前言
学习搭建mysql主从模式，在此记录。
配置
Red Hat 4.8.5-36 4核 8g *3；
mysqld 8.0.20
安装mysql
参考：https://blog.csdn.net/qq_38188762/article/details/100077051
下载镜像 wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm 安装镜像 rpm -ivh mysql80-community-release-el7-3.noarch.rpm 安装MySQL服务 yum install mysql-server
设置权限
chown mysql:mysql -R /var/lib/mysql
初始化mysql
mysqld --initializa
查看状态
systemctl status mysqld.service
查看进程
ps -ef|grep mysql
启动/设置开机自启
systemctl start mysqld
systemctl enable mysqld
systemctl daemon-reload
ps.这里报错Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.
vim /var/log/mysqld.log查看日志
绕过权限登录
mysqld --user=root --skip-grant-tables &
修改密码（报错刷新下权限）
alter user ‘root‘@‘%‘ identified with mysql_native_password by ‘123456‘;
远程访问
UPDATE user SET `Host` = ‘%‘ WHERE `User` = ‘root‘ LIMIT 1;
刷新权限
flush privileges;