Azure Monitor is a comprehensive solution for collecting, analyzing, and acting on telemetry from your cloud and on-premises environments. It helps you maximize the availability and performance of your applications and services by delivering a complete set of monitoring tools.

• Metrics: Numerical data that describe the performance of your resources.
• Logs: Textual data that provide detailed information about the operation of your resources.

• Application Insights: Monitors the performance and usage of your applications.
• Log Analytics: Collects and analyzes log data from various sources.
• Azure Monitor Metrics: Collects metrics data from Azure resources.

• Log Queries: Use Kusto Query Language (KQL) to analyze log data.
• Metrics Explorer: Visualize and analyze metrics data.

• Alerts: Set up alerts to notify you of critical conditions.
• Autoscale: Automatically scale your resources based on metrics.

1. Navigate to Azure Portal: Go to the Azure Portal.
2. Select Resource: Choose the resource you want to monitor.
3. Enable Monitoring: Enable monitoring for the selected resource.

1. Application Insights:
   • Navigate to Application Insights.
   • Create a new Application Insights resource.
   • Instrument your application to send telemetry data.
2. Log Analytics:
   • Navigate to Log Analytics workspaces.
   • Create a new workspace.
   • Configure data sources to send logs to the workspace.

1. Navigate to Alerts: Go to the Alerts section in Azure Monitor.
2. Create Alert Rule: Click on "New alert rule".
3. Define Condition: Set the condition that triggers the alert.
4. Set Action Group: Define the actions to take when the alert is triggered.

Step 1: Enable Monitoring

Step 2: Configure Log Analytics

Step 3: Set Up an Alert

Task

1. Create an Application Insights resource.
2. Instrument an Azure Web App to send telemetry data to Application Insights.
3. Set up an alert to notify you when the response time exceeds 2 seconds.

Solution

1. Create Application Insights Resource:

   1. Navigate to "Application Insights" in the Azure Portal.
   2. Click on "Add" to create a new resource.
   3. Fill in the required details and click "Create".
   

2. Instrument Azure Web App:

   1. Navigate to your Azure Web App.
   2. In the "Settings" section, click on "Application Insights".
   3. Click on "Turn on Application Insights".
   4. Select the Application Insights resource you created.
   5. Click "Apply".
   

3. Set Up Alert:

   1. Go to "Azure Monitor" in the Azure Portal.
   2. Click on "Alerts" and then "New alert rule".
   3. Select the Azure Web App as the resource.
   4. Define the condition, e.g., Response time > 2 seconds.
   5. Set the action group, e.g., send an email notification.
   6. Click "Create alert rule".
   

• Mistake: Not configuring data sources correctly.
  • Tip: Ensure all necessary data sources are configured to send data to Log Analytics or Application Insights.
• Mistake: Setting too many alerts.
  • Tip: Focus on critical alerts to avoid alert fatigue.

Azure Monitor is a powerful tool for ensuring the performance and availability of your applications and services. By understanding how to collect, analyze, and act on telemetry data, you can proactively manage your Azure resources and respond to issues before they impact your users. In the next section, we will explore Azure Log Analytics in more detail.