Application Load Balancer to API Gateway Private Rest API

Cross Account Private API Access via Public Application Load Balancer.

This sample pattern allows users from one account to access their Private REST APIs present in another account over the internet.

This facilitates abstraction of network resources (like load balancers, virtual private clouds, endpoints) & application resources (like lambda, api gateway) into separate individual management accounts.

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 4.11.0"
    }
  }
}

variable "region" {}
variable "custom_domain_name_prefix" {}
variable "domain_name" {}

# Configure the AWS Provider
provider "aws" {
 profile = "default"
 region  = "${var.region}"
}
 
#Production account
provider "aws" {
 profile = "crossaccount"
 region  = "${var.region}"
 alias   = "crossaccount"
}

data "aws_caller_identity" "current" {
  provider = aws.crossaccount
}