ServiceMonitor

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
    app: ingress-nginx
    release: prometheus
  name: ingress-nginx
  namespace: monitoring
spec:
  endpoints:
  - honorLabels: true
    interval: 10s
    path: /metrics
    port: prometheus
    scheme: http
    scrapeTimeout: 10s
  namespaceSelector:
     any: true
  selector:
    matchLabels:
      app.kubernetes.io/name: ingress-nginx
      release: prometheus