KubeCon + CloudNativeCon North America 2024

Have you ever upgraded a cluster or controller only to realize everything was broken due to some kind of versioning mismatch? Do you remember the pain of upgrading to a new Kubernetes API version like Ingress v1? Do you get a little twinge any time you see a feature or API deprecated in release notes? This is the talk for you. Kubernetes versioning is surprisingly complex and widely misunderstood. This talk will cover all the relevant versioning concepts, from storage versions to feature gates. It will show how they interact with each other, and how you can use this information to safely and confidently upgrade your clusters and controllers. This talk will provide real examples of how versioning mixups can lead to broken clusters and downtime. You’ll learn exactly how you can avoid each of these potential failure modes, and gain some insights into how API and Controller authors are trying to minimize the impact of these kinds of changes in the future.