Auto-Instrumenting NestJS Apps with OpenTelemetry

The tutorial provides a detailed walkthrough of using OpenTelemetry to auto-instrument a simple NestJS application that outputs "Hello World!" in a browser. It guides users through installing necessary OpenTelemetry packages, adding a tracer to the NestJS application, and setting up an OpenTelemetry Collector to handle trace data. The trace data is exported to an external distributed tracing analytics tool, with the tutorial using Logz.io as an example. Users are instructed on configuring a YAML file for the OpenTelemetry Collector to define data collection and export settings. Once set up, the application is run, and traces can be visualized using the Jaeger UI. The tutorial emphasizes the ease of auto-instrumentation with OpenTelemetry, requiring minimal changes to the application code while offering the flexibility to use different tracing backends.

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