-----------------------+
| mysql-bin.000001 | 452 | | | |
+------------------+----------+--------------+------------------+-----------------------------------------------------+
在master2、slave1和slave2执行
mysql> change master to master_host='192.168.31.83',master_port=3306,master_user='rep',master_password='123456',master_log_file='mysql-bin.000001',master_log_pos=452;
mysql>slave start;
验证主从复制：
master2主机：
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.31.83
Master_User: rep
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 452
Relay_Log_File: relay-bin.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
slave1主机：
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.31.83
Master_User: rep
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 452
Relay_Log_File: relay-bin.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
slave2主机：
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.31.83
Master_User: rep
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 452
Relay_Log_File: relay-bin.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
如果Slave_IO_Running和Slave_SQL_Running都为yes，那么主从就已经配置OK了
把master1配置成master2的从库:
在master2上执行show master status ;获取binlog文件和Position点
mysql> show master status;
+------------------+----------+--------------+------------------+--------------------------------------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+---------------------------------------------------+
| mysql-bin.000001 | 452 | | | |
+------------------+----------+--------------+------------------+----------------------------------------------------+
在master1上执行：
mysql> change master to master_host='192.168.31.141',master_port=3306,master_user='rep',master_password='123456',master_log_file='mysql-bin.000001',master_log_pos=452;
mysql> start slave;
验证主从复制：
master1主机:
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.31.141
Master_User: rep
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 452
Relay_Log_File: relay-bin.000002
Relay_Log_Pos: 320
Relay_Mast