Re: btrfs, ostree, systemd-nspawn creating subvolumes for containers

[Colin Walters <walters verbum org>]

On Thu, Jul 16, 2015, at 12:11 AM, Chris Murphy wrote:
> Hi,
>
> Does anyone know off hand what the interaction is between ostree and
> systemd on btrfs when creating new ostrees and doing rollbacks? I
> haven't tested this myself yet.

OSTree never itself touches block storage.  So the answer is the same
for anything in /var - it's untouched between upgrades and rollbacks
by OSTree itself.

You can't create subvolumes anywhere besides /etc and /var when
using OSTree.

(Remember, /home -> /var/home etc.)