Seeded snaps broken in the Focal dailies

Hello Paride, or anyone else affected,

Accepted livecd-rootfs into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/livecd-rootfs/2.664.36 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

I'd tested an install of the Ubuntu Live Server image for 20.04.3 (daily build 20220119) and subiquity did launch and 'systemctl status snapd' did not return any complaints. Additionally, I was able to complete the installation process so I think this is resolved. However, core18 wasn't on the image but core20 is.

Discussing this with mwhudson I didn't realize that the server live image is not built with -proposed enabled so while this might have been fixed in subiquity my test didn't actually test the new livecd-rootfs. I've kicked off a daily build of the liveserver image with -proposed enabled.

I tested the daily second daily build (20220119.1) of the Ubuntu Live Server image on an amd64 virtual machine and subiquity started without any issue. Additionally, /snap/core20/ is populated. So I think this change is fine to land in -updates.

Brian built me an ISO using this version of livecd-rootfs and I tested that subiquity started up fine.

This bug was fixed in the package livecd-rootfs - 2.664.36

---------------
livecd-rootfs (2.664.36) focal; urgency=medium

  * live-build/ubuntu-server/hooks/032-installer-squashfs.binary: be more
    careful in deleting snaps that snap-preseed has copied up into the live
    installer layer. (LP: #1952093)

 -- Michael Hudson-Doyle <email address hidden> Thu, 02 Dec 2021 12:05:00 +1300

The verification of the Stable Release Update for livecd-rootfs has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

Thanks Brian for doing the verification.

I'm still not sure on why the images were _not_ broken anymore given that they were not build with -proposed enabled, and the fixed package was only available in -proposed. Maybe something changed in how or which snaps are seeded: as Brian observed core18 is not present anymore. Anyway everything looks sane.