CentOS下Mysql实现数据库主从同步

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CentOS下Mysql实现数据库主从同步

一、环境

  A服务器: 192.168.10.42    主服务器master  CentOS 5  Mysql 5.1.34
  B服务器: 192.168.10.68    副服务器slave   CentOS 5  Mysql 5.0.56
二、设置Master服务器

  1、编辑Master上的/etc/my.cnf文件

    在
    # Replication Master Server (default)
    # binary logging is required for replication
    添加如下内容:
    log-bin=/var/log/mysql/updatelog
    server-id = 1
    binlog-do-db=test
    binlog-ignore-db=mysql

  2、在Master服务器的Mysql上增加同步帐号

    mysql>GRANT PRIVILEGES on *.* back@192.168.10.68 IDENTIFIED BY '123456'

    mysql>FLUSH PRIVILEGES;

  3、重新启动mysql

    service mysql restart;

  4、创建需要同步的数据库sycronDb

三、设置Slave服务器  

  1、修改/etc/my.cnf文件

    server-id = 2
    master-host = 192.168.0.1
    master-user = back
    master-password = back
    master-port = 3306
    replicate-ignore-db=mysql
    replicate-do-db=sycronDb;
  2、重新启动mysql

    service mysql restart

  3、在Slave服务器上不用创建sycronDb,同步程序会自动创建数据库.

四、启动同步

  1、在Master服务器上

    mysql> show master status;
    +------------------+----------+--------------+------------------+
    | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
    +------------------+----------+--------------+------------------+
    | mysql-bin.000016 |     1033 | sycronDb     |                  |
    +------------------+----------+--------------+------------------+
    1 row in set (0.00 sec)
  2、在Slave服务器上

    mysql>slave start;

    mysql>CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000016',MASTER_LOG_POS=1033;

    mysql> show slave status/G;
    *************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.10.42
                  Master_User: back
                  Master_Port: 3306
                Connect_Retry: 10
              Master_Log_File: mysql-bin.000016
          Read_Master_Log_Pos: 1033
               Relay_Log_File: localhost-relay-bin.000021
                Relay_Log_Pos: 243
        Relay_Master_Log_File: mysql-bin.000016
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

              Replicate_Do_DB: sycronDb
          Replicate_Ignore_DB: mysql
           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: 1033
              Relay_Log_Space: 1474
              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)

  3、测试同步

    在Master服务器上执行Insert、Update、Delete、Create Table等操作测试同步,成功!

五、总结

  这次仅实现了Master-Slave的单向同步。双向同步,只要把B服务器当Master数据库反向设置一边即可.

  结合rsync实现文件同步,可以实现完整的Web站点备份

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