Comment # 1 on bug 1183247 from Stefan Eisenwiener

I have made some tests with other openSUSE distributions.
For testing I installed a minimal Server setup, and added libvird with lxc
driver.
> zypper in -y --no-recommends libvirt-daemon-lxc libvirt-client libvirt-admin libvirt-daemon-config-network libvirt-daemon-config-nwfilter

This was tested with a also minimal lxc container setup
<domain type='lxc'>
  <name>vm1</name>
  <memory>500000</memory>
  <os>
    <type>exe</type>
    <init>/bin/sh</init>
  </os>
  <vcpu>1</vcpu>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/libvirt_lxc</emulator>
    <interface type='network'>
      <source network='default'/>
    </interface>
    <console type='pty' />
  </devices>
</domain>

The results are as follows
openSUSE-42.3       | WORKING
openSUSE-15.1       | WORKING
openSUSE-15.2       | WORKING
openSUSE-tumbleweed | failed with NoMachineForPID Error

I think there are some access rights missing or incorrect, but I can't find the
root cause, because I'm not that firmiliar with the libvirt, and/or systemd
internal workings.