metrics-sample-rest/manifest/monitoring/service-monitor.yml

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
    k8s-app: sample-metrics-monitor
  name: sample-metrics-monitor
  namespace: metrics
spec:
  endpoints:
  - interval: 30s
    scheme: http
    targetPort: 8080
    path: /q/metrics
  selector:
    matchLabels:
      app: sample