On Sat, Dec 24, 2016 at 05:14:44PM +0100, Guido Günther wrote:
Hi Cedric,x
On Wed, Dec 21, 2016 at 02:36:39PM +0100, Cedric Bosdonnat wrote:
> Hey Christian,
>
> On Tue, 2016-12-20 at 12:29 +0100, Christian Ehrhardt wrote:
> > Hi,
> > I found an issue in libvirt related to libvirt-lxc, but fail to find the root
cause.
> >
> > The TL;DR is: libvirt-lxc guests get killed on libvirt restart due to
"internal error: No valid cgroup for machine"
> >
> > It was able to reproduce libvirt 1.3.1, 2.4 and 2.5 as packages in Ubuntu and
Debian.
> > I wanted to ask for two things:
> > - wider coverage where this does reproduce
>
> I couldn't reproduce here with openSUSE Tumbleweed and libvirt 2.5 packages.
I had a short look and it seems like this sequence is killing all running
libvirt-lxc guests reliably:
# no lxc guest running yet
export LIBVIRT_DEFAULT_URI=lxc:///
DOMAIN=sl
systemctl daemon-reload
# start lxc guest
virsh start ${DOMAIN}
sleep 1 # give vm some time to start
systemctl restart libvirtd
Using ftrae I can see that systemd moves the process into the wrong
cgroup on start:
systemd-1 [000] .... 652.333068: cgroup_attach_task: dst_root=3 dst_id=80
dst_level=2 dst_path=/system.slice/libvirtd.service pid=4073 comm=libvirt_lxc
systemd-1 [000] .... 652.333117: cgroup_attach_task: dst_root=3 dst_id=80
dst_level=2 dst_path=/system.slice/libvirtd.service pid=4073 comm=libvirt_lxc
systemd-1 [000] .... 652.333160: cgroup_attach_task: dst_root=6 dst_id=80
dst_level=2 dst_path=/system.slice/libvirtd.service pid=4073 comm=libvirt_lxc
systemd-1 [000] .... 652.333203: cgroup_attach_task: dst_root=4 dst_id=107
dst_level=2 dst_path=/system.slice/libvirtd.service pid=4073 comm=libvirt_lxc
systemd-1 [000] .... 652.333245: cgroup_attach_task: dst_root=8 dst_id=80
dst_level=2 dst_path=/system.slice/libvirtd.service pid=4073 comm=libvirt_lxc
systemd-1 [000] .... 652.333286: cgroup_attach_task: dst_root=7 dst_id=84
dst_level=2 dst_path=/system.slice/libvirtd.service pid=4073 comm=libvirt_lxc
I've attached the script to reproduce this and would be happy about
ideas of the root cause.
Cheers,
-- Guido