DevOps: Puppet, Docker, and Kubernetes

Managing data in containers

Any uncommitted data or changes in containers get lost as soon as containers are deleted. For example, if you have configured the Docker registry in a container and pushed some images, as soon as the registry container is deleted, all of those images will get lost if you have not committed them. Even if you commit, it is not the best practice. We should try to keep containers as light as possible. The following are two primary ways to manage data with Docker:

• Data volumes: From the Docker documentation (https://docs.docker.com/userguide/dockervolumes/), a data volume is a specially-designated directory within one or more containers that bypasses the Union filesystem to provide several useful features for persistent or ...