mirror of https://github.com/grpc/grpc-go.git
89 lines
2.9 KiB
Go
89 lines
2.9 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 CSM Observability 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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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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xdscreds "google.golang.org/grpc/credentials/xds"
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pb "google.golang.org/grpc/examples/helloworld/helloworld"
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"google.golang.org/grpc/stats/opentelemetry"
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"google.golang.org/grpc/stats/opentelemetry/csm"
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_ "google.golang.org/grpc/xds" // To install the xds resolvers and balancers.
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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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"go.opentelemetry.io/otel/sdk/metric"
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)
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const defaultName = "world"
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var (
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target = flag.String("target", "xds:///helloworld:50051", "the server address to connect to")
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prometheusEndpoint = flag.String("prometheus_endpoint", ":9464", "the Prometheus exporter endpoint")
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name = flag.String("name", defaultName, "Name to greet")
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)
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func main() {
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flag.Parse()
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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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provider := metric.NewMeterProvider(metric.WithReader(exporter))
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go http.ListenAndServe(*prometheusEndpoint, promhttp.Handler())
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cleanup := csm.EnableObservability(context.Background(), opentelemetry.Options{MetricsOptions: opentelemetry.MetricsOptions{MeterProvider: provider}})
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defer cleanup()
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// Set up xds credentials that fall back to insecure as described in:
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// https://cloud.google.com/service-mesh/docs/service-routing/security-proxyless-setup#workloads_are_unable_to_communicate_in_the_security_setup.
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creds, err := xdscreds.NewClientCredentials(xdscreds.ClientOptions{FallbackCreds: insecure.NewCredentials()})
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if err != nil {
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log.Fatalf("Failed to create xDS credentials: %v", err)
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}
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cc, err := grpc.NewClient(*target, grpc.WithTransportCredentials(creds))
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if err != nil {
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log.Fatalf("Failed to start NewClient: %v", err)
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}
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defer cc.Close()
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c := pb.NewGreeterClient(cc)
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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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ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
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r, err := c.SayHello(ctx, &pb.HelloRequest{Name: *name})
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if err != nil {
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log.Fatalf("Could not greet: %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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cancel()
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}
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}
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