Centos 配置 Mysql 主从双向同步

配置之前，请先阅读mysql主从复制： Mysql-主从复制

　　原： 

　　主从环境：

　　　　主服务器：192.168.153.130

　　　　从服务器：192.168.153.131

1、从数据库创建同步用户，将主数据库作为从库

原从数据库192.168.153.131上执行
创建主从复制的帐号，将192.168.153.130作为从库：

mysql -u root -p

mysql> GRANT REPLICATION SLAVE,RELOAD,SUPER ON *.* TO backup@'192.168.153.130' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.00 sec)

2、原主数据库上执行

mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 |      358 |              |                  |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> CHANGE MASTER TO
          MASTER_HOST='192.168.153.131',
          MASTER_USER='backup',
          MASTER_PASSWORD='123456',
          MASTER_PORT=3306,
          MASTER_LOG_FILE='mysql-bin.000001',
          MASTER_LOG_POS=358,
          MASTER_CONNECT_RETRY=10;
Query OK, 0 rows affected (0.05 sec)

mysql> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.153.131
Master_User: backup
Master_Port: 3306
Connect_Retry: 10
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 275
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 420
Relay_Master_Log_File: mysql-bin.000001
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: 275
Relay_Log_Space: 576
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、测试主从双向数据同步
分别在主库和从库插入一条数据，会发现，都可以同步到另一部数据库。至此，MySQL主从双向同步完毕。

如果想配置读写分离，点击跳转：Mysql读写分离