Re: NFS mounted home, host RSA keys, localhost, strict sshds and bad mojo.

[Andreas Kostyrka <an...@kostyrka.org>]

Add a .ssh/config file and make it stop doing the hostkey check for
localhost.

Andreas


Am Freitag, den 21.03.2008, 12:25 -0400 schrieb Colin Freas:
> i'm working to set up a cluster across several machines where users' home
> dirs are on an nfs mount.
> 
> i setup key authentication for the hadoop user, install all the software on
> one node, get everything running, and move on to another node.
> 
> once there, however, my sshd complains because the host key associated with
> "localhost" is a different machine, and it refuses the connection.
> 
> i'm just testing here, so I can remove the localhost entry from
> .ssh/known_hosts, but, is this going to be an issue going forward if the
> home dirs are shared like this?
> 
> can i get hadoop to use the ip or the hostname instead of localhost?  i
> scanned the config files, but it didn't jump out at me.
> 
> 
> -colin

RE: NFS mounted home, host RSA keys, localhost, strict sshds andbad mojo.

[Peeyush Bishnoi <pe...@yahoo-inc.com>]

Hi ,

Yeah!!! you can tell hadoop to use the IP or hostname instead of localhost by specifying in hadoop configuration file i.e hadoop-site.xml . The parameters for hadoop-site.xml you can copy from hadoop-default.xml .

For NameNode:

<name>fs.default.name</name>
  <value><IP/Hostname>:54310</value>

For JobTracker:

 <name>mapred.job.tracker</name>
  <value><IP/Hostname>:54311</value>


For ssh related problem follow some nice online tutorial for enabling the passwordless connection across machines using same key. If you still not able to solve the problem . Let me know .

Thanks ,

---
Peeyush



-----Original Message-----
From: Andreas Kostyrka [mailto:andreas@kostyrka.org]
Sent: Sat 3/22/2008 2:01 AM
To: core-user@hadoop.apache.org
Subject: Re: NFS mounted home, host RSA keys, localhost, strict sshds andbad mojo.
 
Add a .ssh/config file and make it stop doing the hostkey check for
localhost.

Andreas


Am Freitag, den 21.03.2008, 12:25 -0400 schrieb Colin Freas:
> i'm working to set up a cluster across several machines where users' home
> dirs are on an nfs mount.
> 
> i setup key authentication for the hadoop user, install all the software on
> one node, get everything running, and move on to another node.
> 
> once there, however, my sshd complains because the host key associated with
> "localhost" is a different machine, and it refuses the connection.
> 
> i'm just testing here, so I can remove the localhost entry from
> .ssh/known_hosts, but, is this going to be an issue going forward if the
> home dirs are shared like this?
> 
> can i get hadoop to use the ip or the hostname instead of localhost?  i
> scanned the config files, but it didn't jump out at me.
> 
> 
> -colin