_main.tf

provider "aws" {
  region  = "${var.aws-region}"
  profile = "${var.aws-profile}"
}

resource "aws_instance" "instance" {
  ami                         = "${var.instance-ami}"
  instance_type               = "${var.instance-type}"
 
  iam_instance_profile        = "${var.iam-role-name != "" ? var.iam-role-name : ""}"
  key_name                    = "${var.instance-key-name != "" ? var.instance-key-name : ""}"
  associate_public_ip_address = "${var.instance-associate-public-ip}"
  # user_data                   = "${file("${var.user-data-script}")}"
  user_data                   = "${var.user-data-script != "" ? file("${var.user-data-script}") : ""}"
  vpc_security_group_ids      = ["${aws_security_group.sg.id}"]
  subnet_id                   = "${aws_subnet.subnet.id}"

  tags = {
    Name = "${var.instance-tag-name}"
  }
}

resource "aws_vpc" "vpc" {
  cidr_block           = "${var.vpc-cidr-block}"
  enable_dns_hostnames = true

  tags = {
    Name = "${var.vpc-tag-name}"
  }
}

resource "aws_internet_gateway" "ig" {
  vpc_id = "${aws_vpc.vpc.id}"

  tags = {
    Name = "${var.ig-tag-name}"
  }
}

resource "aws_subnet" "subnet" {
  vpc_id     = "${aws_vpc.vpc.id}"
  cidr_block = "${var.subnet-cidr-block}"

  tags = {
    Name = "${var.subnet-tag-name}"
  }
}

resource "aws_route_table" "rt" {
  vpc_id = "${aws_vpc.vpc.id}"

  route {
    cidr_block = "0.0.0.0/0"
    gateway_id = "${aws_internet_gateway.ig.id}"
  }
}

resource "aws_route_table_association" "rta" {
  subnet_id      = "${aws_subnet.subnet.id}"
  route_table_id = "${aws_route_table.rt.id}"
}

resource "aws_security_group" "sg" {
  name   = "${var.sg-tag-name}"
  vpc_id = "${aws_vpc.vpc.id}"

  ingress {
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
    from_port   = "22"
    to_port     = "22"
  }

  ingress {
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
    from_port   = "80"
    to_port     = "80"
  }

  ingress {
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
    from_port   = "443"
    to_port     = "443"
  }

  ingress {
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
    from_port   = "8080"
    to_port     = "8080"
  }

  egress {
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
    from_port   = "0"
    to_port     = "0"
  }

  tags = {
    Name = "${var.sg-tag-name}"
  }
}