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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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80 lines
2.7 KiB
80 lines
2.7 KiB
8 months ago
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/*
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*
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* Copyright 2023 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#include <sys/types.h>
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#include <chrono>
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#include <condition_variable>
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#include <iostream>
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#include <memory>
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#include <string>
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#include "absl/flags/flag.h"
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#include "absl/flags/parse.h"
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#include "absl/types/optional.h"
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#include "examples/cpp/otel/util.h"
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#include "opentelemetry/exporters/prometheus/exporter_factory.h"
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#include "opentelemetry/exporters/prometheus/exporter_options.h"
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#include "opentelemetry/sdk/metrics/meter_provider.h"
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#include <grpcpp/ext/csm_observability.h>
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#include <grpcpp/grpcpp.h>
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#include <grpcpp/support/string_ref.h>
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ABSL_FLAG(std::string, target, "xds:///helloworld:50051", "Target string");
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ABSL_FLAG(std::string, prometheus_endpoint, "localhost:9464",
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"Prometheus exporter endpoint");
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namespace {
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absl::StatusOr<grpc::CsmObservability> InitializeObservability() {
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opentelemetry::exporter::metrics::PrometheusExporterOptions opts;
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// default was "localhost:9464" which causes connection issue across GKE pods
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opts.url = "0.0.0.0:9464";
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auto prometheus_exporter =
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opentelemetry::exporter::metrics::PrometheusExporterFactory::Create(opts);
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auto meter_provider =
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std::make_shared<opentelemetry::sdk::metrics::MeterProvider>();
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// The default histogram boundaries are not granular enough for RPCs. Override
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// the "grpc.client.attempt.duration" view as recommended by
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// https://github.com/grpc/proposal/blob/master/A66-otel-stats.md.
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AddLatencyView(meter_provider.get(), "grpc.client.attempt.duration", "s");
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meter_provider->AddMetricReader(std::move(prometheus_exporter));
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return grpc::CsmObservabilityBuilder()
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.SetMeterProvider(std::move(meter_provider))
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.BuildAndRegister();
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}
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} // namespace
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int main(int argc, char** argv) {
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absl::ParseCommandLine(argc, argv);
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// Setup CSM observability
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auto observability = InitializeObservability();
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if (!observability.ok()) {
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std::cerr << "CsmObservability::Init() failed: "
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<< observability.status().ToString() << std::endl;
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return static_cast<int>(observability.status().code());
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}
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// Continuously send RPCs every second.
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RunClient(absl::GetFlag(FLAGS_target));
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return 0;
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}
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