使用工具
MySQL数据版本：5.6.36-log、
两台云服务器（Linux系统）
首先，需要在Linux系统下安装MySQL,具体步骤可以参考这里，并且确保两台主机可以相互访问，可以直接ping一下。
配置Master
- 在
Linux环境下，MySQL的配置文件在/ect/my.cnf，直接打开并编辑该文件：vim /etc/my.cnf - 在
[mysqld]下输入配置
log-bin=mysql-bin
server-id=2
binlog-ignore-db=information_schema
binlog-ignore-db=mysql
binlog-do-db=rwtest这里的server-id用于标识唯一的数据库，这里设置为2在设从库需要设置为其他值。
binlog-ignore-db：表示同步的时候ignore的数据库
binlog-do-db：指定需要同步的数据库
- 重启
MySQL：service mysqld restart - 登录
MySQL并对访问用户进行授权：Slave机器需要File权限和REPLICATION SLAVE权限，当然也可以授予全部权限。
grant file on *.* to 'root'@'%' identified by 'your password';
grant replication slave on *.* to 'root'@'%' identified by 'your password';
flush privileges;
or
grant all privileges on *.* to 'root'@'%' identified by 'your password';
flush privileges;- 完成后，可以查看下
Master的状态：show master status
mysql> show master status;
+------------------+----------+--------------+----------------------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+----------------------------------+-------------------+
| mysql-bin.000001 | 2272 | rwtest | information_schema,mysql | |
+------------------+----------+--------------+----------------------------------+-------------------+
1 row in set (0.03 sec)这里的File和Position在Slave中都要用到，Binlog_Do_DB指需要同步的数据库,Binlog_Ignore_DB指不需要同步的数据库，就是刚才配置的值。
配置Slave
- 同样在[mysqld]下对配置文件进行编写
log-bin=mysql-bin
server-id=3
binlog-ignore-db=information_schema
binlog-ignore-db=mysql
replicate-do-db=rwtest
replicate-ignore-db=mysql
log-slave-updates
slave-skip-errors=all
slave-net-timeout=60- 配置完毕后同样重启一下
MySQL，并进入设置其对应的Master
mysql> stop slave; #关闭Slave
mysql> change master to master_host='Master主机IP',master_user='刚才授权的用户',master_password='your password',master_log_file='mysql-bin.000001', master_log_pos=2272;
mysql> start slave; #开启Slavemaster_log_file和master_log_pos都是Master的状态值。必须对应。
- 登录slave的数据库，查看slave的状态：
show slave status \G
Slave_IO_State: Waiting for master to send event
Master_Host: 你的Master主机IP
Master_User: root
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 2272
Relay_Log_File: izwz9fcvpu481xh55cegx0z-relay-bin.000002
Relay_Log_Pos: 1339
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: rwtest
Replicate_Ignore_DB: mysql
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: 2272
Relay_Log_Space: 1530
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:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 2
Master_UUID: de20814f-2fb8-11e7-8f61-5254002b91a1
Master_Info_File: /var/lib/mysql/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
1 row in set (0.03 sec)如果状态中含有没有报Error，则表示配置成功了。
接下来你通过可视化工具连接两个数据库，在主库中进行增删改操作，从库中也会有相应的操作，而在从库中进行此类操作对主库无效。