Hi Ole,
more than a decade ago we (GSI IT) funded an effort by a commercial
supporter (Credativ) to get Lustre in shape for inclusion in Debian.
This effort unfortunately went nowhere, but its remains can still be
found on snapshot.debian.org [1].
AFAICT the current upstream packaging has been derived from this project.
The main culprit was that the Lustre development focuses on rather old
enterprise (ie. RHEL) kernels and the newest Lustre did not work with
the latest kernels in Debian upstream which regularly broke the package
in Debian unstable until it was finally removed.
My impression is that this situation has not improved much and you will
end up in a similar situation again.
The development models of Debian and Lustre seem to be too incompatible.
Best
Christopher
[1] https://snapshot.debian.org/package/lustre/