Add support for AWS::CloudFormation::Init

TypeScript CDK 0.9.2

How to write AWS::CloudFormation::Init metadata with AWS Construct Library for cfn-init ? I want to add AWS::CloudFormation::Init metadata to AutoScalingGroup.

[eladb]

Still relevant

[0xdevalias]

Any updates/likely merge time on https://github.com/awslabs/aws-cdk/pull/792 , or at least a worked example of how to add AWS::CloudFormation::Init to an autoscaling.AutoScalingGroup?

• https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-init.html
• https://awslabs.github.io/aws-cdk/refs/_aws-cdk_aws-autoscaling.html#auto-scaling-group

The following template shows that it should be added to the AWS::AutoScaling::LaunchConfiguration in the CloudFormation:

• https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/example-templates-autoscaling.html

I see that https://github.com/awslabs/aws-cdk/issues/606 makes reference to being able to find/modify children since 0.10.0. Following the syntax there… it looks like the following should work for us…:

// Ref: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-init.html
// Ref: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/example-templates-autoscaling.html
const asgLaunchConfig = asg.findChild('LaunchConfig') as autoscaling.cloudformation.LaunchConfigurationResource;
asgLaunchConfig.addOverride("Metadata", {
    "AWS::CloudFormation::Init": {
        "FOO": "BAR",
    }
});

Running cdk synth, I get the following, which implies it is working as expected:

AutoScalingGroupLaunchConfigDEEB160C:
  Type: 'AWS::AutoScaling::LaunchConfiguration'
  ..snip..
  Metadata:
      'AWS::CloudFormation::Init':
          FOO: BAR