2019-08-10T12:18:27.745963Z 7 [Note] Slave I/O thread for channel '': connected to master 'repl_user@192.168.43.81:3306',replication started in log 'mysql-bin.000001' at position 154 2019-08-10T12:18:

2019-08-10T12:18:27.745963Z 7 [Note] Slave I/O thread for channel '': connected to master 'repl_user@192.168.43.81:3306',replication started in log 'mysql-bin.000001' at position 154
2019-08-10T12:18:27.748074Z 7 [ERROR] Slave I/O for channel '': Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work. Error_code: 1593

上述错误提示，/var/log/mysqld.log

because master and slave have equal MySQL server UUIDs

应为我做实验使用的mysql是克隆的，所以MySQL server UUIDs处出现了问题
解决方法：
在mysql数据文件目录下有个auto.cnf文件，把他删掉，然后重启mysql服务，
重新启动slave，正常了