Example showing Tonic client and server interaction with OpenTelemetry context propagation. tracing_opentelemetry is used to hook into the tracing ecosystem, which enables drop-in replacements for log macros and an #[instrument] macro that will automatically add spans to your functions.
# Run jaeger in background
$ docker run -d -p6831:6831/udp -p6832:6832/udp -p16686:16686 jaegertracing/all-in-one:latest
# Run the server
$ cargo run --bin grpc-server
# Now run the client to make a request to the server
$ cargo run --bin grpc-client
# View spans (see the image below)
$ firefox http://localhost:16686/
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