Few questions about zvols on LXD manged ZFS pools

[stgraber (Stéphane Graber)]

@mratt

Any problems of this zvol sitting on a LXD managed ZFS pool in the same structure as lxd created block volumes, e.g.

If manually created, it’d be better to put it at lxdpool00/my-zvol/something just to avoid potential name conflicts down the line.

@mratt

Is there a difference between the zfs block volume when created via lxc storage volume create... --type block command, and a zvol created via zfs ?

Nope, we create a zvol internally for --type block.

@mratt

I see devices created by lxc and zfs commands below /dev/zvol, however I’m not permitted to attach a LXD block device to a container (only for non zfs compatible stuff), but I can attach the zvol created with zfs. Is this intended?

You can attach it as a mounted disk using disk type and then pool=your-pool and source=your-volume. If you just want to see it exposed as /dev/sdX, then this isn’t currently possible. We have https://github.com/lxc/lxd/issues/10077 for that.