[Grml] zfs

[Michael Prokop]

Hi,

CC-ing John, who IIRC isn't subscribed to the mailing list, please
be aware that your mails will end up in moderation queue and you
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* John Covici [Sat Jun 06, 2020 at 01:23:39PM -0400]:

> Any chance of getting sujpport for zfs in this release?  I have been
> using it for years, but grml does not currently support it, so I have
> had to find something else, but it would sure be nice to use grml
> again.

I'm aware of folks having their own custom build of Grml which
includes ZFS support, though providing it OOTB on official Grml
isn't really an option, due to the licensing/legal issues caused by
GPL-2 vs CDDL[1].

What works though is building ZFS on the running Grml live system
(assuming enough RAM is available, worked fine for me e.g. with 2GB
in a VM). Relevant steps, verified on grml64-full 2020.06-rc1:

  apt update
  apt install --yes linux-headers-$(uname -r) gcc
  apt install --yes --no-install-recommends zfs-dkms
  modprobe zfs
  apt install --yes zfsutils-linux

Then you should have everything what's needed to use ZFS on Grml.

BTW: you can even create a Debian package of the resulting zfs
kernel modules for re-usage then:

  apt install --yes --no-install-recommends debhelper
  dkms mkbmdeb zfs/0.8.4   # this assumes you've zfs-dkms v0.8.4 present

This should give you
/var/lib/dkms/zfs/0.8.4/bmdeb/zfs-modules-5.6.0-2-amd64_0.8.4_amd64.deb
which includes the built zfs modules which you could then install on
next boot of Grml without having to go through the compile steps
again.

FTR, we've https://github.com/grml/grml-live/issues/78 to track
"Make ZFS usage as easy as possible", we might come up with 1) a
script which automates the above steps or 2) provide a way how to
provide the zfs-modules-*.deb via deb.grml.org or so, but someone™
needs to find the time to take care of this. :)

[1] https://michael-prokop.at/screeni/screenshot.2020-06-09T09-57-20.png

regards
-mika-
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