1、关键步骤

change master to        master_host='172.16.192.201',    master_port=3306,    master_user='repl',    master_password='123456',    master_auto_position=1    for channel 'master201';start slave IO_THREAD for channel 'master201';start slave SQL_THREAD for channel 'master201';change master to        master_host='172.16.192.202',    master_port=3306,    master_user='repl',    master_password='123456',    master_auto_position=1    for channel 'master202';start slave IO_THREAD for channel 'master202';start slave SQL_THREAD for channel 'master202';