115 lines
4.9 KiB
C#
115 lines
4.9 KiB
C#
// <copyright file="TestPrometheus.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;
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using System.Threading.Tasks;
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using OpenTelemetry.Exporter.Prometheus;
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using OpenTelemetry.Metrics;
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using OpenTelemetry.Metrics.Configuration;
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using OpenTelemetry.Metrics.Export;
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using OpenTelemetry.Trace;
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namespace Samples
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{
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internal class TestPrometheus
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{
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internal static async Task<object> RunAsync(int port, int pushIntervalInSecs, int totalDurationInMins)
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{
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Console.WriteLine($"OpenTelemetry Prometheus Exporter is making metrics available at http://localhost:{port}/metrics/");
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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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// Create and Setup Prometheus Exporter
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var promOptions = new PrometheusExporterOptions() { Url = $"http://localhost:{port}/metrics/" };
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var promExporter = new PrometheusExporter(promOptions);
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var metricsHttpServer = new PrometheusExporterMetricsHttpServer(promExporter);
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metricsHttpServer.Start();
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// Creater Processor (called Batcher in Metric spec, this is still not decided)
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var processor = new UngroupedBatcher();
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// MeterFactory is from where one can obtain Meters.
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// All meters from this factory will be configured with the common processor.
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var meterFactory = MeterFactory.Create(mb =>
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{
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mb.SetMetricProcessor(processor);
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mb.SetMetricExporter(promExporter);
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mb.SetMetricPushInterval(TimeSpan.FromSeconds(pushIntervalInSecs));
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});
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// Obtain a Meter. Libraries would pass their name as argument.
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var meter = meterFactory.GetMeter("MyMeter");
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// the rest is purely from Metric API.
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var testCounter = meter.CreateInt64Counter("MyCounter");
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var testMeasure = meter.CreateInt64Measure("MyMeasure");
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var testObserver = meter.CreateInt64Observer("MyObservation", CallBackForMyObservation);
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var labels1 = new List<KeyValuePair<string, string>>();
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labels1.Add(new KeyValuePair<string, string>("dim1", "value1"));
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var labels2 = new List<KeyValuePair<string, string>>();
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labels2.Add(new KeyValuePair<string, string>("dim1", "value2"));
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var defaultContext = default(SpanContext);
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Stopwatch sw = Stopwatch.StartNew();
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while (sw.Elapsed.TotalMinutes < totalDurationInMins)
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{
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testCounter.Add(defaultContext, 100, meter.GetLabelSet(labels1));
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testMeasure.Record(defaultContext, 100, meter.GetLabelSet(labels1));
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testMeasure.Record(defaultContext, 500, meter.GetLabelSet(labels1));
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testMeasure.Record(defaultContext, 5, meter.GetLabelSet(labels1));
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testMeasure.Record(defaultContext, 750, meter.GetLabelSet(labels1));
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// Obviously there is no testObserver.Oberve() here, as Observer instruments
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// have callbacks that are called by the Meter automatically at each collection interval.
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await Task.Delay(1000);
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var remaining = (totalDurationInMins * 60) - sw.Elapsed.TotalSeconds;
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Console.WriteLine("Running and emitting metrics. Remaining time:" + (int)remaining + " seconds");
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}
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// Stopping
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metricsHttpServer.Stop();
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Console.WriteLine("Metrics server shutdown.");
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Console.WriteLine("Press Enter key to exit.");
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return null;
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}
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internal static void CallBackForMyObservation(Int64ObserverMetric observerMetric)
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{
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var labels1 = new List<KeyValuePair<string, string>>();
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labels1.Add(new KeyValuePair<string, string>("dim1", "value1"));
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observerMetric.Observe(Process.GetCurrentProcess().WorkingSet64, labels1);
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}
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}
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}
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