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Initial support for physical replication slots

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Todo:
 - if slots specified in repmgr.conf, verify server version
 - store generated slot name in `repl_nodes` table
This commit is contained in:
Ian Barwick
2015-02-02 15:53:53 +09:00
parent 01360c3d39
commit 2ece014952
6 changed files with 106 additions and 13 deletions
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38
repmgrd.c
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@@ -1320,11 +1320,11 @@ do_primary_failover(void)
terminate(ERR_DB_QUERY);
}
/* and reconnect to the local database */
my_local_conn = establish_db_connection(local_options.conninfo, true);
/* and reconnect to the local database */
my_local_conn = establish_db_connection(local_options.conninfo, true);
/* update node information to reflect new status */
if(update_node_record_set_primary(my_local_conn, node_info.node_id, failed_primary.node_id) == false)
/* update node information to reflect new status */
if(update_node_record_set_primary(my_local_conn, node_info.node_id, failed_primary.node_id) == false)
{
terminate(ERR_DB_QUERY);
}
@@ -1345,7 +1345,7 @@ do_primary_failover(void)
log_debug(_("follow command is: \"%s\"\n"), local_options.follow_command);
/*
* New Primary need some time to be promoted. The follow command
* The new primary may some time to be promoted. The follow command
* should take care of that.
*/
if (log_type == REPMGR_STDERR && *local_options.logfile)
@@ -1353,6 +1353,28 @@ do_primary_failover(void)
fflush(stderr);
}
/*
* If 9.4 or later, and replication slots in use, we'll need to create a
* slot on the new primary
*/
new_primary_conn = establish_db_connection(best_candidate.conninfo_str, true);
if(local_options.use_replication_slots)
{
// ZZZ store slot name in `repl_nodes`
char repmgr_slot_name[MAXLEN];
maxlen_snprintf(repmgr_slot_name, "repmgr_slot_%i", local_options.node);
if(create_replication_slot(new_primary_conn, repmgr_slot_name) == false)
{
log_err(_("Unable to create slot '%s' on the primary node: %s\n"),
repmgr_slot_name,
PQerrorMessage(new_primary_conn));
PQfinish(new_primary_conn);
terminate(ERR_DB_QUERY);
}
}
r = system(local_options.follow_command);
if (r != 0)
{
@@ -1361,10 +1383,8 @@ do_primary_failover(void)
terminate(ERR_BAD_CONFIG);
}
/* and reconnect to the local database */
my_local_conn = establish_db_connection(local_options.conninfo, true);
new_primary_conn = establish_db_connection(best_candidate.conninfo_str, true);
/* and reconnect to the local database */
my_local_conn = establish_db_connection(local_options.conninfo, true);
/* update node information to reflect new status */
update_node_record_set_upstream(new_primary_conn, node_info.node_id, best_candidate.node_id);