[Linux-cluster] Monitoring Failovers

Jeff Stoner jstoner at opsource.net
Fri Feb 20 19:43:42 UTC 2009

I implemented a monitor for a clustered MySQL service. Wrote it up at
As it implies, it's specific to monitoring MySQL but the methodology
could be applied to any service (as long as something returns
host-specific information.)

Jeff Stoner | Performance Engineer 
24x7: 800.664.9974 | jstoner at opsource.net
OpSource, Inc. | www.opsource.net | "The Business of Web Operations"


> -----Original Message-----
> From: linux-cluster-bounces at redhat.com 
> [mailto:linux-cluster-bounces at redhat.com] On Behalf Of Burton Simonds
> Sent: Friday, February 20, 2009 11:05 AM
> To: linux clustering
> Subject: [Linux-cluster] Monitoring Failovers
> I am in the process of setting up Nagios for system monitoring, and I
> would like to have a way to know if a failover has occurred.  If
> everything works as it should, there be a minimal impact on the
> services.  Right now it looks like my best bet is basically scrape the
> logs and look for the failover messages there and trigger an alarm.
> I was wondering if anyone else has done anything.  I found in an
> archive a check_rhcs script that I am going to employ (which looks
> pretty cool), but that just looks at the status of the services.  I
> want to either compare the current status to the previous status or
> have something monitoring the cluster an pushes the alert to Nagios.
> Thanks,
> B
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