[slurm-users] SLURM slurmctld error on Ubuntu20.04 starting through systemctl

[Brian Andrus]

That is looking like your /run folder does not have world execute 
permissions, making it impossible for anything to access sub-directories.

Brian Andrus

On 3/17/2021 1:05 PM, Sven Duscha wrote:
> Hi,
>
> On 17.03.21 19:54, Brian Andrus wrote:
>> Be that as it may, you can see it is a permissions issue. Check
>> permissions on /run and ensure the slurmctld user is able to write there.
>>
>> You can either change the slurmctld user to one that can write there
>> or change the permissions on the directory to allow the slurmctld user
>> write access.
>
> That I already did as you can see from my analysis log.
>
>
> The default location is /run and that is of course only writable for
> root, as it also belongs only to root:root.
>
> I am reluctant of doing a chgrp slurm on that system directory.
> Furthermore, as the slurmctld is started in the context of user "slurm"
> I would expect the default location to be in a directory writable by
> user slurm.
>
> As I am issuing "systemctl start slurmctld" as root, the file is written
> by user root. The permissions were fine for that:
>
> ls -lthrd /run/slurm-lnll/
> drwxrwxr-x 2 root slurm 60 Mar 17 20:50 /run/slurm-lnll/
>
> Be it as it may, it is more suitable to let non-system services to write
> to subdirectories. Hence my creation of the directory /run/slurm-llnl.
>
>
> Even making the directory world-writable (chmod o+w) doesn't solve the
> issue.
>
> ls -lthrd /run/slurm-lnll/
>
> drwxrwxrwx 2 root slurm 40 Mar 17 18:50 /run/slurm-llnl
>
>
> So, even though the error message seems to be clear, pointing to a
> "permissions issue"; it is not clear from checking the relevant
> directories permissions.
>
> But I might be missing something obvious here. Rodrigo's suggestion to
> use /var/run/slurm-llnl works with "systemctl start slurmctld" for me,
> even though it has the same permissions:
>
> ls -lthrd /var/run/slurm-lnll/
> drwxrwxr-x 2 root slurm 60 Mar 17 20:50 /var/run/slurm-lnll/
>
>
> Best wishes,
>
>
> Sven
>
>