add examples/traces (#932)

examples/traces/Dockerfile

@@ -0,0 +1,30 @@
+FROM golang:1.15 AS builder
+
+COPY . /src
+
+COPY ../ /src
+
+WORKDIR /src/app/message
+
+RUN GOPROXY=https://goproxy.cn go build -o ./bin/message ./...
+
+WORKDIR /src/app/user
+
+RUN GOPROXY=https://goproxy.cn go build -o ./bin/user ./...
+
+FROM debian:stable-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+		ca-certificates  \
+        netbase \
+        && rm -rf /var/lib/apt/lists/ \
+        && apt-get autoremove -y && apt-get autoclean -y
+
+COPY --from=builder /src/app/message/bin /app
+COPY --from=builder /src/app/user/bin /app
+COPY --from=builder /src/start.sh /app
+
+EXPOSE 8000
+EXPOSE 9000
+
+ENTRYPOINT ["sh","/app/start.sh"]

examples/traces/README.md

@@ -0,0 +1,19 @@
+# traces example
+
+- There are two services in the example
+
+- After receiving the HTTP request, the user service calls the grpc server provided by the message service through the grpc client
+
+- The example shows how to use tracing middleware
+
+- You can experience the effect by following the command
+
+### run example
+```shell
+docker-compose up -build
+curl http://localhost:8000/v1/user/get/message/10
+# Open with browser http://localhost:16686
+# You can see the effect
+```
+
+

examples/traces/api/message/message.pb.go

@@ -0,0 +1,299 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.13.0
+// source: message.proto
+
+package v1
+
+import (
+	_ "google.golang.org/genproto/googleapis/api/annotations"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type GetUserMessageRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Id    int64 `protobuf:"varint,1,opt,name=id,proto3" json:"id,omitempty"`
+	Count int64 `protobuf:"varint,2,opt,name=count,proto3" json:"count,omitempty"`
+}
+
+func (x *GetUserMessageRequest) Reset() {
+	*x = GetUserMessageRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_message_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetUserMessageRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetUserMessageRequest) ProtoMessage() {}
+
+func (x *GetUserMessageRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_message_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetUserMessageRequest.ProtoReflect.Descriptor instead.
+func (*GetUserMessageRequest) Descriptor() ([]byte, []int) {
+	return file_message_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *GetUserMessageRequest) GetId() int64 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+func (x *GetUserMessageRequest) GetCount() int64 {
+	if x != nil {
+		return x.Count
+	}
+	return 0
+}
+
+type GetUserMessageReply struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Messages []*Message `protobuf:"bytes,1,rep,name=messages,proto3" json:"messages,omitempty"`
+}
+
+func (x *GetUserMessageReply) Reset() {
+	*x = GetUserMessageReply{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_message_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetUserMessageReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetUserMessageReply) ProtoMessage() {}
+
+func (x *GetUserMessageReply) ProtoReflect() protoreflect.Message {
+	mi := &file_message_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetUserMessageReply.ProtoReflect.Descriptor instead.
+func (*GetUserMessageReply) Descriptor() ([]byte, []int) {
+	return file_message_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *GetUserMessageReply) GetMessages() []*Message {
+	if x != nil {
+		return x.Messages
+	}
+	return nil
+}
+
+type Message struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Content string `protobuf:"bytes,1,opt,name=content,proto3" json:"content,omitempty"`
+}
+
+func (x *Message) Reset() {
+	*x = Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_message_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Message) ProtoMessage() {}
+
+func (x *Message) ProtoReflect() protoreflect.Message {
+	mi := &file_message_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Message.ProtoReflect.Descriptor instead.
+func (*Message) Descriptor() ([]byte, []int) {
+	return file_message_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *Message) GetContent() string {
+	if x != nil {
+		return x.Content
+	}
+	return ""
+}
+
+var File_message_proto protoreflect.FileDescriptor
+
+var file_message_proto_rawDesc = []byte{
+	0x0a, 0x0d, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12,
+	0x0e, 0x61, 0x70, 0x69, 0x2e, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x2e, 0x76, 0x31, 0x1a,
+	0x1c, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x61, 0x6e, 0x6e, 0x6f,
+	0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x3d, 0x0a,
+	0x15, 0x47, 0x65, 0x74, 0x55, 0x73, 0x65, 0x72, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x52,
+	0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01,
+	0x28, 0x03, 0x52, 0x02, 0x69, 0x64, 0x12, 0x14, 0x0a, 0x05, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x18,
+	0x02, 0x20, 0x01, 0x28, 0x03, 0x52, 0x05, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x22, 0x4a, 0x0a, 0x13,
+	0x47, 0x65, 0x74, 0x55, 0x73, 0x65, 0x72, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x52, 0x65,
+	0x70, 0x6c, 0x79, 0x12, 0x33, 0x0a, 0x08, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x18,
+	0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x17, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x6d, 0x65, 0x73, 0x73,
+	0x61, 0x67, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x52, 0x08,
+	0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x22, 0x23, 0x0a, 0x07, 0x4d, 0x65, 0x73, 0x73,
+	0x61, 0x67, 0x65, 0x12, 0x18, 0x0a, 0x07, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x18, 0x01,
+	0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x32, 0x99, 0x01,
+	0x0a, 0x0e, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65,
+	0x12, 0x86, 0x01, 0x0a, 0x0e, 0x47, 0x65, 0x74, 0x55, 0x73, 0x65, 0x72, 0x4d, 0x65, 0x73, 0x73,
+	0x61, 0x67, 0x65, 0x12, 0x25, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67,
+	0x65, 0x2e, 0x76, 0x31, 0x2e, 0x47, 0x65, 0x74, 0x55, 0x73, 0x65, 0x72, 0x4d, 0x65, 0x73, 0x73,
+	0x61, 0x67, 0x65, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x23, 0x2e, 0x61, 0x70, 0x69,
+	0x2e, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x47, 0x65, 0x74, 0x55,
+	0x73, 0x65, 0x72, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x52, 0x65, 0x70, 0x6c, 0x79, 0x22,
+	0x28, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x22, 0x12, 0x1d, 0x2f, 0x76, 0x31, 0x2f, 0x6d, 0x65, 0x73,
+	0x73, 0x61, 0x67, 0x65, 0x2f, 0x75, 0x73, 0x65, 0x72, 0x2f, 0x7b, 0x69, 0x64, 0x7d, 0x2f, 0x7b,
+	0x63, 0x6f, 0x75, 0x6e, 0x74, 0x7d, 0x3a, 0x01, 0x2a, 0x42, 0x51, 0x0a, 0x0e, 0x61, 0x70, 0x69,
+	0x2e, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x2e, 0x76, 0x31, 0x50, 0x01, 0x5a, 0x3d, 0x67,
+	0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x2d, 0x6b, 0x72, 0x61,
+	0x74, 0x6f, 0x73, 0x2f, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x65, 0x78, 0x61, 0x6d, 0x70,
+	0x6c, 0x65, 0x73, 0x2f, 0x74, 0x72, 0x61, 0x63, 0x65, 0x73, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x6d,
+	0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x2f, 0x76, 0x31, 0x3b, 0x76, 0x31, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_message_proto_rawDescOnce sync.Once
+	file_message_proto_rawDescData = file_message_proto_rawDesc
+)
+
+func file_message_proto_rawDescGZIP() []byte {
+	file_message_proto_rawDescOnce.Do(func() {
+		file_message_proto_rawDescData = protoimpl.X.CompressGZIP(file_message_proto_rawDescData)
+	})
+	return file_message_proto_rawDescData
+}
+
+var file_message_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_message_proto_goTypes = []interface{}{
+	(*GetUserMessageRequest)(nil), // 0: api.message.v1.GetUserMessageRequest
+	(*GetUserMessageReply)(nil),   // 1: api.message.v1.GetUserMessageReply
+	(*Message)(nil),               // 2: api.message.v1.Message
+}
+var file_message_proto_depIdxs = []int32{
+	2, // 0: api.message.v1.GetUserMessageReply.messages:type_name -> api.message.v1.Message
+	0, // 1: api.message.v1.MessageService.GetUserMessage:input_type -> api.message.v1.GetUserMessageRequest
+	1, // 2: api.message.v1.MessageService.GetUserMessage:output_type -> api.message.v1.GetUserMessageReply
+	2, // [2:3] is the sub-list for method output_type
+	1, // [1:2] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_message_proto_init() }
+func file_message_proto_init() {
+	if File_message_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_message_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetUserMessageRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_message_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetUserMessageReply); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_message_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_message_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_message_proto_goTypes,
+		DependencyIndexes: file_message_proto_depIdxs,
+		MessageInfos:      file_message_proto_msgTypes,
+	}.Build()
+	File_message_proto = out.File
+	file_message_proto_rawDesc = nil
+	file_message_proto_goTypes = nil
+	file_message_proto_depIdxs = nil
+}

examples/traces/api/message/message.proto

@@ -0,0 +1,32 @@
+syntax = "proto3";
+
+package api.message.v1;
+
+option go_package = "github.com/go-kratos/kratos/examples/traces/api/message/v1;v1";
+option java_multiple_files = true;
+option java_package = "api.message.v1";
+
+import "google/api/annotations.proto";
+
+service MessageService {
+    rpc GetUserMessage (GetUserMessageRequest) returns (GetUserMessageReply){
+     option (google.api.http) = {
+          get: "/v1/message/user/{id}/{count}"
+          body: "*"
+        };
+    }
+}
+
+
+message GetUserMessageRequest {
+    int64 id = 1;
+    int64 count = 2;
+}
+
+message GetUserMessageReply {
+  repeated Message messages = 1;
+}
+
+message Message {
+  string content = 1;
+}

examples/traces/api/message/message_grpc.pb.go

@@ -0,0 +1,101 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package v1
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+// MessageServiceClient is the client API for MessageService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type MessageServiceClient interface {
+	GetUserMessage(ctx context.Context, in *GetUserMessageRequest, opts ...grpc.CallOption) (*GetUserMessageReply, error)
+}
+
+type messageServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewMessageServiceClient(cc grpc.ClientConnInterface) MessageServiceClient {
+	return &messageServiceClient{cc}
+}
+
+func (c *messageServiceClient) GetUserMessage(ctx context.Context, in *GetUserMessageRequest, opts ...grpc.CallOption) (*GetUserMessageReply, error) {
+	out := new(GetUserMessageReply)
+	err := c.cc.Invoke(ctx, "/api.message.v1.MessageService/GetUserMessage", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// MessageServiceServer is the server API for MessageService service.
+// All implementations must embed UnimplementedMessageServiceServer
+// for forward compatibility
+type MessageServiceServer interface {
+	GetUserMessage(context.Context, *GetUserMessageRequest) (*GetUserMessageReply, error)
+	mustEmbedUnimplementedMessageServiceServer()
+}
+
+// UnimplementedMessageServiceServer must be embedded to have forward compatible implementations.
+type UnimplementedMessageServiceServer struct {
+}
+
+func (UnimplementedMessageServiceServer) GetUserMessage(context.Context, *GetUserMessageRequest) (*GetUserMessageReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetUserMessage not implemented")
+}
+func (UnimplementedMessageServiceServer) mustEmbedUnimplementedMessageServiceServer() {}
+
+// UnsafeMessageServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to MessageServiceServer will
+// result in compilation errors.
+type UnsafeMessageServiceServer interface {
+	mustEmbedUnimplementedMessageServiceServer()
+}
+
+func RegisterMessageServiceServer(s grpc.ServiceRegistrar, srv MessageServiceServer) {
+	s.RegisterService(&MessageService_ServiceDesc, srv)
+}
+
+func _MessageService_GetUserMessage_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetUserMessageRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(MessageServiceServer).GetUserMessage(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/api.message.v1.MessageService/GetUserMessage",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MessageServiceServer).GetUserMessage(ctx, req.(*GetUserMessageRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// MessageService_ServiceDesc is the grpc.ServiceDesc for MessageService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var MessageService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "api.message.v1.MessageService",
+	HandlerType: (*MessageServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetUserMessage",
+			Handler:    _MessageService_GetUserMessage_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "message.proto",
+}

examples/traces/api/message/message_http.pb.go

@@ -0,0 +1,63 @@
+// Code generated by protoc-gen-go-http. DO NOT EDIT.
+
+package v1
+
+import (
+	context "context"
+	http1 "github.com/go-kratos/kratos/v2/transport/http"
+	binding "github.com/go-kratos/kratos/v2/transport/http/binding"
+	mux "github.com/gorilla/mux"
+	http "net/http"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the kratos package it is being compiled against.
+var _ = new(http.Request)
+var _ = new(context.Context)
+var _ = binding.MapProto
+var _ = mux.NewRouter
+
+const _ = http1.SupportPackageIsVersion1
+
+type MessageServiceHandler interface {
+	GetUserMessage(context.Context, *GetUserMessageRequest) (*GetUserMessageReply, error)
+}
+
+func NewMessageServiceHandler(srv MessageServiceHandler, opts ...http1.HandleOption) http.Handler {
+	h := http1.DefaultHandleOptions()
+	for _, o := range opts {
+		o(&h)
+	}
+	r := mux.NewRouter()
+
+	r.HandleFunc("/v1/message/user/{id}/{count}", func(w http.ResponseWriter, r *http.Request) {
+		var in GetUserMessageRequest
+		if err := h.Decode(r, &in); err != nil {
+			h.Error(w, r, err)
+			return
+		}
+
+		if err := binding.MapProto(&in, mux.Vars(r)); err != nil {
+			h.Error(w, r, err)
+			return
+		}
+
+		next := func(ctx context.Context, req interface{}) (interface{}, error) {
+			return srv.GetUserMessage(ctx, req.(*GetUserMessageRequest))
+		}
+		if h.Middleware != nil {
+			next = h.Middleware(next)
+		}
+		out, err := next(r.Context(), &in)
+		if err != nil {
+			h.Error(w, r, err)
+			return
+		}
+		reply := out.(*GetUserMessageReply)
+		if err := h.Encode(w, r, reply); err != nil {
+			h.Error(w, r, err)
+		}
+	}).Methods("GET")
+
+	return r
+}

examples/traces/api/user/user.pb.go

@@ -0,0 +1,288 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.13.0
+// source: user.proto
+
+package v1
+
+import (
+	_ "google.golang.org/genproto/googleapis/api/annotations"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type GetMyMessagesRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Count int64 `protobuf:"varint,1,opt,name=count,proto3" json:"count,omitempty"`
+}
+
+func (x *GetMyMessagesRequest) Reset() {
+	*x = GetMyMessagesRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_user_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetMyMessagesRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetMyMessagesRequest) ProtoMessage() {}
+
+func (x *GetMyMessagesRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_user_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetMyMessagesRequest.ProtoReflect.Descriptor instead.
+func (*GetMyMessagesRequest) Descriptor() ([]byte, []int) {
+	return file_user_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *GetMyMessagesRequest) GetCount() int64 {
+	if x != nil {
+		return x.Count
+	}
+	return 0
+}
+
+type GetMyMessagesReply struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Messages []*Message `protobuf:"bytes,1,rep,name=messages,proto3" json:"messages,omitempty"`
+}
+
+func (x *GetMyMessagesReply) Reset() {
+	*x = GetMyMessagesReply{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_user_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetMyMessagesReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetMyMessagesReply) ProtoMessage() {}
+
+func (x *GetMyMessagesReply) ProtoReflect() protoreflect.Message {
+	mi := &file_user_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetMyMessagesReply.ProtoReflect.Descriptor instead.
+func (*GetMyMessagesReply) Descriptor() ([]byte, []int) {
+	return file_user_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *GetMyMessagesReply) GetMessages() []*Message {
+	if x != nil {
+		return x.Messages
+	}
+	return nil
+}
+
+type Message struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Content string `protobuf:"bytes,1,opt,name=content,proto3" json:"content,omitempty"`
+}
+
+func (x *Message) Reset() {
+	*x = Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_user_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Message) ProtoMessage() {}
+
+func (x *Message) ProtoReflect() protoreflect.Message {
+	mi := &file_user_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Message.ProtoReflect.Descriptor instead.
+func (*Message) Descriptor() ([]byte, []int) {
+	return file_user_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *Message) GetContent() string {
+	if x != nil {
+		return x.Content
+	}
+	return ""
+}
+
+var File_user_proto protoreflect.FileDescriptor
+
+var file_user_proto_rawDesc = []byte{
+	0x0a, 0x0a, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0b, 0x61, 0x70,
+	0x69, 0x2e, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x76, 0x31, 0x1a, 0x1c, 0x67, 0x6f, 0x6f, 0x67, 0x6c,
+	0x65, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x61, 0x6e, 0x6e, 0x6f, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e,
+	0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x2c, 0x0a, 0x14, 0x47, 0x65, 0x74, 0x4d, 0x79,
+	0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12,
+	0x14, 0x0a, 0x05, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x03, 0x52, 0x05,
+	0x63, 0x6f, 0x75, 0x6e, 0x74, 0x22, 0x46, 0x0a, 0x12, 0x47, 0x65, 0x74, 0x4d, 0x79, 0x4d, 0x65,
+	0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x52, 0x65, 0x70, 0x6c, 0x79, 0x12, 0x30, 0x0a, 0x08, 0x6d,
+	0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x14, 0x2e,
+	0x61, 0x70, 0x69, 0x2e, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x76, 0x31, 0x2e, 0x4d, 0x65, 0x73, 0x73,
+	0x61, 0x67, 0x65, 0x52, 0x08, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x22, 0x23, 0x0a,
+	0x07, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x12, 0x18, 0x0a, 0x07, 0x63, 0x6f, 0x6e, 0x74,
+	0x65, 0x6e, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x63, 0x6f, 0x6e, 0x74, 0x65,
+	0x6e, 0x74, 0x32, 0x84, 0x01, 0x0a, 0x04, 0x55, 0x73, 0x65, 0x72, 0x12, 0x7c, 0x0a, 0x0d, 0x47,
+	0x65, 0x74, 0x4d, 0x79, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x12, 0x21, 0x2e, 0x61,
+	0x70, 0x69, 0x2e, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x76, 0x31, 0x2e, 0x47, 0x65, 0x74, 0x4d, 0x79,
+	0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a,
+	0x1f, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x76, 0x31, 0x2e, 0x47, 0x65,
+	0x74, 0x4d, 0x79, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x52, 0x65, 0x70, 0x6c, 0x79,
+	0x22, 0x27, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x21, 0x12, 0x1c, 0x2f, 0x76, 0x31, 0x2f, 0x75, 0x73,
+	0x65, 0x72, 0x2f, 0x67, 0x65, 0x74, 0x2f, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x2f, 0x7b,
+	0x63, 0x6f, 0x75, 0x6e, 0x74, 0x7d, 0x3a, 0x01, 0x2a, 0x42, 0x55, 0x0a, 0x0b, 0x61, 0x70, 0x69,
+	0x2e, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x76, 0x31, 0x50, 0x01, 0x5a, 0x44, 0x67, 0x69, 0x74, 0x68,
+	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x2d, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73,
+	0x2f, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x73,
+	0x2f, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2d, 0x68, 0x74, 0x74, 0x70, 0x2d, 0x67, 0x72, 0x70,
+	0x63, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x75, 0x73, 0x65, 0x72, 0x2f, 0x76, 0x31, 0x3b, 0x76, 0x31,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_user_proto_rawDescOnce sync.Once
+	file_user_proto_rawDescData = file_user_proto_rawDesc
+)
+
+func file_user_proto_rawDescGZIP() []byte {
+	file_user_proto_rawDescOnce.Do(func() {
+		file_user_proto_rawDescData = protoimpl.X.CompressGZIP(file_user_proto_rawDescData)
+	})
+	return file_user_proto_rawDescData
+}
+
+var file_user_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_user_proto_goTypes = []interface{}{
+	(*GetMyMessagesRequest)(nil), // 0: api.user.v1.GetMyMessagesRequest
+	(*GetMyMessagesReply)(nil),   // 1: api.user.v1.GetMyMessagesReply
+	(*Message)(nil),              // 2: api.user.v1.Message
+}
+var file_user_proto_depIdxs = []int32{
+	2, // 0: api.user.v1.GetMyMessagesReply.messages:type_name -> api.user.v1.Message
+	0, // 1: api.user.v1.User.GetMyMessages:input_type -> api.user.v1.GetMyMessagesRequest
+	1, // 2: api.user.v1.User.GetMyMessages:output_type -> api.user.v1.GetMyMessagesReply
+	2, // [2:3] is the sub-list for method output_type
+	1, // [1:2] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_user_proto_init() }
+func file_user_proto_init() {
+	if File_user_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_user_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetMyMessagesRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_user_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetMyMessagesReply); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_user_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_user_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_user_proto_goTypes,
+		DependencyIndexes: file_user_proto_depIdxs,
+		MessageInfos:      file_user_proto_msgTypes,
+	}.Build()
+	File_user_proto = out.File
+	file_user_proto_rawDesc = nil
+	file_user_proto_goTypes = nil
+	file_user_proto_depIdxs = nil
+}

examples/traces/api/user/user.proto

@@ -0,0 +1,30 @@
+syntax = "proto3";
+
+package api.user.v1;
+
+option go_package = "github.com/go-kratos/kratos/examples/kratos-http-grpc/api/user/v1;v1";
+option java_multiple_files = true;
+option java_package = "api.user.v1";
+
+import "google/api/annotations.proto";
+
+service User {
+  rpc GetMyMessages (GetMyMessagesRequest) returns (GetMyMessagesReply){
+    option (google.api.http) = {
+      get: "/v1/user/get/message/{count}"
+      body: "*"
+    };
+  }
+}
+
+
+message GetMyMessagesRequest {
+  int64 count = 1;
+}
+message GetMyMessagesReply {
+  repeated Message messages = 1;
+}
+
+message Message {
+  string content = 1;
+}

examples/traces/api/user/user_grpc.pb.go

@@ -0,0 +1,101 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package v1
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+// UserClient is the client API for User service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type UserClient interface {
+	GetMyMessages(ctx context.Context, in *GetMyMessagesRequest, opts ...grpc.CallOption) (*GetMyMessagesReply, error)
+}
+
+type userClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewUserClient(cc grpc.ClientConnInterface) UserClient {
+	return &userClient{cc}
+}
+
+func (c *userClient) GetMyMessages(ctx context.Context, in *GetMyMessagesRequest, opts ...grpc.CallOption) (*GetMyMessagesReply, error) {
+	out := new(GetMyMessagesReply)
+	err := c.cc.Invoke(ctx, "/api.user.v1.User/GetMyMessages", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// UserServer is the server API for User service.
+// All implementations must embed UnimplementedUserServer
+// for forward compatibility
+type UserServer interface {
+	GetMyMessages(context.Context, *GetMyMessagesRequest) (*GetMyMessagesReply, error)
+	mustEmbedUnimplementedUserServer()
+}
+
+// UnimplementedUserServer must be embedded to have forward compatible implementations.
+type UnimplementedUserServer struct {
+}
+
+func (UnimplementedUserServer) GetMyMessages(context.Context, *GetMyMessagesRequest) (*GetMyMessagesReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetMyMessages not implemented")
+}
+func (UnimplementedUserServer) mustEmbedUnimplementedUserServer() {}
+
+// UnsafeUserServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to UserServer will
+// result in compilation errors.
+type UnsafeUserServer interface {
+	mustEmbedUnimplementedUserServer()
+}
+
+func RegisterUserServer(s grpc.ServiceRegistrar, srv UserServer) {
+	s.RegisterService(&User_ServiceDesc, srv)
+}
+
+func _User_GetMyMessages_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetMyMessagesRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(UserServer).GetMyMessages(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/api.user.v1.User/GetMyMessages",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(UserServer).GetMyMessages(ctx, req.(*GetMyMessagesRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// User_ServiceDesc is the grpc.ServiceDesc for User service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var User_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "api.user.v1.User",
+	HandlerType: (*UserServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetMyMessages",
+			Handler:    _User_GetMyMessages_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "user.proto",
+}

examples/traces/api/user/user_http.pb.go

@@ -0,0 +1,63 @@
+// Code generated by protoc-gen-go-http. DO NOT EDIT.
+
+package v1
+
+import (
+	context "context"
+	http1 "github.com/go-kratos/kratos/v2/transport/http"
+	binding "github.com/go-kratos/kratos/v2/transport/http/binding"
+	mux "github.com/gorilla/mux"
+	http "net/http"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the kratos package it is being compiled against.
+var _ = new(http.Request)
+var _ = new(context.Context)
+var _ = binding.MapProto
+var _ = mux.NewRouter
+
+const _ = http1.SupportPackageIsVersion1
+
+type UserHandler interface {
+	GetMyMessages(context.Context, *GetMyMessagesRequest) (*GetMyMessagesReply, error)
+}
+
+func NewUserHandler(srv UserHandler, opts ...http1.HandleOption) http.Handler {
+	h := http1.DefaultHandleOptions()
+	for _, o := range opts {
+		o(&h)
+	}
+	r := mux.NewRouter()
+
+	r.HandleFunc("/v1/user/get/message/{count}", func(w http.ResponseWriter, r *http.Request) {
+		var in GetMyMessagesRequest
+		if err := h.Decode(r, &in); err != nil {
+			h.Error(w, r, err)
+			return
+		}
+
+		if err := binding.MapProto(&in, mux.Vars(r)); err != nil {
+			h.Error(w, r, err)
+			return
+		}
+
+		next := func(ctx context.Context, req interface{}) (interface{}, error) {
+			return srv.GetMyMessages(ctx, req.(*GetMyMessagesRequest))
+		}
+		if h.Middleware != nil {
+			next = h.Middleware(next)
+		}
+		out, err := next(r.Context(), &in)
+		if err != nil {
+			h.Error(w, r, err)
+			return
+		}
+		reply := out.(*GetMyMessagesReply)
+		if err := h.Encode(w, r, reply); err != nil {
+			h.Error(w, r, err)
+		}
+	}).Methods("GET")
+
+	return r
+}

examples/traces/app/message/main.go

@@ -0,0 +1,105 @@
+package main
+
+import (
+	"context"
+	pb "github.com/go-kratos/kratos/examples/traces/api/message"
+	"github.com/go-kratos/kratos/v2"
+	"github.com/go-kratos/kratos/v2/log"
+	"github.com/go-kratos/kratos/v2/middleware"
+	"github.com/go-kratos/kratos/v2/middleware/logging"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
+	"github.com/go-kratos/kratos/v2/middleware/tracing"
+	"github.com/go-kratos/kratos/v2/transport/grpc"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/exporters/trace/jaeger"
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/sdk/resource"
+	tracesdk "go.opentelemetry.io/otel/sdk/trace"
+	"go.opentelemetry.io/otel/semconv"
+	"go.opentelemetry.io/otel/trace"
+	"os"
+)
+
+// go build -ldflags "-X main.Version=x.y.z"
+var (
+	// Name is the name of the compiled software.
+	Name = "message"
+	// Version is the version of the compiled software.
+	Version = "v1.0.0"
+)
+
+// server is used to implement helloworld.GreeterServer.
+type server struct {
+	pb.UnimplementedMessageServiceServer
+	tracer trace.TracerProvider
+}
+
+// Get trace provider
+func tracerProvider(url string) (*tracesdk.TracerProvider, error) {
+	// Create the Jaeger exporter
+	exp, err := jaeger.NewRawExporter(jaeger.WithCollectorEndpoint(jaeger.WithEndpoint(url)))
+	if err != nil {
+		return nil, err
+	}
+	tp := tracesdk.NewTracerProvider(
+		tracesdk.WithSampler(tracesdk.AlwaysSample()),
+		// Always be sure to batch in production.
+		tracesdk.WithBatcher(exp),
+		// Record information about this application in an Resource.
+		tracesdk.WithResource(resource.NewWithAttributes(
+			semconv.ServiceNameKey.String(pb.MessageService_ServiceDesc.ServiceName),
+			attribute.String("environment", "development"),
+			attribute.Int64("ID", 1),
+		)),
+	)
+	return tp, nil
+}
+
+func (s *server) GetUserMessage(ctx context.Context, request *pb.GetUserMessageRequest) (*pb.GetUserMessageReply, error) {
+	msgs := &pb.GetUserMessageReply{}
+	for i := 0; i < int(request.Count); i++ {
+		msgs.Messages = append(msgs.Messages,&pb.Message{Content: "Teletubbies say hello."})
+	}
+	return msgs, nil
+}
+
+func main() {
+	logger := log.NewStdLogger(os.Stdout)
+
+	log := log.NewHelper("user", logger)
+
+	tp, err := tracerProvider("http://jaeger:14268/api/traces")
+	if err != nil {
+		log.Error(err)
+	}
+
+	s := &server{tracer: tp}
+	// grpc server
+	grpcSrv := grpc.NewServer(
+		grpc.Address(":9000"),
+		grpc.Middleware(
+			middleware.Chain(
+				recovery.Recovery(),
+				// Configuring tracing Middleware
+				tracing.Server(
+					tracing.WithTracerProvider(tp),
+					tracing.WithPropagators(
+						propagation.NewCompositeTextMapPropagator(propagation.Baggage{}, propagation.TraceContext{}),
+					),
+				),
+				logging.Server(logger),
+			),
+		))
+	pb.RegisterMessageServiceServer(grpcSrv, s)
+
+	app := kratos.New(
+		kratos.Name(Name),
+		kratos.Server(
+			grpcSrv,
+		),
+	)
+
+	if err := app.Run(); err != nil {
+		log.Error(err)
+	}
+}

examples/traces/app/user/main.go

@@ -0,0 +1,130 @@
+package main
+
+import (
+	"context"
+	message "github.com/go-kratos/kratos/examples/traces/api/message"
+	pb "github.com/go-kratos/kratos/examples/traces/api/user"
+	"github.com/go-kratos/kratos/v2"
+	"github.com/go-kratos/kratos/v2/log"
+	"github.com/go-kratos/kratos/v2/middleware"
+	"github.com/go-kratos/kratos/v2/middleware/logging"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
+	"github.com/go-kratos/kratos/v2/middleware/tracing"
+	"github.com/go-kratos/kratos/v2/transport/grpc"
+	"github.com/go-kratos/kratos/v2/transport/http"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/exporters/trace/jaeger"
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/sdk/resource"
+	tracesdk "go.opentelemetry.io/otel/sdk/trace"
+	"go.opentelemetry.io/otel/semconv"
+	"go.opentelemetry.io/otel/trace"
+	"os"
+	"time"
+)
+
+// go build -ldflags "-X main.Version=x.y.z"
+var (
+	// Name is the name of the compiled software.
+	Name = "user"
+	// Version is the version of the compiled software.
+	Version = "v1.0.0"
+)
+
+// server is used to implement helloworld.GreeterServer.
+type server struct {
+	pb.UnimplementedUserServer
+	tracer trace.TracerProvider
+}
+
+// Get trace provider
+func tracerProvider(url string) (*tracesdk.TracerProvider, error) {
+	// Create the Jaeger exporter
+	exp, err := jaeger.NewRawExporter(jaeger.WithCollectorEndpoint(jaeger.WithEndpoint(url)))
+	if err != nil {
+		return nil, err
+	}
+	tp := tracesdk.NewTracerProvider(
+		tracesdk.WithSampler(tracesdk.AlwaysSample()),
+		// Always be sure to batch in production.
+		tracesdk.WithBatcher(exp),
+		// Record information about this application in an Resource.
+		tracesdk.WithResource(resource.NewWithAttributes(
+			semconv.ServiceNameKey.String(pb.User_ServiceDesc.ServiceName),
+			attribute.String("environment", "development"),
+			attribute.Int64("ID", 1),
+		)),
+	)
+	return tp, nil
+}
+
+func (s *server) GetMyMessages(ctx context.Context, in *pb.GetMyMessagesRequest) (*pb.GetMyMessagesReply, error) {
+	// create grpc conn
+	conn, err := grpc.DialInsecure(ctx,
+		grpc.WithEndpoint("127.0.0.1:9000"),
+		grpc.WithMiddleware(middleware.Chain(
+			tracing.Client(
+				tracing.WithTracerProvider(s.tracer),
+				tracing.WithPropagators(
+					propagation.NewCompositeTextMapPropagator(propagation.Baggage{}, propagation.TraceContext{}),
+				),
+			),
+			recovery.Recovery())),
+		grpc.WithTimeout(2*time.Second),
+	)
+	if err != nil {
+		return nil, err
+	}
+	msg := message.NewMessageServiceClient(conn)
+	// Method of calling blog service
+	reply, err := msg.GetUserMessage(ctx, &message.GetUserMessageRequest{Id: 123, Count: in.Count})
+	if err != nil {
+		return nil, err
+	}
+	res := &pb.GetMyMessagesReply{}
+	for _, v := range reply.Messages {
+		res.Messages = append(res.Messages,&pb.Message{Content: v.Content})
+	}
+	return res, nil
+}
+
+func main() {
+	logger := log.NewStdLogger(os.Stdout)
+
+	log := log.NewHelper("user", logger)
+
+	tp, err := tracerProvider("http://jaeger:14268/api/traces")
+	if err != nil {
+		log.Error(err)
+	}
+
+	s := &server{tracer: tp}
+
+	httpSrv := http.NewServer(http.Address(":8000"))
+	httpSrv.HandlePrefix("/", pb.NewUserHandler(s,
+		http.Middleware(
+			middleware.Chain(
+				recovery.Recovery(),
+				// Configuring tracing middleware
+				tracing.Server(
+					tracing.WithTracerProvider(tp),
+					tracing.WithPropagators(
+						propagation.NewCompositeTextMapPropagator(propagation.Baggage{}, propagation.TraceContext{}),
+					),
+				),
+				logging.Server(logger),
+			),
+		)),
+	)
+
+	app := kratos.New(
+		kratos.Name(Name),
+		kratos.Server(
+			httpSrv,
+		),
+	)
+
+	if err := app.Run(); err != nil {
+		log.Error(err)
+	}
+}

examples/traces/docker-compose.yml

@@ -0,0 +1,20 @@
+version: '3'
+services:
+  traces:
+    networks:
+      - traces
+    build: .
+    ports:
+      - "8000:8000"
+      - "9000:9000"
+
+  jaeger:
+    image: jaegertracing/all-in-one:1.16
+    ports:
+      - "16686:16686"
+      - "14268:14268"
+    networks:
+      - traces
+networks:
+  traces:
+    driver: bridge

examples/traces/go.mod

@@ -0,0 +1,15 @@
+module github.com/go-kratos/kratos/examples/traces
+
+go 1.15
+
+require (
+	github.com/go-kratos/kratos/v2 v2.0.0-beta4
+	github.com/gorilla/mux v1.8.0
+	go.opentelemetry.io/otel v0.20.0
+	go.opentelemetry.io/otel/exporters/trace/jaeger v0.20.0
+	go.opentelemetry.io/otel/sdk v0.20.0
+	go.opentelemetry.io/otel/trace v0.20.0
+	google.golang.org/genproto v0.0.0-20210518161634-ec7691c0a37d
+	google.golang.org/grpc v1.37.1
+	google.golang.org/protobuf v1.26.0
+)

examples/traces/go.sum

@@ -0,0 +1,160 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
+github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
+github.com/go-kratos/kratos/v2 v2.0.0-beta4 h1:yIpOJg7iGVS58dR65O6P8b9EvX5V5gqgfX6dD8/1UkA=
+github.com/go-kratos/kratos/v2 v2.0.0-beta4/go.mod h1:ABzj/OAz9XmjyeTirYBBIHqxmeV9Sbd9NXLx9CsCgbE=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
+github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
+github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
+github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
+github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
+github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
+github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
+github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
+github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
+github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
+github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
+github.com/imdario/mergo v0.3.6/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
+github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+go.opentelemetry.io/otel v0.19.0 h1:Lenfy7QHRXPZVsw/12CWpxX6d/JkrX8wrx2vO8G80Ng=
+go.opentelemetry.io/otel v0.19.0/go.mod h1:j9bF567N9EfomkSidSfmMwIwIBuP37AMAIzVW85OxSg=
+go.opentelemetry.io/otel v0.20.0 h1:eaP0Fqu7SXHwvjiqDq83zImeehOHX8doTvU9AwXON8g=
+go.opentelemetry.io/otel v0.20.0/go.mod h1:Y3ugLH2oa81t5QO+Lty+zXf8zC9L26ax4Nzoxm/dooo=
+go.opentelemetry.io/otel/exporters/trace/jaeger v0.20.0 h1:FoclOadJNul1vUiKnZU0sKFWOZtZQq3jUzSbrX2jwNM=
+go.opentelemetry.io/otel/exporters/trace/jaeger v0.20.0/go.mod h1:10qwvAmKpvwRO5lL3KQ8EWznPp89uGfhcbK152LFWsQ=
+go.opentelemetry.io/otel/metric v0.19.0 h1:dtZ1Ju44gkJkYvo+3qGqVXmf88tc+a42edOywypengg=
+go.opentelemetry.io/otel/metric v0.19.0/go.mod h1:8f9fglJPRnXuskQmKpnad31lcLJ2VmNNqIsx/uIwBSc=
+go.opentelemetry.io/otel/metric v0.20.0 h1:4kzhXFP+btKm4jwxpjIqjs41A7MakRFUS86bqLHTIw8=
+go.opentelemetry.io/otel/metric v0.20.0/go.mod h1:598I5tYlH1vzBjn+BTuhzTCSb/9debfNp6R3s7Pr1eU=
+go.opentelemetry.io/otel/oteltest v0.19.0 h1:YVfA0ByROYqTwOxqHVZYZExzEpfZor+MU1rU+ip2v9Q=
+go.opentelemetry.io/otel/oteltest v0.19.0/go.mod h1:tI4yxwh8U21v7JD6R3BcA/2+RBoTKFexE/PJ/nSO7IA=
+go.opentelemetry.io/otel/oteltest v0.20.0 h1:HiITxCawalo5vQzdHfKeZurV8x7ljcqAgiWzF6Vaeaw=
+go.opentelemetry.io/otel/oteltest v0.20.0/go.mod h1:L7bgKf9ZB7qCwT9Up7i9/pn0PWIa9FqQ2IQ8LoxiGnw=
+go.opentelemetry.io/otel/sdk v0.20.0 h1:JsxtGXd06J8jrnya7fdI/U/MR6yXA5DtbZy+qoHQlr8=
+go.opentelemetry.io/otel/sdk v0.20.0/go.mod h1:g/IcepuwNsoiX5Byy2nNV0ySUF1em498m7hBWC279Yc=
+go.opentelemetry.io/otel/trace v0.19.0 h1:1ucYlenXIDA1OlHVLDZKX0ObXV5RLaq06DtUKz5e5zc=
+go.opentelemetry.io/otel/trace v0.19.0/go.mod h1:4IXiNextNOpPnRlI4ryK69mn5iC84bjBWZQA5DXz/qg=
+go.opentelemetry.io/otel/trace v0.20.0 h1:1DL6EXUdcg95gukhuRRvLDO/4X5THh/5dIV52lqtnbw=
+go.opentelemetry.io/otel/trace v0.20.0/go.mod h1:6GjCW8zgDjwGHGa6GkyeB8+/5vjT16gUEi0Nf1iBdgw=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
+golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
+golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
+golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
+golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
+golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4 h1:b0LrWgu8+q7z4J+0Y3Umo5q1dL7NXBkKBWkaVkAq17E=
+golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4/go.mod h1:RBQZq4jEuRlivfhVLdyRGr576XBO4/greRjx4P4O3yc=
+golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210315160823-c6e025ad8005/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210320140829-1e4c9ba3b0c4 h1:EZ2mChiOa8udjfp6rRmswTbtZN/QzUQp4ptM4rnjHvc=
+golang.org/x/sys v0.0.0-20210320140829-1e4c9ba3b0c4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=
+golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
+golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
+google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/genproto v0.0.0-20210114201628-6edceaf6022f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20210518161634-ec7691c0a37d h1:bRz6UmsZEz/CzoTjUDp4ZcdguhSWi6CyU299wMQBpZU=
+google.golang.org/genproto v0.0.0-20210518161634-ec7691c0a37d/go.mod h1:P3QM42oQyzQSnHPnZ/vqoCdDmzH28fzWByN9asMeM8A=
+google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
+google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.36.1/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.37.1 h1:ARnQJNWxGyYJpdf/JXscNlQr/uv607ZPU9Z7ogHi+iI=
+google.golang.org/grpc v1.37.1/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
+google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
+google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
+google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
+google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
+google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

examples/traces/start.sh

@@ -0,0 +1,2 @@
+/app/user &
+nohup /app/message