Doc needed for configuring neutron AZs for edge

[Greg Rakauskas]

A downstream neutron user reported:

It's not clear how to use this feature.

is it only for DCN? if not, is it necessary to create Composable Role per node to put this node in a specific AZ?

Reported by: rhn-support-dsilvaju

https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/16.2/html/networking_guide/use-azs-make-network-nodes-ha_rhosp-network

[Greg Rakauskas (gregraka)]

Downstream neutron AZ doc bug: https://bugzilla.redhat.com/show_bug.cgi?id=2012256

[Greg Rakauskas (gregraka)]

From the designate-edge point of view:

Problem space:

We want to use the upstream neutron doc to understand how to configure dnsmasq to hit a local resolver at an edge site.

In this neutron doc topic:

https://docs.openstack.org/neutron/yoga/admin/config-dns-res.html#case-2a-queries-are-forwarded-to-an-explicitly-configured-set-of-dns-resolvers

...you can create a list of one or more resolvers for dnsmasq to use for tenant networks. (Designate uses unbound in downstream RHOSP.) The problem is, that configuration doesn't have a concept of the AZ or edge site. Therefore, setting one list of resolvers for all of neutron might be a problem for some OSP sites that also use edge deployments.

[Lajos Katona (lajos-katona)]

Thanks, just for reference the PTG etherpad as we discussed this topic:
https://etherpad.opendev.org/p/neutron-zed-ptg#L286