[mpich-discuss] MPICH2 for ARM

[Harald Schuster]

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