Solution

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The Service specifications are as follows:

apiVersion: v1
kind: Service
metadata:
  labels:
    app: vote-ui
  name: vote-ui
spec:
  type: NodePort
  ports:
    - port: 80
      targetPort: 80
      nodePort: 31000
  selector:
    app: vote-ui

apiVersion: v1
kind: Service
metadata:
  labels:
    app: vote
  name: vote
spec:
  ports:
    - port: 5000
      targetPort: 5000
  selector:
    app: vote

apiVersion: v1
kind: Service
metadata:
  labels:
    app: redis
  name: redis
spec:
  type: ClusterIP
  ports:
    - port: 6379
      targetPort: 6379
  selector:
    app: redis

apiVersion: v1
kind: Service
metadata:
  labels:
    app: db
  name: db
spec:
  type: ClusterIP
  ports:
    - port: 5432
      targetPort: 5432
  selector:
    app: db

apiVersion: v1
kind: Service
metadata:
  labels:
    app: result
  name: result
spec:
  ports:
    - port: 5000
      targetPort: 5000
  selector:
    app: result

apiVersion: v1
kind: Service
metadata:
  labels:
    app: result-ui
  name: result-ui
spec:
  type: NodePort
  ports:
    - port: 80
      targetPort: 80
      nodePort: 31001
  selector:
    app: result-ui

Deploy the application with the following command from the votingapp directory:

kubectl apply -f .

The different Pods are now in Running status:

$ kubectl get po,svc
NAME            READY   STATUS    RESTARTS   AGE
pod/db          1/1     Running   0          20s
pod/redis       1/1     Running   0          20s
pod/result      1/1     Running   0          20s
pod/result-ui   1/1     Running   0          20s
pod/vote        1/1     Running   0          20s
pod/vote-ui     1/1     Running   0          21s
pod/worker      1/1     Running   0          20s

NAME                 TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
service/db           ClusterIP   10.100.10.36     <none>        5432/TCP       20s
service/kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP        29m
service/redis        ClusterIP   10.107.167.249   <none>        6379/TCP       20s
service/result       ClusterIP   10.105.157.142   <none>        5000/TCP       20s
service/result-ui    NodePort    10.101.30.191    <none>        80:31001/TCP   20s
service/vote         ClusterIP   10.96.108.192    <none>        5000/TCP       20s
service/vote-ui      NodePort    10.104.203.9     <none>        80:31000/TCP   20s

Using the IP address of one of the cluster nodes, we can access the vote and result interfaces via ports 31000 and 31001 respectively.

Delete the application with the following command:

kubectl delete -f .