Certified Kubernetes Administrator (CKA) Practice Exam: Part 2

Edit the Web Frontend Deployment to Expose the HTTP Port

In the web namespace, there is a deployment called web-frontend.

Edit this deployment so that the containers within its Pods expose port 80.

Linux

kubectl config use-context acgk8s
kubectl config set-context --current --namespace=web
kubectl edit deployment -n web web-frontend

Add the following lines then save the file

Create a Service to Expose the Web Frontend Deployment's Pods Externally

Create a service called web-frontend-svc in the web namespace. This service should make the Pods from the web-frontend deployment in the web namespace reachable from outside the cluster.

External entities should be able to reach the service by contacting any node in the cluster on port 30080.

Linux

vi web-frontend-svc.yml

web-frontend-svc.yml

apiVersion: v1
kind: Service
metadata:
   name: web-frontend-svc
   namespace: web
spec:
   type: NodePort
   selector:
      app: web-frontend
   ports:
   - protocol: TCP
     port: 80
     targetPort: 80
     nodePort: 30080

Linux

kubectl create -f web-frontend-svc.yml

Scale Up the Web Frontend Deployment

Scale the web-frontend deployment in the web namespace up to 5 replicas.

Linux

kubectl scale deployment web-frontend -n web --replicas=5
kubectl get deployment -n web

Create an Ingress That Maps to the New Service

Create an Ingress called web-frontend-ingress in the web namespace that maps to the web-frontend-svc service in the web namespace. The Ingress should map all requests on the / path.

Linux

vi web-frontend-ingress.yml

web-frontend-ingress.yml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
   name: web-frontend-ingress
   namespace: web
spec:
   rules:
   - http:
        paths:
        - path: /
          pathType: Prefix
          backend:
             service:
                name: web-frontend-svc
                port:
                   number: 80

Linux

kubectl create -f web-frontend-ingress.yml