[Bug 1796376] Re: Bug #1739107 fix causes linux-cloud-tools-common not to be upgradable with unattended-upgrades on shutdown mode

[Guillaume Penin]

Hi Eric,

I confirm that this behaviour can only be reproduced in 'uu' context and
only in 'shutdown mode'.

I can also confirm that the upgrade process is now OK in Bionic with
your test package :

- unattended-upgrades version after the test package installation :

ii  unattended-upgrades                   1.1ubuntu1.18.04.6+testpkgb1
all          automatic installation of security upgrades

- dpkg status for linux-cloud-tools-common after reboot + 'uu' in
'shutdown mode' :

ii  linux-cloud-tools-common              4.15.0-36.39
all          Linux kernel version specific cloud tools for version
4.15.0

- APT logs for linux-cloud-tools-common :

Start-Date: 2018-11-02  16:28:56
Commandline: /usr/bin/unattended-upgrade
Upgrade: linux-cloud-tools-common:amd64 (4.15.0-34.37, 4.15.0-36.39)
End-Date: 2018-11-02  16:29:01

Would it also be possible to backport the fix in Xenial, as this version
is also impacted ?

Thanks a lot for your help.

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https://bugs.launchpad.net/bugs/1796376

Title:
  Bug #1739107 fix causes linux-cloud-tools-common not to be upgradable
  with unattended-upgrades on shutdown mode

Status in linux package in Ubuntu:
  Invalid
Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in linux source package in Bionic:
  Invalid
Status in unattended-upgrades source package in Bionic:
  Confirmed
Status in linux source package in Cosmic:
  Invalid
Status in unattended-upgrades source package in Cosmic:
  Fix Released
Status in linux source package in Disco:
  Invalid
Status in unattended-upgrades source package in Disco:
  Fix Released

Bug description:
  Since the following linux-cloud-tools-common package versions :

  Xenial : 4.4.0-135.161
  Bionic : 4.15.0-34.37

  the Systemd service unit file for hv-kvp-daemon has been modified with new dependencies that make the package unable to be upgraded with unattended-upgrades on shutdown mode.
  Unattended-upgrades hangs with the linux-cloud-tools-common package during "Preparing to unpack". The server restarts after the unattended-upgrades service timeout expires.

  - Package state after reboot :

  iFR linux-cloud-tools-common              4.15.0-34.37
  all          Linux kernel version specific cloud tools for version
  4.15.0

  - Unattended-upgrades dpkg logs :

  Log started: 2018-10-05  17:59:04
  (Reading database ... 52043 files and directories currently installed.)
  Preparing to unpack .../linux-cloud-tools-common_4.15.0-36.39_all.deb ...
  Log ended: 2018-10-05  18:00:54

  - Impact :

  The current impact is very important as all security updates are
  blocked until you manually fix each server with :

  dpkg --configure -a
  apt install --only-upgrade linux-cloud-tools-common

  - Workaround/Fix :

  As a simple straightforward fix, replacing :

  Before=shutdown.target cloud-init-local.service walinuxagent.service

  with :

  Before=shutdown.target walinuxagent.service

  makes the package upgradable during shutdown.

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