第四篇 SpringCloud Alibaba Sentinel实现熔断与限流(下篇)

古城微笑少年丶 2022-12-03 02:00 189阅读 0赞

官网地址：

[https://github.com/alibaba/Sentinel/wiki/%E6%B3%A8%E8%A7%A3%E6%94%AF%E6%8C%81][https_github.com_alibaba_Sentinel_wiki_E6_B3_A8_E8_A7_A3_E6_94_AF_E6_8C_81]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center]

### 1.1按资源名称限流+后续处理 ###

#### 1.1.1业务代码 ####

准备

import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
    
    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class CommonResult<T>
    { 
        private Integer code;
        private String  message;
        private T       data;
    
        public CommonResult(Integer code,String message)
        { 
            this(code,message,null);
        }
    }

import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
    import java.io.Serializable;
    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class Payment implements Serializable
    { 
        private Long id;
        private String serial;
    }

真正业务代码

import com.alibaba.csp.sentinel.annotation.SentinelResource;
    import com.alibaba.csp.sentinel.slots.block.BlockException;
    import com.niugang.entities.CommonResult;
    import com.niugang.entities.Payment;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /** * create date 2020-08-31 15:33 by niugang */
    @RestController
    public class RateLimitController { 
        @GetMapping("/byResource")
        @SentinelResource(value = "byResource", blockHandler = "handleException")
        public CommonResult byResource() { 
            return new CommonResult(200, "按资源名称限流测试OK", new Payment(2020L, "serial001"));
        }
    
        public CommonResult handleException(BlockException exception) { 
            return new CommonResult(444, exception.getClass().getCanonicalName() + "\t 服务不可用");
        }
    }

#### 1.1.2配置 ####

配置步骤  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 1]表示1秒钟内查询次数大于1，就跑到我们自定义的处流，限流

#### 1.1.3测试 ####

1秒钟点击1下，OK  
![在这里插入图片描述][20200901144738992.png_pic_center]  
超过上述问题，疯狂点击，返回了自己定义的限流处理信息，限流发送  
![在这里插入图片描述][2020090114475489.png_pic_center]

#### 1.1.4额外问题 ####

此时关闭微服务8401看看

Sentinel控制台，流控规则消失了？？？？？ 临时/持久？

### 1.2按照Url地址限流+后续处理 ###

通过访问的URL来限流，会返回Sentinel自带默认的限流处理信息

#### 1.2.1业务代码 ####

@GetMapping("/rateLimit/byUrl")
    @SentinelResource(value = "byUrl")
    public CommonResult byUrl()
    { 
        return new CommonResult(200,"urlOK",new Payment(2020L,"serial002"));
    }

#### 1.2.2配置 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 2]\#\#\#\# 1.2.3测试

点击一次  
![在这里插入图片描述][20200901144837790.png_pic_center]  
疯狂点击[http://localhost:8401/rateLimit/byUrl][http_localhost_8401_rateLimit_byUrl]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 3]\#\#\# 1.3上面兜底方法面临的问题

*  系统默认的，没有体现我们自己的业务
 *  依照现有条件，我们自定义的处理方法和业务代码耦合在一块，不直观
 *  每个业务方法都添加一个兜底的，那代码膨胀加剧。
 *  全局同意的处理方法没有体现出来

### 1.4客户自定义限流处理逻辑 ###

**第一步：**

创建customerBlockHandler类用于自定义限流处理逻辑

**第二步：**

自定义限流处理类

import com.alibaba.csp.sentinel.slots.block.BlockException;
    import com.niugang.entities.CommonResult;
    
    /** * create date 2020-08-31 16:09 by niugang */
    public class CustomerBlockHandler { 
       /** * 方法必须是静态的 public方法 * @param exception * @return */
        public static CommonResult handleException(BlockException exception) { 
            return new CommonResult(2020, "自定义限流处理信息....CustomerBlockHandler");
        }
    
        public static CommonResult handleException2(BlockException exception) { 
            return new CommonResult(2020, "自定义限流处理信息....CustomerBlockHandler---2");
        }
    
    }

**第三步：**

修改业务类RateLimitController

/** * blockHandler * blockHandler 对应处理 BlockException 的函数名称，可选项。 * blockHandler 函数访问范围需要是 public，返回类型需要与原方法相匹配， * 参数类型需要和原方法相匹配并且最后加一个额外的参数，类型为 BlockException。 * * blockHandlerClass * blockHandler 函数默认需要和原方法在同一个类中，如果希望使用其他类的函数， * 则需要指定 blockHandlerClass 为对应的类的 Class 对象，注意对应的函数必需为 static 函数，否则无法解析。 * @return */   
    @GetMapping("/rateLimit/customerBlockHandler")
        @SentinelResource(value = "customerBlockHandler",
                blockHandlerClass = CustomerBlockHandler.class,
                blockHandler = "handlerException")
        public CommonResult customerBlockHandler() { 
            return new CommonResult(200, "按客戶自定义", new Payment(2020L, "serial003"));
        }
    }

**第四步**

Sentinel控制台配置  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 5]

## 2.服务熔断功能 ##

### 2.1sentinel整合ribbon+openFeign+fallback ###

### 2.2Ribbon系列 ###

#### 2.2.1启动nacos和sentinel ####

#### 2.2.2服务提供者9003/9004端口 ####

##### 2.2.2.1新建cloudalibaba-provider-payment #####

##### 2.2.2.2POM #####

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

##### 2.2.2.3YML #####

server:
      port: 9003
    
    spring:
      application:
        name: nacos-payment-provider
      cloud:
        nacos:
          discovery:
            server-addr: localhost:8848 #Nacos
    
    management:
      endpoints:
        web:
          exposure:
            include: '*'

##### 2.2.2.4主启动类 #####

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    /** * create date 2020-08-31 16:45 by niugang */
    @SpringBootApplication
    @EnableDiscoveryClient
    public class PaymentApplication { 
        public static void main(String[] args) { 
            SpringApplication.run(PaymentApplication.class, args);
        }
    
    }

##### 2.2.25业务类 #####

import com.niugang.entities.CommonResult;
    import com.niugang.entities.Payment;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.util.HashMap;
    import java.util.Map;
    
    /** * create date 2020-08-31 16:47 by niugang */
    @RestController
    public class PaymentController { 
    
    
        @Value("${server.port}")
        private String serverPort;
    
        public static Map<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;
        }
    
    }

##### 2.2.2.6测试地址 #####

[http://localhost:9003/paymentSQL/1][http_localhost_9003_paymentSQL_1]

#### 2.2.3服务消费者84 ####

##### 2.2.3.1新建cloudalibaba-consumer-nacos-order #####

##### 2.2.3.2POM #####

<dependencies>
            <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>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.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>

##### 2.2.3.3YAML #####

server:
      port: 84
    spring:
      application:
        name: nacos-order-consumer
      cloud:
        nacos:
          discovery:
            server-addr: localhost:8848
        sentinel:
          transport:
            dashboard: localhost:8080
            port: 8719

##### 2.2.3.4启动类 #####

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.client.loadbalancer.LoadBalanced;
    import org.springframework.context.annotation.Bean;
    import org.springframework.web.client.RestTemplate;
    
    /** * create date 2020-08-31 16:57 by niugang */
    @SpringBootApplication
    @EnableDiscoveryClient
    public class OrderApplication
    { 
        public static void main(String[] args) { 
            SpringApplication.run(OrderApplication.class, args);
        }
    
        @Bean
        @LoadBalanced
        public RestTemplate getRestTemplate()
        { 
            return new RestTemplate();
        }
    
    }

##### 2.2.3.5业务类 #####

import com.niugang.entities.CommonResult;
    import com.niugang.entities.Payment;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
    
    import javax.annotation.Resource;
    
    
    /** * create date 2020-08-31 16:58 by niugang */
    @RestController
    @Slf4j
    public class OrderController { 
    
        public static final String SERVICE_URL = "http://nacos-payment-provider";
    
        @Resource
        private RestTemplate restTemplate;
    
    
    
        @RequestMapping("/consumer/fallback/{id}")
        //@SentinelResource(value = "fallback") //没有配置
        //@SentinelResource(value = "fallback",fallback = "handlerFallback") //fallback只负责业务异常
        //@SentinelResource(value = "fallback",blockHandler = "blockHandler") //blockHandler只负责sentinel控制台配置违规
        @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,非法参数异常....");
            }else if (result.getData() == null) { 
                throw new NullPointerException ("NullPointerException,该ID没有对应记录,空指针异常");
            }
    
            return result;
        }
    
        //fallback
        public CommonResult handlerFallback(@PathVariable  Long id,Throwable e) { 
            Payment payment = new Payment(id,"null");
            return new CommonResult<>(444,"兜底异常handlerFallback,exception内容 "+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,无此流水: blockException "+blockException.getMessage(),payment);
        }
    
    
    }

##### 2.2.3.6测试 #####

**目的**

fallback管运行异常

blockHandler管配置违规

**测试地址**

[http://localhost:84/consumer/fallback/1][http_localhost_84_consumer_fallback_1]

**没有任何配置**

@RestController
    @Slf4j
    public class OrderController
    { 
        public static final String SERVICE_URL = "http://nacos-payment-provider";
    
        @Resource
        private RestTemplate restTemplate;
    
        @RequestMapping("/consumer/fallback/{id}")
        @SentinelResource(value = "fallback")
    
        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,非法参数异常....");
            }else if (result.getData() == null) { 
                throw new NullPointerException ("NullPointerException,该ID没有对应记录,空指针异常");
            }
    
            return result;
        }

给客户error页面，不友好

**只配置fallback**

访问地址：[http://localhost:84//consumer/fallback/44][http_localhost_84_consumer_fallback_44]  
![在这里插入图片描述][20200901145037408.png_pic_center]  
访问地址：http://localhost:84//consumer/fallback/4  
![在这里插入图片描述][20200901145108737.png_pic_center]  
**只配置blockHandler**  
访问地址：[http://localhost:84//consumer/fallback/44][http_localhost_84_consumer_fallback_44]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 6]  
访问地址：http://localhost:84//consumer/fallback/4  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 7]  
访问地址：[http://localhost:84//consumer/fallback/1][http_localhost_84_consumer_fallback_1 1],点击多次，然后限流了。  
![在这里插入图片描述][20200901145222562.png_pic_center]**fallback和blockHandler都配置**  
![在这里插入图片描述][20200901145240250.png_pic_center]  
**忽略属性…**

以下配置为忽略IllegalArgumentException  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 8]

### 2.3Fegin ###

#### 2.3.1新建cloudalibaba-consumer-nacos-order-feign ####

#### 2.3.2POM ####

<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>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.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>

#### 2.3.3YAML ####

#### 2.3.4启动类 ####

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.openfeign.EnableFeignClients;
    
    
    /** * create date 2020-08-31 16:57 by niugang */
    @SpringBootApplication
    @EnableDiscoveryClient
    //添加@EnableFeignClients启动Feign的功能
    @EnableFeignClients
    public class OrderApplicationV2
    { 
        public static void main(String[] args) { 
            SpringApplication.run(OrderApplicationV2.class, args);
        }
    
    }

#### 2.3.5带@FeignClient注解的业务接口 ####

import com.niugang.entities.CommonResult;
    import com.niugang.entities.Payment;
    import com.niugang.fallback.PaymentFallbackService;
    import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    
    /** * create date 2020-08-31 17:31 by niugang */
    @FeignClient(value = "nacos-payment-provider",fallback = PaymentFallbackService.class)
    public interface PaymentService
    { 
        @GetMapping(value = "/paymentSQL/{id}")
        CommonResult<Payment> paymentSQL(@PathVariable("id") Long id);
    }

#### 2.3.6Fegin中fallback ####

import com.niugang.entities.CommonResult;
    import com.niugang.entities.Payment;
    import com.niugang.service.PaymentService;
    import org.springframework.stereotype.Component;
    
    /** * create date 2020-08-31 17:32 by niugang */
    @Component
    public class PaymentFallbackService implements PaymentService
    { 
        @Override
        public CommonResult<Payment> paymentSQL(Long id)
        { 
            return new CommonResult<>(44444,"服务降级返回,---PaymentFallbackService",new Payment(id,"errorSerial"));
        }
    }

#### 2.3.7测试 ####

http://lcoalhost:84/consumer/paymentSQL/1

测试84调用9003，此时故意关闭9003微服务提供者，看84消费侧自动降级，不会被耗死

### 2.4熔断框架比较 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 9]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 10]\#\# 3.规则持久化

### 3.1是什么 ###

一旦我们重启应用，Sentinel规则将消失，生产环境需要将配置规则进行持久化

### 3.2怎么用 ###

将限流配置规则持久化进Nacos保存，只要刷新某个rest地址，sentinel控制台的流控规则就能看到，只要Nacos里面的配置不删除，针对Sentinel上的流控规则持续有效。

### 3.3步骤 ###

#### 3.3.1新建cloudalibaba-sentinel-service-persistence模块 ####

#### 3.3.2POM ####

<dependencies>
            <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.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.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>

#### 3.3.2YAML ####

相比之前，主要是添加nacos数据源

server:
      port: 8401
    spring:
      application:
        name: cloudalibaba-sentinel-service
      cloud:
        nacos:
          discovery:
            server-addr: localhost:8848
        sentinel:
          transport:
            dashboard: localhost:8080 # 仪表板地址
            port: 8719 #sentinel api端口 默认8719，假如被占用了会自动从8719开始依次+1扫描。直至找到未被占用的端口
          datasource: # 目前支持redis、apollo、zookeeper,file.nacos
               db1:
                 nacos:
                    server-addr: localhost:8848 #
                    dataId: ${ spring.application.name} # 可以设置为${spring.application.name},fa'm
                    groupId: DEFAULT_GROUP
                    dataType: json #配置项得内容格式
                    ruleType: flow #数据源规则属于哪一类
    management:
      endpoints:
        web:
          exposure:
            include: '*'

#### 3.3.3业务类 ####

import com.alibaba.csp.sentinel.annotation.SentinelResource;
    import com.niugang.entities.CommonResult;
    import com.niugang.entities.Payment;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /** * create date 2020-08-31 15:33 by niugang */
    @RestController
    public class RateLimitController { 
    
    
        @GetMapping("/rateLimit/byUrl")
        @SentinelResource(value = "byUrl")
        public CommonResult byUrl() { 
            return new CommonResult(200, "urlOK", new Payment(2020L, "serial002"));
        }
    
    }

#### 3.3.4Nacos添加配置 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 11]

[
        { 
             "resource": "/rateLimit/byUrl",
             "limitApp": "default",
             "grade":   1,
             "count":   1,
             "strategy": 0,
             "controlBehavior": 0,
             "clusterMode": false    
        }
    ]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 12]

#### 3.3.5启动服务请求URL,sentinel发现业务规则有了 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 13]

#### 3.3.6快速访问测试接口 ####

![在这里插入图片描述][20200901145503105.png_pic_center]

#### 3.3.7停止8401再看sentinel ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 14]

#### 3.3.8重新启动8401再看sentinel ####

扎一看还是没有，稍等一会儿

http://localhost:8401/rateLimit/byUrl 多次调用

重新配置出现了，持久化验证通过  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70]

[https_github.com_alibaba_Sentinel_wiki_E6_B3_A8_E8_A7_A3_E6_94_AF_E6_8C_81]: https://github.com/alibaba/Sentinel/wiki/%E6%B3%A8%E8%A7%A3%E6%94%AF%E6%8C%81
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/5ed7dbf7390d408dbd43ed7a538f564d.png
[20200901144738992.png_pic_center]: /images/20221123/58b9930092bb47ab8198e63dd35df6d4.png
[2020090114475489.png_pic_center]: /images/20221123/4634160c18db48fa91b20d04395f83dd.png
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[20200901144837790.png_pic_center]: /images/20221123/1cd50a22aa5c476eb6f84d36d5f08796.png
[http_localhost_8401_rateLimit_byUrl]: http://localhost:8401/rateLimit/byUrl
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 3]: /images/20221123/fb6460882b144e4f8fee6cfa91f297b2.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 4]: /images/20221123/1add9505014a45b79b31b70cd35bf518.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 5]: /images/20221123/65658a7da9634b62b5e52ac4f9819163.png
[http_localhost_9003_paymentSQL_1]: http://localhost:9003/paymentSQL/1
[http_localhost_84_consumer_fallback_1]: http://localhost:84/consumer/fallback/1
[http_localhost_84_consumer_fallback_44]: http://localhost:84//consumer/fallback/44
[20200901145037408.png_pic_center]: /images/20221123/becfb20e64344814bc098f6c49ee6113.png
[20200901145108737.png_pic_center]: /images/20221123/899fa8e303654fffbf16a1c099caa6ac.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25pdWdhbmcwOTIw_size_16_color_FFFFFF_t_70_pic_center 7]: /images/20221123/32ff394725f043248ceff9d47de37688.png
[http_localhost_84_consumer_fallback_1 1]: http://localhost:84//consumer/fallback/1
[20200901145222562.png_pic_center]: /images/20221123/64e96490a1454c1b8fd070377a444b72.png
[20200901145240250.png_pic_center]: /images/20221123/c64ce6d9b76a4f79af1b7dc523f2d2a4.png
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[20200901145503105.png_pic_center]: /images/20221123/6643945f5a6146d9a681531cd355a15b.png
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