forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
operation_generator.go
1742 lines (1510 loc) · 71.7 KB
/
operation_generator.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
/*
Copyright 2016 The Kubernetes Authors.
Licensed 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 operationexecutor
import (
goerrors "errors"
"fmt"
"path"
"strings"
"time"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
utilfeature "k8s.io/apiserver/pkg/util/feature"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/record"
volerr "k8s.io/cloud-provider/volume/errors"
csilib "k8s.io/csi-translation-lib"
"k8s.io/klog"
expandcache "k8s.io/kubernetes/pkg/controller/volume/expand/cache"
"k8s.io/kubernetes/pkg/features"
kevents "k8s.io/kubernetes/pkg/kubelet/events"
"k8s.io/kubernetes/pkg/util/mount"
"k8s.io/kubernetes/pkg/volume"
"k8s.io/kubernetes/pkg/volume/csi"
"k8s.io/kubernetes/pkg/volume/util"
volumetypes "k8s.io/kubernetes/pkg/volume/util/types"
"k8s.io/kubernetes/pkg/volume/util/volumepathhandler"
)
const (
unknownVolumePlugin string = "UnknownVolumePlugin"
)
var _ OperationGenerator = &operationGenerator{}
type operationGenerator struct {
// Used to fetch objects from the API server like Node in the
// VerifyControllerAttachedVolume operation.
kubeClient clientset.Interface
// volumePluginMgr is the volume plugin manager used to create volume
// plugin objects.
volumePluginMgr *volume.VolumePluginMgr
// recorder is used to record events in the API server
recorder record.EventRecorder
// checkNodeCapabilitiesBeforeMount, if set, enables the CanMount check,
// which verifies that the components (binaries, etc.) required to mount
// the volume are available on the underlying node before attempting mount.
checkNodeCapabilitiesBeforeMount bool
// blkUtil provides volume path related operations for block volume
blkUtil volumepathhandler.BlockVolumePathHandler
}
// NewOperationGenerator is returns instance of operationGenerator
func NewOperationGenerator(kubeClient clientset.Interface,
volumePluginMgr *volume.VolumePluginMgr,
recorder record.EventRecorder,
checkNodeCapabilitiesBeforeMount bool,
blkUtil volumepathhandler.BlockVolumePathHandler) OperationGenerator {
return &operationGenerator{
kubeClient: kubeClient,
volumePluginMgr: volumePluginMgr,
recorder: recorder,
checkNodeCapabilitiesBeforeMount: checkNodeCapabilitiesBeforeMount,
blkUtil: blkUtil,
}
}
// OperationGenerator interface that extracts out the functions from operation_executor to make it dependency injectable
type OperationGenerator interface {
// Generates the MountVolume function needed to perform the mount of a volume plugin
GenerateMountVolumeFunc(waitForAttachTimeout time.Duration, volumeToMount VolumeToMount, actualStateOfWorldMounterUpdater ActualStateOfWorldMounterUpdater, isRemount bool) volumetypes.GeneratedOperations
// Generates the UnmountVolume function needed to perform the unmount of a volume plugin
GenerateUnmountVolumeFunc(volumeToUnmount MountedVolume, actualStateOfWorld ActualStateOfWorldMounterUpdater, podsDir string) (volumetypes.GeneratedOperations, error)
// Generates the AttachVolume function needed to perform attach of a volume plugin
GenerateAttachVolumeFunc(volumeToAttach VolumeToAttach, actualStateOfWorld ActualStateOfWorldAttacherUpdater) (volumetypes.GeneratedOperations, error)
// Generates the DetachVolume function needed to perform the detach of a volume plugin
GenerateDetachVolumeFunc(volumeToDetach AttachedVolume, verifySafeToDetach bool, actualStateOfWorld ActualStateOfWorldAttacherUpdater) (volumetypes.GeneratedOperations, error)
// Generates the VolumesAreAttached function needed to verify if volume plugins are attached
GenerateVolumesAreAttachedFunc(attachedVolumes []AttachedVolume, nodeName types.NodeName, actualStateOfWorld ActualStateOfWorldAttacherUpdater) (volumetypes.GeneratedOperations, error)
// Generates the UnMountDevice function needed to perform the unmount of a device
GenerateUnmountDeviceFunc(deviceToDetach AttachedVolume, actualStateOfWorld ActualStateOfWorldMounterUpdater, mounter mount.Interface) (volumetypes.GeneratedOperations, error)
// Generates the function needed to check if the attach_detach controller has attached the volume plugin
GenerateVerifyControllerAttachedVolumeFunc(volumeToMount VolumeToMount, nodeName types.NodeName, actualStateOfWorld ActualStateOfWorldAttacherUpdater) (volumetypes.GeneratedOperations, error)
// Generates the MapVolume function needed to perform the map of a volume plugin
GenerateMapVolumeFunc(waitForAttachTimeout time.Duration, volumeToMount VolumeToMount, actualStateOfWorldMounterUpdater ActualStateOfWorldMounterUpdater) (volumetypes.GeneratedOperations, error)
// Generates the UnmapVolume function needed to perform the unmap of a volume plugin
GenerateUnmapVolumeFunc(volumeToUnmount MountedVolume, actualStateOfWorld ActualStateOfWorldMounterUpdater) (volumetypes.GeneratedOperations, error)
// Generates the UnmapDevice function needed to perform the unmap of a device
GenerateUnmapDeviceFunc(deviceToDetach AttachedVolume, actualStateOfWorld ActualStateOfWorldMounterUpdater, mounter mount.Interface) (volumetypes.GeneratedOperations, error)
// GetVolumePluginMgr returns volume plugin manager
GetVolumePluginMgr() *volume.VolumePluginMgr
GenerateBulkVolumeVerifyFunc(
map[types.NodeName][]*volume.Spec,
string,
map[*volume.Spec]v1.UniqueVolumeName, ActualStateOfWorldAttacherUpdater) (volumetypes.GeneratedOperations, error)
GenerateExpandVolumeFunc(*expandcache.PVCWithResizeRequest, expandcache.VolumeResizeMap) (volumetypes.GeneratedOperations, error)
// Generates the volume file system resize function, which can resize volume's file system to expected size without unmounting the volume.
GenerateExpandVolumeFSWithoutUnmountingFunc(volumeToMount VolumeToMount, actualStateOfWorld ActualStateOfWorldMounterUpdater) (volumetypes.GeneratedOperations, error)
}
func (og *operationGenerator) GenerateVolumesAreAttachedFunc(
attachedVolumes []AttachedVolume,
nodeName types.NodeName,
actualStateOfWorld ActualStateOfWorldAttacherUpdater) (volumetypes.GeneratedOperations, error) {
// volumesPerPlugin maps from a volume plugin to a list of volume specs which belong
// to this type of plugin
volumesPerPlugin := make(map[string][]*volume.Spec)
// volumeSpecMap maps from a volume spec to its unique volumeName which will be used
// when calling MarkVolumeAsDetached
volumeSpecMap := make(map[*volume.Spec]v1.UniqueVolumeName)
// Iterate each volume spec and put them into a map index by the pluginName
for _, volumeAttached := range attachedVolumes {
if volumeAttached.VolumeSpec == nil {
klog.Errorf("VerifyVolumesAreAttached.GenerateVolumesAreAttachedFunc: nil spec for volume %s", volumeAttached.VolumeName)
continue
}
volumePlugin, err :=
og.volumePluginMgr.FindPluginBySpec(volumeAttached.VolumeSpec)
if err != nil || volumePlugin == nil {
klog.Errorf(volumeAttached.GenerateErrorDetailed("VolumesAreAttached.FindPluginBySpec failed", err).Error())
continue
}
volumeSpecList, pluginExists := volumesPerPlugin[volumePlugin.GetPluginName()]
if !pluginExists {
volumeSpecList = []*volume.Spec{}
}
volumeSpecList = append(volumeSpecList, volumeAttached.VolumeSpec)
volumesPerPlugin[volumePlugin.GetPluginName()] = volumeSpecList
volumeSpecMap[volumeAttached.VolumeSpec] = volumeAttached.VolumeName
}
volumesAreAttachedFunc := func() (error, error) {
// For each volume plugin, pass the list of volume specs to VolumesAreAttached to check
// whether the volumes are still attached.
for pluginName, volumesSpecs := range volumesPerPlugin {
attachableVolumePlugin, err :=
og.volumePluginMgr.FindAttachablePluginByName(pluginName)
if err != nil || attachableVolumePlugin == nil {
klog.Errorf(
"VolumeAreAttached.FindAttachablePluginBySpec failed for plugin %q with: %v",
pluginName,
err)
continue
}
volumeAttacher, newAttacherErr := attachableVolumePlugin.NewAttacher()
if newAttacherErr != nil {
klog.Errorf(
"VolumesAreAttached.NewAttacher failed for getting plugin %q with: %v",
pluginName,
newAttacherErr)
continue
}
attached, areAttachedErr := volumeAttacher.VolumesAreAttached(volumesSpecs, nodeName)
if areAttachedErr != nil {
klog.Errorf(
"VolumesAreAttached failed for checking on node %q with: %v",
nodeName,
areAttachedErr)
continue
}
for spec, check := range attached {
if !check {
actualStateOfWorld.MarkVolumeAsDetached(volumeSpecMap[spec], nodeName)
klog.V(1).Infof("VerifyVolumesAreAttached determined volume %q (spec.Name: %q) is no longer attached to node %q, therefore it was marked as detached.",
volumeSpecMap[spec], spec.Name(), nodeName)
}
}
}
return nil, nil
}
return volumetypes.GeneratedOperations{
OperationFunc: volumesAreAttachedFunc,
CompleteFunc: util.OperationCompleteHook(util.GetFullQualifiedPluginNameForVolume("<n/a>", nil), "verify_volumes_are_attached_per_node"),
EventRecorderFunc: nil, // nil because we do not want to generate event on error
}, nil
}
func (og *operationGenerator) GenerateBulkVolumeVerifyFunc(
pluginNodeVolumes map[types.NodeName][]*volume.Spec,
pluginName string,
volumeSpecMap map[*volume.Spec]v1.UniqueVolumeName,
actualStateOfWorld ActualStateOfWorldAttacherUpdater) (volumetypes.GeneratedOperations, error) {
bulkVolumeVerifyFunc := func() (error, error) {
attachableVolumePlugin, err :=
og.volumePluginMgr.FindAttachablePluginByName(pluginName)
if err != nil || attachableVolumePlugin == nil {
klog.Errorf(
"BulkVerifyVolume.FindAttachablePluginBySpec failed for plugin %q with: %v",
pluginName,
err)
return nil, nil
}
volumeAttacher, newAttacherErr := attachableVolumePlugin.NewAttacher()
if newAttacherErr != nil {
klog.Errorf(
"BulkVerifyVolume.NewAttacher failed for getting plugin %q with: %v",
attachableVolumePlugin,
newAttacherErr)
return nil, nil
}
bulkVolumeVerifier, ok := volumeAttacher.(volume.BulkVolumeVerifier)
if !ok {
klog.Errorf("BulkVerifyVolume failed to type assert attacher %q", bulkVolumeVerifier)
return nil, nil
}
attached, bulkAttachErr := bulkVolumeVerifier.BulkVerifyVolumes(pluginNodeVolumes)
if bulkAttachErr != nil {
klog.Errorf("BulkVerifyVolume.BulkVerifyVolumes Error checking volumes are attached with %v", bulkAttachErr)
return nil, nil
}
for nodeName, volumeSpecs := range pluginNodeVolumes {
for _, volumeSpec := range volumeSpecs {
nodeVolumeSpecs, nodeChecked := attached[nodeName]
if !nodeChecked {
klog.V(2).Infof("VerifyVolumesAreAttached.BulkVerifyVolumes failed for node %q and leaving volume %q as attached",
nodeName,
volumeSpec.Name())
continue
}
check := nodeVolumeSpecs[volumeSpec]
if !check {
klog.V(2).Infof("VerifyVolumesAreAttached.BulkVerifyVolumes failed for node %q and volume %q",
nodeName,
volumeSpec.Name())
actualStateOfWorld.MarkVolumeAsDetached(volumeSpecMap[volumeSpec], nodeName)
}
}
}
return nil, nil
}
return volumetypes.GeneratedOperations{
OperationFunc: bulkVolumeVerifyFunc,
CompleteFunc: util.OperationCompleteHook(util.GetFullQualifiedPluginNameForVolume(pluginName, nil), "verify_volumes_are_attached"),
EventRecorderFunc: nil, // nil because we do not want to generate event on error
}, nil
}
func (og *operationGenerator) GenerateAttachVolumeFunc(
volumeToAttach VolumeToAttach,
actualStateOfWorld ActualStateOfWorldAttacherUpdater) (volumetypes.GeneratedOperations, error) {
var err error
var attachableVolumePlugin volume.AttachableVolumePlugin
// Get attacher plugin
eventRecorderFunc := func(err *error) {
if *err != nil {
for _, pod := range volumeToAttach.ScheduledPods {
og.recorder.Eventf(pod, v1.EventTypeWarning, kevents.FailedAttachVolume, (*err).Error())
}
}
}
originalSpec := volumeToAttach.VolumeSpec
nu, err := nodeUsingCSIPlugin(og, volumeToAttach.VolumeSpec, volumeToAttach.NodeName)
if err != nil {
eventRecorderFunc(&err)
return volumetypes.GeneratedOperations{}, volumeToAttach.GenerateErrorDetailed("AttachVolume.NodeUsingCSIPlugin failed", err)
}
// useCSIPlugin will check both CSIMigration and the plugin specific feature gate
if useCSIPlugin(og.volumePluginMgr, volumeToAttach.VolumeSpec) && nu {
// The volume represented by this spec is CSI and thus should be migrated
attachableVolumePlugin, err = og.volumePluginMgr.FindAttachablePluginByName(csi.CSIPluginName)
if err != nil || attachableVolumePlugin == nil {
eventRecorderFunc(&err)
return volumetypes.GeneratedOperations{}, volumeToAttach.GenerateErrorDetailed("AttachVolume.FindAttachablePluginByName failed", err)
}
csiSpec, err := translateSpec(volumeToAttach.VolumeSpec)
if err != nil {
return volumetypes.GeneratedOperations{}, volumeToAttach.GenerateErrorDetailed("AttachVolume.TranslateSpec failed", err)
}
volumeToAttach.VolumeSpec = csiSpec
} else {
attachableVolumePlugin, err =
og.volumePluginMgr.FindAttachablePluginBySpec(volumeToAttach.VolumeSpec)
if err != nil || attachableVolumePlugin == nil {
eventRecorderFunc(&err)
return volumetypes.GeneratedOperations{}, volumeToAttach.GenerateErrorDetailed("AttachVolume.FindAttachablePluginBySpec failed", err)
}
}
volumeAttacher, newAttacherErr := attachableVolumePlugin.NewAttacher()
if newAttacherErr != nil {
eventRecorderFunc(&err)
return volumetypes.GeneratedOperations{}, volumeToAttach.GenerateErrorDetailed("AttachVolume.NewAttacher failed", newAttacherErr)
}
attachVolumeFunc := func() (error, error) {
// Execute attach
devicePath, attachErr := volumeAttacher.Attach(
volumeToAttach.VolumeSpec, volumeToAttach.NodeName)
if attachErr != nil {
if derr, ok := attachErr.(*volerr.DanglingAttachError); ok {
addErr := actualStateOfWorld.MarkVolumeAsAttached(
v1.UniqueVolumeName(""),
originalSpec,
derr.CurrentNode,
derr.DevicePath)
if addErr != nil {
klog.Errorf("AttachVolume.MarkVolumeAsAttached failed to fix dangling volume error for volume %q with %s", volumeToAttach.VolumeName, addErr)
}
} else {
addErr := actualStateOfWorld.MarkVolumeAsUncertain(
v1.UniqueVolumeName(""), originalSpec, volumeToAttach.NodeName)
if addErr != nil {
klog.Errorf("AttachVolume.MarkVolumeAsUncertain fail to add the volume %q to actual state with %s", volumeToAttach.VolumeName, addErr)
}
}
// On failure, return error. Caller will log and retry.
return volumeToAttach.GenerateError("AttachVolume.Attach failed", attachErr)
}
// Successful attach event is useful for user debugging
simpleMsg, _ := volumeToAttach.GenerateMsg("AttachVolume.Attach succeeded", "")
for _, pod := range volumeToAttach.ScheduledPods {
og.recorder.Eventf(pod, v1.EventTypeNormal, kevents.SuccessfulAttachVolume, simpleMsg)
}
klog.Infof(volumeToAttach.GenerateMsgDetailed("AttachVolume.Attach succeeded", ""))
// Update actual state of world
addVolumeNodeErr := actualStateOfWorld.MarkVolumeAsAttached(
v1.UniqueVolumeName(""), originalSpec, volumeToAttach.NodeName, devicePath)
if addVolumeNodeErr != nil {
// On failure, return error. Caller will log and retry.
return volumeToAttach.GenerateError("AttachVolume.MarkVolumeAsAttached failed", addVolumeNodeErr)
}
return nil, nil
}
return volumetypes.GeneratedOperations{
OperationFunc: attachVolumeFunc,
EventRecorderFunc: eventRecorderFunc,
CompleteFunc: util.OperationCompleteHook(util.GetFullQualifiedPluginNameForVolume(attachableVolumePlugin.GetPluginName(), volumeToAttach.VolumeSpec), "volume_attach"),
}, nil
}
func (og *operationGenerator) GetVolumePluginMgr() *volume.VolumePluginMgr {
return og.volumePluginMgr
}
func (og *operationGenerator) GenerateDetachVolumeFunc(
volumeToDetach AttachedVolume,
verifySafeToDetach bool,
actualStateOfWorld ActualStateOfWorldAttacherUpdater) (volumetypes.GeneratedOperations, error) {
var volumeName string
var attachableVolumePlugin volume.AttachableVolumePlugin
var pluginName string
var err error
if volumeToDetach.VolumeSpec != nil {
// Get attacher plugin
nu, err := nodeUsingCSIPlugin(og, volumeToDetach.VolumeSpec, volumeToDetach.NodeName)
if err != nil {
return volumetypes.GeneratedOperations{}, volumeToDetach.GenerateErrorDetailed("DetachVolume.NodeUsingCSIPlugin failed", err)
}
// useCSIPlugin will check both CSIMigration and the plugin specific feature gate
if useCSIPlugin(og.volumePluginMgr, volumeToDetach.VolumeSpec) && nu {
// The volume represented by this spec is CSI and thus should be migrated
attachableVolumePlugin, err = og.volumePluginMgr.FindAttachablePluginByName(csi.CSIPluginName)
if err != nil || attachableVolumePlugin == nil {
return volumetypes.GeneratedOperations{}, volumeToDetach.GenerateErrorDetailed("DetachVolume.FindAttachablePluginBySpec failed", err)
}
csiSpec, err := translateSpec(volumeToDetach.VolumeSpec)
if err != nil {
return volumetypes.GeneratedOperations{}, volumeToDetach.GenerateErrorDetailed("DetachVolume.TranslateSpec failed", err)
}
volumeToDetach.VolumeSpec = csiSpec
} else {
attachableVolumePlugin, err =
og.volumePluginMgr.FindAttachablePluginBySpec(volumeToDetach.VolumeSpec)
if err != nil || attachableVolumePlugin == nil {
return volumetypes.GeneratedOperations{}, volumeToDetach.GenerateErrorDetailed("DetachVolume.FindAttachablePluginBySpec failed", err)
}
}
volumeName, err =
attachableVolumePlugin.GetVolumeName(volumeToDetach.VolumeSpec)
if err != nil {
return volumetypes.GeneratedOperations{}, volumeToDetach.GenerateErrorDetailed("DetachVolume.GetVolumeName failed", err)
}
} else {
// Get attacher plugin and the volumeName by splitting the volume unique name in case
// there's no VolumeSpec: this happens only on attach/detach controller crash recovery
// when a pod has been deleted during the controller downtime
pluginName, volumeName, err = util.SplitUniqueName(volumeToDetach.VolumeName)
if err != nil {
return volumetypes.GeneratedOperations{}, volumeToDetach.GenerateErrorDetailed("DetachVolume.SplitUniqueName failed", err)
}
// TODO(dyzz): This case can't distinguish between PV and In-line which is necessary because
// if it was PV it may have been migrated, but the same plugin with in-line may not have been.
// Suggestions welcome...
if csilib.IsMigratableIntreePluginByName(pluginName) && utilfeature.DefaultFeatureGate.Enabled(features.CSIMigration) {
// The volume represented by this spec is CSI and thus should be migrated
attachableVolumePlugin, err = og.volumePluginMgr.FindAttachablePluginByName(csi.CSIPluginName)
if err != nil || attachableVolumePlugin == nil {
return volumetypes.GeneratedOperations{}, volumeToDetach.GenerateErrorDetailed("AttachVolume.FindAttachablePluginBySpec failed", err)
}
// volumeToDetach.VolumeName here is always the in-tree volume name
// therefore a workaround is required. volumeToDetach.DevicePath
// is the attachID which happens to be what volumeName is needed for in Detach.
// Therefore we set volumeName to the attachID. And CSI Detach can detect and use that.
volumeName = volumeToDetach.DevicePath
} else {
attachableVolumePlugin, err = og.volumePluginMgr.FindAttachablePluginByName(pluginName)
if err != nil || attachableVolumePlugin == nil {
return volumetypes.GeneratedOperations{}, volumeToDetach.GenerateErrorDetailed("DetachVolume.FindAttachablePluginByName failed", err)
}
}
}
if pluginName == "" {
pluginName = attachableVolumePlugin.GetPluginName()
}
volumeDetacher, err := attachableVolumePlugin.NewDetacher()
if err != nil {
return volumetypes.GeneratedOperations{}, volumeToDetach.GenerateErrorDetailed("DetachVolume.NewDetacher failed", err)
}
getVolumePluginMgrFunc := func() (error, error) {
var err error
if verifySafeToDetach {
err = og.verifyVolumeIsSafeToDetach(volumeToDetach)
}
if err == nil {
err = volumeDetacher.Detach(volumeName, volumeToDetach.NodeName)
}
if err != nil {
// On failure, add volume back to ReportAsAttached list
actualStateOfWorld.AddVolumeToReportAsAttached(
volumeToDetach.VolumeName, volumeToDetach.NodeName)
return volumeToDetach.GenerateError("DetachVolume.Detach failed", err)
}
klog.Infof(volumeToDetach.GenerateMsgDetailed("DetachVolume.Detach succeeded", ""))
// Update actual state of world
actualStateOfWorld.MarkVolumeAsDetached(
volumeToDetach.VolumeName, volumeToDetach.NodeName)
return nil, nil
}
return volumetypes.GeneratedOperations{
OperationFunc: getVolumePluginMgrFunc,
CompleteFunc: util.OperationCompleteHook(util.GetFullQualifiedPluginNameForVolume(pluginName, volumeToDetach.VolumeSpec), "volume_detach"),
EventRecorderFunc: nil, // nil because we do not want to generate event on error
}, nil
}
func (og *operationGenerator) GenerateMountVolumeFunc(
waitForAttachTimeout time.Duration,
volumeToMount VolumeToMount,
actualStateOfWorld ActualStateOfWorldMounterUpdater,
isRemount bool) volumetypes.GeneratedOperations {
// Get mounter plugin
volumePluginName := unknownVolumePlugin
volumePlugin, err :=
og.volumePluginMgr.FindPluginBySpec(volumeToMount.VolumeSpec)
if err == nil && volumePlugin != nil {
volumePluginName = volumePlugin.GetPluginName()
}
mountVolumeFunc := func() (error, error) {
originalSpec := volumeToMount.VolumeSpec
// Get mounter plugin
if useCSIPlugin(og.volumePluginMgr, volumeToMount.VolumeSpec) {
csiSpec, err := translateSpec(volumeToMount.VolumeSpec)
if err != nil {
return volumeToMount.GenerateError("MountVolume.TranslateSpec failed", err)
}
volumeToMount.VolumeSpec = csiSpec
}
volumePlugin, err := og.volumePluginMgr.FindPluginBySpec(volumeToMount.VolumeSpec)
if err != nil || volumePlugin == nil {
return volumeToMount.GenerateError("MountVolume.FindPluginBySpec failed", err)
}
affinityErr := checkNodeAffinity(og, volumeToMount, volumePlugin)
if affinityErr != nil {
return volumeToMount.GenerateError("MountVolume.NodeAffinity check failed", affinityErr)
}
volumeMounter, newMounterErr := volumePlugin.NewMounter(
volumeToMount.VolumeSpec,
volumeToMount.Pod,
volume.VolumeOptions{})
if newMounterErr != nil {
return volumeToMount.GenerateError("MountVolume.NewMounter initialization failed", newMounterErr)
}
mountCheckError := checkMountOptionSupport(og, volumeToMount, volumePlugin)
if mountCheckError != nil {
return volumeToMount.GenerateError("MountVolume.MountOptionSupport check failed", mountCheckError)
}
// Get attacher, if possible
attachableVolumePlugin, _ :=
og.volumePluginMgr.FindAttachablePluginBySpec(volumeToMount.VolumeSpec)
var volumeAttacher volume.Attacher
if attachableVolumePlugin != nil {
volumeAttacher, _ = attachableVolumePlugin.NewAttacher()
}
// get deviceMounter, if possible
deviceMountableVolumePlugin, _ := og.volumePluginMgr.FindDeviceMountablePluginBySpec(volumeToMount.VolumeSpec)
var volumeDeviceMounter volume.DeviceMounter
if deviceMountableVolumePlugin != nil {
volumeDeviceMounter, _ = deviceMountableVolumePlugin.NewDeviceMounter()
}
var fsGroup *int64
if volumeToMount.Pod.Spec.SecurityContext != nil &&
volumeToMount.Pod.Spec.SecurityContext.FSGroup != nil {
fsGroup = volumeToMount.Pod.Spec.SecurityContext.FSGroup
}
devicePath := volumeToMount.DevicePath
if volumeAttacher != nil {
// Wait for attachable volumes to finish attaching
klog.Infof(volumeToMount.GenerateMsgDetailed("MountVolume.WaitForAttach entering", fmt.Sprintf("DevicePath %q", volumeToMount.DevicePath)))
devicePath, err = volumeAttacher.WaitForAttach(
volumeToMount.VolumeSpec, devicePath, volumeToMount.Pod, waitForAttachTimeout)
if err != nil {
// On failure, return error. Caller will log and retry.
return volumeToMount.GenerateError("MountVolume.WaitForAttach failed", err)
}
klog.Infof(volumeToMount.GenerateMsgDetailed("MountVolume.WaitForAttach succeeded", fmt.Sprintf("DevicePath %q", devicePath)))
}
var resizeDone bool
var resizeError error
resizeOptions := volume.NodeResizeOptions{
DevicePath: devicePath,
}
if volumeDeviceMounter != nil {
deviceMountPath, err :=
volumeDeviceMounter.GetDeviceMountPath(volumeToMount.VolumeSpec)
if err != nil {
// On failure, return error. Caller will log and retry.
return volumeToMount.GenerateError("MountVolume.GetDeviceMountPath failed", err)
}
// Mount device to global mount path
err = volumeDeviceMounter.MountDevice(
volumeToMount.VolumeSpec,
devicePath,
deviceMountPath)
if err != nil {
// On failure, return error. Caller will log and retry.
return volumeToMount.GenerateError("MountVolume.MountDevice failed", err)
}
klog.Infof(volumeToMount.GenerateMsgDetailed("MountVolume.MountDevice succeeded", fmt.Sprintf("device mount path %q", deviceMountPath)))
// Update actual state of world to reflect volume is globally mounted
markDeviceMountedErr := actualStateOfWorld.MarkDeviceAsMounted(
volumeToMount.VolumeName, devicePath, deviceMountPath)
if markDeviceMountedErr != nil {
// On failure, return error. Caller will log and retry.
return volumeToMount.GenerateError("MountVolume.MarkDeviceAsMounted failed", markDeviceMountedErr)
}
resizeOptions.DeviceMountPath = deviceMountPath
resizeOptions.CSIVolumePhase = volume.CSIVolumeStaged
// resizeFileSystem will resize the file system if user has requested a resize of
// underlying persistent volume and is allowed to do so.
resizeDone, resizeError = og.resizeFileSystem(volumeToMount, resizeOptions, volumePluginName)
if resizeError != nil {
klog.Errorf("MountVolume.resizeFileSystem failed with %v", resizeError)
return volumeToMount.GenerateError("MountVolume.MountDevice failed while expanding volume", resizeError)
}
}
if og.checkNodeCapabilitiesBeforeMount {
if canMountErr := volumeMounter.CanMount(); canMountErr != nil {
err = fmt.Errorf(
"Verify that your node machine has the required components before attempting to mount this volume type. %s",
canMountErr)
return volumeToMount.GenerateError("MountVolume.CanMount failed", err)
}
}
// Execute mount
mountErr := volumeMounter.SetUp(fsGroup)
if mountErr != nil {
// On failure, return error. Caller will log and retry.
return volumeToMount.GenerateError("MountVolume.SetUp failed", mountErr)
}
_, detailedMsg := volumeToMount.GenerateMsg("MountVolume.SetUp succeeded", "")
verbosity := klog.Level(1)
if isRemount {
verbosity = klog.Level(4)
}
klog.V(verbosity).Infof(detailedMsg)
resizeOptions.DeviceMountPath = volumeMounter.GetPath()
resizeOptions.CSIVolumePhase = volume.CSIVolumePublished
// We need to call resizing here again in case resizing was not done during device mount. There could be
// two reasons of that:
// - Volume does not support DeviceMounter interface.
// - In case of CSI the volume does not have node stage_unstage capability.
if !resizeDone {
resizeDone, resizeError = og.resizeFileSystem(volumeToMount, resizeOptions, volumePluginName)
if resizeError != nil {
klog.Errorf("MountVolume.resizeFileSystem failed with %v", resizeError)
return volumeToMount.GenerateError("MountVolume.Setup failed while expanding volume", resizeError)
}
}
// Update actual state of world
markVolMountedErr := actualStateOfWorld.MarkVolumeAsMounted(
volumeToMount.PodName,
volumeToMount.Pod.UID,
volumeToMount.VolumeName,
volumeMounter,
nil,
volumeToMount.OuterVolumeSpecName,
volumeToMount.VolumeGidValue,
originalSpec)
if markVolMountedErr != nil {
// On failure, return error. Caller will log and retry.
return volumeToMount.GenerateError("MountVolume.MarkVolumeAsMounted failed", markVolMountedErr)
}
return nil, nil
}
eventRecorderFunc := func(err *error) {
if *err != nil {
og.recorder.Eventf(volumeToMount.Pod, v1.EventTypeWarning, kevents.FailedMountVolume, (*err).Error())
}
}
return volumetypes.GeneratedOperations{
OperationFunc: mountVolumeFunc,
EventRecorderFunc: eventRecorderFunc,
CompleteFunc: util.OperationCompleteHook(util.GetFullQualifiedPluginNameForVolume(volumePluginName, volumeToMount.VolumeSpec), "volume_mount"),
}
}
func (og *operationGenerator) resizeFileSystem(volumeToMount VolumeToMount, rsOpts volume.NodeResizeOptions, pluginName string) (bool, error) {
if !utilfeature.DefaultFeatureGate.Enabled(features.ExpandPersistentVolumes) {
klog.V(4).Infof("Resizing is not enabled for this volume %s", volumeToMount.VolumeName)
return true, nil
}
// Get expander, if possible
expandableVolumePlugin, _ :=
og.volumePluginMgr.FindNodeExpandablePluginBySpec(volumeToMount.VolumeSpec)
if expandableVolumePlugin != nil &&
expandableVolumePlugin.RequiresFSResize() &&
volumeToMount.VolumeSpec.PersistentVolume != nil {
pv := volumeToMount.VolumeSpec.PersistentVolume
pvc, err := og.kubeClient.CoreV1().PersistentVolumeClaims(pv.Spec.ClaimRef.Namespace).Get(pv.Spec.ClaimRef.Name, metav1.GetOptions{})
if err != nil {
// Return error rather than leave the file system un-resized, caller will log and retry
return false, fmt.Errorf("MountVolume.resizeFileSystem get PVC failed : %v", err)
}
pvcStatusCap := pvc.Status.Capacity[v1.ResourceStorage]
pvSpecCap := pv.Spec.Capacity[v1.ResourceStorage]
if pvcStatusCap.Cmp(pvSpecCap) < 0 {
// File system resize was requested, proceed
klog.V(4).Infof(volumeToMount.GenerateMsgDetailed("MountVolume.resizeFileSystem entering", fmt.Sprintf("DevicePath %q", volumeToMount.DevicePath)))
if volumeToMount.VolumeSpec.ReadOnly {
simpleMsg, detailedMsg := volumeToMount.GenerateMsg("MountVolume.resizeFileSystem failed", "requested read-only file system")
klog.Warningf(detailedMsg)
og.recorder.Eventf(volumeToMount.Pod, v1.EventTypeWarning, kevents.FileSystemResizeFailed, simpleMsg)
return true, nil
}
rsOpts.VolumeSpec = volumeToMount.VolumeSpec
rsOpts.NewSize = pvSpecCap
rsOpts.OldSize = pvcStatusCap
resizeDone, resizeErr := expandableVolumePlugin.NodeExpand(rsOpts)
if resizeErr != nil {
return false, fmt.Errorf("MountVolume.resizeFileSystem failed : %v", resizeErr)
}
// Volume resizing is not done but it did not error out. This could happen if a CSI volume
// does not have node stage_unstage capability but was asked to resize the volume before
// node publish. In which case - we must retry resizing after node publish.
if !resizeDone {
return false, nil
}
simpleMsg, detailedMsg := volumeToMount.GenerateMsg("MountVolume.resizeFileSystem succeeded", "")
og.recorder.Eventf(volumeToMount.Pod, v1.EventTypeNormal, kevents.FileSystemResizeSuccess, simpleMsg)
klog.Infof(detailedMsg)
// File system resize succeeded, now update the PVC's Capacity to match the PV's
err = util.MarkFSResizeFinished(pvc, pv.Spec.Capacity, og.kubeClient)
if err != nil {
// On retry, resizeFileSystem will be called again but do nothing
return false, fmt.Errorf("MountVolume.resizeFileSystem update PVC status failed : %v", err)
}
return true, nil
}
}
return true, nil
}
func (og *operationGenerator) GenerateUnmountVolumeFunc(
volumeToUnmount MountedVolume,
actualStateOfWorld ActualStateOfWorldMounterUpdater,
podsDir string) (volumetypes.GeneratedOperations, error) {
var pluginName string
if volumeToUnmount.VolumeSpec != nil && useCSIPlugin(og.volumePluginMgr, volumeToUnmount.VolumeSpec) {
pluginName = csi.CSIPluginName
} else {
pluginName = volumeToUnmount.PluginName
}
// Get mountable plugin
volumePlugin, err := og.volumePluginMgr.FindPluginByName(pluginName)
if err != nil || volumePlugin == nil {
return volumetypes.GeneratedOperations{}, volumeToUnmount.GenerateErrorDetailed("UnmountVolume.FindPluginByName failed", err)
}
volumeUnmounter, newUnmounterErr := volumePlugin.NewUnmounter(
volumeToUnmount.InnerVolumeSpecName, volumeToUnmount.PodUID)
if newUnmounterErr != nil {
return volumetypes.GeneratedOperations{}, volumeToUnmount.GenerateErrorDetailed("UnmountVolume.NewUnmounter failed", newUnmounterErr)
}
unmountVolumeFunc := func() (error, error) {
subpather := og.volumePluginMgr.Host.GetSubpather()
// Remove all bind-mounts for subPaths
podDir := path.Join(podsDir, string(volumeToUnmount.PodUID))
if err := subpather.CleanSubPaths(podDir, volumeToUnmount.InnerVolumeSpecName); err != nil {
return volumeToUnmount.GenerateError("error cleaning subPath mounts", err)
}
// Execute unmount
unmountErr := volumeUnmounter.TearDown()
if unmountErr != nil {
// On failure, return error. Caller will log and retry.
return volumeToUnmount.GenerateError("UnmountVolume.TearDown failed", unmountErr)
}
klog.Infof(
"UnmountVolume.TearDown succeeded for volume %q (OuterVolumeSpecName: %q) pod %q (UID: %q). InnerVolumeSpecName %q. PluginName %q, VolumeGidValue %q",
volumeToUnmount.VolumeName,
volumeToUnmount.OuterVolumeSpecName,
volumeToUnmount.PodName,
volumeToUnmount.PodUID,
volumeToUnmount.InnerVolumeSpecName,
volumeToUnmount.PluginName,
volumeToUnmount.VolumeGidValue)
// Update actual state of world
markVolMountedErr := actualStateOfWorld.MarkVolumeAsUnmounted(
volumeToUnmount.PodName, volumeToUnmount.VolumeName)
if markVolMountedErr != nil {
// On failure, just log and exit
klog.Errorf(volumeToUnmount.GenerateErrorDetailed("UnmountVolume.MarkVolumeAsUnmounted failed", markVolMountedErr).Error())
}
return nil, nil
}
return volumetypes.GeneratedOperations{
OperationFunc: unmountVolumeFunc,
CompleteFunc: util.OperationCompleteHook(util.GetFullQualifiedPluginNameForVolume(volumePlugin.GetPluginName(), volumeToUnmount.VolumeSpec), "volume_unmount"),
EventRecorderFunc: nil, // nil because we do not want to generate event on error
}, nil
}
func (og *operationGenerator) GenerateUnmountDeviceFunc(
deviceToDetach AttachedVolume,
actualStateOfWorld ActualStateOfWorldMounterUpdater,
mounter mount.Interface) (volumetypes.GeneratedOperations, error) {
var pluginName string
if useCSIPlugin(og.volumePluginMgr, deviceToDetach.VolumeSpec) {
pluginName = csi.CSIPluginName
csiSpec, err := translateSpec(deviceToDetach.VolumeSpec)
if err != nil {
return volumetypes.GeneratedOperations{}, deviceToDetach.GenerateErrorDetailed("UnmountDevice.TranslateSpec failed", err)
}
deviceToDetach.VolumeSpec = csiSpec
} else {
pluginName = deviceToDetach.PluginName
}
// Get DeviceMounter plugin
deviceMountableVolumePlugin, err :=
og.volumePluginMgr.FindDeviceMountablePluginByName(pluginName)
if err != nil || deviceMountableVolumePlugin == nil {
return volumetypes.GeneratedOperations{}, deviceToDetach.GenerateErrorDetailed("UnmountDevice.FindDeviceMountablePluginByName failed", err)
}
volumeDeviceUmounter, err := deviceMountableVolumePlugin.NewDeviceUnmounter()
if err != nil {
return volumetypes.GeneratedOperations{}, deviceToDetach.GenerateErrorDetailed("UnmountDevice.NewDeviceUmounter failed", err)
}
volumeDeviceMounter, err := deviceMountableVolumePlugin.NewDeviceMounter()
if err != nil {
return volumetypes.GeneratedOperations{}, deviceToDetach.GenerateErrorDetailed("UnmountDevice.NewDeviceMounter failed", err)
}
unmountDeviceFunc := func() (error, error) {
//deviceMountPath := deviceToDetach.DeviceMountPath
deviceMountPath, err :=
volumeDeviceMounter.GetDeviceMountPath(deviceToDetach.VolumeSpec)
if err != nil {
// On failure, return error. Caller will log and retry.
return deviceToDetach.GenerateError("GetDeviceMountPath failed", err)
}
refs, err := deviceMountableVolumePlugin.GetDeviceMountRefs(deviceMountPath)
if err != nil || mount.HasMountRefs(deviceMountPath, refs) {
if err == nil {
err = fmt.Errorf("The device mount path %q is still mounted by other references %v", deviceMountPath, refs)
}
return deviceToDetach.GenerateError("GetDeviceMountRefs check failed", err)
}
// Execute unmount
unmountDeviceErr := volumeDeviceUmounter.UnmountDevice(deviceMountPath)
if unmountDeviceErr != nil {
// On failure, return error. Caller will log and retry.
return deviceToDetach.GenerateError("UnmountDevice failed", unmountDeviceErr)
}
// Before logging that UnmountDevice succeeded and moving on,
// use mounter.PathIsDevice to check if the path is a device,
// if so use mounter.DeviceOpened to check if the device is in use anywhere
// else on the system. Retry if it returns true.
deviceOpened, deviceOpenedErr := isDeviceOpened(deviceToDetach, mounter)
if deviceOpenedErr != nil {
return nil, deviceOpenedErr
}
// The device is still in use elsewhere. Caller will log and retry.
if deviceOpened {
return deviceToDetach.GenerateError(
"UnmountDevice failed",
goerrors.New("the device is in use when it was no longer expected to be in use"))
}
klog.Infof(deviceToDetach.GenerateMsg("UnmountDevice succeeded", ""))
// Update actual state of world
markDeviceUnmountedErr := actualStateOfWorld.MarkDeviceAsUnmounted(
deviceToDetach.VolumeName)
if markDeviceUnmountedErr != nil {
// On failure, return error. Caller will log and retry.
return deviceToDetach.GenerateError("MarkDeviceAsUnmounted failed", markDeviceUnmountedErr)
}
return nil, nil
}
return volumetypes.GeneratedOperations{
OperationFunc: unmountDeviceFunc,
CompleteFunc: util.OperationCompleteHook(util.GetFullQualifiedPluginNameForVolume(deviceMountableVolumePlugin.GetPluginName(), deviceToDetach.VolumeSpec), "unmount_device"),
EventRecorderFunc: nil, // nil because we do not want to generate event on error
}, nil
}
// GenerateMapVolumeFunc marks volume as mounted based on following steps.
// If plugin is attachable, call WaitForAttach() and then mark the device
// as mounted. On next step, SetUpDevice is called without dependent of
// plugin type, but this method mainly is targeted for none attachable plugin.
// After setup is done, create symbolic links on both global map path and pod
// device map path. Once symbolic links are created, take fd lock by
// loopback for the device to avoid silent volume replacement. This lock
// will be released once no one uses the device.
// If all steps are completed, the volume is marked as mounted.
func (og *operationGenerator) GenerateMapVolumeFunc(
waitForAttachTimeout time.Duration,
volumeToMount VolumeToMount,
actualStateOfWorld ActualStateOfWorldMounterUpdater) (volumetypes.GeneratedOperations, error) {
// Get block volume mapper plugin
var blockVolumeMapper volume.BlockVolumeMapper
blockVolumePlugin, err :=
og.volumePluginMgr.FindMapperPluginBySpec(volumeToMount.VolumeSpec)
if err != nil {
return volumetypes.GeneratedOperations{}, volumeToMount.GenerateErrorDetailed("MapVolume.FindMapperPluginBySpec failed", err)
}
if blockVolumePlugin == nil {
return volumetypes.GeneratedOperations{}, volumeToMount.GenerateErrorDetailed("MapVolume.FindMapperPluginBySpec failed to find BlockVolumeMapper plugin. Volume plugin is nil.", nil)
}
affinityErr := checkNodeAffinity(og, volumeToMount, blockVolumePlugin)
if affinityErr != nil {
eventErr, detailedErr := volumeToMount.GenerateError("MapVolume.NodeAffinity check failed", affinityErr)
og.recorder.Eventf(volumeToMount.Pod, v1.EventTypeWarning, kevents.FailedMountVolume, eventErr.Error())
return volumetypes.GeneratedOperations{}, detailedErr
}
blockVolumeMapper, newMapperErr := blockVolumePlugin.NewBlockVolumeMapper(
volumeToMount.VolumeSpec,
volumeToMount.Pod,
volume.VolumeOptions{})
if newMapperErr != nil {
eventErr, detailedErr := volumeToMount.GenerateError("MapVolume.NewBlockVolumeMapper initialization failed", newMapperErr)
og.recorder.Eventf(volumeToMount.Pod, v1.EventTypeWarning, kevents.FailedMapVolume, eventErr.Error())
return volumetypes.GeneratedOperations{}, detailedErr
}
// Get attacher, if possible
attachableVolumePlugin, _ :=
og.volumePluginMgr.FindAttachablePluginBySpec(volumeToMount.VolumeSpec)
var volumeAttacher volume.Attacher
if attachableVolumePlugin != nil {
volumeAttacher, _ = attachableVolumePlugin.NewAttacher()
}
mapVolumeFunc := func() (error, error) {
var devicePath string
// Set up global map path under the given plugin directory using symbolic link
globalMapPath, err :=
blockVolumeMapper.GetGlobalMapPath(volumeToMount.VolumeSpec)
if err != nil {
// On failure, return error. Caller will log and retry.
return volumeToMount.GenerateError("MapVolume.GetDeviceMountPath failed", err)
}
if volumeAttacher != nil {
// Wait for attachable volumes to finish attaching
klog.Infof(volumeToMount.GenerateMsgDetailed("MapVolume.WaitForAttach entering", fmt.Sprintf("DevicePath %q", volumeToMount.DevicePath)))
devicePath, err = volumeAttacher.WaitForAttach(
volumeToMount.VolumeSpec, volumeToMount.DevicePath, volumeToMount.Pod, waitForAttachTimeout)
if err != nil {
// On failure, return error. Caller will log and retry.
return volumeToMount.GenerateError("MapVolume.WaitForAttach failed", err)
}