Registries
As we have seen, Docker helps us to reproduce the setup used to deploy an application, but it also helps us to distribute the application to be used in different environments. This task can be performed using registries.
A registry is a service that is responsible for hosting and distributing Docker images. The default registry used by Docker is Docker Hub. There are other options available on the market that can be used as Docker registries, including the following:
- Quay
- Google Container Registry
- AWS Container Registry
Docker Hub is really popular because it works in ways that you do not even notice. For instance, if you're creating a container and the image doesn't exist in your local repository, it will automatically download the image from Docker Hub. All the existing images are created by someone else and published in these registries. In the same way, we can publish our own images in order to make them available to other people within an organization by using private repositories...
