[Beowulf] head node abuse

[John Hearns]

https://bofhcam.org/co-larters/lart-reference/index.html

[image: image.png]

On Fri, 26 Mar 2021 at 13:57, Michael Di Domenico <mdidomenico4 at gmail.com>
wrote:

> does anyone have a recipe for limiting the damage people can do on
> login nodes on rhel7.  i want to limit the allocatable cpu/mem per
> user to some low value.  that way if someone kicks off a program but
> forgets to 'srun' it first, they get bound to a single core and don't
> bump anyone else.
>
> i've been poking around the net, but i can't find a solution, i don't
> understand what's being recommended, and/or i'm implementing the
> suggestions wrong.  i haven't been able to get them working.  the most
> succinct answer i found is that per user cgroup controls have been
> implemented in systemd v239/240, but since rhel7 is still on v219
> that's not going to help.  i also found some wonkiness that runs a
> program after a user logs in and hacks at the cgroup files directly,
> but i couldn't get that to work.
>
> supposedly you can override the user-{UID}.slice unit file and jam in
> the cgroup restrictions, but I have hundreds of users clearly that's
> not maintainable
>
> i'm sure others have already been down this road.  any suggestions?
> _______________________________________________
> Beowulf mailing list, Beowulf at beowulf.org sponsored by Penguin Computing
> To change your subscription (digest mode or unsubscribe) visit
> https://beowulf.org/cgi-bin/mailman/listinfo/beowulf
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://beowulf.org/pipermail/beowulf/attachments/20210326/3af65ce4/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 8229 bytes
Desc: not available
URL: <http://beowulf.org/pipermail/beowulf/attachments/20210326/3af65ce4/attachment.png>