How to configure ApplicationInsightsTelemetry, in .NET Core Web Api

Question

I am trying to adapt Application Insights to my liking. And I have some problems. I have it mounted like this. In the startup.cs class:

public void ConfigureServices(IServiceCollection services)
{
    services.AddApplicationInsightsTelemetry();
            
    services.AddControllers();
}

In the Program.cs:

public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureLogging(logging =>
                {
                    logging.AddApplicationInsights("73985d32-dc3b-4a7e-915e-aa7ef37fbef8");
                    logging.AddFilter<ApplicationInsightsLoggerProvider>("", LogLevel.Information);
                })
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });

So I avoid using the appsettings.json configuration, because the log level will be variable. My first question is, how can I make the dynamic log level, by querying the database? Another question, is how can I add a custom parameter, type customer_name?

Finally, how can I make Application Insights register the values that I want, using: Only record the values that come out of these functions, for example, if there is an exception, you would not have to register it.

_logger.LogInformation("Test info");
_logger.LogError(ex, ex.Message);

If you want to make dynamic logging to AI, you have to implement an `ITelemetryProcessor`. Then your logger has to *always* push the messages to AI and your processor makes the filtering (by omitting the call to `_next.Process(item);`). — Oliver, May 14 '21 at 09:38