initial commit

environments/dev/main.tf

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+module "dev" {
+    source = "../../modules/blog"
+
+    environment = {
+        name            = "dev"
+        network_prefix  = "10.1"
+    }
+
+    min_size = 1
+    max_size = 1
+}

environments/qa/main.tf

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+module "qa" {
+    source = "../../modules/blog"
+
+    environment {
+        name            = "qa"
+        network_prefix  = "10.2"
+    }
+
+    min_size = 1
+    max_size = 1
+}

environments/qa/output.tf

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+output "environment_url" {
+    value = module.qa.environment_url
+}

environments/qa/provider.tf

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+terraform {
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+    }
+  }
+}
+
+provider "aws" {
+  region  = "us-west-2"
+}

modules/blog/main.tf

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+data "aws_ami" "app_ami" {
+  most_recent = true
+
+  filter {
+    name   = "name"
+    values = [var.ami_filter.name]
+  }
+
+  filter {
+    name   = "virtualization-type"
+    values = ["hvm"]
+  }
+
+  owners = [var.ami_filter.owner] 
+}
+
+module "blog_vpc" {
+  source = "terraform-aws-modules/vpc/aws"
+
+  name = var.environment.name
+  cidr = "${var.environment.network_prefix}.0.0/16"
+
+  azs             = ["us-west-2a","us-west-2b","us-west-2c"]
+  public_subnets  = ["${var.environment.network_prefix}.101.0/24", "${var.environment.network_prefix}.102.0/24", "${var.environment.network_prefix}.103.0/24"]
+
+
+  tags = {
+    Terraform = "true"
+    Environment = var.environment.name
+  }
+}
+
+module "blog_sg" {
+  source  = "terraform-aws-modules/security-group/aws"
+  version = "4.13.0"
+
+  vpc_id  = module.blog_vpc.vpc_id
+  name    = "${var.environment.name}-blog"
+  ingress_rules = ["https-443-tcp","http-80-tcp"]
+  ingress_cidr_blocks = ["0.0.0.0/0"]
+  egress_rules = ["all-all"]
+  egress_cidr_blocks = ["0.0.0.0/0"]
+}
+
+module "blog_alb" {
+  source = "terraform-aws-modules/alb/aws"
+
+  name    = "${var.environment.name}-blog-alb"
+  vpc_id  = module.blog_vpc.vpc_id
+  subnets = module.blog_vpc.public_subnets
+
+  security_groups = [module.blog_sg.security_group_id]
+
+  listeners = {
+    blog-http = {
+      port     = 80
+      protocol = "HTTP"
+      forward = {
+        target_group_arn = aws_lb_target_group.blog.arn
+      }
+    }
+  }
+
+  tags = {
+    Environment = var.environment.name
+  }
+}
+
+resource "aws_lb_target_group" "blog" {
+  name     = "${var.environment.name}-blog"
+  port     = 80
+  protocol = "HTTP"
+  vpc_id   = module.blog_vpc.vpc_id
+}
+
+module "blog_autoscaling" {
+  source  = "terraform-aws-modules/autoscaling/aws"
+  version = "9.2.1"
+  name = "${var.environment.name}-blog"
+
+  min_size = var.min_size
+  max_size = var.max_size
+
+  vpc_zone_identifier = module.blog_vpc.public_subnets
+
+  launch_template_name = "${var.environment.name}-blog"
+  security_groups = [module.blog_sg.security_group_id]
+  instance_type   = var.instance_type
+  image_id        = data.aws_ami.app_ami.id
+
+  traffic_source_attachments = {
+    "${var.environment.name}-blog_alb" = {
+      traffic_source_identifier = aws_lb_target_group.blog.arn
+    }
+  }
+
+}

modules/blog/outputs.tf

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+output "environment_url" {
+    value = module.blog_alb.dns_name
+}

modules/blog/variables.tf

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+variable "instance_type" {
+  description = "Type of EC2 instance to provision"
+  default     = "t3.nano"
+}
+
+variable "ami_filter" {
+  description = "Name filter and owner for AMI"
+  type = object ({
+    name  = string
+    owner = string
+  })
+
+  default  =  {
+    name   = "bitnami-tomcat-*-x86_64-hvm-ebs-nami"
+    owner  = "979382823631" # Bitnami
+  }  
+}
+
+variable "environment" {
+  description = "Development environment"
+  type = object ({
+    name           = string 
+    network_prefix = string
+  })
+  default = {
+    name           = "dev"
+    network_prefix = "10.0"
+  }
+
+}
+
+variable "min_size" {
+  description = "Minimum number of instances in the ASG"
+  default     = 1
+}
+
+variable "max_size" {
+  description = "Maximum number of instances in the ASG"
+  default     = 2
+}
+