Terraform Registry

기본 문법

<aside> <img src="/icons/compose_gray.svg" alt="/icons/compose_gray.svg" width="40px" /> 기본 문법

variable "example" {
	default = "hello"
}

resource "aws_instance" "example" {
	instance_type = "t2.micro"
	ami           = "ami-abc123"
}

• 확장자 : .tf
• 값 참조 방식
  • resource : <resource type>.<name>
  • data : data.<data type>.<name>
  • input : var.<name>
  • local : local.<name>
  • child module output : module.<module name>.<output>
  • workspace : terraform.workspace
  • filesystem : path.module, path.root, path.cwd

<aside> 📚 arguments(=attribute)

• 식별자(argument name) = 값(argument value)

  image_id = "abc123"
  

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<aside> <img src="/icons/archive_gray.svg" alt="/icons/archive_gray.svg" width="40px" /> blocks

• 컨텐츠의 묶음

  resource "aws_instance" "example" {
  	ami = "abc123"
  
  	network_interface {
  		# ...
  	}
  }
  

<aside> <img src="/icons/rename_gray.svg" alt="/icons/rename_gray.svg" width="40px" /> 최상위 Block type

• resource, input, output, data, module

  <block type> "<block label>" "<block label>" {
  	<argument name> = "<argument value>"
  
  	<nested block type> {
  
  	}
  }
  

  <block type> "<block label>" "<block label>" {
  	# Block body
  	<identifier> = <expression> # Argument
  }
  

  <aside> <img src="/icons/brain_gray.svg" alt="/icons/brain_gray.svg" width="40px" /> Resource

  ---

  • 가상의 네트워크나 인스턴스같은 객체를 표현

  • resource type은 provider에 따라 다름

    

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  <aside> <img src="/icons/chart_gray.svg" alt="/icons/chart_gray.svg" width="40px" /> Data

  ---

  • terraform 외부에서 정의된 정보 (기본 ami id, iam policy id 등등)

  data "aws_ami" "example" {
  	most_recent = true
  
  	owners = ["self"]
  	tags = {
  		Name   = "app-server"
  		Tested = "true"
  	}
  }
  

  </aside>

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JSON 문법

<aside> <img src="/icons/compose_gray.svg" alt="/icons/compose_gray.svg" width="40px" /> JSON 문법

{
	"variable": {
		"example": {
			"default": "hello"
		}
	}
}

{
	"resource": {
		"aws_instance": {
			"example": {
				"instance_type": "t2.micro",
				"ami": "ami-abc123"
			}
		}
	}
}

• 확장자 : .tf.json </aside>