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repmgrd: improve failover handling

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Make retry frequency/interval configurable as per streaming replication.
This commit is contained in:
Ian Barwick
2017-07-17 14:56:52 +09:00
parent a56bb41891
commit 48a0aa3bf7
2 changed files with 55 additions and 6 deletions
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60
repmgrd-bdr.c
View File

@@ -31,6 +31,8 @@ monitor_bdr(void)
NodeInfoList nodes = T_NODE_INFO_LIST_INITIALIZER;
t_bdr_node_info bdr_node_info = T_BDR_NODE_INFO_INITIALIZER;
RecordStatus record_status;
NodeInfoListCell *cell;
PQExpBufferData event_details;
/* sanity check local database */
log_info(_("connecting to local database '%s'"),
@@ -129,13 +131,18 @@ monitor_bdr(void)
*/
get_all_node_records(local_conn, &nodes);
/* we're expecting all (both) nodes to be up */
for (cell = nodes.head; cell; cell = cell->next)
{
cell->node_info->node_status = NODE_STATUS_UP;
}
log_debug("main_loop_bdr() monitoring local node %i", config_file_options.node_id);
log_info(_("starting continuous bdr node monitoring"));
while (true)
{
NodeInfoListCell *cell;
/* monitoring loop */
log_verbose(LOG_DEBUG, "bdr check loop...");
@@ -168,14 +175,53 @@ monitor_bdr(void)
{
if (is_server_available(cell->node_info->conninfo) == false)
{
instr_time upstream_node_unreachable_start;
/* node is down, we were expecting it to be up */
if (cell->node_info->node_status == NODE_STATUS_UP)
{
instr_time node_unreachable_start;
INSTR_TIME_SET_CURRENT(node_unreachable_start);
INSTR_TIME_SET_CURRENT(upstream_node_unreachable_start);
cell->node_info->node_status = NODE_STATUS_DOWN;
if (cell->node_info->conn != NULL)
{
PQfinish(cell->node_info->conn);
cell->node_info->conn = NULL;
}
// XXX improve
log_warning("connection problem! to node %i", cell->node_info->node_id);
do_bdr_failover(&nodes, cell->node_info);
cell->node_info->conn = try_reconnect(cell->node_info);
/* Node has recovered - log and continue */
if (cell->node_info->node_status == NODE_STATUS_UP)
{
int node_unreachable_elapsed = calculate_elapsed(node_unreachable_start);
initPQExpBuffer(&event_details);
appendPQExpBuffer(&event_details,
_("reconnected to node %i after %i seconds"),
cell->node_info->node_id,
node_unreachable_elapsed);
log_notice("%s", event_details.data);
create_event_notification(cell->node_info->conn,
&config_file_options,
config_file_options.node_id,
"repmgrd_upstream_reconnect",
true,
event_details.data);
termPQExpBuffer(&event_details);
goto loop;
}
/* still down after reconnect attempt(s) */
if (cell->node_info->node_status == NODE_STATUS_DOWN)
{
do_bdr_failover(&nodes, cell->node_info);
goto loop;
}
}
}
}
break;
@@ -193,6 +239,8 @@ monitor_bdr(void)
}
}
loop:
if (got_SIGHUP)
{
/*

1
repmgrd-physical.c
View File

@@ -503,6 +503,7 @@ monitor_streaming_standby(void)
PQfinish(upstream_conn);
upstream_conn = try_reconnect(&upstream_node_info);
/* Node has recovered - log and continue */
if (upstream_node_info.node_status == NODE_STATUS_UP)
{
int upstream_node_unreachable_elapsed = calculate_elapsed(upstream_node_unreachable_start);