Added tags to subnets for cloud-provider option in K8S

main.tf

@@ -31,6 +31,10 @@ variable "enable_dns_support" {
   default     = true
 }
 
+variable "kubernetes_cluster" {
+  description = "The name of the Kubernetes Cluster to tag the public and private subnets with, this is so that the cloud-provider function in Kubernetes can function."
+}
+
 resource "aws_vpc" "mod" {
   cidr_block           = "${var.cidr}"
   enable_dns_hostnames = "${var.enable_dns_hostnames}"
@@ -51,7 +55,9 @@ resource "aws_subnet" "public" {
   map_public_ip_on_launch = true
 
   tags {
-    Name = "${var.name}.public.${element(var.availability_zones, count.index)}"
+    Name                     = "${var.name}.public.${element(var.availability_zones, count.index)}"
+    KubernetesCluster        = "${var.kubernetes_cluster}"
+    "kubernetes.io/role/elb" = "kubernetes.io/role/elb"
   }
 }
 
@@ -64,7 +70,9 @@ resource "aws_subnet" "private" {
   count             = "${length(var.private_subnets)}"
   
   tags {
-    Name = "${var.name}.private.${element(var.availability_zones, count.index)}"
+    Name                              = "${var.name}.private.${element(var.availability_zones, count.index)}"
+    KubernetesCluster                 = "${var.kubernetes_cluster}"
+    "kubernetes.io/role/internal-elb" = "kubernetes.io/role/internal-elb"
   }
 }