Library › Book 6 › Distributed Tracing with OpenTelemetry
Distributed Tracing with OpenTelemetry
7.1🔒Why Distributed Tracing?In a microservices architecture, a single user request may traverse 5, 10, or 20 services. When that request is slow or fails, you need to…
7.2🔒OpenTelemetry ArchitectureOpenTelemetry (OTel) is the CNCF standard for collecting telemetry data -- vendor-neutral APIs, SDKs, and a collector for traces, metrics…
7.3🔒How Traces, Spans, and Context Work TogetherThe trace reveals the payment service is the bottleneck (1200ms out of ~1300ms total). The metric confirms this is a trend. The log…
7.4🔒OpenTelemetry Instrumentation LabPRO TIP: Add manual spans for every business-critical operation, not just HTTP calls. Auto-instrumentation captures framework-level…
7.5🔒Trace-Based TestingA powerful pattern is writing assertions against traces -- verifying not just that a request succeeded, but that it followed the expected…
7.6🔒OpenTelemetry Collector Configuration
7.7🔒Sampling StrategiesRecommendation: Use tail-based sampling with always-on for errors and slow traces.
7.8🔒Career Translation- Instrumented 15+ microservices with OpenTelemetry (auto-instrumentation for HTTP/DB/messaging, manual spans for business logic), enabling…
7.9🔒Q&AInterview Depth CheckPrompt: You write a trace-based test for the order flow. The test asserts that the payment-service span exists in the trace. One day, the…