Docker: Installation on Centos 7

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Setup the repo

sudo tee /etc/yum.repos.d/docker.repo <<-'EOF'
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/7/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
EOF

Install Docker

# Install 
$ sudo yum install docker-engine
# start the service 
$ sudo service docker start
# test it out
$ sudo docker run hello-world