[lxc-users] Btrfs gquota and container disk usage limits

[Serge Hallyn]

Quoting Mark Constable (markc at renta.net):
> On 05/04/15 02:22, david.andel at bli.uzh.ch wrote:
> >I see that nobody replied to your question.
> >Have you made any progress in the meantime?
> 
> Not really. I've actually dropped back to using pre-systemd trusty in
> privileged containers until ubuntu 15.04 is released hoping that might
> provide better support for systemd/lxd/unprivileged vivid containers.
> 
> >Also, how did you manage to have your containers v1 and v2 installed
> > into a btrfs subvolume? With lxc-create it's clear, but with lxc launch?
> 
> Looks like lxd automatically creates part of the filesystem as a subvolume

FWIW, at the moment no lxd does no such thing.  Hopefully soon we'll start
exploiting whatever advantages the native fs provides automatically.

> but I'm not sure how rootfs/var/lib/machines fits into the picture, so no,
> I never figured out how to properly set up a lxd container as a subvolume
> let alone how to provide real world usable qgroup quotas. Like I say, I am
> hoping vivid comes with usable lxd containers and decent documentation.
> 
> ~ btrfs sub list / | grep lxd
> ID 2403 gen 554661 top level 1674 path var/lib/lxd/lxc/v1/rootfs/var/lib/machines
> ID 2407 gen 556386 top level 1674 path var/lib/lxd/lxc/v2/rootfs/var/lib/machines
> 
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