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--- terraform:modules2 [10/02/2025 15:31] – removed andrew
+++ terraform:modules2 [10/02/2025 15:32] (current) – created andrew
@@ Line 1: / Line 1: @@
+====== Terraform Modules ======
+===== Structure =====
+<code>
+tree
+.
++--- input.tf
++--- main.tf
++--- modules
+|   +--- dynamo_module
+|   |   +--- main.tf
+|   |   +--- outputs.tf
+|   |   +--- README.md
+|   |   +--- variables.tf
+|   +--- parameter_module
+|   |   +--- main.tf
+|   |   +--- outputs.tf
+|   |   +--- variables.tf
++--- outputs.tf
++--- README
++--- setup.tf
+</code>
+===== Root module =====
+setup.tf
+<code hcl>
+# Export key and secret credentials first.
+# run as -> $ terraform apply
+terraform {
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "3.74.1"
+    }
+  }
+  backend "s3" {
+    region         = "eu-west-2"
+    bucket         = "terraform-statefiles"
+    key            = "tsg/plan-apply.tfstate"
+    dynamodb_table = "tsg-plan-apply-lockfiles"
+  }
+}
+</code>
+main.tf
+<code hcl>
+provider "aws" {
+  region = "eu-west-X"
+  default_tags {
+    tags =  {
+      name = "ModuleTest"
+    }
+  }
+}
+module "dynamo" {
+  source  = "./modules/dynamo_module"
+  table_name = "Test_table2"
+  #email_address = "user@company.com"
+}
+module "parameters" {
+  source = "./modules/parameter_module"
+  parameter_key = "test_key"
+  parameter_value = "Silly_Parameter"
+}
+</code>
+<code hcl>
+output "environment" {
+  value = "prod"
+}
+output "table_arn" {
+  value = module.dynamo.arn
+}
+output "Parameter_arn" {
+  value = module.parameters.parameter_arn
+}
+output "parameter_value" {
+  value = module.parameters.parameter_value
+  sensitive = true
+}
+</code>
+===== Modules -> dynamo_module =====
+main.tf
+<code hcl>
+resource "aws_dynamodb_table" "dynamo_table" {
+  name         = var.table_name
+  billing_mode = "PAY_PER_REQUEST"
+  hash_key     = "UserID"
+  attribute {
+    name = "UserID"
+    type = "S"
+  }
+  tags = {
+    "BuiltBy" = "Terraform"
+    "email" = var.email_address
+  }
+}
+</code>
+outputs.tf
+<code>
+# Output variable definitions
+output "arn" {
+  description = "ARN of the VPC"
+  value       =aws_dynamodb_table.dynamo_table.arn
+}
+</code>
+variables.tf
+<code hcl>
+# Input variable definitions
+variable "table_name" {
+  description = "Name of the table."
+  type        = string
+}
+variable "email_address" {
+  description = "Owner's email"
+  default = "myemail@company.com"
+  type        = string
+}
+</code>
+===== Modules -> parameter_module =====
+main.tf
+<code hcl>
+resource "aws_ssm_parameter" "nonsense_parameter" {
+  name  = var.parameter_key
+  type  = "String"
+  value = var.parameter_value
+}
+</code>
+outputs.tf
+<code hcl>
+# Output variable definitions
+output "parameter_value" {
+  description = "Value of Parameter"
+  value       = aws_ssm_parameter.nonsense_parameter.value
+}
+output "parameter_arn" {
+  description = "ARN of parameter"
+  value = aws_ssm_parameter.nonsense_parameter.arn
+}
+</code>
+variables.tf
+<code hcl>
+# Input variable definitions
+variable "email_address" {
+  description = "Owner's email"
+  default     = "myparameteremail@company.com"
+  type        = string
+}
+variable "parameter_key" {
+  description = "Key name"
+  type        = string
+}
+variable "parameter_value" {
+  description = "value"
+  type        = string
+}
+</code>