While we’re doing development work, but those UX enhancements aren’t necessaryįor Kubernetes, because it isn’t a human.Īs a result of this human-friendly abstraction layer, your Kubernetes cluster Docker is cool and useful because it hasĪ lot of UX enhancements that make it really easy for humans to interact with Tech stack, and one part of it is a thing called “containerd,” which is a You see, the thing we call “Docker” isn’t actually one thing-it’s an entire Is a popular choice for that runtime (other common options include containerdĪnd CRI-O), but Docker was not designed to be embedded inside Kubernetes, and Runtime that’s responsible for pulling and running your container images. Inside of your Kubernetes cluster, there’s a thing called a container We’re talking about two different environments here, and that’s creatingĬonfusion. So why the confusion and what is everyone freaking out about? The docker daemon configurations you currently use (e.g. Just make sure that the runtime you choose supports When Docker runtime support is removed in a future release (currently plannedįor the 1.22 release in late 2021) of Kubernetes it will no longer be supportedĪnd you will need to switch to one of the other compliant container runtimes, At v1.20, you will get a deprecation warning for Docker. If you’re rolling your own clusters, you will also need to make changes to avoid Please work with your service provider to ensure proper upgrade If you have nodeĬustomizations you may need to update them based on your environment and runtime Make sure your worker nodes are using a supported container runtime beforeĭocker support is removed in a future version of Kubernetes. If you’re using a managed Kubernetes service like GKE, EKS, or AKS (which defaults to containerd) you will need to Tool for building containers, and the images that result from running docker build can still run in your Kubernetes cluster. Shouldn’t, use Docker as a development tool anymore. This doesn’t mean the death of Docker, and it doesn’t mean you can’t, or If you’re an end-user of Kubernetes, not a whole lot will be changing for you. Docker-produced images will continue to work in yourĬluster with all runtimes, as they always have. That use the Container Runtime Interface (CRI)Ĭreated for Kubernetes. TL DR Docker as an underlying runtime is being deprecated in favor of runtimes You can also discuss the deprecation via a dedicated GitHub issue. Update: Kubernetes support for Docker via dockershim is now deprecated.įor more information, read the deprecation notice. Authors: Jorge Castro, Duffie Cooley, Kat Cosgrove, Justin Garrison, Noah Kantrowitz, Bob Killen, Rey Lejano, Dan “POP” Papandrea, Jeffrey Sica, Davanum “Dims” Srinivas

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