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include/types/server.h
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This file defines everything related to servers.
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Copyright (C) 2000-2006 Willy Tarreau - w@1wt.eu
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Copyright (C) 2000-2007 Willy Tarreau - w@1wt.eu
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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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#define SRV_MAPPORTS 0x0004 /* this server uses mapped ports */
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#define SRV_BIND_SRC 0x0008 /* this server uses a specific source address */
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#define SRV_CHECKED 0x0010 /* this server needs to be checked */
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#define SRV_TPROXY_ADDR 0x0020 /* bind to this non-local address to reach this server */
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#define SRV_TPROXY_CIP 0x0040 /* bind to the client's IP address to reach this server */
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#define SRV_TPROXY_CLI 0x0060 /* bind to the client's IP+port to reach this server */
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#define SRV_TPROXY_MASK 0x0060 /* bind to a non-local address to reach this server */
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#define SRV_GOINGDOWN 0x0020 /* this server says that it's going down (404) */
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#define SRV_WARMINGUP 0x0040 /* this server is warming up after a failure */
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#define SRV_TPROXY_ADDR 0x0100 /* bind to this non-local address to reach this server */
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#define SRV_TPROXY_CIP 0x0200 /* bind to the client's IP address to reach this server */
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#define SRV_TPROXY_CLI 0x0300 /* bind to the client's IP+port to reach this server */
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#define SRV_TPROXY_MASK 0x0300 /* bind to a non-local address to reach this server */
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/* function which act on servers need to return various errors */
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#define SRV_STATUS_OK 0 /* everything is OK. */
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#define SRV_STATUS_FULL 3 /* the/all server(s) are saturated */
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#define SRV_STATUS_QUEUED 4 /* the/all server(s) are saturated but the connection was queued */
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/* bits for s->result used for health-checks */
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#define SRV_CHK_UNKNOWN 0x0000 /* initialized to this by default */
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#define SRV_CHK_ERROR 0x0001 /* error encountered during the check; has precedence */
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#define SRV_CHK_RUNNING 0x0002 /* server seen as running */
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#define SRV_CHK_DISABLE 0x0004 /* server returned a "disable" code */
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/* various constants */
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#define SRV_UWGHT_RANGE 256
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#define SRV_UWGHT_MAX (SRV_UWGHT_RANGE - 1)
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#define SRV_EWGHT_RANGE (SRV_UWGHT_RANGE * BE_WEIGHT_SCALE)
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#define SRV_EWGHT_MAX (SRV_UWGHT_MAX * BE_WEIGHT_SCALE)
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struct server *next;
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int state; /* server state (SRV_*) */
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int prev_state; /* server state before last change (SRV_*) */
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int cklen; /* the len of the cookie, to speed up checks */
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char *cookie; /* the id set in the cookie */
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int cur_sess, cur_sess_max; /* number of currently active sessions (including syn_sent) */
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unsigned maxconn, minconn; /* max # of active sessions (0 = unlimited), min# for dynamic limit. */
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int nbpend, nbpend_max; /* number of pending connections */
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int maxqueue; /* maximum number of pending connections allowed */
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struct list pendconns; /* pending connections */
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struct task *queue_mgt; /* the task associated to the queue processing */
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int health; /* 0->rise-1 = bad; rise->rise+fall-1 = good */
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int rise, fall; /* time in iterations */
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int inter; /* time in milliseconds */
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int result; /* 0 = connect OK, -1 = connect KO */
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int slowstart; /* slowstart time in seconds (ms in the conf) */
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int result; /* health-check result : SRV_CHK_* */
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int curfd; /* file desc used for current test, or -1 if not in test */
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char *id; /* just for identification */
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unsigned uweight, eweight; /* user-specified weight, and effective weight */
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unsigned wscore; /* weight score, used during srv map computation */
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unsigned prev_eweight; /* eweight before last change */
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unsigned rweight; /* remainer of weight in the current LB tree */
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unsigned npos, lpos; /* next and last positions in the LB tree */
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struct eb32_node lb_node; /* node used for tree-based load balancing */
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struct eb_root *lb_tree; /* we want to know in what tree the server is */
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struct server *next_full; /* next server in the temporary full list */
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unsigned failed_checks, down_trans; /* failed checks and up-down transitions */
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unsigned down_time; /* total time the server was down */
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time_t last_change; /* last time, when the state was changed */
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unsigned failed_conns, failed_resp; /* failed connect() and responses */
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unsigned retries; /* retried connections */
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unsigned failed_secu; /* blocked responses because of security concerns */
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unsigned cum_sess; /* cumulated number of sessions really sent to this server */
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unsigned cum_lbconn; /* cumulated number of sessions directed by load balancing */
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long long bytes_in; /* number of bytes transferred from the client to the server */
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long long bytes_out; /* number of bytes transferred from the server to the client */
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int puid; /* proxy-unique server ID, used for SNMP */
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include/types/server.h
