Public bug reported: It seems a fairly recent update to LXC has caused this. This is a privileged container. I will attach debug output when trying to start the container.
ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: lxc 1.1.0~rc4-0ubuntu1 ProcVersionSignature: Ubuntu 3.18.0-12.13-generic 3.18.4 Uname: Linux 3.18.0-12-generic x86_64 ApportVersion: 2.15.1-0ubuntu4 Architecture: amd64 CurrentDesktop: Unity Date: Wed Feb 4 02:41:39 2015 InstallationDate: Installed on 2013-03-18 (687 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) SourcePackage: lxc UpgradeStatus: Upgraded to vivid on 2014-10-20 (106 days ago) ** Affects: lxc (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug vivid -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs