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From yogesh dhari <yogeshdh...@live.com>
Subject RE: ERROR:: SSH failour for distributed node hadoop cluster
Date Thu, 25 Oct 2012 17:13:35 GMT

Thanks Andy,

I got your point :-),

What I have done earlier..

I have configured 

1) One as a Master ( plays role of 
both Name node and Data Node)

2) Second as a Slave ( 
Only date node)



I have give same name to both Machines and they have Admin access.
pluto ( for both Master and Slave).



and generated ssh key pair through this way



Master:~ mediaadmin$ ssh-keygen -t rsa -P " "

Generating public/private rsa key pair.

Enter file in which to save the key (/Users/mediaadmin/.ssh/id_rsa): 

/Users/mediaadmin/.ssh/id_rsa already exists.

Overwrite (y/n)? y

Your identification has been saved in /Users/mediaadmin/.ssh/id_rsa.

Your public key has been saved in /Users/mediaadmin/.ssh/id_rsa.pub.

The key fingerprint is:

32:0f:be:7a:ea:44:a1:4a:b6:b1:85:3f:1f:56:48:4b mediaadmin@Master

The key's randomart image is:

+--[ RSA 2048]----+

|                 |

|                 |

|    .E           |

|  ..o.o          |

| =...o+.S        |

|o.*. ..=         |

|.o o.o. .        |

|   .+ o.         |

|   .+=.          |

+-----------------+

Copy to home

Master:~ mediaadmin$ cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys





and copy to Slave Node as 

mediaadmin$ cat ~/.ssh/id_rsa.pub | ssh pluto@Slave 'cat >> ~/.ssh/authorized_keys'





Login to Slave node

Master:~ mediaadmin$ ssh pluto@Slave

Last login: Thu Oct 25 18:54:15 2012 from 10.203.33.80





and Log out

plutos-iMac:~ pluto$ exit

logout



Connection to Slave closed.





Login to Master node (here it asks for password)

Master:~ mediaadmin$ ssh Master

Password:

Last login: Thu Oct 25 19:03:27 2012 from master


HERE COMES THE ISSUE



when I run start-dfs.sh, its asks for password and I did enter the pass word of Master but
i didn't accept.




Master:~ mediaadmin$ start-dfs.sh

starting namenode, logging to /HADOOP/hadoop-0.20.2/bin/../logs/hadoop-mediaadmin-namenode-Master.out

Password:Password:

Password:

Password:

Slave: Permission denied (publickey,keyboard-interactive).



Password:

Master: starting datanode, logging to /HADOOP/hadoop-0.20.2/bin/../logs/hadoop-mediaadmin-datanode-Master.out

Password:

Master: starting secondarynamenode, logging to /HADOOP/hadoop-0.20.2/bin/../logs/hadoop-mediaadmin-secondarynamenode-Master.out









When I enter password of Slave then it again goes like this.



Master:~ mediaadmin$ start-dfs.sh

starting namenode, logging to /HADOOP/hadoop-0.20.2/bin/../logs/hadoop-mediaadmin-namenode-Master.out

Password:Password:

Password:

Password:

Password:

Password:

Master: Permission denied (publickey,keyboard-interactive).



Slave: Permission denied (publickey,keyboard-interactive).

Password:

Password:

Password:

Master: Permission denied (publickey,keyboard-interactive).









Please suggest me where I am going wrong, and why is asking for password when I configured
it as password less SSH,



where I doing mistake in SSH or some thing else.





Thanks & Regards

Yogesh Kumar Dhari


From: Andy.Kartashov@mpac.ca
To: user@hadoop.apache.org
Subject: RE: ERROR:: SSH failour for distributed node hadoop cluster
Date: Thu, 25 Oct 2012 16:37:36 +0000








Yogesh,
 
One need to understand how passwordless ssh work.
 
Say there is a user “yosh”

He types ssh localhost and is prompted for a password. This is how to resolve this.
 
1.
Type : ssh-keygen -t rsa
 
-t stand for type and rsa (encryption)  - another type will be dsa.
 
Well, after you run above command,  a pair of private and public keys is generated and stored
in your /home/yosh/.ssh folder.
 
“cd” in there and you will see two files. Id_rsa (private key) and id_rsa_pub (public
key).
 
If you create a file called “authorized_keys” and place your public key in there you will
achieve psswdless access. How to do it?
 
2.
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
 
The above command reads your PubKey and appends to the file. After that try “ssh localhost”
again. Voila! No more password request.
 
Now, imagine you are ssh-ing into this very same machine from another computer where u  log-in
as yosh. “ssh < ip>”.  The machine will similarly let you in
 without password.
 
p.s. If you do not know ip address of that machine, find out by simply typing “hostname
–i”.
 
Happy hadoop’ing.
 
AK47

 

 


From: yogesh dhari [mailto:yogeshdhari@live.com]


Sent: Thursday, October 25, 2012 12:12 PM

To: hadoop helpforoum

Subject: RE: ERROR:: SSH failour for distributed node hadoop cluster


 



Hi Andy,



I am still at that point, not able to solve it yet



Please help, Same issue with all settings and commands I have raise by Subject 

ERROR: : Hadoop Installation in distributed mode.‏
to the mailing llist.





Thanks & Regards

Yogesh Kumar








From: Andy.Kartashov@mpac.ca

To: user@hadoop.apache.org

Subject: RE: ERROR:: SSH failour for distributed node hadoop cluster

Date: Thu, 25 Oct 2012 16:01:56 +0000

Yogesh,
 
Have you figured it out?  I had the same issue (needed passwordless ssh) and managed. Let
me know if you are still stuck.

 
AK47
 


From: yogesh.kumar13@wipro.com [mailto:yogesh.kumar13@wipro.com]


Sent: Thursday, October 25, 2012 4:28 AM

To: user@hadoop.apache.org

Subject: ERROR:: SSH failour for distributed node hadoop cluster

Importance: High


 

Hi all,




I am trying to run the command



ssh Master



it runs and shows after entering password. 

Password: abc

Last login: Thu Oct 25 13:51:06 2012 from master



But ssh for Slave through error.







ssh Slave



it asks for password ans denie



Password: abc

Password: abc

Password: abc

Permission denied (publickey,keyboard-interactive).



Please suggest.

Thanks & regards

Yogesh Kumar

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NOTICE: This e-mail message and any attachments are confidential, subject to copyright and
may be privileged. Any unauthorized use, copying or disclosure is prohibited. If you are not
the intended recipient, please delete and contact the sender immediately.
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