Move Docker Data relocate to another disk

Problem

Have a server with a small boot drive and a large data drive.

Want to move all the docker containers to the large data drive.

Solution

Let’s assume you have permanently mounted the large data drive at /mnt/data.

Shut down docker

    sudo systemctl stop docker
    sudo systemctl stop docker.socket
    sudo systemctl stop containerd

Move existing docker data to the new location

    sudo mv /var/lib/docker /mnt/data/docker

Create or update /etc/docker/daemon.json to point to the new location:

    {
      "data-root": "/mnt/data/docker"
    }

Restart docker:

    sudo systemctl start docker