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
