sudo yum install -y yum-utils
sudo yum-config-manager --add-repo https://docs.docker.com/engine/installation/linux/repo_files/centos/docker.repo
sudo yum makecache fast
sudo yum -y install docker-engine
sudo service docker start
sudo chkconfig docker on
cut -d: -f1 /etc/group|grep docker
sudo usermod -a -G docker [user]
sudo reboot -f
Then try pulling an image like
docker pull jenkins
