8 mysql主从复制

一、环境描述
主数据库服务器ip：192.168.0.2
从数据库服务器ip：192.168.0.3
主从服务器上的mysql已全新安装，但并为投入生产，所以无数据产生。
二、主从复制配置
 1.主数据库服务器master配置
  （1）为从服务器slave授权
   mysql> grant replication slave on *.* to slave@192.168.0.3 identified by "123";
   （2）查看master状态
   mysql> show master status;
 +------------------+----------+--------------+------------------+
 | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
 +------------------+----------+--------------+------------------+
 | mysql-bin.000003 |      400 |              |                  |
 +------------------+----------+--------------+------------------+
 1 row in set (0.00 sec)
 记下file和position，一会配置slave会用到。（file为mysql日志的文件，position为日志的线索号，从服务器将从这么位置开始复制） 
 2.从数据库服务器slave配置
  （1）修改slave的server id，避免和其他mysql数据库的重复
   vi /etc/my.cnf
   server-id = 2
   (2)执行sql语句的同步
   mysql> change master to master_host=192.168.0.2, master_user=slave, master_password=123, master_log_file=mysql-bin.000003, master_log_pos=400;
   （3)启动slave的同步功能
   mysql> start slave;
    （4）查看slave状态
mysql> show slave status G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.0.2
                  Master_User: slave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 548
               Relay_Log_File: mysql-relay-bin.000002
                Relay_Log_Pos: 399
        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: 548
              Relay_Log_Space: 554
              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 (0.02 sec)
 
ERROR: 
No query specified
        注：Slave_IO_Running: Yes
            Slave_SQL_Running: Yes当IO和SQL这两个进程都是Yes，master和slave就可以进行主从复制了。
三、验证测试
 1.在master上创建一个测试表（root用户）
 mysql> use test
 mysql> create table tbs (id int);
 mysql> insert into tbs values(1);
 2.在slave上查看是否复制成功（root用户）
 mysql> use test
 mysql> show tables;
 
 mysql> select * from tbs;
                 +------+
                 | id   |
                 +------+
                 |    1 |
                 +------+
               1 row in set (0.00 sec)
显示复制成功！

 

 转自 http://www.2cto.com/database/201107/96109.html