Day 6 — Containers (ECS / EKS / Fargate)

[PunithVT]

Day 6. Lambda is great until it isn't. Picking up containers so we know when to step up from serverless and how to actually run something.

Topics to cover:

1. ECS vs EKS vs Fargate — when to pick which, and what each one really costs to operate
2. Writing a Dockerfile for a Python service / agent — slim images, multi-stage builds
3. Task definitions, services, and ALB integration on ECS
4. Autoscaling — target tracking vs step scaling, scaling on custom metrics
5. Running agents and MCP servers in containers — long-lived state, websockets, gotchas

Plan: Chandana on ECS/EKS/Fargate decisions and ALB wiring, me on container patterns for agents and MCP servers, both of us shipping a small dockerized service.