Logging & Observability
Patterns for building observable systems across the three pillars: logs, metrics, and traces.
Three Pillars
| Pillar | Purpose | Question It Answers | Example | |--------|---------|---------------------|---------| | Logs | What happened | Why did this request fail? | {"level":"error","msg":"payment declined","user_id":"u_82"} | | Metrics | How much / how fast | Is latency increasing? | http_request_duration_seconds{route="/api/orders"} 0.342 | | **Trac
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