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HomeDatabaseMysql Tutoriallinux下指定mysql数据库服务器主从同步的配置实例_MySQL

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一、 概念:
① 数据库同步  (主从同步 --- 主数据库写的同时 往从服务器写数据)
② 数据库同步  (主主同步 --- 两台数据库服务器互相写数据)

二、 举例
数据库服务器(A) 主数据库   IP:192.168.1.134
数据库服务器(B) 主数据库   IP:192.168.1.138
两台服务器同步的用户名为: bravedu    密码: brave123

一、主数据库操作设置(A):
① 创建同步用户名 允许连接的 用户IP地址  (非本机IP)

grant replication slave on *.* to 'bravedu'@'192.168.1.%' identified by 'brave123';
flush privileges;

② 更改mysql配置文件

[mysqld] 
server-id = 1 
log-bin=/www/mysql/binlog/binlog (路径要根据自己的安装设置)
binlog-do-db = dbname (要同步的数据库名)
binlog-ignore-db=mysql

重启mysql服务器

③ 查看主数据库同步状态

mysql>flush tables with read lock; 
mysql>show master status/G
*************************** 1. row ***************************
  File: mysql-bin.000001    (这里注意 设置从服务器的时候要用)
  Position: 106   (这里注意设置从服务器的时候要用)
  Binlog_Do_DB: dbname
  Binlog_Ignore_DB: mysql
  1 row in set (0.00 sec)

mysql>unlock tables;
*******主服务器到目前位置设置完毕***********

二、从数据库操作设置(B):

① 创建同步用户名

grant replication slave on *.* to 'bravedu'@'192.168.1.%' identified by 'brave123';
flush privileges;

② 更改mysql配置文件   

[mysqld] 
server-id = 2 
log-bin=/www/mysql/binlog/binlog (路径要根据自己的安装设置)
binlog-do-db = dbname (要同步的数据库名)
binlog-ignore-db= mysql,information_schema

重启mysql服务器

③  指定主从数据库服务器同步指令
注: IP为主服务器的IP,用户名,密码,log_file,log_post 都和主服务器统一
可能这块操作 需要先  解除锁表、停止数据库状态、在运行后 在启动状态

mysql > stop  slave;
mysql > change master to master_host='192.168.1.134', master_user='bravedu', master_password='brave123', master_log_file='mysql-bin.000001', master_log_pos=106;
mysql > start slave;
mysql > unlock tables;

④ 查看主数据库同步状态  会出来很多信息 但是主要看这两个状态就行了 如果都是 yes 就可以了

mysql>show slave status/G;
Slave_IO_Running: Yes
Slave_SQL_Running: Yes

至此,主从数据库同步配置完成。

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