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repmgrd: add option "connection_check_type"

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This enable selection of the method repmgrd uses to check whether the upstream
node is available. Possible values are:

 - "ping" (default): uses PQping() to check server availability
 - "connection":  executes a query on the connection to check server
   availability (similar to repmgr3.x).
This commit is contained in:
Ian Barwick
2019-03-06 12:07:30 +09:00
parent 4f83111033
commit 63f7ad546e
11 changed files with 150 additions and 23 deletions
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14
repmgrd-physical.c
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@@ -831,7 +831,7 @@ monitor_streaming_standby(void)
while (true)
{
log_verbose(LOG_DEBUG, "checking %s", upstream_node_info.conninfo);
if (is_server_available(upstream_node_info.conninfo) == true)
if (check_upstream_connection(upstream_conn, upstream_node_info.conninfo) == true)
{
set_upstream_last_seen(local_conn);
}
@@ -1030,9 +1030,10 @@ monitor_streaming_standby(void)
upstream_node_info.node_id,
degraded_monitoring_elapsed);
if (is_server_available(upstream_node_info.conninfo) == true)
if (check_upstream_connection(upstream_conn, upstream_node_info.conninfo) == true)
{
upstream_conn = establish_db_connection(upstream_node_info.conninfo, false);
if (config_file_options.connection_check_type == CHECK_PING)
upstream_conn = establish_db_connection(upstream_node_info.conninfo, false);
if (PQstatus(upstream_conn) == CONNECTION_OK)
{
@@ -1604,7 +1605,7 @@ monitor_streaming_witness(void)
while (true)
{
if (is_server_available(upstream_node_info.conninfo) == false)
if (check_upstream_connection(upstream_conn, upstream_node_info.conninfo) == false)
{
if (upstream_node_info.node_status == NODE_STATUS_UP)
{
@@ -1693,9 +1694,10 @@ monitor_streaming_witness(void)
upstream_node_info.node_id,
degraded_monitoring_elapsed);
if (is_server_available(upstream_node_info.conninfo) == true)
if (check_upstream_connection(primary_conn, upstream_node_info.conninfo) == true)
{
primary_conn = establish_db_connection(upstream_node_info.conninfo, false);
if (config_file_options.connection_check_type == CHECK_PING)
primary_conn = establish_db_connection(upstream_node_info.conninfo, false);
if (PQstatus(primary_conn) == CONNECTION_OK)
{