[slurm-users] [External] Slurm Configuration assistance: Unable to use srun after installation (slurm on fedora 33)

Mon Apr 19 14:29:38 UTC 2021

You'll definitely need to get slurmd and slurmctld working before proceeding further. slurmctld is the Slurm controller mentioned when you do the srun.

Though there's probably some other steps you can take to make the slurmd and slurmctld system services available, it might be simpler to do the rpmbuild and rpm commands listed on https://slurm.schedmd.com/quickstart_admin.html , right below the instructions you were following. Those two commands will both run steps 3-8 of your original procedure, and will almost definitely put the systemd service files in the correct location.

From: slurm-users <slurm-users-bounces at lists.schedmd.com> on behalf of Johnsy K. John <johnsyjohnk at gmail.com>
Date: Monday, April 19, 2021 at 7:18 AM
To: Slurm User Community List <slurm-users at lists.schedmd.com>, fzillner at lenovo.com <fzillner at lenovo.com>, johnsy john <johnsyjohnk at gmail.com>
Subject: Re: [slurm-users] [External] Slurm Configuration assistance: Unable to use srun after installation (slurm on fedora 33)

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________________________________
Hi Florian,
Thanks for the valuable reply and help.

My answers to you are in green.

*  Do you have an active support contract with SchedMD? AFAIK they only offer paid support.
I don't have an active support contact. I just started learning slurm by installing it on my fedora machine. This is the first time I am installing and experimenting with slurm kind of software.

*  The error message is pretty straight forward, slurmctld is not running. Did you start it (systemctl start slurmctld)?
I did: systemctl start slurmctld and got this message: Failed to start slurmctld.service: Unit slurmctld.service not found.

*  slurmd needs to run on the node(s) you want to run on as well, and as I'm guessing you are using localhost for the controller and want to run jobs on localhost, so slurmctld and slurmd need to be running on localhost.
systemctl start slurmd
Failed to start slurmd.service: Unit slurmd.service not found.
Similar to slurmctrld

*  Is munge running?
Yes. Here is the status:
[johnsy at homepc ~]$ systemctl status munge
munge.service - MUNGE authentication service
     Loaded: loaded (/usr/lib/systemd/system/munge.service; enabled; vendor preset: disabled)
     Active: active (running) since Mon 2021-04-19 07:49:13 EDT; 13min ago <-- it is always enabled after restart. This log is just after a restart.
       Docs: man:munged(8)
    Process: 1070 ExecStart=/usr/sbin/munged (code=exited, status=0/SUCCESS)
   Main PID: 1072 (munged)
      Tasks: 4 (limit: 76969)
     Memory: 1.4M
        CPU: 8ms
     CGroup: /system.slice/munge.service
             └─1072 /usr/sbin/munged

*  May I ask why you're chown-ing pid and logfiles? The slurm user (typically "slurm") needs to have access to those files. Munge for instance checks for ownership and complains if something is not correct.
I tried to follow some instructions mentioned in: https://wiki.fysik.dtu.dk/niflheim/Slurm_configuration#copy-slurm-conf-to-all-nodes<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwiki.fysik.dtu.dk%2Fniflheim%2FSlurm_configuration%23copy-slurm-conf-to-all-nodes&data=04%7C01%7Crenfro%40tntech.edu%7C9d875b30a7044047988908d9032d445f%7C66fecaf83dc04d2cb8b8eff0ddea46f0%7C1%7C0%7C637544315232638295%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=OJtvIS06Pv9e4Tm82hEmXsCUuU1AZST514BzVC0v4Ow%3D&reserved=0>
I thought, as I am installing the slurm as root, the user "johnsy" has to have ownership permissions.

*  "srun /proc/cpuinfo" will fail, even if slurmctld and slurmd are running, because /proc/cpuinfo is not an executable file. You may want to insert "cat" after srun. Another simple test would be "srun hostname"
I tried : srun hostname and got the following error message:
srun: error: Unable to allocate resources: Unable to contact slurm controller (connect failure)

Also tried:
systemctl status slurmctld
Unit slurmctld.service could not be found.

Also I tried installing the packaged version: https://src.fedoraproject.org/rpms/slurm<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsrc.fedoraproject.org%2Frpms%2Fslurm&data=04%7C01%7Crenfro%40tntech.edu%7C9d875b30a7044047988908d9032d445f%7C66fecaf83dc04d2cb8b8eff0ddea46f0%7C1%7C0%7C637544315232638295%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=auUUKxDzWs0jRBzxT6ZF7HqYfXqsPJPejqxp0o95Zjo%3D&reserved=0> using dnf.
The same problem exists.

Any help in this regard will be appreciated.

Thanks a lot.
Johnsy

On Mon, Apr 19, 2021 at 5:04 AM Florian Zillner <fzillner at lenovo.com<mailto:fzillner at lenovo.com>> wrote:
Hi Johnsy,

  1.  Do you have an active support contract with SchedMD? AFAIK they only offer paid support.
  2.  The error message is pretty straight forward, slurmctld is not running. Did you start it (systemctl start slurmctld)?
  3.  slurmd needs to run on the node(s) you want to run on as well, and as I'm guessing you are using localhost for the controller and want to run jobs on localhost, so slurmctld and slurmd need to be running on localhost.
  4.  Is munge running?
  5.  May I ask why you're chown-ing pid and logfiles? The slurm user (typically "slurm") needs to have access to those files. Munge for instance checks for ownership and complains if something is not correct.
  6.  "srun /proc/cpuinfo" will fail, even if slurmctld and slurmd are running, because /proc/cpuinfo is not an executable file. You may want to insert "cat" after srun. Another simple test would be "srun hostname"
And, just my personal opinion, if this is your first experiment with Slurm, I wouldn't change too much right from the beginning but instead get it working first and then change things to your needs. Slurm is also available in the EPEL repos, so you could install it using dnf and experiment with the packaged version.

Hope this helps,
Florian

________________________________
From: slurm-users <slurm-users-bounces at lists.schedmd.com<mailto:slurm-users-bounces at lists.schedmd.com>> on behalf of Johnsy K. John <johnsyjohnk at gmail.com<mailto:johnsyjohnk at gmail.com>>
Sent: Monday, 19 April 2021 01:43
To: sales at schedmd.com<mailto:sales at schedmd.com> <sales at schedmd.com<mailto:sales at schedmd.com>>; johnsy john <johnsyjohnk at gmail.com<mailto:johnsyjohnk at gmail.com>>; slurm-users at schedmd.com<mailto:slurm-users at schedmd.com> <slurm-users at schedmd.com<mailto:slurm-users at schedmd.com>>
Subject: [External] [slurm-users] Slurm Configuration assistance: Unable to use srun after installation (slurm on fedora 33)

Hello SchedMD team,

I would like to use your slurm workload manager for learning purposes.
And I tried installing the the software (downloaded from: https://www.schedmd.com/downloads.php<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.schedmd.com%2Fdownloads.php&data=04%7C01%7Crenfro%40tntech.edu%7C9d875b30a7044047988908d9032d445f%7C66fecaf83dc04d2cb8b8eff0ddea46f0%7C1%7C0%7C637544315232648285%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=a0ee7s8xGUe5gt%2FbCLCHmX5iNxaaVnWFLYTB08pPXe0%3D&reserved=0> ) and followed the steps as mentioned in:

https://slurm.schedmd.com/download.html<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fslurm.schedmd.com%2Fdownload.html&data=04%7C01%7Crenfro%40tntech.edu%7C9d875b30a7044047988908d9032d445f%7C66fecaf83dc04d2cb8b8eff0ddea46f0%7C1%7C0%7C637544315232648285%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=r10%2FeoMm6LMp86E9suKr3CoabGhWK1IKgbhnqBtkkhg%3D&reserved=0>
https://slurm.schedmd.com/quickstart_admin.html<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fslurm.schedmd.com%2Fquickstart_admin.html&data=04%7C01%7Crenfro%40tntech.edu%7C9d875b30a7044047988908d9032d445f%7C66fecaf83dc04d2cb8b8eff0ddea46f0%7C1%7C0%7C637544315232658280%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=AjAKtmAgQekrMLhiQMu2hV9mR9n19ZDUWJhwcb%2F9Hnw%3D&reserved=0>

My Linux OS is fedora 33, and i tried installing it as root login.
After installation and configuration as mentioned in page: https://slurm.schedmd.com/quickstart_admin.html<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fslurm.schedmd.com%2Fquickstart_admin.html&data=04%7C01%7Crenfro%40tntech.edu%7C9d875b30a7044047988908d9032d445f%7C66fecaf83dc04d2cb8b8eff0ddea46f0%7C1%7C0%7C637544315232658280%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=AjAKtmAgQekrMLhiQMu2hV9mR9n19ZDUWJhwcb%2F9Hnw%3D&reserved=0>
I got some errors when I tried to do srun.
Details about the installation and use are as follows:

Using root permissions, copied to: /root/installations/

cd /root/installations/

tar --bzip -x -f slurm-20.11.5.tar.bz2

cd slurm-20.11.5/

./configure --enable-debug --prefix=/usr/local --sysconfdir=/usr/local/etc

make
make install

Following steps are based on https://wiki.fysik.dtu.dk/niflheim/Slurm_configuration<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwiki.fysik.dtu.dk%2Fniflheim%2FSlurm_configuration&data=04%7C01%7Crenfro%40tntech.edu%7C9d875b30a7044047988908d9032d445f%7C66fecaf83dc04d2cb8b8eff0ddea46f0%7C1%7C0%7C637544315232668271%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=L6FrrioLgjPEB66IKhBRK00zLFJ9cT3YP5h1yli997U%3D&reserved=0>
mkdir /var/spool/slurmctld /var/log/slurm
chown johnsy /var/spool/slurmctld
chown johnsy /var/log/slurm
chmod 755 /var/spool/slurmctld /var/log/slurm

 cp /var/run/slurmctld.pid /var/run/slurmd.pid

touch /var/log/slurm/slurmctld.log
chown johnsy /var/log/slurm/slurmctld.log

touch /var/log/slurm/slurm_jobacct.log /var/log/slurm/slurm_jobcomp.log
chown johnsy /var/log/slurm/slurm_jobacct.log /var/log/slurm/slurm_jobcomp.log

ldconfig -n /usr/lib64

Now when I tried an example command for trial:

srun /proc/cpuinfo

I get the following error:

srun: error: Unable to allocate resources: Unable to contact slurm controller (connect failure)

My configuration file slurm.conf f that i created is:
######################################################################################################
######################################################################################################
# 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.
#
SlurmctldHost=homepc
#SlurmctldHost=
#
#DisableRootJobs=NO
#EnforcePartLimits=NO
#Epilog=
#EpilogSlurmctld=
#FirstJobId=1
#MaxJobId=999999
#GresTypes=
#GroupUpdateForce=0
#GroupUpdateTime=600
#JobFileAppend=0
#JobRequeue=1
#JobSubmitPlugins=1
#KillOnBadExit=0
#LaunchType=launch/slurm
#Licenses=foo*4,bar
#MailProg=/bin/mail
#MaxJobCount=5000
#MaxStepCount=40000
#MaxTasksPerNode=128
MpiDefault=none
#MpiParams=ports=#-#
#PluginDir=
#PlugStackConfig=
#PrivateData=jobs
ProctrackType=proctrack/cgroup
#Prolog=
#PrologFlags=
#PrologSlurmctld=
#PropagatePrioProcess=0
#PropagateResourceLimits=
#PropagateResourceLimitsExcept=
#RebootProgram=
ReturnToService=1
SlurmctldPidFile=/var/run/slurmctld.pid
SlurmctldPort=6817
SlurmdPidFile=/var/run/slurmd.pid
SlurmdPort=6818
SlurmdSpoolDir=/var/spool/slurmd
SlurmUser=johnsy
#SlurmdUser=root
#SrunEpilog=
#SrunProlog=
StateSaveLocation=/var/spool
SwitchType=switch/none
#TaskEpilog=
TaskPlugin=task/affinity
#TaskProlog=
#TopologyPlugin=topology/tree
#TmpFS=/tmp
#TrackWCKey=no
#TreeWidth=
#UnkillableStepProgram=
#UsePAM=0
#
#
# TIMERS
#BatchStartTimeout=10
#CompleteWait=0
#EpilogMsgTime=2000
#GetEnvTimeout=2
#HealthCheckInterval=0
#HealthCheckProgram=
InactiveLimit=0
KillWait=30
#MessageTimeout=10
#ResvOverRun=0
MinJobAge=300
#OverTimeLimit=0
SlurmctldTimeout=120
SlurmdTimeout=300
#UnkillableStepTimeout=60
#VSizeFactor=0
Waittime=0
#
#
# SCHEDULING
#DefMemPerCPU=0
#MaxMemPerCPU=0
#SchedulerTimeSlice=30
SchedulerType=sched/backfill
SelectType=select/cons_tres
SelectTypeParameters=CR_Core
#
#
# JOB PRIORITY
#PriorityFlags=
#PriorityType=priority/basic
#PriorityDecayHalfLife=
#PriorityCalcPeriod=
#PriorityFavorSmall=
#PriorityMaxAge=
#PriorityUsageResetPeriod=
#PriorityWeightAge=
#PriorityWeightFairshare=
#PriorityWeightJobSize=
#PriorityWeightPartition=
#PriorityWeightQOS=
#
#
# LOGGING AND ACCOUNTING
#AccountingStorageEnforce=0
#AccountingStorageHost=
#AccountingStoragePass=
#AccountingStoragePort=
AccountingStorageType=accounting_storage/none
#AccountingStorageUser=
AccountingStoreJobComment=YES
ClusterName=cluster
#DebugFlags=
#JobCompHost=
#JobCompLoc=
#JobCompPass=
#JobCompPort=
JobCompType=jobcomp/none
#JobCompUser=
#JobContainerType=job_container/none
JobAcctGatherFrequency=30
JobAcctGatherType=jobacct_gather/none
SlurmctldDebug=info
#SlurmctldLogFile=
SlurmdDebug=info
#SlurmdLogFile=
#SlurmSchedLogFile=
#SlurmSchedLogLevel=
#
#
# POWER SAVE SUPPORT FOR IDLE NODES (optional)
#SuspendProgram=
#ResumeProgram=
#SuspendTimeout=
#ResumeTimeout=
#ResumeRate=
#SuspendExcNodes=
#SuspendExcParts=
#SuspendRate=
#SuspendTime=
#
#
# COMPUTE NODES
NodeName=localhost CPUs=12 Sockets=1 CoresPerSocket=6 ThreadsPerCore=2 State=UNKNOWN
PartitionName=debug Nodes=localhost Default=YES MaxTime=INFINITE State=UP
######################################################################################################
######################################################################################################
######################################################################################################
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