108 lines
4.2 KiB
C#
108 lines
4.2 KiB
C#
// <copyright file="TestPrometheusExporter.cs" company="OpenTelemetry Authors">
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// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// </copyright>
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.Metrics;
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using System.Threading;
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using System.Threading.Tasks;
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using OpenTelemetry;
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using OpenTelemetry.Metrics;
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using OpenTelemetry.Trace;
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namespace Examples.Console
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{
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internal class TestPrometheusExporter
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{
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private static readonly Meter MyMeter = new Meter("TestMeter", "0.0.1");
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private static readonly Counter<long> Counter = MyMeter.CreateCounter<long>("myCounter");
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private static readonly Histogram<long> MyHistogram = MyMeter.CreateHistogram<long>("myHistogram");
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private static readonly Random RandomGenerator = new Random();
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internal static object Run(int port, int totalDurationInMins)
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{
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/*
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Following is sample prometheus.yml config. Adjust port,interval as needed.
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scrape_configs:
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# The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
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- job_name: 'OpenTelemetryTest'
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# metrics_path defaults to '/metrics'
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# scheme defaults to 'http'.
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static_configs:
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- targets: ['localhost:9184']
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*/
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using var meterProvider = Sdk.CreateMeterProviderBuilder()
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.AddSource("TestMeter")
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.AddPrometheusExporter(opt =>
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{
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opt.StartHttpListener = true;
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opt.HttpListenerPrefixes = new string[] { $"http://*:{port}/" };
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})
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.Build();
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ObservableGauge<long> gauge = MyMeter.CreateObservableGauge<long>(
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"Gauge",
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() =>
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{
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var tag1 = new KeyValuePair<string, object>("tag1", "value1");
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var tag2 = new KeyValuePair<string, object>("tag2", "value2");
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return new List<Measurement<long>>()
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{
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new Measurement<long>(RandomGenerator.Next(1, 1000), tag1, tag2),
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};
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});
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using var token = new CancellationTokenSource();
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Task writeMetricTask = new Task(() =>
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{
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while (!token.IsCancellationRequested)
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{
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Counter.Add(
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10,
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new KeyValuePair<string, object>("tag1", "value1"),
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new KeyValuePair<string, object>("tag2", "value2"));
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Counter.Add(
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100,
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new KeyValuePair<string, object>("tag1", "anothervalue"),
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new KeyValuePair<string, object>("tag2", "somethingelse"));
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MyHistogram.Record(
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RandomGenerator.Next(1, 1500),
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new KeyValuePair<string, object>("tag1", "value1"),
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new KeyValuePair<string, object>("tag2", "value2"));
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Task.Delay(10).Wait();
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}
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});
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writeMetricTask.Start();
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token.CancelAfter(totalDurationInMins * 60 * 1000);
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System.Console.WriteLine($"OpenTelemetry Prometheus Exporter is making metrics available at http://localhost:{port}/metrics/");
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System.Console.WriteLine($"Press Enter key to exit now or will exit automatically after {totalDurationInMins} minutes.");
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System.Console.ReadLine();
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token.Cancel();
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System.Console.WriteLine("Exiting...");
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return null;
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}
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}
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}
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