[mpich-discuss] MPICH2 for ARM

[Pavan Balaji]

Sorry, this looks like a networking problem. My guess would have been a 
firewall, but it looks like you already checked that. Maybe you should 
try getting the networking working without MPI first.

  -- Pavan

On 11/23/2011 05:07 AM, Harald Schuster wrote:
> Hi
>
> I am using neither ubuntu/debian nor Fedora/Redhat. I am using a self
> made kernel with buildroots for an microcontroller. But I found my
> Problem and so I am now able to start ssh on the controller and I am
> able to connect the both controllers via SSH. When I start the example
> from MPICH2 (cpi) with the two controllers as hosts I see on the passive
> conttroller that an ssh connection is set up and that he starts the
> hydra process manager. But then the active controller write "unable to
> get host address" and "unable to connect to server da830 at port 45409".
> Firewall is not active.
>
> Harald
>
> On 23.11.2011 09:05, Pavan Balaji wrote:
>>
>> Which Linux variant are you using? For Ubuntu/Debian, do:
>>
>> % sudo apt-get install openssh-server openssh-client
>>
>> For Fedora/Redhat, you'll need to do sudo yum install
>> some-ssh-package. Try google.
>>
>>   -- Pavan
>>
>> On 11/22/2011 08:50 AM, Harald Schuster wrote:
>>> Hi
>>>
>>> I know taht this is not a mpich2 question but i dont know where to
>>> search for help. After a lot of unsuccessfully test ssh is not running
>>> yet. I installed the openssh packet by the make menuconfig command in
>>> the buildroot. Then I create a new root file system with the buildroot.
>>> That works and the linux now knows the ssh command. When i go to
>>> /etc/init.d I found S50sshd and I executed ./S50sshd restart. After
>>> restarting he said ok but it doesn't works. When I start ssh
>>> root at localhost i got an connection refused message. Is there a special
>>> configuration necessary?! It is all running on a arm controller.
>>>
>>> Best regards
>>> Harald
>>>
>>>
>>> On 18.11.2011 17:34, Pavan Balaji wrote:
>>>> Hello,
>>>>
>>>> On 11/18/2011 07:10 AM, Harald Schuster wrote:
>>>>> So with the MPICH2 version 1.3.2 it works fine when I start the
>>>>> applications with -launcher fork. This is a big step forward and my
>>>>> next
>>>>> step is do start to controllers and let them communicate together.
>>>>> Until
>>>>> now it is possible to ping one controller from the other but i can not
>>>>> start Mpi via ssh. I installed openssh with make menuconfig in the
>>>>> buildroot butI always get the error “connection refused”. Do I need to
>>>>> include ssh in the kernel? I think it is a problem with the
>>>>> configuration of ssh but i have to lock. If you have any advice please
>>>>> write back. Thanks
>>>>
>>>> This is not really an MPICH2 related question, but I'll answer it
>>>> anyway. In the future, you might want to try other mailing lists that
>>>> help you with networking setup on your cluster.
>>>>
>>>> 1. I believe you need to install both openssh-server and
>>>> openssh-client. The openssh-client part gives you the "ssh" executable
>>>> and the server part gives you the "sshd" daemon that runs on all the
>>>> nodes. Once you install it, it should automatically start up; no extra
>>>> settings should be required. For example, on Ubuntu/Debian you can do
>>>> "sudo apt-get install openssh-server openssh-client".
>>>>
>>>> 2. You should setup password-less ssh. You should be able to google
>>>> for "ssh passwordless" and find a zillion links to tutorials on how to
>>>> do this.
>>>>
>>>> 3. Make sure your firewall is disabled. On Ubuntu/Debian, you can
>>>> disable it with "sudo ufw disable". On other platforms, google is your
>>>> friend.
>>>>
>>>> Once your ssh is setup fine, MPICH2 should automatically be able to
>>>> use it to launch processes remotely.
>>>>
>>>>    -- Pavan
>>>
>>> _______________________________________________
>>> mpich-discuss mailing list     mpich-discuss at mcs.anl.gov
>>> To manage subscription options or unsubscribe:
>>> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
>
> _______________________________________________
> mpich-discuss mailing list     mpich-discuss at mcs.anl.gov
> To manage subscription options or unsubscribe:
> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji