一、安装yum源

1、将/etc/yum.repos.d目录下的原文件备份

cd /etc/yun.repos.d

mkdir backup

mv *repo backup/

2、下载并配置 CentOS-Base.repo

wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

3、下载yum及依赖包

wget http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-3.4.3-168.el7.centos.noarch.rpm

wget http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

wget http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm

wget http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm

wget http://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-cron-3.4.3-168.el7.centos.noarch.rpm

4、安装yum及依赖

rpm -ivh --force --nodeps yum-3.4.3-168.el7.centos.noarch.rpm yum-metadata-parser-1.1.4-10.el7.x86_64.rpm yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm python-iniparse-0.4-9.el7.noarch.rpm

查看安装版本

yum --version

 5、清理yum缓存,重新生成yum缓存

yum clean all

yum makecache

结束

二、安装docker

1、安装工具

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

结束

2、添加软件源信息

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

3、更新yum索引列表

yum makecache fast

4、安装docker，遇到判断一律y

yum install docker-ce

结束

5、开启docker服务

service docker start

查看docker

docker version

6、配置下载docker镜像的仓库

mkdir -p /etc/docker

tee /etc/docker/daemon.json <<-'EOF'
> {
>     "registry-mirrors":[
>         "https://do.nark.eu.org",
>         "https://dc.j8.work",
>         "https://docker.m.daocloud.io",
>         "https://dockerproxy.com",
>         "https://docker.mirrors.ustc.edu.cn",
>         "https://docker.nju.edu.cn"
>       ]
> }
> EOF
systemctl daemon-reload

systemctl restart docker