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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.

Answers

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>