I managed to figure this out. The key is to use the on() function which
ignores the labels. The query now looks like this:
up{job="calculator"} == 0 and on() count(hour(vector(time())) >= 1 and
hour(vector(time())) < 13)
On Monday, February 8, 2021 at 3:33:51 PM UTC-6 Chad Thielen wrote:
> Hello,
>
> I'm having some trouble writing a query for an alerting rule that we only
> want to run at certain times of the day. This is what I original had, which
> works, but not in the way we now need:
>
> > count(up{job="calculator"} == 0) and count(hour(vector(time())) >= 1 and
> hour(vector(time())) < 13)
>
> Now our problem is that we need the instance label from the up metric to
> persist to the alert so we can include it in the pager duty incident,
> otherwise our engineers don't know what instance is down without checking
> prometheus first. This is where I'm having problems, using count strips all
> those labels and just basically gives a true or false of if the alert is
> firing.
>
> Any suggestions?
>
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