@aws-cdk/cx-api

Cloud executable protocol

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Cloud Executable API

cdk-constructs: Stable

This module is part of the AWS Cloud Development Kit project.

V2 Feature Flags

  • @aws-cdk/aws-s3:createDefaultLoggingPolicy

Enable this feature flag to create an S3 bucket policy by default in cases where an AWS service would automatically create the Policy if one does not exist.
For example, in order to send VPC flow logs to an S3 bucket, there is a specific Bucket Policy that needs to be attached to the bucket. If you create the bucket without a policy and then add the bucket as the flow log destination, the service will automatically create the bucket policy with the necessary permissions. If you were to then try and add your own bucket policy CloudFormation will throw and error indicating that a bucket policy already exists.
In cases where we know what the required policy is we can go ahead and create the policy so we can remain in control of it.
https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/AWS-logs-and-resource-policy.html#AWS-logs-infrastructure-S3
cdk.json
{
  "context": {
    "@aws-cdk/aws-s3:createDefaultLoggingPolicy": true
  }
}

  • @aws-cdk/aws-sns-subscriptions:restrictSqsDescryption

Enable this feature flag to restrict the decryption of a SQS queue, which is subscribed to a SNS topic, to only the topic which it is subscribed to and not the whole SNS service of an account.
Previously the decryption was only restricted to the SNS service principal. To make the SQS subscription more secure, it is a good practice to restrict the decryption further and only allow the connected SNS topic to decryption the subscribed queue.
cdk.json
{
  "context": {
    "@aws-cdk/aws-sns-subscriptions:restrictSqsDescryption": true
  }
}