apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: alertmanager
  namespace: prometheus
  labels:
    release: prometheus
spec:
  endpoints:
    - port: http
      path: /metrics
      scheme: http
      interval: 60s
      relabelings:
        - targetLabel: cluster
          replacement: "mayne-cluster"
        # Drop alertmanager-headless to avoid duplicate metrics
        - sourceLabels: [__meta_kubernetes_service_name]
          regex: alertmanager-headless
          action: drop
  namespaceSelector:
    matchNames:
      - alertmanager
  selector:
    matchLabels:
      app.kubernetes.io/instance: alertmanager
      app.kubernetes.io/name: alertmanager