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Make code to check standby join status available globally

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This makes it possible to check the standby join status from another
node, e.g. the promotion candidate during a switchover operation.
This commit is contained in:
Ian Barwick
2020-02-04 12:49:37 +09:00
parent e2a362a171
commit 7ed0a99d70
3 changed files with 136 additions and 62 deletions
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95
repmgr-action-node.c
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@@ -2118,6 +2118,7 @@ do_node_rejoin(void)
PQExpBufferData follow_output;
struct stat statbuf;
t_node_info primary_node_record = T_NODE_INFO_INITIALIZER;
t_node_info local_node_record = T_NODE_INFO_INITIALIZER;
bool success = true;
int follow_error_code = SUCCESS;
@@ -2228,6 +2229,21 @@ do_node_rejoin(void)
exit(ERR_BAD_CONFIG);
}
/*
* Fetch the local node record - we'll need this later, and it acts as an
* additional sanity-check that the node is known to the primary.
*/
if (get_node_record(primary_conn, config_file_options.node_id, &local_node_record) != RECORD_FOUND)
{
log_error(_("unable to retrieve node record for the local node"));
log_hint(_("check the local node is registered with the current primary \"%s\" (ID: %i)"),
primary_node_record.node_name,
primary_node_record.node_id);
PQfinish(upstream_conn);
PQfinish(primary_conn);
exit(ERR_BAD_CONFIG);
}
/*
* Sanity-check replication slot availability
*/
@@ -2520,79 +2536,34 @@ do_node_rejoin(void)
*/
if (runtime_options.no_wait == false)
{
int i;
for (i = 0; i < config_file_options.standby_reconnect_timeout; i++)
{
if (is_server_available(config_file_options.conninfo))
{
log_verbose(LOG_INFO, _("demoted primary is pingable"));
break;
}
if (i % 5 == 0)
{
log_verbose(LOG_INFO, _("waiting for node %i to respond to pings; %i of max %i attempts"),
config_file_options.node_id,
i + 1, config_file_options.node_rejoin_timeout);
}
else
{
log_debug("sleeping 1 second waiting for node %i to respond to pings; %i of max %i attempts",
config_file_options.node_id,
i + 1, config_file_options.node_rejoin_timeout);
}
sleep(1);
}
for (; i < config_file_options.node_rejoin_timeout; i++)
{
NodeAttached node_attached = is_downstream_node_attached(primary_conn,
config_file_options.node_name);
if (node_attached == NODE_ATTACHED)
{
log_verbose(LOG_INFO, _("node %i has attached to its upstream node"),
config_file_options.node_id);
break;
}
if (i % 5 == 0)
{
log_info(_("waiting for node \"%s\" (ID: %i) to connect to new primary; %i of max %i attempts"),
config_file_options.node_name,
config_file_options.node_id,
i + 1, config_file_options.node_rejoin_timeout);
log_detail(_("checking for record in node \"%s\"'s \"pg_stat_replication\" table where \"application_name\" is \"%s\""),
primary_node_record.node_name,
config_file_options.node_name);
}
else
{
log_debug("sleeping 1 second waiting for node %i to connect to new primary; %i of max %i attempts",
config_file_options.node_id,
i + 1, config_file_options.node_rejoin_timeout);
}
sleep(1);
}
standy_join_status join_success = check_standby_join(primary_conn,
&primary_node_record,
&local_node_record);
create_event_notification(primary_conn,
&config_file_options,
config_file_options.node_id,
"node_rejoin",
success,
join_success == JOIN_SUCCESS ? true : false,
follow_output.data);
if (success == false)
if (join_success != JOIN_SUCCESS)
{
termPQExpBuffer(&follow_output);
log_error(_("NODE REJOIN failed"));
log_detail(_("no record for local node \"%s\" found in node \"%s\"'s \"pg_stat_replication\" table"),
config_file_options.node_name,
primary_node_record.node_name);
if (join_success == JOIN_FAIL_NO_PING) {
log_detail(_("local node \"%s\" did not become available start after %i seconds"),
config_file_options.node_name,
config_file_options.node_rejoin_timeout);
}
else {
log_detail(_("no record for local node \"%s\" found in node \"%s\"'s \"pg_stat_replication\" table"),
config_file_options.node_name,
primary_node_record.node_name);
}
log_hint(_("check the PostgreSQL log on the local node"));
exit(ERR_REJOIN_FAIL);
}
}