Non-Docker processes on the Docker host or a Docker container can modify them at any time. They may be important system files or directories. Bind mounts: Bind mounts may be stored anywhere on the host system. Volumes also support volume drivers, allowing storing the data on remote hosts or cloud providers, among other possibilities.Ģ. Besides the name, named and anonymous volumes behave in the same ways.
Anonymous volumes are not given an explicit name when they are first mounted into a container, so Docker gives them a random name guaranteed to be unique within a given Docker host. When we mount a volume, it may be named or anonymous. But we can remove unused volumes using Docker volume prune. When no running container uses a volume, the volume is still available to Docker and not removed automatically. Volumes are managed by Docker and are isolated from the core functionality of the host machine.Ī given volume can be mounted into multiple containers simultaneously. When we create a volume, it is stored within a directory on the Docker host. We can create a volume explicitly using the docker volume create command, or Docker can create a volume during container or service creation. Volumes are the best way to persist data in Docker. Non-Docker processes should not modify this part of the filesystem. Volumes:Volumes are stored in a part of the host filesystem, managed by Docker (/var/lib/docker/volumes/ on Linux). It is exposed as either a directory or an individual file in the container's filesystem.ġ. In all types of mounts, the data looks the same from within the container. This allows users to back up data and share file systems between containers easily. The volumes are stored on the host, independent of the container life cycle.