deploy.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: kubernetes-tutorial-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: kubernetes-tutorial-deployment
  template:
    metadata:
      labels:
        app: kubernetes-tutorial-deployment
    spec:
      containers:
      - name: kubernetes-tutorial-application
        image: devarajc/tomcat_helloworld
        resources:
          requests:
             cpu: 500m
        ports:
          - containerPort: 8080

deploy1.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: java-servlet-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: java-servlet-deployment
  template:
    metadata:
      labels:
        app: java-servlet-deployment
    spec:
      containers:
      - name: java-servlet-application
        image: devarajc/tomcat_helloworld:version1
        ports:
          - containerPort: 8080

ingress.yaml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: java-servlet-ingress
spec:
  rules:
  - http:
      paths:
      - path: /java
        backend:
          serviceName: java-servlet-cluster-ip
          servicePort: 3001

service.yaml

apiVersion: v1
kind: Service
metadata:
  name: java-servlet-cluster-ip
spec:
  ports:
  - port: 3001
    protocol: TCP
    targetPort: 8080
  selector:
    app: java-servlet-deployment
  type: ClusterIP