Public bug reported:
[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)
** Affects: unattended-upgrades (Ubuntu)
Importance: Undecided
Status: Fix Released
** Affects: unattended-upgrades (Debian)
Importance: Unknown
Status: Unknown
** Bug watch added: Debian Bug tracker #855570
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=855570
** Also affects: unattended-upgrades (Debian) via
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=855570
Importance: Unknown
Status: Unknown
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https://bugs.launchpad.net/bugs/1781183
Title:
Skip updates on metered connections
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