How to install 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.

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 A2 Hosting cannot help you install, configure, maintain, or troubleshoot any custom configurations.

Table of Contents

Installing Docker
- AlmaLinux
More Information

Installing Docker

The following procedure describes how to install Docker on AlmaLinux.

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.

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:

Log in to the server using SSH.
As the root user, type the following commands to update the system:
```
yum -y update
reboot
```
After the system restarts, log back in to the server using SSH.
To add the EPEL (Extra Packages for Enterprise Linux) repository, type the following command:
```
yum -y install epel-release
```
To verify that the EPEL repository has been added, type the following command:
```
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
```
To install Docker, type the following command:
```
yum -y install docker-io
```
To start the Docker service, type the following command:
```
service docker start
```
If you want the Docker service to start automatically every time the system starts, type the following command:
```
chkconfig docker on
```
To verify that Docker installed correctly, type the following command:
```
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
```
You can also run an interactive shell within the container. To do this, type the following command:
```
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.

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Article Details

Operating System: Linux Hosting
Product: Managed Dedicated Server with root access
Level: Advanced

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