install chromium in lxc container for 20.04 fails

[Mike Bernson]

when trying to install chromium in 20.04 in a lxc container to fails to install with the following:
root@python:~# apt-get install chromium-browser
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  libfuse2 snapd squashfs-tools
Suggested packages:
  fuse zenity | kdialog
The following NEW packages will be installed:
  chromium-browser libfuse2 snapd squashfs-tools
0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/27.5 MB of archives.
After this operation, 121 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Preconfiguring packages ...
Selecting previously unselected package squashfs-tools.
(Reading database ... 100799 files and directories currently installed.)
Preparing to unpack .../squashfs-tools_1%3a4.4-1_amd64.deb ...
Unpacking squashfs-tools (1:4.4-1) ...
Selecting previously unselected package libfuse2:amd64.
Preparing to unpack .../libfuse2_2.9.9-3_amd64.deb ...
Unpacking libfuse2:amd64 (2.9.9-3) ...
Selecting previously unselected package snapd.
Preparing to unpack .../snapd_2.45.1+20.04.2_amd64.deb ...
Unpacking snapd (2.45.1+20.04.2) ...
Setting up squashfs-tools (1:4.4-1) ...
Setting up libfuse2:amd64 (2.9.9-3) ...
Setting up snapd (2.45.1+20.04.2) ...
Cache read/write disabled: interface file missing. (Kernel needs AppArmor 2.4 compatibility patch.)
Warning: unable to find a suitable fs in /proc/mounts, is it mounted?
Use --subdomainfs to override.
snapd.failure.service is a disabled or a static unit, not starting it.
snapd.snap-repair.service is a disabled or a static unit, not starting it.
(Reading database ... 100896 files and directories currently installed.)
Preparing to unpack .../chromium-browser_83.0.4103.97-0ubuntu0.20.04.1_amd64.deb ...
=> Installing the chromium snap
==> Checking connectivity with the snap store
==> Installing the chromium snap
error: system does not fully support snapd: apparmor detected but insufficient
       permissions to use it
dpkg: error processing archive /var/cache/apt/archives/chromium-browser_83.0.4103.97-0ubuntu0.20.04.1_amd64.deb (--unpack):
 new chromium-browser package pre-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/chromium-browser_83.0.4103.97-0ubuntu0.20.04.1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@python:~#

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: chromium-browser (not installed)
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: skip
Date: Tue Jul 28 18:14:27 2020
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: chromium-browser
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for your bug report, that's a snapd issue, sounds similar to bug #1865503

[Mike Bernson (mike-mlb)]

This might have the same root cause but 1865503 is using LXD where I had the problem using
lxc (lxc-start).

Once fixed need to make sure the fix work under lxc (lxc-start) also.