monitor rac database services

I'm currently bussy writing a perl check to verify the status of a rac database service. When the service is down, while the target status is "online" a critical alert has to be given and when the service is running on an "available" instance instead of the preferred instance a warning has to be given.

I have written such a check in the past for 10gR2, but now I need one for 11gR2. As the output formats have changed a lot between 10.2 and 11.2, a large part of the script has to be rewritten (also instances seems to be not as tightly coupled to nodes in 11.2). So I was wondering if there is a (supported) way to query the cluster registry without depending on the output formats of srvctl / crsctl. Which does not seem to be build for easy use in scripts.

Information I need to retrieve is which instances and services exists for a database, what the available / preferred instances are of a service, the current state and target of a service and on which instance a service is currently running.

Kind regards,

Freek D'Hooge
Uptime
Oracle Database Administrator
email: freek.dhooge_at_uptime.be
tel +32(0)3 451 23 82
http://www.uptime.be
disclaimer: www.uptime.be/disclaimer

--
http://www.freelists.org/webpage/oracle-l