[Bug 1982540] [NEW] /usr/share/unattended-upgrades/unattended-upgrade-shutdown always running, uses too much memory

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Matthieu Clemenceau (mclemenceau):

On a default idle Ubuntu kinetic container, the second largest process
by resident memory is '/usr/share/unattended-upgrades/unattended-
upgrade-shutdown --wait-for-signal'.

We want unattended-upgrades to be installed by default in all container
images, but this process is heavyweight and needs to go.

I see two possible solutions:
- construct a systemd unit that DTRT at shutdown without having to leave a process resident (but er the u-u maintainer knows a bit about systemd so this may not be feasible with the desired semantics?)
- instead of running the python script, implement a small shell wrapper that waits for the signal and execs u-u-shutdown, so that we only pay the memory cost of this script during shutdown.

** Affects: unattended-upgrades (Ubuntu)
     Importance: High
         Status: New


** Tags: fr-2570
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/usr/share/unattended-upgrades/unattended-upgrade-shutdown always running, uses too much memory
https://bugs.launchpad.net/bugs/1982540
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