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Performing Rolling Updates in Kubernetes Deployments

CKAD

Overview

Learn how to perform rolling updates in Kubernetes Deployments, allowing for zero-downtime updates. This guide outlines the steps for updating a Deployment while ensuring continuous service availability.

Note

Before proceeding, ensure you have a basic understanding of Kubernetes Deployments and Services. Visit Kubernetes Documentation for more information.


Steps for a Rolling Update

Rolling updates replace old Pods with new ones, seamlessly updating your application without downtime.

1. Initiate the Rolling Update

Start by updating the Deployment's pod template, typically by changing the image version.

Example:

kubectl set image deployment/my-deployment nginx=nginx:1.16.1

2. Monitor the Rollout

Check the status of the update to ensure it's progressing correctly.

kubectl rollout status deployment/my-deployment

3. Undo the Update if Needed

If problems arise during the update, you can revert to the previous state.

kubectl rollout undo deployment/my-deployment

Tip

Always test updates in a staging environment and monitor the deployment closely during the rollout. Be prepared to rollback if any issues are detected. Performing Rolling Updates in Kubernetes Deployments

Conclusion

Rolling updates in Kubernetes provide a robust mechanism for updating applications without service interruption. By following these steps, you can maintain high availability while deploying new versions or configurations.


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