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Octopus Maintenance

Slurm

Status of slurm

sinfo
sinfo -R
squeue

we have draining nodes, but no jobs running on them

Reviving draining node (as root)

scontrol
  update NodeName=octopus05 State=DOWN Reason="undraining"
  update NodeName=octopus05 State=RESUME
  show node octopus05

Kill time can lead to drain state

scontrol show config | grep kill
UnkillableStepProgram   = (null)
UnkillableStepTimeout   = 60 sec

check valid configuration with `slurmd -C` and update nodes with

scontrol reconfigure

Password management

So we create a script that can deploy files from octopus01 (head node). Unfortunately ids in passwd do no match, so we can't copy those yet.

See /etc/nodes for script and ssh files, sudoers (etc)

Basically the root user can copy across.

Execute binaries on mounted devices

To avoid `./scratch/script.sh: Permission denied` on `device_file`:

- `sudo bash`

- `ls /scratch -l` to check where `/scratch` is

- `vim /etc/fstab`

- replace `noexec` with `exec` for `device_file`

- `mount -o remount [device_file]` to remount the partition with its new configuration.