kube-prometheus/manifests/prometheus-k8s/prometheus-k8s-service-monitor-prometheus-operator.yaml

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
    k8s-app: prometheus-operator
  name: prometheus-operator
  namespace: monitoring
spec:
  endpoints:
  - port: http
  selector:
    matchLabels:
      k8s-app: prometheus-operator