That's not the issue, here (though I have experienced that before). Regular ssh forwarding works fine.
On Tue, Oct 16, 2018 at 09:47:21AM +0100, Tina Friedrich wrote: > I had an issue getting x11 forwarding via SLURM (srun/sbatch) to work; ssh > worked fine. Tracked it down to the host name setting on the nodes; as per > RedHat/CentOS default, the hostname was set to the fully qualified. Turns out > SLURMs X11 forwarding doesn't work with that; setting the hostnames to the > short hostname made it all magically work. > > Tina > > On Tuesday, 16 October 2018 09:29:01 BST Olivier Sallou wrote: > > On 10/16/2018 01:07 AM, Dave Botsch wrote: > > > Hi. > > > > > > X11 forwarding is enabled and works for normal ssh. > > > > I faced same issue, with ssh x11 working as expected on compute nodes, > > but not with slurm -x11. > > > > I patched slurm locally to make it work. > > > > what you can try to see if it is the same issue: > > > > > > srun -n1 --pty --x11 --pty bash > > > > > > # xterm > > // you should have an authorization failure error > > > > // on connected node > > # xauth list > > > > you will have a list of MAGIC COOKIE like > > > > myslurmmaster/unix:10 MIT-MAGIC-COOKIE-1 YYYYYY > > myslurmnode/unix:52 MIT-MAGIC-COOKIE-1 XXXXXX > > > > # echo $DISPLAY > > localhost:52.0 > > > > > > To make it work manually I did (of course adapting node names and > > display port number): > > > > xauth remove myslurmnode/unix:52 > > xauth add localhost:52.0 > > > > then xterm (for example) worked. > > > > If this is the same problem, slurm can be easilly patched to work (can > > give you how) > > > > Olivier > > > > > Thanks. > > > > > > On Mon, Oct 15, 2018 at 09:55:59PM +0000, Rhian Resnick wrote: > > >> Double check /etc/ssh/sshd_config allows X11 forwarding on the node as it > > >> is disable by default. (I think) > > >> > > >> > > >> X11Forwarding yes > > >> > > >> > > >> > > >> > > >> Rhian Resnick > > >> > > >> Associate Director Research Computing > > >> > > >> Enterprise Systems > > >> > > >> Office of Information Technology > > >> > > >> > > >> Florida Atlantic University > > >> > > >> 777 Glades Road, CM22, Rm 173B > > >> > > >> Boca Raton, FL 33431 > > >> > > >> Phone 561.297.2647 > > >> > > >> Fax 561.297.0222 > > >> > > >> [image] <https://hpc.fau.edu/wp-content/uploads/2015/01/image.jpg> > > >> > > >> ________________________________ > > >> From: slurm-users <slurm-users-boun...@lists.schedmd.com> on behalf of > > >> Dave Botsch <bot...@cnf.cornell.edu> Sent: Monday, October 15, 2018 5:51 > > >> PM > > >> To: slurm-users@lists.schedmd.com > > >> Subject: [slurm-users] x11 forwarding not available? > > >> > > >> > > >> > > >> Wanted to test X11 forwarding. X11 forwarding works as a normal user > > >> just ssh'ing to a node and running xterm/etc. > > >> > > >> With srun, however: > > >> > > >> srun -n1 --pty --x11 xterm > > >> srun: error: Unable to allocate resources: X11 forwarding not available > > >> > > >> So, what am I missing? > > >> > > >> Thanks. > > >> > > >> PS > > >> > > >> srun --version > > >> slurm 17.11.7 > > >> > > >> rpm -qa |grep slurm > > >> ohpc-slurm-server-1.3.5-8.1.x86_64 > > >> ... > > >> > > >> > > >> -- > > >> ******************************** > > >> David William Botsch > > >> Programmer/Analyst > > >> @CNFComputing > > >> bot...@cnf.cornell.edu > > >> ******************************** > > >> -- > > >> ******************************** > > >> David William Botsch > > >> Programmer/Analyst > > >> @CNFComputing > > >> bot...@cnf.cornell.edu > > >> ******************************** > > > -- > Tina Friedrich, Snr HPC Systems Administrator, Advanced Research Computing > Research Computing and Support Services, Academic IT > IT Services, University of Oxford > http://www.arc.ox.ac.uk > -- ******************************** David William Botsch Programmer/Analyst @CNFComputing bot...@cnf.cornell.edu ********************************
