3032b5c48d
Changes - * Add CMake build support to `grpcpp_otel_plugin`. Currently, we are only supporting the `find_package CONFIG` method for depending on `opentelemetry-cpp`. * Since, `grpcpp_otel_plugin` is an extension of gRPC, it will not be built by default. To enable building of this target, a new CMake option `gRPC_BUILD_GRPCPP_OTEL_PLUGIN` is being added. * Also add `CMakeLists.txt` to the otel example. The `otel_plugin_test` can also be built through cmake but, for the CI to work, there are some additional changes. Those will be made in an upcoming PR. Closes #36063 COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36063 from yashykt:OTelCMakeSupport 3bc783823b17ed282ae9b6b7bf8a26cedaae30f9 PiperOrigin-RevId: 613734473
1.5 KiB
gRPC C++ OpenTelemetry Example
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
Running the example
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.
CMake Instructions
The following libraries need to be installed before building the example with CMake -
- absl
- protobuf
- prometheus-cpp
- opentelemetry-cpp (with the options
-DWITH_ABSEIL=ON-DWITH_PROMETHEUS=ON) - grpc (with the option
-DgRPC_BUILD_GRPCPP_OTEL_PLUGIN=ON)
You can find a complete set of instructions for building gRPC and running the Hello World app in the C++ Quick Start.