Ecs - Tag - IT Guy Journals https://www.itguyjournals.com/tags/ecs/ Ecs - Tag - IT Guy Journals Hugo -- gohugo.ioenluka.krapic@gmail.com (Luka Krapić) luka.krapic@gmail.com (Luka Krapić)Fri, 02 May 2025 20:59:24 +0100 Building a Portable FastAPI Backend for AWS Lambda and ECS Using Terraform https://www.itguyjournals.com/building-fastapi-backend-for-aws-lambda-and-ecs-using-terraform/ Fri, 02 May 2025 20:59:24 +0100 Luka Krapić https://www.itguyjournals.com/building-fastapi-backend-for-aws-lambda-and-ecs-using-terraform/ In the previous post, we explored how to deploy a FastAPI application on AWS Lambda using an ASGI adapter. This is a great option for early-stage projects: it requires zero infrastructure management, supports rapid iteration, and scales automatically.

But as your application matures, Lambda’s trade-offs can become limiting:

  • Cost scaling with consistent traffic
  • Compute/memory coupling and lack of vertical scaling
  • Package size limits and cold starts

That’s why many teams adopt a container-based workflow that can run on both Lambda (via container images) and ECS Fargate. With a little planning, you can build once and deploy to either platform with minimal friction.

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