Re: [HTCondor-users] cgroup setup with centOS7/systemctl?

[Thomas Hartmann <thomas.hartmann@xxxxxxx>]

Hi Brian,

reading a bit into systemd's resource handling:
is there an argument against using the
  user.slice
instead of
  system.slice
? In a quick check I have not noticed differences.

Cheers,
  Thomas

On 2017-03-15 15:19, Brian Bockelman wrote:
> Hi Thomas,
> 
> I think this would now all go into site-local overrides for the HTCondor unit files.
> 
> If you find yourself doing anything cgconfig related, you're fighting a 100% losing battle as time goes forward.
> 
> Going off memory, I think you can simply set in the condor config:
> 
> BASE_CGROUP=/system.slice/condor.service
> 
> and you're done -- no other services to run.
> 
> If, for example, you want all of HTCondor to have a limit of 16GB of RAM, you would create the following directory (see https://www.freedesktop.org/software/systemd/man/systemd.unit.html):
> 
> /etc/systemd/system/condor.service.d
> 
> and then create a file /etc/systemd/system/condor.service.d/99_local.conf with the following contents:
> 
> [Service]
> MemoryLimit=16G
> 
> (see https://www.freedesktop.org/software/systemd/man/systemd.resource-control.html).
> 
> While this is indeed a new approach to learn, the upside is that this works across the entire range of system services -- and the config file format / rules is shared with huge swaths of the system!
> 
> Brian
> 
>> On Mar 13, 2017, at 4:51 AM, Thomas Hartmann <thomas.hartmann@xxxxxxx> wrote:
>>
>> Hi all,
>>
>> with /etc/cgconfig.conf being deprecated under CentOS7/systemctl, I
>> wonder if there is already a 'canonical' approach on how to setup/run
>> cgroup configs for Condor under systemctl?
>>
>> Would be creating an overall unit for condor (or setting resources via
>> systemctl set-property for condor.service) the way to go?
>> I suppose jobs will be in the condor.service cgroup - would additional
>> steps be necessary for setting any job resources (systemd-run?)?
>>
>> Cheers and thanks,
>>  Thomas
>>
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