Overview of the Extensions SDK

The resources in this section help you create your own Docker extension.

The Docker CLI tool provides a set of commands to help you build and publish your extension, packaged as a specially formatted Docker image.

At the root of the image filesystem is a metadata.json file which describes the content of the extension. It's a fundamental element of a Docker extension.

An extension can contain a UI part and backend parts that run either on the host or in the Desktop virtual machine. For further information, see Architecture.

You distribute extensions through Docker Hub. However, you can develop them locally without the need to push the extension to Docker Hub. See Extensions distribution for further details.

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