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[OpenStack Infra <1951872@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/neutron/+/822294
Committed: https://opendev.org/openstack/neutron/commit/5b597d6e4ee647502d3f2aecd46de63f409317b4
Submitter: "Zuul (22348)"
Branch:    master

commit 5b597d6e4ee647502d3f2aecd46de63f409317b4
Author: yatinkarel <ykarel@xxxxxxxxxx>
Date:   Mon Dec 20 13:07:25 2021 +0530

    [OVN] Add reverse DNS records
    
    PTR DNS requests support is available since
    ovn-21.06.0[1].
    
    This patch adds/removes required enteries for each ip
    address of the port in DNS NB table, For example for ip
    addresses "10.0.0.4 fd5a:cdd8:f382:0:f816:3eff:fe5b:bb6"
    and fqdn "vm1.ovn.test." following enteries are added:-
    - 4.0.0.10.in-addr.arpa="vm1.ovn.test"
    - 6.b.b.0.b.5.e.f.f.f.e.3.6.1.8.f.0.0.0.0.2.8.3.f.8.d.d.c.a.5.d.f.ip6.arpa="vm1.ovn.test"
    
    [1] https://github.com/ovn-org/ovn/commit/82a4e44
    
    Closes-Bug: #1951872
    Change-Id: If03a2ad2475cdb390c4388d6869cd0b2a0555eb7


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

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https://bugs.launchpad.net/bugs/1951872

Title:
  OVN: Missing reverse DNS for instances

Status in neutron:
  Fix Released

Bug description:
  When using OVN, reverse DNS for instances is not working. With dhcp-
  agent:

  ubuntu@vm1:~$ host 10.0.0.11 10.0.0.3
  Using domain server:
  Name: 10.0.0.3
  Address: 10.0.0.3#53
  Aliases: 

  11.0.0.10.in-addr.arpa domain name pointer vm3.openstackgate.local.

  With OVN:

  ubuntu@vm1:~$ host 10.0.0.11 8.8.8.8
  Using domain server:
  Name: 8.8.8.8
  Address: 8.8.8.8#53
  Aliases: 

  Host 11.0.0.10.in-addr.arpa. not found: 3(NXDOMAIN)

  Expected result: Get the same answer as with ML2/OVS.

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