Exercise

In this exercise, you will create a Pod and expose it outside the cluster using a NodePort type Service.

1. Create a whoami.yaml file defining a Pod with the following properties:

• name: whoami
• Pod label: app: whoami (this label should be specified in the Pod’s metadata)
• container name: whoami
• container image: containous/whoami

Then create the Pod specified in whoami.yaml.

2. Create a whoami-np.yaml file defining a service with the following characteristics:

• name: whoami-np
• type: NodePort
• a selector to group Pods with the label app: whoami
• forward requests to port 80 of the underlying Pods
• expose port 80 inside the cluster
• expose port 31000 on each cluster node (for external access)

Then create the Service specified in whoami-np.yaml

3. Launch a browser on port 31000 of one of the cluster machines.

Note: you can get the external IP addresses of your cluster nodes in the EXTERNAL-IP column of the output from the following command:

kubectl get nodes -o wide

4. Delete all resources created in this exercise

apiVersion: v1
kind: Pod
metadata:
  name: whoami
  labels:
    app: whoami
spec:
  containers:
  - name: whoami
    image: containous/whoami

kubectl apply -f whoami.yaml

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

kubectl apply -f whoami-np.yaml

kubectl delete po/whoami
kubectl delete svc/whoami-np