java - 将应用程序迁移到 Spring boot 2 后，无法将 hystrix 指标公开给/actuator/prometheus

Question

在将我的应用程序(stack spring boot、camel、hystrix)从 spring boot 1.5 迁移到 spring boot 2 之后。我无法让 hystrix 指标显示在/actuator/prometheus 中。

正如许多解决方案和教程所建议的那样，我已确定我具有以下依赖项

<dependency>
   <groupId>io.micrometer</groupId>
   <artifactId>micrometer-registry-prometheus</artifactId>
   <version>${micrometer-version}</version>
</dependency>
<dependency>
   <groupId>io.micrometer</groupId>
   <artifactId>micrometer-core</artifactId>
   <version>${micrometer-version}</version>
</dependency>

并添加了以下配置类，我确定它正在被实例化，正如我在 spring boot 自动配置日志中检查的那样:

import io.micrometer.core.instrument.binder.hystrix.HystrixMetricsBinder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class HystrixMetricsConfig {

   @Bean
   HystrixMetricsBinder registerHystrixMetricsBinder() {
      return new HystrixMetricsBinder();
   }
}

为了避免假设此类教程/答案在定义上是正确的，我使用简单的 Controller 、hystrix 和上述依赖项从头开始设置了一个简单的 spring boot 项目，指标确实出现在/actuator/prometheus 中，无需额外步骤。

我的应用程序比简单项目有更多的依赖项，所以我认为其他东西可能会覆盖/禁用指标绑定(bind)。

[...]
<dependencies>

   <!-- Spring Boot -->
   <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
   </dependency>
   <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
      <exclusions>
         <exclusion>
            <groupId>om.netflix.archaius</groupId>
            <artifactId>archaius-core</artifactId>
         </exclusion>
      </exclusions>
   </dependency>
   <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
   </dependency>
   <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-thymeleaf</artifactId>
   </dependency>     
   <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-config-server</artifactId>
   </dependency>
   <dependency>
      <groupId>org.springframework.security</groupId>
      <artifactId>spring-security-web</artifactId>
   </dependency>

   <dependency>
      <groupId>org.jolokia</groupId>
      <artifactId>jolokia-core</artifactId>
   </dependency>



   <!-- Camel -->
   <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-spring-boot-starter</artifactId>
   </dependency>
   <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-spring-security</artifactId>
  </dependency>
   <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-swagger-java-starter</artifactId>
   </dependency>
   <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-servlet-starter</artifactId>
   </dependency>
   <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-http4</artifactId>
   </dependency>
   <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-spring</artifactId>
   </dependency>
   <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-hystrix-starter</artifactId>
   </dependency>
   <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-metrics</artifactId>
   </dependency>     
   <!-- Spring Framework Caching Support -->
   <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-cache</artifactId>
   </dependency>
   <dependency>
      <groupId>com.hazelcast</groupId>
      <artifactId>hazelcast</artifactId>
   </dependency>
   <dependency>
      <groupId>com.hazelcast</groupId>
      <artifactId>hazelcast-spring</artifactId>
   </dependency>
   <!-- logging -->
   <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
   </dependency>
   <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-core</artifactId>
   </dependency>
   <dependency>
      <groupId>net.logstash.logback</groupId>
      <artifactId>logstash-logback-encoder</artifactId>
      <scope>compile</scope>
   </dependency>
   <dependency>
       <groupId>org.apache.ws.security</groupId>
       <artifactId>wss4j</artifactId>
   </dependency>     
   <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
   </dependency>         
   <!-- Test -->
   <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
   </dependency>
   <dependency>
      <groupId>org.apache.camel</groupId>
      <artifactId>camel-test</artifactId>
      <scope>test</scope>
   </dependency>
   <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <scope>provided</scope>
   </dependency>
   <!-- stream -->       
   <dependency>
      <groupId>com.netflix.archaius</groupId>
      <artifactId>archaius-core</artifactId>
      <version>0.7.6</version>
   </dependency>
   <dependency>
      <groupId>io.micrometer</groupId>
     <artifactId>micrometer-registry-prometheus</artifactId>
   </dependency>
   <dependency>
      <groupId>io.micrometer</groupId>
      <artifactId>micrometer-core</artifactId>
   </dependency>
   <dependency>
      <groupId>org.reactivestreams</groupId>
      <artifactId>reactive-streams</artifactId>
      <version>1.0.2</version>
   </dependency>
</dependencies>
[...]

除了被告知实际问题是什么，我还在努力了解如何解决此类问题。是否可以激活任何千分尺/Spring 启动日志(自动配置报告除外)以了解发生了什么？

Answer 1

在遵循了整个自定义 hystrix 指标绑定(bind)过程之后，我最终发现一切都得到了正确的绑定(bind)，至少在原则上是这样。

然后，我尝试在第一次执行 hystrix 命令时触发一个断点，以检查注册表和发布者发生了什么。在方法中放置断点

HystrixMetricsPublisherThreadPool getPublisherForThreadPool(HystrixThreadPoolKey threadPoolKey, HystrixThreadPoolMetrics metrics, HystrixThreadPoolProperties properties)

HystrixMetricsPublisherFactory 类，我发现 HystrixPlugins 实例在设置发布者的时刻是不同的。检查应用程序的所有代码后，我发现要设置自定义事件通知程序，实例会被重置。

@EventListener(ApplicationReadyEvent.class)
    public void doAfterStartup() {
        Hystrix.reset();
        registerCustomHystrixEventNotifier(circuitBreakerHystrixEventNotifier);
        logger.info("hello world, application started up");
    }

然后我修改了方法以注册事件通知程序，而没有重置之前配置的自动配置，并且 hystrix 指标现在显示在 prometheus 端点中。