安装 Fedora EPEL
1、yum -y install http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
yum -y install http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
检查内核版本 uname -r 最低2.6
2、yum -y install docker-io
