ping-server-deploy.yaml

# borrowed and modified from https://github.com/shelleg/kubernetes-101
apiVersion: apps/v1 
kind: Deployment
metadata:
  labels:
    app: ping-server
  name: ping-server
spec:
  replicas: 2
  selector:
    matchLabels:
      app: ping-server
  template:
    metadata:
      labels:
        app: ping-server
    spec:
      containers:
      - image: shelleg/demo-nodejs-http-server
        imagePullPolicy: Always
        name: ping-server
        ports:
        - containerPort: 8080
          protocol: TCP

ping-server-headless-svc.yaml

apiVersion: v1
kind: Service
metadata:
  labels:
    app: ping-server
  name: ping-server
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 8080
  selector:
    run: ping-server
  clusterIP: None