[Stupid question] improve readme

[username1222]

Hi,

I feel like this is a stupid question; How can I create Prometheus rules from this, and make this useful for my environment?

Can you add something like to the README in an ELI5 fashion?

Viele danke.

[jabbrwcky]

Hi,

you could use an alert definition like this one to alert on OOM killed pods:

alert: ComponentOutOfMemory
expr: sum_over_time(kube_pod_container_status_terminated_reason{reason="OOMKilled"}[5m])
  > 0
for: 10s
labels:
  severity: warning
annotations:
  description: Critical Pod {{$labels.namespace}}/{{$labels.pod}} was OOMKilled.

[boosty]

For completeness: kube_pod_container_status_terminated_reason is provided by /~https://github.com/kubernetes/kube-state-metrics.

[boosty]

Please have a look at kubernetes/kube-state-metrics#535.

kube_pod_container_status_last_terminated_reason (notice the last part) seems like the better metric to use.