docker的安装

1、docker官网

Install Docker Engine on CentOS | Docker Documentation

 yum -y install gcc

 yum -y install gcc-c++

 yum install -y yum-utils

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

 yum makecache fast

 yum install docker-ce docker-ce-cli containerd.io docker-compose-plugin

 systemctl start docker

ps -ef | grep docker

出现如下说明安装成功 

docker version

---

配置镜像加速器

阿里云-为了无法计算的价值 (aliyun.com)