[lxc-users] About creating a BTRFS file instead of a BTRFS partition

[Serge Hallyn]

Quoting Marcel Sánchez Toledano (marcelsanchezt at gmail.com):
> Partially yes. Thanks for that.
> 
> Maybe is a bit offtopic, but.. Do you know any manual or website where I
> can found information about creating a image file with BRTFS? I have tried
> with no luck...

If you want a loopback file, you can just

sudo lxc-create -t download -B loop -n loop1 -- -d ubuntu -r trusty -a amd64

(just tested, still works for me)

You can specify the loopback size and fstype as well (see lxc-create(1)).