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HomeDatabaseMysql TutorialLinux下指定mysql数据库数据配置主主同步的实例

Linux下指定数据库数据配置主主同步的实例,有需要的朋友可以参考下

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

主主数据库同步服务器配置
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)
代码如下:
grant replication slave on *.* to 'bravedu'@'192.168.1.%' identified by 'brave123';
flush privileges;

② 更改mysql配置文件
代码如下:
[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

#相对应主从数据库同步不同的地方
代码如下:
log-slave-updates
sync_binlog=1
auto_increment_offset=1
auto_increment_increment=2
replicate-do-db = dbname
replicate-ignore-db = mysql,information_schema

重启mysql服务器

③ 查看主数据库同步状态 IP: ***.134
代码如下:
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
代码如下:
grant replication slave on *.* to 'bravedu'@'192.168.1.%' identified by 'brave123';
flush privileges;

② 更改mysql配置文件
代码如下:
[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
#相对于主从同步不同的地方
binlog-do-db = dbname
binlog-ignore-db=mysql
log-slave-updates
sync_binlog=1
auto_increment_offset=2
auto_increment_increment=2

重启mysql服务器

查看主数据库同步状态 IP: ***.138
代码如下:
mysql>flush tables with read lock;
mysql>show master status\G
*************************** 1. row ***************************
File: mysql-bin.000005 (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;

③ 指定主主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 服务器互相统一
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
代码如下:
mysql > stop slave;
#设置192.168.1.138数据库服务器配置 那么host 配置文件信息 就是 134的信息
mysql > change master to master_host='192.168.1.134', master_user='bravedu', master_password='brave123', master_log_file='mysql-bin.000005', master_log_pos=106;
#设置192.168.1.134 数据库服务器配置 那么host 等配置文件信息 就是 134的信息
mysql > change master to master_host='192.168.1.138', 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
代码如下:
mysql>show slave status\G;
Slave_IO_Running: Yes
Slave_SQL_Running: Yes

至此,主主数据库同步成功配置完成。

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