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

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: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
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 ï؟½yoshï؟½

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.
 
ï؟½cdï؟½ in there and you will see two files. Id_rsa (private key) and id_rsa_pub (public key).
 
If you create a file called ï؟½authorized_keysï؟½ 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 ï؟½ssh localhostï؟½ 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. ï؟½ssh < ip>ï؟½.  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 ï؟½hostname ï؟½iï؟½.
 
Happy hadoopï؟½ing.
 
AK47

 

 
From: yogesh dhari [mailto:[EMAIL PROTECTED]]
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.ï؟½
to the mailing llist.

Thanks & Regards

Yogesh Kumar
From: [EMAIL PROTECTED]

To: [EMAIL PROTECTED]

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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Thursday, October 25, 2012 4:28 AM

To: [EMAIL PROTECTED]

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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