Alibaba Sentinel

Alibaba Sentinel is a powerful open source flow control component enabling reliability, resilience, and monitoring for microservices. Originally developed by Alibaba and used in production at Alibaba for over 10 years, Sentinel provides flow control, traffic shaping, concurrency limiting, circuit breaking, and system adaptive overload protection. The project is written primarily in Java with a Go implementation (sentinel-golang) also available. Sentinel integrates with major frameworks including Spring Cloud, Dubbo, gRPC, Apache RocketMQ, and Servlet. It provides a real-time monitoring dashboard for visualizing metrics and configuring rules dynamically. The project is hosted on GitHub under the Alibaba organization and is widely adopted in cloud-native microservice architectures.