[slurm-users] Slurm 17.11 X11 support questions

[Mjelde, Matthew J]

Thanks Marcus.  I thought I had installed that dependency, but I guess I installed it somewhere other than where I was compiling slurm at.  Once installed it compiled with x11 support.

However, now I have another problem.  I am able to start an x11 job using the command: `srun --pty --x11 bash` but no programs can connect to the X server.  In other words, I get "unable to connect to X server localhost:50.0".  From what I see in the logs, it looks like it is all working properly.  This is what I am seeing

[2018-01-19T15:07:24.924] [1686.extern] debug2: remote accepted auth methods: publickey,password
[2018-01-19T15:07:25.227] [1686.extern] debug:  public key auth successful
[2018-01-19T15:07:25.347] [1686.extern] debug2: x11_set_xauth: result from xauth: Using authority file /home/mjmjelde/.Xauthority
Writing authority file /home/mjmjelde/.Xauthority

[2018-01-19T15:07:25.347] [1686.extern] X11 forwarding established on DISPLAY=compute-01:50.0
[2018-01-19T15:07:25.347] [1686.extern] debug:  x11 forwarding - sending keepalive message
[2018-01-19T15:07:25.347] [1686.extern] debug:  x11 forwarding local display is 50
[2018-01-19T15:07:25.760] debug2: got this type of message 6001
[2018-01-19T15:07:25.760] debug2: Processing RPC: REQUEST_LAUNCH_TASKS
[2018-01-19T15:07:25.760] launch task 1686.0 request from 1569.1003 at 192.168.2.9 (port 41190)
[2018-01-19T15:07:25.760] debug:  Checking credential with 340 bytes of sig data
[2018-01-19T15:07:25.762] debug2: _group_cache_lookup_internal: found old entry for mjmjelde, looking up again
[2018-01-19T15:07:25.765] [1686.extern] debug:  Handling REQUEST_X11_DISPLAY
[2018-01-19T15:07:25.765] [1686.extern] debug:  Leaving _handle_get_x11_display
[2018-01-19T15:07:25.765] debug:  Leaving stepd_get_x11_display
[2018-01-19T15:07:25.765] debug2: _setup_x11_display: setting DISPLAY=localhost:50:0 for job 1686 step 0

Is there anything I am missing that I need to do to get x11 forwarding working?

Thanks,
Matthew

From: slurm-users [mailto:slurm-users-bounces at lists.schedmd.com] On Behalf Of Marcus Wagner
Sent: Monday, January 15, 2018 1:35 AM
To: slurm-users at lists.schedmd.com
Subject: Re: [slurm-users] Slurm 17.11 X11 support questions

Hi Matthew,

yes, I have.
I just needed to install libssh2-devel, then the native support will be built in:

$> ldd slurmstepd
        linux-vdso.so.1 =>  (0x00007fff4dbef000)
        libslurmfull.so => /opt/slurm/lib64/slurm/libslurmfull.so (0x00007f4fc4bd0000)
        libhwloc.so.5 => /usr/lib64/libhwloc.so.5 (0x00007f4fc4995000)
        libdl.so.2 => /usr/lib64/libdl.so.2 (0x00007f4fc4791000)
        libpam.so.0 => /usr/lib64/libpam.so.0 (0x00007f4fc4582000)
        libpam_misc.so.0 => /usr/lib64/libpam_misc.so.0 (0x00007f4fc437d000)
        libutil.so.1 => /usr/lib64/libutil.so.1 (0x00007f4fc417a000)
        libssh2.so.1 => /usr/lib64/libssh2.so.1 (0x00007f4fc3f50000)
        libpthread.so.0 => /usr/lib64/libpthread.so.0 (0x00007f4fc3d33000)
        libc.so.6 => /usr/lib64/libc.so.6 (0x00007f4fc3970000)
        libm.so.6 => /usr/lib64/libm.so.6 (0x00007f4fc366e000)
        libnuma.so.1 => /usr/lib64/libnuma.so.1 (0x00007f4fc3461000)
        libltdl.so.7 => /usr/lib64/libltdl.so.7 (0x00007f4fc3257000)
        /lib64/ld-linux-x86-64.so.2 (0x00005577dbb7f000)
        libaudit.so.1 => /usr/lib64/libaudit.so.1 (0x00007f4fc302f000)
        libssl.so.10 => /usr/lib64/libssl.so.10 (0x00007f4fc2dbc000)
        libcrypto.so.10 => /usr/lib64/libcrypto.so.10 (0x00007f4fc295b000)
        libz.so.1 => /usr/lib64/libz.so.1 (0x00007f4fc2745000)
        libgcc_s.so.1 => /usr/lib64/libgcc_s.so.1 (0x00007f4fc252e000)
        libcap-ng.so.0 => /usr/lib64/libcap-ng.so.0 (0x00007f4fc2328000)
        libgssapi_krb5.so.2 => /usr/lib64/libgssapi_krb5.so.2 (0x00007f4fc20db000)
        libkrb5.so.3 => /usr/lib64/libkrb5.so.3 (0x00007f4fc1df2000)
        libcom_err.so.2 => /usr/lib64/libcom_err.so.2 (0x00007f4fc1bee000)
        libk5crypto.so.3 => /usr/lib64/libk5crypto.so.3 (0x00007f4fc19bb000)
        libkrb5support.so.0 => /usr/lib64/libkrb5support.so.0 (0x00007f4fc17ac000)
        libkeyutils.so.1 => /usr/lib64/libkeyutils.so.1 (0x00007f4fc15a8000)
        libresolv.so.2 => /usr/lib64/libresolv.so.2 (0x00007f4fc138e000)
        libselinux.so.1 => /usr/lib64/libselinux.so.1 (0x00007f4fc1166000)
        libpcre.so.1 => /usr/lib64/libpcre.so.1 (0x00007f4fc0f04000)


Best
Marcus
On 01/13/2018 12:16 AM, Mjelde, Matthew J wrote:
Howdy,

I am trying to get my cluster's native X11 support enabled, but am having some difficulty.  I generated the RPMs for slurm, installed them on my systems, and added the "PrologFlags=X11" in the slurm.conf file as well.  However, when I start up slurmd with the flag added, I get this error:

Jan 12 16:23:52 node-01 slurmd[15904]: error: X11 forwarding not built in, cannot enable.
Jan 12 16:23:52 node-01 slurmd[15904]: fatal: PrologFlags invalid: X11

I believe I need to generate the RPMs with libssh2 support enabled, however I do not see any documentation or options available in the slurm.spec to do so.  Has anyone else been able to generate the RPMs for slurm 17.11 with X11 support enabled?

Thanks,
Matthew



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Marcus Wagner, Dipl.-Inf.



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