Centos7.x通过yum 安装MySQL指定版本（5.7.x-8.0)

1，新建MySQL的repo仓库

 vim /etc/yum.repos.d/mysql-community.repo 

[mysql-server]

name=MySQL 5.7 Community Server

baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/

enabled=1

gpgcheck=0

#8.0的数据库repo安装

[mysql-server]
name=MySQL 8.0 Community Server
baseurl=http://repo.mysql.com/yum/mysql-8.0-community/el/7/$basearch/
enabled=1
gpgcheck=0

2，yum 安装MySQL数据库，安装一整套MySQL的软件

yum -y install mysql mysql-community-server
3,启动MySQL并初始化数据库

systemctl start mysqld.service

4，修改初始密码

grep 'temporary password' /var/log/mysqld.log
mysql -uroot -p
ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyxpklPass4!';
参考链接：https://dev.mysql.com/doc/mysql-yum-repo-quick-guide/en/