Re: using starcluster with a private AMI, ssh passwordless communication between nodes

From: Andrea La Rizza <no email>
Date: Mon, 20 Apr 2015 18:17:49 +0200

Thank Eduardo for your advice, it resolves my problem but not totally. I
don't receive the error anymore, the host files and the sgeadmin are
created, but I still have not ssh connectivity between nodes, logging to
the master node I'm not able to ssh connect to worker nodes from it.
Thank you.

Il 17/04/15 14:17, Eduardo Gurgel Valente ha scritto:
> Hi Andrea,
>
> Please checkout https://github.com/jtriley/StarCluster/issues/505
> It appears to be the same issue I had.
>
> Eduardo
>
> On Apr 17, 2015, at 7:31 AM, Andrea La Rizza <andrea.larizza_at_alef.it
> <mailto:andrea.larizza_at_alef.it>> wrote:
>
>> I'm using starcluster to manage an MPI cluster for parallel
>> scientific computation. I don't want to use the pre-installed OpenMPI
>> environment since the executables ? have to use are compiled with
>> Intel softwares. So I have my private CentOS AMI created from aws
>> console with all the Intel environment pre-installed. The problem is
>> that IntelMPI uses by default ssh connectivity without password
>> authentication to make nodes communicate amoung them to work. I want
>> to know if there is some feauture in the config starcluster file such
>> that ssh connectivity intra nodes comes pre setted with rsa
>> authentication. I have read that this feauture should be enabled by
>> default with the sgeadmin user, but when i launch the cluster at a
>> certain point I received this error:
>>
>> !! ERROR - Error occured while running plugin
>> 'starcluster.clustersetup.DefaultClusterSetup':
>> !!! ERROR - Cannot create user: (uid: 0, gid: 0). This is caused by
>> !!! ERROR - /home/ directory being owned by root. To fix this you'll
>> !!! ERROR - need to create a new AMI. Note that the instance is still
>> !!! ERROR - up.
>> and neither the user sgeadmin is created neither the /etc/hosts file
>> is filled with the names and IPs of all nodes of the cluster.
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Received on Mon Apr 20 2015 - 12:17:55 EDT