apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: cluster-pod-alerts
  labels:
    app: kube-prometheus-stack
    app.kubernetes.io/instance: {{ .Release.Name }}
spec:
  groups:
  - name: pod.alerts
    rules:
    - alert: PodOOMKilled
      expr: kube_pod_container_status_terminated_reason{reason="OOMKilled"} > 0
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: "Pod OOMKilled"
        description: "Container {{ "{{" }} $labels.container {{ "}}" }} in pod {{ "{{" }} $labels.pod {{ "}}" }} (namespace {{ "{{" }} $labels.namespace {{ "}}" }}) was OOMKilled."

    - alert: PodCrashLoopBackOff
      expr: kube_pod_container_status_waiting_reason{reason="CrashLoopBackOff"} > 0
      for: 2m
      labels:
        severity: critical
      annotations:
        summary: "Pod in CrashLoopBackOff"
        description: "Pod {{ "{{" }} $labels.pod {{ "}}" }} in namespace {{ "{{" }} $labels.namespace {{ "}}" }} is in CrashLoopBackOff."