[Bug 1781183] Please test proposed package

[Łukasz Zemczak]

Hello Balint, or anyone else affected,

Accepted unattended-upgrades into xenial-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/unattended-upgrades/1.1ubuntu1.18.04.7~16.04.1 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 and change the tag from
verification-needed-xenial to verification-done-xenial. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-xenial. 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.

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https://bugs.launchpad.net/bugs/1781183

Title:
  Skip updates on metered connections

Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in unattended-upgrades source package in Xenial:
  Fix Committed
Status in unattended-upgrades source package in Bionic:
  Fix Released
Status in unattended-upgrades package in Debian:
  Fix Released

Bug description:
  [Impact]

   * Systems running unattended-upgrades may download updates over
  metered connections causing excessive data usage possibly making users
  being charged for the downloads.

   * Avoiding users being unexpectedly charged due to unattended-
  upgrades' activity warrants an SRU, IMO.

   * The fix uses
  NetworkMonitor.get_network_metered(NetworkMonitor.get_default()) for
  deciding if the connection is metered and skips or gracefully stops
  updates.

  [Test Case]

   * Run "unattended-upgrades --dry-run --verbose" on metered connection
     - The unfixed versions should provide the following output with default configuration:
  $ sudo unattended-upgrade --dry-run --verbose 
  Initial blacklisted packages: 
  Initial whitelisted packages: 
  Starting unattended upgrades script
  Allowed origins are: o=Ubuntu,a=bionic, o=Ubuntu,a=bionic-security, o=UbuntuESM,a=bionic
  No packages found that can be upgraded unattended and no pending auto-removals

     - The fixed versions should provide the following output with default configuration:
  Initial blacklisted packages: 
  Initial whitelisted packages: 
  Starting unattended upgrades script
  Allowed origins are: o=Ubuntu,a=bionic, o=Ubuntu,a=bionic-security, o=UbuntuESM,a=bionic
  System is on metered connection, stopping
   
    - You can check if the default route is on metered connection by running:
  nmcli -t -f GENERAL.DEVICE,GENERAL.METERED dev show `ip route list 0/0 | sed -r 's/.*dev (\S*).*/\1/g'`

    - Also run fixed u-u on not metered connection to check if it still works. U-u in lxc for example does not detect the connection to be metered.
    - Check if the following configuration can enable updates even on metered connections:
  $ cat /etc/apt/apt.conf.d/51unattended-upgrades-metered 
  Unattended-Upgrade::Skip-Updates-On-Metered-Connections "false";

  [Regression Potential]

   * Unattended-upgrades may skip updates even on not metered connections or crash, but those are not likely.
   * U-u also adds two new dependencies with the fix which can be seen as a regression, but those packages exist on most Ubuntu installations already. (The packages are: gir1.2-glib-2.0 and python3-gi)

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