Monitoring cross-server services?

[Carroll, Jim P [Contractor]]

Sounds like defining service dependencies might be the route to go:

http://nagios.sourceforge.net/docs/1_0/dependencies.html

jc

> -----Original Message-----
> From: Steven Grimm [mailto:koreth-nagios at midwinter.com]
> Sent: Monday, January 20, 2003 5:17 PM
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] Monitoring cross-server services?
> 
> 
> What's the accepted way to set up monitoring of distributed 
> or peer-to-peer
> services?  For example, I have a server app that connects to copies of
> itself on other hosts to keep its data synchronized.  I'd 
> ideally like to
> make sure that each host is connected to all the peers it's 
> supposed to
> talk to.
> 
> The problem is, if hosts A, B, and C are all connected to 
> each other, I
> don't want the services on hosts A and C to show up as broken 
> if host B
> crashes, since I'll have already gotten a notification about 
> host B and
> the error indications on the other two hosts will just be distracting
> clutter on the status web page.
> 
> On the other hand, if there's a connectivity problem between 
> hosts A and
> B but both hosts are healthy and reachable from the monitoring host, I
> *do* want the error condition to be flagged.  (Application-level
> connectivity, I mean, not necessarily IP connectivity.)
> 
> The best solution I've come up with is to wrap a local plugin 
> around the
> call to the plugin on the remote host that checks the status 
> of the app;
> the remote plugin reports back a list of peers that the app isn't
> connected to, and the local plugin checks the Nagios status 
> file to make
> sure the app is listed as OK on all those peers.  If all the problem
> peers are offline, the warning/critical result from the remote plugin
> is suppressed.
> 
> Anyone have a better approach?
> 
> -Steve
> 
> 
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