apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: home-assistant
  namespace: {{ .Release.Namespace }}
  labels:
    app.kubernetes.io/name: home-assistant
    app.kubernetes.io/instance: {{ .Release.Name }}
    app.kubernetes.io/version: {{ .Chart.AppVersion }}
    app.kubernetes.io/component: metrics
    app.kubernetes.io/part-of: {{ .Release.Name }}
spec:
  groups:
    - name: home-assistant
      rules:
        - alert: HomeAssistantAbsent
          annotations:
            description: Home Assistant has disappeared from Prometheus service discovery.
            summary: Home Assistant is down.
          expr: |
            absent(up{job=~".*home-assistant.*"} == 1)
          for: 5m
          labels:
            severity: critical