Shared state is working. Qeurying for default VPC.

k8s-nodes/modules/aws-network-existing/main.tf

@@ -0,0 +1,23 @@
+locals {
+  az-to-subnets = {
+    for s in data.aws_subnet.subnets : s.availability_zone => s.id...
+  }
+}
+
+data "aws_vpc" "default" {
+  tags = {
+    Name = var.default-vpc-name
+  }
+}
+
+data "aws_subnets" "subnet-ids" {
+  filter {
+    name = "vpc-id"
+    values = [data.aws_vpc.default.id]
+  }
+}
+
+data "aws_subnet" "subnets" {
+  for_each = toset(data.aws_subnets.subnet-ids.ids)
+  id = each.key
+}

k8s-nodes/modules/aws-network-existing/outputs.tf

@@ -0,0 +1,18 @@
+output "default-vpc" {
+  value = data.aws_vpc.default
+}
+
+output "subnets" {
+  description = "An array of all subnets in default-vpc."
+  value = data.aws_subnet.subnets
+}
+
+output "k8s-subnets" {
+  description = "An array of subnets to be used for k8s VMs. These subnets were chosen by selecting a single subnet from each availability_zone."
+  value = [for k,v in local.az-to-subnets : v[0]]
+}
+
+output "az-to-subnets" {
+  description = "A map of availability zone to array of subnets that are in thet availability zone."
+  value = local.az-to-subnets
+}

k8s-nodes/modules/aws-network-existing/variables.tf

@@ -0,0 +1,4 @@
+variable "default-vpc-name" {
+  description = "The name of the existing default VPC. This module will query AWS for a VPC with this name,"
+  default = "Managed VPC"
+}