On 2015-11-03, Helmut Lichtenberg wrote:
> I updated my nbd-kernel image (Debian Jessie) to a recent kernel
> (4.2.0-0.bpo.1-586) from backports.
>
> The client stops at booting and prints out:
>
>    Could not load neither overlayfs nor aufs

You need a newer version of LTSP to work with newer kernels. I've been
planning on uploading newer versions to backports.debian.org, but have
been waiting for upload rights. I'll try to get it updated soon.


> aufs seems to be absent (no module under /lib/modules/$(uname -r) and the
> overlayfs module is called overlay.ko .
>
> Will aufs be replaced by overlay and why won't load the overlay module?

Yes, aufs is no longer shipped in Debian kernels, and overlay FS is
named "overlay" in mainline linux and the Debian kernels, and requires
slightly different syntax from "overlayfs".

You *might* be able to build aufs out-of-tree and use that. It would be
good to know if that's an option.


Unfortunately, overlay FS in mainline linux doesn't properly support NFS
as a backend, so the newer versions of LTSP in Debian switched to NBD by
default:

  https://bugs.debian.org/786925

Although it sounds like you're using NBD anyways, so maybe that's a
benefit!


live well,
  vagrant

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