Creating Volume Mount from docker run command & sharing same Volume Mounts among multiple containers
Display existing volumes:
$ docker volume ls
Create a new volume:
$ docker volume create my-volume
Inspect the volume to find the mountpoint (volume location):
$ docker volume inspect my-volume
[
{
"CreatedAt": "2020-01-18T04:09:03Z",
"Driver": "local",
"Labels": null,
"Mountpoint": "/var/lib/docker/volumes/my-volume/_data",
"Name": "my-volume",
"Options": null,
"Scope": "local"
}
]
Run a container and mount the created volume to the root
$ docker run --rm -it --name c1 -v my-volume:/data alpine
Create a new file under /data:
$ cd data
$ echo "hello from c1" > hello.txt
$ cat hello.txt
Open other terminal window and run other container with the same volume:
$ docker run --rm -it --name c2 -v my-volume:/data alpine
Inspect the /data folder (the created file will be there):
$ cd data
$ ls
$ cat hello.txt
Exit from both containers (they will also be deleted automatically as they were created with the --rm flag). Ensure they are deleted:
$ docker ps -a
Run a new container attaching the existing volume:
$ docker run --rm -it --name c3 -v my-volume:/data alpine
Inspect the /data folder (the created file will still be there):
$ cd data
$ ls
$ cat hello.txt
Exit from the new container (it will also be deleted automatically as it was created with the --rm flag).
Delete the volume:
$ docker volume rm my-volume