webapp-deploy.yaml

apiVersion: v1
kind: Service
metadata:
  name: mywebapp
spec:
  selector:
    app: mywebapp
  ports:
  - protocol: "TCP"
    port: 8088
    targetPort: 8080
  type: LoadBalancer

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mywebapp
spec:
  selector:
    matchLabels:
      app: mywebapp
  replicas: 3
  template:
    metadata:
      labels:
        app: mywebapp
    spec:
      containers:
      - name: mywebapp
        image: myapp
        imagePullPolicy: Never
        ports:
        - containerPort: 8080
        env:
        - name: PG_PASSWORD
          valueFrom:
            secretKeyRef:
              name: cluster-example-app
              key: password
        - name: PG_USER
          valueFrom:
            secretKeyRef:
              name: cluster-example-app
              key: username