mysql 架构~MGR+proxysql

Posted 2021-01-07 danhuangpai

一 简介:今天咱们来探讨下方案2的实现方式,同时也推荐方案2

二 环境部署

      1 proxysql 环境

      2 mgr        环境

三  进行配置

    1 创建用户       

        1 添加监控用户并授权
           grant all privileges on *.* to ‘proxyuser‘@‘%‘ identified by ‘proxypass‘;
        2  添加代理业务用户并授权
           GRANT INSERT,UPDATE,DELETE,SELECT,CREATE,DROP,ALTER ON * . * TO ‘proxyuser‘@‘%‘ IDENTIFIED BY ‘proxypass‘; ;
           flush privileges;

 

    2  添加DB列表        

         insert into mysql_servers (hostgroup_id, hostname, port) values(1, ‘mgr1‘, 3306);
         insert into mysql_servers (hostgroup_id, hostname, port) values(2, ‘mgr1‘, 3306);  
         insert into mysql_servers (hostgroup_id, hostname, port) values(2, ‘mgr2‘, 3306);
         insert into mysql_servers (hostgroup_id, hostname, port) values(2, ‘mgr3‘, 3306);
         hostgroup_id = 1代表write group 
         hostgroup_id = 2代表read group

    3  修改监控账号密码

      UPDATE global_variables SET variable_value=‘proxysql‘ WHERE variable_name=‘mysql-monitor_username‘;
      UPDATE global_variables SET variable_value=‘proxysql‘ WHERE variable_name=‘mysql-monitor_password‘;

 

    4  添加后端访问账号       

      INSERT INTO MySQL_users(username,password,default_hostgroup) VALUES (‘proxyuser‘,‘proxypass‘,1);

   5  变量生效

     LOAD MYSQL VARIABLES TO RUNTIME;
     SAVE MYSQL VARIABLES TO DISK;
     LOAD MYSQL SERVERS TO RUNTIME;
     SAVE MYSQL SERVERS TO DISK;
     LOAD MYSQL USERS TO RUNTIME;
     SAVE MYSQL USERS TO DISK;

 

   6 部署后端检测脚本

        1 下载gr_sw_mode_checker.sh并放置在/var/lib/proxysql下 并授予可执行权限

        2  insert into scheduler(id, active, interval_ms, filename, arg1, arg2, arg3, arg4) values(1, 1, 3000, ‘/var/lib/proxysql/gr_sw_mode_checker.sh‘, 1, 2, 1, ‘/var/lib/proxysql/checker.log‘); 

        3   LOAD SCHEDULER TO RUNTIME;
             SAVE SCHEDULER TO DISK;

 

    7  进行连接检测

  四 补充

         1 检测脚本必须要执行检测

         2 github上检测脚本分为两种 一种是单主模式的 一种是多主模式的 要注意区分场景使用

         3 proxysql的视图要预选导入到mysql.sys库中