mirror of
https://github.com/EnterpriseDB/repmgr.git
synced 2026-03-23 15:16:29 +00:00
Make repmgrd survive to the failover
To do this it needs to reconnect to the new master
This commit is contained in:
Jaime Casanova
239
repmgrd.c
239
repmgrd.c
@@ -81,6 +81,8 @@ bool verbose = false;
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bool monitoring_history = false;
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char repmgr_schema[MAXLEN];
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bool failover_done = false;
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/*
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* should initialize with {0} to be ANSI complaint ? but this raises
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* error with gcc -Wall
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@@ -203,63 +205,37 @@ main(int argc, char **argv)
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exit(ERR_BAD_CONFIG);
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}
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/*
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* Set my server mode, establish a connection to primary
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* and start monitor
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*/
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if (is_witness(myLocalConn, repmgr_schema, local_options.cluster_name, local_options.node))
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myLocalMode = WITNESS_MODE;
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else if (is_standby(myLocalConn))
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myLocalMode = STANDBY_MODE;
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else /* is the master */
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myLocalMode = PRIMARY_MODE;
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switch (myLocalMode)
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* MAIN LOOP
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* This loops cicles once per failover and at startup
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* Requisites:
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* - myLocalConn needs to be already setted with an active connection
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* - no master connection
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*/
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do
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{
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case PRIMARY_MODE:
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primary_options.node = local_options.node;
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strncpy(primary_options.conninfo, local_options.conninfo, MAXLEN);
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primaryConn = myLocalConn;
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checkClusterConfiguration(myLocalConn, primaryConn);
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checkNodeConfiguration(local_options.conninfo);
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if (reload_configuration(config_file, &local_options))
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{
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PQfinish(myLocalConn);
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myLocalConn = establishDBConnection(local_options.conninfo, true);
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primaryConn = myLocalConn;
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update_registration();
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}
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log_info(_("%s Starting continuous primary connection check\n"), progname);
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/* Check that primary is still alive, and standbies are sending info */
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/*
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* Every SLEEP_MONITOR seconds, do master checks
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* XXX
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* Check that standbies are sending info
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*/
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for (;;)
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* Set my server mode, establish a connection to primary
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* and start monitor
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*/
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if (is_witness(myLocalConn, repmgr_schema, local_options.cluster_name, local_options.node))
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myLocalMode = WITNESS_MODE;
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else if (is_standby(myLocalConn))
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myLocalMode = STANDBY_MODE;
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else /* is the master */
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myLocalMode = PRIMARY_MODE;
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switch (myLocalMode)
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{
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if (CheckPrimaryConnection())
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{
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/*
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CheckActiveStandbiesConnections();
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CheckInactiveStandbies();
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*/
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sleep(SLEEP_MONITOR);
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}
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else
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{
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/* XXX
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* May we do something more verbose ?
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*/
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exit (1);
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}
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if (got_SIGHUP)
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{
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/* if we can reload, then could need to change myLocalConn */
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case PRIMARY_MODE:
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primary_options.node = local_options.node;
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strncpy(primary_options.conninfo, local_options.conninfo, MAXLEN);
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primaryConn = myLocalConn;
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checkClusterConfiguration(myLocalConn, primaryConn);
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checkNodeConfiguration(local_options.conninfo);
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if (reload_configuration(config_file, &local_options))
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{
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PQfinish(myLocalConn);
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@@ -267,70 +243,112 @@ main(int argc, char **argv)
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primaryConn = myLocalConn;
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update_registration();
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}
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got_SIGHUP = false;
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}
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}
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break;
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case WITNESS_MODE:
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case STANDBY_MODE:
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/* I need the id of the primary as well as a connection to it */
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log_info(_("%s Connecting to primary for cluster '%s'\n"),
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progname, local_options.cluster_name);
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primaryConn = getMasterConnection(myLocalConn, repmgr_schema,
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local_options.cluster_name,
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&primary_options.node, NULL);
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if (primaryConn == NULL)
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{
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CloseConnections();
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exit(ERR_BAD_CONFIG);
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}
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log_info(_("%s Starting continuous primary connection check\n"), progname);
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/* Check that primary is still alive, and standbies are sending info */
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/*
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* Every SLEEP_MONITOR seconds, do master checks
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* XXX
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* Check that standbies are sending info
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*/
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do
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{
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if (CheckPrimaryConnection())
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{
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/*
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CheckActiveStandbiesConnections();
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CheckInactiveStandbies();
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*/
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sleep(SLEEP_MONITOR);
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}
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else
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{
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/* XXX
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* May we do something more verbose ?
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*/
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exit(1);
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}
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if (got_SIGHUP)
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{
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/* if we can reload, then could need to change myLocalConn */
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if (reload_configuration(config_file, &local_options))
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{
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PQfinish(myLocalConn);
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myLocalConn = establishDBConnection(local_options.conninfo, true);
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primaryConn = myLocalConn;
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update_registration();
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}
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got_SIGHUP = false;
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}
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} while (!failover_done);
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break;
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case WITNESS_MODE:
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case STANDBY_MODE:
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/* I need the id of the primary as well as a connection to it */
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log_info(_("%s Connecting to primary for cluster '%s'\n"),
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progname, local_options.cluster_name);
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primaryConn = getMasterConnection(myLocalConn, repmgr_schema,
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local_options.cluster_name,
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&primary_options.node, NULL);
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if (primaryConn == NULL)
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{
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CloseConnections();
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exit(ERR_BAD_CONFIG);
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}
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checkClusterConfiguration(myLocalConn, primaryConn);
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checkNodeConfiguration(local_options.conninfo);
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checkClusterConfiguration(myLocalConn, primaryConn);
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checkNodeConfiguration(local_options.conninfo);
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if (reload_configuration(config_file, &local_options))
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{
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PQfinish(myLocalConn);
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myLocalConn = establishDBConnection(local_options.conninfo, true);
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update_registration();
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}
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/*
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* Every SLEEP_MONITOR seconds, do checks
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*/
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if (myLocalMode == WITNESS_MODE)
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{
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log_info(_("%s Starting continuous witness node monitoring\n"), progname);
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}
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else if (myLocalMode == STANDBY_MODE)
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{
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log_info(_("%s Starting continuous standby node monitoring\n"), progname);
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}
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for (;;)
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{
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if (myLocalMode == WITNESS_MODE)
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WitnessMonitor();
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else if (myLocalMode == STANDBY_MODE)
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StandbyMonitor();
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sleep(SLEEP_MONITOR);
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if (got_SIGHUP)
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{
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/* if we can reload, then could need to change myLocalConn */
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if (reload_configuration(config_file, &local_options))
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{
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PQfinish(myLocalConn);
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myLocalConn = establishDBConnection(local_options.conninfo, true);
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update_registration();
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}
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got_SIGHUP = false;
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}
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/*
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* Every SLEEP_MONITOR seconds, do checks
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*/
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if (myLocalMode == WITNESS_MODE)
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{
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log_info(_("%s Starting continuous witness node monitoring\n"), progname);
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}
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else if (myLocalMode == STANDBY_MODE)
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{
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log_info(_("%s Starting continuous standby node monitoring\n"), progname);
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}
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do
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{
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if (myLocalMode == WITNESS_MODE)
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WitnessMonitor();
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else if (myLocalMode == STANDBY_MODE)
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StandbyMonitor();
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sleep(SLEEP_MONITOR);
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if (got_SIGHUP)
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{
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/* if we can reload, then could need to change myLocalConn */
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if (reload_configuration(config_file, &local_options))
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{
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PQfinish(myLocalConn);
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myLocalConn = establishDBConnection(local_options.conninfo, true);
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update_registration();
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}
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got_SIGHUP = false;
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}
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} while (!failover_done);
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break;
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default:
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log_err(_("%s: Unrecognized mode for node %d\n"), progname, local_options.node);
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}
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break;
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default:
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log_err(_("%s: Unrecognized mode for node %d\n"), progname, local_options.node);
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}
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failover_done = false;
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} while (true);
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/* Prevent a double-free */
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if (primaryConn == myLocalConn)
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@@ -481,6 +499,7 @@ StandbyMonitor(void)
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* a new primaryConn
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*/
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do_failover();
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return;
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}
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}
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@@ -901,6 +920,9 @@ do_failover(void)
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exit(ERR_FAILOVER_FAIL);
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}
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/* to force it to re-calculate mode and master node */
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failover_done = true;
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/* and reconnect to the local database */
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myLocalConn = establishDBConnection(local_options.conninfo, true);
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}
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@@ -1089,6 +1111,7 @@ static void
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handle_sigint(SIGNAL_ARGS)
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{
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CloseConnections();
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logger_shutdown();
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exit(1);
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}
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