1

I use check_mk_agent for monitoring a server with IPMI and the freeipmi-tools installed. As far as I can see, the monitoring randomly detects no value returned by the IPMI Sensor "Temperature_PCH_Temp".

That's a problem since it results in a CRITICAL state triggering a notification. The interruption lasts only over one check, the following is always OK. The temperature is in no edge area and neither the readings before the fail nor after show a Temp that is tending to overrun a treshold.

Has someone an idea on what could be the reason for this behaviour and how prevent it?

4 Answers 4

1

Version 01.78 of the Supermicro IPMI for my X9DRD-iF. You can download it at http://www.supermicro.com/about/policies/disclaimer.cfm?url=/support/resources/getfile.aspx?ID=1940

0

Sounds like a hardware fault (flaky IPMI board, bad sensor) -- You should contact your hardware vendor and report the problem to see if you can get a replacement.

2
  • I informed the responsible contact person that will handle the replacement in case you're right. Let's see what happens... Nov 16, 2012 at 19:37
  • @JulianKessel In case I'm wrong, they can probably also get you to a support person who can give you a more definite answer :-)
    – voretaq7
    Nov 16, 2012 at 20:02
0

The FreeIPMI ipmi-sensor/ipmimonitoring tools reports N/A when it finds a sensor that does not have a reading returned. Although rare (and as voretaq7 says, it's likely a busted sensor) it's not unreasonable for an IPMI sensor to simply say "I don't have a reading for you right now."

I can't speak to what is in the check_mk_agent script, it's possible it considers "N/A" critical and reports it back that way.

It's also possible the remote system (if busted) is returning illegal values back to you, which could lead to a "CRITICAL" state when --output-sensor-state is used.

You may want to look at and see if the --ignore-not-available-sensors or --ignore-unrecognized-events options will help you in this situation.

1
  • That's an option eventually, but I found an other solution which lies in the IMPI firmware itself. Nov 30, 2012 at 15:00
0

You do have configured retries for the check - so it doesn't alert you just because it had a short hickup, right?

btw, I think Albert Chu is correct about N/A being handled incorrectly. It's probably only evaluated at first inventory of the system; there's a mail with relevant patches by a user named Bernhard Schmidt on the check_mk mailing lists.

But, as this thread proves, such problems are basically always just related to hardware issues anyway :)

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.