mirror of https://github.com/grpc/grpc-go.git
91 lines
3.2 KiB
Go
91 lines
3.2 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 client is a client 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/http"
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"time"
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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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"google.golang.org/grpc/credentials/insecure"
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"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", ":9465", "the Prometheus exporter endpoint for metrics")
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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-client"))))
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// Configure W3C Trace Context Propagator for traces
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textMapPropagator := otelpropagation.TraceContext{}
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do := opentelemetry.DialOption(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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})
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go http.ListenAndServe(*prometheusEndpoint, promhttp.Handler())
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cc, err := grpc.NewClient(*addr, grpc.WithTransportCredentials(insecure.NewCredentials()), do)
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if err != nil {
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log.Fatalf("grpc.NewClient() failed: %v", err)
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}
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defer cc.Close()
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c := echo.NewEchoClient(cc)
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ctx := context.Background()
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// Make an RPC every second. This should trigger telemetry to be emitted from
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// the client and the server.
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for {
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r, err := c.UnaryEcho(ctx, &echo.EchoRequest{Message: "this is examples/opentelemetry"})
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if err != nil {
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log.Fatalf("UnaryEcho failed: %v", err)
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}
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fmt.Println(r)
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time.Sleep(time.Second)
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}
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}
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