added VPC ID var for IGW

terraform/aws/new-igw/main.tf

@@ -1,7 +1,7 @@
-resource "aws_internet_gateway" "gw" {
-  vpc_id = aws_vpc.main.id
+resource "aws_internet_gateway" "demo_gw" {
+  vpc_id = var.demo_vpc_id
 
-  tags = {
-    Name = "main"
+  tags {
+    tool = "terraform"
   }
 }

terraform/aws/new-igw/variables.tf

@@ -0,0 +1,6 @@
+// note: this variable will be fed with coreos_vpc VPC ID which can be found at terraform/aws/new-vpc/main.tf
+variable "demo_vpc_id" {
+  type = "string"
+  default = ""
+  description = "AWS coreos_vpc VPC ID"
+}