[Bug 1317179] Re: lxc containers fail to start in trusty with newer kernels

[Stéphane Graber]

Cool, thanks Martin!

I sort of wish there were a magic "all" keyword or something in there
but well, I don't expect the cgroup controller list to grow too much
during the lifetime of the LTS and I suspect our actual 14.10
implementation will be quite different anyway...

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https://bugs.launchpad.net/bugs/1317179

Title:
  lxc containers fail to start in trusty with newer kernels

Status in “systemd” package in Ubuntu:
  Fix Released
Status in “systemd” source package in Trusty:
  In Progress

Bug description:
  When running a trusty userspace with a newer kernel (e.g. 3.15-rc4),
  attempting to start a container fails:

  $ lxc-start -n p2
  lxc_container: call to cgmanager_create_sync failed: invalid request
  lxc_container: Failed to create net_cls:p2
  lxc_container: Error creating cgroup net_cls:p2
  lxc_container: failed creating cgroups
  lxc_container: failed to spawn 'p2'

  Iiuc, this seems to be caused new cgroups in the kernel which aren't
  enabled for systemd but that lxc tries to configure anyway.

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