cfn-cur 0.1.1

A tool to generate CLI Command to continue update rollback of CloudFormation stacks

cfn-cur

A tool to generate AWS CLI command to continue-update-rollback a stack that is stuck in UPDATE_ROLLBACK_FAILED state. The resources to skip are essentially identified using a set of DescribeStackResources, DescribeStacks and DescribeStackEvents API Calls.

Works for stacks with nested stacks. Always pass the root stack ARN and the root stack must be in UPDATE_ROLLBACK_FAILED state. If your root stack is in a different state [ i.e, the nested stack was updated directly ], the stack is ideally in a stuck situation and would need AWS intervention to recover.

Features

• Automatically identifies resources that need to be skipped during continue-update-rollback
• Works with nested stacks
• Generates ready-to-use AWS CLI commands
• Handles complex stack hierarchies

Installation

From PyPI (Recommended)

pip install cfn-cur

From Source

git clone https://github.com/mrlikl/continue-update-rollback.git
cd continue-update-rollback
pip install -e .

Usage

cfn-cur -s <stack-full-arn>

or

cfn-cur --stack_arn <stack-full-arn>

Required Parameters

--stack_arn or -s - The full ARN of the root stack that is stuck in UPDATE_ROLLBACK_FAILED state

How It Works

The tool analyzes the CloudFormation stack events to identify resources that failed during the update process. It then generates an AWS CLI command with the appropriate --resources-to-skip parameter to help you successfully roll back your stack.

Requirements

• Python 3.9 or higher
• AWS credentials configured (via environment variables, AWS profile, or IAM role)
• Boto3