> sum by (instance) (apt_upgrades_pending) > 0
I think that your suggestion will work. I'll try it out for the next days.
Many thanks.
About the other way, for completeness: Instead of using a subquery, I
wonder whether this would work too:
- record: apt_upgrades_pending:sum_grouped_by_instance
expr: sum by ( instance ) ( apt_upgrades_pending )
- alert: AptNotUpdatingPackages
expr: min_over_time( apt_upgrades_pending:sum_grouped_by_instance[7d] )
> 0
for: 0m
labels:
severity: warning
Prometheus seems unable to do a min_over_time() from a sum(). Is that kind
of intermediate step with "record" a generic way to overcome this
limitation? Or have I missed something?
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