python - YAML 格式不正确

Question

我正在尝试使用 Lambda 停止我的 RDS 集群，并使用下面所示的 python 代码来定位集群标签，然而，当尝试创建 CloudFormation 堆栈时，AWS 告诉我 YAML 格式不正确。

例如，它表明 Key = 'True' 的格式不正确。如果我删除那段代码，它就会告诉我下一段代码，client = boto3.client('rds') 的格式也不好。

我已将此代码放入在线 python 验证器中，它没有报告任何问题。有人能帮忙吗？谢谢

Tag = 'AutoPower'
Key = 'True'


client = boto3.client('rds')
response = client.describe_db_cluster()

for resp in response['DBCluster']:
        db_cluster_arn = resp['DBClusterArn']

response = client.list_tags_for_resource(ResourceName=db_cluster_arn)
for tags in response['TagList']:
                if tags['Key'] == str(Key) and tags['Value'] == str(Tag):
                    status = resp['DBClusterStatus']
                    ClusterID = resp['DBClusterIdentifier']
                    print(InstanceID)

                if status == 'available':
                    print("shutting down %s " % ClusterID)
                client.stop_db_cluster(DBClusterIdentifier=ClusterID)

                # print ("Do something with it : %s" % db_instance_arn)
                elif status == 'stopped':
                    print("starting up %s " % ClusterID)
                client.start_db_cluster(DBClusterIdentifier=ClusterID)
                else:
                    print("The database is " + status + " status!")

Answer 1

您很可能会因 CloudFormation YAML 和内联函数代码之间的缩进问题而遇到问题。以下是 CloudFormation YAML 的示例，它将使用内联代码来创建函数:

Resources:
  YourFunction:
    Type: AWS::Lambda::Function
    Properties:
      Code:
        ZipFile: |
          Tag = 'AutoPower'
          Key = 'True'

          client = boto3.client('rds')
          response = client.describe_db_cluster()

          for resp in response['DBCluster']:
              db_cluster_arn = resp['DBClusterArn']

          response = client.list_tags_for_resource(ResourceName=db_cluster_arn)
          for tags in response['TagList']:
              if tags['Key'] == str(Key) and tags['Value'] == str(Tag):
                  status = resp['DBClusterStatus']
                  ClusterID = resp['DBClusterIdentifier']
                  print(InstanceID)
    
              if status == 'available':
                  print("shutting down %s " % ClusterID)
              client.stop_db_cluster(DBClusterIdentifier=ClusterID)
    
              # print ("Do something with it : %s" % db_instance_arn)
              elif status == 'stopped':
                  print("starting up %s " % ClusterID)
              client.start_db_cluster(DBClusterIdentifier=ClusterID)
              else:
                  print("The database is " + status + " status!")

      Handler: index.lambda_handler
      Role: !Sub "arn:aws:iam::${AWS::AccountId}:role/YourRoleNameHere"
      Runtime: python3.9
      Description: This is an example of a function in CloudFormation
      FunctionName: Your_Function_Name
      MemorySize: 128
      Timeout: 180