I'm running Freeradius Version 2.0.4 with sql_postgres and sql_log modules.
Through the redundant module I can use a postgres database (on a remote server) as a primary destination of my accounting messages and a sql_relay file as an alternative in case of my database failure.
Almost, everything works fine, meaning that if I stop the postgres process on my remote server, freeradius try to send accounting messages to it and as it receive messages from the server telling that the connection is refused, freeradius logs accounting sql request into the sql_relay file.
Now here's my problem: If I shutdown the server which host the postgres database, freeradius try to send request to it and as there's no answer from the server Freeradius doesn't pass through the SQL request through the sql_log module. It keeps on waiting for an answer infinitely.
When I launch freeradius whith the "freeradius -X" command, I can see the following message: Error: rlm_sql (sql_TMS): Failed to connect DB handle #0
It's very annoying because my backup solution doesn't handle the database server unavailability!
NB: I tried to use the "connect_failure_retry_delay" directive within the rlm_sql_postgres module but this has no effect!
Have a look at buffered-sql virtual server. Ivan Kalik Kalik Informatika ISP