main.tf: Make number of instances created configurable, defaulting to 1 (terraform-aws-modules#64)

Author: jjardon

examples/volume-attachment/main.tf

@@ -49,7 +49,7 @@ module "security_group" {
 module "ec2" {
  source = "../../"
 
- instance_count = 1
+ instance_count = "${var.instances_number}"
 
  name = "example-with-ebs"
  ami = "${data.aws_ami.amazon_linux.id}"
@@ -60,12 +60,16 @@ module "ec2" {
 }
 
 resource "aws_volume_attachment" "this_ec2" {
+ count = "${var.instances_number}"
+
  device_name = "/dev/sdh"
- volume_id = "${aws_ebs_volume.this.id}"
- instance_id = "${module.ec2.id[0]}"
+ volume_id = "${aws_ebs_volume.this.*.id[count.index]}"
+ instance_id = "${module.ec2.id[count.index]}"
 }
 
 resource "aws_ebs_volume" "this" {
- availability_zone = "${module.ec2.availability_zone[0]}"
+ count = "${var.instances_number}"
+
+ availability_zone = "${module.ec2.availability_zone[count.index]}"
  size = 1
 }

examples/volume-attachment/outputs.tf

@@ -1,19 +1,14 @@
-output "instance_id" {
- description = "EC2 instance ID"
- value = "${module.ec2.id[0]}"
-}
-
-output "instance_public_dns" {
- description = "Public DNS name assigned to the EC2 instance"
- value = "${module.ec2.public_dns[0]}"
+output "instances_public_ips" {
+ description = "Public IPs assigned to the EC2 instance"
+ value = "${module.ec2.public_ip}"
 }
 
 output "ebs_volume_attachment_id" {
  description = "The volume ID"
- value = "${aws_volume_attachment.this_ec2.volume_id}"
+ value = "${aws_volume_attachment.this_ec2.*.volume_id}"
 }
 
 output "ebs_volume_attachment_instance_id" {
  description = "The instance ID"
- value = "${aws_volume_attachment.this_ec2.instance_id}"
+ value = "${aws_volume_attachment.this_ec2.*.instance_id}"
 }

examples/volume-attachment/variables.tf

@@ -0,0 +1,3 @@
+variable "instances_number" {
+ default = 1
+}