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1安装 Docker-CE社区版本

[root@Docker ]# yum -y install docker-ce  

启动 Docker

[root@Docker  ]# systemctl start docker

[root@Docker  ]# systemctl enable docker

2 指定docker 镜像加速器 （很重要，不然后期从国外下载docker镜像会直接报错，而且速度慢）

国内docker仓库加速站点

https://registry.docker-cn.com

http://hub-mirror.c.163.com

https://3laho3y3.mirror.aliyuncs.com

http://f1361db2.m.daocloud.io

https://mirror.ccs.tencentyun.com

https://docker.mirrors.ustc.edu.cn 

http://dockerhub.azk8s.cn/

配置加速节点

[root@Docker ]# vim /etc/docker/daemon.json

{

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

}

3 重启相关服务

[root@Docker ]# systemctl daemon-reload

[root@Docker ]# systemctl restart docker && systemctl status docker

4 测试拉取 Docker 镜像

[root@Docker ]# docker image pull centos:latest

latest: Pulling from library/centos

8a29a15cefae: Pull complete

Digest: sha256:fe8d824220415eed5477b63addf40fb06c3b049404242b31982106ac204f6700

Status: Downloaded newer image for centos:latest

docker.io/library/centos:latest

#拉取 Docker 镜像成功

[root@Docker ]# docker images

REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE

centos              latest              470671670cac        2 months ago        237MB