mirror of https://github.com/grpc/grpc-go.git
92 lines
3.1 KiB
Go
92 lines
3.1 KiB
Go
/*
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*
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* Copyright 2024 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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// Binary server is a server for the OpenTelemetry example.
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package main
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import (
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"context"
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"flag"
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"fmt"
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"log"
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"net"
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"net/http"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"go.opentelemetry.io/otel/exporters/prometheus"
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otelstdouttrace "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
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otelpropagation "go.opentelemetry.io/otel/propagation"
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otelmetric "go.opentelemetry.io/otel/sdk/metric"
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otelresource "go.opentelemetry.io/otel/sdk/resource"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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semconv "go.opentelemetry.io/otel/semconv/v1.24.0"
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"google.golang.org/grpc"
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pb "google.golang.org/grpc/examples/features/proto/echo"
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oteltracing "google.golang.org/grpc/experimental/opentelemetry"
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"google.golang.org/grpc/stats/opentelemetry"
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)
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var (
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addr = flag.String("addr", ":50051", "the server address to connect to")
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prometheusEndpoint = flag.String("prometheus_endpoint", ":9464", "the Prometheus exporter endpoint for metrics")
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)
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type echoServer struct {
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pb.UnimplementedEchoServer
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addr string
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}
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func (s *echoServer) UnaryEcho(_ context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
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return &pb.EchoResponse{Message: fmt.Sprintf("%s (from %s)", req.Message, s.addr)}, nil
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}
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func main() {
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exporter, err := prometheus.New()
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if err != nil {
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log.Fatalf("Failed to start prometheus exporter: %v", err)
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}
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// Configure meter provider for metrics
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meterProvider := otelmetric.NewMeterProvider(otelmetric.WithReader(exporter))
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// Configure exporter for traces
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traceExporter, err := otelstdouttrace.New(otelstdouttrace.WithPrettyPrint())
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if err != nil {
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log.Fatalf("Failed to create stdouttrace exporter: %v", err)
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}
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traceProvider := sdktrace.NewTracerProvider(sdktrace.WithBatcher(traceExporter), sdktrace.WithResource(otelresource.NewWithAttributes(semconv.SchemaURL, semconv.ServiceName("grpc-server"))))
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// Configure W3C Trace Context Propagator for traces
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textMapPropagator := otelpropagation.TraceContext{}
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so := opentelemetry.ServerOption(opentelemetry.Options{
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MetricsOptions: opentelemetry.MetricsOptions{MeterProvider: meterProvider},
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TraceOptions: oteltracing.TraceOptions{TracerProvider: traceProvider, TextMapPropagator: textMapPropagator}})
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go http.ListenAndServe(*prometheusEndpoint, promhttp.Handler())
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lis, err := net.Listen("tcp", *addr)
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if err != nil {
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log.Fatalf("Failed to listen: %v", err)
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}
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s := grpc.NewServer(so)
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pb.RegisterEchoServer(s, &echoServer{addr: *addr})
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log.Printf("Serving on %s\n", *addr)
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if err := s.Serve(lis); err != nil {
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log.Fatalf("Failed to serve: %v", err)
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}
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}
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