在ambari hadoop安装过程中，许可被拒绝（publickey，gssapi-keyex，gssapi-with-mic，密码）

问题描述

我尝试使用ambari部署hadoop集群，但是当我使用FQDN选择主机名并继续配置时，我得到ssh的权限被拒绝错误。

步骤：
1.使用ssh-keygen作为root生成rsa密钥。

1. 更改.ssh的权限（700）和authorized_keys（640）


2. 将公钥授予authorized_keys。


3. 并将公钥复制到所有主机（authorized_keys）和更改了文件权限，如上所述。
   
4. 我可以从ambari服务器主机向所有其他主机ssh无密码。

但是ambari没有执行hadoop安装，出现如下错误。

  SSH命令执行完成
 host = XXX，exitcode = 255 
命令结束时间2015-06-23 10:44:07 
 
错误：主机XXX的引导失败，因为上一个操作使用非零退出代码完成（255）
错误消息：权限被拒绝（publickey，gssapi-keyex， GSSAPI与 - 麦克风，密码）。 
 
 STDOUT：
权限被拒绝（publickey，gssapi-keyex，gssapi-with-mic，密码）。 
  

请不要将此问题标记为重复。我可以看到其他相同描述的问题，但没有一个提到有关Ambari ssh权限被拒绝的错误。

解决方案

与他的问题。

ssh -i< your_keypair> root @< your_host>
我试过这个，但是没有解决。

这是我的解决方案

host1 ip：192.168.1.21

host2 ip：192.168.1.22

p> host3 ip：192.168.1.23

在host1上：

  rm -rf /root/.ssh 
 ssh-keygen -t dsa 
 cat /root/.ssh/id_dsa.pub>> /root/.ssh/authorized_keys 
 scp /root/.ssh/id_dsa.pub host2：/ root / 
 scp /root/.ssh/id_dsa.pub host3：/ root / 
  

在host2上：

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

在host3上：

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

host1：/root/.ssh/id_dsa这是您需要。

I am trying to deploy a hadoop cluster using ambari, but when i select the hostnames with FQDN and proceed to configure I get the permission denied error for ssh.

STEPS:1. generated rsa key using ssh-keygen as root.

1. changed permission for .ssh(700) and authorized_keys(640)
2. cat the public key to authorized_keys.
3. and copied the public key to all the hosts(authorized_keys) and changed the file permission as above.
4. I could ssh passwordless from ambari server host to all the other hosts.

But from ambari is failing to do the hadoop installation with below error.

SSH command execution finished
host=XXX, exitcode=255
Command end time 2015-06-23 10:44:07

ERROR: Bootstrap of host XXX 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).

Please dont mark this question as a duplicate. I could see other questions with same description but none of them mention about the Ambari ssh permission denied error.

解决方案

I encountered the same problem with him.

ssh -i <your_keypair> root@<your_host>I tried this but it wasn't solved.

Here's my solution

host1 ip:192.168.1.21

host2 ip:192.168.1.22

host3 ip:192.168.1.23

on host1:

rm -rf /root/.ssh
ssh-keygen -t dsa
cat /root/.ssh/id_dsa.pub >> /root/.ssh/authorized_keys
scp /root/.ssh/id_dsa.pub host2:/root/
scp /root/.ssh/id_dsa.pub host3:/root/

on host2:

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

on host3:

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

host1:/root/.ssh/id_dsa This's the file which you need.

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