Inspect distributed tracing by using Application Insights

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Table of Contents

1. Key Features
2. Enable Application Insights in Azure Portal
3. Add the Application Insights SDK
4. Configure the Instrumentation Key
5. Explore Telemetry in Application Insights
   • Overview Dashboard
   • Live Metrics Stream
   • Application Map
   • Performance
   • Failures
   • Availability
6. Configure Alerts
7. Diagnostic Settings & Log Analytics
8. References

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Key Features

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Enable Application Insights in Azure Portal

1. In the Azure Portal, create or select your Web App (e.g., KodeKloud Support).
2. Under Deployment > Networking, configure required networking options.
3. Navigate to Monitor and Secure, toggle Application Insights to Yes.
4. Choose an existing resource or create a new one for KodeKloud Support.
5. (Optional) Enable Defender for additional security monitoring.
6. Click Review + create to finalize.

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Add the Application Insights SDK

@page
@model IndexModel
@{
    ViewData["Title"] = "Home page";
}
<div class="hero-image" style="background-image: url('/img/frontpage.jpg'); background-size: cover; background-position: center;">
    <h1 class="display-4 text-white">Welcome to Kode Kloud</h1>
</div>
<div class="container mt-4">
    <div class="row">
        <div class="col-md-8 offset-md-2 text-center">
            <h2>Expert Tech Support at Your Service</h2>
            <p class="lead">
                At Kode Kloud, our dedicated tech support team is committed to providing you with exceptional service. With our extensive knowledge and passion for problem-solving, we're here to ensure your team runs smoothly, allowing you to focus on what matters most – your success.
            </p>
        </div>
    </div>
</div>

PM> Install-Package Microsoft.ApplicationInsights.AspNetCore

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Configure the Instrumentation Key

1. In the Azure Portal, go to Monitor > Application Insights > KodeKloud Support.
2. Under Instrument your application, select .NET and the Recommended Basic level.
3. Enable the Profiler and click Apply.

4. Copy the Instrumentation Key, then add it to appsettings.json:

{
  "ApplicationInsights": {
    "InstrumentationKey": "YOUR_INSTRUMENTATION_KEY"
  }
}

5. Update your application startup (Program.cs or Startup.cs):

using Microsoft.ApplicationInsights.Extensibility;

var builder = WebApplication.CreateBuilder(args);

// Add Application Insights telemetry
builder.Services.AddApplicationInsightsTelemetry();

var app = builder.Build();
app.Run();

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Explore Telemetry in Application Insights

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Overview Dashboard

• Failed requests
• Server response time
• Server requests
• Availability

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Live Metrics Stream

1. Go to Live Metrics and reset the view.
2. Generate traffic to monitor request rate, duration, CPU usage, and memory in real time.

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Application Map

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Performance

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Failures

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Availability

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Configure Alerts

1. In the portal, choose Alerts > New alert rule.
2. Select the target resource and signal type (e.g., Failed requests).
3. Set the condition logic and threshold.

4. On Actions, choose or create an action group to send email, SMS, or webhook notifications.

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Diagnostic Settings & Log Analytics

1. Under Diagnostic settings, configure streaming export of logs and metrics to storage, Event Hubs, or Log Analytics.

2. Use Log Analytics to run Kusto queries on your telemetry and logs for advanced diagnostics.

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References

• Azure Monitor Application Insights
• Kusto Query Language (KQL)
• Secure your secrets with Azure Key Vault