[Bug 1828100] Re: KernelRemoval section of DistUpgrade.cfg shouldn't require manual updating

[Brian Murray]

I went ahead and disabled the identifyObsoleteKernels function and here
is the relevant part of /var/log/dist-upgrade/main.log:

2019-06-19 15:37:29,707 DEBUG Obsolete: libisl19 libpoppler85 linux-headers-5.0.0-13 linux-headers-5.0.0-13-generic linux-image-5.0.0-13-generic linux-modules-5.0.0-13-generic linux-modules-extra-5.0.0-13-generic
2019-06-19 15:37:29,707 DEBUG Foreign:
2019-06-19 15:37:29,707 DEBUG forced_obsoletes: ['desktop-effects', 'gnome-app-install', 'policykit-gnome', 'gnome-mount']
2019-06-19 15:37:30,001 DEBUG Unused dependencies: libisl19 pppconfig ifupdown libpoppler85 pppoeconf
2019-06-19 15:37:30,001 DEBUG remove_candidates: '{'libisl19', 'linux-image-5.0.0-13-generic', 'gnome-mount', 'policykit-gnome', 'desktop-effects', 'linux-modules-5.0.0-13-generic', 'pppconfig', 'linux-modules-extra-5.0.0-13-generic', 'gnome-app-install', 'libpoppler85', 'ifupdown', 'linux-headers-5.0.0-13', 'linux-headers-5.0.0-13-generic', 'pppoeconf'}'
2019-06-19 15:37:30,001 DEBUG Start checking for obsolete pkgs
2019-06-19 15:37:30,100 DEBUG skipping running kernel pkg 'linux-image-5.0.0-13-generic'
2019-06-19 15:37:30,100 DEBUG 'linux-image-5.0.0-13-generic' scheduled for remove but not safe to remove, skipping
2019-06-19 15:37:30,101 DEBUG skipping running kernel pkg 'linux-modules-5.0.0-13-generic'
2019-06-19 15:37:30,101 DEBUG 'linux-modules-5.0.0-13-generic' scheduled for remove but not safe to remove, skipping
2019-06-19 15:37:30,198 DEBUG skipping running kernel pkg 'linux-modules-extra-5.0.0-13-generic'
2019-06-19 15:37:30,198 DEBUG 'linux-modules-extra-5.0.0-13-generic' scheduled for remove but not safe to remove, skipping
2019-06-19 15:37:30,720 DEBUG skipping running kernel pkg 'linux-headers-5.0.0-13-generic'
2019-06-19 15:37:30,721 DEBUG 'linux-headers-5.0.0-13-generic' scheduled for remove but not safe to remove, skipping
2019-06-19 15:37:30,822 DEBUG Finish checking for obsolete pkgs
2019-06-19 15:37:30,861 DEBUG The following packages are marked for removal: linux-headers-5.0.0-13 ifupdown linux-headers-5.0.0-13-generic pppoeconf libisl19 pppconfig libpoppler85

So just removing the function seems like the best way forward.

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https://bugs.launchpad.net/bugs/1828100

Title:
  KernelRemoval section of DistUpgrade.cfg shouldn't require manual
  updating

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed
Status in ubuntu-release-upgrader source package in Eoan:
  Confirmed

Bug description:
  Currently the method to determine kernels to auto remove uses a hard-
  coded version number and package base names in DistUpgrade.cfg. This
  need to be updated for every release of Ubuntu and has been missed in
  the past - bug 1828072. It'd be better if the autoremovalable kernels
  did not need to be updated all the time and instead utilized the logic
  apt uses (/etc/apt/apt.conf.d/01autoremove) to determine what kernels
  are removable.

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