In the preceding example, when we invoked the command to pull the container, we referenced https://www.docker.com/, which is Docker's container registry. There are two other common registries that you will see frequently when working with Kubernetes or reading documentation about Kubernetes: gcr.io, Google's container registry, and quay.io, CoreOS's container registry. Other companies offer hosted container registries on the internet, and you can run your own. Currently, Docker and Quay both offer free hosting for public images, so you will see those frequently in documentation and examples. All three registries also offer options for private image repositories, typically for a relatively small subscription.
One of the ...
