On Tue, Mar 04, 2014 at 05:16:42PM +0100, Dariusz Michaluk wrote: > On 03.03.2014 16:26, Daniel P. Berrange wrote: > > >That looks really bizarre. The same two directory names nested over > >and over again. I can't reproduce this kind of thing on my own host. > >Libvirt only ever creates the first two levels as expected > > > >/sys/fs/cgroup/systemd/machine.slice > >/sys/fs/cgroup/systemd/machine.slice/machine-lxc\x2dmycontainer.scope > > > >The fact that the libvirt_lxc process itself ends up in the right > >place suggest that this isn't libvirt, but rather something else > >is creating these extra levels and moving systemd into them. > > On arch linux mailing lists I found similar things: > https://mailman.archlinux.org/pipermail/arch-general/2014-February/035077.html > Behavior can be reproduced. After re-taking a look at the topic, it > seems to me that the cause of the problem is the behavior of > systemd. > Systemd create first level > (machine.slice/machine-lxc\x2dmycontainer.scope) during > /usr/lib/systemd/systemd execution, and the second level during > /usr/lib/systemd/systemd --user execution. > > #cat /proc/1/cgroup > 2:name=systemd:/machine.slice/machine-lxc\x2dmycontainer.scope/machine.slice/machine-lxc\x2dmycontainer.scope > > #cat /proc/28/cgroup > 2:name=systemd:/machine.slice/machine-lxc\x2dmycontainer.scope/machine.slice/machine-lxc\x2dmycontainer.scope/machine.slice/machine-lxc\x2dmycontainer.scope/user.slice/user-0.slice/user@0.service > > Maybe the problem is that the libvirt itself creates machine.slice / > machine-lxc \ x2dmycontainer.scope > According to: > http://www.freedesktop.org/wiki/Software/systemd/ContainerInterface/ > "Container managers should stay away from the "name=systemd" cgroup > hierarchy. That's private property of systemd, and no other code > should interfere with it. " Libvirt honours that actually. When starting a guest it invokes a DBus API call to systemd-machined, which talks to systemd to create the cgroups. Libvirt isn't actually creating these in the filesystem itself. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
