main.tf

# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# DEPLOY A SINGLE EC2 INSTANCE
# This template runs a simple "Hello, World" web server on a single EC2 Instance
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# ----------------------------------------------------------------------------------------------------------------------
# REQUIRE A SPECIFIC TERRAFORM VERSION OR HIGHER
# This module has been updated with 0.12 syntax, which means it is no longer compatible with any versions below 0.12.
# ----------------------------------------------------------------------------------------------------------------------

terraform {
  required_version = ">= 0.12"
}

# ------------------------------------------------------------------------------
# CONFIGURE OUR AWS CONNECTION
# ------------------------------------------------------------------------------

provider "aws" {
  region = var.region
}

# ---------------------------------------------------------------------------------------------------------------------
# DEPLOY A SINGLE EC2 INSTANCE
# ---------------------------------------------------------------------------------------------------------------------

resource "aws_default_vpc" "default" {
  tags = {
    Name        = "Default VPC"
    Environment = var.environment
    Project     = "testing"
  }
}

resource "aws_instance" "testing_instance" {
  ami                    = var.ami_id
  instance_type          = var.instance_size
  vpc_security_group_ids = [aws_security_group.security_group.id]

  tags = {
    Name        = join("-", [var.environment, "testing", var.instance_name])
    Environment = var.environment
    Project     = "testing"
  }
}

# ---------------------------------------------------------------------------------------------------------------------
# CREATE THE SECURITY GROUP THAT'S APPLIED TO THE EC2 INSTANCE
# ---------------------------------------------------------------------------------------------------------------------

resource "aws_security_group" "security_group" {
  name        = join("-", [var.environment, "testing", "security-group"])
  description = "A Security Group for my testing instance"

  # Inbound HTTP
  ingress {
    from_port   = var.port
    to_port     = var.port
    protocol    = "tcp"
    cidr_blocks = var.cidr_blocks
  }

  tags = {
    Name        = join("-", [var.environment, "testing", "security-group"])
    Environment = var.environment
    Project     = "testing"
  }
}