一、官網下載地址
https://downloads.mysql.com/archives/community/
二、安裝8.0.21
1、選擇指定版本
2、下載指定rpm包並安裝
mysql-community-common-8.0.21-1.el8.x86_64.rpm
mysql-community-libs-8.0.21-1.el8.x86_64.rpm
mysql-community-client-8.0.21-1.el8.x86_64.rpm
mysql-community-server-8.0.21-1.el8.x86_64.rpm
yum install xxx.rpm
3、其他操作
https://www.cnblogs.com/gaobing/p/14464331.html