MySQL 主主复制

MySQL主主复制其实就是基于主从复制做的双向同步。

主从复制：对master做操作会同步到slave，对slave做操作不会同步到master；

主主复制：可以向两台MySQL做操作，并且都可以同步到另外一台MySQL数据库。

一.配置主从复制

请参考主从复制博文（http://guoxh.blog.51cto.com/10976315/1922643）

二.配置主主复制

1.修改MySQL配置文件

master：开启中继日志

编辑/etc/my.conf添加relay-log=relay-log-binrelay-log-index=slave-relay-bin.index重启服务[root@master~]# service mysqld restart

slave：开启二进制日志

编辑/etc/my.conf添加log-bin=master-binlog-slave-update=true重启服务[root@slave ~]# service mysqld restart

2.配置同步

上一篇文章中已在master添加授权账号，并且在slave上面配置同步操作；

这里只需要配置slave添加授权账号，在master上面配置同步操作；

slave：

mysql> grant replication slave on *.* to 'slave'@'192.168.0.%' identified by '123456';Query OK, 0 rows affected (0.00 sec)mysql> flush privileges;Query OK, 0 rows affected (0.00 sec)mysql> show master status;+-------------------+----------+--------------+------------------+| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |+-------------------+----------+--------------+------------------+| master-bin.000001 |      106|              |                  |+-------------------+----------+--------------+------------------+1 row in set (0.00 sec)

master：

mysql> change master to master_host='192.168.0.135',master_user='slave',master_password='123456',master_log_file='master-bin.000001',master_log_pos=106;Query OK, 0 rows affected (0.40 sec)mysql> start slave; #启动同步Query OK, 0 rows affected (0.00 sec)mysql> show slave status \G #查看同步状态*************************** 1. row ***************************               Slave_IO_State: Waiting for master to send event                  Master_Host: 192.168.0.135                  Master_User: slave                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: master-bin.000005          Read_Master_Log_Pos: 106               Relay_Log_File: relay-log-bin.000012                Relay_Log_Pos: 252        Relay_Master_Log_File: master-bin.000005             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: 106              Relay_Log_Space: 551              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: 0Master_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)

#Slave_IO和Slave_SQL为YES说明同步成功。

三.测试

1.在slave上面新建一个数据库

mysql> create database master;Query OK, 1 row affected (0.00 sec)mysql> show databases;+--------------------+| Database           |+--------------------+| information_schema || aaa                || master             || mysql              || test               |+--------------------+5 rows in set (0.00 sec)

2.在master上面查看

mysql> show databases;+--------------------+| Database           |+--------------------+| information_schema || aaa                || master             || mysql              || test               |+--------------------+5 rows in set (0.00 sec)

3.在master删除一个数据库

mysql> drop database aaa;Query OK, 0 rows affected (0.00 sec)mysql> show databases;+--------------------+| Database           |+--------------------+| information_schema || master             || mysql              || test               |+--------------------+4 rows in set (0.00 sec)

4.在slave上面查看

mysql> show databases;+--------------------+| Database           |+--------------------+| information_schema || master             || mysql              || test               |+--------------------+4 rows in set (0.00 sec)

#到这里，MySQL主主复制配置完毕！