Mysql数据同步(双向)

如果想做单向同步的话,可以看我的另一篇文章:http://297020555.blog.51cto.com/1396304/525199


一.准备环境 
 Master:
  Ip:192.168.211.128
  Mysql版本:5.0.77(可以通过命令mysqladmin -uroot -p123 version查看)
 Slave:
  Ip:192.168.211.131
      Mysql版本:5.0.77
二.设置同步
 设置master同步
  1. 修改my.cnf
   vi /etc/my.cnf
   添加内容如下:
 server-id=1 (mysql标示)
 log-bin=mysql-bin(开启log-bin二进制日志文件,默认存在/var/lib/mysql下日志文    件以mysql-bin为开头)
 binlog-do-db =backup(backup为需要同步的数据库名,如需同步多个数据库,可以另起行如binlog-do-db =backup1)
 # binlog-ignore-db=db_name (不进行同步日志的数据库,不需要的话注释掉)
 max-binlog-size=104857600(日志的大小,超出会自动生成一个新的)
 master-host=192.168.211.131(同步主机)
 master-user=backup(同步用户)
 master-password=123(同步用户密码)
 master-port=3306
 replicate-do-db=backup(同步数据库)

修改完后保存退出,并重启mysql 如:service mysql restart (重启正常,表示配置没错误)
      2. 在作为master的mysql上建立一个账户专门用于slave来进行数据同步


        mysql>grant file on *.* to backup@'192.168.211.131' identified by '123';
 

        mysql>flush privileges;

 
        Mysql>create database backup;

       在slave上测试账户backup是否可以访问mster上的mysql:

       #mysql -u backup -p -h 192.168.211.128(输入密码123,可以访问说明设置正确)


   设置slave同步
     1. 修改my.cnf
     vi /etc/my.cnf
        添加内容如下:
       server-id= 2 (mysql标示,不能出现重复)
      
       log-bin=mysql-bin(开启log-bin二进制日志文件,默认存在/var/lib/mysql下日志文    件以mysql-bin为开头)

 binlog-do-db =backup(backup为需要同步的数据库名,如需同步多个数据库,可以另起行如binlog-do-db =backup1)

        max-binlog-size=104857600(日志的大小,超出会自动生成一个新的
   
        master-host=192.168.211.128 (同步Master的ip地址)

       master-user=backup (同步所需的账号)

       master-password=123 (同步账号的密码)

       master-port=3306 (mstart 中mysql的访问端口)

       replicate-do-db=backup (所需同步的数据库名)
      
       #replicate-ignore-db=mysql(不同步mysql库)
       #replicate-do-table=backup.stu (如果只需同步backup数据库中的stu表)

       #replicate-do-table=backup.teacher(如果只需同步backup数据库中的stu表)

       master-connect-retry=60 (主服务器宕机或连接丢失的情况下,从服务器线程重新尝试连接主服务器之前睡眠的秒数
       
       log-bin=mysql-bin (开启log-bin二进制日志文件)
       修改完后保存退出,并重启mysql 如:service mysql restart (重启正常,表示配置没错误)
     2. 在作为slave的mysql上建立用来同步的账户和库

        mysql>grant file on *.* to backup@'192.168.211.128' identified by '123';
 

        mysql>flush privileges;

 
        Mysql>create database backup;


 三.查看状态
  在Master上:
 mysql> show master status;
 +------------------+----------+--------------+------------------+
 | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
 +------------------+----------+--------------+------------------+
 | mysql-bin.000005 |      189 | backup       |                  |
 +------------------+----------+--------------+------------------+
 1 row in set (0.00 sec)
 mysql> show slave status\G
 *************************** 1. row ***************************
              Slave_IO_State: Waiting for master to send event
                 Master_Host: 192.168.211.131
                 Master_User: backup
                 Master_Port: 3306
               Connect_Retry: 60
             Master_Log_File: mysql-bin.000005
         Read_Master_Log_Pos: 207
              Relay_Log_File: mysqld-relay-bin.000002
               Relay_Log_Pos: 344
       Relay_Master_Log_File: mysql-bin.000005
            Slave_IO_Running: Yes
           Slave_SQL_Running: Yes
             Replicate_Do_DB: backup
         Replicate_Ignore_DB:
          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: 207
             Relay_Log_Space: 344
             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
 1 row in set (0.00 sec)
 
 在Slave上:
 mysql> show master status;
 +------------------+----------+--------------+------------------+
 | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
 +------------------+----------+--------------+------------------+
 | mysql-bin.000005 |      207 | backup       |                  |
 +------------------+----------+--------------+------------------+
 1 row in set (0.00 sec)
 mysql> show slave status\G
 *************************** 1. row ***************************
              Slave_IO_State: Waiting for master to send event
                 Master_Host: 192.168.211.128
                 Master_User: backup
                 Master_Port: 3306
               Connect_Retry: 60
             Master_Log_File: mysql-bin.000005
         Read_Master_Log_Pos: 189
              Relay_Log_File: mysqld-relay-bin.000002
               Relay_Log_Pos: 326
       Relay_Master_Log_File: mysql-bin.000005
            Slave_IO_Running: Yes
           Slave_SQL_Running: Yes
             Replicate_Do_DB: backup
         Replicate_Ignore_DB:
          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: 189
             Relay_Log_Space: 326
             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
 1 row in set (0.00 sec)


验证是否配置正确

在slave服务器上执行show slave status\G;

Waiting for master to send event

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

如以上二行同时为Yes 说明配置成功


四.测试

1、在master服务器backup数据库中创建user表

mysql>use backup;

mysql>create table user(id int);

2在slave服务器中查看user表

mysql>use backup;mysql> show tables;
+------------------+
| Tables_in_backup |
+------------------+
| user             |
+------------------+
1 row in set (0.00 sec)


3.在slave服务器backup数据库中创建pass表
mysql>use backup;mysql>create table pass(id int);


4.在master服务器中查看pass表

mysql> show tables;
+------------------+
| Tables_in_backup |
+------------------+
| pass             |
| user     
        |
+------------------+
2 rows in set (0.00 sec)
说明主从数据同步成功。