Procedure

To relocate the Docker root directory, complete the following steps as root or a user with “sudo all” authority:

Stop the Docker services:

sudo -i

systemctl stop docker
systemctl stop docker.socket
systemctl stop containerd

Create the necessary directory structure into which to move Docker root by running the following command. This directory structure must reside on a file system with at least 50 GB free disk space. Significantly more disk space might be required depending on your daily ingestion volumes and data retention policy.

mkdir -p /data

Move Docker root to the new directory structure:

sudo mv /var/lib/docker /data

Edit the file /etc/docker/daemon.json. If the file does not exist, create the file by running the following command:

sudo vim /etc/docker/daemon.json

Add the following information to this file:

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

After the /etc/docker/daemon.json file is saved and closed, restart the Docker services:

sudo systemctl start docker

After you run the command, all Docker services through dependency management will restart. Validate the new Docker root location:

docker info -f '{{ .DockerRootDir}}'

Setup

sudo apt install docker.io

To create the docker group and add your user:

Add your user to the docker group.

sudo usermod -aG docker ${USER}

You would need to loog out and log back in so that your group membership is re-evaluated or type the following command:

su -s ${USER}

Verify that you can run docker commands without sudo.