Deep Dive Into Observability With OpenTelemetry: A Hands-On Codelab
summary
Hands-on codelab builds a gRPC hello-world client and server and instruments them with OpenTelemetry plugin with Prometheus exporter, showing both automatic and manual instrumentation plus context propagation. Reproducible steps: clone repo, install prerequisites, build per language (C++, Go, Java, Python), register the OpenTelemetry plugin, run server then client; both emit metrics available on ports 9464 (server) and 9465 (client). Prometheus scrapes those endpoints and the dashboard shows live metrics once time ranges are adjusted.
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