1、修改yum源(CentOS6.x的yum源已经失效)

请参考:​​https://blog.51cto.com/zlyang/4859648​

2、安装docker1.7
# yum -y install  https://get.docker.com/rpm/1.7.1/centos-6/RPMS/x86_64/docker-engine-1.7.1-1.el6.x86_64.rpm
3、启动服务
# service docker start