[slurm-users] Configuration issue on Ubuntu

[Gennaro Oliva]

Hi Chris,

On Wed, Aug 29, 2018 at 07:04:27AM +1000, Chris Samuel wrote:
> On Tuesday, 28 August 2018 11:43:54 PM AEST Umut Arus wrote:
> 
> > It seems the main problem is; slurmctld: fatal: No front end nodes defined
> 
> Frontend nodes are for IBM BlueGene and Cray systems where you cannot run 
> slurmd on the compute nodes themselves so a proxy system must be used instead 
> (at $JOB-1 we used this on our BG/Q system).  I strongly suspect you are not 
> running on either of those!

The option --enable-front-end to configure is also needed to emulate
really large cluster:

https://slurm.schedmd.com/faq.html#multi_slurmd

> If you built Slurm yourself you'll need to check you didn't use those 
> arguments by mistake or configure didn't enable them in error, and if this is 
> an Ubuntu package then it's probably an bug in how they packaged it!

This option is enabled only in the slurmctld daemon that is contained in
the slurm-wlm-emulator package that is not intended to be used for batch
jobs.

vagrant at ubuntu-bionic:~$ grep 'No front end nodes defined' /usr/sbin/slurmctld-wlm-emulator
Binary file /usr/sbin/slurmctld-wlm-emulator matches
vagrant at ubuntu-bionic:~$ grep 'No front end nodes defined' /usr/sbin/slurmctld-wlm
vagrant at ubuntu-bionic:~$

It can be possible that Umut installed slurm-wlm-emulator package
together with the regular package and the emulated daemon was picked by
the alternatives system.

Best regards,
-- 
Gennaro Oliva