68 lines
2.6 KiB
C++
68 lines
2.6 KiB
C++
/*
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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 <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/log/log.h"
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#include "absl/strings/str_cat.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/admin_services.h>
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#include <grpcpp/ext/csm_observability.h>
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#include <grpcpp/ext/proto_server_reflection_plugin.h>
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#include <grpcpp/grpcpp.h>
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#include <grpcpp/health_check_service_interface.h>
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#include <grpcpp/xds_server_builder.h>
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ABSL_FLAG(int32_t, port, 50051, "Server port for service.");
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ABSL_FLAG(std::string, prometheus_endpoint, "localhost:9464",
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"Prometheus exporter endpoint");
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int main(int argc, char** argv) {
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absl::ParseCommandLine(argc, argv);
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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.server.call.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.server.call.duration", "s");
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meter_provider->AddMetricReader(std::move(prometheus_exporter));
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auto observability = grpc::CsmObservabilityBuilder()
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.SetMeterProvider(std::move(meter_provider))
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.BuildAndRegister();
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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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RunServer(absl::GetFlag(FLAGS_port));
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return 0;
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}
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