yum故障现象

  今天发现阿里云服务器上的yum源不能用了。

# yum install net-tools -y
CentOS-8 - AppStream                                                                                                                                                        7.9 kB/s | 2.3 kB     00:00    
Errors during downloading metadata for repository 'AppStream':
  - Status code: 404 for http://mirrors.cloud.aliyuncs.com/centos/8/AppStream/x86_64/os/repodata/repomd.xml (IP: 100.100.2.148)
Error: Failed to download metadata for repo 'AppStream': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

解决思路

解决思路就是删除之前的repo文件，下载新的repo文件。

备份

cp -r /etc/yum.repos.d/* /etc/yum.repos.d-bak

清空yum源配置文件

rm -rf /etc/yum.repos.d/*

下载新的阿里云镜像源并更新缓存

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
yum makecache