amazon-web-services - 有没有办法从子网列表中选择在 CloudFormation 中启动 EC2 实例？

Question

我正在尝试创建一个 CF 模板来启动三个不同的环境，但我希望能够选择在哪个子网中启动 EC2 实例，而无需在模板中对特定子网进行硬编码。然而，在下面的示例中，我收到一个错误，指出 SubnetId 必须是字符串。我想不出任何其他方法来实现这一目标。有什么想法吗？

Parameters:
  EnvironmentType:
    Type: String
    Default: Dev  
    AllowedValues:
      - Dev  
      - Test 
      - Production
    Description: Select Environment Type (Dev, Test, Production)
  SubnetIdList:
    Type: String
    AllowedValues: 
      - Public1
      - Public2
      - Private
    Description: Select a subnet
  
    

Mappings:
  InstanceSize:
    Dev:
      "EC2" : "t3.micro"
    Test:
      "EC2" : "t3.small"
    Production:
      "EC2" : "t3.medium"
  Sub:
    Public1:
      "Subnet" : "subnet-05daa558dc3f65529" #public 1
    Public2:
      "Subnet" : "subnet-0f57bb83e0fc545f4" #public 2
    Private:
      "Subnet" : "subnet-0eb76c49954acc803" #Private
    
    
    

Resources:
  EC2:
    Type: AWS::EC2::Instance
    Properties:
      ImageId: ami-0080e4c5bc078760e
      InstanceType: !FindInMap [InstanceSize, !Ref EnvironmentType, EC2]
      KeyName: Ashkelon
      SubnetId: [Sub, !Ref SubnetIdList, Subnet]

Answer 1

我认为您的 Ec2 子网参数定义中缺少 !FindInMap。见下文

Resources:
  EC2:
     Type: AWS::EC2::Instance
     Properties:
     ImageId: ami-0080e4c5bc078760e
     InstanceType: !FindInMap [InstanceSize, !Ref EnvironmentType, EC2]
     KeyName: Ashkelon
     SubnetId: !FindInMap [Sub, !Ref SubnetIdList, Subnet]