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Date: Mon, 11 Nov 2024 17:47:37 +0000
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Subject: Re: A "diskless" Xen dom0 entirely in the ESP
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From: rptb1+alpine@pobox.com
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On 2024-11-11 17:25, Liam Proven wrote:
> On Sun, 10 Nov 2024 at 13:39, <rptb1+alpine@pobox.com> wrote:
>>
>> I'm interested in creating an Alpine Xen dom0 that runs entirely from
>> the ESP partition
> 
> You might find it useful to look at OneFileLinux, which does exactly this:
> 
> https://github.com/threader/OneFileLinux

Thank you.  That's quite close to what I want.  I can certainly see how 
that works and adapt it.

I also discovered, since I wrote my message, that Alpine's 
setup-bootable *does* create a UEFI-bootable ESP.  The instructions at 
https://wiki.alpinelinux.org/wiki/Create_a_Bootable_Device will get you 
an MBR-based system, but if you create an ESP instead with, e.g.::

   sgdisk --wipe-all /dev/sda
   sgdisk -n1:0:+2G -t1:EF00 -c1:ESP /dev/sda
   mkfs.vfat /dev/sda1
   setup-bootable -v /media/cdrom /dev/sda1

then you will get a UEFI bootable system entirely in the ESP.

It's not *quite* what I wanted (it's huge), but it's another good 
starting point.

Thanks again.