Implement threshold ranges

[MarcusCaepio]

Hi,
I noticed, that thresholds are not supported in the uptime checks. Imho, I should be able to get an alert, when -c < -w < value.
E.g. critical when uptime < 10m ; warning when uptime < 15m

Cheers,
Marcus

[mcktr]

Hi,

thanks for the feature request, this is a good idea for an enhancement. 👍

Are you sure about the comparison "direction" i.e. warning/critical when value is bigger? Shouldn't it be the other way around, so someone gets notified when the box restarts unexpectedly?

Best regards
Michael

[MarcusCaepio]

Indeed, you are right ^^ But on the other side, using ranges would make sense, too. Using ranges like defined in https://nagios-plugins.org/doc/guidelines.html#THRESHOLDFORMAT, a given tresh like X:Y could check if the uptime is < X (suddenly reboot) and uptime > Y (running for a long time without reboot)