[Bug 1927868] Please test proposed package

[Corey Bryant]

Hello Alexandros, or anyone else affected,

Accepted neutron into victoria-proposed. The package will build now and
be available in the Ubuntu Cloud Archive in a few hours, and then in the
-proposed repository.

Please help us by testing this new package. To enable the -proposed
repository:

  sudo add-apt-repository cloud-archive:victoria-proposed
  sudo apt-get update

Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-victoria-needed to verification-victoria-done. If it
does not fix the bug for you, please add a comment stating that, and
change the tag to verification-victoria-failed. In either case, details
of your testing will help us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in
advance!

** Changed in: cloud-archive/victoria
       Status: Triaged => Fix Committed

** Tags added: verification-victoria-needed

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https://bugs.launchpad.net/bugs/1927868

Title:
  vRouter not working after update to 16.3.1

Status in Ubuntu Cloud Archive:
  Triaged
Status in Ubuntu Cloud Archive train series:
  Fix Committed
Status in Ubuntu Cloud Archive ussuri series:
  Triaged
Status in Ubuntu Cloud Archive victoria series:
  Fix Committed
Status in Ubuntu Cloud Archive wallaby series:
  Triaged
Status in Ubuntu Cloud Archive xena series:
  Triaged
Status in neutron:
  New
Status in neutron package in Ubuntu:
  Triaged
Status in neutron source package in Focal:
  Fix Committed
Status in neutron source package in Hirsute:
  Fix Committed
Status in neutron source package in Impish:
  Triaged

Bug description:
  We run a juju managed Openstack Ussuri on Bionic. After updating
  neutron packages from 16.3.0 to 16.3.1 all virtual routers stopped
  working. It seems that most (not all) namespaces are created but have
  only the lo interface and sometime the ha-XYZ interface in DOWN state.
  The underlying tap interfaces are also in down.

  neutron-l3-agent has many logs similar to the following:
  2021-05-08 15:01:45.286 39411 ERROR neutron.agent.l3.ha_router [-] Gateway interface for router 02945b59-639b-41be-8237-3b7933b4e32d was not set up; router will not work properly

  and journal logs report at around the same time
  May 08 15:01:40 lar1615.srv-louros.grnet.gr neutron-keepalived-state-change[18596]: 2021-05-08 15:01:40.765 18596 INFO neutron.agent.linux.ip_lib [-] Failed sending gratuitous ARP to 62.62.62.62 on qg-5a6efe8c-6b in namespace qrouter-02945b59-639b-41be-8237-3b7933b4e32d: Exit code: 2; Stdin: ; Stdout: Interface "qg-5a6efe8c-6b" is down
  May 08 15:01:40 lar1615.srv-louros.grnet.gr neutron-keepalived-state-change[18596]: 2021-05-08 15:01:40.767 18596 INFO neutron.agent.linux.ip_lib [-] Interface qg-5a6efe8c-6b or address 62.62.62.62 in namespace qrouter-02945b59-639b-41be-8237-3b7933b4e32d was deleted concurrently

  The neutron packages installed are:

  ii  neutron-common                         2:16.3.1-0ubuntu1~cloud0                                    all          Neutron is a virtual network service for Openstack - common
  ii  neutron-dhcp-agent                     2:16.3.1-0ubuntu1~cloud0                                    all          Neutron is a virtual network service for Openstack - DHCP agent
  ii  neutron-l3-agent                       2:16.3.1-0ubuntu1~cloud0                                    all          Neutron is a virtual network service for Openstack - l3 agent
  ii  neutron-metadata-agent                 2:16.3.1-0ubuntu1~cloud0                                    all          Neutron is a virtual network service for Openstack - metadata agent
  ii  neutron-metering-agent                 2:16.3.1-0ubuntu1~cloud0                                    all          Neutron is a virtual network service for Openstack - metering agent
  ii  neutron-openvswitch-agent              2:16.3.1-0ubuntu1~cloud0                                    all          Neutron is a virtual network service for Openstack - Open vSwitch plugin agent
  ii  python3-neutron                        2:16.3.1-0ubuntu1~cloud0                                    all          Neutron is a virtual network service for Openstack - Python library
  ii  python3-neutron-lib                    2.3.0-0ubuntu1~cloud0                                       all          Neutron shared routines and utilities - Python 3.x
  ii  python3-neutronclient                  1:7.1.1-0ubuntu1~cloud0                                     all          client API library for Neutron - Python 3.x

  Downgrading to 16.3.0 resolves the issues.

  =================================

  Ubuntu SRU details:

  [Impact]
  See above.

  [Test Case]
  Deploy openstack with l3ha and create several HA routers, the number required varies per environment. It is probably best to deploy a known bad version of the package, ensure it is failing, upgrade to the version in proposed, and re-test several times to confirm it is fixed.

  Restarting neutron-l3-agent should expect all HA Routers are restored.

  [Regression Potential]
  This change is fixing a regression by reverting a patch that was introduced in a stable point release of neutron.

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