In this article, we will have explained the necessary steps to install Docker on CentOS 8. Before continuing with this tutorial, make sure you are logged in as a user with sudo privileges. All the commands in this tutorial should be run as a non-root user.
Docker is an open-source project which allows the creation and distribution of applications inside containers, which are standardized environments that can be easily replicated, independently from the host system.
Install Docker on CentOS 8
Step 1. The first command will update the package lists to ensure you get the latest version and dependencies.
sudo dnf install epel-release sudo dnf update
Step 2. Install Docker on CentOS.
Now, we add the Docker repository:
sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
Verify that the repository has been enabled by typing the following dnf command:
$ sudo dnf repolist -v .... Repo-id : docker-ce-stable Repo-name : Docker CE Stable - x86_64 Repo-revision: 1567619328 Repo-updated : Mon 11 Nov 2019 05:46:36 PM UTC Repo-pkgs : 51 Repo-size : 1.1 G Repo-baseurl : https://download.docker.com/linux/centos/7/x86_64/stable Repo-expire : 146,600 second(s) (last: Mon 04 Oct 2019 09:46:36 PM UTC) Repo-filename: /etc/yum.repos.d/docker-ce.repo
Install Docker using the following command:
sudo dnf -y install docker-ce --nobest
Now we must enable docker service:
sudo systemctl enable --now docker
You can check the Docker service status using the following systemctl command:
sudo systemctl status docker
The output should be similar to the following, showing that the service is active and running:
docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor pres>
Active: active (running) since Sun 2019-11-11 18:00:45 UTC; 1min 32s ago
Docs: https://docs.docker.com
Main PID: 2856 (dockerd)
Tasks: 24
Memory: 53.2M
CGroup: /system.slice/docker.service
├─2826 /usr/bin/dockerd -H fd://
└─2823 containerd --config /var/run/docker/containerd/containerd.tom>Finally, add your user to the docker group with the command:
sudo usermod -aG docker $USER
That’s all you need to do to install Docker on CentOS 8. I hope you find this quick tip helpful. For further reading on Docker, please refer to their official knowledge base. If you have questions or suggestions, feel free to leave a comment below.
