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dockerdocker-volume

How to remove docker-volume of (removed) docker-container?

I have tests that runs lots of docker containers. each of them has a volume.

How can I know the volume name that I need to delete?

for example:

~ docker run -d registry:2 
~ docker volume inspect c80fc65a79039d70cf54b3af3ab66b378dec42d0757928ae94277b197d8d8104
[
    {
        "CreatedAt": "2020-08-14T11:33:50Z",
        "Driver": "local",
        "Labels": null,
        "Mountpoint": "/var/lib/docker/volumes/c80fc65a79039d70cf54b3af3ab66b378dec42d0757928ae94277b197d8d8104/_data",
        "Name": "c80fc65a79039d70cf54b3af3ab66b378dec42d0757928ae94277b197d8d8104",
        "Options": null,
        "Scope": "local"
    }
]

After manually stopping and removing the registry:2 container, the volume still exists.

I don't want to delete all volumes because some of them are still in use.

Solution

  • You don't need to determine the volume name by yourself. Actually, you have mutliple options here.

    You can use the --rm Flag on docker run if you want to clean up

    Reference: docs.docker.com: Clean Up (--rm)

    If you set the --rm flag, Docker also removes the anonymous volumes associated with the container when the container is removed. This is similar to running docker rm -v my-container. Only volumes that are specified without a name are removed. For example, when running:

    Use the docker system prune --volumes command to clean up all volumes not used by at least one container

    Reference: docs.docker.com: docker system prune

    Remove all unused containers, networks, images (both dangling and unreferenced), and optionally, volumes.

    Get the associate volumes

    If you really want to get the volumes of a container you can use the snippet

    docker inspect -f '{{ .Name }}{{ printf "\n" }}{{ range .Mounts }}{{ printf "\n\t" }}{{ .Type }} {{ if eq .Type "bind" }}{{ .Source }}{{ end }}{{ .Name }} => {{ .Destination }}{{ end }}{{ printf "\n" }}' <continaer-id>