MySQL建立双向主备复制server配置方法
serverA(主) 192.85.1.175
serverB(从) 192.85.1.176Mysql版本号：5.1.61
系统版本号：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命令行运行 ：
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; 在serverA命令行运行：
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; 在A与Bserver上检查主备复制账号是否正常：
（1）分别在A与Bserver上的MYSQL命令行运行 “ show grants for ‘replication‘@‘%‘;”
假设输出结果类似于例如以下，表示正常，其它均为异常
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Aserver远程登录B ，在Bserver远程登录A ，測试 ，假设能够正常登录说明，账号正常，能够使用。
假设出现例如以下错误信息：
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数据库不同意远程訪问，须要分别改动A与Bserver 中数据库配置文件my.cnf ，凝视掉 “ bind-address = 127.0.0.1 ” 即为 “#bind-address = 127.0.0.1”
分别又一次启动MYSQLserver ，測试正常
3.配置数据主切换 之serverA ，改动其相应的数据配置文件----my.cnf ,在 [MYSQLD}加入例如以下行
#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
配置信息简介：
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 #须要备份数据，多个写多行
binlog-ignore-db =mysql #不须要备份的数据库，多个写多行
master-user = replication #远程登录数据库username称
master-password = mysqlsync #远程登录数据库用户密码
master-port = 3306 #远程数据库server端口号，能够使用 show variables like ‘port‘; 命令查看，必要与目标数据库server端口号一致
4.配置数据主切换 之serverB ，改动其相应的数据配置文件----my.cnf ,在 [MYSQLD}加入例如以下行
#mysql replication server-id = 2 log_bin = /var/log/mysql/mysql-bin.log master-host = 192.85.1.175 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
5.检查配置是否正常（l两台server上分别检查）：
启动 slave 服务 ，在MYSQL命令行运行
mysql> slave start ; Query OK, 0 rows affected, 1 warning (0.00 sec)
查看slave 状态 ，运行命令：
mysql> show slave status \G ;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.85.1.175
Master_User: replication
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 106
Relay_Log_File: ubutun-relay-bin.000005
Relay_Log_Pos: 251
Relay_Master_Log_File: mysql-bin.000002
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: hrkip_zhhwd
Replicate_Ignore_DB: mysql,information_schema
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 106
Relay_Log_Space: 552
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
1 row in set (0.00 sec)
ERROR:
No query specified假设须要又一次启动slave server，首先 运行 slave stop ,再运行 reset slave , 删除 MYSQL 数据库相应的my.cnf 文件里log_bin文件夹（ /var/log/mysql/ ）下的" mysql-bin."开头的全部文件，之后又一次启动MYSQL服务,之后再运行slave start 命令 。
6.进行測试，主备是否正常工作，slave 启动时，两个server上都启动，启动后不要任意关闭再重新启动，比如在serverA上启动后。
在serverA数据中插入
INSERT INTO ddgl_qdlx ( qdlxmc, lxjc, qdlxbz) VALUES
('175a', '75a', '175a');在serverB中能够看到相应的记录 。
相同在serverB中插入 ：
INSERT INTO ddgl_qdlx (qdlx_id, qdlxmc, lxjc, qdlxbz) VALUES ( '176b', '76b', '176b') ;
在serverA中能够看到相应的记录 。
測试OK 。
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