copy from:https://www.youtube.com/watch?v=pm55BUwQ0iE
# Prerequisites
- Kernel must be 3.10 at minimum
- For checking kernel version, use this command:
uname -r
# Add Docker‘s repository
- Create file docker.repo and save it in /etc/yum.repos.d/
sudo touch /etc/yum.repos.d/docker.repo
- Edit docker.repo and write this:
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
# Install Docker
sudo yum -y install docker-engine
# Starting Docker Service
sudo systemctl start docker.service
原文：http://www.cnblogs.com/vickey-wu/p/7368427.html