Observability Best Practices when running FastAPI in a Lambda

• aws-recipes

  3 3 5.6 Python

The required files to follow along in this example are available on GitHub, or here on my blog.

• starlette

  55 9,638 9.0 Python

  The little ASGI framework that shines. 🌟

  

Further information on FastAPI GitHub Issue and Starlette GitHub Issue:

• Scout Monitoring

  www.scoutapm.com featured

  Free Django app performance insights with Scout Monitoring. Get Scout setup in minutes, and let us sweat the small stuff. A couple lines in settings.py is all you need to start monitoring your apps. Sign up for our free tier today.

  

• mangum

  17 1,624 2.5 Python

  AWS Lambda support for ASGI applications

But we do not have a handler function, do we? We have a Mangum object wrapping the FastAPI application. Luckily, the Mangum object acts as a handler function, so we can just add the following in example/src/app/__init__.py:

• aws-embedded-metrics-node

  7 245 5.0 TypeScript

  Amazon CloudWatch Embedded Metric Format Client Library

  

Let's explore the next core utility in Lambda Powertools, the Metrics utility. This utility lets you easily push metrics to CloudWatch by taking care of all the necessary boilerplate. It works asynchronously by using Amazon CloudWatch Embedded Metrics Format, by logging the metrics to stdout. It also aggregates all metrics from each invocation to save on the number of calls to CloudWatch.

Suggest a related project