[lxc-devel] Unprivileged containers don't start with lxcfs 2.0.0

[Mathias Gibbens]

  This evening I upgraded my lxc/lxcfs install, seeing as how lxcfs
2.0.0 was tagged earlier today. However, with the current lxcfs (2.0.0)
my unprivileged containers fail to start:

> lxc at narya:~$ lxc-start -F -n aule.calenhad.com
> systemd 215 running in system mode. (+PAM +AUDIT +SELINUX +IMA +SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ -SECCOMP -APPARMOR)
> Detected virtualization 'lxc'.
> Detected architecture 'x86-64'.
> 
> Welcome to Debian GNU/Linux 8 (jessie)!
> 
> Set hostname to <aule.calenhad.com>.
> Failed to configure loopback device: Operation not supported
> Failed to install release agent, ignoring: No such file or directory
> Failed to create root cgroup hierarchy: Invalid argument
> Failed to allocate manager object: Invalid argument

  Previously I had been running lxcfs 2.0.0.beta1, which works fine.

  I am running Debian 8 (jessie) on both the host as well as in the unprivileged containers. Current software versions are lxc 2.0.0.rc15, lxcfs 2.0.0.beta1, cgmanager 0.37.

  Additionally, with the now-included systemd unit file in lxcfs, I receive this error when attempting to start the service:

> [/lib/systemd/system/lxcfs.service:11] Unknown lvalue 'Delegate' in section 'Service'

  Maybe this isn't supported in the version of systemd that ships in the current stable release of Debian; I simply commented it out and then the lxcfs service starts properly.

Thanks,
Mathias
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