amazon-web-services - Cloudformation 转换无效的 Yaml/JSON

Question

我有如下 2 个模板。我想问的是如何在Transform中使用Sub等变量？

当我添加 UserData 时，出现以下错误。这是关于 Sub 的。如何根据变换来改变它？

转换 AWS::Include 失败:指定的 S3 对象的内容应该是有效的 Yaml/JSON。用户请求回滚。

ma​​in.yaml

Parameters:
  VpcId:
    Type: 'AWS::EC2::VPC::Id'
  Subnets:
    Type: 'List<AWS::EC2::Subnet::Id>'
  InstanceType:
    Type: String
    Default: c5.large
    AllowedValues:
      - c5.large
      - c5.xlarge
Resources: 
 Instance:
    Fn::Transform:
      Name: AWS::Include
      Parameters:
        Location:
          Fn::Sub: s3://test-bucket/instance.yaml

instance.yaml

Type: 'AWS::EC2::Instance'
Properties:
  KeyName: test
  ImageId: ami-0015a39e4b7c0966f
  InstanceType:
    Ref: InstanceType
  SubnetId:
    Fn::Select: [ 0, Ref: Subnets ] 
  SecurityGroupIds: 
    - Fn::GetAtt: [ Sec, GroupId ]
  UserData:
    Fn::Base64:
      !Sub |
        #!/bin/bash -xe
        yum update -y aws-cfn-bootstrap
        /opt/aws/bin/cfn-init -v --stack ${AWS::StackName} --resource LaunchConfig --configsets wordpress_install --region ${AWS::Region}
        /opt/aws/bin/cfn-signal -e $? --stack ${AWS::StackName} --resource WebServerGroup --region ${AWS::Region}

Answer 1

您不能使用!Sub。它应该是 Fn::Sub::

Type: 'AWS::EC2::Instance'
Properties:
  KeyName: test
  ImageId: ami-0015a39e4b7c0966f
  InstanceType:
    Ref: InstanceType
  SubnetId:
    Fn::Select: [ 0, Ref: Subnets ] 
  SecurityGroupIds: 
    - Fn::GetAtt: [ Sec, GroupId ]
  UserData:
    Fn::Base64:
      Fn::Sub: |
        #!/bin/bash -xe
        yum update -y aws-cfn-bootstrap
        /opt/aws/bin/cfn-init -v --stack ${AWS::StackName} --resource LaunchConfig --configsets wordpress_install --region ${AWS::Region}
        /opt/aws/bin/cfn-signal -e $? --stack ${AWS::StackName} --resource WebServerGroup --region ${AWS::Region}

此限制已涵盖 in the documentation :

We don't currently support using shorthand notations for YAMLsnippets.