Hello,

I open a pull request awslabs/aws-cloudformation-templates/pull/273 because I though that was the "official" repository for Macro Example. However I stumbled upon this repository.

Could you advise as to which repository should be used in order to get a new Cloudformation Macro example included?

Thanks a lot

The Count macro is setup with python3.6 which is deprecated and it fails to deploy to AWS. Would be great if this macro can be updated with a newer supported version of python 3.9.

$cfn-lint template.yaml 
E2531 Deprecated runtime (python3.6) specified. Updating disabled since 2022-08-17. Please consider updating to python3.9
template.yaml:14:3

Is it possible to create a resource schema for boto3 macro so that it can be validated correctly by cfn-lint?

The S3Objects macro fails to deploy files to a bucket that has ACLs disabled.

steps to repro:

1. Create a bucket
2. Disable ACLs on the bucket by setting it to BucketOwnerEnforced.
3. Use the S3Objects macro to put a file into the bucket.

NewObject:
  Type: AWS::S3::Object
  Properties:
    Target:
      Bucket: !Ref TargetBucket
      Key: README.md
    Body: |
      # My text file

4. Get the following error on deployment..

[ERROR] ClientError: An error occurred (AccessControlListNotSupported) when calling the
PutObject operation: The bucket does not allow ACLs
Traceback (most recent call last):
  File "/var/task/resource.py", line 72, in handler
    s3_client.put_object(**target)
  File "/var/runtime/botocore/client.py", line 391, in _api_call
    return self._make_api_call(operation_name, kwargs)
  File "/var/runtime/botocore/client.py", line 719, in _make_api_call
    raise error_class(parsed_response, operation_name)
[ERROR] ClientError: An error occurred (AccessControlListNotSupported) when calling the
PutObject operation: The bucket does not allow ACLs Traceback (most recent call last):
File "/var/task/resource.py", line 72, in handler     s3_client.put_object(**target)   
File "/var/runtime/botocore/client.py", line 391, in _api_call     return self._make_api_call(operation_name, kwargs)   
File "/var/runtime/botocore/client.py", line 719, in _make_api_call     raise error_class(parsed_response, operation_name)

Hi , I am wondering how can i get the resource output which created by count macro . For example i need to get the ec2 instance ip which is refered by macro

There are several issues to get here.

• The S3Objects macro does not contain a copy of deploy.sh. I copied it from the Count macro, which deployed the functions and the macro resource.
• the file macro-template has to be renamed to template.yaml for deploy.sh to execute.
• the resource function needs to be python3.6 not 2.7

Running this template

---
AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31

Resources:
  ResourceFunction:
    Type: AWS::Serverless::Function
    Properties:
      Runtime: python3.6
      CodeUri: lambda
      Handler: resource.handler
      Policies: AmazonS3FullAccess

  MacroFunction:
    Type: AWS::Serverless::Function
    Properties:
      Runtime: python3.6
      CodeUri: lambda
      Handler: macro.handler
      Policies: AmazonS3FullAccess
      Environment:
        Variables:
          LAMBDA_ARN: !GetAtt ResourceFunction.Arn

  Macro:
    Type: AWS::CloudFormation::Macro
    Properties:
      Name: S3Objects
      FunctionName: !GetAtt MacroFunction.Arn

results in the error
aws cloudformation create-stack --stack-name bucket
-objects --template-body file://s3bucketa.yaml --capabilities CAPABILITY_AUTO_EXPAND
An error occurred (ValidationError) when calling the CreateStack operation: Template f
ormat error: Unrecognized resource types: [AWS::S3::Object]

I have made the changes in my cloned repo, but I haven't figured that unrecognized resource type yet. If I can figure it out, I will contribute the changes back. Would appreciate any assistance.

Hi Team,
We are trying to parameterize the Count value(eg. 2, 3 or any value) by passing the parameter from JSON file to the Cloud formation template. But we are getting error as "Received malformed response from transform". Could you please help us to fix this? if it is possible to parameterize the Count Macro, please share the the steps needs to carried out to fix this issue.

Issue Description:

If the template contains !Join or a plain list like "files:" property as mentioned below, Explode Transform fails with the error "Transform 1234567890::Explode failed without an error message".

Metadata:

    AWS::CloudFormation::Init:
      config:
        files:
          c:\cfn\cfn-hup.conf:
            content: !Join ['', [
              '[main]
              ',
              stack=, !Ref 'AWS::StackName', '
              ',
              region=, !Ref 'AWS::Region', '
              '
            ]]
          c:\cfn\hooks.d\cfn-auto-reloader.conf:
            content: !Join ['', [
              '[cfn-auto-reloader-hook]
              ',
              'triggers=post.update
              ',
              'path=Resources.LaunchConfiguration1.Metadata.AWS::CloudFormation::Init
              ',
              'action=cfn-init.exe -v -s ', !Ref 'AWS::StackId', ' -r LaunchConfiguration1',' --region ', !Ref 'AWS::Region', '
              '
            ]]
        services:
          windows:
            cfn-hup:
              enabled: 'true'
              ensureRunning: 'true'
              files:
                - c:\cfn\cfn-hup.conf
                - c:\etc\cfn\hooks.d\cfn-auto-reloader.conf

While debugging the issue, I found that this is because when walk_resource function get executed for the above properties, resource.items() here throws below error.

for key, value in resource.items():
AttributeError: 'str' object has no attribute 'items'

Reproduction Steps:

• Deploy the Explode macro using the stesp mentioned here
• Create a new CloudFormation stack using the template in Explode_Repro.zip
• Stack creation will fail with the above error "Transform 1234567890::Explode failed without an error message"

If there is % anywhere in CloudFormation template, it gives below error.

Received malformed response from transform 12345XXXXX::Count

For example:

  DiskSpaceAlarm:
    Type: AWS::CloudWatch::Alarm
    Count: !Ref Instancescount
    Properties:
      AlarmDescription: Over 95 of volume space is in use
      AlarmActions:
      - !Ref SNSTopicEc2
      MetricName: "% Free Space"

There should be either some 'delimiter' or lambda should consider only specific (e.g. %d) as a placeholder not all %.

The Count macro is setup with python3.6 which is deprecated and it fails to deploy to AWS. Would be great if this macro can be updated with a newer supported version of python 3.9.

$cfn-lint template.yaml 
E2531 Deprecated runtime (python3.6) specified. Updating disabled since 2022-08-17. Please consider updating to python3.9
template.yaml:14:3

I am creating multiple ec2 instances using Count macro. Macro code does not account Outputs section when I try to obtain physical ids of launched EC2 Instances.

There is a bug in the String macro Lambda function when using StripFrom Right.

In this code block

              elif operation == "MaxLength":
                      length = int(event["params"]["Length"])
                      if len(input) <= length:
                          response["fragment"] = input
                      elif "StripFrom" in event["params"]:
                          if event["params"]["StripFrom"] == "Left":
                              response["fragment"] = input[len(input)-length:]
                          elif event["params"]["StripFrom"] != "Right":
                              response["status"] = "failure"
                      else:
                          response["fragment"] = input[:length]

the else is never executed when StripFrom is present to return the result. The transform lambda successfully executes, but since there is no response['fragment'] is the return to CloudFormation, a template processing error results.

If the code is changed to

                elif operation == "MaxLength":
                      length = int(event["params"]["Length"])
                      if len(input) <= length:
                          response["fragment"] = input
                      elif "StripFrom" in event["params"]:
                          if event["params"]["StripFrom"] == "Left":
                              response["fragment"] = input[len(input)-length:]
                          elif event["params"]["StripFrom"] != "Right":
                              response["status"] = "failure"
                         else:
                              response["fragment"] = input[:length]

the the macros return correctly when using StripFrom Right and the response['fragment'] is in the return back to CloudFormation.

I've cloned the repo and followed the the steps on README (aka I created an s3 bucket then ran the deploy.sh script.
However I have the following error on the deploy step:

Received malformed response from transform AWS::Serverless-2016-10-31

Am I missing something?

The boto3 macro is setup with python2.7 which is EOL and not even supported by SAM any longer which means it will fail to deploy to AWS. Would be great if this macro can be updated with a newer supported version of python.

AWS CloudFormation Linter................................................Failed

- hook id: cfn-python-lint

- exit code: 2

E2531 Deprecated runtime (python2.7) specified. Updating disabled since 2021-09-30. Please consider updating to python3.8

template.yaml:5:3