[Paraview] A Forward Connection Over two ssh Tunnel

Wed Aug 20 01:57:19 EDT 2014

Thanks!

Sure, you can link it.
Just tell me if you spot some improvements.

Our stand-alone pvsc file does some more automated and rather "dark
magic" to build the described the tunnels up with one click. Its linked
there too.

Axel

On 19.08.2014 05:56, Utkarsh Ayachit wrote:
> Very cool! Thanks for sharing, Axel. It will be nice to link this page
> from the Wiki as a reference/example, if that's okay.
> 
> Utkarsh
> 
> On Mon, Aug 18, 2014 at 6:12 PM, Huebl, Axel <a.huebl at hzdr.de> wrote:
>> Dear Ehsan,
>>
>> I use a similar setup as Burlen, tunneling twice over a login node to
>> our cluster's head node.
>>
>> It also needs `GatewayPorts clientspecified` in the head node's
>> sshd_config to work with maximum comfort.
>> Feel free to check our wiki:
>>
>> https://github.com/ComputationalRadiationPhysics/picongpu/wiki/ParaView
>>
>> Best,
>> Axel
>>
>> On 18.08.2014 22:43, Burlen Loring wrote:
>>> Hi Utkarsh,
>>>
>>> Sure I can do that.
>>>
>>> Burlen
>>>
>>> On 08/18/2014 01:36 PM, Utkarsh Ayachit wrote:
>>>> Burlen,
>>>>
>>>> Very cool. When you get the chance, mind updating the Wiki?
>>>>
>>>> Thanks
>>>> Utkarsh
>>>>
>>>> On Mon, Aug 18, 2014 at 12:37 PM, Burlen Loring <bloring at lbl.gov> wrote:
>>>>> Hi Ehsan,
>>>>>
>>>>> As Utkarsh says you need to use a reverse connection. I suggest ncat
>>>>> instead
>>>>> of portfwd because portfwd is a long dead project with no support and
>>>>> it's
>>>>> failed to compile on some systems I used. Here's a schematic of the
>>>>> setup
>>>>>
>>>>> [work station]              [  login node    ]      [ compute node ]
>>>>> [  paraview  ]<-- ssh -R --<[ ncat + ncat -l ]<-----[ pvserver -rc ]
>>>>>
>>>>> in more detail:
>>>>> in your pvsc on the client
>>>>> ssh -R ${PORT}:localhost:${PORT} ${LOGIN_HOST} ...
>>>>>
>>>>> on the login node in a shell script referenced by the client's pvsc:
>>>>> let LOGIN_PORT=${PORT}+1
>>>>> ncat -l ${LOGIN_HOST} ${LOGIN_PORT} --sh-exec="ncat localhost $PORT" &
>>>>> qsub ...
>>>>>
>>>>> on the compute node in your batch script
>>>>> mpirun ... pvserver --reverse-connection --client-host ${LOGIN_HOST}
>>>>> --server-port ${LOGIN_PORT} ...
>>>>>
>>>>> You could skip ncat if you have control over the sshd config, you
>>>>> need to
>>>>> enable GatewayPorts.
>>>>>
>>>>> Burlen
>>>>>
>>>>>
>>>>> On 08/18/2014 08:18 AM, Utkarsh Ayachit wrote:
>>>>>
>>>>> It does boil down to using reverse connection and setting up recursive
>>>>> tunnels so that the pvserver and tunnel back to the client. See the
>>>>> following on the need for portfwd and how it could potentially be
>>>>> helpful here.
>>>>>
>>>>> http://www.paraview.org/Wiki/Reverse_connection_and_port_forwarding#Reverse_Connection_over_a_Reverse_ssh_Tunnel_with_portfwd
>>>>>
>>>>>
>>>>> On Mon, Aug 18, 2014 at 11:15 AM, ehsan saei <ehsan.saei at gmail.com>
>>>>> wrote:
>>>>>
>>>>> Dear Utkarsh,
>>>>> Thanks for your respond. I tried the section : " A forward connection
>>>>> over
>>>>> an ssh tunnel "
>>>>> but it doesn't work. The problem is that I have to ssh to one system and
>>>>> then ssh to the cluster again and finally I can submit a job. Do you
>>>>> have
>>>>> any other suggestions?
>>>>>
>>>>> thanks in advance,
>>>>> Ehsan
>>>>>
>>>>>
>>>>> On Mon, Aug 18, 2014 at 4:29 PM, Utkarsh Ayachit
>>>>> <utkarsh.ayachit at kitware.com> wrote:
>>>>>
>>>>> This may be of help:
>>>>> http://www.paraview.org/Wiki/Reverse_connection_and_port_forwarding
>>>>>
>>>>> Utkarsh
>>>>>
>>>>> On Mon, Aug 18, 2014 at 5:52 AM, ehsan saei <ehsan.saei at gmail.com>
>>>>> wrote:
>>>>>
>>>>> Hi all,
>>>>>
>>>>> I'm new to paraview. I try to run pvserver on a cluster. The problem is
>>>>> that
>>>>> I need to ssh twice to get access to the cluster. To use pvserver I
>>>>> submit a
>>>>> job on the cluster and then I run pvserver using the command
>>>>> "mpirun -np 12 pvserver"
>>>>> then I pick the name and port from terminal and use it in paraview
>>>>> client.
>>>>> but paraview can't find the pvserver. Is there any way to establish a
>>>>> connection via these two ssh tunnels?
>>>>>
>>>>> Thanks in advance,
>>>>> Ehsan
>>>>>
>>>>> _______________________________________________
>>>>> Powered by www.kitware.com
>>>>>
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>>>>> Please keep messages on-topic and check the ParaView Wiki at:
>>>>> http://paraview.org/Wiki/ParaView
>>>>>
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>>>>>
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>>>
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>>
>> --
>>
>> Axel Huebl
>> Diploma Student
>> Phone +49 351 260 3582
>> https://www.hzdr.de/crp
>> Computational Radiation Physics
>> Laser Particle Acceleration Division
>> Helmholtz-Zentrum Dresden - Rossendorf e.V.
>>
>> Bautzner Landstrasse 400, 01328 Dresden
>> POB 510119, D-01314 Dresden
>> Vorstand: Prof. Dr.Dr.h.c. R. Sauerbrey
>>           Prof. Dr.Dr.h.c. P. Joehnk
>> VR 1693 beim Amtsgericht Dresden
>>
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView
>>
>> Follow this link to subscribe/unsubscribe:
>> http://public.kitware.com/mailman/listinfo/paraview
>>
> 

-- 

Axel Huebl
Diploma Student
Phone +49 351 260 3582
https://www.hzdr.de/crp
Computational Radiation Physics
Laser Particle Acceleration Division
Helmholtz-Zentrum Dresden - Rossendorf e.V.

Bautzner Landstrasse 400, 01328 Dresden
POB 510119, D-01314 Dresden
Vorstand: Prof. Dr.Dr.h.c. R. Sauerbrey
          Prof. Dr.Dr.h.c. P. Joehnk
VR 1693 beim Amtsgericht Dresden

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