How does CentOS 8 EOL switch sources ?

Background Information

Dec 31, 021 CentOS 8 EOL. According to community rules, the source address of CentOS 8 http://mirror.centos.org/centos/8/ has been removed, and the source of CentOS 8 has been removed from third-party mirror sites. Aliyun’s sources http://mirrors.cloud.aliyuncs.com and http://mirrors.aliyun.com also cannot be synced to CentOS 8’s sources.

An example of the error is shown in the figure below:

Steps

1. Backup previous repo files

1	`rename '.repo' '.repo.bak' /etc/yum.repos.d/*.repo` SHELL

2. Download the latest repo file

1
2

wget https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo -O /etc/yum.repos.d/Centos-vault-8.5.2111.repo
wget https://mirrors.aliyun.com/repo/epel-archive-8.repo -O /etc/yum.repos.d/epel-archive-8.repo
SHELL

3. Replace the link in the repo file

1
2

sed -i 's/mirrors.cloud.aliyuncs.com/url_tmp/g'  /etc/yum.repos.d/Centos-vault-8.5.2111.repo &&  sed -i 's/mirrors.aliyun.com/mirrors.cloud.aliyuncs.com/g' /etc/yum.repos.d/Centos-vault-8.5.2111.repo && sed -i 's/url_tmp/mirrors.aliyun.com/g' /etc/yum.repos.d/Centos-vault-8.5.2111.repo
sed -i 's/mirrors.aliyun.com/mirrors.cloud.aliyuncs.com/g' /etc/yum.repos.d/epel-archive-8.repo
SHELL