centos7下docker安装

1.安装相关依赖

yum install -y yum-utils device-mapper-persistent-data lvm2

2.配置国内源

sudo yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

3.安装docker

sudo yum -y install docker-ce

4.启动&设置开机启动

  systemctl enable docker
  systemctl start docker

5.配置镜像加速/etc/docker/daemon.json

cd /etc/docker/
touch daemon.json

{
 "registry-mirrors": ["https://registry.docker-cn.com"]
}

原文：https://www.cnblogs.com/jenkins/p/12228579.html