一.下载地址

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

二.添加依赖

<!--    后续做持久化用-->
    <dependency>
        <groupId>com.alibaba.csp</groupId>
        <artifactId>sentinel-datasource-nacos</artifactId>
        <version>1.7.2</version>
    </dependency>
<!--sentinel依赖 -->
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        <version>2.2.6.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        <version>2.1.0.RELEASE</version>
    </dependency>

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

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七.流控,降级,熔断

图片太多不展示了.