otel Investigations into open-telemetry builtin uses otel-collector packages as a library, to enable embedding it into other apps cli is a CLI app to send metrics to a collector collector is a simple docker-compose setup to run a collector Links https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/cmd/telemetrygen https://github.com/open-telemetry/opentelemetry-go/blob/main/metric/example_test.go