Terraform 주요 구성 요소

provider "aws" {
  region = "ap-northeast-2"
  access_key = var.aws_access_key
  secret_key = var.aws_secret_key
}

resource "aws_instance" "my_instance" {
  ami           = "ami-0c55b159cbfafe1f0"
  instance_type = "t2.micro"
  tags = {
    Name = "TerraformInstance"
  }
}

data "aws_ami" "latest_amazon_linux" {
  most_recent = true
  owners      = ["amazon"]

  filter {
    name   = "name"
    values = ["amzn2-ami-hvm-*-x86_64-gp2"]
  }
}

resource "aws_instance" "example" {
  ami           = data.aws_ami.latest_amazon_linux.id
  instance_type = "t2.micro"
}

variable "instance_type" {
  description = "EC2 타입"
  default     = "t2.micro"
}

instance_type = "t3.micro"

output "instance_ip" {
  value = aws_instance.example.public_ip
}

locals {
  name_prefix = "dev-"
}

resource "aws_s3_bucket" "example" {
  bucket = "${local.name_prefix}s3-bucket"
}

resource "aws_instance" "example" {
  ...

  provisioner "remote-exec" {
    inline = [
      "sudo apt update",
      "sudo apt install -y nginx"
    ]
  }

  connection {
    type     = "ssh"
    user     = "ubuntu"
    private_key = file("~/.ssh/id_rsa")
    host     = self.public_ip
  }
}

variable "tags" {
  default = {
    "Name"      = "example"
    "Environment" = "dev"
  }
}

resource "aws_instance" "example" {
  ...

  dynamic "tags" {
    for_each = var.tags
    content {
      key   = tags.key
      value = tags.value
    }
  }
}