In the previous section, we learnt how seamlessly the Docker engine enables data sharing between the Docker host and the container. Even though it is a very effective solution, it tightly couples the container to the host filesystem. These directories might leave a nasty footprint because the user has to manually remove them once their purpose is met. So, the Docker's prescription to solve this issue is to create data-only containers as a base container, and then mount the Data Volume of that container to other containers using the
--volume-from option of the
docker run subcommand.
The prime responsibility of a data-only container is to preserve the data. Creating a data-only container is very ...