What You Should Know about Kubernetes 1.20

What You Should Know about Kubernetes 1.20

Starting with version 1.20, Kubernetes will deprecate Docker as a container runtime in favor of the Container Runtime Interface (CRI). Learn what You Should Know about Kubernetes 1.20.

The latest release boasts 43 enhancements (up from 34 in version 1.D19), including 15 that are entirely new, 11 graduating to Stable, and 17 improvements on existing features.

This suggests that these enhancements are smaller in scope. For example, some changes were made to kube-apiserver to make it more user-friendly and perform better in HA clusters. It also reboots more efficiently after an upgrade.

Why is this Happening?

These small improvements and new features pave the way for the significant changes that lie ahead. However, one major change (although long expected) was already made to the latest release.

Kubernetes Deprecating Docker

Starting with version 1.20, Kubernetes will deprecate Docker as a container runtime in favor of the Container Runtime Interface (CRI).

But don't panic!

This doesn't mean that Docker is dead. You don't have to abandon the containerization tool. For the end-user of Kubernetes, not much will change as you can still build containers using Docker. The images produced will also continue to run in a Kubernetes cluster.

However, Kubernetes plans to remove Docker Engine support in the kubelet and dockershim in a future release, most likely late next year. But you can continue to use it by swapping a built-in dockershim to an external one.

k8s kubernetes

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