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

[Adam Conrad]

Hello Seth, or anyone else affected,

Accepted systemd into trusty-proposed. The package will build now and be
available at http://launchpad.net/ubuntu/+source/systemd/204-5ubuntu20.2
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: systemd (Ubuntu Trusty)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

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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:
  Fix Committed

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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