MySQL5.7下配置GTID复制的方法：
环境：
CentOS6.8X86_64
MySQL Community 5.7.17
node1:192.168.2.171 主库
node2:192.168.2.172 从库
修改主库和从库的配置文件，加入红色部分的配置项：
主库：
[mysqld]
log-bin=mysql-bin
binlog_format= ROW
gtid-mode = ON
enforce_gtid_consistency = ON
master-info-repository=TABLE
relay-log-info-repository=TABLE
从库：
[mysqld]
log-bin=mysql-bin
binlog_format= ROW
log_slave_updates = ON
gtid-mode = ON
enforce_gtid_consistency = ON
master-info-repository=TABLE
relay-log-info-repository=TABLE
重启主库和从库，使上面的配置生效。
然后在node1上导出全量的数据并传到node2：
mysqldump -uroot -proot -q--single-transaction -A > /root/all.sql
scp /root/all.sql root@192.168.2.172:/root
在node2上导入: mysql -uroot -proot < /root/all.sql
然后，还要在node1的主库创建个复制权限的账号：
> GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'repluser'@'192.168.2.%' IDENTIFIED BY 'Abcd@1234';
在slave上配置change master to指向（如下6行代码）：
> change master to
master_HOST='192.168.2.171',
master_PORT=3306,
master_USER='repluser',
master_PASSWORD='Abcd@1234',
master_AUTO_POSITION=1;
> start slave;
> show slave status\G 结果如下：
***************************1. row ***************************
Slave_IO_State: Waiting formaster to send event
Master_Host: 192.168.2.171
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql.000006
Read_Master_Log_Pos: 786
Relay_Log_File:node2-relay-bin.000002
Relay_Log_Pos: 991
Relay_Master_Log_File: mysql.000006
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: 786
Relay_Log_Space: 1198
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:101
Master_UUID:e2deedc8-ed36-11e6-b826-000c29f17302
Master_Info_File:mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has readall relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:e2deedc8-ed36-11e6-b826-000c29f17302:1-3
Executed_Gtid_Set:e2deedc8-ed36-11e6-b826-000c29f17302:1-3
Auto_Position: 1
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
这样，我们的基于GTID的复制就配置完成了。
GTID复制转成传统模式的方法：
如果之前启用过了GTID，那么就不能不能再使用传统的change master to的方式了，会报错，如下：
ERROR 1776 (HY000): Parameters MASTER_LOG_FILE, MASTER_LOG_POS,RELAY_LOG_FILE and RELAY_LOG_POS cannot be set when MASTER_AUTO_POSITION isactive.
要转换成传统模式，需要在my.cnf里面注释掉下面2行：
gtid-mode=ON
enforce_gtid_consistency = ON
然后重启MySQL。
解决方法：
> stop slave;
> show slave status\G
记录下当前复制到哪里了，如下图红色部分：
