Hi,
I'm trying to come up with a query to alert on time series that were on a
metric but are now missing, such as in detecting node become unresponsive
and time series in up{} become absent.
It is easy to enumerate the known label values to achieve this, like
absent(up{instance="abc"}). However, I wonder if there is a good way
without having to enumerate label values to achieve this.
Thanks,
Peter
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