Running java plugins in nagios

[Thomas Schimpke]

Hi Sean,

someone else had written a nagios plugin and experienced the expected
performance problems. There are some tuning parameters, though. But I
think, that as soon as I use some 10 Java based checks, I'll be out of
luck and the monitoring will break.

I also thought, that I should turn the plugin into a server, create some
threads for the individual SAP checks and then use passive checks from
nagios. The problem with this approach is, that there's another
component, that can fail -- but your suggestion, to check the server is
fine. I like the idea...

Thanks,

Thomas

On Tue, 2004-09-07 at 19:45, Sean Dilda wrote:
> On Mon, 2004-09-06 at 03:03, Thomas Schimpke wrote:
> > Hello,
> > 
> > is somebody on the list, who has some experience with running java
> > plugins in nagios ? The technical integration is not the problem, but
> > I'm having concerns about the java overhead (loading the VM,...). My
> > fear is, that my monitoring server will simply be overloaded as soon, as
> > there are some 10 java based checks running.  
> 
> Have you considered turning your java plugin into a daemon that runs on
> the nagios server, does its own polling of SAP, then writes the results
> as passive checks.  This way you'd only ever have on java VM running,
> and you'd rarely have to launch it.
> 
> You could even expand that by turning on freshness checking and have the
> check script for that be something that actually starts the java daemon
> back up if it exited for any reason.  Although you'd want to use a
> lockfile if you did that so you'd never get multiple copies of the
> daemon running at once.
> 
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