sudo cat /etc/yum.repos.d/MariaDB.repo 

# MariaDB 12.1 CentOS repository list - created 2025-11-06 08:00 UTC
# https://mariadb.org/download/
[mariadb]
name = MariaDB
# rpm.mariadb.org is a dynamic mirror if your preferred mirror goes offline. See https://mariadb.org/mirrorbits/ for details.
# baseurl = https://rpm.mariadb.org/12.1/centos/$releasever/$basearch
baseurl = https://mirrors.aliyun.com/mariadb/yum/12.1/centos/$releasever/$basearch
module_hotfixes = 1
# gpgkey = https://rpm.mariadb.org/RPM-GPG-KEY-MariaDB
gpgkey = https://mirrors.aliyun.com/mariadb/yum/RPM-GPG-KEY-MariaDB
gpgcheck = 1