What are Docker data storage types?

There are 3 main data storage types supported by Docker: tmpfs mounts, volume mounts, and bind mounts.

1. tmpfs mounts - tmpfs mounts are stored in the host system’s memory only, and are never written to the host system’s filesystem.

2. volume mounts - Volumes are stored in a part of the host filesystem which is managed by Docker (/var/lib/docker/volumes/ on Linux). Non-Docker processes should not modify this part of the filesystem. Volumes are the best way to persist data in Docker.

3. bind mounts - Bind mounts may be stored anywhere on the host system. They may even be important system files or directories. Non-Docker processes on the Docker host or a Docker container can modify them at any time.

Docker data storage can only be mounted when you creating a new container from a Docker image.

Once a container is created, there is no way to mount additional storages.

⇒ Docker Data Storage - "tmpfs" Mounts

⇐ Managing Data Storage in Docker

⇑ Managing Data Storage in Docker

⇑⇑ Docker Container Platform - Tutorials