The Docker Registry implementation has completely changed from the previous version mentioned in the earlier edition of this book. Docker Registry 2.0 is the new implementation for storing and distributing Docker images. It supersedes the previous Docker Registry implementation (https://github.com/docker/docker-registry). The new implementation is available at https://github.com/docker/distribution. This is open source under the Apache license. The registry is a stateless, highly scalable server-side application that stores and lets you distribute Docker images. The Docker Registry index is deprecated in the new release. Previously, the Docker Registry used index internally to authenticate the user.
Docker Registry 2.0 is ...
