服务器A(主) 192.85.1.175

　　Mysql版本：5.1.61

系统版本：System OS：ubuntu 10.10 X86

（系统安装及数据环境搭建，省略）

2. 创建同步用户：

在服务B命令行执行 ：?

      grant replication slave on *.* to 'replication'@'%' identified by 'mysqlsync';  
      flush privileges;  
      grant FILE,SELECT, replication slave on *.* to 'replication'@'192.85.1.175' identified by 'mysqlsync';  
      flush privileges;  

????? grant replication slave on *.* to 'replication'@'%' identified by 'mysqlsync';?
????? flush privileges;?
????? grant FILE,SELECT, replication slave on *.* to 'replication'@'192.85.1.176' identified by 'mysqlsync';?
????? flush privileges;?

（1）分别在A与B服务器上的MYSQL命令行执行 “ show grants for 'replication'@'%';”

如果输出结果类似于如下，表示正常，其他均为异常

mysql> show grants for 'replication'@'%';
+--------------------------------------------------------------------------------------------------------------------------------------+
| Grants for replication@%                                                                                                             |
+--------------------------------------------------------------------------------------------------------------------------------------+
| GRANT SELECT, FILE, REPLICATION SLAVE ON *.* TO 'replication'@'%' IDENTIFIED BY PASSWORD '*47E2485DF0DBED84B9BD90AF25F48A36E7EAD57E' |
+--------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

（2）使用主备复制账号在A服务器远程登录B ，在B服务器远程登录A ，测试 ，如果可以正常登录说明，账号正常，可以使用。

如果出现如下错误信息：

ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.175' (111)
sxzichen@ubutun:/var/log/mysql$ ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.175' (111) ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.175' (111)

或

ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.176' (111)
sxzichen@ubutun:/var/log/mysql$ ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.176' (111) ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.176' (111)

?导致原因是，MYSQL数据库不允许远程访问，需要分别修改A与B服务器 中数据库配置文件my.cnf ，注释掉 “ bind-address = 127.0.0.1 ” 即为 “#bind-address = 127.0.0.1”

分别重新启动MYSQL服务器 ，测试正常

3.配置数据主切换 之服务器A ，修改其对应的数据配置文件----my.cnf ,在 [MYSQLD}添加如下行

#mysql replication  
server-id = 1 
log_bin = /var/log/mysql/mysql-bin.log  
master-host = 192.85.1.176  
master-user = replication 
master-password = mysqlsync 
master-port = 3306 
master-connect-retry = 60 
binlog-do-db = hrkip_zhhwd 
binlog-ignore-db = mysql   
binlog-ignore-db = information_schema 
binlog-ignore-db = phpmyadmin 
replicate-do-db = hrkip_zhhwd    
replicate-ignore-db = mysql,information_schema 

配置信息简单介绍：

server-id = 1 #主机标示，整数
log_bin = /var/log/mysql/mysql-bin.log #确保此文件可写
binlog-do-db =hrkip_zhhwd #需要备份数据，多个写多行
binlog-ignore-db =mysql #不需要备份的数据库，多个写多行

master-user = replication #远程登录数据库用户名称
master-password = mysqlsync #远程登录数据库用户密码
master-port = 3306 #远程数据库服务器端口号，可以使用 show variables like 'port'; 命令查看，必要与目标数据库服务器端口号一致

4.配置数据主切换 之服务器B ，修改其对应的数据配置文件----my.cnf ,在 [MYSQLD}添加如下行