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How to install Docker on Rocky Linux 8

Jul 05, 2021 · 2 mins read · Post a comment
How to install Docker on Rocky Linux 8

In the early December last year, RedHat took us all by suprise with the CentOS 8 End Of Life (EOL) announcement, that was scheduled for the end of 2021. In response to this, the original CentOS founder has created a fresh project which is called Rocky Linux. The project quickly gained it’s popularity among many clients of the cloud computing giants AWS, Azure and Google Cloud. This is a great opportunity for the distro to proof docker capabilities. In the following steps, we will see how we can quickly install and setup Docker CE.

Prerequisites

  • Rocky Linux 8

Add Docker repository

Step 1. Update system OS packages.

dnf update -y

Step 2. Add Docker repository.

dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo

Example output:

Adding repo from: https://download.docker.com/linux/centos/docker-ce.repo

Step 3. We can confirm it by listing current enabled repositories.

dnf repolist

Example output:

repo id                 repo name
appstream               Rocky Linux 8 - AppStream
baseos                  Rocky Linux 8 - BaseOS
docker-ce-stable        Docker CE Stable - x86_64
extras                  Rocky Linux 8 - Extras

Install Docker

Step 4. Install Docker.

dnf install -y docker-ce docker-ce-cli containerd.io

Step 5. Enable Docker to start on boot.

systemctl enable --now docker

Example output:

Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service.

Step 6. Start Docker service.

systemctl start docker

Verify and test Docker installation

Step 7. To verify docker service running, run the following command:

systemctl status docker

Step 8. As a best practice, we should always run docker as a non root user (user without sudo privileges).

usermod -aG docker $USER

Step 9. Confirm that you are part of the docker group.

groups

Example output:

devcoops docker

Step 10. Make sure you can run docker commands.

docker --version

Example output:

Docker version 20.10.7, build f0df350

Step 11. Let’s test things out by spinning up a hello-world container.

docker run --rm --name test-me hello-world

Conclusion

Installing Docker on Rocky Linux 8 should be an easy procedure and it’s kinda the same as installing on any other Linux distribution. In some of the future posts, we will cover on how you can install docker-compose as well.
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