Welcome to the OpenTelemetry Foundations!

Modern microservices are complex. When something breaks, logs alone aren’t enough. You need to see the whole path of a request across your entire system.

In this module, we cover the core concepts:

• The Three Pillars: Traces, Metrics, and Logs.
• The OTel Toolkit: API vs SDK vs Agent.
• Context Propagation: How trace IDs travel across service boundaries.

Module Chapters

Chapter 1

Fundamentals

Understanding Traces, Metrics, and Logs.

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Chapter 2

Zero to Tracing

Setting up the Java Agent and running your first trace.

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