一、centos7安装docker

1.yum安装

yum -y install docker

2.启动

systemctl  start docker.service

3.查看运行状态

ps -ef|grep docker
// 或
netstat -lnpe|grep docker

4.开机启动

systemctl enable docker

5.切换国内源

# vi /etc/docker/daemon.json
{
"registry-mirrors": ["http://hub-mirror.c.163.com"]
}
systemctl restart docker.service