[Bug 1826896] Re: do-release-upgrade fails after cosmic.tar.gz extraction on 18.04.2 LTS

[Brian Murray]

I was able to recreate this by removing the /var/log/installer folder
and replacing it with a zero byte file.

bdmurray at clean-bionic-amd64:~$ sudo rm -fr /var/log/installer
[sudo] password for bdmurray:
bdmurray at clean-bionic-amd64:~$ sudo touch /var/log/installer
bdmurray at clean-bionic-amd64:~$ do-release-upgrade 
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [819 B]                                                                                                                           
Get:2 Upgrade tool [1,243 kB]                                                                                                                                  
Fetched 1,244 kB in 0s (0 B/s)                                                                                                                                 
authenticate 'cosmic.tar.gz' against 'cosmic.tar.gz.gpg' 
extracting 'cosmic.tar.gz'
can't load DistUpgradeViewText ([Errno 20] Not a directory: '/var/log/installer/media-info')
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
can't load DistUpgradeViewGtk3 ([Errno 20] Not a directory: '/var/log/installer/media-info')
can't load DistUpgradeViewKDE (No module named 'PyQt4')
can't load DistUpgradeViewText ([Errno 20] Not a directory: '/var/log/installer/media-info')
No view can be imported, aborting

Given that ubiquity creates the /var/log/installer folder and that I'm
unable to recreate this by just removing the folder I'm setting this to
a low priority.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Triaged

** Changed in: ubuntu-release-upgrader (Ubuntu)
   Importance: Undecided => Low

** Summary changed:

- do-release-upgrade fails after cosmic.tar.gz extraction on 18.04.2 LTS
+ do-release-upgrade fails if /var/log/installer is a file

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https://bugs.launchpad.net/bugs/1826896

Title:
  do-release-upgrade fails if /var/log/installer is a file

Status in ubuntu-release-upgrader package in Ubuntu:
  Triaged

Bug description:
  I did allow normal installs, not only lts. but it always ends with the
  same error

  output of lsb_release -rd:
  `root at play:~# lsb_release -rd
  Description:    Ubuntu 18.04.2 LTS
  Release:        18.04`

  output of do-release-upgrade:
  `root at play:~# do-release-upgrade
  Checking for a new Ubuntu release
  Get:1 Upgrade tool signature [819 B]
  Get:2 Upgrade tool [1,243 kB]
  Fetched 1,244 kB in 0s (0 B/s)
  authenticate 'cosmic.tar.gz' against 'cosmic.tar.gz.gpg'
  extracting 'cosmic.tar.gz'
  can't load DistUpgradeViewText ([Errno 20] Not a directory: '/var/log/installer/media-info')
  can't load DistUpgradeViewGtk3 (Namespace Vte not available)
  can't load DistUpgradeViewKDE (No module named 'PyQt4')
  can't load DistUpgradeViewText ([Errno 20] Not a directory: '/var/log/installer/media-info')
  No view can be imported, aborting
  `

  I'm not sure what is going on, but I did have some DNS related issues
  where resolv.conf was getting overwritten with the 127 address which
  made apt, wget, ping stop working.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.31
  ProcVersionSignature: Ubuntu 4.15.0-47.50-generic 4.15.18
  Uname: Linux 4.15.0-47-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: amd64
  CrashDB: ubuntu
  Date: Mon Apr 29 17:45:06 2019
  PackageArchitecture: all
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to bionic on 2019-04-29 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2019-04-29T00:55:40.078049

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