docker change Root Dir

$ systemctl stop docker

$ sud rsync -a /var/lib/docker/ /mnt/Data/docker-data

$ sudo vi /etc/docker/daemon.json

{

    "data-root": "/mnt/Data/docker-data",

    "runtimes": {

        "nvidia": {

            "path": "nvidia-container-runtime",

            "runtimeArgs": []

        }

    }

}

$ systemctl start docker

$ systemctl status docker

$ sudo docker info