Lab Information

Earlier today, the Nautilus DevOps team deployed a new release for an application. However, a customer has reported a bug related to this recent release. Consequently, the team aims to revert to the previous version.

There exists a deployment named nginx-deployment; initiate a rollback to the previous revision.

Note: The kubectl utility on jump_host is configured to interact with the Kubernetes cluster.

Lab Solutions

Step 1: Check Current Deployment Status

First, let's check the current state and revision history:

Check current deployment status

kubectl get deployment nginx-deployment

Check current pods and their images

kubectl get pods -l 

Check the rollout history

kubectl rollout history deployment nginx-deployment

Step 2: View Detailed Rollout History

Get detailed revision history with changes

kubectl rollout history deployment nginx-deployment --revision=2
kubectl rollout history deployment nginx-deployment --revision=1

Step 3: Perform the Rollback

Rollback to the previous revision

kubectl rollout undo deployment nginx-deployment

Step 4: Monitor the Rollback

Monitor the rollback progress

kubectl rollout status deployment nginx-deployment --timeout=300s

Watch the pods during rollback

kubectl get pods -l 

Step 5: Verify the Rollback

kubectl get deployment nginx-deployment -o jsonpath='{.spec.template.spec.containers[0].image}' && echo

Check rollout history to confirm rollback

kubectl rollout history deployment nginx-deployment

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