[zfs-discuss] Ubuntu 16.04 with ZFS root

Schlacta, Christ aarcane at aarcane.org
Fri May 20 17:50:57 EDT 2016


If the deb installers could get a partman module that just let's you use
existing folder structure, that would be a great addition not only for zfs,
but for lots of advanced setups, but nobody seems to know how to make that
work...
On May 20, 2016 11:55 AM, "Richard Laager via zfs-discuss" <
zfs-discuss at list.zfsonlinux.org> wrote:

> On 05/20/2016 12:58 PM, Walter Parker via zfs-discuss wrote:
>
>> As far as I can tell:
>> Method 1 is install from scratch on each install (every system gets a
>> clean creation)
>> Method 2 is to copy a pre-installed image to the new system.
>>
>
> No. Method 2 is install each system from scratch as normal on ext4, then
> copy that into ZFS.
>
> There are pros and cons to each.
>
> The data integrity thing was already mentioned. While I agree in theory,
> in practice, it's probably not that big of a problem.
>
> With method 2, you're always getting the output of the standard installer,
> by definition. With method 1, I have to maintain the HOWTO to ensure it
> gives you the same (or as close as possible to the same) output as the
> standard installer. For example, I had to update the list of default group
> memberships for 16.04.
>
> However, maintaining a HOWTO of method 1 makes it very clear (to someone
> who knows what a non-ZFS manual install looks like) what sort of extra
> steps are necessary for a ZFS-on-root install. This provides targets of
> what to eliminate. I did this sort of work for 16.04, reducing the steps a
> bit. Eventually, we will hopefully reach the point where the only extra
> work is `zpool create` and `zfs create`. At that point, it becomes
> trivial-ish to integrate into the real installer.
>
> This is why I personally think method 1 is better. I'm working a path
> towards a goal of the HOWTO disappearing completely, or at least being
> reduced to "here's a recommended partitioning setup for the installer".
>
> --
> Richard
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