how to make the event of no datapoint found to triggerring alarm

[zouyee]

What did you do?
ALERT ea
IF sum(rate(container_cpu_usage_seconds_total{marathon_app_id="/nginx"}[5m])) BY (mesos_task_id, instance) / count(container_cpu_usage_seconds_total{marathon_app_id="/nginx"}) BY (mesos_task_id, instance) == nil
FOR 5m
LABELS {severity="warning"}
ANNOTATIONS {description="ea:app:cpus:sum:<0.8:5m⚠️/nginx", summary="ea:app:cpus:sum:<0.8:5m⚠️/nginx"}
What did you expect to see?
how to make the event of no datapoint found to triggerring alarm

@fabxc could you help me? thanks u for your response!

[fabxc]

In general the absent() function allows you to generate a result from something that has no result: https://prometheus.io/docs/querying/functions/#absent()

I'm not sure I understand what you want to do in this context. Do you want to alert if there are no instances for a Marathon task? In this case you should probably not try to embed this into calculations of CPU usage but have a separate alert.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.