Added placement groups

README.md

@@ -135,6 +135,7 @@ data "aws_ami" "ubuntu-xenial" {
 | credit\_specification | List of credit specification of instances |
 | id | List of IDs of instances |
 | key\_name | List of key names of instances |
+| placement\_group | List of placement groups of instances |
 | primary\_network\_interface\_id | List of IDs of the primary network interface of instances |
 | private\_dns | List of private DNS names assigned to the instances. Can only be used inside the Amazon EC2, and only available if you've enabled DNS hostnames for your VPC |
 | private\_ip | List of private IP addresses assigned to the instances |

examples/basic/README.md

@@ -29,6 +29,7 @@ Note that this example may create resources which can cost money. Run `terraform
 | ids\_t2 | List of IDs of t2-type instances |
 | instance\_id | EC2 instance ID |
 | instance\_public\_dns | Public DNS name assigned to the EC2 instance |
+| placement\_group | List of placement group |
 | public\_dns | List of public DNS names assigned to the instances |
 | tags | List of tags |
 | vpc\_security\_group\_ids | List of VPC security group ids assigned to the instances |

examples/basic/main.tf

@@ -37,7 +37,7 @@ data "aws_ami" "amazon_linux" {
 
 module "security_group" {
   source  = "terraform-aws-modules/security-group/aws"
-  version = "2.7.0"
+  version = "~> 2.0"
 
   name        = "example"
   description = "Security group for example usage with EC2 instance"
@@ -53,6 +53,11 @@ resource "aws_eip" "this" {
   instance = "${module.ec2.id[0]}"
 }
 
+resource "aws_placement_group" "web" {
+  name     = "hunky-dory-pg"
+  strategy = "cluster"
+}
+
 module "ec2" {
   source = "../../"
 
@@ -64,6 +69,7 @@ module "ec2" {
   subnet_id                   = "${element(data.aws_subnet_ids.all.ids, 0)}"
   vpc_security_group_ids      = ["${module.security_group.this_security_group_id}"]
   associate_public_ip_address = true
+  placement_group             = "${aws_placement_group.web.id}"
 
   root_block_device = [{
     volume_type = "gp2"

examples/basic/outputs.tf

@@ -23,6 +23,11 @@ output "tags" {
   value       = "${module.ec2.tags}"
 }
 
+output "placement_group" {
+  description = "List of placement group"
+  value       = "${module.ec2.placement_group}"
+}
+
 output "instance_id" {
   description = "EC2 instance ID"
   value       = "${module.ec2.id[0]}"

outputs.tf

@@ -7,6 +7,7 @@ locals {
   this_primary_network_interface_id = "${compact(concat(coalescelist(aws_instance.this.*.primary_network_interface_id, aws_instance.this_t2.*.primary_network_interface_id), list("")))}"
   this_private_dns                  = "${compact(concat(coalescelist(aws_instance.this.*.private_dns, aws_instance.this_t2.*.private_dns), list("")))}"
   this_private_ip                   = "${compact(concat(coalescelist(aws_instance.this.*.private_ip, aws_instance.this_t2.*.private_ip), list("")))}"
+  this_placement_group              = "${compact(concat(coalescelist(aws_instance.this.*.placement_group, aws_instance.this_t2.*.placement_group), list("")))}"
   this_security_groups              = "${compact(concat(coalescelist(flatten(aws_instance.this.*.security_groups), flatten(aws_instance.this_t2.*.security_groups)), list("")))}"
   this_vpc_security_group_ids       = "${compact(concat(coalescelist(flatten(aws_instance.this.*.vpc_security_group_ids), flatten(aws_instance.this_t2.*.vpc_security_group_ids)), list("")))}"
   this_subnet_id                    = "${compact(concat(coalescelist(aws_instance.this.*.subnet_id, aws_instance.this_t2.*.subnet_id), list("")))}"
@@ -25,11 +26,10 @@ output "availability_zone" {
   value       = ["${local.this_availability_zone}"]
 }
 
-// GH issue: https://github.com/terraform-aws-modules/terraform-aws-ec2-instance/issues/8
-//output "placement_group" {
-//  description = "List of placement groups of instances"
-//  value       = ["${element(concat(aws_instance.this.*.placement_group, list("")), 0)}"]
-//}
+output "placement_group" {
+  description = "List of placement groups of instances"
+  value       = ["${local.this_placement_group}"]
+}
 
 output "key_name" {
   description = "List of key names of instances"