What init system are you using on this system?
systemd would automatically mount those cgroups which then wouldn't need
the help of cgroup-lite (preferred) or cgroupfs-mount (which you used).
But if you're using upstart on Ubuntu 16.04, then you indeed do need one
of those two packages installed.
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https://bugs.launchpad.net/bugs/1620774
Title:
lxc container does not start: cgroupfs failed to detect cgroup
metadata
Status in lxc package in Ubuntu:
New
Bug description:
lxc container failed to start until after I installed cgroupfs-mount
After a recent upgrade, I received the following error messages when
start an lxc container:
kevin@awabi:~$ sudo lxc-start -F -n escale_build
lxc-start: cgroups/cgfs.c: cgfs_init: 2288 cgroupfs failed to detect cgroup
metadata
lxc-start: start.c: lxc_spawn: 1094 failed initializing cgroup support
lxc-start: start.c: __lxc_start: 1354 failed to spawn 'escale_build'
lxc-start:
tools/lxc_start.c: main: 344 The container failed to start.
lxc-start: tools/lxc_start.c: main: 348 Additional information can be
obtained by setting the --logfile and --logpriority options.
aptitude install cgroupfs-mount
Then I could successful start my container.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: lxc 2.0.4-0ubuntu1~ubuntu16.04.2
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Sep 6 11:26:12 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-05-18 (477 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
PackageArchitecture: all
SourcePackage: lxc
UpgradeStatus: Upgraded to xenial on 2016-05-30 (99 days ago)
defaults.conf:
lxc.network.type = veth
lxc.network.link = lxcbr0
lxc.network.flags = up
lxc.network.hwaddr = 00:16:3e:xx:xx:xx
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