Centos7停止维护换源

CentOS 7已于2024年06月30日停止维护
更换为阿里云yum源

备份现有yum源
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

下载阿里云yum源配置文件
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

重新生成缓存
yum clean all
yum makecache

验证
yum repolist

问题：
yum makecache报错:Cannot find a valid baseurl for repo: centos-sclo-rh/x86_64

cd /etc/yum.repos.d/
mv CentOS-SCLo-scl-rh.repo CentOS-SCLo-scl-rh.repo.bak

vim CentOS-SCLo-rh.repo

[centos-sclo-rh]
name=CentOS-7 - SCLo rh
baseurl=https://mirrors.aliyun.com/centos/7/sclo/x86_64/rh/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-SCLo

再执行yum clean all ，yum makecache