Yash Tibrewal
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
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BUILD |
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CMakeLists.txt | [OTel C++] Add CMake build support (#36063) | 9 months ago |
README.md | [OTel C++] Add CMake build support (#36063) | 9 months ago |
greeter_callback_client.cc |
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greeter_callback_server.cc |
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README.md
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
- https://opentelemetry.io/
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.