访问 Spring Boot 指标端点的问题

Posted 2023-02-16

【中文标题】访问 Spring Boot 指标端点的问题

【英文标题】：Problem accessing spring boot metric endpoint

【发布时间】：2019-09-21 01:37:24

【问题描述】：

当我添加以下类时，我无法访问 /metrics 端点 -

ExporterRegister.class

public class ExporterRegister 
    private List<Collector> collectors;

    public ExporterRegister(List<Collector> collectors) 
        for (Collector collector : collectors) 
            collector.register();
        
        this.collectors = collectors;
    

    public List<Collector> getCollectors() 
        return collectors;
    
 

CollectorRegistry.class

@Configuration
@ConditionalOnClass(CollectorRegistry.class)
public class MetricController 
    private static final CollectorRegistry metricRegistry = CollectorRegistry.defaultRegistry;

    @Bean
    ServletRegistrationBean registerPrometheusExporterServlet() 
        return new ServletRegistrationBean(new MetricsServlet(metricRegistry), new String[]"/metrics");

    

    @Bean
    ExporterRegister exporterRegister() 
        List<Collector> collectors = new ArrayList<>();
        collectors.add(new StandardExports());
        collectors.add(new MemoryPoolsExports());
        collectors.add(new GarbageCollectorExports());
        collectors.add(new ThreadExports());
        ExporterRegister register = new ExporterRegister(collectors);
        return register;
    

我使用的是 spring boot 2.1.4 版本，以下是我在 pom.xml 中使用的 prometheus 依赖项

<dependency>
        <groupId>io.prometheus</groupId>
        <artifactId>simpleclient</artifactId>
            <version>0.6.0</version>
        </dependency>

        <dependency>
        <groupId>io.prometheus</groupId>
        <artifactId>simpleclient_spring_boot</artifactId>
        <version>0.6.0</version>
        </dependency>

        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_hotspot</artifactId>
            <version>0.6.0</version>
        </dependency>

        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_servlet</artifactId>
            <version>0.6.0</version>
        </dependency>

我的应用程序属性 -

 server.servlet.context-path=/something
server.error.whitelabel.enabled = true

#overriding old spring beans with newer version
spring.main.allow-bean-definition-overriding=true


#enable console logs
logging.level.org.apache.http.wire=DEBUG



#Metrics related config
management.endpoint.metrics.enabled=true
management.endpoint.prometheus.enabled=true
management.metrics.export.prometheus.enabled=true
management.endpoints.web.exposure.include=*
management.endpoint.health.show-details=always
management.endpoint.beans.enabled=false
management.endpoint.info.enabled=true
management.endpoints.enabled-by-default=true
management.server.port=8081

当我尝试访问此网址时 - http://localhost:8080/something/metrics 我收到 404 未找到

【参考方案1】：

默认情况下，所有执行器端点都映射在/actuator 下。使用/something 的上下文路径，这意味着指标端点将在/something/actuator/metrics 可用。

【讨论】：

所以我出于某种原因在此处添加了此属性，当我访问时找不到 404 - localhost:8080/something/actuator/metrics 但是当我添加 management.server.port=8081 并尝试访问 localhost:8081/actuator/metrics 然后我能够看到指标。我在上面添加了 management.properties