Technology · Ebook

SlimFaas: Lightweight Functions on Kubernetes

by Shriira Press

SlimFaas is a lightweight Function-as-a-Service platform that takes a deliberately minimal approach: instead of brokers, custom controllers, and special function packaging, it sits in front of the deployments you already run and gives them serverless behaviour through a handful of pod annotations. A function is just an ordinary deployment that SlimFaas can scale to zero, wake on demand, route to, and invoke synchronously or through a durable asynchronous queue. This book works from the problem and philosophy through the HTTP proxy and request flow, the annotations that define functions, the two-phase PromQL-driven scaling engine, async invocation with retries and jobs, the Raft-backed SlimData store and internal workers, and finally how to deploy, observe, and place SlimFaas in the cloud-native landscape.

Contents

1. 1Preface
2. 2Chapter 1 — The Slim Idea
3. 3Chapter 2 — The Proxy and the Request Flow
4. 4Chapter 3 — Functions Are Just Deployments
5. 5Chapter 4 — Scaling Between Zero and Many
6. 6Chapter 5 — Async, Retries, and Jobs
7. 7Chapter 6 — State, SlimData, and Internals
8. 8Chapter 7 — SlimFaas in Practice