Lab Information
An application currently running on the Kubernetes cluster employs the nginx web server. The Nautilus application development team has introduced some recent changes that need deployment. They've crafted an image nginx:1.18 with the latest updates.
Execute a rolling update for this application, integrating the nginx:1.18 image. The deployment is named nginx-deployment.
Ensure all pods are operational post-update.
Note: The kubectl utility on jump_host is set up to operate with the Kubernetes cluster
Lab Solutions
Step 1: Check Current Deployment Status
First, let's check the current state of the deployment:
Check current deployment details
kubectl get deployment nginx-deployment
Check current pods and their images
kubectl get pods
Check current image being used
kubectl get deployment nginx-deployment -o jsonpath='{.spec.template.spec.containers[0].image}' && echo
Step 2: Perform Rolling Update
Get detailed deployment information
kubectl describe deployment nginx-deployment
Update the deployment using the correct container name
kubectl set image deployment/nginx-deployment nginx-container=nginx:1.18
Watch the update progress
kubectl rollout status deployment/nginx-deployment --timeout=300s
Check current pods and their images
kubectl get pods
Confirm the image has been updated
kubectl get deployment nginx-deployment -o jsonpath='{.spec.template.spec.containers[0].image}' && echo
Check rollout history
kubectl rollout history deployment/nginx-deployment
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