-
Notifications
You must be signed in to change notification settings - Fork 2.7k
/
server.go
1239 lines (1091 loc) · 38 KB
/
server.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package datacoord
import (
"context"
"fmt"
"math/rand"
"os"
"sync"
"sync/atomic"
"syscall"
"time"
"github.com/blang/semver/v4"
"github.com/cockroachdb/errors"
"github.com/samber/lo"
"github.com/tikv/client-go/v2/txnkv"
clientv3 "go.etcd.io/etcd/client/v3"
"go.uber.org/zap"
"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
"github.com/milvus-io/milvus/internal/datacoord/broker"
datanodeclient "github.com/milvus-io/milvus/internal/distributed/datanode/client"
indexnodeclient "github.com/milvus-io/milvus/internal/distributed/indexnode/client"
rootcoordclient "github.com/milvus-io/milvus/internal/distributed/rootcoord/client"
"github.com/milvus-io/milvus/internal/kv"
etcdkv "github.com/milvus-io/milvus/internal/kv/etcd"
"github.com/milvus-io/milvus/internal/kv/tikv"
"github.com/milvus-io/milvus/internal/metastore/kv/datacoord"
"github.com/milvus-io/milvus/internal/proto/datapb"
"github.com/milvus-io/milvus/internal/storage"
"github.com/milvus-io/milvus/internal/types"
"github.com/milvus-io/milvus/internal/util/dependency"
"github.com/milvus-io/milvus/internal/util/sessionutil"
"github.com/milvus-io/milvus/pkg/log"
"github.com/milvus-io/milvus/pkg/metrics"
"github.com/milvus-io/milvus/pkg/mq/msgstream"
"github.com/milvus-io/milvus/pkg/mq/msgstream/mqwrapper"
"github.com/milvus-io/milvus/pkg/util"
"github.com/milvus-io/milvus/pkg/util/expr"
"github.com/milvus-io/milvus/pkg/util/logutil"
"github.com/milvus-io/milvus/pkg/util/merr"
"github.com/milvus-io/milvus/pkg/util/metricsinfo"
"github.com/milvus-io/milvus/pkg/util/paramtable"
"github.com/milvus-io/milvus/pkg/util/retry"
"github.com/milvus-io/milvus/pkg/util/timerecord"
"github.com/milvus-io/milvus/pkg/util/typeutil"
)
const (
connMetaMaxRetryTime = 100
allPartitionID = 0 // partitionID means no filtering
)
var (
// TODO: sunby put to config
enableTtChecker = true
ttCheckerName = "dataTtChecker"
ttMaxInterval = 2 * time.Minute
ttCheckerWarnMsg = fmt.Sprintf("Datacoord haven't received tt for %f minutes", ttMaxInterval.Minutes())
segmentTimedFlushDuration = 10.0
)
type (
// UniqueID shortcut for typeutil.UniqueID
UniqueID = typeutil.UniqueID
// Timestamp shortcurt for typeutil.Timestamp
Timestamp = typeutil.Timestamp
)
type dataNodeCreatorFunc func(ctx context.Context, addr string, nodeID int64) (types.DataNodeClient, error)
type indexNodeCreatorFunc func(ctx context.Context, addr string, nodeID int64) (types.IndexNodeClient, error)
type rootCoordCreatorFunc func(ctx context.Context) (types.RootCoordClient, error)
// makes sure Server implements `DataCoord`
var _ types.DataCoord = (*Server)(nil)
var Params = paramtable.Get()
// Server implements `types.DataCoord`
// handles Data Coordinator related jobs
type Server struct {
ctx context.Context
serverLoopCtx context.Context
serverLoopCancel context.CancelFunc
serverLoopWg sync.WaitGroup
quitCh chan struct{}
stateCode atomic.Value
helper ServerHelper
etcdCli *clientv3.Client
tikvCli *txnkv.Client
address string
watchClient kv.WatchKV
kv kv.MetaKv
meta *meta
segmentManager Manager
allocator allocator
cluster Cluster
sessionManager SessionManager
channelManager ChannelManager
rootCoordClient types.RootCoordClient
garbageCollector *garbageCollector
gcOpt GcOption
handler Handler
importMeta ImportMeta
importScheduler ImportScheduler
importChecker ImportChecker
compactionTrigger trigger
compactionHandler compactionPlanContext
compactionViewManager *CompactionViewManager
metricsCacheManager *metricsinfo.MetricsCacheManager
flushCh chan UniqueID
buildIndexCh chan UniqueID
notifyIndexChan chan UniqueID
factory dependency.Factory
session sessionutil.SessionInterface
icSession *sessionutil.Session
dnEventCh <-chan *sessionutil.SessionEvent
inEventCh <-chan *sessionutil.SessionEvent
// qcEventCh <-chan *sessionutil.SessionEvent
qnEventCh <-chan *sessionutil.SessionEvent
enableActiveStandBy bool
activateFunc func() error
dataNodeCreator dataNodeCreatorFunc
indexNodeCreator indexNodeCreatorFunc
rootCoordClientCreator rootCoordCreatorFunc
// indexCoord types.IndexCoord
// segReferManager *SegmentReferenceManager
indexBuilder *indexBuilder
indexNodeManager *IndexNodeManager
indexEngineVersionManager IndexEngineVersionManager
// manage ways that data coord access other coord
broker broker.Broker
}
type CollectionNameInfo struct {
CollectionName string
DBName string
}
// ServerHelper datacoord server injection helper
type ServerHelper struct {
eventAfterHandleDataNodeTt func()
}
func defaultServerHelper() ServerHelper {
return ServerHelper{
eventAfterHandleDataNodeTt: func() {},
}
}
// Option utility function signature to set DataCoord server attributes
type Option func(svr *Server)
// WithRootCoordCreator returns an `Option` setting RootCoord creator with provided parameter
func WithRootCoordCreator(creator rootCoordCreatorFunc) Option {
return func(svr *Server) {
svr.rootCoordClientCreator = creator
}
}
// WithServerHelper returns an `Option` setting ServerHelp with provided parameter
func WithServerHelper(helper ServerHelper) Option {
return func(svr *Server) {
svr.helper = helper
}
}
// WithCluster returns an `Option` setting Cluster with provided parameter
func WithCluster(cluster Cluster) Option {
return func(svr *Server) {
svr.cluster = cluster
}
}
// WithDataNodeCreator returns an `Option` setting DataNode create function
func WithDataNodeCreator(creator dataNodeCreatorFunc) Option {
return func(svr *Server) {
svr.dataNodeCreator = creator
}
}
// WithSegmentManager returns an Option to set SegmentManager
func WithSegmentManager(manager Manager) Option {
return func(svr *Server) {
svr.segmentManager = manager
}
}
// CreateServer creates a `Server` instance
func CreateServer(ctx context.Context, factory dependency.Factory, opts ...Option) *Server {
rand.Seed(time.Now().UnixNano())
s := &Server{
ctx: ctx,
quitCh: make(chan struct{}),
factory: factory,
flushCh: make(chan UniqueID, 1024),
buildIndexCh: make(chan UniqueID, 1024),
notifyIndexChan: make(chan UniqueID),
dataNodeCreator: defaultDataNodeCreatorFunc,
indexNodeCreator: defaultIndexNodeCreatorFunc,
rootCoordClientCreator: defaultRootCoordCreatorFunc,
helper: defaultServerHelper(),
metricsCacheManager: metricsinfo.NewMetricsCacheManager(),
enableActiveStandBy: Params.DataCoordCfg.EnableActiveStandby.GetAsBool(),
}
for _, opt := range opts {
opt(s)
}
expr.Register("datacoord", s)
return s
}
func defaultDataNodeCreatorFunc(ctx context.Context, addr string, nodeID int64) (types.DataNodeClient, error) {
return datanodeclient.NewClient(ctx, addr, nodeID)
}
func defaultIndexNodeCreatorFunc(ctx context.Context, addr string, nodeID int64) (types.IndexNodeClient, error) {
return indexnodeclient.NewClient(ctx, addr, nodeID, Params.DataCoordCfg.WithCredential.GetAsBool())
}
func defaultRootCoordCreatorFunc(ctx context.Context) (types.RootCoordClient, error) {
return rootcoordclient.NewClient(ctx)
}
// QuitSignal returns signal when server quits
func (s *Server) QuitSignal() <-chan struct{} {
return s.quitCh
}
// Register registers data service at etcd
func (s *Server) Register() error {
// first register indexCoord
s.icSession.Register()
s.session.Register()
afterRegister := func() {
metrics.NumNodes.WithLabelValues(fmt.Sprint(paramtable.GetNodeID()), typeutil.DataCoordRole).Inc()
log.Info("DataCoord Register Finished")
s.session.LivenessCheck(s.ctx, func() {
logutil.Logger(s.ctx).Error("disconnected from etcd and exited", zap.Int64("serverID", s.session.GetServerID()))
os.Exit(1)
})
}
if s.enableActiveStandBy {
go func() {
err := s.session.ProcessActiveStandBy(s.activateFunc)
if err != nil {
log.Error("failed to activate standby datacoord server", zap.Error(err))
return
}
err = s.icSession.ForceActiveStandby(nil)
if err != nil {
log.Error("failed to force activate standby indexcoord server", zap.Error(err))
return
}
afterRegister()
}()
} else {
afterRegister()
}
return nil
}
func (s *Server) initSession() error {
s.icSession = sessionutil.NewSession(s.ctx)
if s.icSession == nil {
return errors.New("failed to initialize IndexCoord session")
}
s.icSession.Init(typeutil.IndexCoordRole, s.address, true, true)
s.icSession.SetEnableActiveStandBy(s.enableActiveStandBy)
s.session = sessionutil.NewSession(s.ctx)
if s.session == nil {
return errors.New("failed to initialize session")
}
s.session.Init(typeutil.DataCoordRole, s.address, true, true)
s.session.SetEnableActiveStandBy(s.enableActiveStandBy)
return nil
}
// Init change server state to Initializing
func (s *Server) Init() error {
var err error
s.factory.Init(Params)
if err = s.initSession(); err != nil {
return err
}
if s.enableActiveStandBy {
s.activateFunc = func() error {
log.Info("DataCoord switch from standby to active, activating")
if err := s.initDataCoord(); err != nil {
log.Error("DataCoord init failed", zap.Error(err))
return err
}
s.startDataCoord()
log.Info("DataCoord startup success")
return nil
}
s.stateCode.Store(commonpb.StateCode_StandBy)
log.Info("DataCoord enter standby mode successfully")
return nil
}
return s.initDataCoord()
}
func (s *Server) initDataCoord() error {
s.stateCode.Store(commonpb.StateCode_Initializing)
var err error
if err = s.initRootCoordClient(); err != nil {
return err
}
log.Info("init rootcoord client done")
s.broker = broker.NewCoordinatorBroker(s.rootCoordClient)
s.allocator = newRootCoordAllocator(s.rootCoordClient)
storageCli, err := s.newChunkManagerFactory()
if err != nil {
return err
}
log.Info("init chunk manager factory done")
if err = s.initMeta(storageCli); err != nil {
return err
}
s.handler = newServerHandler(s)
// check whether old node exist, if yes suspend auto balance until all old nodes down
s.updateBalanceConfigLoop(s.ctx)
if err = s.initCluster(); err != nil {
return err
}
log.Info("init datanode cluster done")
s.initIndexNodeManager()
if err = s.initServiceDiscovery(); err != nil {
return err
}
log.Info("init service discovery done")
if Params.DataCoordCfg.EnableCompaction.GetAsBool() {
s.createCompactionHandler()
s.createCompactionTrigger()
log.Info("init compaction scheduler done")
}
if err = s.initSegmentManager(); err != nil {
return err
}
log.Info("init segment manager done")
s.initGarbageCollection(storageCli)
s.initIndexBuilder(storageCli)
s.importMeta, err = NewImportMeta(s.meta.catalog)
if err != nil {
return err
}
s.importScheduler = NewImportScheduler(s.meta, s.cluster, s.allocator, s.importMeta, s.buildIndexCh)
s.importChecker = NewImportChecker(s.meta, s.broker, s.cluster, s.allocator, s.segmentManager, s.importMeta)
s.serverLoopCtx, s.serverLoopCancel = context.WithCancel(s.ctx)
log.Info("init datacoord done", zap.Int64("nodeID", paramtable.GetNodeID()), zap.String("Address", s.address))
return nil
}
// Start initialize `Server` members and start loops, follow steps are taken:
// 1. initialize message factory parameters
// 2. initialize root coord client, meta, datanode cluster, segment info channel,
// allocator, segment manager
// 3. start service discovery and server loops, which includes message stream handler (segment statistics,datanode tt)
// datanodes etcd watch, etcd alive check and flush completed status check
// 4. set server state to Healthy
func (s *Server) Start() error {
if !s.enableActiveStandBy {
s.startDataCoord()
log.Info("DataCoord startup successfully")
}
return nil
}
func (s *Server) startDataCoord() {
if Params.DataCoordCfg.EnableCompaction.GetAsBool() {
s.compactionHandler.start()
s.compactionTrigger.start()
s.compactionViewManager.Start()
}
s.startServerLoop()
// http.Register(&http.Handler{
// Path: "/datacoord/garbage_collection/pause",
// HandlerFunc: func(w http.ResponseWriter, req *http.Request) {
// pauseSeconds := req.URL.Query().Get("pause_seconds")
// seconds, err := strconv.ParseInt(pauseSeconds, 10, 64)
// if err != nil {
// w.WriteHeader(400)
// w.Write([]byte(fmt.Sprintf(`{"msg": "invalid pause seconds(%v)"}`, pauseSeconds)))
// return
// }
// err = s.garbageCollector.Pause(req.Context(), time.Duration(seconds)*time.Second)
// if err != nil {
// w.WriteHeader(500)
// w.Write([]byte(fmt.Sprintf(`{"msg": "failed to pause garbage collection, %s"}`, err.Error())))
// return
// }
// w.WriteHeader(200)
// w.Write([]byte(`{"msg": "OK"}`))
// return
// },
// })
// http.Register(&http.Handler{
// Path: "/datacoord/garbage_collection/resume",
// HandlerFunc: func(w http.ResponseWriter, req *http.Request) {
// err := s.garbageCollector.Resume(req.Context())
// if err != nil {
// w.WriteHeader(500)
// w.Write([]byte(fmt.Sprintf(`{"msg": "failed to pause garbage collection, %s"}`, err.Error())))
// return
// }
// w.WriteHeader(200)
// w.Write([]byte(`{"msg": "OK"}`))
// return
// },
// })
s.afterStart()
s.stateCode.Store(commonpb.StateCode_Healthy)
sessionutil.SaveServerInfo(typeutil.DataCoordRole, s.session.GetServerID())
}
func (s *Server) GetServerID() int64 {
if s.session != nil {
return s.session.GetServerID()
}
return paramtable.GetNodeID()
}
func (s *Server) afterStart() {}
func (s *Server) initCluster() error {
if s.cluster != nil {
return nil
}
s.sessionManager = NewSessionManagerImpl(withSessionCreator(s.dataNodeCreator))
var err error
if paramtable.Get().DataCoordCfg.EnableBalanceChannelWithRPC.GetAsBool() {
s.channelManager, err = NewChannelManagerV2(s.watchClient, s.handler, s.sessionManager, s.allocator, withCheckerV2())
if err != nil {
return err
}
} else {
s.channelManager, err = NewChannelManager(s.watchClient, s.handler, withMsgstreamFactory(s.factory), withStateChecker(), withBgChecker())
if err != nil {
return err
}
}
s.cluster = NewClusterImpl(s.sessionManager, s.channelManager)
return nil
}
func (s *Server) SetAddress(address string) {
s.address = address
}
// SetEtcdClient sets etcd client for datacoord.
func (s *Server) SetEtcdClient(client *clientv3.Client) {
s.etcdCli = client
}
func (s *Server) SetTiKVClient(client *txnkv.Client) {
s.tikvCli = client
}
func (s *Server) SetRootCoordClient(rootCoord types.RootCoordClient) {
s.rootCoordClient = rootCoord
}
func (s *Server) SetDataNodeCreator(f func(context.Context, string, int64) (types.DataNodeClient, error)) {
s.dataNodeCreator = f
}
func (s *Server) SetIndexNodeCreator(f func(context.Context, string, int64) (types.IndexNodeClient, error)) {
s.indexNodeCreator = f
}
func (s *Server) createCompactionHandler() {
s.compactionHandler = newCompactionPlanHandler(s.cluster, s.sessionManager, s.channelManager, s.meta, s.allocator)
triggerv2 := NewCompactionTriggerManager(s.allocator, s.compactionHandler)
s.compactionViewManager = NewCompactionViewManager(s.meta, triggerv2, s.allocator)
}
func (s *Server) stopCompactionHandler() {
s.compactionHandler.stop()
s.compactionViewManager.Close()
}
func (s *Server) createCompactionTrigger() {
s.compactionTrigger = newCompactionTrigger(s.meta, s.compactionHandler, s.allocator, s.handler, s.indexEngineVersionManager)
}
func (s *Server) stopCompactionTrigger() {
s.compactionTrigger.stop()
}
func (s *Server) newChunkManagerFactory() (storage.ChunkManager, error) {
chunkManagerFactory := storage.NewChunkManagerFactoryWithParam(Params)
cli, err := chunkManagerFactory.NewPersistentStorageChunkManager(s.ctx)
if err != nil {
log.Error("chunk manager init failed", zap.Error(err))
return nil, err
}
return cli, err
}
func (s *Server) initGarbageCollection(cli storage.ChunkManager) {
s.garbageCollector = newGarbageCollector(s.meta, s.handler, GcOption{
cli: cli,
enabled: Params.DataCoordCfg.EnableGarbageCollection.GetAsBool(),
checkInterval: Params.DataCoordCfg.GCInterval.GetAsDuration(time.Second),
scanInterval: Params.DataCoordCfg.GCScanIntervalInHour.GetAsDuration(time.Hour),
missingTolerance: Params.DataCoordCfg.GCMissingTolerance.GetAsDuration(time.Second),
dropTolerance: Params.DataCoordCfg.GCDropTolerance.GetAsDuration(time.Second),
})
}
func (s *Server) initServiceDiscovery() error {
r := semver.MustParseRange(">=2.2.3")
sessions, rev, err := s.session.GetSessionsWithVersionRange(typeutil.DataNodeRole, r)
if err != nil {
log.Warn("DataCoord failed to init service discovery", zap.Error(err))
return err
}
log.Info("DataCoord success to get DataNode sessions", zap.Any("sessions", sessions))
datanodes := make([]*NodeInfo, 0, len(sessions))
legacyVersion, err := semver.Parse(paramtable.Get().DataCoordCfg.LegacyVersionWithoutRPCWatch.GetValue())
if err != nil {
log.Warn("DataCoord failed to init service discovery", zap.Error(err))
}
for _, session := range sessions {
info := &NodeInfo{
NodeID: session.ServerID,
Address: session.Address,
}
if session.Version.LTE(legacyVersion) {
info.IsLegacy = true
}
datanodes = append(datanodes, info)
}
log.Info("DataCoord Cluster Manager start up")
if err := s.cluster.Startup(s.ctx, datanodes); err != nil {
log.Warn("DataCoord Cluster Manager failed to start up", zap.Error(err))
return err
}
log.Info("DataCoord Cluster Manager start up successfully")
// TODO implement rewatch logic
s.dnEventCh = s.session.WatchServicesWithVersionRange(typeutil.DataNodeRole, r, rev+1, nil)
inSessions, inRevision, err := s.session.GetSessions(typeutil.IndexNodeRole)
if err != nil {
log.Warn("DataCoord get QueryCoord session failed", zap.Error(err))
return err
}
if Params.DataCoordCfg.BindIndexNodeMode.GetAsBool() {
if err = s.indexNodeManager.AddNode(Params.DataCoordCfg.IndexNodeID.GetAsInt64(), Params.DataCoordCfg.IndexNodeAddress.GetValue()); err != nil {
log.Error("add indexNode fail", zap.Int64("ServerID", Params.DataCoordCfg.IndexNodeID.GetAsInt64()),
zap.String("address", Params.DataCoordCfg.IndexNodeAddress.GetValue()), zap.Error(err))
return err
}
log.Info("add indexNode success", zap.String("IndexNode address", Params.DataCoordCfg.IndexNodeAddress.GetValue()),
zap.Int64("nodeID", Params.DataCoordCfg.IndexNodeID.GetAsInt64()))
} else {
for _, session := range inSessions {
if err := s.indexNodeManager.AddNode(session.ServerID, session.Address); err != nil {
return err
}
}
}
s.inEventCh = s.session.WatchServices(typeutil.IndexNodeRole, inRevision+1, nil)
s.indexEngineVersionManager = newIndexEngineVersionManager()
qnSessions, qnRevision, err := s.session.GetSessions(typeutil.QueryNodeRole)
if err != nil {
log.Warn("DataCoord get QueryNode sessions failed", zap.Error(err))
return err
}
s.indexEngineVersionManager.Startup(qnSessions)
s.qnEventCh = s.session.WatchServicesWithVersionRange(typeutil.QueryNodeRole, r, qnRevision+1, nil)
return nil
}
func (s *Server) initSegmentManager() error {
if s.segmentManager == nil {
manager, err := newSegmentManager(s.meta, s.allocator)
if err != nil {
return err
}
s.segmentManager = manager
}
return nil
}
func (s *Server) initMeta(chunkManager storage.ChunkManager) error {
if s.meta != nil {
return nil
}
s.watchClient = etcdkv.NewEtcdKV(s.etcdCli, Params.EtcdCfg.MetaRootPath.GetValue(),
etcdkv.WithRequestTimeout(paramtable.Get().ServiceParam.EtcdCfg.RequestTimeout.GetAsDuration(time.Millisecond)))
metaType := Params.MetaStoreCfg.MetaStoreType.GetValue()
log.Info("data coordinator connecting to metadata store", zap.String("metaType", metaType))
metaRootPath := ""
if metaType == util.MetaStoreTypeTiKV {
metaRootPath = Params.TiKVCfg.MetaRootPath.GetValue()
s.kv = tikv.NewTiKV(s.tikvCli, metaRootPath,
tikv.WithRequestTimeout(paramtable.Get().ServiceParam.TiKVCfg.RequestTimeout.GetAsDuration(time.Millisecond)))
} else if metaType == util.MetaStoreTypeEtcd {
metaRootPath = Params.EtcdCfg.MetaRootPath.GetValue()
s.kv = etcdkv.NewEtcdKV(s.etcdCli, metaRootPath,
etcdkv.WithRequestTimeout(paramtable.Get().ServiceParam.EtcdCfg.RequestTimeout.GetAsDuration(time.Millisecond)))
} else {
return retry.Unrecoverable(fmt.Errorf("not supported meta store: %s", metaType))
}
log.Info("data coordinator successfully connected to metadata store", zap.String("metaType", metaType))
reloadEtcdFn := func() error {
var err error
catalog := datacoord.NewCatalog(s.kv, chunkManager.RootPath(), metaRootPath)
s.meta, err = newMeta(s.ctx, catalog, chunkManager)
if err != nil {
return err
}
return nil
}
return retry.Do(s.ctx, reloadEtcdFn, retry.Attempts(connMetaMaxRetryTime))
}
func (s *Server) initIndexBuilder(manager storage.ChunkManager) {
if s.indexBuilder == nil {
s.indexBuilder = newIndexBuilder(s.ctx, s.meta, s.indexNodeManager, manager, s.indexEngineVersionManager, s.handler)
}
}
func (s *Server) initIndexNodeManager() {
if s.indexNodeManager == nil {
s.indexNodeManager = NewNodeManager(s.ctx, s.indexNodeCreator)
}
}
func (s *Server) startServerLoop() {
if !Params.DataNodeCfg.DataNodeTimeTickByRPC.GetAsBool() {
s.serverLoopWg.Add(1)
s.startDataNodeTtLoop(s.serverLoopCtx)
}
s.serverLoopWg.Add(2)
s.startWatchService(s.serverLoopCtx)
s.startFlushLoop(s.serverLoopCtx)
s.startIndexService(s.serverLoopCtx)
go s.importScheduler.Start()
go s.importChecker.Start()
s.garbageCollector.start()
}
// startDataNodeTtLoop start a goroutine to recv data node tt msg from msgstream
// tt msg stands for the currently consumed timestamp for each channel
func (s *Server) startDataNodeTtLoop(ctx context.Context) {
ttMsgStream, err := s.factory.NewMsgStream(ctx)
if err != nil {
log.Error("DataCoord failed to create timetick channel", zap.Error(err))
panic(err)
}
timeTickChannel := Params.CommonCfg.DataCoordTimeTick.GetValue()
if Params.CommonCfg.PreCreatedTopicEnabled.GetAsBool() {
timeTickChannel = Params.CommonCfg.TimeTicker.GetValue()
}
subName := fmt.Sprintf("%s-%d-datanodeTl", Params.CommonCfg.DataCoordSubName.GetValue(), paramtable.GetNodeID())
ttMsgStream.AsConsumer(context.TODO(), []string{timeTickChannel}, subName, mqwrapper.SubscriptionPositionLatest)
log.Info("DataCoord creates the timetick channel consumer",
zap.String("timeTickChannel", timeTickChannel),
zap.String("subscription", subName))
go s.handleDataNodeTimetickMsgstream(ctx, ttMsgStream)
}
func (s *Server) handleDataNodeTimetickMsgstream(ctx context.Context, ttMsgStream msgstream.MsgStream) {
var checker *timerecord.LongTermChecker
if enableTtChecker {
checker = timerecord.NewLongTermChecker(ctx, ttCheckerName, ttMaxInterval, ttCheckerWarnMsg)
checker.Start()
defer checker.Stop()
}
defer logutil.LogPanic()
defer s.serverLoopWg.Done()
defer func() {
// https://github.com/milvus-io/milvus/issues/15659
// msgstream service closed before datacoord quits
defer func() {
if x := recover(); x != nil {
log.Error("Failed to close ttMessage", zap.Any("recovered", x))
}
}()
ttMsgStream.Close()
}()
for {
select {
case <-ctx.Done():
log.Info("DataNode timetick loop shutdown")
return
case msgPack, ok := <-ttMsgStream.Chan():
if !ok || msgPack == nil || len(msgPack.Msgs) == 0 {
log.Info("receive nil timetick msg and shutdown timetick channel")
return
}
for _, msg := range msgPack.Msgs {
ttMsg, ok := msg.(*msgstream.DataNodeTtMsg)
if !ok {
log.Warn("receive unexpected msg type from tt channel")
continue
}
if enableTtChecker {
checker.Check()
}
if err := s.handleDataNodeTtMsg(ctx, &ttMsg.DataNodeTtMsg); err != nil {
log.Warn("failed to handle timetick message", zap.Error(err))
continue
}
}
s.helper.eventAfterHandleDataNodeTt()
}
}
}
func (s *Server) updateSegmentStatistics(stats []*commonpb.SegmentStats) {
for _, stat := range stats {
segment := s.meta.GetSegment(stat.GetSegmentID())
if segment == nil {
log.Warn("skip updating row number for not exist segment",
zap.Int64("segmentID", stat.GetSegmentID()),
zap.Int64("new value", stat.GetNumRows()))
continue
}
if isFlushState(segment.GetState()) {
log.Warn("skip updating row number for flushed segment",
zap.Int64("segmentID", stat.GetSegmentID()),
zap.Int64("new value", stat.GetNumRows()))
continue
}
// Log if # of rows is updated.
if segment.currRows < stat.GetNumRows() {
log.Debug("Updating segment number of rows",
zap.Int64("segmentID", stat.GetSegmentID()),
zap.Int64("old value", s.meta.GetSegment(stat.GetSegmentID()).GetNumOfRows()),
zap.Int64("new value", stat.GetNumRows()),
)
s.meta.SetCurrentRows(stat.GetSegmentID(), stat.GetNumRows())
}
}
}
func (s *Server) getFlushableSegmentsInfo(flushableIDs []int64) []*SegmentInfo {
res := make([]*SegmentInfo, 0, len(flushableIDs))
for _, id := range flushableIDs {
sinfo := s.meta.GetHealthySegment(id)
if sinfo == nil {
log.Error("get segment from meta error", zap.Int64("id", id))
continue
}
res = append(res, sinfo)
}
return res
}
func (s *Server) setLastFlushTime(segments []*SegmentInfo) {
for _, sinfo := range segments {
s.meta.SetLastFlushTime(sinfo.GetID(), time.Now())
}
}
// start a goroutine wto watch services
func (s *Server) startWatchService(ctx context.Context) {
go s.watchService(ctx)
}
func (s *Server) stopServiceWatch() {
// ErrCompacted is handled inside SessionWatcher, which means there is some other error occurred, closing server.
logutil.Logger(s.ctx).Error("watch service channel closed", zap.Int64("serverID", paramtable.GetNodeID()))
go s.Stop()
if s.session.IsTriggerKill() {
if p, err := os.FindProcess(os.Getpid()); err == nil {
p.Signal(syscall.SIGINT)
}
}
}
// watchService watches services.
func (s *Server) watchService(ctx context.Context) {
defer logutil.LogPanic()
defer s.serverLoopWg.Done()
for {
select {
case <-ctx.Done():
log.Info("watch service shutdown")
return
case event, ok := <-s.dnEventCh:
if !ok {
s.stopServiceWatch()
return
}
if err := s.handleSessionEvent(ctx, typeutil.DataNodeRole, event); err != nil {
go func() {
if err := s.Stop(); err != nil {
log.Warn("DataCoord server stop error", zap.Error(err))
}
}()
return
}
case event, ok := <-s.inEventCh:
if !ok {
s.stopServiceWatch()
return
}
if err := s.handleSessionEvent(ctx, typeutil.IndexNodeRole, event); err != nil {
go func() {
if err := s.Stop(); err != nil {
log.Warn("DataCoord server stop error", zap.Error(err))
}
}()
return
}
case event, ok := <-s.qnEventCh:
if !ok {
s.stopServiceWatch()
return
}
if err := s.handleSessionEvent(ctx, typeutil.QueryNodeRole, event); err != nil {
go func() {
if err := s.Stop(); err != nil {
log.Warn("DataCoord server stop error", zap.Error(err))
}
}()
return
}
}
}
}
// handles session events - DataNodes Add/Del
func (s *Server) handleSessionEvent(ctx context.Context, role string, event *sessionutil.SessionEvent) error {
if event == nil {
return nil
}
log := log.Ctx(ctx)
switch role {
case typeutil.DataNodeRole:
info := &datapb.DataNodeInfo{
Address: event.Session.Address,
Version: event.Session.ServerID,
Channels: []*datapb.ChannelStatus{},
}
node := &NodeInfo{
NodeID: event.Session.ServerID,
Address: event.Session.Address,
}
switch event.EventType {
case sessionutil.SessionAddEvent:
log.Info("received datanode register",
zap.String("address", info.Address),
zap.Int64("serverID", info.Version))
if err := s.cluster.Register(node); err != nil {
log.Warn("failed to register node", zap.Int64("id", node.NodeID), zap.String("address", node.Address), zap.Error(err))
return err
}
s.metricsCacheManager.InvalidateSystemInfoMetrics()
case sessionutil.SessionDelEvent:
log.Info("received datanode unregister",
zap.String("address", info.Address),
zap.Int64("serverID", info.Version))
if err := s.cluster.UnRegister(node); err != nil {
log.Warn("failed to deregister node", zap.Int64("id", node.NodeID), zap.String("address", node.Address), zap.Error(err))
return err
}
s.metricsCacheManager.InvalidateSystemInfoMetrics()
default:
log.Warn("receive unknown service event type",
zap.Any("type", event.EventType))
}
case typeutil.IndexNodeRole:
if Params.DataCoordCfg.BindIndexNodeMode.GetAsBool() {
log.Info("receive indexnode session event, but adding indexnode by bind mode, skip it",
zap.String("address", event.Session.Address),
zap.Int64("serverID", event.Session.ServerID),
zap.String("event type", event.EventType.String()))
return nil
}
switch event.EventType {
case sessionutil.SessionAddEvent:
log.Info("received indexnode register",
zap.String("address", event.Session.Address),
zap.Int64("serverID", event.Session.ServerID))
return s.indexNodeManager.AddNode(event.Session.ServerID, event.Session.Address)
case sessionutil.SessionDelEvent:
log.Info("received indexnode unregister",
zap.String("address", event.Session.Address),
zap.Int64("serverID", event.Session.ServerID))
s.indexNodeManager.RemoveNode(event.Session.ServerID)
case sessionutil.SessionUpdateEvent:
serverID := event.Session.ServerID
log.Info("received indexnode SessionUpdateEvent", zap.Int64("serverID", serverID))
s.indexNodeManager.StoppingNode(serverID)
default:
log.Warn("receive unknown service event type",
zap.Any("type", event.EventType))
}
case typeutil.QueryNodeRole:
switch event.EventType {
case sessionutil.SessionAddEvent:
log.Info("received querynode register",
zap.String("address", event.Session.Address),
zap.Int64("serverID", event.Session.ServerID))
s.indexEngineVersionManager.AddNode(event.Session)
case sessionutil.SessionDelEvent:
log.Info("received querynode unregister",
zap.String("address", event.Session.Address),
zap.Int64("serverID", event.Session.ServerID))
s.indexEngineVersionManager.RemoveNode(event.Session)
case sessionutil.SessionUpdateEvent:
serverID := event.Session.ServerID
log.Info("received querynode SessionUpdateEvent", zap.Int64("serverID", serverID))
s.indexEngineVersionManager.Update(event.Session)
default:
log.Warn("receive unknown service event type",
zap.Any("type", event.EventType))
}
}
return nil
}
// startFlushLoop starts a goroutine to handle post func process
// which is to notify `RootCoord` that this segment is flushed
func (s *Server) startFlushLoop(ctx context.Context) {
go func() {
defer logutil.LogPanic()
defer s.serverLoopWg.Done()
ctx2, cancel := context.WithCancel(ctx)
defer cancel()
// send `Flushing` segments
go s.handleFlushingSegments(ctx2)