[Bug 1716973] Re: Don't pull in network-online.target in apt-daily.timer

[Julian Andres Klode]

xenial verified:

root at eab04dbb263d:/# grep Wants /lib/systemd/system/apt-daily.timer 
Wants=network-online.target
root at eab04dbb263d:/# apt install apt 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libapt-pkg5.0
Suggested packages:
  aptitude | synaptic | wajig dpkg-dev apt-doc python-apt
The following packages will be upgraded:
  apt libapt-pkg5.0
2 upgraded, 0 newly installed, 0 to remove and 12 not upgraded.
Need to get 1746 kB of archives.
After this operation, 1024 B disk space will be freed.
Do you want to continue? [Y/n] y
Get:1 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 libapt-pkg5.0 amd64 1.2.25 [706 kB]
Get:2 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 apt amd64 1.2.25 [1041 kB]
Fetched 1746 kB in 1s (923 kB/s)
debconf: delaying package configuration, since apt-utils is not installed
(Reading database ... 6862 files and directories currently installed.)
Preparing to unpack .../libapt-pkg5.0_1.2.25_amd64.deb ...
Unpacking libapt-pkg5.0:amd64 (1.2.25) over (1.2.24) ...
Processing triggers for libc-bin (2.23-0ubuntu9) ...
Setting up libapt-pkg5.0:amd64 (1.2.25) ...
Processing triggers for libc-bin (2.23-0ubuntu9) ...
(Reading database ... 6862 files and directories currently installed.)
Preparing to unpack .../archives/apt_1.2.25_amd64.deb ...
Unpacking apt (1.2.25) over (1.2.24) ...
Processing triggers for libc-bin (2.23-0ubuntu9) ...
Setting up apt (1.2.25) ...
Processing triggers for libc-bin (2.23-0ubuntu9) ...
root at eab04dbb263d:/# grep Wants /lib/systemd/system/apt-daily.timer 


** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial

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https://bugs.launchpad.net/bugs/1716973

Title:
  Don't pull in network-online.target in apt-daily.timer

Status in apt package in Ubuntu:
  Fix Released
Status in apt source package in Xenial:
  Fix Committed
Status in apt source package in Zesty:
  Fix Committed

Bug description:
  [Impact]
  apt-daily.timer is enabled on every boot and pulls in network-online.target via Wants and After. While nothing has an After=apt-daily.timer (or rather an After=timers.target) and this should thus not impact boot performance, the rc-local.service specifies an After=network-online.target and the login stuff (getty, gdm, etc) is ordered After=rc-local, thus severely increasing the time to login if nothing else pulls in network-online (like an LSB script).

  This works around the problem on most boots, the problem will only
  occur if the timer would have elapsed while the machine was off.

  [Test case]
  Well, the change is fairly obvious. Actually testing that is pointless, and depending on the system configuration, network-online.target might be pulled in by something else. So just look at the file and check that the network-online.target dependency moved to the service.

  [Regression potential]
  Literally none. We just move the dependency to the service which actually needs it.

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