Documentation for reproducible filesystems (Was: Reproducible XFS Filesystems Builds for VMs)

[Roland Clobus]

On 16/04/2025 09:12, Holger Levsen wrote:
> On Tue, Apr 15, 2025 at 10:54:32AM -0400, David A. Wheeler via rb-general wrote:
>> May I suggest collecting this general advice for creating reproducible *images*
>> and posting it on the reproducible builds website?
>>
>> Once there's a common spot for it, others may provide suggestions on how to
>> improve it further. It's fine if you want to collect ideas into the best first try,
>> but I'd hate it if this mailing list was the only place to find this out.
>>
>> Few people will create reproducible images - or ask for them - if it's a mystery
>> how to create them.
>   
> indeed and we have https://reproducible-builds.org/docs/system-images/ already.
> 
> source: https://salsa.debian.org/reproducible-builds/reproducible-website.git
> and in there in _docs/system_images.md

For the Debian live images, the scripts to make the images reproducible 
are at Salsa [1], would that be a suitable addendum to the system-images 
page?

@Luca DiMaio: earlier in this thread you mentioned 
'deterministic_rng.so'. Is that something similar to the code I wrote in 
2000-reproducible-function-uuid_generate_random.hook.chroot [2]
and use in 2001-reproducible-fontconfig.hook.chroot [3]? Do you have 
your code available somewhere?

Would it make sense to have the de-randomisation code in a more 
prominent location?

With kind regards,
Roland Clobus

[1] 
https://salsa.debian.org/live-team/live-build/-/tree/master/examples/hooks/reproducible?ref_type=heads
[2] 
https://salsa.debian.org/live-team/live-build/-/blob/master/examples/hooks/reproducible/2000-reproducible-function-uuid_generate_random.hook.chroot?ref_type=heads
[3] 
https://salsa.debian.org/live-team/live-build/-/blob/master/examples/hooks/reproducible/2001-reproducible-fontconfig.hook.chroot?ref_type=heads
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