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105 lines
2.7 KiB
105 lines
2.7 KiB
package main
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import (
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"context"
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"os"
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v1 "github.com/go-kratos/kratos/examples/traces/api/message"
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"github.com/go-kratos/kratos/v2"
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"github.com/go-kratos/kratos/v2/log"
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"github.com/go-kratos/kratos/v2/middleware"
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"github.com/go-kratos/kratos/middleware/logging/v2"
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"github.com/go-kratos/kratos/middleware/recovery/v2"
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"github.com/go-kratos/kratos/middleware/tracing/v2"
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"github.com/go-kratos/kratos/v2/transport/grpc"
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/exporters/jaeger"
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"go.opentelemetry.io/otel/sdk/resource"
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tracesdk "go.opentelemetry.io/otel/sdk/trace"
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semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
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)
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// go build -ldflags "-X main.Version=x.y.z"
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var (
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// Name is the name of the compiled software.
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Name = "message"
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// Version is the version of the compiled software.
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Version = "v1.0.0"
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)
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// server is used to implement helloworld.GreeterServer.
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type server struct {
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v1.UnimplementedMessageServiceServer
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}
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// set trace provider
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func setTracerProvider(url string) error {
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// Create the Jaeger exporter
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exp, err := jaeger.New(jaeger.WithCollectorEndpoint(jaeger.WithEndpoint(url)))
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if err != nil {
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return err
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}
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tp := tracesdk.NewTracerProvider(
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// Set the sampling rate based on the parent span to 100%
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tracesdk.WithSampler(tracesdk.ParentBased(tracesdk.TraceIDRatioBased(1.0))),
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// Always be sure to batch in production.
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tracesdk.WithBatcher(exp),
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// Record information about this application in an Resource.
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tracesdk.WithResource(resource.NewSchemaless(
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semconv.ServiceNameKey.String(Name),
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attribute.String("env", "dev"),
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)),
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)
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otel.SetTracerProvider(tp)
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return nil
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}
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func (s *server) GetUserMessage(ctx context.Context, request *v1.GetUserMessageRequest) (*v1.GetUserMessageReply, error) {
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msgs := &v1.GetUserMessageReply{}
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for i := 0; i < int(request.Count); i++ {
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msgs.Messages = append(msgs.Messages, &v1.Message{Content: "Teletubbies say hello."})
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}
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return msgs, nil
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}
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func main() {
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logger := log.NewStdLogger(os.Stdout)
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logger = log.With(logger, "trace_id", tracing.TraceID())
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logger = log.With(logger, "span_id", tracing.SpanID())
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log := log.NewHelper(logger)
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url := "http://jaeger:14268/api/traces"
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if os.Getenv("jaeger_url") != "" {
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url = os.Getenv("jaeger_url")
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}
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err := setTracerProvider(url)
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if err != nil {
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log.Error(err)
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}
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s := &server{}
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// grpc server
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grpcSrv := grpc.NewServer(
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grpc.Address(":9000"),
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grpc.Middleware(
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middleware.Chain(
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recovery.Recovery(),
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// Configuring tracing Middleware
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tracing.Server(),
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logging.Server(logger),
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),
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))
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v1.RegisterMessageServiceServer(grpcSrv, s)
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app := kratos.New(
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kratos.Name(Name),
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kratos.Server(
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grpcSrv,
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),
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)
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if err := app.Run(); err != nil {
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log.Error(err)
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}
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}
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