Simple Terraform Configuration to create 1 ec2 instance with Name tag

main.tf

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

variable "instance_name" {
    type = "string"
    description = "Name of EC2 Instance"
}

data "aws_ami" "ubuntu" {
  most_recent = true

  filter {
    name   = "name"
    values = ["ubuntu/images/hvm-ssd/ubuntu-trusty-14.04-amd64-server-*"]
  }

  filter {
    name   = "virtualization-type"
    values = ["hvm"]
  }

  owners = ["099720109477"] # Canonical
}

resource "aws_instance" "web" {
  ami           = "${data.aws_ami.ubuntu.id}"
  instance_type = "t2.micro"

  tags {
    Name = "${var.instance_name}"
  }
}