Include stream-related information in peering endpoints

agent/consul/leader_peering_test.go

@@ -1144,15 +1144,13 @@ func TestLeader_Peering_ImportedExportedServicesCount(t *testing.T) {
 				resp, err := peeringClient2.PeeringRead(context.Background(), &pbpeering.PeeringReadRequest{Name: "my-peer-s1"})
 				require.NoError(r, err)
 				require.NotNil(r, resp.Peering)
-				require.Equal(r, tc.expectedImportedServsCount, int(resp.Peering.ImportedServiceCount))
+				require.Equal(r, tc.expectedImportedServsCount, len(resp.Peering.StreamStatus.ImportedServices))
-				require.Equal(r, tc.expectedImportedServsCount, len(resp.Peering.ImportedServices))
 
 				// on List
 				resp2, err2 := peeringClient2.PeeringList(context.Background(), &pbpeering.PeeringListRequest{})
 				require.NoError(r, err2)
 				require.NotEmpty(r, resp2.Peerings)
-				require.Equal(r, tc.expectedExportedServsCount, int(resp2.Peerings[0].ImportedServiceCount))
+				require.Equal(r, tc.expectedExportedServsCount, len(resp2.Peerings[0].StreamStatus.ImportedServices))
-				require.Equal(r, tc.expectedExportedServsCount, len(resp2.Peerings[0].ImportedServices))
 			})
 
 			// Check that exported services count on S1 are what we expect
@@ -1161,15 +1159,13 @@ func TestLeader_Peering_ImportedExportedServicesCount(t *testing.T) {
 				resp, err := peeringClient.PeeringRead(context.Background(), &pbpeering.PeeringReadRequest{Name: "my-peer-s2"})
 				require.NoError(r, err)
 				require.NotNil(r, resp.Peering)
-				require.Equal(r, tc.expectedImportedServsCount, int(resp.Peering.ExportedServiceCount))
+				require.Equal(r, tc.expectedImportedServsCount, len(resp.Peering.StreamStatus.ExportedServices))
-				require.Equal(r, tc.expectedImportedServsCount, len(resp.Peering.ExportedServices))
 
 				// on List
 				resp2, err2 := peeringClient.PeeringList(context.Background(), &pbpeering.PeeringListRequest{})
 				require.NoError(r, err2)
 				require.NotEmpty(r, resp2.Peerings)
-				require.Equal(r, tc.expectedExportedServsCount, int(resp2.Peerings[0].ExportedServiceCount))
+				require.Equal(r, tc.expectedExportedServsCount, len(resp2.Peerings[0].StreamStatus.ExportedServices))
-				require.Equal(r, tc.expectedExportedServsCount, len(resp2.Peerings[0].ExportedServices))
 			})
 		})
 	}

agent/consul/state/peering.go

@@ -584,12 +584,7 @@ func (s *Store) PeeringWrite(idx uint64, req *pbpeering.PeeringWriteRequest) err
 		if req.Peering.State == pbpeering.PeeringState_UNDEFINED {
 			req.Peering.State = existing.State
 		}
-		// TODO(peering): Confirm behavior when /peering/token is called more than once.
+		req.Peering.StreamStatus = nil
-		// We may need to avoid clobbering existing values.
-		req.Peering.ImportedServiceCount = existing.ImportedServiceCount
-		req.Peering.ExportedServiceCount = existing.ExportedServiceCount
-		req.Peering.ImportedServices = existing.ImportedServices
-		req.Peering.ExportedServices = existing.ExportedServices
 		req.Peering.CreateIndex = existing.CreateIndex
 		req.Peering.ModifyIndex = idx
 	} else {

agent/grpc-external/services/peerstream/stream_resources.go

@@ -353,6 +353,8 @@ func (s *Server) realHandleStream(streamReq HandleStreamRequest) error {
 
 		if err != nil {
 			status.TrackSendError(err.Error())
+		} else {
+			status.TrackSendSuccess()
 		}
 		return err
 	}

agent/grpc-external/services/peerstream/stream_tracker.go

@@ -214,6 +214,9 @@ type Status struct {
 	// LastSendErrorMessage tracks the last error message when sending into the stream.
 	LastSendErrorMessage string
 
+	// LastSendSuccess tracks the time we last successfully sent a resource TO the peer.
+	LastSendSuccess time.Time
+
 	// LastRecvHeartbeat tracks when we last received a heartbeat from our peer.
 	LastRecvHeartbeat time.Time
 
@@ -271,6 +274,12 @@ func (s *MutableStatus) TrackSendError(error string) {
 	s.mu.Unlock()
 }
 
+func (s *MutableStatus) TrackSendSuccess() {
+	s.mu.Lock()
+	s.LastSendSuccess = s.timeNow().UTC()
+	s.mu.Unlock()
+}
+
 // TrackRecvResourceSuccess tracks receiving a replicated resource.
 func (s *MutableStatus) TrackRecvResourceSuccess() {
 	s.mu.Lock()

agent/peering_endpoint_test.go

@@ -375,11 +375,8 @@ func TestHTTP_Peering_Read(t *testing.T) {
 		require.Equal(t, foo.Peering.Name, apiResp.Name)
 		require.Equal(t, foo.Peering.Meta, apiResp.Meta)
 
-		require.Equal(t, uint64(0), apiResp.ImportedServiceCount)
+		require.Equal(t, 0, len(apiResp.StreamStatus.ImportedServices))
-		require.Equal(t, uint64(0), apiResp.ExportedServiceCount)
+		require.Equal(t, 0, len(apiResp.StreamStatus.ExportedServices))
-		require.Equal(t, 0, len(apiResp.ImportedServices))
-		require.Equal(t, 0, len(apiResp.ExportedServices))
-
 	})
 
 	t.Run("not found", func(t *testing.T) {
@@ -507,10 +504,8 @@ func TestHTTP_Peering_List(t *testing.T) {
 		require.Len(t, apiResp, 2)
 
 		for _, p := range apiResp {
-			require.Equal(t, uint64(0), p.ImportedServiceCount)
+			require.Equal(t, 0, len(p.StreamStatus.ImportedServices))
-			require.Equal(t, uint64(0), p.ExportedServiceCount)
+			require.Equal(t, 0, len(p.StreamStatus.ExportedServices))
-			require.Equal(t, 0, len(p.ImportedServices))
-			require.Equal(t, 0, len(p.ExportedServices))
 		}
 	})
 }

agent/rpc/peering/service.go

@@ -645,11 +645,26 @@ func (s *Server) reconcilePeering(peering *pbpeering.Peering) *pbpeering.Peering
 			cp.State = pbpeering.PeeringState_FAILING
 		}
 
-		// add imported & exported services
+		latest := func(tt ...time.Time) time.Time {
-		cp.ImportedServices = streamState.ImportedServices
+			latest := time.Time{}
-		cp.ExportedServices = streamState.ExportedServices
+			for _, t := range tt {
-		cp.ImportedServiceCount = streamState.GetImportedServicesCount()
+				if t.After(latest) {
-		cp.ExportedServiceCount = streamState.GetExportedServicesCount()
+					latest = t
+				}
+			}
+			return latest
+		}
+
+		lastRecv := latest(streamState.LastRecvHeartbeat, streamState.LastRecvError, streamState.LastRecvResourceSuccess)
+		lastSend := latest(streamState.LastSendError, streamState.LastSendSuccess)
+
+		cp.StreamStatus = &pbpeering.StreamStatus{
+			ImportedServices: streamState.ImportedServices,
+			ExportedServices: streamState.ExportedServices,
+			LastHeartbeat:    structs.TimeToProto(streamState.LastRecvHeartbeat),
+			LastReceive:      structs.TimeToProto(lastRecv),
+			LastSend:         structs.TimeToProto(lastSend),
+		}
 
 		return cp
 	}

api/peering.go

@@ -62,20 +62,27 @@ type Peering struct {
 	PeerServerName string `json:",omitempty"`
 	// PeerServerAddresses contains all the connection addresses for the remote peer.
 	PeerServerAddresses []string `json:",omitempty"`
-	// ImportedServiceCount is the count of how many services are imported from this peering.
+	// StreamStatus contains information computed on read based on the state of the stream.
-	ImportedServiceCount uint64
+	StreamStatus PeeringStreamStatus
-	// ExportedServiceCount is the count of how many services are exported to this peering.
-	ExportedServiceCount uint64
-	// ImportedServices is the list of services imported from this peering.
-	ImportedServices []string
-	// ExportedServices is the list of services exported to this peering.
-	ExportedServices []string
 	// CreateIndex is the Raft index at which the Peering was created.
 	CreateIndex uint64
 	// ModifyIndex is the latest Raft index at which the Peering. was modified.
 	ModifyIndex uint64
 }
 
+type PeeringStreamStatus struct {
+	// ImportedServices is the list of services imported from this peering.
+	ImportedServices []string
+	// ExportedServices is the list of services exported to this peering.
+	ExportedServices []string
+	// LastHeartbeat represents when the last heartbeat message was received.
+	LastHeartbeat time.Time
+	// LastReceive represents when any message was last received, regardless of success or error.
+	LastReceive time.Time
+	// LastSend represents when any message was last sent, regardless of success or error.
+	LastSend time.Time
+}
+
 type PeeringReadResponse struct {
 	Peering *Peering
 }

api/peering_test.go

@@ -26,10 +26,7 @@ func peerExistsInPeerListings(peer *Peering, peerings []*Peering) bool {
 			(peer.State == aPeer.State) &&
 			(peer.CreateIndex == aPeer.CreateIndex) &&
 			(peer.ModifyIndex == aPeer.ModifyIndex) &&
-			(peer.ImportedServiceCount == aPeer.ImportedServiceCount) &&
+			(reflect.DeepEqual(peer.StreamStatus, aPeer.StreamStatus))
-			(peer.ExportedServiceCount == aPeer.ExportedServiceCount) &&
-			reflect.DeepEqual(peer.ImportedServices, aPeer.ImportedServices) &&
-			reflect.DeepEqual(peer.ExportedServices, aPeer.ExportedServices)
 
 		if isEqual {
 			return true

command/peering/list/list.go

@@ -90,6 +90,7 @@ func (c *cmd) Run(args []string) int {
 	}
 
 	result := make([]string, 0, len(list))
+	// TODO(peering): consider adding more StreamStatus fields here
 	header := "Name\x1fState\x1fImported Svcs\x1fExported Svcs\x1fMeta"
 	result = append(result, header)
 	for _, peer := range list {
@@ -99,7 +100,7 @@ func (c *cmd) Run(args []string) int {
 		}
 		meta := strings.Join(metaPairs, ",")
 		line := fmt.Sprintf("%s\x1f%s\x1f%d\x1f%d\x1f%s",
-			peer.Name, peer.State, len(peer.ImportedServices), len(peer.ExportedServices), meta)
+			peer.Name, peer.State, len(peer.StreamStatus.ImportedServices), len(peer.StreamStatus.ExportedServices), meta)
 		result = append(result, line)
 	}
 

command/peering/read/read.go

@@ -130,9 +130,12 @@ func formatPeering(peering *api.Peering) string {
 	}
 
 	buffer.WriteString("\n")
-	buffer.WriteString(fmt.Sprintf("Imported Services: %d\n", len(peering.ImportedServices)))
+	buffer.WriteString(fmt.Sprintf("Imported Services: %d\n", len(peering.StreamStatus.ImportedServices)))
-	buffer.WriteString(fmt.Sprintf("Exported Services: %d\n", len(peering.ExportedServices)))
+	buffer.WriteString(fmt.Sprintf("Exported Services: %d\n", len(peering.StreamStatus.ExportedServices)))
-
+	buffer.WriteString("\n")
+	buffer.WriteString(fmt.Sprintf("Last Heartbeat:    %v\n", peering.StreamStatus.LastHeartbeat))
+	buffer.WriteString(fmt.Sprintf("Last Send:         %v\n", peering.StreamStatus.LastSend))
+	buffer.WriteString(fmt.Sprintf("Last Receive:      %v\n", peering.StreamStatus.LastReceive))
 	buffer.WriteString("\n")
 	buffer.WriteString(fmt.Sprintf("Create Index: %d\n", peering.CreateIndex))
 	buffer.WriteString(fmt.Sprintf("Modify Index: %d\n", peering.ModifyIndex))

command/peering/read/read_test.go

@@ -109,6 +109,9 @@ func TestReadCommand(t *testing.T) {
 		require.Contains(t, output, "env=production")
 		require.Contains(t, output, "Imported Services")
 		require.Contains(t, output, "Exported Services")
+		require.Contains(t, output, "Last Heartbeat")
+		require.Contains(t, output, "Last Send")
+		require.Contains(t, output, "Last Receive")
 	})
 
 	t.Run("read with json", func(t *testing.T) {

proto/pbpeering/peering.gen.go

@@ -76,10 +76,7 @@ func PeeringToAPI(s *Peering, t *api.Peering) {
 	t.PeerCAPems = s.PeerCAPems
 	t.PeerServerName = s.PeerServerName
 	t.PeerServerAddresses = s.PeerServerAddresses
-	t.ImportedServiceCount = s.ImportedServiceCount
+	t.StreamStatus = StreamStatusToAPI(s.StreamStatus)
-	t.ExportedServiceCount = s.ExportedServiceCount
-	t.ImportedServices = s.ImportedServices
-	t.ExportedServices = s.ExportedServices
 	t.CreateIndex = s.CreateIndex
 	t.ModifyIndex = s.ModifyIndex
 }
@@ -97,10 +94,7 @@ func PeeringFromAPI(t *api.Peering, s *Peering) {
 	s.PeerCAPems = t.PeerCAPems
 	s.PeerServerName = t.PeerServerName
 	s.PeerServerAddresses = t.PeerServerAddresses
-	s.ImportedServiceCount = t.ImportedServiceCount
+	s.StreamStatus = StreamStatusFromAPI(t.StreamStatus)
-	s.ExportedServiceCount = t.ExportedServiceCount
-	s.ImportedServices = t.ImportedServices
-	s.ExportedServices = t.ExportedServices
 	s.CreateIndex = t.CreateIndex
 	s.ModifyIndex = t.ModifyIndex
 }

proto/pbpeering/peering.go

@@ -142,6 +142,26 @@ func PeeringStateFromAPI(t api.PeeringState) PeeringState {
 	}
 }
 
+func StreamStatusToAPI(status *StreamStatus) api.PeeringStreamStatus {
+	return api.PeeringStreamStatus{
+		ImportedServices: status.ImportedServices,
+		ExportedServices: status.ExportedServices,
+		LastHeartbeat:    structs.TimeFromProto(status.LastHeartbeat),
+		LastReceive:      structs.TimeFromProto(status.LastReceive),
+		LastSend:         structs.TimeFromProto(status.LastSend),
+	}
+}
+
+func StreamStatusFromAPI(status api.PeeringStreamStatus) *StreamStatus {
+	return &StreamStatus{
+		ImportedServices: status.ImportedServices,
+		ExportedServices: status.ExportedServices,
+		LastHeartbeat:    structs.TimeToProto(status.LastHeartbeat),
+		LastReceive:      structs.TimeToProto(status.LastReceive),
+		LastSend:         structs.TimeToProto(status.LastSend),
+	}
+}
+
 func (p *Peering) IsActive() bool {
 	if p == nil || p.State == PeeringState_TERMINATED {
 		return false

proto/pbpeering/peering.pb.binary.go

@@ -97,6 +97,16 @@ func (msg *Peering) UnmarshalBinary(b []byte) error {
 	return proto.Unmarshal(b, msg)
 }
 
+// MarshalBinary implements encoding.BinaryMarshaler
+func (msg *StreamStatus) MarshalBinary() ([]byte, error) {
+	return proto.Marshal(msg)
+}
+
+// UnmarshalBinary implements encoding.BinaryUnmarshaler
+func (msg *StreamStatus) UnmarshalBinary(b []byte) error {
+	return proto.Unmarshal(b, msg)
+}
+
 // MarshalBinary implements encoding.BinaryMarshaler
 func (msg *PeeringTrustBundle) MarshalBinary() ([]byte, error) {
 	return proto.Marshal(msg)

proto/pbpeering/peering.proto

@@ -183,17 +183,10 @@ message Peering {
   // PeerServerAddresses contains all the the connection addresses for the remote peer.
   repeated string PeerServerAddresses = 10;
 
-  // ImportedServiceCount is the count of how many services are imported from this peering.
+  // StreamStatus contains information computed on read based on the state of the stream.
-  uint64 ImportedServiceCount = 13;
+  //
-
+  // mog: func-to=StreamStatusToAPI func-from=StreamStatusFromAPI
-  // ExportedServiceCount is the count of how many services are exported to this peering.
+  StreamStatus StreamStatus = 13;
-  uint64 ExportedServiceCount = 14;
-
-  // ImportedServices is the list of services imported from this peering.
-  repeated string ImportedServices = 15;
-
-  // ExportedServices is the list of services exported to this peering.
-  repeated string ExportedServices = 16;
 
   // CreateIndex is the Raft index at which the Peering was created.
   // @gotags: bexpr:"-"
@@ -204,6 +197,24 @@ message Peering {
   uint64 ModifyIndex = 12;
 }
 
+// StreamStatus represents information about an active peering stream.
+message StreamStatus {
+  // ImportedServices is the list of services imported from this peering.
+  repeated string ImportedServices = 1;
+
+  // ExportedServices is the list of services exported to this peering.
+  repeated string ExportedServices = 2;
+
+  // LastHeartbeat represents when the last heartbeat message was received.
+  google.protobuf.Timestamp LastHeartbeat = 3;
+
+  // LastReceive represents when any message was last received, regardless of success or error.
+  google.protobuf.Timestamp LastReceive = 4;
+
+  // LastSend represents when any message was last sent, regardless of success or error.
+  google.protobuf.Timestamp LastSend = 5;
+}
+
 // PeeringTrustBundle holds the trust information for validating requests from a peer.
 message PeeringTrustBundle {
   // TrustDomain is the domain for the bundle, example.com, foo.bar.gov for example. Note that this must not have a prefix such as "spiffe://".