1. 卸载mariadb（如有）
rpm -qa | grep mariadb
rpm -e --nodeps mariadb*包名
2. 安装MYSQL
yum install -y https://repo.mysql.com/mysql80-community-release-el7.rpm
yum install mysql-community-server
systemctl start mysqld.service
3. 配置MYSQL
grep"password" /var/log/mysqld.log //查看初始密码
mysql -uroot -p密码
set globalvalidate_password.policy=0;
set globalvalidate_password.length=8;
ALTER USER'root'@'localhost' IDENTIFIED BY 'Mysql密码';
exit
mysqld --verbose--help | grep -A 1 "Default options"
vim /etc/my.cnf
default_password_lifetime=0
systemctl enable mysqld.service
systemctl restart mysqld.service
firewall-cmd--zone=public --add-port=3306/tcp --permanent
firewall-cmd--reload
