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braindump
Asked: 2010-07-17 03:28:33 +0800 CST

Let Nagios check not-allways-on workstations

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we try to monitor the file age on some of our workstations. Works fine with NSClient++ - but we do not want to get any CRITICALs when the computer is shut down.

For the host, we do have a dummy check, returning OK every check. But when the workstation is offline, the check for the file age fails with a 'connection refused'.

Do you have any hints to avoid those CRITICALs?

nagios

3 Answers

  1. Best Answer

    If the service is associated with the host(name), if the check-host-alive (or whatever you've configured) test fails, the service alerts won't be sent. Remember to add a margin of error in your max_checks to account for a situation where the computer is shutting down, but still responding to pings (or whatever you use for check-host-alive).

    Alternately, if your file-age-checker only issues WARNINGs, not CRITICALs, where WARNINGs are file-age-out-of-bounds errors, while CRITICALs are host-unreachable errors, just mask off the CRITICALs:

    service_notification_options w,u,r

    That said, what you should really do, if that's your goal, is to rewrite the plugin to return UNKNOWN for that circumstance, in which case it'd be:

    service_notification_options c,w,r
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  2. Are the workstations switched off during predictable times? i.e, are they only going to be on from 9am-5pm, or something similar? If so, you can define a time period in Nagios and apply it to the workstations; then they'll only get checked within that time period.

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  3. Have you tried with the -u option in check_nrpe?

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