amazon-web-servicesaws-cloudformationserverlessaws-sam

Waiter ChangeSetCreateComplete failed: Waiter encountered a terminal failure state


I am following a CloudFormation tutorial and this is my AWS CloudFormation template:

AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Description: A starter AWS Lambda function.
Resources:
  helloworldpython3:
    Type: 'AWS::Serverless::Function'
    Properties:
      Handler: app.lambda_handler
      Runtime: python3.6
      CodeUri: src/
      Description: A starter AWS Lambda function.
      MemorySize: 128
      Timeout: 3
      Environment:
        Variables:
          TABLE_NAME: !Ref Table
          REGION_NAME: !Ref AWS::Region
      Events:
        HelloWorldSAMAPI:
          Type: Api
          Properties:
            Path: /hello
            Method: GET
      Policies:
        - DynamoDBCrudPolicy:
            TableName: !Ref Table

Table:
  Type: AWS::Serverless::SimpleTable
  Properties:
    PrimaryKey:
      Name: greeting
      Type: String
    ProvisionedThroughput:
      ReadCapacityUnits: 1
      WriteCapacityUnits: 1

I can generate the final template with aws cloudformation package. But when I try to deploy it with sam deploy, I get this output from the shell:

error : Waiting for changeset to be created.. Error: Failed to create changeset for the stack: hello-world-sam, ex: Waiter ChangeSetCreateComplete failed: Waiter encountered a terminal failure state: For expression "Status" we matched expected path: "FAILED" Status: FAILED. Reason: Invalid template property or properties [Table]


Solution

  • Your YAML is not correctly formatted:

    AWSTemplateFormatVersion: "2010-09-09"
    Transform: "AWS::Serverless-2016-10-31"
    Description: A starter AWS Lambda function.
    Resources:
      helloworldpython3:
        Type: "AWS::Serverless::Function"
        Properties:
          Handler: app.lambda_handler
          Runtime: python3.6
          CodeUri: src/
          Description: A starter AWS Lambda function.
          MemorySize: 128
          Timeout: 3
          Environment:
            Variables:
              TABLE_NAME: !Ref Table
              REGION_NAME: !Ref AWS::Region
          Events:
            HelloWorldSAMAPI:
              Type: Api
              Properties:
                Path: /hello
                Method: GET
          Policies:
            - DynamoDBCrudPolicy:
                TableName: !Ref Table
      Table:
        Type: AWS::Serverless::SimpleTable
        Properties:
          PrimaryKey:
            Name: greeting
            Type: String
          ProvisionedThroughput:
            ReadCapacityUnits: 1
            WriteCapacityUnits: 1
    
    

    Table should be under the Resources. Use a linter like cfn-python-lint