一.下载地址

**Tags · alibaba/Sentinel (github.com) **

二.添加依赖

    
        com.alibaba.csp
        sentinel-datasource-nacos
        1.7.2
    

    
        com.alibaba.cloud
        spring-cloud-starter-alibaba-sentinel
        2.2.6.RELEASE
    
    
        com.alibaba.cloud
        spring-cloud-starter-alibaba-nacos-discovery
        2.1.0.RELEASE
    

三.配置yml

server:
  port: 8401


spring:
  application:
    name: cloudalibaba-sentinel-service
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848  #配置nacos地址
    sentinel:
      transport:
#        配置sentinel-dashboard地址
        dashboard: localhost:8080
#        默认8719端口,假如端口被占用会自动从8719开始依次+1扫描,直到找到没被占用的端口
        port: 8719
#消费者将要去访问微服务的名称(成功注册进nacos的微服务提供者)

management:
  endpoints:
    web:
      exposure:
        include: '*'

四.启动类

@SpringBootApplication
@EnableDiscoveryClient
public class Mainapp8401 {
    public static void main(String[] args) {
        SpringApplication.run(Mainapp8401.class,args);
    }
}

五.controller

@RestController
public class sentinelController {

    @GetMapping("/testA")
    public String testA(){
        return "testA";
    }

    @GetMapping("/testB")
    public String testB(){
        return "testB";
    }
}

六.访问端口

先访问 localhost:8401/testA

在进入Sentinel界面

七.流控,降级,熔断

图片太多不展示了.