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62c3be28ed
In a config where server "s1" is marked disabled and "s2" tracks "s1", s2 appears disabled on the stats but is still inserted into the LB farm because the tracking is resolved too late in the configuration process. We now resolve tracked servers before building LB maps and we also mark the tracking server in maintenance mode, which previously was not done, causing half of the issue. Last point is that we also protect srv_is_usable() against electing a server marked for maintenance. This is not absolutely needed but is a safe choice and makes a lot of sense. This fix must be backported to 1.4.
69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/*
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* include/proto/backend.h
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* Functions prototypes for the backend.
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*
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* Copyright (C) 2000-2012 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_BACKEND_H
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#define _PROTO_BACKEND_H
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#include <common/config.h>
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#include <types/backend.h>
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#include <types/proxy.h>
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#include <types/server.h>
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#include <types/session.h>
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int assign_server(struct session *s);
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int assign_server_address(struct session *s);
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int assign_server_and_queue(struct session *s);
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int connect_server(struct session *s);
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int srv_redispatch_connect(struct session *t);
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const char *backend_lb_algo_str(int algo);
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int backend_parse_balance(const char **args, char *err,
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int errlen, struct proxy *curproxy);
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int be_downtime(struct proxy *px);
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void recount_servers(struct proxy *px);
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void update_backend_weight(struct proxy *px);
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struct server *get_server_sh(struct proxy *px, const char *addr, int len);
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struct server *get_server_uh(struct proxy *px, char *uri, int uri_len);
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/* This function returns non-zero if a server with the given weight and state
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* is usable for LB, otherwise zero.
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*/
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static inline int srv_is_usable(int state, int weight)
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{
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if (!weight)
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return 0;
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if (state & (SRV_GOINGDOWN | SRV_MAINTAIN))
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return 0;
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if (!(state & SRV_RUNNING))
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return 0;
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return 1;
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}
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#endif /* _PROTO_BACKEND_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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