This bug was fixed in the package unattended-upgrades - 0.92ubuntu1.2
---------------
unattended-upgrades (0.92ubuntu1.2) yakkety; urgency=medium
* Ensure that network and local filesystems are available when running
unattended-upgrades during shutdown mode. (LP: #1618900)
-- Brian Murray <br...@ubuntu.com> Wed, 14 Dec 2016 13:31:31 -0800
** Changed in: unattended-upgrades (Ubuntu Yakkety)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1618900
Title:
[Xenial/0.90] Systemd dependencies issues when used in "Shutdown mode"
Status in unattended-upgrades package in Ubuntu:
Fix Released
Status in unattended-upgrades source package in Xenial:
Fix Released
Status in unattended-upgrades source package in Yakkety:
Fix Released
Bug description:
[Impact]
There are some race conditions in unattended-upgrades when it is used in
shutdown mode. It is possible that the network has already been brought down or
for a local file system, like /var/, to be unmounted before the
unattended-upgrades script is run. This then causes the updates not to be
installed thereby making systems less secure - if security updates are enabled.
[Test Case]
Because this is a race condition, I haven't actually been able to recreate
the bug. However, the fix is straightforward and testing for regressions
should be sufficient.
1) On a freshly installed system.
2) Modify /etc/apt/apt.conf.d/50unattended-upgrades so that
Unattended-Upgrade::InstallOnShutdown "true"; is not commented out.
3) Reboot and watch updates being installed
4) Verify updates were installed by reviewing
/var/log/unattended-upgrades/unattended-upgrades.log
5) Uncomment -updates in 50unattended-upgrades
Repeats steps 3 and 4 again. There isn't any need to run unattended-
upgrades in *not* shutdown mode because we have only modified the
systemd service file.
[Regression Potential]
There is little chance of a regression, but because of the change (and this
feature now working better) its possible the shutdown process will take longer
and surprise users.
Original Description
--------------------
Using unattended-upgrades 0.90 in "Shutdown mode" on Ubuntu Xenial, we
encounter the following systemd dependencies issues :
- The network is often down when unattended-upgrades is running, so packages
can not be downloaded (can be mitigated by using
APT::Periodic::Download-Upgradeable-Packages "1";) :
=> ERROR An error occurred: 'Could not resolve host: ****.fr'
=> ERROR The URI
'https://****.fr:33000/ubuntu-security/pool/main/libi/libidn/libidn11_1.32-3ubuntu1.1_amd64.deb'
failed to download, aborting
- Important mountpoints like /boot are unmounted before unattended-upgrades
is running, so newer kernels can not be installed properly (ramdisk and grub
configuration can not be generated)
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