adding tests

terraform/main.tf

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+provider "aws" {
+  region = local.region
+}
+
+locals {
+  region = "eu-central-1"
+  name   = "hgn" ###change this to your name
+}
+
+### create a key pair
+module "key_pair" {
+  source = "terraform-aws-modules/key-pair/aws"
+
+  key_name           = "${local.name}-test-key"
+  create_private_key = true
+}
+
+
+### create a vpc
+module "vpc" {
+  source  = "terraform-aws-modules/vpc/aws"
+  version = "5.13.0"
+
+  name = "${local.name}-vpc"
+  cidr = "10.0.0.0/16"
+
+  azs             = ["eu-central-1a", "eu-central-1b", "eu-central-1c"]
+  private_subnets = ["10.0.1.0/24", "10.0.2.0/24", "10.0.3.0/24"]
+  public_subnets  = ["10.0.101.0/24", "10.0.102.0/24", "10.0.103.0/24"]
+
+
+  enable_nat_gateway = true
+  single_nat_gateway = true
+
+  enable_dns_hostnames = true
+  enable_dns_support   = true
+
+  enable_flow_log = true
+
+  tags = {
+    terraform   = "true"
+    environment = "test"
+    creator     = "${local.name}"
+  }
+}
+
+### create a security group
+module "web_server_sg" {
+  source              = "terraform-aws-modules/security-group/aws//modules/http-80"
+  name                = "${local.name}-web-server-sg"
+  description         = "Security group for web server of ${local.name}"
+  vpc_id              = module.vpc.vpc_id
+  ingress_cidr_blocks = ["0.0.0.0/0"]
+  ingress_rules       = ["http-80-tcp", "https-443-tcp", "ssh-tcp"]
+}
+
+
+
+### create an ec2 instance
+module "ec2_instance" {
+  source = "terraform-aws-modules/ec2-instance/aws"
+  name   = "${local.name}-web-server"
+
+  instance_type          = "t2.micro"
+  key_name               = module.key_pair.key_pair_name
+  monitoring             = true
+  vpc_security_group_ids = [module.web_server_sg.security_group_id]
+  subnet_id              = module.vpc.public_subnets[0]
+  user_data              = file("userdata.sh")
+
+  tags = {
+    Terraform   = "true"
+    Environment = "test"
+    creator     = "${local.name}"
+  }
+}

terraform/userdata.sh

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+#!/bin/bash
+
+sudo yum update -y
+sudo yum install -y httpd
+sudo systemctl start httpd
+sudo systemctl enable httpd
+echo "<h1>Hello World</h1> <br> <h2> You successfully deployed your first EC2 instance using Terraform</h2>" | sudo tee /var/www/html/index.html
+sudo systemctl restart httpd