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Learn to implement comprehensive observability in Spring Boot 4 applications using the new dedicated OpenTelemetry starter in this 23-minute tutorial. Discover how to set up metrics, traces, and logs export without requiring the full Actuator dependency, and build a complete observability stack from scratch using Docker Compose. Explore the differences between the new OpenTelemetry starter and traditional Spring Boot Actuator approaches, then configure the LGTM stack (Loki, Grafana, Tempo, Mimir) for visualization. Master viewing traces and metrics in Grafana out of the box, adding custom metrics with @Observed annotations, and configuring log export via OTLP as introduced in Spring Boot 4.0.1. Connect logs directly to traces for powerful debugging workflows and establish production-ready observability practices that move beyond hope-based strategies to reliable monitoring solutions.
