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Add "repmgr node status"

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Outputs an overview of a node's status, and emits warnings if any
issues detected.
This commit is contained in:
Ian Barwick
2017-07-25 00:12:16 +09:00
parent 93c35618a2
commit 8a2e4db1bc
8 changed files with 290 additions and 11 deletions
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38
dbutils.c
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@@ -2005,6 +2005,7 @@ delete_node_record(PGconn *conn, int node)
log_verbose(LOG_DEBUG, "delete_node_record():\n %s", query.data);
res = PQexec(conn, query.data);
termPQExpBuffer(&query);
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{
@@ -2019,6 +2020,43 @@ delete_node_record(PGconn *conn, int node)
return true;
}
void
get_node_replication_stats(PGconn *conn, t_node_info *node_info)
{
PQExpBufferData query;
PGresult *res;
initPQExpBuffer(&query);
appendPQExpBuffer(
&query,
" SELECT current_setting('max_wal_senders')::INT AS max_wal_senders, "
" (SELECT COUNT(*) FROM pg_catalog.pg_stat_replication) AS attached_wal_receivers, "
" current_setting('max_replication_slots')::INT AS max_replication_slots, "
" (SELECT COUNT(*) FROM pg_catalog.pg_replication_slots WHERE active = TRUE) AS active_replication_slots, "
" (SELECT COUNT(*) FROM pg_catalog.pg_replication_slots WHERE active = FALSE) AS inactive_replication_slots ");
res = PQexec(conn, query.data);
termPQExpBuffer(&query);
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
log_warning(_("unable to retrieve node replication statistics:\n %s"),
PQerrorMessage(conn));
PQclear(res);
return;
}
node_info->max_wal_senders = atoi(PQgetvalue(res, 0, 0));
node_info->attached_wal_receivers = atoi(PQgetvalue(res, 0, 1));
node_info->max_replication_slots = atoi(PQgetvalue(res, 0, 2));
node_info->active_replication_slots = atoi(PQgetvalue(res, 0, 3));
node_info->inactive_replication_slots = atoi(PQgetvalue(res, 0, 4));
return;
}
void
clear_node_info_list(NodeInfoList *nodes)