Rolling Updates and Rollbacks

Imagine updating a live application. Without careful planning, users might experience downtime or errors. This is where rolling updates in Kubernetes shine!

Rolling updates allow you to update your application to a new version without interrupting service. New versions are gradually rolled out, ensuring your app stays available.

When you update a Deployment's Pod template (e.g., changing the container image), Kubernetes doesn't just shut down everything and restart. Instead, it uses a RollingUpdate strategy by default.

• It creates new Pods with the updated configuration.
• It gradually terminates old Pods once the new ones are ready.
• This process ensures a smooth transition with minimal to no downtime.