACK);
if (!eb) {
/* we might have reached the end of the tree, typically because
* <now_ms> is in the first half and we're first scanning the last
* half. Let's loop back to the beginning of the tree now.
*/
eb = eb32_first(&idle_conn_srv);
if (likely(!eb))
break;
}
if (tick_is_lt(now_ms, eb->key)) {
/* timer not expired yet, revisit it later */
next_wakeup = eb->key;
break;
}
srv = eb32_entry(eb, struct server, idle_node);
/* Calculate how many idle connections we want to kill :
* we want to remove half the difference between the total
* of established connections (used or idle) and the max
* number of used connections.
*/
curr_idle = srv->curr_idle_conns;
if (curr_idle == 0)
goto remove;
exceed_conns = srv->curr_used_conns + curr_idle - MAX(srv->max_used_conns, srv->est_need_conns);
exceed_conns = to_kill = exceed_conns / 2 + (exceed_conns & 1);
srv->est_need_conns = (srv->est_need_conns + srv->max_used_conns) / 2;
if (srv->est_need_conns < srv->max_used_conns)
srv->est_need_conns = srv->max_used_conns;
srv->max_used_conns = srv->curr_used_conns;
if (exceed_conns <= 0)
goto remove;
/* check all threads starting with ours */
for (i = tid;;) {
int max_conn;
int j;
int did_remove = 0;
max_conn = (exceed_conns * srv->curr_idle_thr[i]) /
curr_idle + 1;
j = srv_migrate_conns_to_remove(&srv->idle_conns[i], &idle_conns[i].toremove_conns, max_conn);
if (j > 0)
did_remove = 1;
if (max_conn - j > 0 &&
srv_migrate_conns_to_remove(&srv->safe_conns[i], &idle_conns[i].toremove_conns, max_conn - j) > 0)
did_remove = 1;
if (did_remove)
task_wakeup(idle_conns[i].cleanup_task, TASK_WOKEN_OTHER);
if ((i = ((i + 1 == global.nbthread) ? 0 : i + 1)) == tid)
break;
}
remove:
eb32_delete(&srv->idle_node);
if (srv->curr_idle_conns) {
/* There are still more idle connections, add the
* server back in the tree.
*/
srv->idle_node.key = tick_add(srv->pool_purge_delay, now_ms);
eb32_insert(&idle_conn_srv, &srv->idle_node);
next_wakeup = tick_first(next_wakeup, srv->idle_node.key);
}
}
HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conn_srv_lock);
task->expire = next_wakeup;
return task;
}
/* config parser for global "tune.idle-pool.shared", accepts "on" or "off" */
static int cfg_parse_idle_pool_shared(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
if (too_many_args(1, args, err, NULL))
return -1;
if (strcmp(args[1], "on") == 0)
global.tune.options |= GTUNE_IDLE_POOL_SHARED;
else if (strcmp(args[1], "off") == 0)
global.tune.options &= ~GTUNE_IDLE_POOL_SHARED;
else {
memprintf(err, "'%s' expects either 'on' or 'off' but got '%s'.", args[0], args[1]);
return -1;
}
return 0;
}
/* config parser for global "tune.pool-{low,high}-fd-ratio" */
static int cfg_parse_pool_fd_ratio(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
int arg = -1;
if (too_many_args(1, args, err, NULL))
return -1;
if (*(args[1]) != 0)
arg = atoi(args[1]);
if (arg < 0 || arg > 100) {
memprintf(err, "'%s' expects an integer argument between 0 and 100.", args[0]);
return -1;
}
if (args[0][10] == 'h')
global.tune.pool_high_ratio = arg;
else
global.tune.pool_low_ratio = arg;
return 0;
}
/* config keyword parsers */
static struct cfg_kw_list cfg_kws = {ILH, {
{ CFG_GLOBAL, "tune.idle-pool.shared", cfg_parse_idle_pool_shared },
{ CFG_GLOBAL, "tune.pool-high-fd-ratio", cfg_parse_pool_fd_ratio },
{ CFG_GLOBAL, "tune.pool-low-fd-ratio", cfg_parse_pool_fd_ratio },
{ 0, NULL, NULL }
}};
INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/