Which solution will meet these requirements in the MOST operationally efficient manner?
Create a new security group that has a different name. Apply identical rules to the new security group. Replace all other security groups that reference the new security group Delete the stack.
Create a CloudFormation change set to delete the security group. Deploy the change set.
Delete the stack again. Specify that the security group be retained.
Perform CloudFormation drift detection. Delete the stack.
Explanations:
This option requires creating a new security group and updating all references to it, which is time-consuming and operationally intensive. It does not directly address the stack deletion issue and can lead to inconsistencies if not all references are updated correctly.
Creating a CloudFormation change set to delete the security group would not solve the problem of the stack being in DELETE_FAILED status due to dependencies. The change set would fail because the security group is still referenced by other resources.
This option allows the engineer to delete the stack while retaining the security group, avoiding disruption to other applications. This is the most operationally efficient solution as it directly addresses the DELETE_FAILED status without the need for additional changes or updates.
Performing CloudFormation drift detection is not relevant to resolving the DELETE_FAILED status. Drift detection only identifies differences between the stack and the deployed resources but does not assist in deleting the stack or handling dependencies.
I value that the answer is:
Delete the stack again. Specify that the security group be retained.