Hi Pär,
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.
Best
Marcus
On 2/28/20 3:45 PM, Pär Lundö wrote:
Hi everyone
Thank you for your support.
I’ve done a few changes and done some further testing but it has not
solved my problem.
Regardless of the settings for the sshd I can’t get it to
I am able to use SSH to the node directly along with ”-X”-argument and
get the X11 forwarding to work.
Is there a debug output from srun to retrieve during the connection to
the node?
(Surely the simple answer to that is yes! I’ll try and locate that
debug-function, or can someone help with that?)
Best regards,
Pär Lundö
------------------------------------------------------------------------
*From:* "slurm-users" <slurm-users-boun...@lists.schedmd.com>
*Sent:* 27 feb. 2020 12:29
*To:* "Slurm User Community List" <slurm-users@lists.schedmd.com>
*Subject:* Re: [slurm-users] Slurm 19.05 X11-forwarding
Hi Sean,
Thank you for your reply.
I will test it asap.
Best regards,
Pär Lundö
*From:*slurm-users <slurm-users-boun...@lists.schedmd.com> *On Behalf
Of *Sean Crosby
*Sent:* den 27 februari 2020 10:26
*To:* Slurm User Community List <slurm-users@lists.schedmd.com>
*Subject:* Re: [slurm-users] Slurm 19.05 X11-forwarding
I remember that we had to add this to our /etc/ssh/sshd_config to get
X11 to work with Slurm 19.05
X11UseLocalhost no
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.
Sean
--
Sean Crosby | Senior DevOpsHPC Engineer and HPC Team Lead
Research Computing Services | Business Services
The University of Melbourne, Victoria 3010 Australia
On Wed, 26 Feb 2020 at 20:52, Pär Lundö <par.lu...@foi.se
<mailto:par.lu...@foi.se>> wrote:
Hi,
Thank you for your quick replies.
Please bear with me as I am a newbie regarding Slurm and Linux.
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).
The output of "xauth list" is as follows:
"
parlun-E6540/unix: MIT-MAGIC-COOKIE-1
bcf263421d143e6ba3297dfe926c68b8
#ffff#7061726c756e2d4536353430#: MIT-MAGIC-COOKIE-1
bcf263421d143e6ba3297dfe926c68b8
"
I seem to be missing any ":0", i.e. to wich display or Xserver my
user (parlun-E6540) uses?
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.
You are correct, X11Parameters only holds one option
"home_xauthority".
Does this setting automatically search in the "/home/slurm"-dir
for the Xauthority-file? (Given that the slurmuser is "slurm").
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.
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?
I haven´t not yet installed it, but is curious if that´s a way to go.
Best regards,
Pär Lundö
-----Original Message-----
From: slurm-users <slurm-users-boun...@lists.schedmd.com
<mailto:slurm-users-boun...@lists.schedmd.com>> On Behalf Of Ryan
Novosielski
Sent: den 25 februari 2020 21:23
To: slurm-users@lists.schedmd.com
<mailto:slurm-users@lists.schedmd.com>
Subject: Re: [slurm-users] Slurm 19.05 X11-forwarding
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
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:
https://slurm.schedmd.com/archive/slurm-19.05-latest/slurm.conf.html
On 2/25/20 10:55 AM, Tina Friedrich wrote:
> I remember having issues when I set up X forwarding that had to do
> with how the host names were set on the nodes. I had them set
(CentOS
> default) to the fully qualified hostname, and that didn't work -
with
> an error message very similar to what you're getting, if memory
serves
> right. 'Fixed' it by setting the hostnames on all my cluster
nodes to
> the short version.
>
> What does 'xauth list' give you on your nodes (and the machine
you're
> coming from)?
>
> This is/was SLURM 18.08 though, not sure if that makes a difference.
>
> Tina
>
> On 25/02/2020 04:55, Pär Lundö wrote:
>> Hi,
>>
>> Thank you for your reply Patrick. I´ve tried that but I still
get the
>> error stating that the magic cookie could not be retrieved.
>> Reading Tim´s answer, this bug should have been fixed in a release
>> following 18.08, but I´m using 19.05 thus it should have been
taken
>> care of?
>>
>> Best regards, Pär Lundö
>>
>> -----Original Message----- From: slurm-users
>> <slurm-users-boun...@lists.schedmd.com
<mailto:slurm-users-boun...@lists.schedmd.com>> On Behalf Of
Patrick Goetz
>> Sent: den 24 februari 2020 21:38 To:
>> slurm-users@lists.schedmd.com
<mailto:slurm-users@lists.schedmd.com> Subject: Re: [slurm-users]
Slurm
>> 19.05 X11-forwarding
>>
>> This bug report appears to address the issue you're seeing:
>>
>> https://bugs.schedmd.com/show_bug.cgi?id=5868
>>
>>
>>
>> On 2/24/20 4:46 AM, Pär Lundö wrote:
>>> Dear all,
>>>
>>> I started testing and evaluating Slurm roughly a year ago and
used
>>> it succesfully with MPI-programs. I have now identified that I
need
>>> to use X-forwarding in order to make use of an application
needed to
>>> run a GUI. However I seem not to be able to use the
"X11Forwarding"
>>> in Slurm.conf with any sucess. A simple test with srun as "srun -
>>> -x11 <script-to-start>", yields an error stating: "srun: error:
>>> x11_get_xauth: Could not retrieve magic cookie. Cannot use X11
>>> forwarding." I'm guessing that there some additional setting I'm
>>> missing out on.
>>> Searching through documentation does not reveal anything
>>> extraordinary to be performed with the X11-forwarding. I have
>>> searched bug-reports and found similiar problems but fixes
have been
>>> implemented in Slurm-versions prior to the one I am using.
>>> In addition users have been reporting that the implementation
made
>>> by Slurm, now have fixed their issues. I have used the
>>> "export=DISPLAY, HOME" as an additional argument for srun but
>>> without any progress. Anyone with similiar problem who can aid or
>>> advice me on howto use the X11Forward feature? Any help is much
>>> appreciated.
>>>
>>> I am running Slurm 19.05 and Ubuntu 18.10.
>>>
>>> Best regards, Pär Lundö
>>>
>>> This message is from an external sender. Learn more about why
this
>>> matters.
>>> <https://ut.service-now.com/sp?id=kb_article&number=KB0011401>
>>>
>>>
>>
- --
____
|| \\UTGERS, |----------------------*O*------------------------
||_// the State | Ryan Novosielski - novos...@rutgers.edu
<mailto:novos...@rutgers.edu>
|| \\ University | Sr. Technologist - 973/972.0922 ~*~ RBHS Campus
|| \\ of NJ | Office of Advanced Res. Comp. - MSB C630, Newark
`'
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--
Marcus Wagner, Dipl.-Inf.
IT Center
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: +49 241 80-24383
Fax: +49 241 80-624383
wag...@itc.rwth-aachen.de
www.itc.rwth-aachen.de
