Writing an API Gateway in Go (Part 5/5): Reliability - Rate Limiting & Circuit Breakers

Description

Welcome to the finale of the "API Gateway from Scratch in Go" series! In previous videos, we built a fast, load-balanced, and observable gateway. But in the real world, production is chaotic. Users spam APIs, databases lock up, and services crash. If your gateway can't handle this, it becomes the single point of failure. In this final deep dive, we add the Reliability Layer. We are going beyond simple proxying to implement two critical distributed systems patterns from scratch: Distributed Rate Limiting and Circuit Breaking. We won't just import libraries—we will build the algorithms manually to understand the "systems engineering" behind them. MY GITHUB : https://github.com/inodinwetrust10/apiGateway