CloudFormation 使用 FindInMap 连接字符串列表

Question

在从地图中获取字符串列表后，我遇到了 Cloudformation 加入字符串列表的问题。

导致的错误是安全组需要一个字符串列表。

"123456":
    us-east-1:
      #VPC1
      VpcId: vpc-xxxx
      VpcCidr: 10.78.160.0/20
      SecurityGroups: sg-123
      AvailabilityZones: us-east-1a,us-east-1b,us-east-1c
"123457":
    us-east-1:
      #VPC
      VpcId: vpc-xxxx
      VpcCidr: 10.78.160.0/20
      SecurityGroups: sg-123,sg-124
      AvailabilityZones: us-east-1a,us-east-1b,us-east-1c

LaunchConfig:
    Type: AWS::AutoScaling::LaunchConfiguration
    Metadata:
      AWS::CloudFormation::Init:
        config:
    Properties:
      InstanceType:
        Ref: InstanceType
      SecurityGroups: !Join [ ",", [!FindInMap [!Ref "AWS::AccountId", !Ref "AWS::Region", SecurityGroups], !Ref EC2SG ]]
      IamInstanceProfile:

请告诉我如何获取安全组列表并将其添加到另一个资源

用这个问题解决了

How do I use nested lists or append to a list in Cloudformation?

Answer 1

让我们进行映射：

Mappings:
  "111222333444":
    us-east-1:
      SecurityGroups:
        - sg-abc
        - sg-xyz
    us-west-2:
      SecurityGroups:
        - sg-1234
        - sg-3456

安全组可以称为

SecurityGroupIds:
  "Fn::FindInMap":
    [!Ref AWS::AccountId, !Ref AWS::Region, SecurityGroups]

在映射中定义为数组并传递完整的数组，这样我们就可以避免拆分和连接。

完整模板，在 Lambda 上测试

AWSTemplateFormatVersion: "2010-09-09"
Description: "Test"
Mappings:
  "111222333444":
    us-east-1:
      SecurityGroups:
        - sg-abc
        - sg-xyz
    us-west-2:
      SecurityGroups:
        - sg-1234
        - sg-3456
Resources:
  TestLambda:
    Type: "AWS::Lambda::Function"
    Properties:
      Handler: com.test.MainClass::handleRequest
      Runtime: java8
      FunctionName: "Test-Lambda"
      Code:
        S3Bucket: code-bucket
        S3Key: !Sub "artifacts/test.jar"
      Description: "Test Lambda"
      MemorySize: 512
      Timeout: 60
      Role: !Ref my-role-arn
      VpcConfig:
        SecurityGroupIds:
          "Fn::FindInMap":
            [!Ref AWS::AccountId, !Ref AWS::Region, SecurityGroups]
        SubnetIds:
          - subnet-1
          - subnet-2