[Bug 1761994] Re: Shift of conntrackd to systemd notification causes upgrade issues from Xenial

[Corey Bryant]

I've uploaded conntrack-tools 1:1.4.4+snapshot20161117-6ubuntu2 to
bionic. This version of the package defaults to using 'Systemd on' for
conntrackd config. I tested upgrades from xenial to bionic with the
following in the bionic config /etc/conntrackd/conntrackd.conf:

1) 'Systemd on'                  # upgrade is successful
2) Systemd config not specified  # upgrade is successful (defaults to 'Systemd on')
3) 'Systemd off'                 # upgrade fails as expected with timeout

I'll submit the patch back to Debian as well.

Note: The package in my ppa now has the new package version.

** Also affects: conntrack-tools (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: conntrack-tools (Ubuntu)
       Status: New => Triaged

** Changed in: conntrack-tools (Ubuntu)
   Importance: Undecided => High

** No longer affects: conntrack (Ubuntu)

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https://bugs.launchpad.net/bugs/1761994

Title:
  Shift of conntrackd to systemd notification causes upgrade issues from
  Xenial

Status in conntrack-tools package in Ubuntu:
  Triaged

Bug description:
  
  In Bionic, conntrackd configuration needs to be updated to use systemd notification otherwise we get problems during the upgrade process.

  Ultimately, it requires putting up with broken debconf scripts in the
  upgrade process, editing the file to reflect the new location, and
  rebooting.

  It may also have to do with the UNIX socket configuration for
  conntrackd which changed between 16.04 and 18.04, to:

          UNIX {
                  Path /var/run/conntrackd.sock
                  Backlog 20
          }

  I think it was previously conntrackd.ctl.

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