[Lxc-users] Container failed, can't remove cgroup

[Serge Hallyn]

Quoting Lars Kellogg-Stedman (lars at oddbit.com):
> > No idea about the systemd aspects, but the best way to get those cgroups
> > to be autoremoved is using a release_agent.  See
> > Documentation/cgroups/cgroups.txt in the kernel source.
> 
> Serge,
> 
> Thanks for the pointer.  That does seem like the right direction,
> although it looks like this cgroup hierarchy already has a release
> agent defined:
> 
> # cat /sys/fs/cgroup/systemd/release_agent
> /usr/lib/systemd/systemd-cgroups-agent
> 
> And if I understand correctly, release agents can only be defined in
> "root" cgroups (so I can't override this in
> /sys/fs/cgroup/systemd/<container>/).  Time to visit the systemd list
> again, maybe.

Yeah.  Well, grab the source and see what it's doing, but also check
the value in the notify_on_release file in
/sys/fs/cgroup/systemd/<container>/ and further sub-directories.