API Gateway & Reverse Proxy (Nginx + Spring Cloud Gateway) · Lesson

Defining Routes & Predicates

Learn to define dynamic routes using predicates (e.g., Path, Host, Method) to direct requests to specific services.

Routing with API Gateways

Welcome! In a microservices architecture, clients don't talk directly to every service. Instead, they interact with an API Gateway.

This gateway acts as a single entry point, directing incoming requests to the correct backend service. This process is called routing.

In Spring Cloud Gateway, predicates are key to routing. Think of them as 'conditions' or 'rules'.

A predicate evaluates to true or false.
If a predicate (or set of predicates) for a route evaluates to true, the gateway forwards the request using that route.
If false, the gateway tries the next route.