3

我是千分尺普罗米修斯的新手,我正在尝试构建我的第一个hello-world应用程序,使用千分尺和普罗米修斯作为监控后端进行监控。但我看不到我的应用程序(Counters 和Timers)出现在 prometheus 端点上的指标。

我正在关注教程的普罗米修斯。我也跟着这个视频开始使用千分尺。

我从这个链接下载了 prometheus ,解压了它,然后运行 ​​prometheus 以使用以下命令进行抓取:./prometheus --config.file=prometheus.yml. 我在此配置文件中将目标设置为targets: ['localhost:9090']

然后我运行了我的 Main 类,如下所示:

import cern.jet.random.Normal;
import cern.jet.random.engine.MersenneTwister64;
import cern.jet.random.engine.RandomEngine;
import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.Gauge;
import io.micrometer.core.instrument.Timer;
import io.micrometer.core.instrument.composite.CompositeMeterRegistry;
import io.micrometer.core.instrument.logging.LoggingMeterRegistry;
import io.micrometer.jmx.JmxMeterRegistry;
import io.micrometer.prometheus.PrometheusMeterRegistry;
import reactor.core.publisher.Flux;

import java.time.Duration;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

public class Main {

    public static void main(String[] args) throws InterruptedException {
        CompositeMeterRegistry compositeMeterRegistry = new CompositeMeterRegistry();

        LoggingMeterRegistry loggingMeterRegistry = SampleMeterRegistries.loggingMeterRegistry();
        JmxMeterRegistry jmxMeterRegistry = SampleMeterRegistries.jmxMeterRegistry();
//        AtlasMeterRegistry atlasMeterRegistry = SampleMeterRegistries.atlasMeterRegistry();
        PrometheusMeterRegistry prometheusMeterRegistry = SampleMeterRegistries.prometheus();

        compositeMeterRegistry.add(loggingMeterRegistry);
        compositeMeterRegistry.add(jmxMeterRegistry);
//        compositeMeterRegistry.add(atlasMeterRegistry);
        compositeMeterRegistry.add(prometheusMeterRegistry);


        AtomicInteger latencyForThisSecond = new AtomicInteger(0);
        Gauge gauge = Gauge.builder("my.guage", latencyForThisSecond, n -> n.get())
                .register(compositeMeterRegistry);

        Counter counter = Counter
                .builder("my.counter")
                .description("some description")
                .tags("dev", "performance")
                .register(compositeMeterRegistry);

        Timer timer = Timer.builder("timer")
                .publishPercentileHistogram()
                .sla(Duration.ofMillis(270))
                .register(compositeMeterRegistry);

        // colt/colt/1.2.0 is to be added for this.
        RandomEngine randomEngine = new MersenneTwister64(0);
        Normal incomingRequests = new Normal(0, 1, randomEngine);
        Normal duration = new Normal(250, 50, randomEngine);

        latencyForThisSecond.set(duration.nextInt());

        // For Flux you require io.projectreactor/reactor-core/3.2.3.RELEASE
        Flux.interval(Duration.ofSeconds(1))
                .doOnEach(d -> {
                    if (incomingRequests.nextDouble() + 0.4 > 0) {
                        timer.record(latencyForThisSecond.get(), TimeUnit.MILLISECONDS);
                    }
                }).blockLast();

    }
}

当我运行时./prometheus --config.file=prometheus.yml,我可以访问端点http://localhost:9090/metrics,也可以访问http://localhost:9090/graph。但是当我尝试对其执行查询http://localhost:9090/graph sum(timer_duration_seconds_sum) / sum(timer_duration_seconds_count)时说no datapoints found

在我看来,我缺少一些明显的东西(因为我是这两个主题的初学者)。

有人可以指出我缺少什么吗?

我找不到(在我的 Main 类中的哪个位置)我必须配置 URI 才能为 prometheus 发布。即使我要发布到http://localhost:9090(可能默认隐藏在千分尺的某个地方),我也找不到它。

4

1 回答 1

4

目标:['localhost:9090']

那是普罗米修斯被要求刮自己。

您需要为 Java 应用程序的 HTTP 端点添加一个目标。

于 2019-01-02T11:48:04.853 回答