prometheus-net

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using Prometheus;
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using System;
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using System.Net;
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using System.Threading.Tasks;
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// This sample demonstrates how to integrate prometheus-net into a console app (e.g. a worker service).
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// 
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// NuGet packages required:
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// * prometheus-net
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internal static class Program
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{
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    public static void Main(string[] args)
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    {
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        // Start the metrics server on your preferred port number.
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        var server = new MetricServer(port: 1234);
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        try
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        {
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            // On .NET Framework, starting the server requires either elevation to Administrator or permission configuration.
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            server.Start();
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        }
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        catch (HttpListenerException ex)
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        {
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            Console.WriteLine($"Failed to start metric server: {ex.Message}");
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            Console.WriteLine("You may need to grant permissions to your user account if not running as Administrator:");
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            Console.WriteLine("netsh http add urlacl url=http://+:1234/metrics user=DOMAIN\\user");
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            return;
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        }
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        // Generate some sample data from fake business logic.
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        var recordsProcessed = Metrics.CreateCounter("sample_records_processed_total", "Total number of records processed.");
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        _ = Task.Run(async delegate
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        {
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            while (true)
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            {
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                // Pretend to process a record approximately every second, just for changing sample data.
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                recordsProcessed.Inc();
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                await Task.Delay(TimeSpan.FromSeconds(1));
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            }
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        });
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        // Metrics published in this sample:
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        // * built-in process metrics giving basic information about the .NET runtime (enabled by default)
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        // * the sample counter defined above
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        Console.WriteLine("Open http://localhost:1234/metrics in a web browser.");
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        Console.WriteLine("Press enter to exit.");
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        Console.ReadLine();
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        server.Stop();
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    }
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}