centos8或者Anolis OS报centos8报错：Errors during downloading metadata for repository 'docker-ce-stabl

具体错误信息，网上找了很多方法不管用

Docker CE Stable - x86_64                                                                                                                                                     185  B/s | 390  B     00:02
Errors during downloading metadata for repository 'docker-ce-stable':
  - Status code: 404 for https://download.docker.com/linux/centos/8-stream/x86_64/stable/repodata/repomd.xml (IP: 13.224.250.78)
错误：Failed to download metadata for repo 'docker-ce-stable': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

后来查询 https://developer.aliyun.com/mirror/centos?spm=a2c6h.13651102.0.0.133c1b11VxFWZH

是因为CentOS 8操作系统版本结束了生命周期（EOL），Linux社区已不再维护该操作系统版本。

 ,后找到解决方案如下

更换镜像为阿里云 以前镜像这样的

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo# 进入yum目录

cd /etc/yum.repos.d

# 删除目录下所有文件(注意完整复制，不要漏了那个点)
rm -rf ./*

# 安装正确的镜像源
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo

# 生成缓存
yum makecache

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