What's the best way of implementing multi-region clusters with private networks?

[BlakeB415]

I'm wondering what the best way to implement multi-region clusters is.

We want to eliminate public IPv4 on each node and use NAT completely as well.

This is what we came up with initially. However, how this factors into pod networking is unknown to me.

Then we came across this https://cilium.io/blog/2019/03/12/clustermesh/ and wondered if this might be better in the long run where each region is its own cluster.

I'm still not exactly sure how this would work with this module as it seems to set up routes for the pod subnets on the private network. I assume this also means that the routing to each pod is done natively on the private net and not with vxlan?

Continuing discussion here: #785