Sentinel實(shí)現(xiàn)熔斷與限流

1.sentinel官網(wǎng)

1.2官網(wǎng)

https://github.com/alibaba/Sentinel
https://github.com/alibaba/Sentinel/wiki/%E4%BB%8B%E7%BB%8D
下載源碼地址

1.2主要特性

1.3使用場(chǎng)景

https://spring-cloud-alibaba-group.github.io/github-pages/greenwich/spring-cloud-alibaba.html#_spring_cloud_alibaba_sentinel
服務(wù)使用中的各種問(wèn)題
服務(wù)雪崩赔癌；服務(wù)降級(jí)；服務(wù)熔斷；服務(wù)限流

2.安裝Sentinel控制臺(tái)

2.1sentinel組件由2部分組成

2.2運(yùn)行環(huán)境

下載https://github.com/alibaba/Sentinel/releases （1.8v）
sentinel-dashboard-1.8.0.jar
java8環(huán)境块饺；
8080端口不能被占用(linux下開啟防火墻端口)
命令：java -jar sentinel-dashboard-1.8.0.jar

2.3訪問(wèn)sentinel管理界面：

http://localhost:8080（登錄賬號(hào)密碼均為sentinel）

3.初始化演示工程

啟動(dòng)Nacos8848成功

3.1創(chuàng)建module

cloudalibaba-sentinel-service8401

3.2POM依賴

        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>

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

        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>

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

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
      
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>4.6.3</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

3.3YML配置

server:
  port: 8401

spring:
  application:
    name: cloudalibaba-sentinel-service
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.1.111:1111
    sentinel:
      transport:
        dashboard: 192.168.1.111:8080
        port: 8719  #默認(rèn)8719，假如被占用了會(huì)自動(dòng)從8719開始依次+1掃描芯杀。直至找到未被占用的端口

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

3.4啟動(dòng)類

@EnableDiscoveryClient  //nacos
@SpringBootApplication
public class MainApp8401
{
    public static void main(String[] args) {
        SpringApplication.run(MainApp8401.class, args);
    }
}

3.5業(yè)務(wù)類FlowLimitController

@RestController
public class FlowLimitController
{
    @GetMapping("/testA")
    public String testA() {
        return "------testA";
    }
    @GetMapping("/testB")
    public String testB() {

        return "------testB";
    }
}

啟動(dòng)Sentinel8080：java -jar sentinel-dashboard-1.8.0
啟動(dòng)微服務(wù)8401
啟動(dòng)8401微服務(wù)后查看sentienl控制臺(tái)
Sentinel采用的懶加載說(shuō)明:需要執(zhí)行一次調(diào)用http://localhost:8401/testA
sentinel8080正在監(jiān)控微服務(wù)8401

4.流控規(guī)則

4.1新增

4.2流控模式

4.2.1系統(tǒng)默認(rèn)

4.2.2測(cè)試
快速點(diǎn)擊訪問(wèn)http://localhost:8401/testA

4.3關(guān)聯(lián)

當(dāng)關(guān)聯(lián)的資源達(dá)到閾值時(shí)资铡，就限流自己
當(dāng)與A關(guān)聯(lián)的資源B達(dá)到閾值后，就限流自己
B惹事扣甲，A掛了

4.3.1配置

4.3.2測(cè)試
postman模擬并發(fā)密集訪問(wèn)testB
大批量線程高并發(fā)訪問(wèn)B，導(dǎo)致A失效了

4.4鏈路

多個(gè)請(qǐng)求調(diào)用了同一個(gè)微服務(wù)

4.4.1流控效果
默認(rèn)直接失敗齿椅，拋出異常（Blocked by Sentinel (flow limiting)）
com.alibaba.csp.sentinel.slots.block.flow.controller.DefaultController
預(yù)熱
公式：閾值除以coldFactor（默認(rèn)值為3）琉挖，經(jīng)過(guò)預(yù)熱時(shí)長(zhǎng)后才會(huì)達(dá)到閾值

https://github.com/alibaba/Sentinel/wiki/%E9%99%90%E6%B5%81---%E5%86%B7%E5%90%AF%E5%8A%A8

4.4.2源碼
com.alibaba.csp.sentinel.slots.block.flow.controller.WarmUpController

4.4.3Warmup配置

多次點(diǎn)擊http://localhost:8401/testB，剛開始不行涣脚，后續(xù)慢慢OK

4.4.4排隊(duì)等待

勻速排隊(duì)示辈，閾值必須設(shè)置為QPS

com.alibaba.csp.sentinel.slots.block.flow.controller.RateLimiterController

5.降級(jí)規(guī)則

Sentinel的斷路器是沒(méi)有半開狀態(tài)的
半開的狀態(tài)系統(tǒng)自動(dòng)去檢測(cè)是否請(qǐng)求有異常，沒(méi)有異常就關(guān)閉斷路器恢復(fù)使用遣蚀，有異常則繼續(xù)打開斷路器不可用矾麻。具體可以參考Hystrix

5.1降級(jí)策略實(shí)戰(zhàn)RT

5.1.1測(cè)試

    @GetMapping("/testD")
    public String testD()
    {
        try { TimeUnit.SECONDS.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); }
        log.info("testD 測(cè)試RT");
        return "------testD";
    }

5.1.2配置

5.2異常比例

5.2.1測(cè)試代碼

@GetMapping("/testD")
    public String testD()
    {
        log.info("testD 測(cè)試RT");
        int age = 10/0;
        return "------testD";
    }

5.2.2配置

5.2.3結(jié)果

5.3異常數(shù)

5.3.1測(cè)試

@GetMapping("/testE")
public String testE()
{
    log.info("testE 測(cè)試異常數(shù)");
    int age = 10/0;
    return "------testE 測(cè)試異常數(shù)";
}

5.4熱點(diǎn)key限流

官網(wǎng)：https://github.com/alibaba/Sentinel/wiki/熱點(diǎn)參數(shù)限流
@SentinelResource
com.alibaba.csp.sentinel.slots.block.BlockException
5.4.1代碼

@GetMapping("/testHotKey")
@SentinelResource(value = "testHotKey",blockHandler = "deal_testHotKey")
public String testHotKey(@RequestParam(value = "p1",required = false) String p1,
                         @RequestParam(value = "p2",required = false) String p2) {
    //int age = 10/0;
    return "------testHotKey";
}
 
//兜底方法
public String deal_testHotKey (String p1, String p2, BlockException exception){
    return "------deal_testHotKey,o(╥﹏╥)o";  
}

5.4.2配置

1.@SentinelResource(value = "testHotKey")
異常打到了前臺(tái)用戶界面看不到，不友好

2.@SentinelResource(value = "testHotKey",blockHandler = "deal_testHotKey")
方法testHostKey里面第一個(gè)參數(shù)只要QPS超過(guò)每秒1次芭梯，馬上降級(jí)處理次乓，用了我們自己定義的

error
http://localhost:8401/testHotKey?p1=abc
http://localhost:8401/testHotKey?p1=abc&p2=33
right
http://localhost:8401/testHotKey?p2=abc

5.5參數(shù)例外項(xiàng)

上述案例演示了第一個(gè)參數(shù)p1,當(dāng)QPS超過(guò)1秒1次點(diǎn)擊后馬上被限流
特殊情況
我們期望p1參數(shù)當(dāng)它是某個(gè)特殊值時(shí)皆辽，它的限流值和平時(shí)不一樣
假如當(dāng)p1的值等于5時(shí)，它的閾值可以達(dá)到200

5.5.1配置

5.5.2測(cè)試
http://localhost:8401/testHotKey?p1=5當(dāng)p1等于5的時(shí)候，閾值變?yōu)?00
http://localhost:8401/testHotKey?p1=3當(dāng)p1不等于5的時(shí)候轰胁，閾值就是平常的1

6系統(tǒng)規(guī)則

https://github.com/alibaba/Sentinel/wiki/%E7%B3%BB%E7%BB%9F%E8%87%AA%E9%80%82%E5%BA%94%E9%99%90%E6%B5%81

6.1配置全局QPS

@SentinelResource
按資源名稱限流+后續(xù)處理
啟動(dòng)Nacos成功,啟動(dòng)Sentinel成功
Module:cloudalibaba-sentinel-service8401

6.1.1POM

<dependency>
    <groupId>com.atguigu.springcloud</groupId>
    <artifactId>cloud-api-commons</artifactId>
    <version>${project.version}</version>
</dependency>

6.1.2YML

server:
  port: 8401

spring:
  application:
    name: cloudalibaba-sentinel-service
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
    sentinel:
      transport:
        dashboard: localhost:8080
        port: 8719  #默認(rèn)8719手蝎，假如被占用了會(huì)自動(dòng)從8719開始依次+1掃描局蚀。直至找到未被占用的端口

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

6.1.3業(yè)務(wù)類RateLimitController

@RestController
public class RateLimitController
{
    @GetMapping("/byResource")
    @SentinelResource(value = "byResource",blockHandler = "handleException")
    public CommonResult byResource()
    {
        return new CommonResult(200,"按資源名稱限流測(cè)試OK",new Payment(2020L,"serial001"));
    }
    public CommonResult handleException(BlockException exception)
    {
        return new CommonResult(444,exception.getClass().getCanonicalName()+"\t 服務(wù)不可用");
    }

主啟動(dòng)后

@EnableDiscoveryClient
@SpringBootApplication
public class MainApp8401
{
    public static void main(String[] args) {
        SpringApplication.run(MainApp8401.class, args);
    }

}

6.2配置流控規(guī)則

6.2.1配置步驟

圖形配置和代碼關(guān)系
表示1秒鐘內(nèi)查詢次數(shù)大于1彻桃，就跑到我們自定義的處流，限流

6.2.2測(cè)試
1秒鐘點(diǎn)擊1下澎媒，OK
超過(guò)上述問(wèn)題搞乏，瘋狂點(diǎn)擊，返回了自己定義的限流處理信息戒努，限流發(fā)送

按照Url地址限流+后續(xù)處理
通過(guò)訪問(wèn)的URL來(lái)限流查描，會(huì)返回Sentinel自帶默認(rèn)的限流處理信息

@GetMapping("/rateLimit/byUrl")
@SentinelResource(value = "byUrl")
public CommonResult byUrl()
{
    return new CommonResult(200,"按url限流測(cè)試OK",new Payment(2020L,"serial002"));
}

瘋狂點(diǎn)擊http://localhost:8401/rateLimit/byUrl
會(huì)返回sentinel自帶的限流處理結(jié)果

image.png

上面兜底方法面臨的問(wèn)題

6.3客戶自定義限流處理邏輯

6.3.1創(chuàng)建customerBlockHandler類用于自定義限流處理邏輯

public class CustomerBlockHandler {
    public static CommonResult handleException(BlockException exception) {
        return new CommonResult(2020, "自定義限流處理信息....CustomerBlockHandler");
    }
}

6.3.2RateLimitController

@GetMapping("/rateLimit/customerBlockHandler")
@SentinelResource(value = "customerBlockHandler",
        blockHandlerClass = CustomerBlockHandler.class,
        blockHandler = "handlerException2")
public CommonResult customerBlockHandler()
{
    return new CommonResult(200,"按客戶自定義",new Payment(2020L,"serial003"));
}

6.3.3啟動(dòng)微服務(wù)后先調(diào)用一次
http://localhost:8401/rateLimit/customerBlockHandler
6.3.4配置

7.服務(wù)熔斷功能

7.1概述

sentinel整合ribbon+openFeign+fallback

7.2Ribbon系列

新建消費(fèi)者cloudalibaba-provider-payment9003/9004

7.2.1POM

<dependencies>
    <!--SpringCloud ailibaba nacos -->
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    </dependency>
    <dependency><!-- 引入自己定義的api通用包，可以使用Payment支付Entity -->
        <groupId>com.atguigu.springcloud</groupId>
        <artifactId>cloud-api-commons</artifactId>
        <version>${project.version}</version>
    </dependency>
    <!-- SpringBoot整合Web組件 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <!--日常通用jar包配置-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

7.2.2YML

server:
  port: 9003

spring:
  application:
    name: nacos-payment-provider
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848 #配置Nacos地址

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

7.2.3啟動(dòng)類

@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain9003
{
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain9003.class, args);
    }
}

7.2.4業(yè)務(wù)類

@RestController
public class PaymentController
{
    @Value("${server.port}")
    private String serverPort;

    public static HashMap<Long, Payment> hashMap = new HashMap<>();
    static{
        hashMap.put(1L,new Payment(1L,"28a8c1e3bc2742d8848569891fb42181"));
        hashMap.put(2L,new Payment(2L,"bba8c1e3bc2742d8848569891ac32182"));
        hashMap.put(3L,new Payment(3L,"6ua8c1e3bc2742d8848569891xt92183"));
    }

    @GetMapping(value = "/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id){
        Payment payment = hashMap.get(id);
        CommonResult<Payment> result = new CommonResult(200,"from mysql,serverPort:  "+serverPort,payment);
        return result;
    }
}

7.2.5新建消費(fèi)者84
cloudalibaba-consumer-nacos-order84
7.2.6POM

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud2020</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloudalibaba-consumer-nacos-order84</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>
        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

7.2.6YML

server:
  port: 84

spring:
  application:
    name: nacos-order-consumer
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
    sentinel:
      transport:
        dashboard: localhost:8080
        port: 8719

service-url:
  nacos-user-service: http://nacos-payment-provider

7.2.7主啟動(dòng)類

@EnableDiscoveryClient
@SpringBootApplication
@EnableFeignClients
public class OrderNacosMain84
{
    public static void main(String[] args) {
        SpringApplication.run(OrderNacosMain84.class, args);
    }
}

7.2.8業(yè)務(wù)類
ApplicationContextConfig


@Configuration
public class ApplicationContextConfig
{
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate()
    {
        return new RestTemplate();
    }
}

CircleBreakerController的全部源碼


@RestController
@Slf4j
public class CircleBreakerController {
    public static final String SERVICE_URL = "http://nacos-payment-provider";
    @Resource
    private RestTemplate restTemplate;
    @RequestMapping("/consumer/fallback/{id}")
    //@SentinelResource(value = "fallback") //沒(méi)有配置
    //@SentinelResource(value = "fallback",fallback = "handlerFallback") //fallback只負(fù)責(zé)業(yè)務(wù)異常
    //@SentinelResource(value = "fallback",blockHandler = "blockHandler") //blockHandler只負(fù)責(zé)sentinel控制臺(tái)配置違規(guī)
    @SentinelResource(value = "fallback",fallback = "handlerFallback",blockHandler = "blockHandler",
            exceptionsToIgnore = {IllegalArgumentException.class})
    public CommonResult<Payment> fallback(@PathVariable Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/"+id, CommonResult.class,id);

        if (id == 4) {
            throw new IllegalArgumentException ("IllegalArgumentException,非法參數(shù)異常....");
        }else if (result.getData() == null) {
            throw new NullPointerException ("NullPointerException,該ID沒(méi)有對(duì)應(yīng)記錄,空指針異常");
        }

        return result;
    }
  
    //fallback
    public CommonResult handlerFallback(@PathVariable  Long id,Throwable e) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(444,"兜底異常handlerFallback,exception內(nèi)容  "+e.getMessage(),payment);
    }
  
    //blockHandler
    public CommonResult blockHandler(@PathVariable  Long id,BlockException blockException) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(445,"blockHandler-sentinel限流,無(wú)此流水: blockException  "+blockException.getMessage(),payment);
    }
}

fallback管運(yùn)行異常
blockHandler管配置違規(guī)

7.2.8測(cè)試地址
http://localhost:84/consumer/fallback/1給客戶error頁(yè)面，不友好

fallback和blockHandler都配置

7.3Feign系列

7.3.1POM

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>

7.3.2YML

server:
  port: 84

spring:
  application:
    name: nacos-order-consumer
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
    sentinel:
      transport:
        dashboard: localhost:8080
        port: 8719

service-url:
  nacos-user-service: http://nacos-payment-provider

#對(duì)Feign的支持
feign:
  sentinel:
    enabled: true

7.3.3業(yè)務(wù)類
帶@FeignClient注解的業(yè)務(wù)接口

@FeignClient(value = "nacos-payment-provider",fallback = PaymentFallbackService.class)
public interface PaymentService
{
    @GetMapping(value = "/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id);
}

fallback = PaymentFallbackService.class
PaymentFallbackService實(shí)現(xiàn)類

@Component
public class PaymentFallbackService implements PaymentService
{
    @Override
    public CommonResult<Payment> paymentSQL(Long id)
    {
        return new CommonResult<>(44444,"服務(wù)降級(jí)返回,---PaymentFallbackService",new Payment(id,"errorSerial"));
    }
}

controller

// OpenFeign
@Resource
private PaymentService paymentService;

@GetMapping(value = "/consumer/paymentSQL/{id}")
public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
    return paymentService.paymentSQL(id);
}

添加@EnableFeignClients啟動(dòng)Feign的功能

@EnableDiscoveryClient
@SpringBootApplication
@EnableFeignClients
public class OrderNacosMain84
{
    public static void main(String[] args) {
        SpringApplication.run(OrderNacosMain84.class, args);
    }
}

http://lcoalhost:84/consumer/paymentSQL/1
測(cè)試84調(diào)用9003冬三，此時(shí)故意關(guān)閉9003微服務(wù)提供者匀油，看84消費(fèi)側(cè)自動(dòng)降級(jí)，不會(huì)被耗死

7.4規(guī)則持久化

一旦我們重啟應(yīng)用勾笆，Sentinel規(guī)則將消失敌蚜，生產(chǎn)環(huán)境需要將配置規(guī)則進(jìn)行持久化
將限流配置規(guī)則持久化進(jìn)Nacos保存，只要刷新8401某個(gè)rest地址窝爪，sentinel控制臺(tái)的流控規(guī)則就能看到弛车，只要Nacos里面的配置不刪除，針對(duì)8401上Sentinel上的流控規(guī)則持續(xù)有效

7.4.1步驟
修改cloudalibaba-sentinel-service8401
POM

<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-datasource-nacos</artifactId>
</dependency>

YML

server:
  port: 8401

spring:
  application:
    name: cloudalibaba-sentinel-service
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848 #Nacos服務(wù)注冊(cè)中心地址
    sentinel:
      transport:
        dashboard: localhost:8080 #配置Sentinel dashboard地址
        port: 8719
      datasource:  #添加Nacos數(shù)據(jù)源配置
        ds1:
          nacos:
            server-addr: localhost:8848
            dataId: cloudalibaba-sentinel-service
            groupId: DEFAULT_GROUP
            data-type: json
            rule-type: flow

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

feign:
  sentinel:
    enabled: true # 激活Sentinel對(duì)Feign的支持

7.4.2添加Nacos業(yè)務(wù)規(guī)則配置

7.4.3啟動(dòng)8401后刷新sentinel發(fā)現(xiàn)業(yè)務(wù)規(guī)則有了

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