Merge pull request #202 from terraform-aws-modules/ssm_and_ec2_vpc_endpoints

Added SSM and EC2 VPC endpoints

Author: antonbabenko

README.md

@@ -28,6 +28,9 @@ Note that this example may create resources which can cost money (AWS Elastic IP
 | private\_subnets | List of IDs of private subnets |
 | public\_subnets | List of IDs of public subnets |
 | redshift\_subnets | List of IDs of redshift subnets |
+| vpc\_endpoint\_ssm\_dns\_entry | The DNS entries for the VPC Endpoint for SSM. |
+| vpc\_endpoint\_ssm\_id | The ID of VPC endpoint for SSM |
+| vpc\_endpoint\_ssm\_network\_interface\_ids | One or more network interfaces for the VPC Endpoint for SSM. |
 | vpc\_id | The ID of the VPC |
 
 <!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->

examples/complete-vpc/README.md

@@ -2,6 +2,11 @@ provider "aws" {
   region = "eu-west-1"
 }
 
+data "aws_security_group" "default" {
+  name   = "default"
+  vpc_id = "${module.vpc.vpc_id}"
+}
+
 module "vpc" {
   source = "../../"
 
@@ -19,18 +24,35 @@ module "vpc" {
 
   create_database_subnet_group = false
 
+  enable_dns_hostnames = true
+  enable_dns_support   = true
+
   enable_nat_gateway = true
   single_nat_gateway = true
 
   enable_vpn_gateway = true
 
-  enable_s3_endpoint       = true
-  enable_dynamodb_endpoint = true
-
   enable_dhcp_options              = true
   dhcp_options_domain_name         = "service.consul"
   dhcp_options_domain_name_servers = ["127.0.0.1", "10.10.0.2"]
 
+  # VPC endpoint for S3
+  enable_s3_endpoint = true
+
+  # VPC endpoint for DynamoDB
+  enable_dynamodb_endpoint = true
+
+  # VPC endpoint for SSM
+  enable_ssm_endpoint              = true
+  ssm_endpoint_private_dns_enabled = true
+  ssm_endpoint_security_group_ids  = ["${data.aws_security_group.default.id}"]
+
+  //  ssm_endpoint_subnet_ids = ["..."]
+
+  # VPC Endpoint for EC2
+  enable_ec2_endpoint              = true
+  ec2_endpoint_private_dns_enabled = true
+  ec2_endpoint_security_group_ids  = ["${data.aws_security_group.default.id}"]
   tags = {
     Owner       = "user"
     Environment = "staging"

examples/complete-vpc/main.tf

@@ -40,3 +40,37 @@ output "nat_public_ips" {
   description = "List of public Elastic IPs created for AWS NAT Gateway"
   value       = ["${module.vpc.nat_public_ips}"]
 }
+
+# VPC endpoints
+output "vpc_endpoint_ssm_id" {
+  description = "The ID of VPC endpoint for SSM"
+  value       = "${module.vpc.vpc_endpoint_ssm_id}"
+}
+
+output "vpc_endpoint_ssm_network_interface_ids" {
+  description = "One or more network interfaces for the VPC Endpoint for SSM."
+  value       = ["${module.vpc.vpc_endpoint_ssm_network_interface_ids}"]
+}
+
+output "vpc_endpoint_ssm_dns_entry" {
+  description = "The DNS entries for the VPC Endpoint for SSM."
+  value       = ["${module.vpc.vpc_endpoint_ssm_dns_entry}"]
+}
+
+//
+//# VPC endpoints
+//output "vpc_endpoint_ec2_id" {
+//  description = "The ID of VPC endpoint for EC2"
+//  value       = "${module.vpc.vpc_endpoint_ec2_id}"
+//}
+//
+//output "vpc_endpoint_ec2_network_interface_ids" {
+//  description = "One or more network interfaces for the VPC Endpoint for EC2."
+//  value = ["${module.vpc.vpc_endpoint_ec2_network_interface_ids}"]
+//}
+//
+//output "vpc_endpoint_ec2_dns_entry" {
+//  description = "The DNS entries for the VPC Endpoint for EC2."
+//  value = ["${module.vpc.vpc_endpoint_ec2_dns_entry}"]
+//}
+

examples/complete-vpc/outputs.tf

@@ -25,7 +25,7 @@ This will destroy any existing test resources, create the resources afresh, run
 
 | Name | Description | Type | Default | Required |
 |------|-------------|:----:|:-----:|:-----:|
-| region | - | string | `eu-west-1` | no |
+| region |  | string | `"eu-west-1"` | no |
 
 ## Outputs
 

examples/test_fixture/README.md

@@ -393,6 +393,48 @@ resource "aws_vpc_endpoint_route_table_association" "public_dynamodb" {
   route_table_id  = "${aws_route_table.public.id}"
 }
 
+######################
+# VPC Endpoint for SSM
+######################
+data "aws_vpc_endpoint_service" "ssm" {
+  count = "${var.create_vpc && var.enable_ssm_endpoint ? 1 : 0}"
+
+  service = "ssm"
+}
+
+resource "aws_vpc_endpoint" "ssm" {
+  count = "${var.create_vpc && var.enable_ssm_endpoint ? 1 : 0}"
+
+  vpc_id            = "${local.vpc_id}"
+  service_name      = "${data.aws_vpc_endpoint_service.ssm.service_name}"
+  vpc_endpoint_type = "Interface"
+
+  security_group_ids  = ["${var.ssm_endpoint_security_group_ids}"]
+  subnet_ids          = ["${coalescelist(var.ssm_endpoint_subnet_ids, aws_subnet.private.*.id)}"]
+  private_dns_enabled = "${var.ssm_endpoint_private_dns_enabled}"
+}
+
+######################
+# VPC Endpoint for EC2
+######################
+data "aws_vpc_endpoint_service" "ec2" {
+  count = "${var.create_vpc && var.enable_ec2_endpoint ? 1 : 0}"
+
+  service = "ec2"
+}
+
+resource "aws_vpc_endpoint" "ec2" {
+  count = "${var.create_vpc && var.enable_ec2_endpoint ? 1 : 0}"
+
+  vpc_id            = "${local.vpc_id}"
+  service_name      = "${data.aws_vpc_endpoint_service.ec2.service_name}"
+  vpc_endpoint_type = "Interface"
+
+  security_group_ids  = ["${var.ec2_endpoint_security_group_ids}"]
+  subnet_ids          = ["${coalescelist(var.ec2_endpoint_subnet_ids, aws_subnet.private.*.id)}"]
+  private_dns_enabled = "${var.ec2_endpoint_private_dns_enabled}"
+}
+
 ##########################
 # Route table association
 ##########################

main.tf

@@ -193,31 +193,11 @@ output "igw_id" {
   value       = "${element(concat(aws_internet_gateway.this.*.id, list("")), 0)}"
 }
 
-output "vpc_endpoint_s3_id" {
-  description = "The ID of VPC endpoint for S3"
-  value       = "${element(concat(aws_vpc_endpoint.s3.*.id, list("")), 0)}"
-}
-
-output "vpc_endpoint_s3_pl_id" {
-  description = "The prefix list for the S3 VPC endpoint."
-  value       = "${element(concat(aws_vpc_endpoint.s3.*.prefix_list_id, list("")), 0)}"
-}
-
-output "vpc_endpoint_dynamodb_id" {
-  description = "The ID of VPC endpoint for DynamoDB"
-  value       = "${element(concat(aws_vpc_endpoint.dynamodb.*.id, list("")), 0)}"
-}
-
 output "vgw_id" {
   description = "The ID of the VPN Gateway"
   value       = "${element(concat(aws_vpn_gateway.this.*.id, aws_vpn_gateway_attachment.this.*.vpn_gateway_id, list("")), 0)}"
 }
 
-output "vpc_endpoint_dynamodb_pl_id" {
-  description = "The prefix list for the DynamoDB VPC endpoint."
-  value       = "${element(concat(aws_vpc_endpoint.dynamodb.*.prefix_list_id, list("")), 0)}"
-}
-
 output "default_vpc_id" {
   description = "The ID of the VPC"
   value       = "${element(concat(aws_default_vpc.this.*.id, list("")), 0)}"
@@ -278,6 +258,58 @@ output "default_vpc_main_route_table_id" {
 //  value       = "${element(concat(aws_default_vpc.this.*.ipv6_cidr_block, list("")), 0)}"
 //}
 
+# VPC Endpoints
+output "vpc_endpoint_s3_id" {
+  description = "The ID of VPC endpoint for S3"
+  value       = "${element(concat(aws_vpc_endpoint.s3.*.id, list("")), 0)}"
+}
+
+output "vpc_endpoint_s3_pl_id" {
+  description = "The prefix list for the S3 VPC endpoint."
+  value       = "${element(concat(aws_vpc_endpoint.s3.*.prefix_list_id, list("")), 0)}"
+}
+
+output "vpc_endpoint_dynamodb_id" {
+  description = "The ID of VPC endpoint for DynamoDB"
+  value       = "${element(concat(aws_vpc_endpoint.dynamodb.*.id, list("")), 0)}"
+}
+
+output "vpc_endpoint_dynamodb_pl_id" {
+  description = "The prefix list for the DynamoDB VPC endpoint."
+  value       = "${element(concat(aws_vpc_endpoint.dynamodb.*.prefix_list_id, list("")), 0)}"
+}
+
+output "vpc_endpoint_ssm_id" {
+  description = "The ID of VPC endpoint for SSM"
+  value       = "${element(concat(aws_vpc_endpoint.ssm.*.id, list("")), 0)}"
+}
+
+output "vpc_endpoint_ssm_network_interface_ids" {
+  description = "One or more network interfaces for the VPC Endpoint for SSM."
+  value       = "${flatten(aws_vpc_endpoint.ssm.*.network_interface_ids)}"
+}
+
+output "vpc_endpoint_ssm_dns_entry" {
+  description = "The DNS entries for the VPC Endpoint for SSM."
+  value       = "${flatten(aws_vpc_endpoint.ssm.*.dns_entry)}"
+}
+
+output "vpc_endpoint_ec2_id" {
+  description = "The ID of VPC endpoint for EC2"
+  value       = "${element(concat(aws_vpc_endpoint.ec2.*.id, list("")), 0)}"
+}
+
+output "vpc_endpoint_ec2_network_interface_ids" {
+  description = "One or more network interfaces for the VPC Endpoint for EC2"
+  value       = "${flatten(aws_vpc_endpoint.ec2.*.network_interface_ids)}"
+}
+
+output "vpc_endpoint_ec2_dns_entry" {
+  description = "The DNS entries for the VPC Endpoint for EC2."
+  value       = "${flatten(aws_vpc_endpoint.ec2.*.dns_entry)}"
+}
+
+# Static values (arguments)
 output "azs" {
   description = "A list of availability zones specified as argument to this module"
   value       = "${var.azs}"

outputs.tf

@@ -173,6 +173,46 @@ variable "enable_s3_endpoint" {
   default     = false
 }
 
+variable "enable_ssm_endpoint" {
+  description = "Should be true if you want to provision an SSM endpoint to the VPC"
+  default     = false
+}
+
+variable "ssm_endpoint_security_group_ids" {
+  description = "The ID of one or more security groups to associate with the network interface for SSM endpoint"
+  default     = []
+}
+
+variable "ssm_endpoint_subnet_ids" {
+  description = "The ID of one or more subnets in which to create a network interface for SSM endpoint. Only a single subnet within an AZ is supported. If omitted, private subnets will be used."
+  default     = []
+}
+
+variable "ssm_endpoint_private_dns_enabled" {
+  description = "Whether or not to associate a private hosted zone with the specified VPC for SSM endpoint"
+  default     = false
+}
+
+variable "enable_ec2_endpoint" {
+  description = "Should be true if you want to provision an EC2 endpoint to the VPC"
+  default     = false
+}
+
+variable "ec2_endpoint_security_group_ids" {
+  description = "The ID of one or more security groups to associate with the network interface for EC2 endpoint"
+  default     = []
+}
+
+variable "ec2_endpoint_private_dns_enabled" {
+  description = "Whether or not to associate a private hosted zone with the specified VPC for EC2 endpoint"
+  default     = false
+}
+
+variable "ec2_endpoint_subnet_ids" {
+  description = "The ID of one or more subnets in which to create a network interface for EC2 endpoint. Only a single subnet within an AZ is supported. If omitted, private subnets will be used."
+  default     = []
+}
+
 variable "map_public_ip_on_launch" {
   description = "Should be false if you do not want to auto-assign public IP on launch"
   default     = true