Spring-Cloud的Feign插件、Hystrix DashBoard监控、Sentinel替换Hystrix降级

你的名字 2023-10-05 10:24 2阅读 0赞

#### Feign 简化服务调用 ####

*  Feign优化调用
 *   *  1. 添加依赖
     *  2. 在feign包下创建一个接口
     *  3. 在启动类添加注解
     *  4. 修改 UserServiceImpl 实现类
 *  Feign实现服务熔断
 *   *  1. 在 application.yml 配置文件中添加一个节点
     *  2. 实现 feign 包下的接口
     *  3. 修改接口注解
 *  搭建Hystrix DashBoard监控
 *   *  1. 新建 dashboard-server 模块
     *  2. 添加依赖
     *  3. 创建 application.yml 配置文件
     *  4. 新建启动类并添加注解
     *  5. 在需要监控的模块下添加依赖
     *  6. 在 application.yml 下添加节点
     *  7. 在启动类上添加注解
     *  8. 在需要监测的方法上添加注解
     *  9. 在浏览器访问
 *  断路器聚合监控 Turbine
 *   *  1. 在 dashboard 服务下添加依赖
     *  2. 在 application.yml 下添加配置节点
     *  3. 在启动类上添加注解
     *  4. 重启 dashboard 服务，在首页访问
 *  Sentinel替换Hystrix熔断
 *   *  1. 下载jar包
     *  2. 在下载好的目录下进入DOS页面输入指令启动服务
     *  3. 在网页访问\[http://localhost:10000/\](http://localhost:10000/)!\[在这里插入图片描述\](https://img-blog.csdnimg.cn/20200924115445512.png?x-oss-process=image/watermark,type\_ZmFuZ3poZW5naGVpdGk,shadow\_10,text\_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA==,size\_16,color\_FFFFFF,t\_70\#pic\_center)
     *  4. 在模块中接入控制台
     *   *  I. 添加依赖
         *  II. 在 application.yml 中添加配置节点
         *  III. 在实现类中添加熔断注解和假数据方法
         *  IV. 在网页控制台上查看监控

## Feign优化调用 ##

在服务调用模块上（user-server）

### 1. 添加依赖 ###

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

### 2. 在feign包下创建一个接口 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center]  
**方法名和服务提供模块(order-server)暴露的API接口一样**

package com.ddz.feigns;
    
    import com.ddz.entity.Order;
    import com.ddz.feigns.impl.OrderFeignClientFallback;
    import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    
    import java.util.List;
    
    @FeignClient(name = "order-server", fallback = OrderFeignClientFallback.class)
    public interface OrderFeignClient {
        
    
        @GetMapping(value = "/findOrderByUser/{uid}")
        public List<Order> findOrderByUser(@PathVariable Integer uid);
    }

### 3. 在启动类添加注解 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 1]

### 4. 修改 UserServiceImpl 实现类 ###

package com.ddz.service.impl;
    
    import com.ddz.entity.Order;
    import com.ddz.feign.OrderFeignClient;
    import com.ddz.service.UserService;
    import org.springframework.stereotype.Service;
    import javax.annotation.Resource;
    import java.util.List;
    
    @Service
    public class UserServiceImpl implements UserService {
        
    
        @Resource
        private OrderFeignClient orderFeignClient;
    	/*  直接调用feign中的方法简化调用  */
        @Override
        public List<Order> findUserOrder(Integer uid) {
        
            return orderFeignClient.findOrderByUser(uid);
        }
    }

## Feign实现服务熔断 ##

SpringCloud Fegin默认已为Feign整合了hystrix，所以添加Feign依赖后就不用在添加hystrix

### 1. 在 application.yml 配置文件中添加一个节点 ###

![在这里插入图片描述][20200923213814921.jpg_pic_center]

### 2. 实现 feign 包下的接口 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 2]

package com.ddz.feigns.impl;
    
    import com.ddz.entity.Order;
    import com.ddz.feigns.OrderFeignClient;
    import org.springframework.stereotype.Component;
    import java.util.ArrayList;
    import java.util.List;
    
    @Component
    public class OrderFeignClientFallback implements OrderFeignClient {
        
        /**
         * 返回假数据方法
         */
        @Override
        public List<Order> findOrderByUser(Integer uid) {
        
            List<Order> list = new ArrayList<>();
            list.add(new Order(1, "Feign全局熔断", 0, 0.0));
            return list;
        }
    }

### 3. 修改接口注解 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 3]

## 搭建Hystrix DashBoard监控 ##

### 1. 新建 dashboard-server 模块 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 4]

### 2. 添加依赖 ###

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
            </dependency>

### 3. 创建 application.yml 配置文件 ###

server:
      port: 7004 #端口号
    eureka:
      client:
        service-url:
          defaultZone: http://localhost:7001/eureka/ #,http://localhost:7002/eureka/ #添加到的eureka注册中心的地址
      instance:
        prefer-ip-address: true #在eureka地址页面中显示微服务的ip地址和端口
        instance-id: ${
        spring.cloud.client.ip-address}:${
        server.port} #设置发送心跳时间间隔
        lease-renewal-interval-in-seconds: 5 #设置没有发送心跳 微服务在eureka中保存的最大时间
        lease-expiration-duration-in-seconds: 10
    spring:
      application:
        name: dashboard-server # 服务名称

### 4. 新建启动类并添加注解 ###

package com.ddz;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
    
    @SpringBootApplication
    @EnableHystrixDashboard//监测仪表盘
    public class MyDashboardServer {
        
        public static void main(String[] args) {
        
            SpringApplication.run(MyDashboardServer.class, args);
        }
        //    spring boot 2.0 以上版本需要指定 文件路径
    //    @Bean
    //    public ServletRegistrationBean getServlet() {
        
    //        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
    //        ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
    //        registrationBean.setLoadOnStartup(1);
    //        registrationBean.addUrlMappings("/hystrix.stream");
    //        registrationBean.setName("HystrixMetricsStreamServlet");
    //        return registrationBean;
    //    }
    }

spring boot 2.0 以上版本

### 5. 在需要监控的模块下添加依赖 ###

### 6. 在 application.yml 下添加节点 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 5]

management:
      endpoints:
        web:
          exposure:
            include: hystrix.stream

### 7. 在启动类上添加注解 ###

**@EnableCircuitBreaker**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 6]

### 8. 在需要监测的方法上添加注解 ###

**@HystrixCommand**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 7]

### 9. 在浏览器访问 ###

**localhost:端口号/hystrix.stream**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 8]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 9]

## 断路器聚合监控 Turbine ##

### 1. 在 dashboard 服务下添加依赖 ###

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

### 2. 在 application.yml 下添加配置节点 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 10]

turbine:
      app-config: user-server
      cluster-name-expression: "'default'"

### 3. 在启动类上添加注解 ###

\*\*@EnableTurbine \*\*  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 11]

### 4. 重启 dashboard 服务，在首页访问 ###

**localhost:Dashboard的端口/turbine.stream**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 12]

监测多个方法  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 13]

## Sentinel替换Hystrix熔断 ##

### 1. 下载jar包 ###

链接：[https://github.com/alibaba/Sentinel/releases/download/1.6.3/sentinel-dashboard-1.6.3.jar ][https_github.com_alibaba_Sentinel_releases_download_1.6.3_sentinel-dashboard-1.6.3.jar]

### 2. 在下载好的目录下进入DOS页面输入指令启动服务 ###

java -Dserver.port=10000 -Dcsp.sentinel.dashboard.server=localhost:10000 -
    Dproject.name=sentinel-dashboard -jar sentinel-dashboard-1.6.3.jar

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 14]

### 3. 在网页访问[http://localhost:10000/][http_localhost_10000]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 15] ###

### 4. 在模块中接入控制台 ###

#### I. 添加依赖 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 16]

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

<dependency>
                    <groupId>com.alibaba.cloud</groupId>
                    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                    <version>1.5.0.RELEASE</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>

#### II. 在 application.yml 中添加配置节点 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 17]

#### III. 在实现类中添加熔断注解和假数据方法 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 18]

#### IV. 在网页控制台上查看监控 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 19]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 13]: https://img-blog.csdnimg.cn/20201117230638174.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA==,size_16,color_FFFFFF,t_70#pic_center
[https_github.com_alibaba_Sentinel_releases_download_1.6.3_sentinel-dashboard-1.6.3.jar]: https://github.com/alibaba/Sentinel/releases/download/1.6.3/sentinel-dashboard-1.6.3.jar
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 14]: https://img-blog.csdnimg.cn/20200924115406369.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA==,size_16,color_FFFFFF,t_70#pic_center
[http_localhost_10000]: http://localhost:10000/
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 17]: https://img-blog.csdnimg.cn/20200924120405138.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA==,size_16,color_FFFFFF,t_70#pic_center
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA_size_16_color_FFFFFF_t_70_pic_center 18]: https://img-blog.csdnimg.cn/20200924120840414.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTYyNjI4OA==,size_16,color_FFFFFF,t_70#pic_center
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