华为云centos8 yum install 报错

报错信息:Status code: 404 for https://repo.huaweicloud.com/centos/8/AppStream/x86_64/os/repodata/repomd.xml (IP: 180.153.168.52)
Error: Failed to download metadata for repo 'AppStream': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

操作
cd /etc/yum.repos.d

tar -zcf bak20220408.tar.gz ./*.repo

rm -rf ./*.repo

wget -O /etc/yum.repos.d/CentOS-Base.repo https://repo.huaweicloud.com/repository/conf/CentOS-8-reg.repo

把 CentOS-Base.repo 里 的baseurl所有 $releasever 替换成 8-stream，(vim执行:%s/$releasever/8-stream/g)

yum clean all && yum makecache