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Improve logging output during failover process

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This commit is contained in:
Ian Barwick
2017-08-24 22:44:03 +09:00
parent 7a00ad930a
commit fcd111ac4c
7 changed files with 80 additions and 17 deletions
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39
repmgr.c
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@@ -46,6 +46,7 @@ typedef struct repmgrdSharedState
{
LWLockId lock; /* protects search/modification */
TimestampTz last_updated;
int local_node_id;
/* streaming failover */
NodeState node_state;
NodeVotingStatus voting_status;
@@ -66,6 +67,9 @@ void _PG_fini(void);
static void repmgr_shmem_startup(void);
Datum set_local_node_id(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(set_local_node_id);
Datum standby_set_last_updated(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(standby_set_last_updated);
@@ -107,9 +111,9 @@ PG_FUNCTION_INFO_V1(unset_bdr_failover_handler);
void
_PG_init(void)
{
elog(INFO, "repmgr init");
elog(DEBUG1, "repmgr init");
// error here?
/* error here? */
if (!process_shared_preload_libraries_in_progress)
return;
@@ -128,6 +132,8 @@ _PG_init(void)
shmem_startup_hook = repmgr_shmem_startup;
}
/*
* Module unload callback
*/
@@ -171,6 +177,7 @@ repmgr_shmem_startup(void)
shared_state->lock = LWLockAssign();
#endif
shared_state->local_node_id = UNKNOWN_NODE_ID;
shared_state->current_electoral_term = 0;
shared_state->voting_status = VS_NO_VOTE;
shared_state->candidate_node_id = UNKNOWN_NODE_ID;
@@ -186,6 +193,21 @@ repmgr_shmem_startup(void)
/* monitoring functions */
/* ==================== */
Datum
set_local_node_id(PG_FUNCTION_ARGS)
{
int local_node_id = PG_GETARG_INT32(0);
if (!shared_state)
PG_RETURN_NULL();
LWLockAcquire(shared_state->lock, LW_SHARED);
shared_state->local_node_id = local_node_id;
LWLockRelease(shared_state->lock);
PG_RETURN_VOID();
}
/* update and return last updated with current timestamp */
Datum
standby_set_last_updated(PG_FUNCTION_ARGS)
@@ -254,7 +276,8 @@ request_vote(PG_FUNCTION_ARGS)
PG_RETURN_NULL();
}
elog(INFO, "requesting node id is %i for electoral term %i (our term: %i)",
elog(INFO, "node %i has received request from node %i for electoral term %i (our term: %i)",
shared_state->local_node_id,
requesting_node_id, current_electoral_term,
shared_state->current_electoral_term);
@@ -270,7 +293,7 @@ request_vote(PG_FUNCTION_ARGS)
"SELECT pg_catalog.pg_last_xlog_receive_location()");
#endif
elog(INFO, "query: %s", query.data);
elog(DEBUG1, "query: %s", query.data);
ret = SPI_execute(query.data, true, 0);
if (ret < 0)
@@ -285,7 +308,7 @@ request_vote(PG_FUNCTION_ARGS)
1, &isnull));
elog(INFO, "Our LSN is %X/%X",
elog(DEBUG1, "our LSN is %X/%X",
(uint32) (our_lsn >> 32),
(uint32) our_lsn);
@@ -388,10 +411,12 @@ notify_follow_primary(PG_FUNCTION_ARGS)
if (!shared_state)
PG_RETURN_NULL();
elog(INFO, "received notification to follow node %i", primary_node_id);
LWLockAcquire(shared_state->lock, LW_SHARED);
elog(INFO, "node %i received notification to follow node %i",
shared_state->local_node_id,
primary_node_id);
/* Explicitly set the primary node id */
shared_state->candidate_node_id = primary_node_id;
shared_state->follow_new_primary = true;