MySQL主从同步

MySQL主从复制

1、修改主库配置文件my.cnf,开启二进制日志、修改server-id及要同步的数据库名字

server-id=1 log-bin=binlog binlog-do-db=relearn binlog-ignore-db=mysql binlog-ignore-db=test binlog-ignore-db=information_schema

2、重启主库让更改生效，并赋予从库权限帐号、允许用户在主库上读取二进制日志。

[root@SRV1 ~]# service mysqld restart Stopping mysqld:   [  OK  ] Starting mysqld:   [  OK  ] mysql> GRANT replication slave ON *.* TO  'adminsrv'@'192.168.2.105' IDENTIFIED BY '678srv1'; Query OK, 0 rows affected (0.00 sec)

3、锁主库表、并查看主库信息

mysql> flush tables with read lock; Query OK, 0 rows affected (0.00 sec) mysql> show master status; +---------------+----------+--------------+----------------------+ | File         |  Position | Binlog_Do_DB | Binlog_Ignore_DB              | +--------------+---------+--------------+------------------------+ | binlog.000005 |    220| relearn |  mysql,test,information_schema +---------------+----------+--------------+----------------------+ 1 row in set (0.00 sec)

4、把主库的relearn数据库备份，传输到从库上

[root@SRV1 ~]# mysqldump �Cmaster-data -uroot -p relearn  > relearn.sql [root@SRV1 ~]# scp  relearn.sql [email protected]:/root/

5、登录从库，建立relearn数据库，并导入主库上传来的sql脚本

[root@SRV2 ~]# mysql -uroot -p mysql> CREATE DATABASE relearn; Query OK, 1 row affected (0.00 sec) [root@SRV2 ~]# mysql -uroot -p relearn < ./relearn.sql

6、解锁主库表

mysql> unlock tables; Query OK, 0 rows affected (0.00 sec)

7、修改从库配置文件my.cnf，并在从库上设置同步、查看从库的status状态

[root@SRV2 ~]# vi /etc/my.cnf

server-id=2

replicate-do-db=relearn

replicate-ignore-db=mysql

replicate-ignore-db=information_schema

replicate-ignore-db=test

mysql> slave stop;

Query OK, 0 rows affected (0.00 sec)

mysql> change master tomaster_host='192.168.2.109',master_user='adminsrv',master_password='678srv1',master_log_file='binlog.000005',master_log_pos=220;

Query OK, 0 rows affected (0.03 sec)

mysql> slave start;

Query OK, 0 rows affected (0.00 sec)

mysql> show slave status\G;

*************************** 1. row ***************************

           Slave_IO_State: Waiting for master to send event

              Master_Host: 192.168.2.109

              Master_User: adminsrv

              Master_Port: 3306

            Connect_Retry: 60

          Master_Log_File: binlog.000005

      Read_Master_Log_Pos: 220

           Relay_Log_File: mysqld-relay-bin.000006

            Relay_Log_Pos: 354

    Relay_Master_Log_File: binlog.000005

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

           Replicate_Do_DB:relearn

      Replicate_Ignore_DB: mysql,information_schema,test

       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: 220

          Relay_Log_Space: 354

          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)

8、测试：

查看主库表，并插入条记录： [root@SRV1 ~]# mysql -uroot -proot mysql> select * from relearn.student; Empty set (0.00 sec) mysql> insert into relearn.student values(6,'RELEARN','男','',''); Query OK, 1 row affected, 1 warning (0.00 sec) 查看从库：（已经更新） [root@SRV1 ~]# mysql -uroot -proot mysql> select * from relearn.student; +-----+---------+-----+---------------------+---------+ | num | name    | sex  | birthday            | address | +-----+---------+-----+---------------------+---------+ |   6 | RELEARN | 男 |  0000-00-00 00:00:00 |         | +-----+---------+-----+---------------------+---------+ 1 row in set (0.00 sec)

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