Gateway architecture diagram

This template system depicts the core position, internal modules, and upstream and downstream interactions of an API gateway in a microservice or distributed system architecture. It aims to help architects, development engineers, and operations personnel fully understand the responsibilities and traffic processing logic of the gateway layer. The template adopts a layered or flow-oriented structure, dividing the gateway architecture into three main modules: the client access layer, the gateway core layer, and the backend service layer. The client access layer displays various requests from Web, mobile, and IoT devices; the gateway core layer is subdivided into key functional modules such as routing and forwarding, authentication and authorization, rate limiting and circuit breaking, log monitoring, protocol conversion, and request/response formatting; the backend service layer interfaces with specific business microservices or legacy systems. The template also covers key design elements such as high-availability deployment modes (e.g., clustering, multi-active), configuration center integration (e.g., Nacos, Consul), service discovery mechanisms, and security protection strategies (e.g., SSL/TLS, IP whitelisting). Through a structured architecture diagram framework, it ensures a clear hierarchy, well-defined responsibilities, and traceable data flow in the description of the gateway architecture, providing a visual reference for technology selection, system review, and troubleshooting.