AZ-900 Certification Notes

Chapter 11.3 - Monitoring Tools

Azure includes multiple monitoring tools to gain full visibility into your Azure environment:

Choose between pre-built and custom queries
Queries in Kusto Query Language (KQL) format
- KQL is the querying language used to query different types of logs in Log Analytics. SQL is similar (the syntax is a little bit different)

Performance insights for web applications
Answers questions:
- "How are users using out app?"
- "Where are our performance bottlenecks?"
- "Why are we getting website errors?"

Web apps only
Available for App Service, Azure VMs, and non-Azure resources
- VMs require installed agent
Application Insights scenario
- Find performance bottlenecks in web application
- Discover how users are using the website

When something breaks, alert someone to fix it! Notifications in response to unexpected events:

Examples:
- VM unresponsive
- VM using excessive CPU
- Application latency over 500 ms

Alert Rule
- Monitored resource
- Monitored telemetry
- Conditions to trigger alert
- Assigned severity
Rule Example
- Monitored resource: VM
- Monitored telemetry: CPU utilization
- Condition: > 90% CPU for 5 minutes
- Severity: 2 - Warning
Action group = action(s) taken when rule is triggered
- Notification targets
  - Email/SMS to support personnel
  - Send to automation workflows (Logic Apps, Azure Functions, and more) In all scenarios, when something is not working as expected, Azure Monitor alerts inform the right group to do something about it!