عرض عملي: لوحة معلومات لخدمة من الصفر

خطوة بخطوة

1. Confirm Prometheus scrapes orders (targets page).
2. Add RED panels with the queries from L02.
3. Add JVM and DB pool panels (USE).
4. Planned mistake: a latency panel using the average; inject slow requests and see nothing. Replace with p95.
5. Create the error-rate alert with a runbook link and test it by injecting errors.
6. Export the dashboard as JSON into Git.