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Using persistent storage

In the previous sections, we saw that containers can be created and deleted easily. But when a container is deleted, all the data associated with that container disappears too. That is why a lot of people refer to containers as a stateless architecture. But we can change this behavior and keep all the data by using persistent volumes. In order to enable persistent storage for a Docker container, we need to use the -v option, which binds the container filesystem to the host filesystem that runs that container.

In the next example, we will create a MariaDB container with persistent storage in the /mnt/data folder on the host. Then, we delete the MariaDB container and recreate it again using the same persistent storage. ...