From f98fb833561038c8944901752e0bc127e4183f5b Mon Sep 17 00:00:00 2001
From: Josh Samuelson <josh@joshsamuelson.com>
Date: Tue, 6 Sep 2022 22:04:09 -0700
Subject: [PATCH] 04_05 solutions

---
 dev/main.tf                      |  3 +
 providers.tf => dev/providers.tf |  0
 main.tf                          | 24 --------
 modules/blog/main.tf             | 95 ++++++++++++++++++++++++++++++++
 modules/blog/outputs.tf          |  3 +
 modules/blog/variables.tf        | 42 ++++++++++++++
 outputs.tf                       |  7 ---
 variables.tf                     |  4 --
 8 files changed, 143 insertions(+), 35 deletions(-)
 create mode 100644 dev/main.tf
 rename providers.tf => dev/providers.tf (100%)
 delete mode 100644 main.tf
 create mode 100644 modules/blog/main.tf
 create mode 100644 modules/blog/outputs.tf
 create mode 100644 modules/blog/variables.tf
 delete mode 100644 outputs.tf
 delete mode 100644 variables.tf

diff --git a/dev/main.tf b/dev/main.tf
new file mode 100644
index 0000000..4df5b9a
--- /dev/null
+++ b/dev/main.tf
@@ -0,0 +1,3 @@
+module "dev" {
+  source = "../modules/blog"
+}
diff --git a/providers.tf b/dev/providers.tf
similarity index 100%
rename from providers.tf
rename to dev/providers.tf
diff --git a/main.tf b/main.tf
deleted file mode 100644
index 9b32ce0..0000000
--- a/main.tf
+++ /dev/null
@@ -1,24 +0,0 @@
-data "aws_ami" "app_ami" {
-  most_recent = true
-
-  filter {
-    name   = "name"
-    values = ["bitnami-tomcat-*-x86_64-hvm-ebs-nami"]
-  }
-
-  filter {
-    name   = "virtualization-type"
-    values = ["hvm"]
-  }
-
-  owners = ["979382823631"] # Bitnami
-}
-
-resource "aws_instance" "web" {
-  ami           = data.aws_ami.app_ami.id
-  instance_type = "t3.nano"
-
-  tags = {
-    Name = "HelloWorld"
-  }
-}
diff --git a/modules/blog/main.tf b/modules/blog/main.tf
new file mode 100644
index 0000000..11e8866
--- /dev/null
+++ b/modules/blog/main.tf
@@ -0,0 +1,95 @@
+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"]
+
+  enable_nat_gateway = true
+
+  tags = {
+    Terraform = "true"
+    Environment = var.environment.name
+  }
+}
+
+
+module "blog_autoscaling" {
+  source  = "terraform-aws-modules/autoscaling/aws"
+  version = "6.5.2"
+
+  name = "blog"
+
+  min_size            = var.asg_min
+  max_size            = var.asg_max
+  vpc_zone_identifier = module.blog_vpc.public_subnets
+  target_group_arns   = module.blog_alb.target_group_arns
+  security_groups     = [module.blog_sg.security_group_id]
+  instance_type       = var.instance_type
+  image_id            = data.aws_ami.app_ami.id
+}
+
+module "blog_alb" {
+  source  = "terraform-aws-modules/alb/aws"
+  version = "~> 6.0"
+
+  name = "blog-alb"
+
+  load_balancer_type = "application"
+
+  vpc_id             = module.blog_vpc.vpc_id
+  subnets            = module.blog_vpc.public_subnets
+  security_groups    = [module.blog_sg.security_group_id]
+
+  target_groups = [
+    {
+      name_prefix      = "blog-"
+      backend_protocol = "HTTP"
+      backend_port     = 80
+      target_type      = "instance"
+    }
+  ]
+
+  http_tcp_listeners = [
+    {
+      port               = 80
+      protocol           = "HTTP"
+      target_group_index = 0
+    }
+  ]
+
+  tags = {
+    Environment = "dev"
+  }
+}
+
+module "blog_sg" {
+  source  = "terraform-aws-modules/security-group/aws"
+  version = "4.13.0"
+
+  vpc_id  = module.blog_vpc.vpc_id
+  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"]
+}
diff --git a/modules/blog/outputs.tf b/modules/blog/outputs.tf
new file mode 100644
index 0000000..9e7bbbc
--- /dev/null
+++ b/modules/blog/outputs.tf
@@ -0,0 +1,3 @@
+output "environment_url" {
+  value = module.blog_alb.lb_dns_name
+}
\ No newline at end of file
diff --git a/modules/blog/variables.tf b/modules/blog/variables.tf
new file mode 100644
index 0000000..c9dbbce
--- /dev/null
+++ b/modules/blog/variables.tf
@@ -0,0 +1,42 @@
+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 = "Deployment environment"
+
+  type        = object ({
+    name           = string
+    network_prefix = string
+  })
+  default = {
+    name           = "dev"
+    network_prefix = "10.0"
+  }
+}
+
+
+variable "asg_min" {
+  description = "Minimum instance count for the ASG"
+  default     = 1
+}
+
+variable "asg_max" {
+  description = "Maximum instance count for the ASG"
+  default     = 2
+}
diff --git a/outputs.tf b/outputs.tf
deleted file mode 100644
index b35171b..0000000
--- a/outputs.tf
+++ /dev/null
@@ -1,7 +0,0 @@
-#output "instance_ami" {
-#  value = aws_instance.web.ami
-#}
-
-#output "instance_arn" {
-#  value = aws_instance.web.arn
-#}
diff --git a/variables.tf b/variables.tf
deleted file mode 100644
index c750667..0000000
--- a/variables.tf
+++ /dev/null
@@ -1,4 +0,0 @@
-#variable "instance_type" {
-#  description = "Type of EC2 instance to provision"
-#  default     = "t3.nano"
-#}