Install Docker

I often face problems while installing and running docker on my Fedora machine. So I decided to note the process of installing and running docker for Fedora.

Step 1: Uninstall older version of docker.

$ sudo dnf remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine

Step 2: Install the latest version of Docker Engine and Containerd.

$ sudo dnf install docker-ce docker-ce-cli containerd.io

Step 3: Cgroups Exception: For Fedora 31 and higher, you need to enable the backward compatibility for Cgroups.

$ sudo grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0"

Step 4: Start Docker.

$ sudo systemctl start docker

Step 5: Verify that Docker Engine is installed correctly by running the hello-world image.

$ sudo docker run hello-world

If you face the below error then follow the next steps.

docker: Error response from daemon: cgroups: cgroup mountpoint does not exist: unknown.
ERRO[0000] error waiting for container: context canceled

Fix:

$ sudo mkdir /sys/fs/cgroup/systemd
$ sudo mount -t cgroup -o none,name=systemd cgroup /sys/fs/cgroup/systemd