# d. Configure SLURM

On the login node:

1. Open the file /opt/flight/opt/slurm/etc/slurm.conf and add this information:

    ControlMachine=chead1
    SlurmUser=nobody
    SlurmctldPort=6827
    SlurmdPort=6828
    AuthType=auth/munge
    StateSaveLocation=/opt/flight/opt/slurm/var/spool/slurm.state
    SlurmdSpoolDir=/opt/flight/opt/slurm/var/spool/slurmd.spool
    SwitchType=switch/none
    MpiDefault=none
    SlurmctldPidFile=/opt/flight/opt/slurm/var/run/slurmctld.pid
    ClusterName=mycluster1
    SlurmdPidFile=/opt/flight/opt/slurm/var/run/slurmd.pid
    ProctrackType=proctrack/pgid
    ReturnToService=2
    SlurmctldTimeout=300
    SlurmdTimeout=300
    InactiveLimit=0
    MinJobAge=300
    KillWait=30
    Waittime=0
    SchedulerType=sched/backfill
    SelectType=select/cons_res
    SelectTypeParameters=CR_CORE_Memory
    SlurmctldDebug=3
    SlurmctldLogFile=/opt/flight/opt/slurm/var/log/slurmctld.log
    SlurmdDebug=3
    SlurmdLogFile=/opt/flight/opt/slurm/var/log/slurmd.log
    JobCompType=jobcomp/none
    NodeName=cnode[01-02]
    PartitionName=all Nodes=ALL Default=YES MaxTime=UNLIMITED                         

2. Create directories for SLURM.

    mkdir -p /opt/flight/opt/slurm/var/{log,run,spool/slurm.state}

3. Set the owner of the directories.

    chown -R nobody: /opt/flight/opt/slurm/var/{log,run,spool}

4. Generate a random 64 digit alphanumeric string to be used as a munge key.

    tr -dc A-Za-z0-9 </dev/urandom | head -c 64 ; echo ''

5. Copy the 64 digit code from the terminal, navigate to the file /etc/munge/munge.key, then paste it in.

6. Set the owner of the munge key.

    chown munge: /etc/munge/munge.key

7. Set permissions on the munge key.

    chmod 400 /etc/munge/munge.key

8. Start and enable munge and SLURM.

    systemctl start munge
    systemctl enable munge
    systemctl start flight-slurmctld
    systemctl enable flight-slurmctld

Now the SLURM server has been set up, the SLURM clients need to be set up on the other nodes.

On a compute node:

1. Take the contents of the file /opt/flight/opt/slurm/etc/slurm.conf on the head node and copy it to the same location on the current node.

2. Create new directories for SLURM:

    mkdir -p /opt/flight/opt/slurm/var/{log,run,spool}

3. Set the owner of the new directories:

    chown -R nobody: /opt/flight/opt/slurm/var/{log,run,spool}

4. Take the munge key from the file /etc/munge/munge.key on the head node and make a munge key in the same location on the current node.

5. Set the owner of the munge key:

    chown munge: /etc/munge/munge.key

6. Set permissions on the munge key.

    chmod 400 /etc/munge/munge.key

7. Start munge and SLURM:

    systemctl start munge
    systemctl enable munge
    systemctl start flight-slurmd
    systemctl enable flight-slurmd

Repeat these steps on every other compute node.