Heartbeat functionality from AppInsights does not appear in azure portal

Question

I'm trying to get the heartbeat feature of AppInsights sdk to work but I'm having some trouble.

I have a simple app (just the default ASP.net core 2.2 project created by using dotnet new webapp) running on a k8 cluster inside Azure and is configured with the following settings:

public void ConfigureServices(IServiceCollection services)
        {
            ApplicationInsightsServiceOptions aiOptions
                                = new ApplicationInsightsServiceOptions();
            // Disables adaptive sampling.
            aiOptions.EnableAdaptiveSampling = false;

            // Disables QuickPulse (Live Metrics stream).
            aiOptions.EnableQuickPulseMetricStream = false;
            aiOptions.InstrumentationKey = InstrumentationKey;
            aiOptions.EnableHeartbeat=true;
            services.AddApplicationInsightsTelemetry(aiOptions);

            services.Configure<CookiePolicyOptions>(options =>
            {
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            services.AddApplicationInsightsKubernetesEnricher();

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
        }

However, I can't see any properties in Application Insights related to the heartbeat functionality. I can see other stuff like the kubernetes pod name, etc.

Am I missing some configuration?

Thank you.

Answer 1

The Heartbeat feature is enabled by default as of base SDK 2.5.0 and the ability to configure the Heartbeat was added in 2.3.0-beta1.

I would suggest you to modify your startup file like below:

public void ConfigureServices(IServiceCollection services)
  {
    services.AddMvc();

    ApplicationInsightsServiceOptions aiOpts = 
      new ApplicationInsightsServiceOptions();
    aiOpts.EnableHeartbeat = true; // false to disable
    services.AddApplicationInsightsTelemetry(aiOpts);
    ...
}

Also add using Microsoft.ApplicationInsights.AspNetCore.Extensions; in the top of your file. Configure the Heartbeat feature in code by modifying the IHeartbeatPropertyManager directly. You can do this when you first obtain the property manager via the TelemetryModules.Instance singleton.

 foreach (var md in TelemetryModules.Instance.Modules)
  {
    if (md is IHeartbeatPropertyManager heartbeatPropertyMan)
    {
      heartbeatPropertyMan.HeartbeatInterval = TimeSpan.FromMinutes(5.0);
      heartbeatPropertyMan.ExcludedHeartbeatProperties.Add("osType");
      ...

Try this and see if it helps.