A production environment with slightly different settings is created.

code/terraform/04-terraform-modules/module-example/prod/data-stores/mysql/main.tf

@@ -0,0 +1,26 @@
+provider "aws" {
+  region  = "us-east-2"
+  version = "~> 2.62"
+}
+
+terraform {
+  backend "s3" {
+    bucket         = "terraform-book-state"
+    key            = "module-example/prod/data-stores/mysql/terraform.tfstate"
+    region         = "us-east-2"
+    dynamodb_table = "terraform-book-locks"
+    encrypt        = true
+  }
+}
+
+resource "aws_db_instance" "example" {
+  identifier_prefix   = "terraform-up-and-running"
+  engine              = "mysql"
+  allocated_storage   = 10
+  instance_class      = "db.t2.micro"
+  skip_final_snapshot = true
+
+  name     = var.db_name
+  username = "admin"
+  password = var.db_password
+}

code/terraform/04-terraform-modules/module-example/prod/data-stores/mysql/outputs.tf

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+output "address" {
+  value = aws_db_instance.example.address
+  description = "Connect to the database at this endpoint"
+}
+
+output "port" {
+  value = aws_db_instance.example.port
+  description = "The port the database ist listening on"
+}

code/terraform/04-terraform-modules/module-example/prod/data-stores/mysql/variables.tf

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+variable "db_password" {
+  description = "The master password for the database"
+  type        = string
+}
+
+variable "db_name" {
+  description = "The database name"
+  type = string
+  default = "example_database_prod"
+}

code/terraform/04-terraform-modules/module-example/prod/services/webserver-cluster/main.tf

@@ -0,0 +1,17 @@
+provider "aws" {
+  region  = "us-east-2"
+  version = "~> 2.62"
+}
+
+module "webserver_cluster" {
+  source = "../../../modules/services/webserver-cluster"
+
+  cluster_name = "webservers-prod"
+  db_remote_state_bucket = "terraform-book-state"
+  db_remote_state_key = "module-example/prod/data-stores/mysql/terraform.tfstate"
+  db_remote_state_region = "us-east-2"
+
+  instance_type = "t2.small"
+  min_size = 2
+  max_size = 10
+}

code/terraform/04-terraform-modules/module-example/prod/services/webserver-cluster/outputs.tf

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+output "alb_dns_name" {
+  value = module.webserver_cluster.alb_dns_name
+  description = "The domain name of the load balancer"
+}

code/terraform/04-terraform-modules/module-example/prod/services/webserver-cluster/variables.tf

@@ -0,0 +1,23 @@
+variable "cluster_name" {
+  description = "The name to use to namespace all the resources in the cluster"
+  type        = string
+  default     = "webservers-prod"
+}
+
+variable "db_remote_state_bucket" {
+  description = "The name of the S3 bucket used for the database's remote state storage"
+  type        = string
+  default     = "terraform-book-state"
+}
+
+variable "db_remote_state_key" {
+  description = "The name of the key in the S3 bucket used for the database's remote state storage"
+  type        = string
+  default     = "module-example/prod/data-stores/mysql/terraform.tfstate"
+}
+
+variable "db_remote_state_region" {
+  description = "The region the remote state lives in"
+  type        = string
+  default     = "us-east-2"
+}