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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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21
repmgr-client.c
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@@ -31,6 +31,7 @@
* NODE CHECK
* NODE REJOIN
* NODE SERVICE
* NODE CONTROL
*
* DAEMON STATUS
* DAEMON PAUSE
@@ -624,7 +625,7 @@ main(int argc, char **argv)
break;
/*--------------
/*---------------
* output options
*---------------
*/
@@ -640,6 +641,19 @@ main(int argc, char **argv)
runtime_options.optformat = true;
break;
/*---------------------------------
* undocumented options for testing
*----------------------------------
*/
case OPT_DISABLE_WAL_RECEIVER:
runtime_options.disable_wal_receiver = true;
break;
case OPT_ENABLE_WAL_RECEIVER:
runtime_options.enable_wal_receiver = true;
break;
/*-----------------------------
* options deprecated since 3.3
*-----------------------------
@@ -912,6 +926,8 @@ main(int argc, char **argv)
action = NODE_REJOIN;
else if (strcasecmp(repmgr_action, "SERVICE") == 0)
action = NODE_SERVICE;
else if (strcasecmp(repmgr_action, "CONTROL") == 0)
action = NODE_CONTROL;
}
else if (strcasecmp(repmgr_command, "CLUSTER") == 0)
@@ -1335,6 +1351,9 @@ main(int argc, char **argv)
case NODE_SERVICE:
do_node_service();
break;
case NODE_CONTROL:
do_node_control();
break;
/* CLUSTER */
case CLUSTER_SHOW: