Program.cs

using System.Globalization;
using Microsoft.AspNetCore.Mvc;
using OpenTelemetry.Logs;
using OpenTelemetry.Metrics;
using OpenTelemetry.Resources;
using OpenTelemetry.Trace;

var builder = WebApplication.CreateBuilder(args);

const string serviceName = "roll-dice";
const string otlpHttpEndpoint = "http://my-opentelemetry-collector.telemetry.svc.cluster.local:4318"; 
const string otlpGrpcEndpoint = "http://my-opentelemetry-collector.telemetry.svc.cluster.local:4317"; 


builder.Logging.AddOpenTelemetry(options =>
{
    options
        .SetResourceBuilder(
            ResourceBuilder.CreateDefault()
                .AddService(serviceName))
        .AddOtlpExporter(otlpOptions =>
        {
            otlpOptions.Endpoint = new Uri(otlpHttpEndpoint);
        }); 
});


builder.Services.AddOpenTelemetry()
    .ConfigureResource(resource => resource.AddService(serviceName))
    .WithTracing(tracing => tracing
        .AddAspNetCoreInstrumentation() 
        .AddHttpClientInstrumentation()
        .AddOtlpExporter(otlpOptions =>
        {
            otlpOptions.Endpoint = new Uri(otlpGrpcEndpoint);
        }) 
        .AddOtlpExporter(otlpOptions =>
        {
            otlpOptions.Endpoint = new Uri(otlpHttpEndpoint);
        }))
    .WithMetrics(metrics => metrics
        .AddAspNetCoreInstrumentation()
        .AddHttpClientInstrumentation()
        .AddOtlpExporter(otlpOptions =>
        {
            otlpOptions.Endpoint = new Uri(otlpGrpcEndpoint);
        }) 
        .AddOtlpExporter(otlpOptions =>
        {
            otlpOptions.Endpoint = new Uri(otlpHttpEndpoint);
        }));

var app = builder.Build();

app.MapGet("/rolldice/{player?}", HandleRollDice);

app.Run();

string HandleRollDice([FromServices] ILogger<Program> logger, string? player)
{
    var result = RollDice();

    if (string.IsNullOrEmpty(player))
    {
        logger.LogInformation("Anonymous player is rolling the dice: {result}", result);
    }
    else
    {
        logger.LogInformation("{player} is rolling the dice: {result}", player, result);
    }

    return result.ToString(CultureInfo.InvariantCulture);
}

int RollDice()
{
    return Random.Shared.Next(1, 7);
}