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Check primary connection

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Verify that existing primary connection is valid, and if not
attempt to find and connect to the current primary node.
This commit is contained in:
Ian Barwick
2015-01-22 12:20:23 +09:00
parent 1e6f1a88b0
commit 3be8bf8e4c
1 changed files with 44 additions and 1 deletions
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45
repmgrd.c
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@@ -1434,6 +1434,8 @@ set_local_node_failed(void)
{
PGresult *res;
char sqlquery[QUERY_STR_LEN];
int active_primary_node_id = -1;
char primary_conninfo[MAXLEN];
if (!check_connection(primary_conn, "master"))
{
@@ -1447,7 +1449,48 @@ set_local_node_failed(void)
* intervening period
*/
// ZZZ TODO
sqlquery_snprintf(sqlquery,
"SELECT id, conninfo "
" FROM %s.repl_nodes "
" WHERE type = 'primary' "
" AND active IS TRUE ",
get_repmgr_schema_quoted(primary_conn));
res = PQexec(primary_conn, sqlquery);
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
log_err(_("Unable to obtain active primary record: %s\n"),
PQerrorMessage(primary_conn));
return false;
}
if(!PQntuples(res))
{
log_err(_("No active primary record found\n"));
return false;
}
active_primary_node_id = atoi(PQgetvalue(res, 0, 0));
strncpy(primary_conninfo, PQgetvalue(res, 0, 1), MAXLEN);
PQclear(res);
if(active_primary_node_id != primary_options.node)
{
log_notice(_("Current active primary is %i; attempting to connect\n"),
active_primary_node_id);
PQfinish(primary_conn);
primary_conn = establish_db_connection(primary_conninfo, false);
if(PQstatus(primary_conn) != CONNECTION_OK)
{
log_err(_("Unable to connect to active primary\n"));
return false;
}
log_notice(_("Connection to new primary was successful\n"));
}
/*
* Attempt to set own record as inactive