lambda-on-deprecated-runtimes-finder

This repo contains sample code for finding Lambda functions running on deprecated and soon-to-be deprecated managed runtimes and prioritize their upgrades. The code is provided as-is for illustrational purposes only.

Important notes

1. The information about deprecated runtimes can be found in runtimes.js file. It is taken from the official Lambda documentation page. While repo owner makes best effort to keep the deprecated runtimes list in the runtimes.js file up to date, always make sure you compare it to the official Lambda docs.

2. The project uses following data sources to build reports

   • Lambda's ListFunctions API is used to retrieve the full list of functions in the account
   • CloudWatch Logs DescribeLogStreams API is used to retrieve the latest LogStream associated with each Lambda function to check the last activity timestamp and days since.
   • CloudWatch Metrics GetMetricStatistics API is used to retrieve the count of Invocations reported in the last 14 days.

Usage

1. Clone the repo, run npm install
2. Make sure you have AWS CLI installed and configured to use the region/account you want to scan
3. Run the app with npm start or node .. The app will use region/account you have currently configured in the AWS CLI.
4. The reports will be generated under /reports directory

Reports

Reports are generated in the CSV format under /reports directory and include following properties

• NAME
• ARN
• RUNTIME
• IS_DEPRECATED
• IS_SOON_DEPRECATED
• DEPRECATION_DATE
• DAYS_SINCE_DEPRECATION (negative value if deprecation is in future)
• LAST_LOG_EVENT_TIMESTAMP
• DAYS_SINCE_LAST_LOG_EVENT
• INVOKES_IN_LAST_14_DAYS