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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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28
repmgr-client.h
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@@ -40,16 +40,17 @@
#define NODE_CHECK 14
#define NODE_SERVICE 15
#define NODE_REJOIN 16
#define CLUSTER_SHOW 17
#define CLUSTER_CLEANUP 18
#define CLUSTER_MATRIX 19
#define CLUSTER_CROSSCHECK 20
#define CLUSTER_EVENT 21
#define DAEMON_STATUS 22
#define DAEMON_PAUSE 23
#define DAEMON_UNPAUSE 24
#define DAEMON_START 25
#define DAEMON_STOP 26
#define NODE_CONTROL 17
#define CLUSTER_SHOW 18
#define CLUSTER_CLEANUP 19
#define CLUSTER_MATRIX 20
#define CLUSTER_CROSSCHECK 21
#define CLUSTER_EVENT 22
#define DAEMON_STATUS 23
#define DAEMON_PAUSE 24
#define DAEMON_UNPAUSE 25
#define DAEMON_START 26
#define DAEMON_STOP 27
/* command line options without short versions */
#define OPT_HELP 1001
@@ -97,7 +98,8 @@
#define OPT_VERSION_NUMBER 1043
#define OPT_DATA_DIRECTORY_CONFIG 1044
#define OPT_COMPACT 1045
#define OPT_DISABLE_WAL_RECEIVER 1046
#define OPT_ENABLE_WAL_RECEIVER 1047
/* deprecated since 3.3 */
#define OPT_DATA_DIR 999
@@ -202,6 +204,10 @@ static struct option long_options[] =
/* "cluster cleanup" options */
{"keep-history", required_argument, NULL, 'k'},
/* undocumented options for testing */
{"disable-wal-receiver", no_argument, NULL, OPT_DISABLE_WAL_RECEIVER},
{"enable-wal-receiver", no_argument, NULL, OPT_ENABLE_WAL_RECEIVER},
/* deprecated */
{"check-upstream-config", no_argument, NULL, OPT_CHECK_UPSTREAM_CONFIG},
{"no-conninfo-password", no_argument, NULL, OPT_NO_CONNINFO_PASSWORD},