Metrics not appearing at prometheus endpoint when I'm using micrometer's PrometheusMeterRegistry

I'm new to micrometer and prometheus and I'm trying to build my first hello-world application to be monitored using micrometer with prometheus as monitoring backend. But I can't see the metrics by my app (Counters and Timers) appearing on the prometheus endpoint.

I'm following this tutorial for prometheus. I also followed this video for getting started with micrometer.

I downloaded prometheus from this link, extracted it and then ran prometheus to scrap using the command: ./prometheus --config.file=prometheus.yml. I'm having target set in this config file as targets: ['localhost:9090']

Then I ran my Main class which looks like this:

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();



    }

}

When I run ./prometheus --config.file=prometheus.yml, I can access the endpoint http://localhost:9090/metrics and also http://localhost:9090/graph. But when I try to execute the query on http://localhost:9090/graph sum(timer_duration_seconds_sum) / sum(timer_duration_seconds_count) it says no datapoints found.

It seems to me that I'm missing something obvious (as I'm a beginner to both of these topics).

Can someone please point out what I'm missing?

I couldn't find (where in my Main class) I have to configure the URI to publish for prometheus. Even if I'm publishing to http://localhost:9090 (which might be default hidden somewhere by micrometer) I couldn't find it.

edited Jan 2 at 12:20

asked Jan 2 at 8:43

Lavish Kothari

865816

add a comment |

I'm following this tutorial for prometheus. I also followed this video for getting started with micrometer.

Then I ran my Main class which looks like this:

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();



    }

}

It seems to me that I'm missing something obvious (as I'm a beginner to both of these topics).

Can someone please point out what I'm missing?

edited Jan 2 at 12:20

asked Jan 2 at 8:43

Lavish Kothari

865816

add a comment |

I'm following this tutorial for prometheus. I also followed this video for getting started with micrometer.

Then I ran my Main class which looks like this:

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();



    }

}

It seems to me that I'm missing something obvious (as I'm a beginner to both of these topics).

Can someone please point out what I'm missing?

edited Jan 2 at 12:20

asked Jan 2 at 8:43

Lavish Kothari

865816

I'm following this tutorial for prometheus. I also followed this video for getting started with micrometer.

Then I ran my Main class which looks like this:

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();



    }

}

It seems to me that I'm missing something obvious (as I'm a beginner to both of these topics).

Can someone please point out what I'm missing?

java prometheus micrometer

edited Jan 2 at 12:20

asked Jan 2 at 8:43

Lavish Kothari

865816

edited Jan 2 at 12:20

asked Jan 2 at 8:43

Lavish Kothari

865816

edited Jan 2 at 12:20

asked Jan 2 at 8:43

Lavish Kothari

865816

asked Jan 2 at 8:43

Lavish Kothari

865816

asked Jan 2 at 8:43

Lavish Kothari

865816

add a comment |

1 Answer
1

active

oldest

votes

targets: ['localhost:9090']

That's Prometheus being asked to scrape itself.

You need to add a target for the Java application's HTTP endpoint.

answered Jan 2 at 11:48

brian-brazil

15.5k13040

@brain-brazil Thanks, that was helpful, now I'm also creating a HttpServer in my Main class as described here. This works for localhost:8080/metrics, but it also gives me the same web-page when I try to access localhost:8080/graph. How can I get the graphs something like this image?

– Lavish Kothari
Jan 2 at 12:16

1

You'll want to use Promethus for that, on localhost:9090

– brian-brazil
Jan 2 at 16:03

add a comment |

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1 Answer
1

active

oldest

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1 Answer
1

active

oldest

votes

targets: ['localhost:9090']

That's Prometheus being asked to scrape itself.

You need to add a target for the Java application's HTTP endpoint.

answered Jan 2 at 11:48

brian-brazil

15.5k13040

@brain-brazil Thanks, that was helpful, now I'm also creating a HttpServer in my Main class as described here. This works for localhost:8080/metrics, but it also gives me the same web-page when I try to access localhost:8080/graph. How can I get the graphs something like this image?

– Lavish Kothari
Jan 2 at 12:16

1

You'll want to use Promethus for that, on localhost:9090

– brian-brazil
Jan 2 at 16:03

add a comment |

targets: ['localhost:9090']

That's Prometheus being asked to scrape itself.

You need to add a target for the Java application's HTTP endpoint.

answered Jan 2 at 11:48

brian-brazil

15.5k13040

@brain-brazil Thanks, that was helpful, now I'm also creating a HttpServer in my Main class as described here. This works for localhost:8080/metrics, but it also gives me the same web-page when I try to access localhost:8080/graph. How can I get the graphs something like this image?

– Lavish Kothari
Jan 2 at 12:16

1

You'll want to use Promethus for that, on localhost:9090

– brian-brazil
Jan 2 at 16:03

add a comment |

targets: ['localhost:9090']

That's Prometheus being asked to scrape itself.

You need to add a target for the Java application's HTTP endpoint.

answered Jan 2 at 11:48

brian-brazil

15.5k13040

targets: ['localhost:9090']

That's Prometheus being asked to scrape itself.

You need to add a target for the Java application's HTTP endpoint.

answered Jan 2 at 11:48

brian-brazil

15.5k13040

answered Jan 2 at 11:48

brian-brazil

15.5k13040

answered Jan 2 at 11:48

brian-brazil

15.5k13040

answered Jan 2 at 11:48

brian-brazil

15.5k13040

@brain-brazil Thanks, that was helpful, now I'm also creating a HttpServer in my Main class as described here. This works for localhost:8080/metrics, but it also gives me the same web-page when I try to access localhost:8080/graph. How can I get the graphs something like this image?

– Lavish Kothari
Jan 2 at 12:16

1

You'll want to use Promethus for that, on localhost:9090

– brian-brazil
Jan 2 at 16:03

add a comment |

@brain-brazil Thanks, that was helpful, now I'm also creating a HttpServer in my Main class as described here. This works for localhost:8080/metrics, but it also gives me the same web-page when I try to access localhost:8080/graph. How can I get the graphs something like this image?

– Lavish Kothari
Jan 2 at 12:16

1

You'll want to use Promethus for that, on localhost:9090

– brian-brazil
Jan 2 at 16:03

@brain-brazil Thanks, that was helpful, now I'm also creating a HttpServer in my Main class as described here. This works for localhost:8080/metrics, but it also gives me the same web-page when I try to access localhost:8080/graph. How can I get the graphs something like this image?

– Lavish Kothari
Jan 2 at 12:16

You'll want to use Promethus for that, on localhost:9090

– brian-brazil
Jan 2 at 16:03

add a comment |

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