Elastic Load Balancing both internal and internet-facing

Question

We are trying to use Elastic Load Balancing in AWS with auto-scaling so we can scale in and out as needed.

Our application consists of several small

Answer 1

I disagree with @MattHouser answer. Actually, in a VPC, your ELB have all its internal interfaces listed in Network Interfaces with Public IP AND Primary private IP. I've tested the private IP of my public ELB and it's working exactly like the external one.

The problem is : theses IPs are not listed anywhere in a up to date manner like on a private ELB DNS. So you have to do it by yourself.

I've made a little POC script on this, with an internal Route53 hosted zone : https://gist.github.com/darylounet/3c6253c60b7dc52da927b80a0ae8d428