app1.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: app1-deployment
spec:
  selector:
    matchLabels:
      app: app1
  replicas: 1
  template:
    metadata:
      labels:
        app: app1
    spec:
      containers:
        - name: nginx
          image: nginx:1.16.1
          ports:
            - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: app1-service
spec:
  ports:
    - name: nginx
      port: 80
      protocol: TCP
      targetPort: 80
  type: ClusterIP
  selector:
    app: app1
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: app1-ingress
  labels:
    app: app1
  annotations:
    kubernetes.io/ingress.class: azure/application-gateway
spec:
  rules:
    - host: ******
      http:
        paths:
          - backend:
              serviceName: app1-service
              servicePort: 80