我正在尝试在单节点集群上设置ambari。ambari的设置是以root用户的身份完成的，我尝试了所有与此相关的帖子，更改了权限并设置为权限http://docs.hortonworks.com/hdpdocuments/ambari-2.1.2.1/bk_installing_hdp_amb/content/_set_up_password-less_ssh.html

cd ~/.ssh
rm -rf /root/.ssh
ssh-keygen -t dsa
cat /root/.ssh/id_dsa.pub >> /root/.ssh/authorized_keys
cat  /root/.ssh/authorized_keys

在设置群集步骤时，从ambari中的上一行复制了密钥

ambari-server restart

当我尝试在linstall选项中注册和确认时，我得到了下面的错误，但是我可以执行“ssh”root@hadoop.maxsjohn.com 不给密码。

==========================
Creating target directory...
==========================

Command start time 2017-03-13 03:35:43

Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
SSH command execution finished
host=hadoop.maxsjohn.com, exitcode=255
Command end time 2017-03-13 03:35:43

ERROR: Bootstrap of host hadoop.maxsjohn.com fails because previous action finished with non-zero exit code (255)
ERROR MESSAGE: Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).

STDOUT: 
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).[Error Message][1]