title: Upgrade docker on CentOS 7
body: <p>I'm running centos 7 and have installed docker on host using epel packages:</p>
  
  <pre><code>yum install epel-release
  yum install docker
  </code></pre>
  
  <p>But the docker version is-<code>Docker version 0.11.1-dev, build 02d20af/0.11.1</code></p>
  
  <p>The latest stable branch of docker is 1.2</p>
  
  <p>I'm running couple of containers on this host, so how can i update docker safely on this host?</p>
  
  <p>yum update docker does not update to the latest version as the epel repo has old package.</p>