CentOS 8.X yum源出错解决办法

由于CentOS官方已经停止维护8.X版本的yum源也是变形的宣布8.x版本的死亡，取而代之的是发布CentOS Stream版本。

下面替换成华为云的yum源是解决yum源不可用问题：

备份和创建YUM源

mkdir /repo_bak
mv /etc/yum.repos.d/* /repo_bak/

创建新的yum文件

vim /etc/yum.repos.d/CentOS-8-reg.repo

写入内容

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the 
# remarked out baseurl= line instead.
#
#
 
[BaseOS]
name=CentOS-8-stream - Base - repo.huaweicloud.com
baseurl=https://repo.huaweicloud.com/centos-vault/8.5.2111/BaseOS/$basearch/os/
#mirrorlist=https://mirrorlist.centos.org/?release=8-stream&arch=$basearch&repo=BaseOS&infra=$infra
gpgcheck=1
gpgkey=https://repo.huaweicloud.com/centos/RPM-GPG-KEY-CentOS-Official
 
#released updates 
[AppStream]
name=CentOS-8-stream - AppStream - repo.huaweicloud.com
baseurl=https://repo.huaweicloud.com/centos-vault/8.5.2111/AppStream/$basearch/os/
#mirrorlist=https://mirrorlist.centos.org/?release=8-stream&arch=$basearch&repo=AppStream&infra=$infra
gpgcheck=1
gpgkey=https://repo.huaweicloud.com/centos/RPM-GPG-KEY-CentOS-Official

[PowerTools]
name=CentOS-8-stream - PowerTools - repo.huaweicloud.com
baseurl=https://repo.huaweicloud.com/centos-vault/8.5.2111/PowerTools/$basearch/os/
#mirrorlist=https://mirrorlist.centos.org/?release=8-stream&arch=$basearch&repo=PowerTools&infra=$infra
gpgcheck=1
gpgkey=https://repo.huaweicloud.com/centos/RPM-GPG-KEY-CentOS-Official


#additional packages that may be useful
[extras]
name=CentOS-8-stream - Extras - repo.huaweicloud.com
baseurl=https://repo.huaweicloud.com/centos-vault/8.5.2111/extras/$basearch/os/
#mirrorlist=https://mirrorlist.centos.org/?release=8-stream&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=https://repo.huaweicloud.com/centos/RPM-GPG-KEY-CentOS-Official


#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-8-stream - Plus - repo.huaweicloud.com
baseurl=https://repo.huaweicloud.com/centos-vault/8.5.2111/centosplus/$basearch/os/
#mirrorlist=https://mirrorlist.centos.org/?release=8-stream&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=https://repo.huaweicloud.com/centos/RPM-GPG-KEY-CentOS-Official

其实就是将原本8.X的源替换成stream的源

执行下刷新yum源命令

yum clean all