Scenario
- There could be some stacks missed out during teardown process due to some issues and this might leave those stacks orphaned.
- Also when App teams create a new stack without deleting their previous stack, this will leave the previous stack orphaned.
Solution
- List out all the stacks based on the state in the corresponding account using below python script. Filter the suspecting orphaned stacks from the list.
# Function: EvaluateOrphanedStacks # Purpose: List out stacks based on the state and accounts import boto3 import json from datetime import datetime from datetime import date cfn_client=boto3.client('cloudformation') def list_stacks(): paginator = cfn_client.get_paginator('list_stacks') response_iterator = paginator.paginate( StackStatusFilter=[ 'CREATE_IN_PROGRESS', 'CREATE_FAILED', 'CREATE_COMPLETE', 'ROLLBACK_IN_PROGRESS', 'ROLLBACK_FAILED', 'ROLLBACK_COMPLETE', 'DELETE_IN_PROGRESS', 'DELETE_FAILED', 'UPDATE_IN_PROGRESS', 'UPDATE_COMPLETE_CLEANUP_IN_PROGRESS', 'UPDATE_COMPLETE', 'UPDATE_ROLLBACK_IN_PROGRESS', 'UPDATE_ROLLBACK_FAILED', 'UPDATE_ROLLBACK_COMPLETE_CLEANUP_IN_PROGRESS', 'UPDATE_ROLLBACK_COMPLETE', 'REVIEW_IN_PROGRESS', 'IMPORT_IN_PROGRESS', 'IMPORT_COMPLETE', 'IMPORT_ROLLBACK_IN_PROGRESS', 'IMPORT_ROLLBACK_FAILED', 'IMPORT_ROLLBACK_COMPLETE' ] ) for page in response_iterator: for stack in page['StackSummaries']: print(stack['StackName']) if __name__ == '__main__': list_stacks() Note:
Its ALWAYS recommended and good practice to reduce the orphaned stacks and unwanted resources !
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