# sudo dnf install docker
- Installs containerd and moby-engine
# sudo systemctl enable docker
- Enable docker at startup
# sudo systemctl start docker
- fails because of cgroup
# sudo vi /etc/defaults/grub
- append systemd.unified_cgroup_hierarchy=0 to the end of GRUB_CMDLINE_LINUX line
# sudo grub2-mkconfig -o /boot/grub2/grub.cfg
- Recreate grub.cfg. Note: The grub.cfg might be in a different place like /boot/efi/EFI/fedora
# sudo shutdown now -r
- reboot for grub changes to take effect
# sudo systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
Active: active (running) since Sat 2020-03-21 11:39:20 EDT; 8min ago
Docs: https://docs.docker.com
Main PID: 3976 (dockerd)
Tasks: 37 (limit: 19071)
Memory: 174.1M
CGroup: /system.slice/docker.service
├─3976 /usr/bin/dockerd --host=fd:// --exec-opt native.cgroupdriver=systemd --selinux-enabled --log-driver=journald --li>
└─3988 containerd --config /var/run/docker/containerd/containerd.toml --log-level info
# sudo usermod -aG docker $(whoami)
- Add user account to docker group
# sudo docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete
Digest: sha256:f9dfddf63636d84ef479d645ab5885156ae030f611a56f3a7ac7f2fdd86d7e4e
Status: Downloaded newer image for hello-world:latest
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
(amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
https://hub.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/get-started/
