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Octopus Maintenance


Status of slurm

sinfo -R

we have draining nodes, but no jobs running on them

Reviving draining node (as root)

  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.

Some notes:

root@tux09:~# mkdir -p /var/lib/nfs/statd root@tux09:~# systemctl enable rpcbind Synchronizing state of rpcbind.service with SysV service script with /lib/systemd/systemd-sysv-install. Executing: /lib/systemd/systemd-sysv-install enable rpcbind root@tux09:~# systemctl list-unit-files | grep -E 'rpc-statd.service' rpc-statd.service static -

network-online.target x-systemd.device-timeout= /mnt/3T nfs nofail,x-systemd.automount,x-systemd.requires=network-online.target,x-systemd.device-timeout=10 0 0

(made with skribilo)