[Bug 1958863] Re: [SRU] neutron-l3-agent attempts to use non-existing --config-file=/etc/neutron/fwaas_driver.ini

[Corey Bryant]

Tested successfully for wallaby-proposed and victoria-proposed.

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https://bugs.launchpad.net/bugs/1958863

Title:
  [SRU] neutron-l3-agent attempts to use non-existing --config-
  file=/etc/neutron/fwaas_driver.ini

Status in Ubuntu Cloud Archive:
  Fix Committed
Status in Ubuntu Cloud Archive victoria series:
  Fix Committed
Status in Ubuntu Cloud Archive wallaby series:
  Fix Committed
Status in Ubuntu Cloud Archive xena series:
  Fix Committed
Status in Ubuntu Cloud Archive yoga series:
  Fix Committed
Status in neutron package in Ubuntu:
  Fix Committed
Status in neutron source package in Hirsute:
  Won't Fix
Status in neutron source package in Impish:
  Fix Committed
Status in neutron source package in Jammy:
  Fix Committed

Bug description:
  [Impact]
  Installing Openstack Xena following the official documentation for Ubuntu 20.04 (https://docs.openstack.org/install-guide/environment-packages-ubuntu.html) contains outdated init scripts for neutron, which cause neutron l3 agent to fail on startup.

  [Test Case]
  Installing neutron with the following commands :

  add-apt-repository cloud-archive:xena
  apt update
  apt install -y neutron-server neutron-plugin-ml2 neutron-linuxbridge-agent neutron-l3-agent neutron-dhcp-agent neutron-metadata-agent

  will reproduce the issue. (Neutron m3 agent will fail with an
  exception of 'file not found /etc/neutron/fwaas_driver.ini'.).

  The default /etc/neutron/l3_agent.ini needs updating with:
  [DEFAULT]
  interface_driver = openvswitch

  systemctl restart neutron-l3-agent
  sleep 60
  systemctl status neutron-l3-agent

  More information : https://bugs.launchpad.net/neutron/+bug/1958128.

  [Regression Potential]
  This is fixing a regression in the neutron package. neutron-fwaas support was removed in bug #1934129, however neutron-l3-agent wasn't updated to
  deal with the removal of fwaas_driver.ini.

  I don't foresee any regression issues with this fix if it tests
  successfully, and I've already tested the fix prior to uploading to
  jammy.

  [Discussion]
  This was reported against xena originally but affects all releases from victoria and above.

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