apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: oom-alerts
  namespace: prometheus
  labels:
    app: kube-prometheus-stack
    release: prometheus
spec:
  groups:
  - name: oom.rules
    rules:
    - alert: KubeContainerOOMKilled
      annotations:
        description: "Container {{ $labels.container }} in pod {{ $labels.namespace }}/{{ $labels.pod }} was OOMKilled."
        summary: "Container was OOMKilled"
      expr: |
        kube_pod_container_status_last_terminated_reason{reason="OOMKilled"} == 1
      for: 0m
      labels:
        severity: warning