Installing the Docker application deployment environment

Docker is an open source application deployment framework. It enables you to deploy applications in their own self-contained environments, providing portability and ease of distribution.

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Important

• You can only install Docker on a managed Dedicated server with root access.
• Although we have tested and run this Docker configuration, it is not supported. You can use this configuration as a starting point for your own Docker projects, but we cannot help you install, configure, maintain, or troubleshoot any custom configurations.

Installing Docker

The following procedure describes how to install Docker on AlmaLinux.

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Note

To view the most up-to-date installation documentation for Docker, please visit http://docs.docker.io.

AlmaLinux

The following procedure describes how to install Docker on a managed Dedicated Server with root access running AlmaLinux.

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Important

If you have not already installed the AlmaLinux operating system template, you must do this before following the procedure below.

To install Docker on AlmaLinux, follow these steps:

1. Log in to the server using SSH.

2. As the root user, type the following commands to update the system:

   Bash

   yum -y update
   reboot
   

3. After the system restarts, log back in to the server using SSH.

4. To add the EPEL (Extra Packages for Enterprise Linux) repository, type the following command:

   Bash

   yum -y install epel-release
   

5. To verify that the EPEL repository has been added, type the following command:

   Bash

   yum repolist
   

   You should see in the repository list output a line that resembles the following:

   epel         Extra Packages for Enterprise Linux 6 - x86_64
   

6. To install Docker, type the following command:

   Bash

   yum -y install docker-io
   

7. To start the Docker service, type the following command:

   Bash

   service docker start
   

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   Note

   If you want the Docker service to start automatically every time the system starts, type the following command:

   Bash

   chkconfig docker on
   

8. To verify that Docker installed correctly, type the following command:

   Bash

   docker run fedora /bin/echo hello world
   

   Because this is the first time you are running the Fedora container image, Docker downloads it first, and then runs the command. You should see the following output:

   hello world
   

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   Tip

   You can also run an interactive shell within the container. To do this, type the following command:

   Bash

   docker run -i -t fedora /bin/bash
   

   Note that the command prompt changes to show that you are running an interactive shell in the container. To exit the interactive shell and return to the normal prompt, type exit.

More Information

For more information about Docker, please visit http://docker.io.