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2491b8ae52
In some circumstances, e.g. while performing a switchover, it is essential
that repmgrd does not take any kind of failover action, as this will put
the cluster into an incorrect state.
Previously it was necessary to stop repmgrd on all nodes (or at least
those nodes which repmgrd would consider as promotion candidates), however
this is a cumbersome and potentially risk-prone operation, particularly if the
replication cluster contains more than a couple of servers.
To prevent this issue from occurring, this patch introduces the ability
to "pause" repmgrd on all nodes wth a single command ("repmgr daemon pause")
which notifies repmgrd not to take any failover action until the node
is "unpaused" ("repmgr daemon unpause").
"repmgr daemon status" provides an overview of each node and whether repmgrd
is running, and if so whether it is paused.
"repmgr standby switchover" has been modified to automatically pause repmgrd
while carrying out the switchover.
See documentation for further details.
103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/*
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* repmgr.h
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* Copyright (c) 2ndQuadrant, 2010-2018
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _REPMGR_CONFIG_H
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#define _REPMGR_CONFIG_H
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#include <config.h>
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#endif
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#ifndef _REPMGR_H_
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#define _REPMGR_H_
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <libpq-fe.h>
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#include <postgres_fe.h>
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#include <pqexpbuffer.h>
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#include "repmgr_version.h"
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#include "errcode.h"
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#include "strutil.h"
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#include "configfile.h"
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#include "dbutils.h"
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#include "log.h"
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#define MIN_SUPPORTED_VERSION "9.3"
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#define MIN_SUPPORTED_VERSION_NUM 90300
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#define REPLICATION_TYPE_PHYSICAL 1
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#define REPLICATION_TYPE_BDR 2
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#define UNKNOWN_SERVER_VERSION_NUM -1
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#define UNKNOWN_BDR_VERSION_NUM -1
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#define UNKNOWN_TIMELINE_ID -1
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#define UNKNOWN_SYSTEM_IDENTIFIER 0
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#define UNKNOWN_PID -1
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#define NODE_NOT_FOUND -1
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#define NO_UPSTREAM_NODE -1
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#define UNKNOWN_NODE_ID -1
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#define VOTING_TERM_NOT_SET -1
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#define BDR2_REPLICATION_SET_NAME "repmgr"
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/*
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* various default values - ensure repmgr.conf.sample is update
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* if any of these are changed
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*/
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#define DEFAULT_LOCATION "default"
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#define DEFAULT_PRIORITY 100
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#define DEFAULT_RECONNECTION_ATTEMPTS 6 /* seconds */
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#define DEFAULT_RECONNECTION_INTERVAL 10 /* seconds */
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#define DEFAULT_MONITORING_INTERVAL 2 /* seconds */
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#define DEFAULT_ASYNC_QUERY_TIMEOUT 60 /* seconds */
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#define DEFAULT_PRIMARY_NOTIFICATION_TIMEOUT 60 /* seconds */
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#define DEFAULT_PRIMARY_FOLLOW_TIMEOUT 60 /* seconds */
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#define DEFAULT_STANDBY_FOLLOW_TIMEOUT 30 /* seconds */
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#define DEFAULT_BDR_RECOVERY_TIMEOUT 30 /* seconds */
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#define DEFAULT_ARCHIVE_READY_WARNING 16 /* WAL files */
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#define DEFAULT_ARCHIVE_READY_CRITICAL 128 /* WAL files */
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#define DEFAULT_REPLICATION_LAG_WARNING 300 /* seconds */
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#define DEFAULT_REPLICATION_LAG_CRITICAL 600 /* seconds */
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#define DEFAULT_WITNESS_SYNC_INTERVAL 15 /* seconds */
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#define DEFAULT_WAIT_START 30 /* seconds */
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#define DEFAULT_PROMOTE_CHECK_TIMEOUT 60 /* seconds */
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#define DEFAULT_PROMOTE_CHECK_INTERVAL 1 /* seconds */
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#define DEFAULT_SHUTDOWN_CHECK_TIMEOUT 60 /* seconds */
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#define DEFAULT_STANDBY_RECONNECT_TIMEOUT 60 /* seconds */
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#define DEFAULT_NODE_REJOIN_TIMEOUT 60 /* seconds */
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#ifndef RECOVERY_COMMAND_FILE
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#define RECOVERY_COMMAND_FILE "recovery.conf"
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#endif
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#ifndef TABLESPACE_MAP
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#define TABLESPACE_MAP "tablespace_map"
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#endif
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#endif /* _REPMGR_H_ */
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