[slurm-users] SLURM 20.11.0 no x11 forwarding.

[Rodrigo Santibáñez]

Did you compile SLURM with x11 support?

El jue, 22 abr 2021 a las 15:21, Luis R. Torres (<lrtorres at gmail.com>)
escribió:

> Hi Folks,
>
> I'm currently running a small but powerful 10 node cluster where we
> require the scheduling of certain graphical apps.  Our SLURM version is
> 20.11.0, half our nodes are RHEL7 and the other half Ubuntu 18.04.
>
> Our slurm config related to x11 is:
>
> PrologFlags=*x*11
>
> *X*11Parameters=home_*x*authority
>
> We get the following error when attempting to use forwarding using SLURM
>
>
> srun --nodelist=node01 --x11 xeyes
>
> X11 connection rejected because of wrong authentication.
>
> Error: Can't open display: localhost:78.0
>
> srun: error: node01: task 0: Exited with exit code 1
>
> The steps we take are:
> ssh -X user at login-node
> [user at login-node]$ srun --nodelist=node01 --x11 xeyes
>
> No user accounts are allowed to SSH directly into execution nodes, only a
> few special user accounts, however, those accounts have issues when using
> --x11 but have NO issues when connecting directly (and forwarding) to the
> execution nodes.
>
> We went through this group to determine if anyone else has had similar
> issues resolved but I didn't find anything other than some
> recommendations.  Has someone actually resolved this particular (or very
> similar) issue?
>
> Our sshd_config is as follows:
>
> X11Forwarding yes
>
> X11DisplayOffset 10
>
> X11UseLocalhost no
>
>
> Our cluster is configured with SlurmUser=slurm, not root.
>
>
> Thanks,
> --
> ----------------------------------------
> Luis R. Torres
>
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