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System Observability: Logging, Metrics & Tracing (ELK + OpenTelemetry) · Lesson

The Pillars: Logs, Metrics, Traces

Explore the three distinct but complementary signals of observability: logs, metrics, and traces. Understand their individual strengths and how they work together.

Observability's Core Pillars

Observability rests on three pillars: logs, metrics, and traces. Each gives a different view, and together they paint a full picture of your system.

Logs: The Event Diary

Logs are your system's diary — text records of discrete events like a login or an error. They tell you exactly what happened and when.

All lessons in this course

  1. What is System Observability?
  2. The Pillars: Logs, Metrics, Traces
  3. Why Observability Matters Today
  4. Monitoring vs Observability: Knowns and Unknowns
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