example_prometheus_rule.yaml

apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  creationTimestamp: null
  labels:
    app: kube-prometheus-stack
    release: prometheus-operator
  name: prometheus-example-rules
spec:
  groups:
  - name: ./example.rules
    rules:
    - alert: ExampleAlert
      expr: vector(1)
      labels:
        severity: warning
      annotations:
        summary: "Example Alert"
        description: "A test prometheus rule that always fires"