Home Database Mysql Tutorial Ubuntu Server 12.10 MySQL的主从复制笔记

Ubuntu Server 12.10 MySQL的主从复制笔记

Jun 07, 2016 pm 05:28 PM
mysql master-slave replication

Ubuntu Server 12.10 MySQL的主从复制笔记

OS:Ubuntu Server 12.10

二台服务器,A的内网IP为192.168.1.111,B的内网IP为192.168.1.222,A做为master,B做为Slave

1.  配置A的Mysql

(1)  vim /etc/mysql/my.cnf

去掉[mysqld]段中 server_id =1 和log_bin=/var/log/mysql/mysql-bin.log的#注释

加上  binlog-do-db = s3    s3就是要同步的数据库的名称,如果没有这一行,表示同步所有的数据,另外 binlog_ignore_db = mysql。要表示忽略同步的数据库名称为mysql,如果有多个要指定同步或是忽略同步的数据,就配置多行,保存退出。

(2) 创建一个复制用的账户(名称为repl,允许从远程连接,密码为123456):

GRANT REPLICATION SLAVE, RELOAD,SUPER, NO *.* TO repl@'%' IDENTIFIED BY '123456';

FLUSH PRIVILEGES;

(3) 重启mysql服务,或是直接reboot机器也可以

(4) 进入mysql,,然后用 show master status\G  查看二进制日志的状态,看到类似以下的结果:
          +------------------+----------+--------------+------------------+
          | File                      | Position  | Binlog_Do_DB | Binlog_Ignore_DB |
          +------------------+----------+--------------+------------------+
          | mysql-bin.000003 |    1376  | s3                  |                          |
          +------------------+----------+--------------+------------------+

2.  配置B的Mysql

      (1) vim /etc/mysql/my.cnf
          去掉[mysqld]段中 server_id =1 和log_bin=/var/log/mysql/mysql-bin.log的#注释,把server_id改为2,要和master机器的不一样。并增加以下内容:
          binlog_do_db=s3
          log-slave-updates
          保存退出
    (2) 重启mysql服务
    (3) 进入mysql,执行
          CHANGE MASTER TO MASTER_HOST='192.168.1.111', MASTER_USER='repl',Master_Port=3306,MASTER_PASSWORD='123456',MASTER_LOG_FILE='mysql-bin.000003',MASTER_LOG_POS=1376;
          SLAVE START;
          注意上面的CHANGE语句中,MASTER_LOG_FILE和MASTER_LOG_POS就是上面1.4中提到的show master status命令得到的结果,指定二进制文件的名称和开始同步的位置。
    (4) 查看SLAVE状态:    show slave status\G

*************************** 1. row ***************************
              Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.111
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 1376
              Relay_Log_File: mysqld-relay-bin.000002
                Relay_Log_Pos: 1355
        Relay_Master_Log_File: mysql-bin.000003
            Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB:
          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: 1376
              Relay_Log_Space: 1512
              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:
  Replicate_Ignore_Server_Ids:
            Master_Server_Id: 1

上面的红色二行如果为YES则表示已经正常连接,可以进行复制了。

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