Open Stack

After installing some systemd package, and starting up machine.slice,
systemd-machined, and hard rebooting the vm from openstack side, I
could now see the VM showing up under machine.slice. all vms were
showing up under libvirtd.service, which is under system.slice.

What are the benefits of running libvirt managed guest instances under
machine.slice?

On Wed, Jul 20, 2022 at 5:53 PM Clark Boylan <cboylan at sapwetik.org> wrote:
>
> On Wed, Jul 20, 2022, at 3:17 PM, hai wu wrote:
> > Is there any configuration file that is needed to ensure guest domains
> > are under systemd machine.slice? not seeing anything under
> > machine.slice ..
>
> I think that https://www.freedesktop.org/software/systemd/man/systemd.slice.html and https://libvirt.org/cgroups.html covers this for libvirt managed VMs.
>
> >
> > On Wed, Jul 20, 2022 at 3:33 PM Dmitriy Rabotyagov
> > <noonedeadpunk at gmail.com> wrote:
> >>
> >> I believe you can decrease OOMScoreAdjust for systemd machines.slice, under which guest domains are to reduce chances of oom killing them.
> >>
> >> ср, 20 июл. 2022 г., 21:52 hai wu <haiwu.us at gmail.com>:
> >>>
> >>> nova hypervisor sometimes oom would kill some openstack guests.
> >>>
> >>> Is it possible to not allow kernel to oom kill any openstack guests?
> >>> ram is not oversubscribed much ..
> >>>
>