移除 老的 mysql repo

yum remove $(rpm -qa | grep mysql-community-)

安装官方新 repo:

https://dev.mysql.com/downloads/repo/yum/

yum install -y https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm

安装 mysql

yum install -y mysql-community-client  mysql-community-server mysql-community-devel

systemctl start mysqld
systemctl enable mysqld

初始化配置 mysql

查看初始密码:

cat /var/log/mysqld.log | grep password

初始化配置

mysql_secure_installation

禁用远程登录, 防火墙屏蔽3306.

Navicat 使用ssh登录机器, 然后再连接本地mysql.