This technical guide provides a comprehensive coverage of Kubernetes observability, progressing from fundamental principles to advanced implementation patterns. It examines the three pillars - metrics, logs, and traces - alongside their collection and correlation methodologies. The book explores tool selection, OpenTelemetry standardization, and instrumentation techniques while diving into KPI implementation and eBPF profiling. Advanced topics cover multi-cloud observability, platform scaling, and AI-driven approaches, providing practical solutions for establishing robust observability in Kubernetes environments.