Terraform practice - simple application

Author: Iliyan Vutoff

terraform/main.tf

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+data "aws_ami" "aws_ami" {
+  owners      = ["amazon", "self"]
+  most_recent = true
+
+  filter {
+    name   = "name"
+    values = ["amzn-ami-hvm-*-x86_64-gp2"]
+  }
+}
+
+module "webserver" {
+  source = "./modules/web"
+
+  instance_type = var.instance_type
+  ami_id        = data.aws_ami.aws_ami.id
+}
+
+output "public_ip" {
+  value = module.webserver.public_ip
+}

terraform/modules/web/README.md

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+<!-- BEGIN_TF_DOCS -->
+## Requirements
+
+| Name | Version |
+|------|---------|
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | 1.6.6 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | 5.31.0 |
+
+## Providers
+
+| Name | Version |
+|------|---------|
+| <a name="provider_aws"></a> [aws](#provider\_aws) | 5.31.0 |
+
+## Modules
+
+No modules.
+
+## Resources
+
+| Name | Type |
+|------|------|
+| [aws_instance.amzn](https://registry.terraform.io/providers/hashicorp/aws/5.31.0/docs/resources/instance) | resource |
+| [aws_security_group.allow_ssh](https://registry.terraform.io/providers/hashicorp/aws/5.31.0/docs/resources/security_group) | resource |
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|------|---------|:--------:|
+| <a name="input_ami_id"></a> [ami\_id](#input\_ami\_id) | AMI ID | `string` | n/a | yes |
+| <a name="input_instance_type"></a> [instance\_type](#input\_instance\_type) | Instance Type | `string` | n/a | yes |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| <a name="output_public_ip"></a> [public\_ip](#output\_public\_ip) | Public IP of the EC2 instance |
+<!-- END_TF_DOCS -->

terraform/modules/web/main.tf

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+resource "aws_instance" "amzn" {
+  ami             = var.ami_id
+  instance_type   = var.instance_type
+  security_groups = [aws_security_group.allow_ssh.name]
+}
+
+resource "aws_security_group" "allow_ssh" {
+  name        = "allow_ssh"
+  description = "Allow SSH inbound traffic"
+
+  ingress {
+    description = "SSH from VPC"
+    from_port   = 22
+    to_port     = 22
+    protocol    = "tcp"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+
+  egress {
+    description = "Allow all outbound traffic"
+    from_port   = 0
+    to_port     = 0
+    protocol    = "-1"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+}

terraform/modules/web/outputs.tf

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+output "public_ip" {
+  value       = aws_instance.amzn.public_ip
+  description = "Public IP of the EC2 instance"
+}

terraform/modules/web/variables.tf

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+variable "instance_type" {
+  type        = string
+  description = "Instance Type"
+}
+
+variable "ami_id" {
+  type        = string
+  description = "AMI ID"
+}

terraform/modules/web/versions.tf

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+terraform {
+  required_version = "1.6.6"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "5.31.0"
+    }
+  }
+}

terraform/variables.tf

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+variable "aws_region" {
+  type    = string
+  default = "eu-west-1"
+}
+
+variable "instance_type" {
+  type    = string
+  default = "t3.micro"
+}

terraform/vars/prod.tfvars

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+aws_region    = "us-east-1"
+instance_type = "m5.large"

terraform/vars/staging.tfvars

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+aws_region = "eu-west-1"
+instance_type = "t3.micro"

terraform/versions.tf

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+terraform {
+  required_version = "1.6.6"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 5.0"
+    }
+  }
+}
+
+provider "aws" {
+  region = var.aws_region
+}