main.tf

terraform {
  required_version = ">= 0.12.0"
}

provider "aws" {
  region = "us-west-2"
}

variable "vpc_name" {
  description = "name of the VPC"
  default = "tf-0.12-fce-example"
}

resource "aws_vpc" "my_vpc" {
  cidr_block = "172.16.0.0/16"
  tags = {
    Name = var.vpc_name
  }
}

resource "aws_subnet" "my_subnet" {
  vpc_id = aws_vpc.my_vpc.id
  cidr_block = "172.16.10.0/24"
  availability_zone = "us-west-2a"
  tags = {
    Name = "tf-0.12-fce-example"
  }
}

resource "aws_network_interface" "foo" {
  subnet_id = aws_subnet.my_subnet.id
  private_ips = ["172.16.10.100"]
  tags = {
    Name = "tf-0.12-fce-primary_network_interface"
  }
}

resource "aws_instance" "foo" {
  ami = "ami-22b9a343" # us-west-2
  instance_type = "t2.micro"

  tags = {
    Name = "tf-0.12-fce-ec2-instance"
  }

  network_interface {
    network_interface_id = aws_network_interface.foo.id
    device_index = 0
  }
}

output "private_dns" {
  value = aws_instance.foo.private_dns
}