mysql 互为主从(主主)配置

A.B两台mysql服务器
MySQL-master1：172.16.1.107 255.255.252.0 OS版本：CentOS 6.0X64位 mysql 5.1.54
MySQL-master2：172.16.0.106 255.255.252.0 OS版本：CentOS 5.5X32位 mysql 5.1.54
一、MySQL master-master配置
1、修改MySQL配置文件
两台MySQL均如要开启binlog日志功能，开启方法：在MySQL-master1  配置文件/etc/my.cnf
[MySQLd]段中加上
server-id = 1
binlog-do-db = test
binlog-ignore-db = mysql
replicate-do-db = test
replicate-ignore-db = mysql
master-host     =   172.16.1.107
master-user     =   backup
master-password =   123456
master-port     =  3306
master-connect-retry = 10
sync-binlog = 1
log-bin=mysql-bin
log-slave-updates
slave-skip-errors=all
auto_increment_increment=2
auto_increment_offset=1   //指的是服务器频繁的刷新日志这个保证了在其中一台挂掉的话日志刷新到另外一台从而保证了数据的同步。
在MySQL-master2  配置文件/etc/my.cnf
[MySQLd]段中加上
server-id = 2
binlog-do-db = test         //需要同步的数据库
binlog-ignore-db = mysql   //不需要同步的数据库名，多个数据库中间用逗号(,)隔开；
replicate-do-db = test    //需要同步的数据库
replicate-ignore-db = mysql
master-host     =   172.16.0.106
master-user     =   backup
master-password =   123456
master-port     =  3306
master-connect-retry = 10 //断点重连时间
sync-binlog = 1
log-bin=mysql-bin       //记录二进制文件
log-slave-updates      //表示 如果一个MASTER 挂掉的话，另外一个马上接管。
slave-skip-errors=all
auto_increment_increment=2
auto_increment_offset=2  //指的是服务器频繁的刷新日志这个保证了在其中一台挂掉的话日志刷新到另外一台从而保证了数据的同步。
将两个配置文件保存,分别重启mysql服务器
binlog-do-db=abc 需要同步的数据库,同步多个数据库重复设置选项 binlog-do-db=test   和 replicate-do-db=test
例如
binlog-do-db=test1
replicate-do-db=test1
binlog-do-db=test2
replicate-do-db=test2
2、在master1和master2上进行数据库操作
master1/master2: mysql>Slave stop;
master1/master2: mysql>Reset master;
master1: mysql>grant replication slave on *.* to [email protected] identified by '123456';
master2: mysql>grant replication slave on *.* to [email protected] identified by '123456';
master1/master2:mysql> show master status;
master1:记录file与Position的值
mysql> show master status
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 |      106 | test         | mysql            |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
master1:
mysql>change master to master_host='172.16.0.106',
mysql>master_user='backup',
mysql>master_password='123456',
mysql>master_port=3306,
mysql>master_log_file='mysql-bin.000002', //填写master2的值
mysql>master_log_pos=106;                 //填写master2的值
Query OK, 0 rows affected (0.17 sec)
mysql>slave start;
Query OK, 0 rows affected (0.00 sec)
master1:查看同步状态
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.16.0.106
                  Master_User: backup
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 106
               Relay_Log_File: localhost-relay-bin.000002
                Relay_Log_Pos: 251
        Relay_Master_Log_File: mysql-bin.000002
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: test
          Replicate_Ignore_DB: mysql
master2:mysql> slave stop;
Query OK, 0 rows affected (0.01 sec)
master2:mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 |      106 | test         | mysql            |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
master2:mysql> change master to master_host='172.16.1.107',
    -> master_user='backup',
    -> master_password='123456',
    -> master_port=3306,
    -> master_log_file='mysql-bin.000002',  //填写master1的值
    -> master_log_pos=106;                  //填写master1的值
Query OK, 0 rows affected (0.10 sec)
mysql> slave start;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.16.1.107
                  Master_User: backup
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 106
               Relay_Log_File: localhost-relay-bin.000002
                Relay_Log_Pos: 251
        Relay_Master_Log_File: mysql-bin.000002
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: test
          Replicate_Ignore_DB: mysql
看到如下状态就表示同步成功
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
3、测试数据库同步，在A的test库里增加表，在B的test库里删除表Use test；
master1:Create table abc (id int(10));
查看B中是否有abc这个表
master2: drop table abc
查看master1中是否已经删除abc这个表做到这里就完成了。