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

[Thomas Hartmann <thomas.hartmann@xxxxxxx>]

systemd's handling of cgroups is confusing me a bit

As far as I can see, the default cgroup unit should evaluate
/etc/cgconfig.conf [1]. Since systemd seems to mount cgroup per default to
  /sys/fs/cgroup/
and I have not yet managed to convince it to mount it on
  /cgroup
instead (our path with SL6), I just ask for creating a htcondor group on
startup [2]. However, no htcondor cgroup gets available in
  /sys/fs/cgroup/cpu/
In principle it should work, Iguess - at least I can create it manually,
e.g.,
  cgcreate -a condor -g memory,cpu:htcondor
which should be equivalent to [2], or??

Cheers and thanks for ideas,
  Thomas

[1]
> /usr/lib/systemd/system/cgconfig.service
...
ExecStart=/usr/sbin/cgconfigparser -l /etc/cgconfig.conf -L
/etc/cgconfig.d -s 1664


[2]
> /etc/cgconfig.conf
group htcondor {
      cpu {}
      cpuacct {}
      memory {}
      freezer {}
      blkio {}
}


On 2017-03-13 10:51, Thomas Hartmann 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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