anyone compile and install ZFS manually?

[Phil Marsh]

Hi Sean, Bob, Sy, All,

From:

https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/2044657

It appears that the Ubuntu team are aware of this and working on this and
for Ubuntu 22.04 (Jammy) they plan to update from ZFS 2.1.5 to ZFS 2.1.14.
Hoping they can do it soon.

By the way, I was able to get ZFS 2.2.2 running on one of my Ubuntu
machines (semi-production, not my critical server) with dkms-zfs2.2.2, but
I could not get other ZFS-related software utilities like zsys installed
for this version. I'm thinking all I really need is ZFS2.2.2 itself and
dkms-zfs2.2.2? I got to the above point using OpenZFS build instructions
https://openzfs.github.io/openzfs-docs/Developer%20Resources/Building%20ZFS.html

and
https://openzfs.github.io/openzfs-docs/Developer%20Resources/Custom%20Packages.html

I had noticed that I had to use the RPM-converted deb-based DKMS and user
packages procedure as the native version had some dependency issues.

What if I don't get say zsys or some other packages with ZFS? I'm hoping
the snapshots will still work but need to try that out.

After building, you will see .deb packages which I think, you can use to
install ZFS and other associated programs. It seems that the order of
installation was important and perhaps you should install the DKMS package
first then ZFS, then try the others. But I also was not able to install all
the available debs due to dependency errors. However, the resulting ZFS
2.2.2 installation did seem to work.

Moreover, and you likely know this already, you might want to hold off
upgrading your ZFS pools themselves after upgrading to ZFS 2.2.2 in case
you need to fall back to the original ZFS.

I can elaborate after I use trial and error to get a stable method but you
can try this yourself on a chroot machine, virtual machine, or
non-production box.

Best of luck and thanks

Phil

On Mon, Dec 4, 2023 at 2:44 PM Sean Reifschneider <jafo00 at gmail.com> wrote:

> When I want to update software on an Ubuntu system, the first place I look
> is to go to packages.ubuntu.com and grab a version from there (usually
> I'll grab the one from the most recent release, in this case 23.11, then if
> that one has issues building I'll grab the one matching my release, in this
> case 22.04), grab the "debian.tar.xz" and try extracting that in the latest
> source, and try using that deb to build it.  In this case since there's a
> kernel component, you probably want to start with the version matching your
> release, 22.04.
> http://archive.ubuntu.com/ubuntu/pool/main/z/zfs-linux/zfs-linux_2.1.5-1ubuntu6~22.04.2.debian.tar.xz
>
> Then grab the latest zfs:
> https://github.com/openzfs/zfs/releases/download/zfs-2.2.2/zfs-2.2.2.tar.gz
>
> Extract ZFS, then go into that directory and extract the debian.tar.xz
>
> Then run "debuild" and see what breaks.
>
> Because this is ZFS we're talking about, it is heavily patched, and so
> it's not looking like it'll cleanly build.  But, you now have a set of
> patches you can check to see what needed to happen to the 2.1.5 code to
> integrate into Ubuntu, and what sort of things you might want to do to the
> 2.2.2 code...
>
> On Sun, Dec 3, 2023 at 2:54 PM Bob Proulx <bob at proulx.com> wrote:
>
>> > Basically, my question amounts to:
>> > How do I install ZFS via manual compilation to get the latest version so
>> > that I can use zfs-dkms or equivalent to automatically compile and
>> install
>> > kernel modules when the kernel is updated?
>>
>> First, I have no idea!  I haven't done it.  But to compile it from
>> source I would think the Gentoo instructions might help.  Then combine
>> that with the DKMS instructions.
>>
>>     https://wiki.gentoo.org/wiki/ZFS
>>     https://help.ubuntu.com/community/DKMS
>>
>> That information will probably need to be combined with compiling your
>> own custom Ubuntu kernel.  In the long distant past I had troubles
>> matching expected versions between modules and prebuilt kernels and
>> found it easier to compile both.
>>
>>     https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel
>>
>> Again I haven't done it.  I don't know what problems will appear.  But
>> not seeing anyone else jump in with something I thought I would
>> contribute the above.  Little help though it might be.
>>
>> Bob
>>
>
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