Geneve allocation is not update during migration from ml2/ovs to ovn

[Jakub Libosvar]

After migration is finished, geneve vni allocations are all empty. It means newly created networks may have same segmentation id as existing migrated networks.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/wallaby
Review: https://review.opendev.org/c/openstack/neutron/+/791451

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/neutron/+/791451
Committed: https://opendev.org/openstack/neutron/commit/a54ef341b5b94925a39dcb1f1a53f1a88cccb0ef
Submitter: "Zuul (22348)"
Branch: stable/wallaby

commit a54ef341b5b94925a39dcb1f1a53f1a88cccb0ef
Author: Jakub Libosvar <email address hidden>
Date: Wed Mar 31 08:36:13 2021 +0000

    ovn-migration: Introduce migrate mode to DB sync tool

    The new "migrate" mode for the DB sync utility changes DB contents as
    follows:

     - it changes vxlan networks to Geneve, including its allocation in
       order to avoid future collisions when creating new geneve networks
     - it removes settings from ports' vif_details that are no longer
       needed, such as hybrid plugging or bridge_name for the trunk bridges
     - it sets profile for subports - OVN doesn't use trunk_details but port
       profile to store data about trunk. Subports have tag and parent_name
       fileds.

    Previously, the vxlan to Geneve change was done via ansible role. The
    tasks in the role were replaced by the script therefore the role is
    removed.

    Closes-bug: #1928465

    Conflicts:
            tools/ovn_migration/tripleo_environment/playbooks/roles/prepare-controllers/defaults/main.yml
            tools/ovn_migration/tripleo_environment/playbooks/roles/prepare-controllers/tasks/main.yml

    Signed-off-by: Jakub Libosvar <email address hidden>
    Change-Id: I29a39108d9fddb30050ec63a1cdf6bba0400e136
    (cherry picked from commit ae78e812d13aa5d0c820397b4b633123b6ff0e34)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/neutron 18.1.0 release.