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[OpenStack Infra <2118893@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/neutron/+/955998
Committed: https://opendev.org/openstack/neutron/commit/c68aa4cab3a1e933b9de6532e7058ba2f71af582
Submitter: "Zuul (22348)"
Branch:    master

commit c68aa4cab3a1e933b9de6532e7058ba2f71af582
Author: Rodolfo Alonso Hernandez <ralonsoh@xxxxxxxxxx>
Date:   Mon Jul 28 10:08:19 2025 +0000

    [OVN] OVN agents should clean up "Chassis_Private" tags
    
    The OVN Metadata agent and OVN agent can provide the same functionality
    (metadata). Both agents register different tags in the "Private_Chassis"
    configuration (external_ids):
    * OVN agent: 'neutron:ovn-neutron-agent-id',
      'neutron:ovn-neutron-agent-sb-cfg'
    * OVN Metadata agent: 'neutron:ovn-metadata-id',
      'neutron:ovn-metadata-sb-cfg'
    
    Although the OVN Metadata agent is deprecated (and marked for removal in
    2026.2), is still usable. This patch removes any pre-existing tag from
    the other agent when the process is started.
    
    Closes-Bug: #2118893
    Signed-off-by: Rodolfo Alonso Hernandez <ralonsoh@xxxxxxxxxx>
    Change-Id: I869e69a1cce78ee636c76554e498cb3ef43446f2


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/2118893

Title:
  [OVN] OVN agents should clean up "Chassis_Private" previous tags

Status in neutron:
  Fix Released

Bug description:
  Since [1], the "OVN agent" is replacing the "OVN Metadata agent".
  However, is still possible to switch from one to other, as long as
  both provide the same functionality (the "OVN agent" needs the
  metadata extension).

  Both agents register different tags in the "Private_Chassis" configuration (external_ids):
  * OVN agent: 'neutron:ovn-neutron-agent-id', 'neutron:ovn-neutron-agent-sb-cfg'
  * OVN Metadata agent: 'neutron:ovn-metadata-id', 'neutron:ovn-metadata-sb-cfg'

  In order to make both agents replaceable by the other, it is needed
  that each one is capable of deleting the tags left by the other in the
  "Chassis_Private.external_ids".

  NOTE: once we finish the migration to the "OVN agent", this
  functionality won't be needed anymore. However, in shake of
  compatibility, the "OVN agent" code will remain for some releases.

  [1]https://bugs.launchpad.net/neutron/+bug/2112313

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