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c8d5b95e6d
Historically the default frontend's maxconn used to be quite low (2000),
which was sufficient two decades ago but often proved to be a problem
when users had purposely set the global maxconn value but forgot to set
the frontend's.
There is no point in keeping this arbitrary limit for frontends : when
the global maxconn is lower, it's already too high and when the global
maxconn is much higher, it becomes a limiting factor which causes trouble
in production.
This commit allows the value to be set to zero, which becomes the new
default value, to mean it's not directly limited, or in fact it's set
to the global maxconn. Since this operation used to be performed before
computing a possibly automatic global maxconn based on memory limits,
the calculation of the maxconn value and its propagation to the backends'
fullconn has now moved to a dedicated function, proxy_adjust_all_maxconn(),
which is called once the global maxconn is stabilized.
This comes with two benefits :
1) a configuration missing "maxconn" in the defaults section will not
limit itself to a magically hardcoded value but will scale up to the
global maxconn ;
2) when the global maxconn is not set and memory limits are used instead,
the frontends' maxconn automatically adapts, and the backends' fullconn
as well.
166 lines
5.7 KiB
C
166 lines
5.7 KiB
C
/*
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* include/proto/proxy.h
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* This file defines function prototypes for proxy management.
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*
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* Copyright (C) 2000-2011 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _PROTO_PROXY_H
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#define _PROTO_PROXY_H
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#include <common/config.h>
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#include <common/ticks.h>
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#include <common/time.h>
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#include <types/applet.h>
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#include <types/global.h>
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#include <types/proxy.h>
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#include <types/listener.h>
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#include <proto/freq_ctr.h>
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extern struct proxy *proxies_list;
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extern struct eb_root used_proxy_id; /* list of proxy IDs in use */
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extern unsigned int error_snapshot_id; /* global ID assigned to each error then incremented */
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extern struct eb_root proxy_by_name; /* tree of proxies sorted by name */
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extern const struct cfg_opt cfg_opts[];
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extern const struct cfg_opt cfg_opts2[];
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int start_proxies(int verbose);
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struct task *manage_proxy(struct task *t, void *context, unsigned short state);
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void soft_stop(void);
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int pause_proxy(struct proxy *p);
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int resume_proxy(struct proxy *p);
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void stop_proxy(struct proxy *p);
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void zombify_proxy(struct proxy *p);
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void pause_proxies(void);
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void resume_proxies(void);
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int stream_set_backend(struct stream *s, struct proxy *be);
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const char *proxy_cap_str(int cap);
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const char *proxy_mode_str(int mode);
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void proxy_store_name(struct proxy *px);
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struct proxy *proxy_find_by_id(int id, int cap, int table);
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struct proxy *proxy_find_by_name(const char *name, int cap, int table);
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struct proxy *proxy_find_best_match(int cap, const char *name, int id, int *diff);
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struct server *findserver(const struct proxy *px, const char *name);
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int proxy_cfg_ensure_no_http(struct proxy *curproxy);
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void init_new_proxy(struct proxy *p);
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int get_backend_server(const char *bk_name, const char *sv_name,
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struct proxy **bk, struct server **sv);
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void proxy_capture_error(struct proxy *proxy, int is_back,
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struct proxy *other_end, enum obj_type *target,
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const struct session *sess,
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const struct buffer *buf, long buf_ofs,
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unsigned int buf_out, unsigned int err_pos,
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const union error_snapshot_ctx *ctx,
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void (*show)(struct buffer *, const struct error_snapshot *));
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void proxy_adjust_all_maxconn();
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struct proxy *cli_find_frontend(struct appctx *appctx, const char *arg);
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struct proxy *cli_find_frontend(struct appctx *appctx, const char *arg);
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/*
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* This function returns a string containing the type of the proxy in a format
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* suitable for error messages, from its capabilities.
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*/
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static inline const char *proxy_type_str(struct proxy *proxy)
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{
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return proxy_cap_str(proxy->cap);
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}
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/* Find the frontend having name <name>. The name may also start with a '#' to
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* reference a numeric id. NULL is returned if not found.
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*/
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static inline struct proxy *proxy_fe_by_name(const char *name)
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{
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return proxy_find_by_name(name, PR_CAP_FE, 0);
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}
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/* Find the backend having name <name>. The name may also start with a '#' to
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* reference a numeric id. NULL is returned if not found.
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*/
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static inline struct proxy *proxy_be_by_name(const char *name)
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{
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return proxy_find_by_name(name, PR_CAP_BE, 0);
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}
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/* Find the table having name <name>. The name may also start with a '#' to
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* reference a numeric id. NULL is returned if not found.
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*/
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static inline struct proxy *proxy_tbl_by_name(const char *name)
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{
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return proxy_find_by_name(name, 0, 1);
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}
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/* this function initializes all timeouts for proxy p */
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static inline void proxy_reset_timeouts(struct proxy *proxy)
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{
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proxy->timeout.client = TICK_ETERNITY;
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proxy->timeout.tarpit = TICK_ETERNITY;
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proxy->timeout.queue = TICK_ETERNITY;
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proxy->timeout.connect = TICK_ETERNITY;
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proxy->timeout.server = TICK_ETERNITY;
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proxy->timeout.httpreq = TICK_ETERNITY;
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proxy->timeout.check = TICK_ETERNITY;
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proxy->timeout.tunnel = TICK_ETERNITY;
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}
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/* increase the number of cumulated connections received on the designated frontend */
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static void inline proxy_inc_fe_conn_ctr(struct listener *l, struct proxy *fe)
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{
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HA_ATOMIC_ADD(&fe->fe_counters.cum_conn, 1);
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if (l->counters)
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HA_ATOMIC_ADD(&l->counters->cum_conn, 1);
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HA_ATOMIC_UPDATE_MAX(&fe->fe_counters.cps_max,
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update_freq_ctr(&fe->fe_conn_per_sec, 1));
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}
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/* increase the number of cumulated connections accepted by the designated frontend */
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static void inline proxy_inc_fe_sess_ctr(struct listener *l, struct proxy *fe)
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{
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HA_ATOMIC_ADD(&fe->fe_counters.cum_sess, 1);
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if (l->counters)
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HA_ATOMIC_ADD(&l->counters->cum_sess, 1);
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HA_ATOMIC_UPDATE_MAX(&fe->fe_counters.sps_max,
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update_freq_ctr(&fe->fe_sess_per_sec, 1));
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}
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/* increase the number of cumulated connections on the designated backend */
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static void inline proxy_inc_be_ctr(struct proxy *be)
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{
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HA_ATOMIC_ADD(&be->be_counters.cum_conn, 1);
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HA_ATOMIC_UPDATE_MAX(&be->be_counters.sps_max,
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update_freq_ctr(&be->be_sess_per_sec, 1));
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}
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/* increase the number of cumulated requests on the designated frontend */
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static void inline proxy_inc_fe_req_ctr(struct proxy *fe)
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{
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HA_ATOMIC_ADD(&fe->fe_counters.p.http.cum_req, 1);
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HA_ATOMIC_UPDATE_MAX(&fe->fe_counters.p.http.rps_max,
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update_freq_ctr(&fe->fe_req_per_sec, 1));
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}
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#endif /* _PROTO_PROXY_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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