Understanding Docker registries
A Docker Registry is a stateless, highly scalable server-side application that stores and lets you distribute Docker images. The registry is open source under the permissive Apache license. It is a storage and distribution system where all your Docker servers can connect and upload and download images as and when needed. It acts as a distribution site for your images.
A Docker Registry contains several Docker repositories. A Docker repository holds several versions of a specific image. For example, all the versions of the nginx image are stored within a single repository within Docker Hub called nginx.
By default, Docker interacts with its public Docker Registry instance, called Docker Hub, which helps you distribute your images to the broader open source community.
Not all images can be public and open source, and many proprietary activities are going on. Docker provides an option to use a private Docker Registry for such a scenario that you...
