在 Dropwizard 中公开 Prometheus 指标

Question

我已经使用Dropwizard实现了一个 Java Web 服务。现在我希望它也公开Prometheus metrics。我遵循了这个非常直接的例子。但是，位于http://localhost:9090/metrics的端点仍未公开。这是相关的代码：中的依赖项pom.xml：    <dependency>        <groupId>io.prometheus</groupId>        <artifactId>simpleclient_dropwizard</artifactId>        <version>0.5.0</version>    </dependency>    <!-- https://mvnrepository.com/artifact/io.prometheus/simpleclient_servlet -->    <dependency>        <groupId>io.prometheus</groupId>        <artifactId>simpleclient_servlet</artifactId>        <version>0.5.0</version>    </dependency>Java代码：import io.dropwizard.Application;import io.dropwizard.setup.Bootstrap;import io.dropwizard.setup.Environment;import io.prometheus.client.CollectorRegistry;import io.prometheus.client.dropwizard.DropwizardExports;import io.prometheus.client.exporter.MetricsServlet;[...]public class MyApplication extends Application<MyServiceConfiguration> {@Overridepublic void run(final MyServiceConfiguration configuration,        final Environment environment) {    final MyServiceResource resource = createResource(configuration);    environment.jersey().register(resource);    registerHealthChecks(environment, resource);    registerMetrics(environment);}private void registerMetrics(Environment environment) {    CollectorRegistry collectorRegistry = new CollectorRegistry();    collectorRegistry.register(new DropwizardExports(environment.metrics()));    environment.admin().addServlet("metrics", new MetricsServlet(collectorRegistry))            .addMapping("/metrics");}任何指向我做错了什么的指针？

Answer 1

记住默认 dropwizard 配置在不同的端口上有管理应用程序。您可以在那里找到指标 servlet。