How can I create a loop-backed storage pool in a custom directory?

LXD
1

I would like to create a loop-backed btrfs-formatted storage pool, but in a directory of my choosing. The default dumps it in /var/snap/lxd/common/lxd/disks/, and specifying source= seems to expect an existing filesystem.

2

Yeah, this isn’t supported as it makes our lives pretty hard in some cases (especially because of the snap mount handling).

If you can instead use a disk partition, that’s far cleaner and faster. If that’s not an option, then you have two ways around this:

  • Create and mount the loop yourself through your host’s /etc/fstab, then feed that path to LXD as a source=
  • Override where the LXD generated disks go by bind-mounting another path over /var/snap/lxd/common/lxd/disks (requires a reboot to work)
1 Like
3

Ah, that’s unfortunate, but fair enough. Thank you.