[Bug 1645906] Re: new dist-upgrader tarballs necessary so they are signed with 4k key

[Brian Murray]

Hello Brian, or anyone else affected,

Accepted ubuntu-release-upgrader into xenial-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/ubuntu-release-upgrader/1:16.04.19 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 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, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

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

** Changed in: ubuntu-release-upgrader (Ubuntu Xenial)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

** Changed in: ubuntu-release-upgrader (Ubuntu Trusty)
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1645906

Title:
  new dist-upgrader tarballs necessary so they are signed with 4k key

Status in ubuntu-release-upgrader package in Ubuntu:
  New
Status in update-manager package in Ubuntu:
  Invalid
Status in ubuntu-release-upgrader source package in Precise:
  Invalid
Status in update-manager source package in Precise:
  In Progress
Status in ubuntu-release-upgrader source package in Trusty:
  Fix Committed
Status in update-manager source package in Trusty:
  Invalid
Status in ubuntu-release-upgrader source package in Xenial:
  Fix Committed
Status in update-manager source package in Xenial:
  Invalid
Status in ubuntu-release-upgrader source package in Yakkety:
  Fix Committed
Status in update-manager source package in Yakkety:
  Invalid

Bug description:
  With the ubuntu-archive-publishing change in
  https://code.launchpad.net/~xnox/ubuntu-archive-publishing/migrate-
  dist-upgrade-to-4k/+merge/311181 the signing process for the dist-
  upgrader tarball has been changed.  This change should be tested now,
  rather than doing an ubuntu-release-upgrader change months from now
  and wondering why things aren't working (if they are broken).

  Due to the way the gpg signature is generated we can't just remove it
  and have it regenerated as the timestamp for the signature will not
  change, so the change will not propogate to the mirrors.  Hence the
  need for a mostly no change (mirrors and demotions may change) upload
  of ubuntu-release-upgrader.

  Test Case
  ---------
  1) run do-release-upgrade -p --frontend DistUpgradeViewText
  2) ensure the tarball for the next release e.g. xenial.tar.gz is downloaded and the signature verification passes

  Regression Potential
  --------------------
  It's possible the signing is wrong and the verification of the signature will fail thereby causing release upgrades to be impossible.

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