[grpc][Gpr_To_Absl_Logging] Migrating from gpr to absl logging - gpr_log
In this CL we are migrating from gRPCs own gpr logging mechanism to absl logging mechanism. The intention is to deprecate gpr_log in the future.
We have the following mapping
1. gpr_log(GPR_INFO,...) -> LOG(INFO)
2. gpr_log(GPR_ERROR,...) -> LOG(ERROR)
3. gpr_log(GPR_DEBUG,...) -> VLOG(2)
Reviewers need to check :
1. If the above mapping is correct.
2. The content of the log is as before.
gpr_log format strings did not use string_view or std::string . absl LOG accepts these. So there will be some elimination of string_view and std::string related conversions. This is expected.
Closes#36636
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36636 from tanvi-jagtap:regex_test_cpp f2cac9c5a49f8d6025989160b9d9d6954dc8cc2d
PiperOrigin-RevId: 634954173
Just to be future-proof, I'm amending the `void` return status of `BuildAndRegisterGlobal` in `OpenTelemetryPluginBuilder` to absl::Status.
This will be backported to 1.61 as well.
Closes#35659
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/35659 from yashykt:UpdateOtelApiToAddStatus 07d3f41b8af09349db8bf572d2feb0405445ac93
PiperOrigin-RevId: 601458408
Provide a public experimental API and bazel compatible build target for OpenTelemetry metrics.
Details -
* New `OpenTelemetryPluginBuilder` class that provides the API specified in https://github.com/grpc/proposal/blob/master/A66-otel-stats.md
* The existing `grpc::internal::OpenTelemetryPluginBuilder` class is moved to `grpc::internal::OpenTelemetryPluginBuilderImpl` for disambiguation.
* Renamed `OTel` in some instances to `OpenTelemetry` for consistency.
Closes#35348
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/35348 from yashykt:OTelPublicApi e32328825ee23042f125eb25cb9456cc7767f14e
PiperOrigin-RevId: 594271246
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Working towards testing against CSM Observability. Added ability to
register a prometheus exporter with our Opentelemetry plugin. This will
allow our metrics to be available at the standard prometheus port
`:9464`.
Third try for #32466.
This adds an interop client / server for GCP Observability integration
testing.
Everything is new here with no refactor. Plan is to get this in first
before trying to refactor out the flags.
Tanvi Jagtap