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Subject: Re: [OMPI users] Passwordless ssh
From: Reuti (reuti_at_[hidden])
Date: 2012-01-11 06:31:07


Hi,

Am 11.01.2012 um 05:46 schrieb Ralph Castain:

> You might want to ask that on the Beowulf mailing lists - I suspect it has something to do with the mount procedure, but honestly have no real idea how to resolve it.
>
> On Jan 10, 2012, at 8:45 PM, Shaandar Nyamtulga wrote:
>
>> Hi
>> I built Beuwolf cluster using OpenMPI reading the following link.
>> http://techtinkering.com/2009/12/02/setting-up-a-beowulf-cluster-using-open-mpi-on-linux/
>> I can do ssh to my slave nodes without the slave mpiuser's password before mounting my slaves.
>> But when I mount my slaves and do ssh, the slaves ask again their passwords.
>> Master and slaves' ssh directory and authorized_keys have permission 700, 600 respectively and
>> they owned only by owner mpiuser through chown.RSA has no passphrase.

it sounds like the ~/.ssh/authorized_keys on the master isn't containing its own public key (as in a plain sever you don't need it). Hence if you mount it on the slaves, it's missing again.

-- Reuti

>> Please help me on this matter.
>>
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