# 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.

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