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repmgrd: handle local node failure

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This commit is contained in:
Ian Barwick
2017-08-28 10:31:43 +09:00
parent 754084c814
commit 4a11551c2f
1 changed files with 99 additions and 22 deletions
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121
repmgrd-physical.c
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@@ -56,7 +56,7 @@ static void notify_followers(NodeInfoList *standby_nodes, int follow_node_id);
static t_node_info *poll_best_candidate(NodeInfoList *standby_nodes);
static void check_connection(t_node_info *node_info, PGconn *conn);
static void check_connection(t_node_info *node_info, PGconn **conn);
static bool wait_primary_notification(int *new_primary_id);
static FailoverState follow_new_primary(int new_primary_id);
@@ -410,7 +410,15 @@ monitor_streaming_standby(void)
* to monitor. This is a "fix-the-config" situation, not a lot else we
* can do.
*/
if (record_status != RECORD_FOUND)
if (record_status == RECORD_NOT_FOUND)
{
log_error(_("no record found for upstream node (ID: %i), terminating"),
local_node_info.upstream_node_id);
log_hint(_("ensure the upstream node is registered correctly"));
PQfinish(local_conn);
exit(ERR_DB_CONN);
}
else if (record_status == RECORD_ERROR)
{
log_error(_("unable to retrieve record for upstream node (ID: %i), terminating"),
local_node_info.upstream_node_id);
@@ -423,7 +431,7 @@ monitor_streaming_standby(void)
upstream_conn = establish_db_connection(upstream_node_info.conninfo, false);
/*
* Upstream node must be running.
* Upstream node must be running at repmgrd startup.
*
* We could possibly have repmgrd skip to degraded monitoring mode until it
* comes up, but there doesn't seem to be much point in doing that.
@@ -663,7 +671,6 @@ monitor_streaming_standby(void)
if (local_node_info.type == PRIMARY)
{
int degraded_monitoring_elapsed = calculate_elapsed(degraded_monitoring_start);
log_notice(_("resuming monitoring as primary node after %i seconds"),
@@ -770,9 +777,80 @@ monitor_streaming_standby(void)
* TODO: add timeout, after which we run in degraded state
*/
check_connection(&local_node_info, local_conn);
check_connection(&local_node_info, &local_conn);
if (config_file_options.monitoring_history == true)
if (PQstatus(local_conn) != CONNECTION_OK)
{
if (local_node_info.active == true)
{
if (PQstatus(primary_conn) == CONNECTION_OK)
{
if (update_node_record_set_active(primary_conn, local_node_info.node_id, false) == true)
{
PQExpBufferData event_details;
initPQExpBuffer(&event_details);
local_node_info.active = false;
appendPQExpBuffer(
&event_details,
_("unable to connect to local node \"%s\" (ID: %i), marking inactive"),
local_node_info.node_name,
local_node_info.node_id);
log_warning("%s", event_details.data)
create_event_notification(
primary_conn,
&config_file_options,
local_node_info.node_id,
"standby_failure",
false,
event_details.data);
termPQExpBuffer(&event_details);
}
}
}
}
else {
if (local_node_info.active == false)
{
if (PQstatus(primary_conn) == CONNECTION_OK)
{
if (update_node_record_set_active(primary_conn, local_node_info.node_id, true) == true)
{
PQExpBufferData event_details;
initPQExpBuffer(&event_details);
local_node_info.active = true;
appendPQExpBuffer(
&event_details,
_("reconnect to local node \"%s\" (ID: %i), marking active"),
local_node_info.node_name,
local_node_info.node_id);
log_warning("%s", event_details.data)
create_event_notification(
primary_conn,
&config_file_options,
local_node_info.node_id,
"standby_recovery",
true,
event_details.data);
termPQExpBuffer(&event_details);
}
}
}
}
if (PQstatus(local_conn) == CONNECTION_OK && config_file_options.monitoring_history == true)
update_monitoring_history();
sleep(config_file_options.monitor_interval_secs);
@@ -1150,8 +1228,7 @@ do_upstream_standby_failover(void)
* the node's upstream is not available
*/
check_connection(&primary_node_info, primary_conn);
check_connection(&primary_node_info, &primary_conn);
/* grandparent upstream is inactive */
if (primary_node_info.active == false)
@@ -1975,32 +2052,32 @@ reset_node_voting_status(void)
static void
check_connection(t_node_info *node_info, PGconn *conn)
check_connection(t_node_info *node_info, PGconn **conn)
{
// consolidate below code
if (is_server_available(node_info->conninfo) == false)
{
log_warning(_("connection to node %i lost"), node_info->node_id);
if (conn != NULL)
{
PQfinish(conn);
conn = NULL;
}
}
if (PQstatus(conn) != CONNECTION_OK)
if (PQstatus(*conn) != CONNECTION_OK)
{
log_info(_("attempting to reconnect"));
conn = establish_db_connection(node_info->conninfo, false);
log_info(_("attempting to reconnect to node \"%s\" (ID: %i)"),
node_info->node_name,
node_info->node_id);
*conn = establish_db_connection(node_info->conninfo, false);
if (PQstatus(conn) != CONNECTION_OK)
if (PQstatus(*conn) != CONNECTION_OK)
{
log_warning(_("reconnection failed"));
*conn = NULL;
log_warning(_("reconnection to node \"%s\" (ID: %i) failed"),
node_info->node_name,
node_info->node_id);
}
else
{
log_info(_("reconnected"));
log_info(_("reconnected to node \"%s\" (ID: %i)"),
node_info->node_name,
node_info->node_id);
}
}
}