安装报错：host number:3 is different with host md5 number:1

这个是3台虚拟机安装时报错 host number:3 is different with host md5 number:1

查看gcinstall.py 3198行 发现如下注释

def CheckLicenseHostNum():
   """
   GBase8a MPP identifys a machine by /etc/ssh/ssh_host_rsa_key.pub file, if this file is NOT qualified, it is a security problem.
   The function CheckLicenseHostNum is to check whether /etc/ssh/ssh_host_rsa_key.pub is qualified for identifying a machine.
   There are cases that if a VM is a hard copy/clone of another one, but the /etc/ssh/ssh_host_rsa_key.pub is NOT regenerated.
   To fix the error, locate the conflict machine,just rm /etc/ssh/ssh_host_* and reboot it, rerun gcinstall.py will probably work.
   """

根据提示 可以先将 /etc/ssh/ssh_host_* 备份 ，然后 rm /etc/ssh/ssh_host_* ，然后 reboot