[Paraview] Setting up Paraview Web on a headless Fedora server with GPU

Fri May 6 10:54:16 EDT 2016

You are getting really close...

Basically you have the ParaView process that properly started at the
request of the client and waits to it to connect, which never happen.

Usually that mean, you have a mistake either in your Apache config and/or
in your launcher.

Could you share your Apache virtual host with your launcher config along
with the URL the web client connects to?

Seb

On Fri, May 6, 2016 at 5:47 AM, Jiří Vyskočil <jiri.vyskocil at fjfi.cvut.cz>
wrote:

> One more step closer to the goal it seems - if run:
>
>
> export XAUTHORITY=/var/run/slim/slim.auth
> DISPLAY=:0 xhost +
>
>
> as root, I can get the launcher to start, and not die with an X-related
> error (cumbersome workaround, but I guess I can find a better way later).
>
>
> [paraview at vbl-sim ~] $ cat /etc/httpd/paraview-mapping/proxy.txt
> be12802a-137f-11e6-b12c-002590e6af35 vbl-sim.eli-beams.eu:9003
>
> [paraview at vbl-sim ~] $ ps aux | grep pvpython
> paraview  1792  1.2  0.1 1393740 144956 pts/1  S+   13:42   0:02
> /usr/local/lib/paraview-5.0/pvpython
> /usr/local/lib/paraview-5.0/site-packages/vtk/web/launcher.py
> /etc/httpd/paraview-launcher.config -d
> paraview  1887  1.6  0.1 1519164 237520 pts/1  Sl+  13:43   0:02
> /usr/local/lib/paraview-5.0/pvpython -dr
> /usr/local/lib/paraview-5.0/site-packages/paraview/web/pv_web_visualizer.py
> --port 9003 --data-dir /var/paraview/data -f --authKey 3ZXwyWwTz7aPjT9p
>
>
> Now when I try to open an app from the browser, it still doesn't work
> (waits forever to load some part, etc.), and I see thist in the paraview
> log:
>
>
> [strazce at vbl-sim ~] $ cat
> /var/log/paraview-viz-logs/be12802a-137f-11e6-b12c-002590e6af35.txt
> 2016-05-06 13:43:27+0200 [-] Log opened.
> 2016-05-06 13:43:27+0200 [-] Site starting on 9003
> 2016-05-06 13:43:27+0200 [-] Starting factory <twisted.web.server.Site
> instance at 0x7fd34014f3b0>
> 2016-05-06 13:43:27+0200 [-]
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 2016-05-06 13:43:27+0200 [-]
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>
>
> and a lot of lines which contain just the repeating plus signs.
>
>
>
>
>
>
>
> On 05/05/16 16:23, Sebastien Jourdain wrote:
>
> You were on the right track with DISPLAY=:0 but I'm wondering if you setup
> a "virtual" monitor or if your "paraview" user is auto logged in a X
> session or if it stuck at the "login" panel?
>
> You can find some information about the virtual screen here: (Search for
> "Screen")
>
> http://kitware.github.io/paraviewweb/docs/guides/graphics_on_ec2_g2.html
>
> And for the autologin if it is needed. (Note on EC2 the user start X hence
> no need to login...)
>
>
> https://github.com/Kitware/paraviewweb/blob/master/tools/ansible/roles/paraview/tasks/Ubuntu.yml
>
> Seb
>
> On Thu, May 5, 2016 at 6:58 AM, Jiří Vyskočil <jiri.vyskocil at fjfi.cvut.cz>
> wrote:
>
>> Hello,
>>
>>
>> I'm trying to set up a Paraview Web server on a Fedora 23 machine. The
>> serves is not connected to a monitor or a keyboard (I only have access
>> through ssh), but it has a nvidia GPU which I want to use for paraview.
>>
>>
>> I have installed xdm to run the X server, and verified that it is in fact
>> running with the correct nvidia drivers (by checking the Xorg.0.log file).
>> The problem is I don't know how to run the paraview webserver on the X
>> display when there's no one physically logged in - I can only get to the
>> server via ssh. When I log in, and switch to the paraview user, the DISPLAY
>> and XAUTHORITY variables are empty.
>>
>>
>> The webserver itself is running (apache + the python launcher), but when
>> I try to open any of the example applications, I get an error like this:
>>
>>
>> $ ./launch-paraview.sh
>> 2016-05-05 14:54:17,528:INFO:twisted:Site starting on 9000
>> 2016-05-05 14:54:17,528:INFO:twisted:Starting factory
>> <twisted.web.server.Site instance at 0x7fe20da6a998>
>> 2016-05-05 14:55:09,655:INFO:twisted:"127.0.0.1" - -
>> [05/May/2016:12:55:09 +0000] "POST /paraview/ HTTP/1.1" 503 78 "
>> https://vbl-sim.eli-beams.eu/apps/Visualizer/" "Mozilla/5.0 (X11;
>> Fedora; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0"
>>
>>
>> $ cat 965318f2-12c0-11e6-a3cb-002590e6af35.txt
>> 2016-05-05 14:55:06+0200 [-] Log opened.
>> ERROR: In
>> /home/strazce/hax/ParaView-v5.0.0-source/VTK/Rendering/OpenGL/vtkXOpenGLRenderWindow.cxx,
>> line 333
>> vtkXOpenGLRenderWindow (0x3f00be0): bad X server connection. DISPLAY=
>>
>>
>> Specifying DISPLAY=:0 when running the launcher gives this error:
>>
>> $ cat e73921bc-12c0-11e6-b002-002590e6af35.txt
>> 2016-05-05 14:57:22+0200 [-] Log opened.
>> No protocol specified
>> No protocol specified
>> No protocol specified
>> ERROR: In
>> /home/strazce/hax/ParaView-v5.0.0-source/VTK/Rendering/OpenGL/vtkXOpenGLRenderWindow.cxx,
>> line 333
>> vtkXOpenGLRenderWindow (0x4127c10): bad X server connection. DISPLAY=:0.
>> Aborting.
>>
>>
>>
>> Thanks for any hints,
>>
>> Jiri
>>
>>
>>
>>
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>
>
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>
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>
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