Fix API forward events for shims

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

api/next.pb.txt

@@ -4211,28 +4211,61 @@ file {
   dependency: "google/protobuf/empty.proto"
   dependency: "google/protobuf/timestamp.proto"
   message_type {
-    name: "PublishRequest"
+    name: "ForwardRequest"
+    field {
+      name: "envelope"
+      number: 1
+      label: LABEL_OPTIONAL
+      type: TYPE_MESSAGE
+      type_name: ".containerd.services.events.ttrpc.v1.Envelope"
+      json_name: "envelope"
+    }
+  }
+  message_type {
+    name: "Envelope"
+    field {
+      name: "timestamp"
+      number: 1
+      label: LABEL_OPTIONAL
+      type: TYPE_MESSAGE
+      type_name: ".google.protobuf.Timestamp"
+      options {
+        65001: 0
+        65010: 1
+      }
+      json_name: "timestamp"
+    }
+    field {
+      name: "namespace"
+      number: 2
+      label: LABEL_OPTIONAL
+      type: TYPE_STRING
+      json_name: "namespace"
+    }
     field {
       name: "topic"
-      number: 1
+      number: 3
       label: LABEL_OPTIONAL
       type: TYPE_STRING
       json_name: "topic"
     }
     field {
       name: "event"
-      number: 2
+      number: 4
       label: LABEL_OPTIONAL
       type: TYPE_MESSAGE
       type_name: ".google.protobuf.Any"
       json_name: "event"
     }
+    options {
+      64400: 1
+    }
   }
   service {
     name: "Events"
     method {
-      name: "Publish"
+      name: "Forward"
-      input_type: ".containerd.services.events.ttrpc.v1.PublishRequest"
+      input_type: ".containerd.services.events.ttrpc.v1.ForwardRequest"
       output_type: ".google.protobuf.Empty"
     }
   }

api/services/ttrpc/events/v1/events.pb.go

@@ -7,18 +7,22 @@ import (
 	context "context"
 	fmt "fmt"
 	github_com_containerd_ttrpc "github.com/containerd/ttrpc"
+	github_com_containerd_typeurl "github.com/containerd/typeurl"
 	proto "github.com/gogo/protobuf/proto"
+	github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
 	types "github.com/gogo/protobuf/types"
 	io "io"
 	math "math"
 	reflect "reflect"
 	strings "strings"
+	time "time"
 )
 
 // Reference imports to suppress errors if they are not otherwise used.
 var _ = proto.Marshal
 var _ = fmt.Errorf
 var _ = math.Inf
+var _ = time.Kitchen
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the proto package it is being compiled against.
@@ -26,25 +30,24 @@ var _ = math.Inf
 // proto package needs to be updated.
 const _ = proto.GoGoProtoPackageIsVersion2 // please upgrade the proto package
 
-type PublishRequest struct {
+type ForwardRequest struct {
-	Topic                string     `protobuf:"bytes,1,opt,name=topic,proto3" json:"topic,omitempty"`
+	Envelope             *Envelope `protobuf:"bytes,1,opt,name=envelope,proto3" json:"envelope,omitempty"`
-	Event                *types.Any `protobuf:"bytes,2,opt,name=event,proto3" json:"event,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}  `json:"-"`
-	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
+	XXX_unrecognized     []byte    `json:"-"`
-	XXX_unrecognized     []byte     `json:"-"`
+	XXX_sizecache        int32     `json:"-"`
-	XXX_sizecache        int32      `json:"-"`
 }
 
-func (m *PublishRequest) Reset()      { *m = PublishRequest{} }
+func (m *ForwardRequest) Reset()      { *m = ForwardRequest{} }
-func (*PublishRequest) ProtoMessage() {}
+func (*ForwardRequest) ProtoMessage() {}
-func (*PublishRequest) Descriptor() ([]byte, []int) {
+func (*ForwardRequest) Descriptor() ([]byte, []int) {
 	return fileDescriptor_19f98672016720b5, []int{0}
 }
-func (m *PublishRequest) XXX_Unmarshal(b []byte) error {
+func (m *ForwardRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
 }
-func (m *PublishRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+func (m *ForwardRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	if deterministic {
-		return xxx_messageInfo_PublishRequest.Marshal(b, m, deterministic)
+		return xxx_messageInfo_ForwardRequest.Marshal(b, m, deterministic)
 	} else {
 		b = b[:cap(b)]
 		n, err := m.MarshalTo(b)
@@ -54,20 +57,63 @@ func (m *PublishRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, erro
 		return b[:n], nil
 	}
 }
-func (m *PublishRequest) XXX_Merge(src proto.Message) {
+func (m *ForwardRequest) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_PublishRequest.Merge(m, src)
+	xxx_messageInfo_ForwardRequest.Merge(m, src)
 }
-func (m *PublishRequest) XXX_Size() int {
+func (m *ForwardRequest) XXX_Size() int {
 	return m.Size()
 }
-func (m *PublishRequest) XXX_DiscardUnknown() {
+func (m *ForwardRequest) XXX_DiscardUnknown() {
-	xxx_messageInfo_PublishRequest.DiscardUnknown(m)
+	xxx_messageInfo_ForwardRequest.DiscardUnknown(m)
 }
 
-var xxx_messageInfo_PublishRequest proto.InternalMessageInfo
+var xxx_messageInfo_ForwardRequest proto.InternalMessageInfo
+
+type Envelope struct {
+	Timestamp            time.Time  `protobuf:"bytes,1,opt,name=timestamp,proto3,stdtime" json:"timestamp"`
+	Namespace            string     `protobuf:"bytes,2,opt,name=namespace,proto3" json:"namespace,omitempty"`
+	Topic                string     `protobuf:"bytes,3,opt,name=topic,proto3" json:"topic,omitempty"`
+	Event                *types.Any `protobuf:"bytes,4,opt,name=event,proto3" json:"event,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
+	XXX_unrecognized     []byte     `json:"-"`
+	XXX_sizecache        int32      `json:"-"`
+}
+
+func (m *Envelope) Reset()      { *m = Envelope{} }
+func (*Envelope) ProtoMessage() {}
+func (*Envelope) Descriptor() ([]byte, []int) {
+	return fileDescriptor_19f98672016720b5, []int{1}
+}
+func (m *Envelope) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *Envelope) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_Envelope.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalTo(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *Envelope) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Envelope.Merge(m, src)
+}
+func (m *Envelope) XXX_Size() int {
+	return m.Size()
+}
+func (m *Envelope) XXX_DiscardUnknown() {
+	xxx_messageInfo_Envelope.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Envelope proto.InternalMessageInfo
 
 func init() {
-	proto.RegisterType((*PublishRequest)(nil), "containerd.services.events.ttrpc.v1.PublishRequest")
+	proto.RegisterType((*ForwardRequest)(nil), "containerd.services.events.ttrpc.v1.ForwardRequest")
+	proto.RegisterType((*Envelope)(nil), "containerd.services.events.ttrpc.v1.Envelope")
 }
 
 func init() {
@@ -75,30 +121,62 @@ func init() {
 }
 
 var fileDescriptor_19f98672016720b5 = []byte{
-	// 311 bytes of a gzipped FileDescriptorProto
+	// 396 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xa4, 0x51, 0x3f, 0x4b, 0x33, 0x31,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xa4, 0x52, 0xc1, 0x8e, 0xd3, 0x30,
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+	0xff, 0xde, 0xd2, 0xbb, 0xbb, 0x17, 0x36, 0xda, 0xfc, 0x9c, 0xe1, 0x87, 0xd5, 0xda, 0x77, 0x7e,
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+	0xbd, 0xb8, 0xd6, 0x8b, 0x7d, 0x5a, 0xa3, 0xb1, 0x33, 0x46, 0x93, 0x13, 0x9b, 0x79, 0xf5, 0x27,
+	0x00, 0x00, 0xff, 0xff, 0xd4, 0x90, 0xbd, 0x09, 0x04, 0x03, 0x00, 0x00,
 }
 
-func (m *PublishRequest) Marshal() (dAtA []byte, err error) {
+// Field returns the value for the given fieldpath as a string, if defined.
+// If the value is not defined, the second value will be false.
+func (m *Envelope) Field(fieldpath []string) (string, bool) {
+	if len(fieldpath) == 0 {
+		return "", false
+	}
+
+	switch fieldpath[0] {
+	// unhandled: timestamp
+	case "namespace":
+		return string(m.Namespace), len(m.Namespace) > 0
+	case "topic":
+		return string(m.Topic), len(m.Topic) > 0
+	case "event":
+		decoded, err := github_com_containerd_typeurl.UnmarshalAny(m.Event)
+		if err != nil {
+			return "", false
+		}
+
+		adaptor, ok := decoded.(interface{ Field([]string) (string, bool) })
+		if !ok {
+			return "", false
+		}
+		return adaptor.Field(fieldpath[1:])
+	}
+	return "", false
+}
+func (m *ForwardRequest) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
 	n, err := m.MarshalTo(dAtA)
@@ -108,26 +186,71 @@ func (m *PublishRequest) Marshal() (dAtA []byte, err error) {
 	return dAtA[:n], nil
 }
 
-func (m *PublishRequest) MarshalTo(dAtA []byte) (int, error) {
+func (m *ForwardRequest) MarshalTo(dAtA []byte) (int, error) {
 	var i int
 	_ = i
 	var l int
 	_ = l
-	if len(m.Topic) > 0 {
+	if m.Envelope != nil {
 		dAtA[i] = 0xa
 		i++
+		i = encodeVarintEvents(dAtA, i, uint64(m.Envelope.Size()))
+		n1, err := m.Envelope.MarshalTo(dAtA[i:])
+		if err != nil {
+			return 0, err
+		}
+		i += n1
+	}
+	if m.XXX_unrecognized != nil {
+		i += copy(dAtA[i:], m.XXX_unrecognized)
+	}
+	return i, nil
+}
+
+func (m *Envelope) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *Envelope) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	dAtA[i] = 0xa
+	i++
+	i = encodeVarintEvents(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.Timestamp)))
+	n2, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.Timestamp, dAtA[i:])
+	if err != nil {
+		return 0, err
+	}
+	i += n2
+	if len(m.Namespace) > 0 {
+		dAtA[i] = 0x12
+		i++
+		i = encodeVarintEvents(dAtA, i, uint64(len(m.Namespace)))
+		i += copy(dAtA[i:], m.Namespace)
+	}
+	if len(m.Topic) > 0 {
+		dAtA[i] = 0x1a
+		i++
 		i = encodeVarintEvents(dAtA, i, uint64(len(m.Topic)))
 		i += copy(dAtA[i:], m.Topic)
 	}
 	if m.Event != nil {
-		dAtA[i] = 0x12
+		dAtA[i] = 0x22
 		i++
 		i = encodeVarintEvents(dAtA, i, uint64(m.Event.Size()))
-		n1, err := m.Event.MarshalTo(dAtA[i:])
+		n3, err := m.Event.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n1
+		i += n3
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -144,12 +267,34 @@ func encodeVarintEvents(dAtA []byte, offset int, v uint64) int {
 	dAtA[offset] = uint8(v)
 	return offset + 1
 }
-func (m *PublishRequest) Size() (n int) {
+func (m *ForwardRequest) Size() (n int) {
 	if m == nil {
 		return 0
 	}
 	var l int
 	_ = l
+	if m.Envelope != nil {
+		l = m.Envelope.Size()
+		n += 1 + l + sovEvents(uint64(l))
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func (m *Envelope) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.Timestamp)
+	n += 1 + l + sovEvents(uint64(l))
+	l = len(m.Namespace)
+	if l > 0 {
+		n += 1 + l + sovEvents(uint64(l))
+	}
 	l = len(m.Topic)
 	if l > 0 {
 		n += 1 + l + sovEvents(uint64(l))
@@ -177,11 +322,24 @@ func sovEvents(x uint64) (n int) {
 func sozEvents(x uint64) (n int) {
 	return sovEvents(uint64((x << 1) ^ uint64((int64(x) >> 63))))
 }
-func (this *PublishRequest) String() string {
+func (this *ForwardRequest) String() string {
 	if this == nil {
 		return "nil"
 	}
-	s := strings.Join([]string{`&PublishRequest{`,
+	s := strings.Join([]string{`&ForwardRequest{`,
+		`Envelope:` + strings.Replace(fmt.Sprintf("%v", this.Envelope), "Envelope", "Envelope", 1) + `,`,
+		`XXX_unrecognized:` + fmt.Sprintf("%v", this.XXX_unrecognized) + `,`,
+		`}`,
+	}, "")
+	return s
+}
+func (this *Envelope) String() string {
+	if this == nil {
+		return "nil"
+	}
+	s := strings.Join([]string{`&Envelope{`,
+		`Timestamp:` + strings.Replace(strings.Replace(this.Timestamp.String(), "Timestamp", "types.Timestamp", 1), `&`, ``, 1) + `,`,
+		`Namespace:` + fmt.Sprintf("%v", this.Namespace) + `,`,
 		`Topic:` + fmt.Sprintf("%v", this.Topic) + `,`,
 		`Event:` + strings.Replace(fmt.Sprintf("%v", this.Event), "Any", "types.Any", 1) + `,`,
 		`XXX_unrecognized:` + fmt.Sprintf("%v", this.XXX_unrecognized) + `,`,
@@ -199,17 +357,17 @@ func valueToStringEvents(v interface{}) string {
 }
 
 type EventsService interface {
-	Publish(ctx context.Context, req *PublishRequest) (*types.Empty, error)
+	Forward(ctx context.Context, req *ForwardRequest) (*types.Empty, error)
 }
 
 func RegisterEventsService(srv *github_com_containerd_ttrpc.Server, svc EventsService) {
 	srv.Register("containerd.services.events.ttrpc.v1.Events", map[string]github_com_containerd_ttrpc.Method{
-		"Publish": func(ctx context.Context, unmarshal func(interface{}) error) (interface{}, error) {
+		"Forward": func(ctx context.Context, unmarshal func(interface{}) error) (interface{}, error) {
-			var req PublishRequest
+			var req ForwardRequest
 			if err := unmarshal(&req); err != nil {
 				return nil, err
 			}
-			return svc.Publish(ctx, &req)
+			return svc.Forward(ctx, &req)
 		},
 	})
 }
@@ -224,14 +382,14 @@ func NewEventsClient(client *github_com_containerd_ttrpc.Client) EventsService {
 	}
 }
 
-func (c *eventsClient) Publish(ctx context.Context, req *PublishRequest) (*types.Empty, error) {
+func (c *eventsClient) Forward(ctx context.Context, req *ForwardRequest) (*types.Empty, error) {
 	var resp types.Empty
-	if err := c.client.Call(ctx, "containerd.services.events.ttrpc.v1.Events", "Publish", req, &resp); err != nil {
+	if err := c.client.Call(ctx, "containerd.services.events.ttrpc.v1.Events", "Forward", req, &resp); err != nil {
 		return nil, err
 	}
 	return &resp, nil
 }
-func (m *PublishRequest) Unmarshal(dAtA []byte) error {
+func (m *ForwardRequest) Unmarshal(dAtA []byte) error {
 	l := len(dAtA)
 	iNdEx := 0
 	for iNdEx < l {
@@ -254,13 +412,168 @@ func (m *PublishRequest) Unmarshal(dAtA []byte) error {
 		fieldNum := int32(wire >> 3)
 		wireType := int(wire & 0x7)
 		if wireType == 4 {
-			return fmt.Errorf("proto: PublishRequest: wiretype end group for non-group")
+			return fmt.Errorf("proto: ForwardRequest: wiretype end group for non-group")
 		}
 		if fieldNum <= 0 {
-			return fmt.Errorf("proto: PublishRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+			return fmt.Errorf("proto: ForwardRequest: illegal tag %d (wire type %d)", fieldNum, wire)
 		}
 		switch fieldNum {
 		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Envelope", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowEvents
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthEvents
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthEvents
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Envelope == nil {
+				m.Envelope = &Envelope{}
+			}
+			if err := m.Envelope.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipEvents(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthEvents
+			}
+			if (iNdEx + skippy) < 0 {
+				return ErrInvalidLengthEvents
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *Envelope) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowEvents
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: Envelope: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: Envelope: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Timestamp", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowEvents
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthEvents
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthEvents
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.Timestamp, dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Namespace", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowEvents
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthEvents
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthEvents
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Namespace = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 3:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Topic", wireType)
 			}
@@ -292,7 +605,7 @@ func (m *PublishRequest) Unmarshal(dAtA []byte) error {
 			}
 			m.Topic = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
-		case 2:
+		case 4:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Event", wireType)
 			}

api/services/ttrpc/events/v1/events.proto

@@ -11,15 +11,22 @@ import "google/protobuf/timestamp.proto";
 option go_package = "github.com/containerd/containerd/api/services/ttrpc/events/v1;events";
 
 service Events {
-	// Publish an event to a topic.
+	// Forward sends an event that has already been packaged into an envelope
+	// with a timestamp and namespace.
 	//
-	// The event will be packed into a timestamp envelope with the namespace
+	// This is useful if earlier timestamping is required or when forwarding on
-	// introspected from the context. The envelope will then be dispatched.
+	// behalf of another component, namespace or publisher.
-	rpc Publish(PublishRequest) returns (google.protobuf.Empty);
+	rpc Forward(ForwardRequest) returns (google.protobuf.Empty);
-
 }
 
-message PublishRequest {
+message ForwardRequest {
-	string topic = 1;
+	Envelope envelope = 1;
-	google.protobuf.Any event = 2;
+}
+
+message Envelope {
+	option (containerd.plugin.fieldpath) = true;
+	google.protobuf.Timestamp timestamp = 1 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
+	string namespace = 2;
+	string topic = 3;
+	google.protobuf.Any event = 4;
 }

runtime/v2/shim/shim.go

@@ -295,13 +295,21 @@ type remoteEventsPublisher struct {
 }
 
 func (l *remoteEventsPublisher) Publish(ctx context.Context, topic string, event events.Event) error {
+	ns, err := namespaces.NamespaceRequired(ctx)
+	if err != nil {
+		return err
+	}
 	any, err := typeurl.MarshalAny(event)
 	if err != nil {
 		return err
 	}
-	_, err = l.client.Publish(ctx, &v1.PublishRequest{
+	_, err = l.client.Forward(ctx, &v1.ForwardRequest{
-		Topic: topic,
+		Envelope: &v1.Envelope{
-		Event: any,
+			Timestamp: time.Now(),
+			Namespace: ns,
+			Topic:     topic,
+			Event:     any,
+		},
 	})
 	return err
 }

services/events/ttrpc.go

@@ -21,6 +21,7 @@ import (
 
 	api "github.com/containerd/containerd/api/services/ttrpc/events/v1"
 	"github.com/containerd/containerd/errdefs"
+	"github.com/containerd/containerd/events"
 	"github.com/containerd/containerd/events/exchange"
 	ptypes "github.com/gogo/protobuf/types"
 )
@@ -29,10 +30,19 @@ type ttrpcService struct {
 	events *exchange.Exchange
 }
 
-func (s *ttrpcService) Publish(ctx context.Context, r *api.PublishRequest) (*ptypes.Empty, error) {
+func (s *ttrpcService) Forward(ctx context.Context, r *api.ForwardRequest) (*ptypes.Empty, error) {
-	if err := s.events.Publish(ctx, r.Topic, r.Event); err != nil {
+	if err := s.events.Forward(ctx, fromTProto(r.Envelope)); err != nil {
 		return nil, errdefs.ToGRPC(err)
 	}
 
 	return &ptypes.Empty{}, nil
 }
+
+func fromTProto(env *api.Envelope) *events.Envelope {
+	return &events.Envelope{
+		Timestamp: env.Timestamp,
+		Namespace: env.Namespace,
+		Topic:     env.Topic,
+		Event:     env.Event,
+	}
+}