Plugin that will test nagios.cfg

[Thomas Guyot-Sionnest]

On 21/06/07 05:20 PM, Patrick Morris wrote:
> Arno Lehmann schrieb am Donnerstag, den 21. Juni 2007:
> 
>> Hi,
>>
>> chiel schrieb:
>>> I'm looking for a plugin that will check if the nagios.cfg is ok.
>>> So besecauly run this command: "/usr/local/nagios/bin/nagios -v 
>>> /usr/local/nagios/etc/nagios.cfg". Is there a plugin for this?
>> Wouldn't it be better to check this in the cron job itself? Nagios 
>> won't help you much if it crashes because of a broken config.
>>
>> The cron job could, naturally, report problems as passive results to 
>> Nagios...
> 
> Nagios will never crash because of a broken config if it's running; 
> it just won't load that config.  Checking from a cron job works, too,
> but there's no reason Nagios can't also check to see if the on-disk
> config is valid.

Not true. I noticed more than once that nagios would bail out on
restarts with broken configs (with versions ranging between 2.0 beta to
2.4) and I just verified with v2.7.

About the other problem, why not have the scripts restart nagios
themselves after checking that the config isn't broken? As it was
mentioned in another thread just use the return status:

#!/bin/bash
if nagios -v nagios.cfg; then
  killall -HUP nagios
else
  echo "Nagios config is broken!"
  exit 1
fi


#!/usr/bin/perl
`nagios -v nagios.cfg`;
if ($?) {
  die("Nagios config is broken!");
}
killall -HUP nagios



If you have different scripts running you can also write a standalone
script that does the job. It could also send back the result to Nagios.

Thomas

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