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pluginsntpmunin

Munin - how to return unknown value from plugin

I want my munin plugin to report unknown values if the value can't be reported. What do I have to return?

  • "nan"
  • "-nan"
  • nothing at all, just skip returning a value
  • "unknown"
  • ...?

Nothing works for me.

Background: ntp_offset plugin fails if ntp is not running at all. I want to return unknown value and send an alert message.

Solution

  • I think the correct value to return is "U".

    This is briefly mentioned without explanation in the documentation:

    https://munin.readthedocs.io/en/latest/reference/plugin.html#fieldname-value