[Bug 1870876] Re: docker stopped when containerd updated

[Balint Reczey]

*** This bug is a duplicate of bug 1870514 ***
    https://bugs.launchpad.net/bugs/1870514

As a follow-up for the unattended-upgrades problem I've proposed a possible enhancement to protect services by holding back more packages:
https://github.com/mvo5/unattended-upgrades/issues/284

** Bug watch added: github.com/mvo5/unattended-upgrades/issues #284
   https://github.com/mvo5/unattended-upgrades/issues/284

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https://bugs.launchpad.net/bugs/1870876

Title:
  docker stopped when containerd updated

Status in unattended-upgrades package in Ubuntu:
  Confirmed

Bug description:
  When containerd was updated in my bionic instance it stopped docker
  then stopped containerd. When it was done updating containerd it
  brought it back online. docker stayed stopped.

  2020-04-03 06:20:32,973 INFO Packages that will be upgraded: apport
  containerd python3-apport python3-problem-report

  An eoan installation that didn't have this problem had this line:
  2020-04-03 06:06:01,612 INFO Packages that will be upgraded: apport python3-apport python3-problem-report

  So the main difference is that containerd was updated.

  At the end of this systemctl --all reported docker as:
  docker.service                 loaded    inactive dead
  and containerd as:
  containerd.service             loaded    active   running

  
  Description:	Ubuntu 18.04.4 LTS
  Release:	18.04

  unattended-upgrades:
    Installed: 1.1ubuntu1.18.04.14
    Candidate: 1.1ubuntu1.18.04.14
    Version table:
   *** 1.1ubuntu1.18.04.14 500
          500 http://us-central1.gce.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1.1ubuntu1 500
          500 http://us-central1.gce.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

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