How To Install Docker on CentOS 6

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Introduction
Docker is a container-based software framework for automating deployment of applications. “Containers” are encapsulated, lightweight, and portable application modules.
Pre-Flight Check
  • As of June 2014 Docker has officially released v1.0.0.
  • These instructions are intended for installing Docker.
  • I’ll be working from a Liquid Web Core Managed CentOS 6.5 server, and I’ll be logged in as root.
Add the EPEL Repository
Docker is part of Extra Packages for Enterprise Linux (EPEL), which is a community repository of non-standard packages for the RHEL distribution. First, we’ll install the EPEL repository: rpm -iUvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm Then, as a matter of best practice, we’ll update our packages: yum update -y
Installation
Now let’s install Docker by installing the docker-io package: yum -y install docker-io Once the installation completes, we’ll need to start the Docker daemon: service docker start And finally, and optionally, let’s configure Docker to start when the server boots: chkconfig docker on
Download a Docker Container
Let’s begin using Docker! Download the centos Docker image: docker pull centos
Run a Docker Container
Now, to setup a basic centos container with a bash shell, we just run one command. docker run will run a command in a new container, -i attaches stdin and stdout, -t allocates a tty, and we’re using the standard fedora container. docker run -i -t centos /bin/bash That’s it! You’re now using a bash shell inside of a centos docker container. To disconnect, or detach, from the shell without exiting use the escape sequence Ctrl-p + Ctrl-q. There are many community containers already available, which can be found through a search. In the command below I am searching for the keyword centos: docker search centos
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