Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 498 discussion

A is right By creating a Lambda function that deletes objects from the S3 bucket, you can ensure that the old CloudFormation stack is deleted even if the deletion process fails. Attaching this Lambda function as a custom resource in the CloudFormation stack allows CloudFormation to wait for the delete operation to complete before proceeding with the deletion of the old stack. The DependsOn attribute ensures that the Lambda function runs after the S3 bucket has been deleted, preventing any potential issues with deleting objects that may not be removed yet. Attaching this custom resource solves the issue without requiring major architecture changes.

By using a Lambda function as a custom resource, you can ensure that the Lambda function deletes the objects in the S3 bucket before CloudFormation attempts to delete the bucket itself. Adding the DependsOn attribute ensures that the S3 bucket resource will not be deleted until the Lambda function has completed its task of clearing out all objects from the bucket, thus avoiding any errors caused by attempting to delete a non-empty S3 bucket. Options B and C: These options will not work because the DeletionPolicy attribute does NOT trigger the deletion of the OBJECTS INSIDE THE BUCKET. It ONLY determines what happens to the BUCKET RESOURCE ITSELF, not its contents. The stack deletion will still fail if objects remain in the bucket. Option D introduces significant architectural changes, which are unnecessary for solving the stack deletion issue.

A, for sure. DeletionPolicy: Delete: The DeletionPolicy attribute in CloudFormation is used to specify what should happen to a resource when the stack is deleted. The value Delete indicates that CloudFormation should delete the resource (in this case, the S3 bucket) when the stack is deleted. Non-Empty Buckets: The problem with this approach is that CloudFormation cannot delete an S3 bucket if it contains any objects. The DeletionPolicy: Delete does not change this behavior; it only specifies that the bucket should be deleted, which will still fail if the bucket is not empty.

A, for sure. DeletionPolicy: Delete: The DeletionPolicy attribute in CloudFormation is used to specify what should happen to a resource when the stack is deleted. The value Delete indicates that CloudFormation should delete the resource (in this case, the S3 bucket) when the stack is deleted. Non-Empty Buckets: The problem with this approach is that CloudFormation cannot delete an S3 bucket if it contains any objects. The DeletionPolicy: Delete does not change this behavior; it only specifies that the bucket should be deleted, which will still fail if the bucket is not empty.

you can´t delete a S3 bucket with objects in it. So A is correct

By setting the Deletion Policy attribute to Delete in the stack, you ensure that the S3 bucket and its contents are deleted when the CloudFormation stack is deleted. This best option for the scenario and and aligns with the desired behavior of removing old resources when the stack is deleted.

IT SHOULD BE A

I will go for A. Using Lambda function as a custom resource ensures that the S3 bucket is emptied before the stack is deleted. DependsOn Attribute ensures the Lambda function runs and completes before attempting to delete the S3 bucket, thus preventing deletion failure.

When you specify a DeletionPolicy attribute with a value of Delete for an S3 bucket in a CloudFormation template, CloudFormation will delete the bucket and all its contents during stack deletion. This approach addresses the issue of the stack deletion failing due to the bucket not being empty.

Votes C. After s3 snapshot, cloud formation will proceed s3 bucket deletion. A is right but compare to c it doesn't match the requirement in the question. "resolve this issue without major architecture changes." Also the data become useless only after 24 hours. A delete everything regardless. C is better.

it should be A

"DependsOn" attribute ensures that the Lambda function will always be invoked before the S3 bucket is deleted in a CloudFormation. Answer A.