This guide provides a step-by-step process to install Docker Community Edition (CE) on CentOS 7 or 8, including systems using CWP (Control Web Panel), cPanel, or Plesk. Docker is a powerful platform-as-a-service (PaaS) tool that uses OS-level virtualization to run software in isolated containers. Each container includes its own software, libraries, and configuration files, and communicates with others through defined channels or ports.

Step 1: Install Necessary Dependencies

Before installing Docker, ensure the required dependencies are installed on your system. Execute the following command:

yum install -y yum-utils device-mapper-persistent-data lvm2

These utilities are essential for managing the Docker repository and configuring storage options.

Step 2: Add the Docker Repository

To install Docker, you first need to add the official Docker repository to your system. Use the command below:

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

This step enables your system to fetch Docker packages directly from the official source.

Step 3: Install Docker Community Edition

Next, install Docker CE along with the required command-line interface and container runtime:

yum install docker-ce docker-ce-cli containerd.io

Once the installation completes, start the Docker service and enable it to run automatically at system boot:

systemctl start docker

systemctl enable docker

Step 4: Verify the Installation

To confirm that Docker is installed and functioning correctly, run the following command:

docker run hello-world

This command downloads and runs a test image, verifying that Docker is working properly on your system.

Conclusion

You’ve successfully installed Docker Community Edition on your CentOS-based system with or without a control panel like CWP, cPanel, or Plesk. With Docker set up, you can now start deploying and managing containers, streamlining software development and deployment processes.