Open Stack

Dear list,

I'm in the process of setting up an Openstack installation for internal
use. The environment consists of these nodes:
- 1 controller node
- 2 compute nodes

My goal is now to get Designate working for internal domain resolution
paired with automatic record creation from Nova/Neutron.
The steps I did so far:
- Installed and configured Designate
(https://docs.openstack.org/designate/ussuri/install/install-ubuntu.html)
and Designate dashboard for Horizon
(https://docs.openstack.org/designate-dashboard/ussuri/install/index.html)
- Adjusted handler "neutron_floatingip"

    [handler:neutron_floatingip]
    notification_topics = notifications_designate
    control_exchange = neutron
    formatv4 = '%(octet0)s-%(octet1)s-%(octet2)s-%(octet3)s.%(zone)s'
    formatv4 = '%(hostname)s.%(project)s.%(zone)s'
    formatv4 = '%(hostname)s.%(zone)s'

- Adjusted handler "nova_fixed"

    [handler:nova_fixed]
    notification_topics = notifications_designate
    control_exchange = nova
    formatv4 = '%(octet0)s-%(octet1)s-%(octet2)s-%(octet3)s.%(zone)s'
    formatv4 = '%(hostname)s.%(project)s.%(zone)s'
    formatv4 = '%(hostname)s.%(zone)s'

- Installed Designate-Sink and configured notification_handlers

    [service:sink]
    workers = 5
    enabled_notification_handlers = "nova_fixed, neutron_floatingip"

- Added notification topic "notifications_designate" to nova.conf and
neutron.conf

Let's say I have one additional domain configured in Openstack next to
the default domain: "domain1.internal". So I logged in to the new domain
in Horizon, created a few networks, created the new zone record
"domain1.internal." and started a new instance called "test-vm".

Expectations:
Nova creates the instance, Neutron creates the required network port and
Designate Sink receives the "Port created" notification via the
"notifications_designate" topic

Reality:
Nova creates the instance, Neutron creates the required network port but
Designate Sink does nothing. In the designate-api.log I can see the
creation of the "domain1.internal." zone but the designate-sink.log
stays empty

    2020-10-20 08:29:19.573 3524893 INFO
    designate.api.v2.controllers.zones
    [req-31b7fa68-6621-4044-985e-f90c87dd8cae - - - - -] Created <Zone
    id:'d7c015ec-5079-450b-866d-f04042221d80' type:'PRIMARY'
    name:'domain1.internal.'
    pool_id:'794ccc2c-d751-44fe-b57f-8894c9f5c842' serial:'1603182558'
    action:'CREATE' status:'PENDING'>

My question is: What piece of configuration did I miss? Is my desired
configuration even possible at all? What I basically want to achieve is:
- Create an instance using nova
- The instance name automatically get's published in all(?) DNS zones of
the project/Openstack domain
- Instances can resolve other instance names out of this DNS zone

Thank you very much in advance and regards,
Daniel Heitepriem

P.S.: Can you please keep my in CC as I'm not subscribed to the list
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