[slurm-users] Help debugging Slurm configuration
Jeffrey Layton
laytonjb at gmail.com
Thu Dec 8 20:06:40 UTC 2022
localhost is the ctrl name :)
I can change it though if needed (I was lazy when I did the initial
installation).
Thanks!
Jeff
On Thu, Dec 8, 2022 at 2:30 PM Glen MacLachlan <maclach at gwu.edu> wrote:
> One other thing to address is that SlurmctldHost should point to the
> controller node where slurmctld is running, the name of which I would
> expect Warewulf would put into /etc/hosts.
> https://slurm.schedmd.com/slurm.conf.html#OPT_SlurmctldHost
>
> Kind Regards,
> Glen
>
> ==========================================
> Glen MacLachlan, PhD
> *Lead High Performance Computing Engineer *
>
> Research Technology Services
> The George Washington University
> 44983 Knoll Square
> Enterprise Hall, 328L
> Ashburn, VA 20147
>
> ==========================================
>
>
>
>
>
>
>
> On Thu, Dec 8, 2022 at 1:58 PM Glen MacLachlan <maclach at gwu.edu> wrote:
>
>>
>> What does running this on the compute node show? (looks at journal log
>> for past 12 hours)
>> journalctl -S -12h -o verbose | grep slurm
>>
>>
>> You may want to increase your debug verbosity to debug5
>> https://slurm.schedmd.com/slurm.conf.html#OPT_SlurmdDebug while tracking
>> down this issue.
>> For reference, see
>> https://slurm.schedmd.com/slurm.conf.html#OPT_SlurmdDebug
>>
>> You should also address this error to fix logging:
>> [2022-12-08T13:12:17.343] error: chdir(/var/log): Permission denied
>>
>> by making a directory /var/log/slurm and making the slurm user the owner
>> on both the controller and compute node. Then update your slurm.conf file
>> like this:
>> # LOGGING
>> SlurmctldLogFile=/var/log/slurm/slurmctld.log
>> SlurmdLogFile=/var/log/slurm/slurmd.log
>>
>> and then running 'scontrol reconfigure'
>>
>> Kind Regards,
>> Glen
>>
>> ==========================================
>> Glen MacLachlan, PhD
>> *Lead High Performance Computing Engineer *
>>
>> Research Technology Services
>> The George Washington University
>> 44983 Knoll Square
>> Enterprise Hall, 328L
>> Ashburn, VA 20147
>>
>> ==========================================
>>
>>
>>
>>
>>
>>
>>
>> On Thu, Dec 8, 2022 at 1:41 PM Jeffrey Layton <laytonjb at gmail.com> wrote:
>>
>>> Good afternoon,
>>>
>>> I have a very simple two node cluster using Warewulf 4.3. I was
>>> following some instructions on how to install the OpenHPC Slurm binaries
>>> (server and client). I booted the compute node and the Slurm Server says
>>> it's in an unknown state. This hasn't happened to me before but I would
>>> like to debug the problem.
>>>
>>> I checked the services on the S:urm server (head node)
>>>
>>> $ systemctl status munge
>>> ● munge.service - MUNGE authentication service
>>> Loaded: loaded (/usr/lib/systemd/system/munge.service; enabled;
>>> vendor preset: disabled)
>>> Active: active (running) since Thu 2022-12-08 13:12:10 EST; 4min 42s
>>> ago
>>> Docs: man:munged(8)
>>> Process: 1140 ExecStart=/usr/sbin/munged (code=exited,
>>> status=0/SUCCESS)
>>> Main PID: 1182 (munged)
>>> Tasks: 4 (limit: 48440)
>>> Memory: 1.2M
>>> CGroup: /system.slice/munge.service
>>> └─1182 /usr/sbin/munged
>>>
>>> Dec 08 13:12:10 localhost.localdomain systemd[1]: Starting MUNGE
>>> authentication service...
>>> Dec 08 13:12:10 localhost.localdomain systemd[1]: Started MUNGE
>>> authentication service.
>>>
>>> $ systemctl status slurmctld
>>> ● slurmctld.service - Slurm controller daemon
>>> Loaded: loaded (/usr/lib/systemd/system/slurmctld.service; enabled;
>>> vendor preset: disabled)
>>> Active: active (running) since Thu 2022-12-08 13:12:17 EST; 4min 56s
>>> ago
>>> Main PID: 1518 (slurmctld)
>>> Tasks: 10
>>> Memory: 23.0M
>>> CGroup: /system.slice/slurmctld.service
>>> ├─1518 /usr/sbin/slurmctld -D -s
>>> └─1555 slurmctld: slurmscriptd
>>>
>>> Dec 08 13:12:17 localhost.localdomain systemd[1]: Started Slurm
>>> controller daemon.
>>> Dec 08 13:12:17 localhost.localdomain slurmctld[1518]: slurmctld: No
>>> parameter for mcs plugin, de>
>>> Dec 08 13:12:17 localhost.localdomain slurmctld[1518]: slurmctld: mcs:
>>> MCSParameters = (null). on>
>>> Dec 08 13:13:17 localhost.localdomain slurmctld[1518]: slurmctld:
>>> SchedulerParameters=default_que>
>>>
>>>
>>>
>>> I then booted the compute node and checked the services there:
>>>
>>> systemctl status munge
>>> ● munge.service - MUNGE authentication service
>>> Loaded: loaded (/usr/lib/systemd/system/munge.service; enabled;
>>> vendor preset: disabled)
>>> Active: active (running) since Thu 2022-12-08 18:14:53 UTC; 3min 24s
>>> ago
>>> Docs: man:munged(8)
>>> Process: 786 ExecStart=/usr/sbin/munged (code=exited, status=0/SUCCESS)
>>> Main PID: 804 (munged)
>>> Tasks: 4 (limit: 26213)
>>> Memory: 940.0K
>>> CGroup: /system.slice/munge.service
>>> └─804 /usr/sbin/munged
>>>
>>> Dec 08 18:14:53 n0001 systemd[1]: Starting MUNGE authentication
>>> service...
>>> Dec 08 18:14:53 n0001 systemd[1]: Started MUNGE authentication service.
>>>
>>> systemctl status slurmd
>>> ● slurmd.service - Slurm node daemon
>>> Loaded: loaded (/usr/lib/systemd/system/slurmd.service; enabled;
>>> vendor preset: disabled)
>>> Active: failed (Result: exit-code) since Thu 2022-12-08 18:15:53 UTC;
>>> 2min 40s ago
>>> Process: 897 ExecStart=/usr/sbin/slurmd -D -s $SLURMD_OPTIONS
>>> (code=exited, status=1/FAILURE)
>>> Main PID: 897 (code=exited, status=1/FAILURE)
>>>
>>> Dec 08 18:15:44 n0001 systemd[1]: Started Slurm node daemon.
>>> Dec 08 18:15:53 n0001 systemd[1]: slurmd.service: Main process exited,
>>> code=exited, status=1/FAIL>
>>> Dec 08 18:15:53 n0001 systemd[1]: slurmd.service: Failed with result
>>> 'exit-code'.
>>>
>>> # systemctl status slurmd
>>> ● slurmd.service - Slurm node daemon
>>> Loaded: loaded (/usr/lib/systemd/system/slurmd.service; enabled;
>>> vendor preset: disabled)
>>> Active: active (running) since Thu 2022-12-08 18:19:04 UTC; 5s ago
>>> Main PID: 996 (slurmd)
>>> Tasks: 2
>>> Memory: 1012.0K
>>> CGroup: /system.slice/slurmd.service
>>> ├─996 /usr/sbin/slurmd -D -s --conf-server localhost
>>> └─997 /usr/sbin/slurmd -D -s --conf-server localhost
>>>
>>> Dec 08 18:19:04 n0001 systemd[1]: Started Slurm node daemon.
>>>
>>>
>>>
>>>
>>> On the SLurm server I checked the queue and "sinfo -a" and found the
>>> following:
>>>
>>> $ squeue
>>> JOBID PARTITION NAME USER ST TIME NODES
>>> NODELIST(REASON)
>>> $ sinfo -a
>>> PARTITION AVAIL TIMELIMIT NODES STATE NODELIST
>>> normal* up 1-00:00:00 1 unk* n0001
>>>
>>>
>>> After a few moments (less than a minute - maybe 20-30 seconds, slurmd on
>>> the compute node fails. WHen I checked the service I saw this:
>>>
>>> $ systemctl status slurmd
>>> ● slurmd.service - Slurm node daemon
>>> Loaded: loaded (/usr/lib/systemd/system/slurmd.service; enabled;
>>> vendor preset: disabled)
>>> Active: failed (Result: exit-code) since Thu 2022-12-08 18:19:13 UTC;
>>> 10min ago
>>> Process: 996 ExecStart=/usr/sbin/slurmd -D -s $SLURMD_OPTIONS
>>> (code=exited, status=1/FAILURE)
>>> Main PID: 996 (code=exited, status=1/FAILURE)
>>>
>>> Dec 08 18:19:04 n0001 systemd[1]: Started Slurm node daemon.
>>> Dec 08 18:19:13 n0001 systemd[1]: slurmd.service: Main process exited,
>>> code=exited, status=1/FAIL>
>>> Dec 08 18:19:13 n0001 systemd[1]: slurmd.service: Failed with result
>>> 'exit-code'.
>>>
>>>
>>> Below are the logs for the slurm server for today (I rebooted the
>>> compute twice)
>>>
>>> [2022-12-08T13:12:17.343] error: chdir(/var/log): Permission denied
>>> [2022-12-08T13:12:17.343] error: Configured MailProg is invalid
>>> [2022-12-08T13:12:17.347] slurmctld version 22.05.2 started on cluster
>>> cluster
>>> [2022-12-08T13:12:17.371] No memory enforcing mechanism configured.
>>> [2022-12-08T13:12:17.374] Recovered state of 1 nodes
>>> [2022-12-08T13:12:17.374] Recovered JobId=3 Assoc=0
>>> [2022-12-08T13:12:17.374] Recovered JobId=4 Assoc=0
>>> [2022-12-08T13:12:17.374] Recovered information about 2 jobs
>>> [2022-12-08T13:12:17.375] select/cons_tres: part_data_create_array:
>>> select/cons_tres: preparing for 1 partitions
>>> [2022-12-08T13:12:17.375] Recovered state of 0 reservations
>>> [2022-12-08T13:12:17.375] read_slurm_conf: backup_controller not
>>> specified
>>> [2022-12-08T13:12:17.376] select/cons_tres: select_p_reconfigure:
>>> select/cons_tres: reconfigure
>>> [2022-12-08T13:12:17.376] select/cons_tres: part_data_create_array:
>>> select/cons_tres: preparing for 1 partitions
>>> [2022-12-08T13:12:17.376] Running as primary controller
>>> [2022-12-08T13:12:17.376] No parameter for mcs plugin, default values set
>>> [2022-12-08T13:12:17.376] mcs: MCSParameters = (null). ondemand set.
>>> [2022-12-08T13:13:17.471]
>>> SchedulerParameters=default_queue_depth=100,max_rpc_cnt=0,max_sched_time=2,partition_job_depth=0,sched_max_job_start=0,sched_min_interval=2
>>> [2022-12-08T13:17:17.940] error: Nodes n0001 not responding
>>> [2022-12-08T13:22:17.533] error: Nodes n0001 not responding
>>> [2022-12-08T13:27:17.048] error: Nodes n0001 not responding
>>>
>>> There are no logs on the compute node.
>>>
>>> Any suggestions where to start looking? I think I'm seeing the trees and
>>> not the forest :)
>>>
>>> Thanks!
>>>
>>> Jeff
>>>
>>> P.S Here's some relevant features from the server slurm.conf
>>>
>>>
>>> # slurm.conf file generated by configurator.html.
>>> # Put this file on all nodes of your cluster.
>>> # See the slurm.conf man page for more information.
>>> #
>>> ClusterName=cluster
>>> SlurmctldHost=localhost
>>> #SlurmctldHost=
>>> ...
>>> # slurm.conf file generated by configurator.html.
>>> # Put this file on all nodes of your cluster.
>>> # See the slurm.conf man page for more information.
>>> #
>>> ClusterName=cluster
>>> SlurmctldHost=localhost
>>> #SlurmctldHost=
>>>
>>>
>>>
>>>
>>> Here's some relevant parts of slurm.conf on the client node:
>>>
>>>
>>>
>>>
>>> # slurm.conf file generated by configurator.html.
>>> # Put this file on all nodes of your cluster.
>>> # See the slurm.conf man page for more information.
>>> #
>>> ClusterName=cluster
>>> SlurmctldHost=localhost
>>> #SlurmctldHost=
>>> ...
>>> # slurm.conf file generated by configurator.html.
>>> # Put this file on all nodes of your cluster.
>>> # See the slurm.conf man page for more information.
>>> #
>>> ClusterName=cluster
>>> SlurmctldHost=localhost
>>> #SlurmctldHost=
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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