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repmgrd: optionally disconnect WAL receivers during failover

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This is intended to ensure that all nodes have a constant LSN while
making the failover decision.

This feature is experimental and needs to be explicitly enabled with the
configuration file option "standby_disconnect_on_failover".

Note enabling this option will result in a delay in the failover decision
until the WAL receiver is disconnected on all nodes.
This commit is contained in:
Ian Barwick
2019-03-01 18:20:44 +09:00
committed by Ian Barwick
parent dd04ebb809
commit 1615353f48
16 changed files with 404 additions and 17 deletions
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3
configfile.c
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@@ -358,6 +358,7 @@ _parse_config(t_configuration_options *options, ItemList *error_list, ItemList *
options->primary_notification_timeout = DEFAULT_PRIMARY_NOTIFICATION_TIMEOUT;
options->repmgrd_standby_startup_timeout = -1; /* defaults to "standby_reconnect_timeout" if not set */
memset(options->repmgrd_pid_file, 0, sizeof(options->repmgrd_pid_file));
options->standby_disconnect_on_failover = false;
options->connection_check_type = CHECK_PING;
/*-------------
@@ -619,6 +620,8 @@ _parse_config(t_configuration_options *options, ItemList *error_list, ItemList *
options->repmgrd_standby_startup_timeout = repmgr_atoi(value, name, error_list, 0);
else if (strcmp(name, "repmgrd_pid_file") == 0)
strncpy(options->repmgrd_pid_file, value, MAXPGPATH);
else if (strcmp(name, "standby_disconnect_on_failover") == 0)
options->standby_disconnect_on_failover = parse_bool(value, name, error_list);
else if (strcmp(name, "connection_check_type") == 0)
{
if (strcasecmp(value, "ping") == 0)