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> On Behalf Of Ryan Novosielski Sent: den 25 februari 2020 21:23 To: 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> On Behalf Of Patrick Goetz >> Sent: den 24 februari 2020 21:38 To: >> 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 || \\ University | Sr. Technologist - 973/972.0922 ~*~ RBHS Campus || \\ of NJ | Office of Advanced Res. Comp. - MSB C630, Newark `' -----BEGIN PGP SIGNATURE----- iF0EARECAB0WIQST3OUUqPn4dxGCSm6Zv6Bp0RyxvgUCXlWCNgAKCRCZv6Bp0Ryx vjTSAJ9S7WA/rYjw5ylOljq9IpPqwTsHKACfbn/nnGJvE+QHvJoJ2djkkCQjMok= =Ju41 -----END PGP SIGNATURE-----
