MySQL建立双向主备复制服务器配置方法

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MySQL建立双向主备复制服务器配置方法

来源: 作者: 时间:2016-01-28 09:19 【

1、环境描述 服务器A(主) 192 85 1 175 服务器B(从) 192 85 1 176 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
1、环境描述

  服务器A(主) 192.85.1.175

  服务器B(从) 192.85.1.176

  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;  
在服务器A命令行执行: 

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

在A与B服务器上检查主备复制账号是否正常:

(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)
[email protected]:/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)
ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.176' (111)
[email protected]:/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

# 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

#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两台服务器上分别检查):

启动 slave 服务 ,在MYSQL命令行执行

mysql> slave start ;                
Query OK, 0 rows affected, 1 warning (0.00 sec)
查看slave 状态 ,执行命令:
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

如果需要重新启动slave 服务器,首先 执行 slave stop ,再执行 reset slave , 删除 MYSQL 数据库对应的my.cnf 文件中log_bin目录( /var/log/mysql/ )下的" mysql-bin."开头的所有文件,之后再执行slave start 命令 。

6.进行测试,主备是否正常工作,slave 启动时,两个服务器上都启动,启动后不要随意关闭再重启,例如在服务器A上启动后。

在服务器A数据中插入

INSERT INTO ddgl_qdlx ( qdlxmc, lxjc, qdlxbz) VALUES
('175a', '75a', '175a');
在服务器B中可以看到对应的记录 。

同样在服务器B中插入 :

INSERT INTO ddgl_qdlx (qdlx_id, qdlxmc, lxjc, qdlxbz) VALUES
(  '176b', '76b', '176b') ;
在服务器A中可以看到对应的记录 。

测试OK 。

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