A registry is a service for storing and accessing Docker images. Docker Cloud and Docker Store are the best-known hosted registries, which you can use to store public and private images. You can also run your own registry using the open-source Docker Registry, which is a Go application in a Alpine Linux container.

You'll learn how to:

• run a local registry in a container and configure your Docker engine to use the registry;

• generate SSL certificates (using Docker!) and run a secure local registry with a friendly domain name;

• generate encrypted passwords (using Docker!) and run an authenticated, secure local registry over HTTPS with basic auth.

Note. The open-source registry does not have a Web UI, so there's no friendly interface like Docker Cloud or Docker Store. Instead there is a REST API you can use to query the registry. For a local registry which has a Web UI and role-based access control, Docker, Inc. has the Trusted Registry product.

You'll need Docker running on Linux and be familiar with the key Docker concepts, and with Docker volumes:

• Docker concepts
• Docker volumes

• Part 1 - Running a Registry Container
• Part 2 - Running a Secured Registry Container
• Part 3 - Using Basic Authentication with a Secured Registry