AZ-204 Monitor and Troubleshoot Flashcards
What does Azure Monitor capture?
- Metrics
- Logs
- Distributed traces
- Changes
Which services have curated visualizations?
App Insights
Container Insights
VM Insig
How are log-based metrics enabled?
Either through auto-instrumentation or having developers use the SDK to emit events manually.
Can generate too much telemetry so filtering and sampling reduce log size but also accuracy.
Good for data analysis and ad-hoc diagnostics
What are standard metrics?
pre-aggregated metrics are not stored as individual events with lots of properties. Instead, they are stored as pre-aggregated time series, and only with key dimensions. This makes the new metrics superior at query time: retrieving data happens much faster and requires less compute power.
Good for dashboarding and realtime alerts.
What are availability tests?
After you’ve deployed your web app or website, you can set up recurring tests to monitor availability and responsiveness. Application Insights sends web requests to your application at regular intervals from points around the world. It can alert you if your application isn’t responding or responds too slowly.
You can set up availability tests for any HTTP or HTTPS endpoint that’s accessible from the public internet. You don’t have to make any changes to the website you’re testing. In fact, it doesn’t even have to be a site that you own. You can test the availability of a REST API that your service depends on.
What are the 3 types of availability tests?
URL ping test (classic): You can create this simple test through the portal to validate whether an endpoint is responding and measure performance associated with that response. You can also set custom success criteria coupled with more advanced features, like parsing dependent requests and allowing for retries.
Standard test (Preview): This single request test is similar to the URL ping test. It includes SSL certificate validity, proactive lifetime check, HTTP request verb (for example GET, HEAD, or POST), custom headers, and custom data associated with your HTTP request.
Custom TrackAvailability test: If you decide to create a custom application to run availability tests, you can use the TrackAvailability() method to send the results to Application Insights.
How can you troubleshoot with an Application Map?
App Map finds components using HTTP dependency calls made between servers with App Insights SDK and each of these components has health KPIs and alerts status.
How do you create an alert rule?
Go to azure monitor -> alerts -> create->alert rule
What is an action group when creating a new alert rule?
Group of actions to trigger upon a specific alert
What is a dynamic threshold in Azure Monitor?
Azure uses machine learning on historical values to create a threshold
