Thoughts about a custom plugin

[Paulus, Jake]

You should really look into NRPE (Nagios Remote Plugin Execution)
http://nagios.sourceforge.net/docs/3_0/addons.html#nrpe

There are alternate versions of NRPE that run on Windows, etc. if you
must do that. Check out NagiosExchange.org for those.

You should find that you can use normal plugins you already use
elsewhere with NRPE to do what you need.

-Jake

-----Original Message-----
From: nagios-users-bounces at lists.sourceforge.net
[mailto:nagios-users-bounces at lists.sourceforge.net] On Behalf Of stan
Sent: Sunday, July 20, 2008 10:29 AM
To: nagios List
Cc: Stewart Flood
Subject: [Nagios-users] Thoughts about a custom plugin

I have a number of isolated networks, that is networks which are
deliberately non-routable to. On each of these networks, I have a single
host that has a 2nd NIC thta is on the general network. I don't can't to
turn on forwarding on this host. I would like to monitor some statuses
on
the machines on the isolated networks.

I am thinking of doing this using a Nagios plugin. My first thoughts on
this plugin are to have the plugin execute a script on the dual homed
machines. This script would, as a first cut, ping the internal machines,
and
return up/down statuses. Later I might want too expand on this by having
the script do some other checks on the isolated machines.

After having looked at the way Nagios plugins work, i have a couple of
concerns about this design. The first is the rule that says the status
returned by a plugin should be less than 8 characters. The 2nd is that,
for
the first version of the remote script, if a machine is down, the ping
could
take a while to timeout.

I can see how to address the 2nd concern by having a "checker script" on
the dual homed machine, that maintains a "state" file, which the script
called
by the Nagios plugin could simply read. But how can I address the firs
concern?


Any other thoughts to improve this design?

-- 
One of the main causes of the fall of the roman empire was that, lacking
zero, they had no way to indicate successful termination of their C
programs.

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