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Hi Sebastien,<br>
<br>
sorry to make you dig into old memories :S<br>
so far I have been able to achieve the goals thanks to the
documentation and help. Last thing I tried was to connect the
visualizer to pv server in parallel. The help contents (--help) of
bin/pvserver and the pvw-visualizer.py helped me to figure it out
(all I had to do is use "reverse connection" and have pvserver
connect to paraviewweb).<br>
<br>
I don't think it's possible to document every single possibility and
that's where the code quality+comment and built-in help are very
useful and complete. I will let you know if I find anything but so
far so amazingly good.<br>
<br>
<br>
Regarding the EC2 at startup (pvw-start service running
/data/start.sh), only DNS_NAME (ec2-xxxx-compute1-amazonaws.com) is
fetched and replaced in the {apache/launcher}-TEMPLATE.{conf/json}
files. I didn't see any other variable in there. <br>
<br>
After checking with JSONLint, the launcher JSON file is indeed
valid.<br>
<br>
Paying more attention to the network requests, I don't see the
failed GET and WS switching protocol requests anymore. Even more
strange, when I move the camera, I can see the stack of black/blank
frames being send by the server (axis are not visible either).<br>
<br>
By the way I used this config:<br>
* apache.conf<br>
RewriteCond %{QUERY_STRING} ^sessionId=(.*)&path=(.*)$ [NC]<br>
RewriteRule ^/proxy.*$ <a class="moz-txt-link-freetext" href="ws://$">ws://$</a>{session-to-port:%1}/%2 [P]<br>
<br>
* launcher.json<br>
"sessionURL" : <a class="moz-txt-link-rfc2396E" href="ws://DNS_NAME/proxy?sessionId=${id}&path=ws">"ws://DNS_NAME/proxy?sessionId=${id}&path=ws"</a>,<br>
<br>
As I am writing this, I just restarted the instance
(terminate+launch) instead of reboot and it is now working... I went
back to see the logs of failed remote viewing and I can now see this
at the very end (after proper launching and everything):<br>
<font size="-1" face="Courier New, Courier, monospace">XIO: fatal
IO error 0 (Success) on X server ":0.0"</font><br>
<br>
So here is what I am guessing:<br>
- I messed up something in the config files yesterday as I didn't
get to that point<br>
- rebooting the instance doesn't start X properly, which fails to
render the 3D view and explains why the frames are blank but
everything else is fine. <br>
- somehow re-launching the instance starts X properly.<br>
<br>
I am puzzled but also happy that it seems to be working :)<br>
Do you know what would be the reasons for this issue with X? Since I
started from the pv AMI, I didn't have to install any drivers nor
configure the display. Maybe I'll try a fresh AMI with ubuntu-16 and
install the drivers nvidia-367 to see if I encounter similar issues
with X.<br>
<br>
Thanks for the pointers Sebastien.<br>
<br>
cheers,<br>
Claude<br>
<br>
<div class="moz-cite-prefix">On 01/19/2017 06:19 PM, Sebastien
Jourdain wrote:<br>
</div>
<blockquote
cite="mid:CABObKxfJEjO5C7=6zZFPRQJ6LgR=3WXonUZPth3VpScoTJRpAA@mail.gmail.com"
type="cite">
<div dir="ltr">Hi Claude,
<div><br>
</div>
<div>I'm glad you like our doc and code. If you feel we are
missing something that is not obvious, please report it so we
can fix it.</div>
<div><br>
</div>
<div>Regarding your issue, you had a good reflex in fixing
apache and the launcher config, as with PV5.2 we use a second
ws connection for streaming the images in binary format. But
it has been forever since I setup that ami, I have very little
memory of what was setup.</div>
<div><br>
</div>
<div>I do know that we use 'sed' to dynamically replace some
string so the proper HOST for apache and the launcher get
used, but I don't remember if it was <span
style="font-size:12.8px">DNS_NAME or something else</span>.
But from what I understand, you've done exactly what I would
have done myself.</div>
<div><br>
</div>
<div>I'm wondering if when you edited your launcher config you
managed to produce an invalid JSON file. (You can paste it
here <a moz-do-not-send="true" href="http://jsonlint.com/">http://jsonlint.com/</a>
to be sure)</div>
<div><br>
</div>
<div>Moreover, seeing the network calls of the web page that
don't even load might be useful. I'd be curious to see the
response of the POST on /paraview.</div>
<div><br>
</div>
<div>Seb</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Jan 19, 2017 at 5:01 PM, claude
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:claude@theweak.link" target="_blank">claude@theweak.link</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hello!<br>
<br>
Following up one of the previous thread on setting up<br>
ParaviewWeb+Visualizer, I am trying to get it going on AWS
EC2 with<br>
paraview-5.2. Maybe someone already went through it and know
how to<br>
solve this little problem?<br>
<br>
* I launched the public AMI (ami-34f3f65e) on Ubuntu-14 with
paraviewweb<br>
4.4 which seemed like a good starting point.<br>
* I tested the visualizer on paraviewweb-4.4 and works
perfectly.<br>
* I downloaded paraviewweb-5.2 and updated the 'pv' and
'www' symlinks<br>
under /data folder (see 'aws_data_dir' snapshot attached).<br>
* I also updated the paths in the start.sh,
apache-TEMPLATE.conf and<br>
launcher-TEMPLATE.json files so that they reflect the
correct path for<br>
paraview-5.2 (which are bit different than paraview-4.4). By
the way,<br>
having start.sh running as a service at startup configuring
properly the<br>
TEMPLATE files with the proper DNS name is admirable (each
time I look<br>
at the doc, config files or code, I am amazed by the quality
of it,<br>
thumb up!).<br>
* when I navigate to the EC2 DNS, the Visualizer comes up
and I can<br>
browse for data files. The files seem to successfully load
but nothing<br>
show up in the camera (see snapshot 'aws_ec2_visu'). Looking
at the logs<br>
on the machine, they don't report any error (and look
similar to what I<br>
can get locally on my machine). There is a couple of errors
showing up<br>
in the web console though (in the snapshot attached).<br>
<br>
It looks like I am very close to make it work, I am probably
missing<br>
something obvious.<br>
I tried the following to solve it by using my configuration
on my local<br>
machine:<br>
1. update the apache-TEMPLATE.conf with the following rules:<br>
RewriteCond %{QUERY_STRING} ^sessionId=(.*)&path=(.*)$
[NC]<br>
RewriteRule ^/proxy.*$ <a class="moz-txt-link-freetext" href="ws://$">ws://$</a>{session-to-port:%1}/%2 [P]<br>
<br>
2. update the launcher-TEMPLATE.json with the following
line:<br>
"sessionURL" : "<a class="moz-txt-link-freetext" href="ws://DNS_NAME/proxy">ws://DNS_NAME/proxy</a>?<wbr>sessionId=${id}&path=ws",<br>
<br>
3. reboot (so that the files get updated)<br>
<br>
but this time the UI doesn't even load, meaning I made it
worse.<br>
<br>
It seems just like a websocket connection issue, right?<br>
<br>
Thanks in advance for any ideas to try.<br>
cheers<br>
<span class="HOEnZb"><font color="#888888">claude<br>
</font></span><br>
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</blockquote>
</div>
<br>
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</blockquote>
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