Public bug reported:
It would be useful to be able to dispatch a set of livefs builds that
all reliably build from the same point in time in the archive's history,
even if they're dispatched at slightly different times. We did the
InRelease-by-hash work (https://bugs.debian.org/886745, and subsequent
Launchpad publisher changes) as a prerequisite for this. We're now
ready to consider the next stage. I believe that there are three major
chunks of work here:
1) Somebody needs to work out the livecd-rootfs/live-build bits, which I
think ought to be a Foundations job (I don't expect to do this part
myself). It needs to pick up the inrelease-path option from the
sources.list in the environment where livecd-rootfs is run and propagate
that through while building the image, but make sure that the inrelease-
path option *doesn't* end up in the sources.list in the final image
(just like the way we build from ftpmaster.internal but don't actually
leave that in the final image, since it wouldn't work).
2) In parallel with 1), we need to improve Launchpad's internal tracking
of the history of archive index files. At the moment, the only feasible
interface we could offer would be that the entity scheduling livefs
builds would need to work out the SHA-256 hashes of all the relevant
InRelease files and tell Launchpad what to use. This is cumbersome and
hard to automate. Instead, it would be much better to make it work by
timestamp (perhaps even simply having an option to pick whatever's
current when the builds are scheduled), but to do that we need to
convert ArchiveFile into a history table, adding date_created and
date_superseded columns so that we can work out which version was live
at any given time.
3) Once both 1) and 2) are done, we can add the relevant options to
Launchpad's livefs build code to cause the correct sources.list to be
dispatched.
** Affects: launchpad
Importance: High
Status: Triaged
** Affects: livecd-rootfs (Ubuntu)
Importance: Undecided
Status: New
** Tags: feature lp-soyuz soyuz-build soyuz-publish
** Also affects: livecd-rootfs (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1765933
Title:
Allow building livefses against a view of the archive at a fixed point
in time
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