报错The authenticity of host 'master (172.17.0.37)' can't be established.

[root@master /]# ssh master
The authenticity of host 'master (172.17.0.37)' can't be established.
RSA key fingerprint is df:41:8b:71:b5:bc:06:f6:d7:be:ef:3a:32:e6:64:f4.
Are you sure you want to continue connecting (yes/no)? y
Please type 'yes' or 'no': yes
Warning: Permanently added 'master,172.17.0.37' (RSA) to the list of known hosts.

解决方案

[root@master ~]# ssh -o StrictHostKeyChecking=no master
Last login: Mon Nov  6 22:00:21 2017 from master
[root@master ~]#