Managing Docker Images with Ansible
Docker images are slightly different from containers. That is, the image is the stored copy of the container. Docker images are stored in what is commonly referred to as a registry. In the context of Docker, the registry acts similar to a source control solution in many ways. That source control solution is mirrored in many ways to Git. Docker registries parallel Git in many ways; the most obvious is the ability to have a distributed set of registries. Confused yet? Let's take a look at the following diagram:
From the preceding illustration, we can see that the Docker registry is a remote location that stores Docker images. Docker images then reside in a local registry (local to the developer) where they can manipulate and store changes made to the various containers stored within the Docker registry. When a set of changes has been deemed complete, the developer has the option to push the image(s) to the remote registry and communicate their changes.
