8_DockerVolume

Docker volumes

Need:

1. Permanent Storage
2. Inter container communication by common storage

❖ Create a volume that would be stored permanently on parent OS but controlled by Docker engine

$ docker volume create --name [volume name]
$ docker volume ls

❖ Run docker container and mount the volume by synchronizing it with a directory in the container.

$ docker run -it -v [volume name]:[Absolute path of sync folder] [image name] bash

• If path of the sync folder specified does not exists, creates on container launch.
• Docker Volumes are stored at /var/lib/Docker/volumes

❖ Make changes in the synchronized folder of the container

$ cd [sync folder]	
$ echo “Hello World” >> test.txt
$ exit	

Note: To give root permissions in Docker and Vagrant, use $ sudo -s

❖ Inspecting the default mounted volume:

$ docker inspect [Container name or container ID]

Note: Until container attached deleted, cannot delete volume

Note: Volume data is stored at /var/lib/docker/volumes/[volumename]/_data/{}

❖ Display all docker volumes.

$ docker volume ls

❖ Remove docker volume by name or ID

$ docker volume rm [volume name or volume ID]

❖ Delete all the Docker volumes

$ docker volume prune