Almalinux

Installing Docker on AlmaLinux 9

Introduction to Docker on AlmaLinux 9

For software developers looking to create a consistent computing environment for their applications, Docker emerges as a leading tool. This powerful platform allows the packaging of applications into containers, ensuring that they work seamlessly in any environment. This article is a step-by-step guide to installing Docker on AlmaLinux 9, a free, open-source, community-driven Linux distribution, designed for stability and continuity.

 

Installing Docker on AlmaLinux 9 image

Prerequisites

Before proceeding with the installation, ensure that you have:

  • A running instance of AlmaLinux 9.
  • Sudo or root privileges on the system.
  • An active internet connection.

Installing Docker on AlmaLinux 9

Follow these steps to install Docker on your AlmaLinux system:

Step 1: Update Your System

Start by updating your system’s package index to make sure all existing packages are up to date:

sudo dnf update -y

Step 2: Add the Docker Repository

AlmaLinux 9 does not come with Docker in the default repository. Therefore, you will need to add the Docker repository to your system:

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

Step 3: Install Docker Engine

With the Docker repo added, you can now install the Docker engine using the following command:

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

Step 4: Start and Enable Docker

Once the installation is complete, start the Docker service and enable it to launch at boot:

sudo systemctl start docker
sudo systemctl enable docker

Step 5: Verify Installation

To verify that Docker has been installed correctly, run the hello-world image:

sudo docker run hello-world

If you see a message indicating that your Docker installation is working, congratulations! You have successfully installed Docker on AlmaLinux 9.

Post-installation Steps

After installing Docker, consider performing the following post-installation steps for better security and usability:

  • Manage Docker as a non-root user: To avoid using sudo when you use the Docker command, add your user to the “docker” group with the command:
sudo usermod -aG docker <username></username>
  • Configure Docker to start on boot: You’ve already enabled Docker to start on boot, but to ensure it’s configured correctly, use:
sudo systemctl enable docker

For more advanced Docker configurations and usage, refer to the official Docker documentation or consider enlisting the expertise of a professional. To streamline your development operations, you might want to hire remote DevOps engineers.