GraalVM原生图像jvm指标

Question

运行Micronaut应用程序的本机映像时，检索Prometheus指标失败，因为它无法获取jvm指标。

当然，本机映像预编译应用程序并仅包括实际使用的内容，但运行本机映像时使用的是哪种JVM？我认为它也是标准热点虚拟机的一个大大简化的版本。

那么，在运行本机映像时，是否有可能获取jvm指标，或者是否应该使用其他方法来检索正在运行的应用程序的cpu和内存统计信息？

在这种情况下，我使用了Micronaut，但我侦察它通常用于从任何具有普罗米修斯指标的本机映像应用程序获取指标。

复制：

- install Micronaut cli (e.g. via Homebrew on Mac)
- install GraalVM 19.2.0 (e.g. via Sdkman on Mac)
- install GraalVM native-image tool: gu install native-image
- create application: mn create-app --features=management,micrometer-prometheus,graal-native-image --build maven metrics-graalvm-image
- update src/main/resources/application.yml to allow anonymous access to prometheus endpoint:

endpoints:
  all:
    enabled: true
    sensitive: false

- run application: man exec:exec
- check prometheus metrics can be retrieved: open http://localhost:8080/prometheus
- build application: mvn clean verify
- create native image: native-image --no-server -jar target/metrics-graalvm-image-0.1.jar
- run native image: ./metrics-graalvm-image
- get prometheus metrics: open http://localhost:8080/prometheus

否对于本机映像，将引发以下异常：

11:06:51.186 [pool-2-thread-4] ERROR i.m.h.s.netty.RoutingInBoundHandler - Unexpected error occurred: ThreadMXBean methods
com.oracle.svm.core.jdk.UnsupportedFeatureError: ThreadMXBean methods
    at com.oracle.svm.core.util.VMError.unsupportedFeature(VMError.java:102)
    at com.oracle.svm.core.jdk.SubstrateThreadMXBean.getAllThreadIds(ManagementSupport.java:448)
    at io.micrometer.core.instrument.binder.jvm.JvmThreadMetrics.getThreadStateCount(JvmThreadMetrics.java:85)
    at io.micrometer.core.instrument.binder.jvm.JvmThreadMetrics.lambda$bindTo$0(JvmThreadMetrics.java:75)
    at io.micrometer.core.instrument.internal.DefaultGauge.value(DefaultGauge.java:40)
    at io.micrometer.prometheus.PrometheusMeterRegistry.lambda$newGauge$3(PrometheusMeterRegistry.java:245)
    at io.micrometer.prometheus.MicrometerCollector.collect(MicrometerCollector.java:69)
    at io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.findNextElement(CollectorRegistry.java:183)
    at io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.nextElement(CollectorRegistry.java:216)
    at io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.nextElement(CollectorRegistry.java:137)
    at io.prometheus.client.exporter.common.TextFormat.write004(TextFormat.java:22)
    at io.micrometer.prometheus.PrometheusMeterRegistry.scrape(PrometheusMeterRegistry.java:95)
    at io.micrometer.prometheus.PrometheusMeterRegistry.scrape(PrometheusMeterRegistry.java:80)
    at io.micronaut.configuration.metrics.micrometer.prometheus.management.PrometheusEndpoint.scrape(PrometheusEndpoint.java:52)
    at io.micronaut.configuration.metrics.micrometer.prometheus.management.$PrometheusEndpointDefinition$$exec1.invokeInternal(Unknown Source)
    at io.micronaut.context.AbstractExecutableMethod.invoke(AbstractExecutableMethod.java:144)
    at io.micronaut.context.DefaultBeanContext$BeanExecutionHandle.invoke(DefaultBeanContext.java:2792)
    at io.micronaut.web.router.AbstractRouteMatch.execute(AbstractRouteMatch.java:235)
    at io.micronaut.web.router.RouteMatch.execute(RouteMatch.java:122)
    at io.micronaut.http.server.netty.RoutingInBoundHandler.lambda$buildResultEmitter$19(RoutingInBoundHandler.java:1408)
    at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:71)
    at io.reactivex.Flowable.subscribe(Flowable.java:14918)
    at io.reactivex.Flowable.subscribe(Flowable.java:14865)
    at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
    at io.reactivex.Flowable.subscribe(Flowable.java:14918)
    at io.reactivex.internal.operators.flowable.FlowableMap.subscribeActual(FlowableMap.java:37)
    at io.reactivex.Flowable.subscribe(Flowable.java:14918)
    at io.reactivex.Flowable.subscribe(Flowable.java:14865)
    at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
    at io.reactivex.Flowable.subscribe(Flowable.java:14918)
    at io.reactivex.internal.operators.flowable.FlowableSwitchIfEmpty.subscribeActual(FlowableSwitchIfEmpty.java:32)
    at io.reactivex.Flowable.subscribe(Flowable.java:14918)
    at io.reactivex.Flowable.subscribe(Flowable.java:14865)
    at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
    at io.reactivex.Flowable.subscribe(Flowable.java:14918)
    at io.reactivex.Flowable.subscribe(Flowable.java:14868)
    at io.micronaut.http.context.ServerRequestTracingPublisher.lambda$subscribe$0(ServerRequestTracingPublisher.java:52)
    at io.micronaut.http.context.ServerRequestContext.with(ServerRequestContext.java:52)
    at io.micronaut.http.context.ServerRequestTracingPublisher.subscribe(ServerRequestTracingPublisher.java:52)
    at io.micronaut.configuration.metrics.binder.web.WebMetricsPublisher.subscribe(WebMetricsPublisher.java:122)
    at io.reactivex.internal.operators.flowable.FlowableFromPublisher.subscribeActual(FlowableFromPublisher.java:29)
    at io.reactivex.Flowable.subscribe(Flowable.java:14918)
    at io.reactivex.Flowable.subscribe(Flowable.java:14865)
    at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
    at io.reactivex.Flowable.subscribe(Flowable.java:14918)
    at io.reactivex.Flowable.subscribe(Flowable.java:14865)
    at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
    at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker$BooleanRunnable.run(ExecutorScheduler.java:288)
    at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker.run(ExecutorScheduler.java:253)
    at io.micrometer.core.instrument.composite.CompositeTimer.record(CompositeTimer.java:79)
    at io.micrometer.core.instrument.Timer.lambda$wrap$0(Timer.java:144)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
    at com.oracle.svm.core.thread.JavaThreads.threadStartRoutine(JavaThreads.java:460)
    at com.oracle.svm.core.posix.thread.PosixJavaThreads.pthreadStartRoutine(PosixJavaThreads.java:193)

Answer 1

独立可执行文件中的GraalVMnative-image使用子策略VM-部分VM。

您可以在此处的官方GitHub存储库中找到有关它的更多详细信息。

此外，根据 SubstrateVM 限制文档，不支持 Java 提供的标准管理和调试接口。这是因为它们需要访问 Java 字节码，而对于本机映像，在运行时不再可用。