Aws-load-balancer-controller: Add Support for Route53 Delegated Zones

[jcderr]

We use delegated zones for each "stack" of our software. However, the alb-ingress-controller does not respect these.

We might have, for instance:

  - host: auth.some-env.some-corp.com

Currently, it will make an auth.some-env record in the some-corp.com zone, even if the some-env.some-corp.com zone exists. Instead, it should make the record in the delegated zone.

[jcderr]

Would it be preferred to have an annotation (alb.ingress.kubernetes.io/route53-zone?) to control this?

[joshrosso]

Hi @jcderr

That would certainly be a possibly. Have you used https://github.com/kubernetes-incubator/external-dns mentioned in #9 by chance?

Based on suggestions and this controller's primary use, it seems decoupling route 53 out of this controller altogether is a good move.

In other words, does the aforementioned project handle delegated zones the way you require?

[jcderr]

external-dns looks like a winner.