[Bug 1942276] Re: docker 20.10.7-0ubuntu2 fails to start when installed inside Impish LXD container

[Sergio Durigan Junior]

FWIW, I was able to reproduce this problem even inside a VM, which means
that this is not related specifically to LXD containers.

Another interesting point here is the fact that a lot of important
systemd services are unable to restart after the libc upgrade.  We end
up with a system without internet connectivity, for example.

I'm adding a glibc task to this bug and a block-proposed tag, as well as
retitling it.

** Also affects: glibc (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: glibc (Ubuntu)
   Importance: Undecided => High

** Tags added: block-proposed

** Summary changed:

- docker 20.10.7-0ubuntu2 fails to start when installed inside Impish LXD container
+ glibc 2.34 upgrade will break some essential services

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https://bugs.launchpad.net/bugs/1942276

Title:
  glibc 2.34 upgrade will break some essential services

Status in docker.io package in Ubuntu:
  New
Status in glibc package in Ubuntu:
  New

Bug description:
  This bug is blocking docker.io on update-excuses.

  I noticed that docker.io version 20.10.7-0ubuntu2 (currently in
  impish-proposed) is failing to start when installed inside an Impish
  LXD container.  You can reproduce the bug by doing:

  $ lxc launch ubuntu-daily:impish test-docker -c security.nesting=true
  $ lxc shell test-docker
  # cat <<EOF >/etc/apt/sources.list.d/ubuntu-$(lsb_release -cs)-proposed.list
  deb http://archive.ubuntu.com/ubuntu/ $(lsb_release -cs)-proposed restricted main multiverse universe
  EOF
  # apt update
  # apt install docker.io -y
  ...
  Setting up docker.io (20.10.7-0ubuntu2) ...                                                                                                                                                  
  Adding group `docker' (GID 120) ...                                                                                                                                                          
  Done.                                                                                                                                                                                        
  Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /lib/systemd/system/docker.service.                                                                             
  Created symlink /etc/systemd/system/sockets.target.wants/docker.socket → /lib/systemd/system/docker.socket.                                                                                  
  A dependency job for docker.service failed. See 'journalctl -xe' for details.                                                                                                                
  invoke-rc.d: initscript docker, action "start" failed.                                                                                                                                       
  ○ docker.service - Docker Application Container Engine                                        
       Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)                                                                                                    
       Active: inactive (dead)                                                                  
  TriggeredBy: × docker.socket                                                                                                                                                                 
         Docs: https://docs.docker.com                                                                                                                                                         
                                                                                                                                                                                               
  Sep 01 01:52:47 test-docker systemd[1]: Dependency failed for Docker Application Container Engine.
  Sep 01 01:52:47 test-docker systemd[1]: docker.service: Job docker.service/start failed with result 'dependency'.
  ...

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