OpenTelemetry (OTel)

Unified telemetry for cloud-native applications. Traces, metrics, and logs under one vendor-neutral standard.

Sections

• Overview — History, goals, unified model
• Signals — Traces, Metrics, Logs data models
• Traces 101 — TracerProvider, Tracer, Span, SpanContext, patterns
• Metrics 101 — MeterProvider, Meter, Counter, Histogram, Gauge
• Logs 101 — LoggerProvider, Logger, LogRecord, bridge patterns, trace correlation
• SDK & Language Support — API/SDK split, auto-instrumentation, per-language agents
• Collector — Receivers, processors, exporters pipeline
• Context Propagation — W3C Trace Context, Baggage, propagators
• OTLP Protocol — gRPC/HTTP transport, delivery semantics
• Semantic Conventions — Resource and span attribute standards
• Kubernetes Deployment — Agent vs Gateway mode, DaemonSet, resource limits
• OTel Glossary — API vs SDK vs Protocol vs Exporter vs Collector
• Exercise: End-to-End — Go + Python instrumented services to SigNoz

Quick Reference

References

• OTel Docs
• OTel Spec
• OTel GitHub
• OTel Registry