【SpringCloud 2021.0.0】11、Hystrix + Dashboard 流监控 (spring-boot 2.6.3)_spring-cloud 2021 @enablehystrix

• 新版本中有一些更新，如果还用旧版本的方式，会有不少问题
• 当前版本：spring-cloud 2021.0.0，spring-boot 2.6.3，hystrix 和 dashboard 2.2.10

1、新建 dashboard模块

springcloud-consumer-hystrix-dashboard-9001 监控模块

1）导jar包

<!-- spring-cloud-starter-netflix-hystrix -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
    <!-- 版本号由父类 dependencyManagement 管理 -->
    <!-- <version>2.2.10.RELEASE</version> -->   
</dependency>
<!-- spring-cloud-starter-netflix-hystrix-dashboard -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
    <version>2.2.10.RELEASE</version>
</dependency>
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2）主启动类

@EnableHystrixDashboard 开启监控功能

@SpringBootApplication
@EnableHystrixDashboard
public class DepartmentConsumerDashboard_9001 {
    public static void main(String[] args) {
        SpringApplication.run(DepartmentConsumerDashboard_9001.class,args);
    }
}
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3）配置yml

proxy-stream-allow-list: "*" 在新版本中需要配置这个

server:
  port: 9001

hystrix:
  dashboard:
    proxy-stream-allow-list: "*"
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2、修改熔断服务提供者模块

被监控的方法需要有熔断功能

1）必备jar包

actuator、hystrix

<!-- actuator完善监控信息 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- spring-cloud-starter-netflix-hystrix -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
</dependency>
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2）主启动类

在主启动类中添加如下方法：

两个方法选一个就可以

@Bean
public ServletRegistrationBean hystrixMetricsStreamServlet() {
    ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new HystrixMetricsStreamServlet());
    // 监控服务的地址
    servletRegistrationBean.addUrlMappings("/actuator/hystrix.stream");
    return servletRegistrationBean;
}

/*    @Bean
    public ServletRegistrationBean<HystrixMetricsStreamServlet> getServlet() {
        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
        ServletRegistrationBean<HystrixMetricsStreamServlet> registrationBean = new ServletRegistrationBean<>(streamServlet);
        registrationBean.setLoadOnStartup(1);
        registrationBean.addUrlMappings("/actuator/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }*/
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• 主启动类上不需要再添加新注解
• application.yml 中不需要增加配置；不用设为 include: "*"

# 监控端口配置
management:
  endpoints:
    web:
      exposure:
        # 开启 info,health；新版本中只默认开启了 health
        include: info,health
        # 
        #include: "*"
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3、测试

启动

熔断服务提供者

监控页

4、总结

需要注意的几个点

• 监控模块的yml中要配置 proxy-stream-allow-list: "*"
• 被监控的方法要有 熔断服务
• 监控页面填写流地址时用 主机名，不要用ip