Welcome to our step-by-step guide on installing Docker on AlmaLinux 9. Docker is a versatile container engine that allows you to create, deploy, and run applications in isolated environments. By utilizing the Linux Kernel, Docker provides a lightweight and efficient solution for managing your application stack. In this article, we will walk you through the installation process, enabling you to leverage the power of Docker on your AlmaLinux 9 server.

Prerequisites

Before we dive into the installation process, let’s make sure that your system is up to date. Open your terminal and run the following command to check for any pending system updates.

yum update

Adding Docker Repository

To install Docker on AlmaLinux 9, we need to enable the Docker CE repository. Run the following command to add the repository to your system.

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

Installing Docker-CE Package

Now that we have added the Docker repository, it’s time to install the Docker-CE package on AlmaLinux 9. Execute the following command to install Docker.

dnf -y install docker-ce --nobest

During the installation process, AlmaLinux 9 will resolve the package dependencies and download the necessary files. Once the installation is complete, Docker will be ready to use on your system.

Enabling the Docker Service

Before we start using Docker, we need to enable the Docker service. This will ensure that Docker starts automatically whenever your system boots up. Run the following command to enable and start the Docker service.

systemctl enable --now docker

You should see a confirmation message indicating that the Docker service has been successfully enabled. This means that Docker is now running on your AlmaLinux 9 server.

Verifying Docker Installation

To ensure that Docker is installed correctly and running, you can use the following command to check the status of the Docker service.

systemctl status docker

If Docker is running, you will see an output similar to the following:

● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
Active: active (running) since Tue 2022-05-24 21:46:00 CEST; 22s ago
Docs: https://docs.docker.com
Main PID: 9099 (dockerd)
Tasks: 7
Memory: 34.0M
CPU: 263ms
CGroup: /system.slice/docker.service
└─9099 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

Congratulations! Docker is now successfully installed on your AlmaLinux 9 server. You are ready to start using Docker to create and manage containers for your applications.

Additional Information

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Conclusion

In this article, we have covered the step-by-step process of installing Docker on AlmaLinux 9. By following these instructions, you have successfully set up Docker on your server, enabling you to deploy and manage applications in isolated containers. Docker provides a powerful solution for application deployment, allowing you to streamline your development workflow and improve scalability. Now that you have Docker up and running, you can leverage its capabilities to unlock new possibilities for your projects. Happy containerizing!

Christian Wells