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[Stéphane Graber <stgraber@xxxxxxxxxxxx>]

Oh and the same goes for containers that aren't running systemd but are
running logind as logind also expects to be able to create sub-entries
in the name=systemd controller, which with the current cgroup ownership,
it won't be able to do.

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https://bugs.launchpad.net/bugs/1413927

Title:
  user lxc containers fail to start under systemd: login name=systemd
  cgroup is not owned by user

Status in systemd package in Ubuntu:
  In Progress

Bug description:
  When a user logs in, systemd-logind should create cgroups for the
  user, with the directory (i.e.
  /user.slice/user-1000.slice/session-c2.scope) owned by the user.  This
  is no longer hapening for the name=systemd cgroup.  This prevents
  containers from starting.  (If lxc were to simply not create/use that
  controller, then it would prevent system in the container from using
  it).

  I wanted to test the new lxc with lxcfs. A system container (with
  upstart or systemd) works perfectly well now (great!), but user
  containers regressed:

  $ lxc-create -n v1 -t download -- -d ubuntu -r vivid -a amd64
  $ lxc-start -n v1  -F
  lxc-start: cgmanager.c: lxc_cgmanager_enter: 694 call to cgmanager_move_pid_sync failed: invalid request
  lxc-start: start.c: __lxc_start: 1099 failed to spawn 'v1'
  lxc-start: lxc_start.c: main: 345 The container failed to start.

  My host is running systemd, but cgmanager is running (i. e. it's not
  bug 1400394, I enabled cgmanager.service).

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: lxc 1.1.0~rc1-0ubuntu1
  ProcVersionSignature: Ubuntu 3.18.0-9.10-generic 3.18.2
  Uname: Linux 3.18.0-9-generic x86_64
  ApportVersion: 2.15.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Jan 23 10:35:55 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-11-20 (63 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20141119)
  SourcePackage: lxc
  UpgradeStatus: No upgrade log present (probably fresh install)
  defaults.conf:
   lxc.network.type = veth
   lxc.network.link = lxcbr0
   lxc.network.flags = up
   lxc.network.hwaddr = 00:16:3e:xx:xx:xx
  lxc.conf: lxc.lxcpath = /srv/lxc

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