Lab Information
An application deployed on the Kubernetes cluster requires an update with new features developed by the Nautilus application development team. The existing setup includes a deployment named nginx-deployment and a service named nginx-service. Below are the necessary changes to be implemented without deleting the deployment and service:
1.) Modify the service nodeport from 30008 to 32165
2.) Change the replicas count from 1 to 5
3.) Update the image from nginx:1.18 to nginx:latest
Note: The kubectl utility on jump_host is configured to operate with the Kubernetes cluster.
Lab Solutions
Step 1: Check the current state
First, let's examine the current deployment and service:
kubectl get deployment nginx-deployment
kubectl describe deployment nginx-deployment
kubectl get service nginx-service
kubectl describe service nginx-service
Step 2: Update the service NodePort
Let's modify the service to change the NodePort from 30008 to 32165:
kubectl edit service nginx-service
Then find the nodePort field and change 30008 to 32165, save and exit.
Step 3: Update the deployment replicas
Change the number of replicas from 1 to 5:
kubectl scale deployment nginx-deployment --replicas=5
Step 4: Update the container image
Update the image from nginx:1.18 to nginx:latest:
kubectl set image deployment nginx-deployment nginx-container=nginx:latest
Step 5: Verify all changes
Let's verify each change was applied successfully:
Check service update:
kubectl get service nginx-service -o yaml | grep nodePort
Expected output: Should show nodePort: 32165
Check replicas count:
kubectl get deployment nginx-deployment -o wide
Expected output: Should show READY: 5/5
Check pods and their images:
kubectl get pods
kubectl describe deployment nginx-deployment | grep -A 5 "Image"
Expected output: Should show nginx:latest
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