一、环境描述

       mysql服务器A    192.168.3.161        mysql服务器B    192.168.3.163     
 
二、主主配置过程
1、创建同步用户：
 服务器A：
grant replication slave,file on *.* to 'replication'@'192.168.3.163' identified by '123456';
flush privileges;
服务器B：
grant replication slave,file on *.* to 'replication'@'192.168.3.161' identified by '123456';
flush privileges;
2、修改mysql配置文件
       A：
log-bin=mysql-bin
server-id       = 1
binlog-do-db=test
binlog-ignore-db=mysql
replicate-do-db=test
replicate-ignore-db=mysql
log-slave-updates
sync_binlog=1
auto_increment_increment=2
auto_increment_offset=1
       B：
log-bin=mysql-bin
server-id       = 2
binlog-do-db=test
binlog-ignore-db=mysql
replicate-do-db=test
replicate-ignore-db=mysql
log-slave-updates
sync_binlog=1
auto_increment_increment=2
auto_increment_offset=2
 

 

参数选项说明：
log-slave-updates    将执行的复制sql记录到二进制日志
sync_binlog  当有二进制日志写入binlog文件的时候，mysql服务器将它同步到磁盘上
auto_increment_increment，auto_increment_offset 主要用于主主复制中，用来控制AUTO_INCREMENT列的操作

      
       3、重启mysql服务后，进入mysql命令行，执行操作如下：
              A:
              mysql> flush tables with read lock;
              mysql> show master status\G
*************************** 1. row ***************************
            File: mysql-bin.000010
            Position: 107
            Binlog_Do_DB: test
Binlog_Ignore_DB: mysql
1 row in set (0.00 sec)
        mysql> unlock tables;
              mysql> stop slave;
mysql> change master to master_host='192.168.3.163',master_user='replication',master_password='123456',master_log_file='mysql-bin.000010', master_log_pos=107;
              mysql> start slave;
             
              B：
              mysql> flush tables with read lock;
              mysql> show master status\G
*************************** 1. row ***************************
            File: mysql-bin.000010
            Position: 107
            Binlog_Do_DB: test
Binlog_Ignore_DB: mysql
1 row in set (0.00 sec)
        mysql> unlock tables;
              mysql> stop slave;
mysql> change master to master_host='192.168.3.161',master_user='replication',master_password='123456',master_log_file='mysql-bin.000010', master_log_pos=107;
              mysql> start slave;
 
       4、查看各服务器的状态：
              mysql> show slave status\G;
              出现：Slave_IO_Running: Yes
              Slave_SQL_Running: Yes

              则状态正常，直接测试数据能否同步就OK了！