Thiết kế hệ thống giám sát production, logging, metrics và quan sát (Observability).
Expert patterns for production observability: logs, metrics, traces, và SLO/SLI/SLA.
1. LOGS (Events)
→ What happened? When? Context?
→ Use: Debugging, audit trails
2. METRICS (Numbers)
→ How much? How fast? How many?
→ Use: Dashboards, alerts, trends
3. TRACES (Requests)
→ Where did request go? How long?
→ Use: Distributed systems, latency
# Prometheus config