Fusing and degrading Sentinel

Recently, more attention has been paid to current limiting , At present, cognition is divided into two parts ： Gateway current limiting 、 Middleware current limiting .
Personally feel Sentinel It's the future trend , Because of simple configuration , There are also visual pages , Ha ha ha .

1. Common fuse components

1.1 Hystrix

Hystrix By Netflflix An open source delay and fault tolerance Library , Used to isolate access to remote systems 、 Services or third-party libraries , Prevent cascading failures , So as to improve the availability and fault tolerance of the system .

1.2 Resilience4J

Resilicence4J A very lightweight 、 Simple , And the documentation is very clear 、 Rich fuse tools , This is also Hystrix Officially recommended alternatives . More Than This ,Resilicence4j Restore health support Spring Boot 1.x/2.x, And monitoring also supports and prometheus And other mainstream products .

1.3 Sentinel

Sentinel Alibaba is an open source circuit breaker implementation , Alibaba itself has been adopted on a large scale , Very stable .

2. be the speaker Sentinel

flow control 、 Fusing the drop 、 System load protection . Undertook alijin 10 Double 11 in , Highly available , It has complete real-time monitoring and extensive ecological . Microservice Integration Sentinel It's simple , Just add Sentinel You can rely on .
Sentinel In two parts ：

2.1 Core library （Java client ）

Don't rely on any framework / library , Can run on all Java Runtime environment , At the same time Dubbo /Spring Cloud And other frameworks also have better support .

2.2 Console （Dashboard）

be based on Spring Boot Development , It can run directly after packing , No additional Tomcat Etc. Application containers .

2.3 rely on

<dependency>
	<groupId>com.alibaba.cloud</groupId>
	<artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>