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repmgrd: always unset upstream node ID when monitoring a primary

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This commit is contained in:
Ian Barwick
2019-04-12 12:26:39 +09:00
parent 1a344d488a
commit 27803f93ff
6 changed files with 74 additions and 1 deletions
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34
repmgr.c
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@@ -119,6 +119,9 @@ PG_FUNCTION_INFO_V1(get_upstream_last_seen);
Datum get_upstream_node_id(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(get_upstream_node_id);
Datum set_upstream_node_id(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(set_upstream_node_id);
Datum notify_follow_primary(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(notify_follow_primary);
@@ -427,7 +430,6 @@ get_upstream_last_seen(PG_FUNCTION_ARGS)
}
Datum
get_upstream_node_id(PG_FUNCTION_ARGS)
{
@@ -443,6 +445,36 @@ get_upstream_node_id(PG_FUNCTION_ARGS)
PG_RETURN_INT32(upstream_node_id);
}
Datum
set_upstream_node_id(PG_FUNCTION_ARGS)
{
int upstream_node_id = UNKNOWN_NODE_ID;
int local_node_id = UNKNOWN_NODE_ID;
if (!shared_state)
PG_RETURN_NULL();
if (PG_ARGISNULL(0))
PG_RETURN_NULL();
upstream_node_id = PG_GETARG_INT32(0);
LWLockAcquire(shared_state->lock, LW_SHARED);
local_node_id = shared_state->local_node_id;
LWLockRelease(shared_state->lock);
if (local_node_id == upstream_node_id)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
(errmsg("upstream node id cannot be the same as the local node id"))));
LWLockAcquire(shared_state->lock, LW_EXCLUSIVE);
shared_state->upstream_node_id = upstream_node_id;
LWLockRelease(shared_state->lock);
PG_RETURN_VOID();
}
/* ===================*/
/* failover functions */