This is how to install the Community Edition of Docker.
Some packages needed to install this apt-repository.
apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]') $(lsb_release -cs) stable" >> /etc/apt/sources.list.d/docker.list
Probably a better than the official one using a sources-file.
cat <<EOD | sudo tee /etc/apt/sources.list.d/docker-ce.sources >/dev/null
Types: deb
URIs: https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]')
Suites: $(lsb_release -cs)
Components: stable
Architectures: $(dpkg --print-architecture)
Signed-By:
$(wget -qO- "https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/gpg" | sed 's/^/ /')
EOD
For older distributions not supporting .sources files.
curl -fsSL "https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/gpg" | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]') stable" >>/etc/apt/sources.list.d/docker.list
sudo apt install docker-ce
Check that the package is coming from the docker repository.
apt-cache policy docker-ce
To allow a non-root user to use docker add the docker group to the user.
usermod -aG docker <login>
By default, the Docker storage location is /var/lib/docker.
To check the where the location is, execute this command.
docker info -f '{{.DockerRootDir}}'
Change it by following the next steps.
systemctl stop docker docker.socket containerd
mv /var/lib/docker /mnt/my-disk/docker
Modify the file /etc/docker/daemon.json by adding the next part to the possible existing configuration.
{
"data-root": "/mnt/my-disk/docker"
}
Modify the file /etc/docker/daemon.json by adding the next part to the possible existing configuration.
{
"log-driver": "journald"
}
Modify the file /etc/docker/daemon.json by adding the next part to the possible existing configuration.
{
"hosts": [
"unix:///run/docker.sock",
"tcp://127.0.0.1:2375"
]
}
Remove conflicting json-file option from service file /usr/lib/systemd/system/docker.service by
issuing command systemctl edit docker.service and insert the section and entries to be changed like this:
[Service]
ExecStart=/usr/bin/dockerd --containerd=/run/containerd/containerd.sock
The file /etc/systemd/system/docker.service.d/override.conf is created upon closing the editor.
Start or restart the services.
systemctl start docker docker.socket containerd
systemctl restart docker docker.socket containerd