How can the team resolve the error in the MOST efficient manner to ensure that all resources are deleted without errors?
Add a DeletionPolicy attribute to the S3 bucket resource, with the value Delete forcing the bucket to be removed when the stack is deleted.
Add a custom resource with an AWS Lambda function with the DependsOn attribute specifying the S3 bucket, and an IAM role. Write the Lambda function to delete all objects from the bucket when RequestType is Delete.
Identify the resource that was not deleted. From the S3 console, empty the S3 bucket and then delete it.
Replace the EC2 and S3 bucket resources with a single AWS OpsWorks Stacks resource. Define a custom recipe for the stack to create and delete the EC2 instance and the S3 bucket.
Explanations:
TheDeletionPolicyattribute with the valueDeleteis used to ensure that resources such as EC2 instances or other AWS resources are deleted when the stack is deleted. However, for an S3 bucket, this alone will not suffice to delete the bucket if it contains objects. S3 buckets must be empty before they can be deleted, so this approach won’t fully resolve the issue.
A custom Lambda function can be used to delete the contents of the S3 bucket before the stack deletion. When the Lambda function is triggered with theRequestTypeset toDelete, it can delete all objects in the bucket, allowing CloudFormation to delete the bucket as part of the stack deletion process. This ensures that the bucket is emptied and deleted.
While manually emptying the S3 bucket and deleting it from the S3 console might resolve the immediate issue, it is not a solution that works automatically during stack deletion. The requirement is to ensure all resources are deleted automatically when the CloudFormation stack is deleted, which this approach does not address.
AWS OpsWorks Stacks is a configuration management service that is not designed to manage CloudFormation stacks. Replacing the EC2 and S3 resources with an OpsWorks stack would not address the issue at hand, which is ensuring the automatic deletion of the S3 bucket. This solution introduces unnecessary complexity and is not a direct way to resolve the problem.
I categorize that the answer is:
Add a custom resource with an AWS Lambda function with the DependsOn attribute specifying the S3 bucket, and an IAM role. Write the Lambda function to delete all objects from the bucket when RequestType is Delete.