Building an Observability Stack: Logs, Metrics, and Traces

Observability Is a System, Not a Dashboard

Teams often collect logs but still struggle during incidents. The missing piece is linking logs, metrics, and traces into one workflow.

The Three Signals Explained

• Logs: detailed events for root cause evidence.
• Metrics: trend and SLO visibility across time.
• Traces: per-request path to isolate slow components.

What Each Signal Is Best For

Baseline Stack for Mid-Sized Apps

1. Define SLIs/SLOs before tool setup.
2. Instrument HTTP + DB calls for tracing.
3. Include request_id and trace_id in logs.
4. Alert on user-impact thresholds, not raw noise.
5. Add runbook links to alert payloads.

Common Failure Pattern

Alert fires, on-call checks dashboard, then manually jumps across tools with no shared ID context. Fix this by enforcing correlation identifiers across all telemetry paths.