public static async Task Main(string[] args)
{
using var meterProvider = Sdk.CreateMeterProviderBuilder()
.AddSource("TestMeter")
.AddConsoleExporter()
.Build();
ObservableGauge <long> gauge = MyMeter.CreateObservableGauge <long>(
"Gauge",
() =>
{
var tag1 = new KeyValuePair <string, object>("tag1", "value1");
var tag2 = new KeyValuePair <string, object>("tag2", "value2");
return(new List <Measurement <long> >()
{
new Measurement <long>(RandomGenerator.Next(1, 1000), tag1, tag2),
});
});
await Task.Delay(10000);
}
internal static object Run(int port, int totalDurationInMins)
{
/*
* Following is sample prometheus.yml config. Adjust port,interval as needed.
*
* scrape_configs:
# The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
# - job_name: 'OpenTelemetryTest'
#
# metrics_path defaults to '/metrics'
# scheme defaults to 'http'.
#
# static_configs:
# - targets: ['localhost:9184']
*/
using var meterProvider = Sdk.CreateMeterProviderBuilder()
.AddSource("TestMeter")
.AddPrometheusExporter(opt => opt.Url = $"http://localhost:{port}/metrics/")
.Build();
ObservableGauge <long> gauge = MyMeter.CreateObservableGauge <long>(
"Gauge",
() =>
{
var tag1 = new KeyValuePair <string, object>("tag1", "value1");
var tag2 = new KeyValuePair <string, object>("tag2", "value2");
return(new List <Measurement <long> >()
{
new Measurement <long>(RandomGenerator.Next(1, 1000), tag1, tag2),
});
});
using var token = new CancellationTokenSource();
Task writeMetricTask = new Task(() =>
{
while (!token.IsCancellationRequested)
{
Counter.Add(
10,
new KeyValuePair <string, object>("tag1", "value1"),
new KeyValuePair <string, object>("tag2", "value2"));
Counter.Add(
100,
new KeyValuePair <string, object>("tag1", "anothervalue"),
new KeyValuePair <string, object>("tag2", "somethingelse"));
MyHistogram.Record(
RandomGenerator.Next(1, 1500),
new KeyValuePair <string, object>("tag1", "value1"),
new KeyValuePair <string, object>("tag2", "value2"));
Task.Delay(10).Wait();
}
});
writeMetricTask.Start();
token.CancelAfter(totalDurationInMins * 60 * 1000);
System.Console.WriteLine($"OpenTelemetry Prometheus Exporter is making metrics available at http://localhost:{port}/metrics/");
System.Console.WriteLine($"Press Enter key to exit now or will exit automatically after {totalDurationInMins} minutes.");
System.Console.ReadLine();
token.Cancel();
System.Console.WriteLine("Exiting...");
return(null);
}
