Type in invocation Details in azure function app is missing but not Timestamp and Message

Question

I have migrated my Azure function app from the in-process to the isolated worker process.

so I have to add a program.cs with the following code:

var host = new HostBuilder()
    .ConfigureFunctionsWebApplication()
    .ConfigureServices(services =>
    {
        services.AddApplicationInsightsTelemetryWorkerService();
        services.ConfigureFunctionsApplicationInsights();
        services.Configure<KestrelServerOptions>(options =>
        {
            options.AllowSynchronousIO = true;
        });
    })
    .ConfigureLogging((hostingContext, logging) =>
    {
        logging.Services.Configure<LoggerFilterOptions>(options =>
        {
            LoggerFilterRule defaultRule = options.Rules.FirstOrDefault(rule => rule.ProviderName
                == "Microsoft.Extensions.Logging.ApplicationInsights.ApplicationInsightsLoggerProvider");
            if (defaultRule is not null)
            {
                options.Rules.Remove(defaultRule);
            }
        });
        //logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
    })
    .Build();

host.Run();

I can see the timestamp and the message in my invocation details but not the type why?

Why I am missing the logLevel?

Answer 1

Add this class to ur project

public class LogLevelTelemetryInitializer : ITelemetryInitializer

{

    private const string LogLevelKey = "LogLevel";

    public void Initialize(ITelemetry telemetry)

    {

        if (telemetry is not TraceTelemetry traceTelemetry)

        {

            return;

        }

        if (!traceTelemetry.Properties.ContainsKey(LogLevelKey))

        {

            var level = traceTelemetry.SeverityLevel switch

            {

                SeverityLevel.Verbose => "Verbose",

                SeverityLevel.Information => "Information",

                SeverityLevel.Warning => "Warning",

                SeverityLevel.Error => "Error",

                SeverityLevel.Critical => "Critical",

                _ => "Unknown",

            };

            traceTelemetry.Properties[LogLevelKey] = level;

        }

    }

}

and add this code to the program.cs

    logging.Services.AddSingleton<ITelemetryInitializer, LogLevelTelemetryInitializer>();

like here