Application Insights

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Read ApplicationInsights.conf

Cs.svg
// Reads ApplicationInsights.config file in the working directory
TelemetryConfiguration config = TelemetryConfiguration.Active;

// Reads a specific ApplicationInsights.config file
TelemetryConfiguration configuration = TelemetryConfiguration.CreateFromConfiguration(File.ReadAllText("C:\\ApplicationInsights.config"));

var telemetryClient = new TelemetryClient(configuration);

Send telemetry to Application Insights

Capturing exceptions and related diagnostic data

App_Start\WebApiConfig.cs
public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        /* ... */
        config.Services.Add(typeof(IExceptionLogger), new AiExceptionLogger());
AiExceptionLogger.cs
public class AiExceptionLogger : ExceptionLogger
{
    public TelemetryClient AppInsights { get; set; }

    public AiExceptionLogger()
    {
        AppInsights = new TelemetryClient();
    }

    public override void Log(ExceptionLoggerContext context)
    {
        if (context != null && context.Exception != null)
        {
            AppInsights.TrackException(context.Exception);
        }
        base.Log(context);

Visualiser les données dans visual studio

Cloud Explorer → My Subcription → Application Insights → clique-droit sur My Application Insight → Search

Installation

  • Automatique: Azure web app → Monitoring → Application Insights → No data? Automatically instrument your ASP.NET app (restart required)
  • Manuel: Azure web app → Extensions → Add → Application Insights

Ajouter les paquets NuGet

  • Tous: Clique-droit sur le projet → Add → Application Insights Telemetry
  • Exception tracking: Microsoft.ApplicationInsights.Web
ApplicationInsights.config
<?xml version="1.0" encoding="utf-8"?>
<ApplicationInsights xmlns="http://schemas.microsoft.com/ApplicationInsights/2013/Settings">
  <TelemetryInitializers>
    <!-- ... -->
  </TelemetryInitializers>
  <TelemetryModules>
    <!-- ... -->
  </TelemetryModules>
  <TelemetryProcessors>
    <!-- ... -->
  </TelemetryProcessors>
  <TelemetryChannel Type="Microsoft.ApplicationInsights.WindowsServer.TelemetryChannel.ServerTelemetryChannel, Microsoft.AI.ServerTelemetryChannel"/>
</ApplicationInsights>
Modules Description Package Nuget
Dependency Tracking appels au bdd et services externes Microsoft.ApplicationInsights.DependencyCollector
Performance collector CPU, mémoire, charge réseau Microsoft.ApplicationInsights.PerfCounterCollector
Application Insights Diagnostics Telemetry erreur dans l'App Insight elle-même Microsoft.ApplicationInsights
Developer Mode force l'envoie des données immédiatement lorsque le debugger est attaché Microsoft.ApplicationInsights.WindowsServer
Web Request Tracking code et temps de réponse des requêtes HTTP Microsoft.ApplicationInsights.Web
Exception tracking exceptions non-gérées Microsoft.ApplicationInsights.Web
EventSource Tracking envoyer les EventSource comme des traces Microsoft.ApplicationInsights.EventSourceListener
ETW Event Tracking envoyer les événements des ETW providers comme des traces Microsoft.ApplicationInsights.EtwCollector
Microsoft.ApplicationInsights Core API pour le SDK Microsoft.ApplicationInsights

Erreurs

AI: Performance counter is not available in the web app supported list

These warnings are expected as computer level counters are not accessible from the Azure Web App environment. There's no way to turn off any particular counter from the default counters collection, so please safely ignore them as it doesn't affect anything.

AI: Server telemetry channel was not initialized

AI: Server telemetry channel was not initialized. So persistent storage is turned off. You need to call ServerTelemetryChannel.Initialize(). Currently monitoring will continue but if telemetry cannot be sent it will be dropped.

Le fichier ApplicationInsights.config est manquant.