服务器做了格式化后（ip没变），jenkins自动部署报错

jenkins自动部署报错如下：
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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
d0:00:7c:bc:88:5c:dc:de:89:61:44:30:00:60:f9:b2.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending key in /root/.ssh/known_hosts:1
RSA host key for 192.168.x.xxx has changed and you have requested strict checking.
Host key verification failed.

出现原因：

ssh登录过的服务器的RSA公钥保存在.ssh/known_hosts中，由于格式化了服务器磁盘，但还用的相同IP，这会导致公钥与服务器的私钥配对失败，无法登陆服务器。这时候需要删除旧服务器的公钥才行。

解决方案：

在jenkins的服务器上vim ~/.ssh/known_hosts

删除服务器ip的相关rsa的信息即可.