CloudFormation에서 조건문에 CommaDelimitedList형 변수를 사용할 때(yaml)

날과 씨

실패 예

Parameters:
  ENV:
    Type: String
    AllowedValues:
      - dev
      - stg
      - prd
  EC2SGIDDev:
    Type: CommaDelimitedList
    Default: sg-hoge, sg-fuga
  EC2SGIDStg:
    Type: CommaDelimitedList
    Default: sg-foo, sg-bar
  EC2SGIDPrd:
    Type: CommaDelimitedList
    Default: sg-piyo, sg-baz
Resources:
	HogeLaunchTemplate:
	    Type: AWS::EC2::LaunchTemplate
	    Properties:
	      LaunchTemplateData:
		# 省略
		# この書き方だとエラーになる
		SecurityGroupIds: !If [IsDev, !Ref EC2SGIDDev, !If IsStg, !Ref EC2SGIDStg, !Ref EC2SGIDPrd]

결실

전제 조건

컨텐트

AWSTemplateFormatVersion: '2010-09-09'
Description: hoge
Parameters:
  ENV:
    Type: String
    AllowedValues:
      - dev
      - stg
      - prd
  EC2SGIDDev:
    Type: CommaDelimitedList
    Default: sg-hoge, sg-fuga
  EC2SGIDStg:
    Type: CommaDelimitedList
    Default: sg-foo, sg-bar
  EC2SGIDPrd:
    Type: CommaDelimitedList
    Default: sg-piyo, sg-baz
Conditions:
  IsDev: !Equals [!Ref ENV, dev]
  IsStg: !Equals [!Ref ENV, stg]
  IsPrd: !Equals [!Ref ENV, prd]
Resources:
	HogeLaunchTemplate:
	    Type: AWS::EC2::LaunchTemplate
	    Properties:
	      LaunchTemplateData:
		# 省略
		# 入れ子で構文エラーを回避
		SecurityGroupIds: !If [IsDev, !Ref EC2SGIDDev, !If [IsStg, !Ref EC2SGIDStg, !Ref EC2SGIDPrd]]