报错：

[root@MyDevelopECS ~]# yum install -y mysql-community-server
Repository epel is listed more than once in the configuration
Last metadata expiration check: 0:05:17 ago on Tue 24 Aug 2021 11:17:14 AM CST.
All matches were filtered out by modular filtering for argument: mysql-community-server
Error: Unable to find a match: mysql-community-server
 

解决方法：
先执行：yum module disable mysql
再执行：yum -y install mysql-community-server