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<div dir="ltr" style="font-size:11.0pt;font-family:Calibri,Tahoma,Arial,Helvetica,sans-serif;color:black;">
Hi all, </div>
<div dir="ltr" style="font-size:11.0pt;font-family:Calibri,Tahoma,Arial,Helvetica,sans-serif;color:black;">
First off, thank you all for all of your quick replies and suggestions on how to solve this problem of mine.
</div>
<div dir="ltr"><font face="Calibri, Tahoma, Arial, Helvetica, sans-serif"><span style="font-size: 11pt;">With some additional help from Tina </span></font>
<span style="background-color: rgba(255, 255, 255, 0);">Friedrich </span> <span style="color: black; font-family: Calibri, Tahoma, Arial, Helvetica, sans-serif; font-size: 11pt;">
I did a test proposed by her:</span> </div>
<div dir="ltr"><span style="color: black; font-family: Calibri, Tahoma, Arial, Helvetica, sans-serif; font-size: 11pt;"><br>
</span></div>
<div dir="ltr">
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">First step: ”ssh -X <node>”.</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">Second step: ”ssh -X localhost”.</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">Third step: ”srun —x11 <script_to_be_performed_at_node>”</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);"><br>
</span></div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">(It should read a double ” -” but my mail-sw on this device doesnt let me do that, sorry!)</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">This actually worked and I got the X-application to be displayed at my working x-server/display. </span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);"><br>
</span></div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">So to summarize, I had to ssh to the node and when connected I ssh’d once more to the localhost (i.e the localhost at the node) and then started a ”srun”-session. This did work, I got the
X-forwarding to work and sent the X-application back to my available X-sever/screen.</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);"><br>
</span></div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">This isn’t really the way I aspected the srun nor X11-forwarding to work. I thought that I could run the srun-command with X11-forwarding called from an sbatch-jobarray-script and get the
X11-forwarding to my display. Yes I know that having 4000 nodes will pose a problem with a lot of X11-forwarding being sent, but that will not be a problem for me with only a handful of nodes and utlizing e.g xvfb.</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">I’ll work more on this matter now that I know a way of how to get it to work.</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);"><br>
</span></div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">Thank you!</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">Best regards,</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">Pär Lundö</span>
</div>
<br>
<hr style="color: black; font-family: Calibri, Tahoma, Arial, Helvetica, sans-serif; font-size: 11pt;">
<b style="color: black; font-family: Calibri, Tahoma, Arial, Helvetica, sans-serif; font-size: 11pt;">From:</b>
<font face="Calibri, Tahoma, Arial, Helvetica, sans-serif"><span style="font-size: 11pt;">"slurm-users" <slurm-users-bounces@lists.schedmd.com></span></font>
<br>
<b style="color: black; font-family: Calibri, Tahoma, Arial, Helvetica, sans-serif; font-size: 11pt;">Sent:</b>
<font face="Calibri, Tahoma, Arial, Helvetica, sans-serif"><span style="font-size: 11pt;">28 feb. 2020 17:52</span></font>
<br>
<b style="color: black; font-family: Calibri, Tahoma, Arial, Helvetica, sans-serif; font-size: 11pt;">To:</b>
<font face="Calibri, Tahoma, Arial, Helvetica, sans-serif"><span style="font-size: 11pt;">"wagner@itc.rwth-aachen.de" <wagner@itc.rwth-aachen.de></span></font>
<br>
<b style="color: black; font-family: Calibri, Tahoma, Arial, Helvetica, sans-serif; font-size: 11pt;">Cc:</b>
<font face="Calibri, Tahoma, Arial, Helvetica, sans-serif"><span style="font-size: 11pt;">"slurm-users@lists.schedmd.com" <slurm-users@lists.schedmd.com></span></font>
<br>
<b style="color: black; font-family: Calibri, Tahoma, Arial, Helvetica, sans-serif; font-size: 11pt;">Subject:</b>
<font face="Calibri, Tahoma, Arial, Helvetica, sans-serif"><span style="font-size: 11pt;">Re: [slurm-users] Slurm 19.05 X11-forwarding</span></font>
<br>
<br>
</div>
<div dir="ltr" style="font-size:11.0pt;font-family:Calibri,Tahoma,Arial,Helvetica,sans-serif;color:black;">
Hi Marcus, </div>
<div dir="ltr" style="font-size:11.0pt;font-family:Calibri,Tahoma,Arial,Helvetica,sans-serif;color:black;">
<br>
</div>
<div dir="ltr" style="font-size:11.0pt;font-family:Calibri,Tahoma,Arial,Helvetica,sans-serif;color:black;">
You are correct, but it doesnt show anything regarding the X11-forwarding. <br>
<br>
Thank you for your input! </div>
<div dir="ltr" style="font-size:11.0pt;font-family:Calibri,Tahoma,Arial,Helvetica,sans-serif;color:black;">
<br>
</div>
<div dir="ltr" style="font-size:11.0pt;font-family:Calibri,Tahoma,Arial,Helvetica,sans-serif;color:black;">
Best regards, </div>
<div dir="ltr" style="font-size:11.0pt;font-family:Calibri,Tahoma,Arial,Helvetica,sans-serif;color:black;">
Pär Lundö <br>
<hr>
<b>From:</b> "slurm-users" <slurm-users-bounces@lists.schedmd.com> <br>
<b>Sent:</b> 28 feb. 2020 15:57 <br>
<b>To:</b> "slurm-users@lists.schedmd.com" <slurm-users@lists.schedmd.com> <br>
<b>Subject:</b> Re: [slurm-users] Slurm 19.05 X11-forwarding <br>
<br>
</div>
Hi Pär, <br>
<br>
yes , you can -v or e.g. -vvv together with srun. I'm not sure, though, if taht shows anything X11-related, but you might try.
<br>
<br>
<br>
Best <br>
Marcus <br>
<br>
<div class="moz-cite-prefix">On 2/28/20 3:45 PM, Pär Lundö wrote: <br>
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<div dir="ltr">
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);"><br>
</span></div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);">Hi everyone</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);"><br>
</span></div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);">Thank you for your support.</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);">I’ve done a few changes and done some further testing but it has not solved my problem. </span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);">Regardless of the settings for the sshd I can’t get it to </span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);">I am able to use SSH to the node directly along with ”-X”-argument and get the X11 forwarding to work.</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);">Is there a debug output from srun to retrieve during the connection to the node?</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);">(Surely the simple answer to that is yes! I’ll try and locate that debug-function, or can someone help with that?)</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);"><br>
</span></div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);">Best regards,</span>
</div>
<div dir="ltr"><span style="background-color: rgba(255, 255,
255, 0);">Pär Lundö</span>
</div>
<div style="color: black; font-family: Calibri, Tahoma, Arial,
Helvetica, sans-serif; font-size: 11pt;">
<br>
</div>
<br>
<hr style="color: black; font-family: Calibri, Tahoma, Arial,
Helvetica, sans-serif; font-size: 11pt;">
<b style="color: black; font-family: Calibri, Tahoma, Arial,
Helvetica, sans-serif; font-size: 11pt;">From:</b>
<font face="Calibri, Tahoma, Arial, Helvetica, sans-serif"><span style="font-size: 11pt;">"slurm-users"
<a class="moz-txt-link-rfc2396E" href="mailto:slurm-users-bounces@lists.schedmd.com">
<slurm-users-bounces@lists.schedmd.com></a></span></font> <br>
<b style="color: black; font-family: Calibri, Tahoma, Arial,
Helvetica, sans-serif; font-size: 11pt;">Sent:</b>
<font face="Calibri, Tahoma, Arial, Helvetica, sans-serif"><span style="font-size: 11pt;">27 feb. 2020 12:29</span></font>
<br>
<b style="color: black; font-family: Calibri, Tahoma, Arial,
Helvetica, sans-serif; font-size: 11pt;">To:</b>
<font face="Calibri, Tahoma, Arial, Helvetica, sans-serif"><span style="font-size: 11pt;">"Slurm User Community List"
<a class="moz-txt-link-rfc2396E" href="mailto:slurm-users@lists.schedmd.com"><slurm-users@lists.schedmd.com></a></span></font>
<br>
<b style="color: black; font-family: Calibri, Tahoma, Arial,
Helvetica, sans-serif; font-size: 11pt;">Subject:</b>
<font face="Calibri, Tahoma, Arial, Helvetica, sans-serif"><span style="font-size: 11pt;">Re: [slurm-users] Slurm 19.05 X11-forwarding</span></font>
<br>
<br>
</div>
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hi Sean,
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>
</o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US" lang="EN-GB">Thank you for your reply.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US" lang="EN-GB">I will test it asap.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US" lang="EN-GB"><o:p>
</o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US" lang="EN-GB">Best regards,
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US" lang="EN-GB">Pär Lundö
<o:p></o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif" lang="EN-US">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif" lang="EN-US"> slurm-users
<a class="moz-txt-link-rfc2396E" href="mailto:slurm-users-bounces@lists.schedmd.com">
<slurm-users-bounces@lists.schedmd.com></a> <b>On Behalf Of </b>Sean Crosby<br>
<b>Sent:</b> den 27 februari 2020 10:26<br>
<b>To:</b> Slurm User Community List <a class="moz-txt-link-rfc2396E" href="mailto:slurm-users@lists.schedmd.com">
<slurm-users@lists.schedmd.com></a><br>
<b>Subject:</b> Re: [slurm-users] Slurm 19.05 X11-forwarding <o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<div>
<div>
<p class="MsoNormal">I remember that we had to add this to our /etc/ssh/sshd_config to get X11 to work with Slurm 19.05
<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">X11UseLocalhost no <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">We added this to our login nodes (where users ssh to), and then restarted the ssh server. You would then need to log out and log back in with X11 forwarding again.
<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Sean <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">--<br>
Sean Crosby | Senior DevOpsHPC Engineer and HPC Team Lead<br>
Research Computing Services | Business Services<br>
The University of Melbourne, Victoria 3010 Australia <o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">On Wed, 26 Feb 2020 at 20:52, Pär Lundö <<a href="mailto:par.lundo@foi.se">par.lundo@foi.se</a>> wrote:
<o:p></o:p></p>
</div>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi, <br>
<br>
Thank you for your quick replies.<br>
Please bear with me as I am a newbie regarding Slurm and Linux.<br>
My hostname is not a FQDN and I´m running Slurm on a local node (slurmctld and slurmuser are the same) just to verify that the X11-forwarding is working (amongst other things).<br>
The output of "xauth list" is as follows:<br>
"<br>
parlun-E6540/unix: MIT-MAGIC-COOKIE-1 bcf263421d143e6ba3297dfe926c68b8<br>
#ffff#7061726c756e2d4536353430#: MIT-MAGIC-COOKIE-1 bcf263421d143e6ba3297dfe926c68b8<br>
"<br>
I seem to be missing any ":0", i.e. to wich display or Xserver my user (parlun-E6540) uses?<br>
I´ve tried adding the user "slurm", who is designated slurmuser, via "xhost +SI:localuser:slurm" but I still get the error stating that the magic cookie could not be retrieved.<br>
<br>
You are correct, X11Parameters only holds one option "home_xauthority".<br>
Does this setting automatically search in the "/home/slurm"-dir for the Xauthority-file? (Given that the slurmuser is "slurm").<br>
Trying to locate the storage where xauthoriy is present, I do not find it my home-dir instead it is in some other OS-dir.<br>
<br>
Searching for additional help I came across a debian package (xvfb) for virtual framebuffers. i.e. video/GUI is sent to a virtual buffer instead of a physical display. Anyone tried that?<br>
I haven´t not yet installed it, but is curious if that´s a way to go.<br>
<br>
Best regards,<br>
Pär Lundö<br>
<br>
-----Original Message-----<br>
From: slurm-users <<a href="mailto:slurm-users-bounces@lists.schedmd.com" target="_blank">slurm-users-bounces@lists.schedmd.com</a>> On Behalf Of Ryan Novosielski<br>
Sent: den 25 februari 2020 21:23<br>
To: <a href="mailto:slurm-users@lists.schedmd.com" target="_blank">slurm-users@lists.schedmd.com</a><br>
Subject: Re: [slurm-users] Slurm 19.05 X11-forwarding<br>
<br>
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I seem to remember there being a config option to specify rewriting the hostname as well. I thought it was part of X11Parameters, but I only see one option there:<br>
<br>
<a href="https://slurm.schedmd.com/archive/slurm-19.05-latest/slurm.conf.html" target="_blank">https://slurm.schedmd.com/archive/slurm-19.05-latest/slurm.conf.html</a><br>
<br>
On 2/25/20 10:55 AM, Tina Friedrich wrote:<br>
> I remember having issues when I set up X forwarding that had to do <br>
> with how the host names were set on the nodes. I had them set (CentOS <br>
> default) to the fully qualified hostname, and that didn't work - with <br>
> an error message very similar to what you're getting, if memory serves <br>
> right. 'Fixed' it by setting the hostnames on all my cluster nodes to <br>
> the short version.<br>
><br>
> What does 'xauth list' give you on your nodes (and the machine you're <br>
> coming from)?<br>
><br>
> This is/was SLURM 18.08 though, not sure if that makes a difference.<br>
><br>
> Tina<br>
><br>
> On 25/02/2020 04:55, Pär Lundö wrote:<br>
>> Hi,<br>
>><br>
>> Thank you for your reply Patrick. I´ve tried that but I still get the <br>
>> error stating that the magic cookie could not be retrieved.<br>
>> Reading Tim´s answer, this bug should have been fixed in a release <br>
>> following 18.08, but I´m using 19.05 thus it should have been taken <br>
>> care of?<br>
>><br>
>> Best regards, Pär Lundö<br>
>><br>
>> -----Original Message----- From: slurm-users <br>
>> <<a href="mailto:slurm-users-bounces@lists.schedmd.com" target="_blank">slurm-users-bounces@lists.schedmd.com</a>> On Behalf Of Patrick Goetz
<br>
>> Sent: den 24 februari 2020 21:38 To:<br>
>> <a href="mailto:slurm-users@lists.schedmd.com" target="_blank">slurm-users@lists.schedmd.com</a> Subject: Re: [slurm-users] Slurm<br>
>> 19.05 X11-forwarding<br>
>><br>
>> This bug report appears to address the issue you're seeing:<br>
>><br>
>> <a href="https://bugs.schedmd.com/show_bug.cgi?id=5868" target="_blank">https://bugs.schedmd.com/show_bug.cgi?id=5868</a><br>
>><br>
>><br>
>><br>
>> On 2/24/20 4:46 AM, Pär Lundö wrote:<br>
>>> Dear all,<br>
>>><br>
>>> I started testing and evaluating Slurm roughly a year ago and used <br>
>>> it succesfully with MPI-programs. I have now identified that I need <br>
>>> to use X-forwarding in order to make use of an application needed to <br>
>>> run a GUI. However I seem not to be able to use the "X11Forwarding" <br>
>>> in Slurm.conf with any sucess. A simple test with srun as "srun - <br>
>>> -x11 <script-to-start>", yields an error stating: "srun: error: <br>
>>> x11_get_xauth: Could not retrieve magic cookie. Cannot use X11 <br>
>>> forwarding." I'm guessing that there some additional setting I'm <br>
>>> missing out on.<br>
>>> Searching through documentation does not reveal anything <br>
>>> extraordinary to be performed with the X11-forwarding. I have <br>
>>> searched bug-reports and found similiar problems but fixes have been <br>
>>> implemented in Slurm-versions prior to the one I am using.<br>
>>> In addition users have been reporting that the implementation made <br>
>>> by Slurm, now have fixed their issues. I have used the <br>
>>> "export=DISPLAY, HOME" as an additional argument for srun but <br>
>>> without any progress. Anyone with similiar problem who can aid or <br>
>>> advice me on howto use the X11Forward feature? Any help is much <br>
>>> appreciated.<br>
>>><br>
>>> I am running Slurm 19.05 and Ubuntu 18.10.<br>
>>><br>
>>> Best regards, Pär Lundö<br>
>>><br>
>>> This message is from an external sender. Learn more about why this <br>
>>> matters.<br>
>>> <<a href="https://ut.service-now.com/sp?id=kb_article&number=KB0011401" target="_blank">https://ut.service-now.com/sp?id=kb_article&number=KB0011401</a>><br>
>>><br>
>>><br>
>><br>
<br>
- --<br>
____<br>
|| <a>\\UTGERS</a>, |----------------------*O*------------------------<br>
||_// the State | Ryan Novosielski - <a href="mailto:novosirj@rutgers.edu" target="_blank">
novosirj@rutgers.edu</a><br>
|| \\ University | Sr. Technologist - 973/972.0922 ~*~ RBHS Campus<br>
|| \\ of NJ | Office of Advanced Res. Comp. - MSB C630, Newark<br>
`'<br>
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<pre class="moz-signature">--
Marcus Wagner, Dipl.-Inf.
IT Center
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: <a dir="ltr"></a><a dir="ltr" href="tel:+49%20241%2080-24383" x-apple-data-detectors="true" x-apple-data-detectors-type="telephone" x-apple-data-detectors-result="26/0">+49 241 80-24383</a>
Fax: <a dir="ltr"></a><a dir="ltr" href="tel:+49%20241%2080-624383" x-apple-data-detectors="true" x-apple-data-detectors-type="telephone" x-apple-data-detectors-result="26/1">+49 241 80-624383</a>
<a class="moz-txt-link-abbreviated" href="mailto:wagner@itc.rwth-aachen.de">wagner@itc.rwth-aachen.de</a>
<a class="moz-txt-link-abbreviated" href="http://www.itc.rwth-aachen.de">www.itc.rwth-aachen.de</a>
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