IPv6 and IPv4 Configuration on Installation

[mpstefan]

As a user of NGF with an IPv6 enabled Kubernetes cluster
I want the ability to enable IP versions for NGF on installation
So that I can enable IPv6 in NGF and use it within my cluster.

Acceptance

• The user can configure NGF to use IPv4 and/or IPv6 on installation.
• The installation documentation is updated to include IP version instructions.

[brianehlert]

Suggestion: simply create an NGINX port listener on both IP families and default that way. Dual stack has been a thing for a decade.
Unless Gateway API is opinionated about the ip address space.
This is the simplest way to solve this problem.
This is how NIC approached this, and the only hitch we had was running on Pivotal Cloud Foundry (and one other similar platform) that disabled IPv6 at the node level and prevented the NIC container from having an IPv6 stack at all.

[ciarams87]

See nginx/kubernetes-ingress#2576 and nginx/kubernetes-ingress#3040 for NIC IPv6 support

[sjberman]

Closed by #2190