Docker completely transformed the process by which we create, ship, and run applications. It offers a powerful containerization solution that streamlines the deployment process and ensures consistency across different environments. If you’re a CentOS user looking to harness the capabilities of Docker, you’re in the right place. In this comprehensive guide, we’ll tell you how to install docker on centos step by step guide.
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Table of Contents
How to Install Docker on CentOS
Step 1: Update System
Start by ensuring that your system is up to date by updating the package repositories. Open your terminal and run:
sudo yum update -y
This command will fetch the latest package information from the repositories and ensure that your system is current.
Step 2: Install Required Packages
To enable CentOS to use packages over HTTPS and other prerequisites, you’ll need to install a few packages. Execute the following command:
sudo yum install -y yum-utils device-mapper-persistent-data 1vm2
These packages will provide the necessary tools and dependencies for Docker installation.
Step 3: Add Docker Repository
In order to install Docker on CentOS, it is necessary for your system to have the Docker repository added to it. CentOS offers a stable Docker repository that ensures you get the latest Docker version. Add it with the following command:
For CentOS 7:
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos
For CentOS 8:
sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
Step 4: Install Docker
With the Docker repository added, you can now proceed with the Docker installation. To install docker on CentOS run the following command:
sudo yum install -y docker-ce docker-ce-cli containerd.io
This command installs Docker Engine, Docker CLI, and Containerd, which is essential for managing containers.
Step 5: Start and Enable Docker
Now that Docker is installed, you need to start the Docker service and enable it to run on system boot. Execute the following commands:
These commands initiate the Docker service and ensure that it starts every time your system boots up.
Step 6: Verify Docker Installation
To verify that Docker is correctly installed, run a simple test by running the “hello-world” container:
sudo docker run hello-world
If everything is set up correctly, you’ll see a message indicating that your installation appears to be working.
Step 7: Add User to Docker Group (Optional)
By default, Docker commands require sudo privileges. If you want to use Docker without sudo, you can add your user to the “docker” group:
sudo usermod -aG docker $USER
However, be cautious with this option, as it can pose security risks if not managed properly. After adding your user to the group, you’ll need to log out and back in for the changes to take effect.
Check Out: Our blog post on install docker on ubuntu
Install Docker on CentOS using the convenience script
Docker offers scripts at get.docker.com and test.docker.com that make it easy to run the testing and edge versions of Docker Engine – Community in development environments without having to deal with them. The docker-install repository contains the scripts’ original source code for execution. It is strongly advised that you should not use these scripts in production environments, and before you do so, you must be aware of the potential risks involved:
- In order for the scripts to run, either root or sudo privileges are required. As a result, prior to actually executing the scripts, you ought to investigate and audit them thoroughly.
- The scripts will make an effort to determine the kind and version of Linux you are using and will then configure your package management system for you. Also, you can’t customize any of the startup settings with the scripts. This might result in a configuration that is not supported, either from Docker’s perspective or from the perspective of the norms and standards that your own business has established.
- The scripts will run and install docker on CentOS all of the package manager’s dependencies and recommendations without first requesting confirmation. Depending on how your host machine is set up right now, this could install a lot of packages.
- Installation of the most recent Docker version published in the “edge” channel is performed by the script without the ability to specify which version to install.
- If Docker has previously been installed on the host computer by another method, you should not use the convenience script.
Conclusion
Within this article, we have provided step-by-step instructions on how to install Docker on CentOS. We have covered every detail. With the given instructions, you’ve successfully installed Docker on your CentOS system. Docker is now at your fingertips, ready to simplify your application management and deployment processes. Whether you’re developing applications, managing services, or experimenting with containers, Docker is your gateway to a more efficient and consistent approach to software deployment.
Docker is a powerful tool that enables you to create and deploy your applications on any host you want. Docker containerized apps are a full bundle that includes all of the app’s prerequisites; as a result, you won’t need to be concerned about the underlying operating system or its dependencies. If you still need help installing Docker on CentOS or MySQL on CentOS, contact SupportFly, and our admins will resolve the issue ASAP.
