注意Centos7.4系统以下需要升级内核，否则会安装失败
yum install -y yum-utils device-mapper-persistent-data lvm2 yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo yum makecache fast rpm --import https://mirrors.aliyun.com/docker-ce/linux/centos/gpg yum -y install docker-ce systemctl enable docker systemctl restart docker