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Add "repmgr node check --downstream"

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This commit is contained in:
Ian Barwick
2017-08-15 15:50:46 +09:00
parent 10ef30096c
commit 554673e83e
8 changed files with 169 additions and 11 deletions
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47
dbutils.c
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@@ -2426,6 +2426,53 @@ get_node_replication_stats(PGconn *conn, t_node_info *node_info)
}
bool
is_downstream_node_attached(PGconn *conn, char *node_name)
{
PQExpBufferData query;
PGresult *res = NULL;
int c = 0;
initPQExpBuffer(&query);
appendPQExpBuffer(
&query,
" SELECT COUNT(*) FROM pg_catalog.pg_stat_replication "
" WHERE application_name = '%s'",
node_name);
res = PQexec(conn, query.data);
termPQExpBuffer(&query);
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
log_verbose(LOG_WARNING, _("unable to query pg_stat_replication"));
log_detail("%s", PQerrorMessage(conn));
PQclear(res);
return false;
}
if (PQntuples(res) != 1)
{
log_verbose(LOG_WARNING, _("unexpected number of tuples (%i) returned"), PQntuples(res));
PQclear(res);
return false;
}
c = atoi(PQgetvalue(res, 0, 0));
PQclear(res);
if (c == 0)
{
log_verbose(LOG_WARNING, _("node \"%s\" not found in \"pg_stat_replication\""), node_name);
return false;
}
if (c > 1)
log_verbose(LOG_WARNING, _("multiple entries with \"application_name\" set to \"%s\" found in \"pg_stat_replication\""),
node_name);
return true;
}
void
clear_node_info_list(NodeInfoList *nodes)