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Reviewed:  https://review.opendev.org/c/openstack/ovn-octavia-provider/+/898535
Committed: https://opendev.org/openstack/ovn-octavia-provider/commit/1661f3815c1518aa2e3f1761e33ec494be31d584
Submitter: "Zuul (22348)"
Branch:    master

commit 1661f3815c1518aa2e3f1761e33ec494be31d584
Author: Fernando Royo <froyo@xxxxxxxxxx>
Date:   Tue Oct 17 10:49:23 2023 +0200

    Add maintenance task to update entities on component start
    
    Some changes require updating the existing entities in a
    clear and transparent way for the user.
    
    This patch adds a mechanism to create separate tasks that
    can run periodically or just once in order to update or
    modify existing entities that require changes after a new
    patch or RFE.
    
    As an example, a first task has been included for updating
    existing OVN LB HM ports, changing their device_owner, and
    adding their device_id.
    
    Closes-Bug: 2038091
    Change-Id: I0d4feb1e5c128d5a768d1b87deb2dcb3ab6d1ea1


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

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https://bugs.launchpad.net/bugs/2038091

Title:
  [OVN] Manual sync misidentifies Octavia OVN Load Balancer health
  monitor port and deletes metadata port

Status in neutron:
  Fix Released

Bug description:
  
  Versions:
  Neutron: Stable/Yoga (from commit cbe514ecf6)
  Octavia: Stable/Yoga (from commit 5bf40c89)
  OVN: 22.09 - ovn22.09-22.09.0-31.el9s.x86_64

  Looks related to https://bugs.launchpad.net/neutron/+bug/2004238,
  however the fix from it is already applied.

  Doing manual ovn sync:
  neutron-ovn-db-sync-util --config-file=/etc/neutron/neutron.conf --config-file=/etc/neutron/plugins/ml2/ml2_conf.ini --ovn-neutron_sync_mode repair

  Misidentifies Octavia OVN Load Balancer Health Monitor Port and
  Deletes Metadata Port:

  47:2023-09-28 13:22:29.565 2053 WARNING neutron.plugins.ml2.drivers.ovn.mech_driver.ovsdb.ovn_db_sync [req-b037dd97-5936-4981-b0be-d4c88c6e806d - - - - -] Unnecessary DHCP port 77cc790a-1712-4fc2-b184-918842588a06 for network dd8dbcd7-0f6f-424f-aa2e-256630af44fd found in Neutron
  48:2023-09-28 13:22:29.565 2053 WARNING neutron.plugins.ml2.drivers.ovn.mech_driver.ovsdb.ovn_db_sync [req-b037dd97-5936-4981-b0be-d4c88c6e806d - - - - -] Deleting unnecessary DHCP port 77cc790a-1712-4fc2-b184-918842588a06 for network dd8dbcd7-0f6f-424f-aa2e-256630af44fd

  
  OVN LB health monitor port got .3 IP, and metadata uses it now as its port:

  ip netns exec ovnmeta-dd8dbcd7-0f6f-424f-aa2e-256630af44fd ip a
  1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
      inet 127.0.0.1/8 scope host lo
         valid_lft forever preferred_lft forever
      inet6 ::1/128 scope host
         valid_lft forever preferred_lft forever
  2: tapdd8dbcd7-01@if2868: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
      link/ether fa:16:3e:c9:12:45 brd ff:ff:ff:ff:ff:ff link-netnsid 0
      inet 169.254.169.254/32 brd 169.254.169.254 scope global tapdd8dbcd7-01
         valid_lft forever preferred_lft forever
      inet 192.168.100.3/24 brd 192.168.100.255 scope global tapdd8dbcd7-01
         valid_lft forever preferred_lft forever

  
  openstack port show  ovn-lb-hm-b7383d04-9220-48cd-bac9-3e2c53ad2d5f
  +-------------------------+------------------------------------------------------------------------------+
  | Field                   | Value                                                                        |
  +-------------------------+------------------------------------------------------------------------------+
  | admin_state_up          | UP                                                                           |
  | allowed_address_pairs   |                                                                              |
  | binding_host_id         |                                                                              |
  | binding_profile         |                                                                              |
  | binding_vif_details     |                                                                              |
  | binding_vif_type        | unbound                                                                      |
  | binding_vnic_type       | normal                                                                       |
  | created_at              | 2023-09-14T12:30:30Z                                                         |
  | data_plane_status       | None                                                                         |
  | description             |                                                                              |
  | device_id               |                                                                              |
  | device_owner            | network:distributed                                                          |
  | device_profile          | None                                                                         |
  | dns_assignment          | None                                                                         |
  | dns_domain              | None                                                                         |
  | dns_name                | None                                                                         |
  | extra_dhcp_opts         |                                                                              |
  | fixed_ips               | ip_address='192.168.100.3', subnet_id='b7383d04-9220-48cd-bac9-3e2c53ad2d5f' |
  | id                      | 2831bc8f-60e4-4a44-88e1-f3010cce3cbd                                         |
  | ip_allocation           | None                                                                         |
  | mac_address             | fa:16:3e:c9:12:45                                                            |
  | name                    | ovn-lb-hm-b7383d04-9220-48cd-bac9-3e2c53ad2d5f                               |
  | network_id              | dd8dbcd7-0f6f-424f-aa2e-256630af44fd                                         |
  | numa_affinity_policy    | None                                                                         |
  | port_security_enabled   | False                                                                        |
  | project_id              | e4529e5a687e4128af2935fb33cfa7c2                                             |
  | propagate_uplink_status | None                                                                         |
  | qos_network_policy_id   | None                                                                         |
  | qos_policy_id           | None                                                                         |
  | resource_request        | None                                                                         |
  | revision_number         | 1                                                                            |
  | security_group_ids      |                                                                              |
  | status                  | DOWN                                                                         |
  | tags                    |                                                                              |
  | trunk_details           | None                                                                         |
  | updated_at              | 2023-09-14T12:30:30Z                                                         |
  +-------------------------+------------------------------------------------------------------------------+

  
  Workaround - removed health monitor, readded manually ovnmeta port, restart metadata agents.

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