安装官方yum
rpm -ivh https://repo.mysql.com//mysql57-community-release-el7-9.noarch.rpm
调试yum
关闭旧版本
yum-config-manager --disable mysql57-community
开启新版本
yum-config-manager --enable mysql80-community
安装mysql8.0
yum install mysql-community-server -y
安装完毕，启动mysql服务
systemctl start mysqld
第一次登陆，系统生成一个零时密码
grep 'temporary password' /var/log/mysqld.log
更新密码
ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';