Agent: Integration with `IServiceProvider` [Research]

[Steve Gordon]

The existing OpenTelemetry SDK includes support for integrating with IServiceProvider. For example, the resource builder can read from a resolved IConfiguration instance. We should ensure that our distribution behaves nicely with this usage pattern and that we don't prevent any scenarios that depend on the IServiceProvider mechanisms.

Example:

var builder = WebApplication.CreateBuilder(args);

const string serviceName = "roll-dice";

builder.Logging.AddOpenTelemetry(options =>
{
    options
        .SetResourceBuilder(
            ResourceBuilder.CreateDefault()
                .AddService(serviceName))
        .AddConsoleExporter();
});
builder.Services.AddOpenTelemetry()
      .ConfigureResource(resource => resource.AddService(serviceName))
      .WithTracing(tracing => tracing
          .AddAspNetCoreInstrumentation()
          .AddConsoleExporter())
      .WithMetrics(metrics => metrics
          .AddAspNetCoreInstrumentation()
          .AddConsoleExporter());

var app = builder.Build();