The opentelemetry example builds on the Hello World Example and changes the gRPC client and server to show a sample way of configuring the gRPC OpenTelemetry plugin with a prometheus exporter.
For more information on the gRPC OpenTelemetry plugin, please refer to - * A66: OpenTelemetry Metrics
To run the server -
$ tools/bazel run examples/cpp/otel:greeter_callback_server
To run the client -
$ tools/bazel run examples/cpp/otel:greeter_callback_client
The client continuously sends an RPC to the server every second.
To make sure that the server and client metrics are being exported properly, in a separate terminal, run the following -
$ curl localhost:9464/metrics
$ curl localhost:9465/metrics
NOTE: If the prometheus endpoint configured is overridden, please update the target in the above curl command.
You can find a complete set of instructions for building gRPC and running the Hello World app in the C++ Quick Start.