demo-18b

demo-18b/dev/dev.tf

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+module "main-vpc" {
+  source = "../modules/vpc"
+  ENV = "dev"
+  AWS_REGION = "${var.AWS_REGION}"
+}
+
+module "instances" {
+  source = "../modules/instances"
+  ENV = "dev"
+  VPC_ID = "${module.main-vpc.vpc_id}"
+  PUBLIC_SUBNETS = ["${module.main-vpc.public_subnets}"]
+}

demo-18b/dev/provider.tf

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+provider "aws" {
+  region  = "${var.AWS_REGION}"
+}

demo-18b/dev/vars.tf

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+variable "AWS_REGION" {
+  default = "eu-west-1"
+}

demo-18b/modules/instances/instance.tf

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+variable "ENV" {}
+variable "INSTANCE_TYPE" { default = "t2.micro" }
+variable "PUBLIC_SUBNETS" { type = "list" }
+variable "VPC_ID" {}
+variable "PATH_TO_PUBLIC_KEY" { default = "mykey.pub" }
+
+data "aws_ami" "ubuntu" {
+  most_recent = true
+
+  filter {
+    name   = "name"
+    values = ["ubuntu/images/hvm-ssd/ubuntu-trusty-14.04-amd64-server-*"]
+  }
+
+  filter {
+    name   = "virtualization-type"
+    values = ["hvm"]
+  }
+
+  owners = ["099720109477"] # Canonical
+}
+
+resource "aws_instance" "instance" {
+  ami           = "${data.aws_ami.ubuntu.id}"
+  instance_type = "${var.INSTANCE_TYPE}"
+
+  # the VPC subnet
+  subnet_id = "${var.PUBLIC_SUBNETS[0]}"
+
+  # the security group
+  vpc_security_group_ids = ["${aws_security_group.allow-ssh.id}"]
+
+  # the public SSH key
+  key_name = "${aws_key_pair.mykeypair.key_name}"
+
+  tags {
+    Name = "instance-${var.ENV}"
+    Environmnent = "${var.ENV}"
+  }
+}
+
+resource "aws_security_group" "allow-ssh" {
+  vpc_id      = "${var.VPC_ID}"
+  name        = "allow-ssh-${var.ENV}"
+  description = "security group that allows ssh and all egress traffic"
+
+  egress {
+    from_port   = 0
+    to_port     = 0
+    protocol    = "-1"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+
+  ingress {
+    from_port   = 22
+    to_port     = 22
+    protocol    = "tcp"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+
+  tags {
+    Name = "allow-ssh"
+    Environmnent = "${var.ENV}"
+  }
+}
+
+resource "aws_key_pair" "mykeypair" {
+  key_name   = "mykeypair-${var.ENV}"
+  public_key = "${file("${path.root}/${var.PATH_TO_PUBLIC_KEY}")}"
+}

demo-18b/modules/vpc/vpc.tf

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+variable "ENV" {}
+variable "AWS_REGION" {}
+
+module "main-vpc" {
+  source = "terraform-aws-modules/vpc/aws"
+
+  name = "vpc-prod-${var.ENV}"
+  cidr = "10.0.0.0/16"
+
+  azs             = ["${var.AWS_REGION}a", "${var.AWS_REGION}b", "${var.AWS_REGION}c"]
+  private_subnets = ["10.0.1.0/24", "10.0.2.0/24", "10.0.3.0/24"]
+  public_subnets  = ["10.0.101.0/24", "10.0.102.0/24", "10.0.103.0/24"]
+
+  enable_nat_gateway = false
+  enable_vpn_gateway = false
+
+  tags = {
+    Terraform   = "true"
+    Environment = "${var.ENV}"
+  }
+}
+
+output "vpc_id" {
+  description = "The ID of the VPC"
+  value       = "${module.main-vpc.vpc_id}"
+}
+output "private_subnets" {
+  description = "List of IDs of private subnets"
+  value       = ["${module.main-vpc.private_subnets}"]
+}
+
+output "public_subnets" {
+  description = "List of IDs of public subnets"
+  value       = ["${module.main-vpc.public_subnets}"]
+}

demo-18b/prod/prod.tf

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+module "main-vpc" {
+  source = "../modules/vpc"
+  ENV = "prod"
+  AWS_REGION = "${var.AWS_REGION}"
+}
+
+module "instances" {
+  source = "../modules/instances"
+  ENV = "prod"
+  VPC_ID = "${module.main-vpc.vpc_id}"
+  PUBLIC_SUBNETS = ["${module.main-vpc.public_subnets}"]
+}

demo-18b/prod/provider.tf

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+provider "aws" {
+  region  = "${var.AWS_REGION}"
+}

demo-18b/prod/vars.tf

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+variable "AWS_REGION" {
+  default = "eu-west-1"
+}