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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
dbutils.h
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@@ -415,6 +415,8 @@ bool set_config_bool(PGconn *conn, const char *config_param, bool state);
int guc_set(PGconn *conn, const char *parameter, const char *op, const char *value);
int guc_set_typed(PGconn *conn, const char *parameter, const char *op, const char *value, const char *datatype);
bool get_pg_setting(PGconn *conn, const char *setting, char *output);
bool alter_system_int(PGconn *conn, const char *name, int value);
bool pg_reload_conf(PGconn *conn);
/* server information functions */
bool get_cluster_size(PGconn *conn, char *size);
@@ -436,6 +438,7 @@ pid_t repmgrd_get_pid(PGconn *conn);
bool repmgrd_is_running(PGconn *conn);
bool repmgrd_is_paused(PGconn *conn);
bool repmgrd_pause(PGconn *conn, bool pause);
pid_t get_wal_receiver_pid(PGconn *conn);
/* extension functions */
ExtensionStatus get_repmgr_extension_status(PGconn *conn, t_extension_versions *extversions);