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[OpenStack Infra <1982569@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/neutron/+/886988
Committed: https://opendev.org/openstack/neutron/commit/82f2a21d1c9e27999d3fd7006a7ecf961039a370
Submitter: "Zuul (22348)"
Branch:    master

commit 82f2a21d1c9e27999d3fd7006a7ecf961039a370
Author: yatinkarel <ykarel@xxxxxxxxxx>
Date:   Mon Jun 26 21:17:48 2023 +0530

    [DHCP agent] Add route to OVN metadata port if exists
    
    When DHCP agent is deployed with ml2/ovn for baremetal
    ports, ovn metadata route is not added.
    
    This patch adds route via ovn metadata port if exists
    so baremetal nodes can fetch metadata.
    
    Closes-Bug: #1982569
    Related-Bug: https://bugzilla.redhat.com/show_bug.cgi?id=2213862
    Change-Id: I12e496d70bb6db707b317d0aeb6e4edd6c43571e


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

** Bug watch added: Red Hat Bugzilla #2213862
   https://bugzilla.redhat.com/show_bug.cgi?id=2213862

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https://bugs.launchpad.net/bugs/1982569

Title:
  [OVN] metadata does not work when using neutron-dhcp-agent for
  baremetal ports

Status in neutron:
  Fix Released

Bug description:
  When using neutron-dhcp-agent for Ironic/baremetal ports - DHCP injects a route to 169.254.169.254 via the routers ip.
  That's incorrect, because neutron ovn metadata agent is listening on a dedicated port (network:distributed).

  Example:

  # ip r l
  default via 10.209.0.1 dev eno1
  10.209.0.0/16 dev eno1 proto kernel scope link src 10.209.3.225
  169.254.169.254 via 10.209.0.1 dev eno1
  172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown

  ping 169.254.169.254
  PING 169.254.169.254 (169.254.169.254) 56(84) bytes of data.
  ^C
  --- 169.254.169.254 ping statistics ---
  2 packets transmitted, 0 received, 100% packet loss, time 1017ms

  # ip r d 169.254.169.254
  # ip r a 169.254.169.254 via 10.209.0.2

  # curl 169.254.169.254
  1.0
  2007-01-19
  2007-03-01
  2007-08-29
  2007-10-10
  2007-12-15
  2008-02-01
  2008-09-01
  2009-04-04

  OVN version: 21.12
  OVS version: 2.16.0
  OpenStack release: Wallaby

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