/
backend.go
902 lines (764 loc) · 27.2 KB
/
backend.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
// Copyright 2019 NetApp, Inc. All Rights Reserved.
package storage
import (
"encoding/json"
"errors"
"fmt"
"strconv"
"time"
"github.com/RoaringBitmap/roaring"
"github.com/cenkalti/backoff"
"github.com/mitchellh/copystructure"
log "github.com/sirupsen/logrus"
tridentconfig "github.com/netapp/trident/config"
sa "github.com/netapp/trident/storage_attribute"
drivers "github.com/netapp/trident/storage_drivers"
"github.com/netapp/trident/utils"
)
// Driver provides a common interface for storage related operations
type Driver interface {
Name() string
Initialize(tridentconfig.DriverContext, string, *drivers.CommonStorageDriverConfig) error
Initialized() bool
// Terminate tells the driver to clean up, as it won't be called again.
Terminate()
Create(volConfig *VolumeConfig, storagePool *Pool, volAttributes map[string]sa.Request) error
CreatePrepare(volConfig *VolumeConfig) error
// CreateFollowup adds necessary information for accessing the volume to VolumeConfig.
CreateFollowup(volConfig *VolumeConfig) error
// GetInternalVolumeName will return a name that satisfies any character
// constraints present on the backend and that will be unique to Trident.
// The latter requirement should generally be done by prepending the
// value of CommonStorageDriver.SnapshotPrefix to the name.
CreateClone(volConfig *VolumeConfig) error
Import(volConfig *VolumeConfig, originalName string) error
Destroy(name string) error
Rename(name string, newName string) error
Resize(volConfig *VolumeConfig, sizeBytes uint64) error
Get(name string) error
GetInternalVolumeName(name string) string
GetStorageBackendSpecs(backend *Backend) error
GetProtocol() tridentconfig.Protocol
Publish(name string, publishInfo *utils.VolumePublishInfo) error
GetSnapshot(snapConfig *SnapshotConfig) (*Snapshot, error)
GetSnapshots(volConfig *VolumeConfig) ([]*Snapshot, error)
CreateSnapshot(snapConfig *SnapshotConfig) (*Snapshot, error)
RestoreSnapshot(snapConfig *SnapshotConfig) error
DeleteSnapshot(snapConfig *SnapshotConfig) error
StoreConfig(b *PersistentStorageBackendConfig)
// GetExternalConfig returns a version of the driver configuration that
// lacks confidential information, such as usernames and passwords.
GetExternalConfig() interface{}
// GetVolumeExternal accepts the internal name of a volume and returns a VolumeExternal
// object. This method is only available if using the passthrough store (i.e. Docker).
GetVolumeExternal(name string) (*VolumeExternal, error)
// GetVolumeExternalWrappers reads all volumes owned by this driver from the storage backend and
// writes them to the supplied channel as VolumeExternalWrapper objects. This method is only
// available if using the passthrough store (i.e. Docker).
GetVolumeExternalWrappers(chan *VolumeExternalWrapper)
GetUpdateType(driver Driver) *roaring.Bitmap
}
type Backend struct {
Driver Driver
Name string
BackendUUID string
Online bool
State BackendState
Storage map[string]*Pool
Volumes map[string]*Volume
}
type UpdateBackendStateRequest struct {
State string `json:"state"`
}
type NotManagedError struct {
volumeName string
}
func (e *NotManagedError) Error() string {
return fmt.Sprintf("volume %s is not managed by Trident", e.volumeName)
}
type BackendState string
const (
Unknown = BackendState("unknown")
Online = BackendState("online")
Offline = BackendState("offline")
Deleting = BackendState("deleting")
Failed = BackendState("failed")
)
func (s BackendState) String() string {
switch s {
case Unknown, Online, Offline, Deleting, Failed:
return string(s)
default:
return "unknown"
}
}
func (s BackendState) IsUnknown() bool {
switch s {
case Online, Offline, Deleting, Failed:
return false
case Unknown:
return true
default:
return true
}
}
func (s BackendState) IsOnline() bool {
return s == Online
}
func (s BackendState) IsOffline() bool {
return s == Offline
}
func (s BackendState) IsDeleting() bool {
return s == Deleting
}
func (s BackendState) IsFailed() bool {
return s == Failed
}
func NewStorageBackend(driver Driver) (*Backend, error) {
backend := Backend{
Driver: driver,
State: Online,
Online: true,
Storage: make(map[string]*Pool),
Volumes: make(map[string]*Volume),
}
// retrieve backend specs
if err := backend.Driver.GetStorageBackendSpecs(&backend); err != nil {
return nil, err
}
return &backend, nil
}
func NewFailedStorageBackend(driver Driver) *Backend {
backend := Backend{
Driver: driver,
State: Failed,
Storage: make(map[string]*Pool),
Volumes: make(map[string]*Volume),
}
log.WithFields(log.Fields{
"backend": backend,
"driver": driver,
}).Debug("NewFailedStorageBackend.")
return &backend
}
func (b *Backend) AddStoragePool(pool *Pool) {
b.Storage[pool.Name] = pool
}
func (b *Backend) GetDriverName() string {
return b.Driver.Name()
}
func (b *Backend) GetProtocol() tridentconfig.Protocol {
return b.Driver.GetProtocol()
}
func (b *Backend) AddVolume(
volConfig *VolumeConfig, storagePool *Pool, volAttributes map[string]sa.Request,
) (*Volume, error) {
var err error
log.WithFields(log.Fields{
"backend": b.Name,
"backendUUID": b.BackendUUID,
"volume": volConfig.InternalName,
"storage_pool": storagePool.Name,
"size": volConfig.Size,
"storage_class": volConfig.StorageClass,
}).Debug("Attempting volume create.")
// Ensure backend is ready
if err := b.ensureOnline(); err != nil {
return nil, err
}
// CreatePrepare should perform the following tasks:
// 1. Generate the internal volume name
// 2. Optionally perform any other steps that could veto volume creation
if err = b.Driver.CreatePrepare(volConfig); err != nil {
return nil, err
}
// Add volume to the backend
volumeExists := false
if err = b.Driver.Create(volConfig, storagePool, volAttributes); err != nil {
if drivers.IsVolumeExistsError(err) {
// Implement idempotency by ignoring the error if the volume exists already
volumeExists = true
log.WithFields(log.Fields{
"backend": b.Name,
"volume": volConfig.InternalName,
}).Warning("Volume already exists.")
} else {
// If the volume doesn't exist but the create failed, return the error
return nil, err
}
}
// Always perform the follow-up steps
if err = b.Driver.CreateFollowup(volConfig); err != nil {
// If follow-up fails and we just created the volume, clean up by deleting it
if !volumeExists {
errDestroy := b.Driver.Destroy(volConfig.InternalName)
if errDestroy != nil {
log.WithFields(log.Fields{
"backend": b.Name,
"volume": volConfig.InternalName,
}).Warnf("Mapping the created volume failed "+
"and %s wasn't able to delete it afterwards: %s. "+
"Volume must be manually deleted.",
tridentconfig.OrchestratorName, errDestroy)
}
}
// In all cases where follow-up fails, return the follow-up error
return nil, err
}
vol := NewVolume(volConfig, b.BackendUUID, storagePool.Name, false)
b.Volumes[vol.Config.Name] = vol
return vol, nil
}
func (b *Backend) CloneVolume(volConfig *VolumeConfig) (*Volume, error) {
log.WithFields(log.Fields{
"backend": volConfig.Name,
"backendUUID": b.BackendUUID,
"storage_class": volConfig.StorageClass,
"source_volume": volConfig.CloneSourceVolume,
"source_volume_internal": volConfig.CloneSourceVolumeInternal,
"source_snapshot": volConfig.CloneSourceSnapshot,
"clone_volume": volConfig.Name,
"clone_volume_internal": volConfig.InternalName,
}).Debug("Attempting volume clone.")
// Ensure volume is managed
if volConfig.ImportNotManaged {
return nil, &NotManagedError{volConfig.InternalName}
}
// Ensure backend is ready
if err := b.ensureOnline(); err != nil {
return nil, err
}
// CreatePrepare should perform the following tasks:
// 1. Sanitize the volume name
// 2. Ensure no volume with the same name exists on that backend
if err := b.Driver.CreatePrepare(volConfig); err != nil {
return nil, fmt.Errorf("failed to prepare clone create: %v", err)
}
err := b.Driver.CreateClone(volConfig)
if err != nil {
return nil, err
}
// The clone may not be fully created when the clone API returns, so wait here until it exists.
checkCloneExists := func() error {
return b.Driver.Get(volConfig.InternalName)
}
cloneExistsNotify := func(err error, duration time.Duration) {
log.WithField("increment", duration).Debug("Clone not yet present, waiting.")
}
cloneBackoff := backoff.NewExponentialBackOff()
cloneBackoff.InitialInterval = 1 * time.Second
cloneBackoff.Multiplier = 2
cloneBackoff.RandomizationFactor = 0.1
cloneBackoff.MaxElapsedTime = 90 * time.Second
// Run the clone check using an exponential backoff
if err := backoff.RetryNotify(checkCloneExists, cloneBackoff, cloneExistsNotify); err != nil {
log.WithField("clone_volume", volConfig.Name).Warnf("Could not find clone after %3.2f seconds.",
float64(cloneBackoff.MaxElapsedTime))
} else {
log.WithField("clone_volume", volConfig.Name).Debug("Clone found.")
}
err = b.Driver.CreateFollowup(volConfig)
if err != nil {
errDestroy := b.Driver.Destroy(volConfig.InternalName)
if errDestroy != nil {
log.WithFields(log.Fields{
"backend": b.Name,
"volume": volConfig.InternalName,
}).Warnf("Mapping the created volume failed "+
"and %s wasn't able to delete it afterwards: %s. "+
"Volume needs to be manually deleted.",
tridentconfig.OrchestratorName, errDestroy)
}
return nil, err
}
vol := NewVolume(volConfig, b.BackendUUID, drivers.UnsetPool, false)
b.Volumes[vol.Config.Name] = vol
return vol, nil
}
func (b *Backend) GetVolumeExternal(volumeName string) (*VolumeExternal, error) {
// Ensure backend is ready
if err := b.ensureOnline(); err != nil {
return nil, err
}
if b.Driver.Get(volumeName) != nil {
return nil, fmt.Errorf("volume %s was not found", volumeName)
}
volExternal, err := b.Driver.GetVolumeExternal(volumeName)
if err != nil {
return nil, fmt.Errorf("error requesting volume size: %v", err)
}
volExternal.Backend = b.Name
volExternal.BackendUUID = b.BackendUUID
return volExternal, nil
}
func (b *Backend) ImportVolume(volConfig *VolumeConfig) (*Volume, error) {
log.WithFields(log.Fields{
"backend": b.Name,
"volume": volConfig.ImportOriginalName,
"NotManaged": volConfig.ImportNotManaged,
}).Debug("Backend#ImportVolume")
// Ensure backend is ready
if err := b.ensureOnline(); err != nil {
return nil, err
}
if volConfig.ImportNotManaged {
// The volume is not managed and will not be renamed during import.
volConfig.InternalName = volConfig.ImportOriginalName
} else {
// CreatePrepare should perform the following tasks:
// 1. Sanitize the volume name
// 2. Ensure no volume with the same name exists on that backend
if err := b.Driver.CreatePrepare(volConfig); err != nil {
return nil, fmt.Errorf("failed to prepare import volume: %v", err)
}
}
err := b.Driver.Import(volConfig, volConfig.ImportOriginalName)
if err != nil {
return nil, fmt.Errorf("driver import volume failed: %v", err)
}
err = b.Driver.CreateFollowup(volConfig)
if err != nil {
return nil, fmt.Errorf("failed post import volume operations : %v", err)
}
volume := NewVolume(volConfig, b.BackendUUID, drivers.UnsetPool, false)
b.Volumes[volume.Config.Name] = volume
return volume, nil
}
func (b *Backend) ResizeVolume(volConfig *VolumeConfig, newSize string) error {
// Ensure volume is managed
if volConfig.ImportNotManaged {
return &NotManagedError{volConfig.InternalName}
}
// Ensure backend is ready
if err := b.ensureOnline(); err != nil {
return err
}
// Determine volume size in bytes
requestedSize, err := utils.ConvertSizeToBytes(newSize)
if err != nil {
return fmt.Errorf("could not convert volume size %s: %v", newSize, err)
}
newSizeBytes, err := strconv.ParseUint(requestedSize, 10, 64)
if err != nil {
return fmt.Errorf("%v is an invalid volume size: %v", newSize, err)
}
log.WithFields(log.Fields{
"backend": b.Name,
"volume": volConfig.InternalName,
"volume_size": newSizeBytes,
}).Debug("Attempting volume resize.")
return b.Driver.Resize(volConfig, newSizeBytes)
}
func (b *Backend) RenameVolume(volConfig *VolumeConfig, newName string) error {
oldName := volConfig.InternalName
// Ensure volume is managed
if volConfig.ImportNotManaged {
return &NotManagedError{oldName}
}
if b.State != Online {
log.WithFields(log.Fields{
"state": b.State,
"expectedState": string(Online),
}).Error("Invalid backend state.")
return fmt.Errorf("backend %s is not Online", b.Name)
}
if err := b.Driver.Get(oldName); err != nil {
return fmt.Errorf("volume %s not found on backend %s; %v", oldName, b.Name, err)
}
if err := b.Driver.Rename(oldName, newName); err != nil {
return fmt.Errorf("error attempting to rename volume %s on backend %s: %v", oldName, b.Name, err)
}
return nil
}
func (b *Backend) RemoveVolume(volConfig *VolumeConfig) error {
log.WithFields(log.Fields{
"backend": b.Name,
"volume": volConfig.Name,
}).Debug("Backend#RemoveVolume")
// Ensure volume is managed
if volConfig.ImportNotManaged {
return &NotManagedError{volConfig.InternalName}
}
// Ensure backend is ready
if err := b.ensureOnlineOrDeleting(); err != nil {
return err
}
if err := b.Driver.Destroy(volConfig.InternalName); err != nil {
// TODO: Check the error being returned once the nDVP throws errors
// for volumes that aren't found.
return err
}
b.RemoveCachedVolume(volConfig.Name)
return nil
}
func (b *Backend) RemoveCachedVolume(volumeName string) {
if _, ok := b.Volumes[volumeName]; ok {
delete(b.Volumes, volumeName)
}
}
func (b *Backend) GetSnapshot(snapConfig *SnapshotConfig) (*Snapshot, error) {
log.WithFields(log.Fields{
"backend": b.Name,
"volumeName": snapConfig.VolumeName,
"snapshotName": snapConfig.Name,
}).Debug("GetSnapshot.")
// Ensure backend is ready
if err := b.ensureOnline(); err != nil {
return nil, err
}
if snapshot, err := b.Driver.GetSnapshot(snapConfig); err != nil {
// An error here means we couldn't check for the snapshot. It does not mean the snapshot doesn't exist.
return nil, err
} else if snapshot == nil {
// No error and no snapshot means the snapshot doesn't exist.
return nil, fmt.Errorf("snapshot %s on volume %s not found", snapConfig.Name, snapConfig.VolumeName)
} else {
return snapshot, nil
}
}
func (b *Backend) GetSnapshots(volConfig *VolumeConfig) ([]*Snapshot, error) {
log.WithFields(log.Fields{
"backend": b.Name,
"volumeName": volConfig.Name,
}).Debug("GetSnapshots.")
// Ensure backend is ready
if err := b.ensureOnline(); err != nil {
return nil, err
}
return b.Driver.GetSnapshots(volConfig)
}
func (b *Backend) CreateSnapshot(snapConfig *SnapshotConfig, volConfig *VolumeConfig) (*Snapshot, error) {
log.WithFields(log.Fields{
"backend": b.Name,
"volumeName": snapConfig.VolumeName,
"snapshotName": snapConfig.Name,
}).Debug("Attempting snapshot create.")
// Ensure volume is managed
if volConfig.ImportNotManaged {
return nil, &NotManagedError{volConfig.InternalName}
}
// Ensure backend is ready
if err := b.ensureOnline(); err != nil {
return nil, err
}
// Set the default internal snapshot name to match the snapshot name. Drivers
// may override this value in the SnapshotConfig structure if necessary.
snapConfig.InternalName = snapConfig.Name
// Implement idempotency by checking for the snapshot first
if existingSnapshot, err := b.Driver.GetSnapshot(snapConfig); err != nil {
// An error here means we couldn't check for the snapshot. It does not mean the snapshot doesn't exist.
return nil, err
} else if existingSnapshot != nil {
log.WithFields(log.Fields{
"backend": b.Name,
"volumeName": snapConfig.VolumeName,
"snapshotName": snapConfig.Name,
}).Warning("Snapshot already exists.")
// Snapshot already exists, so just return it
return existingSnapshot, nil
}
// Create snapshot
return b.Driver.CreateSnapshot(snapConfig)
}
func (b *Backend) RestoreSnapshot(snapConfig *SnapshotConfig, volConfig *VolumeConfig) error {
log.WithFields(log.Fields{
"backend": b.Name,
"volumeName": snapConfig.VolumeName,
"snapshotName": snapConfig.Name,
}).Debug("Attempting snapshot restore.")
// Ensure volume is managed
if volConfig.ImportNotManaged {
return &NotManagedError{volConfig.InternalName}
}
// Ensure backend is ready
if err := b.ensureOnline(); err != nil {
return err
}
// Restore snapshot
return b.Driver.RestoreSnapshot(snapConfig)
}
func (b *Backend) DeleteSnapshot(snapConfig *SnapshotConfig, volConfig *VolumeConfig) error {
log.WithFields(log.Fields{
"backend": b.Name,
"volumeName": snapConfig.VolumeName,
"snapshotName": snapConfig.Name,
}).Debug("Attempting snapshot delete.")
// Ensure volume is managed
if volConfig.ImportNotManaged {
return &NotManagedError{volConfig.InternalName}
}
// Ensure backend is ready
if err := b.ensureOnlineOrDeleting(); err != nil {
return err
}
// Implement idempotency by checking for the snapshot first
if existingSnapshot, err := b.Driver.GetSnapshot(snapConfig); err != nil {
// An error here means we couldn't check for the snapshot. It does not mean the snapshot doesn't exist.
return err
} else if existingSnapshot == nil {
log.WithFields(log.Fields{
"backend": b.Name,
"volumeName": snapConfig.VolumeName,
"snapshotName": snapConfig.Name,
}).Warning("Snapshot not found.")
// Snapshot does not exist, so just return without error.
return nil
}
// Delete snapshot
return b.Driver.DeleteSnapshot(snapConfig)
}
const (
BackendRename = iota
VolumeAccessInfoChange
InvalidUpdate
UsernameChange
PasswordChange
)
func (b *Backend) GetUpdateType(origBackend *Backend) *roaring.Bitmap {
updateCode := b.Driver.GetUpdateType(origBackend.Driver)
if b.Name != origBackend.Name {
updateCode.Add(BackendRename)
}
return updateCode
}
// HasVolumes returns true if the Backend has one or more volumes
// provisioned on it.
func (b *Backend) HasVolumes() bool {
return len(b.Volumes) > 0
}
// Terminate informs the backend that it is being deleted from the core
// and will not be called again. This may be a signal to the storage
// driver to clean up and stop any ongoing operations.
func (b *Backend) Terminate() {
logFields := log.Fields{
"backend": b.Name,
"backendUUID": b.BackendUUID,
"driver": b.GetDriverName(),
"state": string(b.State),
}
if !b.Driver.Initialized() {
log.WithFields(logFields).Warning("Cannot terminate an uninitialized backend.")
} else {
log.WithFields(logFields).Debug("Terminating backend.")
b.Driver.Terminate()
}
}
func (b *Backend) ensureOnline() error {
if b.State != Online {
log.WithFields(log.Fields{
"state": b.State,
"expectedState": string(Online),
}).Error("Invalid backend state.")
return fmt.Errorf("backend %s is not Online", b.Name)
}
return nil
}
func (b *Backend) ensureOnlineOrDeleting() error {
if b.State != Online && b.State != Deleting {
log.WithFields(log.Fields{
"state": b.State,
"expectedState": string(Online) + "/" + string(Deleting),
}).Error("Invalid backend state.")
return fmt.Errorf("backend %s is not Online or Deleting", b.Name)
}
return nil
}
type BackendExternal struct {
Name string `json:"name"`
BackendUUID string `json:"backendUUID"`
Protocol tridentconfig.Protocol `json:"protocol"`
Config interface{} `json:"config"`
Storage map[string]interface{} `json:"storage"`
State BackendState `json:"state"`
Online bool `json:"online"`
Volumes []string `json:"volumes"`
}
func (b *Backend) ConstructExternal() *BackendExternal {
backendExternal := BackendExternal{
Name: b.Name,
BackendUUID: b.BackendUUID,
Protocol: b.GetProtocol(),
Config: b.Driver.GetExternalConfig(),
Storage: make(map[string]interface{}),
Online: b.Online,
State: b.State,
Volumes: make([]string, 0),
}
for name, pool := range b.Storage {
backendExternal.Storage[name] = pool.ConstructExternal()
}
for volName := range b.Volumes {
backendExternal.Volumes = append(backendExternal.Volumes, volName)
}
return &backendExternal
}
// Used to store the requisite info for a backend in etcd. Other than
// the configuration, all other data will be reconstructed during the bootstrap
// phase
type PersistentStorageBackendConfig struct {
OntapConfig *drivers.OntapStorageDriverConfig `json:"ontap_config,omitempty"`
SolidfireConfig *drivers.SolidfireStorageDriverConfig `json:"solidfire_config,omitempty"`
EseriesConfig *drivers.ESeriesStorageDriverConfig `json:"eseries_config,omitempty"`
AWSConfig *drivers.AWSNFSStorageDriverConfig `json:"aws_config,omitempty"`
AzureConfig *drivers.AzureNFSStorageDriverConfig `json:"azure_config,omitempty"`
GCPConfig *drivers.GCPNFSStorageDriverConfig `json:"gcp_config,omitempty"`
FakeStorageDriverConfig *drivers.FakeStorageDriverConfig `json:"fake_config,omitempty"`
}
type BackendPersistent struct {
Version string `json:"version"`
Config PersistentStorageBackendConfig `json:"config"`
Name string `json:"name"`
BackendUUID string `json:"backendUUID"`
Online bool `json:"online"`
State BackendState `json:"state"`
}
func (b *Backend) ConstructPersistent() *BackendPersistent {
persistentBackend := &BackendPersistent{
Version: tridentconfig.OrchestratorAPIVersion,
Config: PersistentStorageBackendConfig{},
Name: b.Name,
Online: b.Online,
State: b.State,
BackendUUID: b.BackendUUID,
}
b.Driver.StoreConfig(&persistentBackend.Config)
return persistentBackend
}
// Unfortunately, this method appears to be necessary to avoid arbitrary values
// ending up in the json.RawMessage fields of CommonStorageDriverConfig.
// Ideally, BackendPersistent would just store a serialized config, but
// doing so appears to cause problems with the json.RawMessage fields.
func (p *BackendPersistent) MarshalConfig() (string, error) {
var (
bytes []byte
err error
)
switch {
case p.Config.OntapConfig != nil:
bytes, err = json.Marshal(p.Config.OntapConfig)
case p.Config.SolidfireConfig != nil:
bytes, err = json.Marshal(p.Config.SolidfireConfig)
case p.Config.EseriesConfig != nil:
bytes, err = json.Marshal(p.Config.EseriesConfig)
case p.Config.AWSConfig != nil:
bytes, err = json.Marshal(p.Config.AWSConfig)
case p.Config.AzureConfig != nil:
bytes, err = json.Marshal(p.Config.AzureConfig)
case p.Config.GCPConfig != nil:
bytes, err = json.Marshal(p.Config.GCPConfig)
case p.Config.FakeStorageDriverConfig != nil:
bytes, err = json.Marshal(p.Config.FakeStorageDriverConfig)
default:
return "", fmt.Errorf("no recognized config found for backend %s", p.Name)
}
if err != nil {
return "", err
}
return string(bytes), err
}
// ExtractBackendSecrets clones itself (a BackendPersistent struct), builds a map of any secret data it
// contains (credentials, etc.), clears those fields in the clone, and returns the clone and the map.
func (p *BackendPersistent) ExtractBackendSecrets(secretName string) (*BackendPersistent, map[string]string, error) {
clone, err := copystructure.Copy(*p)
if err != nil {
return nil, nil, err
}
backend, ok := clone.(BackendPersistent)
if !ok {
return nil, nil, err
}
secretName = fmt.Sprintf("secret:%s", secretName)
secretMap := make(map[string]string)
switch {
case backend.Config.OntapConfig != nil:
secretMap["Username"] = backend.Config.OntapConfig.Username
secretMap["Password"] = backend.Config.OntapConfig.Password
backend.Config.OntapConfig.Username = secretName
backend.Config.OntapConfig.Password = secretName
case p.Config.SolidfireConfig != nil:
secretMap["EndPoint"] = backend.Config.SolidfireConfig.EndPoint
backend.Config.SolidfireConfig.EndPoint = secretName
case p.Config.EseriesConfig != nil:
secretMap["Username"] = backend.Config.EseriesConfig.Username
secretMap["Password"] = backend.Config.EseriesConfig.Password
secretMap["PasswordArray"] = backend.Config.EseriesConfig.PasswordArray
backend.Config.EseriesConfig.Username = secretName
backend.Config.EseriesConfig.Password = secretName
backend.Config.EseriesConfig.PasswordArray = secretName
case p.Config.AWSConfig != nil:
secretMap["APIKey"] = backend.Config.AWSConfig.APIKey
secretMap["SecretKey"] = backend.Config.AWSConfig.SecretKey
backend.Config.AWSConfig.APIKey = secretName
backend.Config.AWSConfig.SecretKey = secretName
case p.Config.AzureConfig != nil:
secretMap["ClientID"] = backend.Config.AzureConfig.ClientID
secretMap["ClientSecret"] = backend.Config.AzureConfig.ClientSecret
backend.Config.AzureConfig.ClientID = secretName
backend.Config.AzureConfig.ClientSecret = secretName
case p.Config.GCPConfig != nil:
secretMap["Private_Key"] = backend.Config.GCPConfig.APIKey.PrivateKey
secretMap["Private_Key_ID"] = backend.Config.GCPConfig.APIKey.PrivateKeyID
backend.Config.GCPConfig.APIKey.PrivateKey = secretName
backend.Config.GCPConfig.APIKey.PrivateKeyID = secretName
case p.Config.FakeStorageDriverConfig != nil:
// Nothing to do
default:
return nil, nil, errors.New("cannot extract secrets, unknown backend type")
}
return &backend, secretMap, nil
}
func (p *BackendPersistent) InjectBackendSecrets(secretMap map[string]string) error {
makeError := func(fieldName string) error {
return fmt.Errorf("%s field missing from backend secrets", fieldName)
}
var ok bool
switch {
case p.Config.OntapConfig != nil:
if p.Config.OntapConfig.Username, ok = secretMap["Username"]; !ok {
return makeError("Username")
}
if p.Config.OntapConfig.Password, ok = secretMap["Password"]; !ok {
return makeError("Password")
}
case p.Config.SolidfireConfig != nil:
if p.Config.SolidfireConfig.EndPoint, ok = secretMap["EndPoint"]; !ok {
return makeError("EndPoint")
}
case p.Config.EseriesConfig != nil:
if p.Config.EseriesConfig.Username, ok = secretMap["Username"]; !ok {
return makeError("Username")
}
if p.Config.EseriesConfig.Password, ok = secretMap["Password"]; !ok {
return makeError("Password")
}
if p.Config.EseriesConfig.PasswordArray, ok = secretMap["PasswordArray"]; !ok {
return makeError("PasswordArray")
}
case p.Config.AWSConfig != nil:
if p.Config.AWSConfig.APIKey, ok = secretMap["APIKey"]; !ok {
return makeError("APIKey")
}
if p.Config.AWSConfig.SecretKey, ok = secretMap["SecretKey"]; !ok {
return makeError("SecretKey")
}
case p.Config.AzureConfig != nil:
if p.Config.AzureConfig.ClientID, ok = secretMap["ClientID"]; !ok {
return makeError("ClientID")
}
if p.Config.AzureConfig.ClientSecret, ok = secretMap["ClientSecret"]; !ok {
return makeError("ClientSecret")
}
case p.Config.GCPConfig != nil:
if p.Config.GCPConfig.APIKey.PrivateKey, ok = secretMap["Private_Key"]; !ok {
return makeError("Private_Key")
}
if p.Config.GCPConfig.APIKey.PrivateKeyID, ok = secretMap["Private_Key_ID"]; !ok {
return makeError("Private_Key_ID")
}
case p.Config.FakeStorageDriverConfig != nil:
// Nothing to do
default:
return errors.New("cannot inject secrets, unknown backend type")
}
return nil
}