What Is Sentinel?
As distributed systems are becoming increasingly popular, the reliability between services is becoming more important than ever before. Sentinel is a powerful flow control component that takes "flow" as the breakthrough point and covers multiple fields including flow control, concurrency limiting, circuit breaking, and adaptive system protection to guarantee the reliability of microservices.
随着分布式系统的日益普及，服务间的可靠性变得比以往任何时候都重要。Sentinel是一个功能强大的流控制组件，以“流”为突破口，涵盖流量控制、并发限制、电路中断、自适应系统保护等多个领域，保证微服务的可靠性。
传送门：https://github.com/alibaba/Sentinel/wiki
2：下载
传送门：https://github.com/alibaba/Sentinel/releases/
3：启动
java -jar sentinel-dashboard-1.7.0.jar
4:登录 http://localhost:8080/ 默认是8080 和汤姆猫有点冲突，账号密码 sentinel sentinel
5：登录成功后会显示这个页面，服务列表是空的(我这个存在1个是应为，我自己有微服务注册上来了)，cloud具体怎么使用Sentinel请看后续文章。