aboutsummaryrefslogtreecommitdiffstats
path: root/src/clm/pkg/cluster/cluster.go
blob: fb8768d67b620b734b75e26587181a70b60ff9a7 (plain)
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
/*
 * Copyright 2020 Intel Corporation, Inc
 *
 * 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 cluster

import (
	"time"

	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/appcontext"
	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/db"
	mtypes "github.com/onap/multicloud-k8s/src/orchestrator/pkg/module/types"
	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/state"

	pkgerrors "github.com/pkg/errors"
)

type clientDbInfo struct {
	storeName  string // name of the mongodb collection to use for client documents
	tagMeta    string // attribute key name for the json data of a client document
	tagContent string // attribute key name for the file data of a client document
	tagState   string // attribute key name for StateInfo object in the cluster
}

// ClusterProvider contains the parameters needed for ClusterProviders
type ClusterProvider struct {
	Metadata mtypes.Metadata `json:"metadata"`
}

type Cluster struct {
	Metadata mtypes.Metadata `json:"metadata"`
}

type ClusterContent struct {
	Kubeconfig string `json:"kubeconfig"`
}

type ClusterLabel struct {
	LabelName string `json:"label-name"`
}

type ClusterKvPairs struct {
	Metadata mtypes.Metadata `json:"metadata"`
	Spec     ClusterKvSpec   `json:"spec"`
}

type ClusterKvSpec struct {
	Kv []map[string]interface{} `json:"kv"`
}

// ClusterProviderKey is the key structure that is used in the database
type ClusterProviderKey struct {
	ClusterProviderName string `json:"provider"`
}

// ClusterKey is the key structure that is used in the database
type ClusterKey struct {
	ClusterProviderName string `json:"provider"`
	ClusterName         string `json:"cluster"`
}

// ClusterLabelKey is the key structure that is used in the database
type ClusterLabelKey struct {
	ClusterProviderName string `json:"provider"`
	ClusterName         string `json:"cluster"`
	ClusterLabelName    string `json:"label"`
}

// LabelKey is the key structure that is used in the database
type LabelKey struct {
	ClusterProviderName string `json:"provider"`
	ClusterLabelName    string `json:"label"`
}

// ClusterKvPairsKey is the key structure that is used in the database
type ClusterKvPairsKey struct {
	ClusterProviderName string `json:"provider"`
	ClusterName         string `json:"cluster"`
	ClusterKvPairsName  string `json:"kvname"`
}

const SEPARATOR = "+"
const CONTEXT_CLUSTER_APP = "network-intents"
const CONTEXT_CLUSTER_RESOURCE = "network-intents"

// ClusterManager is an interface exposes the Cluster functionality
type ClusterManager interface {
	CreateClusterProvider(pr ClusterProvider) (ClusterProvider, error)
	GetClusterProvider(name string) (ClusterProvider, error)
	GetClusterProviders() ([]ClusterProvider, error)
	DeleteClusterProvider(name string) error
	CreateCluster(provider string, pr Cluster, qr ClusterContent) (Cluster, error)
	GetCluster(provider, name string) (Cluster, error)
	GetClusterContent(provider, name string) (ClusterContent, error)
	GetClusterState(provider, name string) (state.StateInfo, error)
	GetClusters(provider string) ([]Cluster, error)
	GetClustersWithLabel(provider, label string) ([]string, error)
	DeleteCluster(provider, name string) error
	CreateClusterLabel(provider, cluster string, pr ClusterLabel) (ClusterLabel, error)
	GetClusterLabel(provider, cluster, label string) (ClusterLabel, error)
	GetClusterLabels(provider, cluster string) ([]ClusterLabel, error)
	DeleteClusterLabel(provider, cluster, label string) error
	CreateClusterKvPairs(provider, cluster string, pr ClusterKvPairs) (ClusterKvPairs, error)
	GetClusterKvPairs(provider, cluster, kvpair string) (ClusterKvPairs, error)
	GetAllClusterKvPairs(provider, cluster string) ([]ClusterKvPairs, error)
	DeleteClusterKvPairs(provider, cluster, kvpair string) error
}

// ClusterClient implements the Manager
// It will also be used to maintain some localized state
type ClusterClient struct {
	db clientDbInfo
}

// NewClusterClient returns an instance of the ClusterClient
// which implements the Manager
func NewClusterClient() *ClusterClient {
	return &ClusterClient{
		db: clientDbInfo{
			storeName:  "cluster",
			tagMeta:    "clustermetadata",
			tagContent: "clustercontent",
			tagState:   "stateInfo",
		},
	}
}

// CreateClusterProvider - create a new Cluster Provider
func (v *ClusterClient) CreateClusterProvider(p ClusterProvider) (ClusterProvider, error) {

	//Construct key and tag to select the entry
	key := ClusterProviderKey{
		ClusterProviderName: p.Metadata.Name,
	}

	//Check if this ClusterProvider already exists
	_, err := v.GetClusterProvider(p.Metadata.Name)
	if err == nil {
		return ClusterProvider{}, pkgerrors.New("ClusterProvider already exists")
	}

	err = db.DBconn.Insert(v.db.storeName, key, nil, v.db.tagMeta, p)
	if err != nil {
		return ClusterProvider{}, pkgerrors.Wrap(err, "Creating DB Entry")
	}

	return p, nil
}

// GetClusterProvider returns the ClusterProvider for corresponding name
func (v *ClusterClient) GetClusterProvider(name string) (ClusterProvider, error) {

	//Construct key and tag to select the entry
	key := ClusterProviderKey{
		ClusterProviderName: name,
	}

	value, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
	if err != nil {
		return ClusterProvider{}, pkgerrors.Wrap(err, "Get ClusterProvider")
	}

	//value is a byte array
	if value != nil {
		cp := ClusterProvider{}
		err = db.DBconn.Unmarshal(value[0], &cp)
		if err != nil {
			return ClusterProvider{}, pkgerrors.Wrap(err, "Unmarshalling Value")
		}
		return cp, nil
	}

	return ClusterProvider{}, pkgerrors.New("Error getting ClusterProvider")
}

// GetClusterProviderList returns all of the ClusterProvider for corresponding name
func (v *ClusterClient) GetClusterProviders() ([]ClusterProvider, error) {

	//Construct key and tag to select the entry
	key := ClusterProviderKey{
		ClusterProviderName: "",
	}

	var resp []ClusterProvider
	values, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
	if err != nil {
		return []ClusterProvider{}, pkgerrors.Wrap(err, "Get ClusterProviders")
	}

	for _, value := range values {
		cp := ClusterProvider{}
		err = db.DBconn.Unmarshal(value, &cp)
		if err != nil {
			return []ClusterProvider{}, pkgerrors.Wrap(err, "Unmarshalling Value")
		}
		resp = append(resp, cp)
	}

	return resp, nil
}

// DeleteClusterProvider the  ClusterProvider from database
func (v *ClusterClient) DeleteClusterProvider(name string) error {

	//Construct key and tag to select the entry
	key := ClusterProviderKey{
		ClusterProviderName: name,
	}

	err := db.DBconn.Remove(v.db.storeName, key)
	if err != nil {
		return pkgerrors.Wrap(err, "Delete ClusterProvider Entry;")
	}

	return nil
}

// CreateCluster - create a new Cluster for a cluster-provider
func (v *ClusterClient) CreateCluster(provider string, p Cluster, q ClusterContent) (Cluster, error) {

	//Construct key and tag to select the entry
	key := ClusterKey{
		ClusterProviderName: provider,
		ClusterName:         p.Metadata.Name,
	}

	//Verify ClusterProvider already exists
	_, err := v.GetClusterProvider(provider)
	if err != nil {
		return Cluster{}, pkgerrors.New("ClusterProvider does not exist")
	}

	//Check if this Cluster already exists
	_, err = v.GetCluster(provider, p.Metadata.Name)
	if err == nil {
		return Cluster{}, pkgerrors.New("Cluster already exists")
	}

	err = db.DBconn.Insert(v.db.storeName, key, nil, v.db.tagMeta, p)
	if err != nil {
		return Cluster{}, pkgerrors.Wrap(err, "Creating DB Entry")
	}
	err = db.DBconn.Insert(v.db.storeName, key, nil, v.db.tagContent, q)
	if err != nil {
		return Cluster{}, pkgerrors.Wrap(err, "Creating DB Entry")
	}

	// Add the stateInfo record
	s := state.StateInfo{}
	a := state.ActionEntry{
		State:     state.StateEnum.Created,
		ContextId: "",
		TimeStamp: time.Now(),
	}
	s.Actions = append(s.Actions, a)

	err = db.DBconn.Insert(v.db.storeName, key, nil, v.db.tagState, s)
	if err != nil {
		return Cluster{}, pkgerrors.Wrap(err, "Creating cluster StateInfo")
	}

	return p, nil
}

// GetCluster returns the Cluster for corresponding provider and name
func (v *ClusterClient) GetCluster(provider, name string) (Cluster, error) {
	//Construct key and tag to select the entry
	key := ClusterKey{
		ClusterProviderName: provider,
		ClusterName:         name,
	}

	value, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
	if err != nil {
		return Cluster{}, pkgerrors.Wrap(err, "Get Cluster")
	}

	//value is a byte array
	if value != nil {
		cl := Cluster{}
		err = db.DBconn.Unmarshal(value[0], &cl)
		if err != nil {
			return Cluster{}, pkgerrors.Wrap(err, "Unmarshalling Value")
		}
		return cl, nil
	}

	return Cluster{}, pkgerrors.New("Error getting Cluster")
}

// GetClusterContent returns the ClusterContent for corresponding provider and name
func (v *ClusterClient) GetClusterContent(provider, name string) (ClusterContent, error) {
	//Construct key and tag to select the entry
	key := ClusterKey{
		ClusterProviderName: provider,
		ClusterName:         name,
	}

	value, err := db.DBconn.Find(v.db.storeName, key, v.db.tagContent)
	if err != nil {
		return ClusterContent{}, pkgerrors.Wrap(err, "Get Cluster Content")
	}

	//value is a byte array
	if value != nil {
		cc := ClusterContent{}
		err = db.DBconn.Unmarshal(value[0], &cc)
		if err != nil {
			return ClusterContent{}, pkgerrors.Wrap(err, "Unmarshalling Value")
		}
		return cc, nil
	}

	return ClusterContent{}, pkgerrors.New("Error getting Cluster Content")
}

// GetClusterState returns the StateInfo structure for corresponding cluster provider and cluster
func (v *ClusterClient) GetClusterState(provider, name string) (state.StateInfo, error) {
	//Construct key and tag to select the entry
	key := ClusterKey{
		ClusterProviderName: provider,
		ClusterName:         name,
	}

	result, err := db.DBconn.Find(v.db.storeName, key, v.db.tagState)
	if err != nil {
		return state.StateInfo{}, pkgerrors.Wrap(err, "Get Cluster StateInfo")
	}

	if result != nil {
		s := state.StateInfo{}
		err = db.DBconn.Unmarshal(result[0], &s)
		if err != nil {
			return state.StateInfo{}, pkgerrors.Wrap(err, "Unmarshalling Cluster StateInfo")
		}
		return s, nil
	}

	return state.StateInfo{}, pkgerrors.New("Error getting Cluster StateInfo")
}

// GetClusters returns all the Clusters for corresponding provider
func (v *ClusterClient) GetClusters(provider string) ([]Cluster, error) {
	//Construct key and tag to select the entry
	key := ClusterKey{
		ClusterProviderName: provider,
		ClusterName:         "",
	}

	values, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
	if err != nil {
		return []Cluster{}, pkgerrors.Wrap(err, "Get Clusters")
	}

	var resp []Cluster

	for _, value := range values {
		cp := Cluster{}
		err = db.DBconn.Unmarshal(value, &cp)
		if err != nil {
			return []Cluster{}, pkgerrors.Wrap(err, "Unmarshalling Value")
		}
		resp = append(resp, cp)
	}

	return resp, nil
}

// GetClustersWithLabel returns all the Clusters with Labels for provider
// Support Query like /cluster-providers/{Provider}/clusters?label={label}
func (v *ClusterClient) GetClustersWithLabel(provider, label string) ([]string, error) {
	//Construct key and tag to select the entry
	key := LabelKey{
		ClusterProviderName: provider,
		ClusterLabelName:    label,
	}

	values, err := db.DBconn.Find(v.db.storeName, key, "cluster")
	if err != nil {
		return []string{}, pkgerrors.Wrap(err, "Get Clusters by label")
	}
	var resp []string

	for _, value := range values {
		cp := string(value)
		resp = append(resp, cp)
	}

	return resp, nil
}

// DeleteCluster the  Cluster from database
func (v *ClusterClient) DeleteCluster(provider, name string) error {
	//Construct key and tag to select the entry
	key := ClusterKey{
		ClusterProviderName: provider,
		ClusterName:         name,
	}
	s, err := v.GetClusterState(provider, name)
	if err != nil {
		return pkgerrors.Errorf("Error getting current state from Cluster: " + name)
	}

	stateVal, err := state.GetCurrentStateFromStateInfo(s)
	if err != nil {
		return pkgerrors.Errorf("Error getting current state from Cluster stateInfo: " + name)
	}

	if stateVal == state.StateEnum.Applied {
		return pkgerrors.Errorf("Cluster network intents must be terminated before it can be deleted " + name)
	}

	// remove the app contexts associated with this cluster
	if stateVal == state.StateEnum.Terminated {
		// Verify that the appcontext has completed terminating
		ctxid := state.GetLastContextIdFromStateInfo(s)
		acStatus, err := state.GetAppContextStatus(ctxid)
		if err == nil &&
			!(acStatus.Status == appcontext.AppContextStatusEnum.Terminated || acStatus.Status == appcontext.AppContextStatusEnum.TerminateFailed) {
			return pkgerrors.Errorf("Network intents for cluster have not completed terminating " + name)
		}

		for _, id := range state.GetContextIdsFromStateInfo(s) {
			context, err := state.GetAppContextFromId(id)
			if err != nil {
				return pkgerrors.Wrap(err, "Error getting appcontext from Cluster StateInfo")
			}
			err = context.DeleteCompositeApp()
			if err != nil {
				return pkgerrors.Wrap(err, "Error deleting appcontext for Cluster")
			}
		}
	}

	err = db.DBconn.Remove(v.db.storeName, key)
	if err != nil {
		return pkgerrors.Wrap(err, "Delete Cluster Entry;")
	}

	return nil
}

// CreateClusterLabel - create a new Cluster Label mongo document for a cluster-provider/cluster
func (v *ClusterClient) CreateClusterLabel(provider string, cluster string, p ClusterLabel) (ClusterLabel, error) {
	//Construct key and tag to select the entry
	key := ClusterLabelKey{
		ClusterProviderName: provider,
		ClusterName:         cluster,
		ClusterLabelName:    p.LabelName,
	}

	//Verify Cluster already exists
	_, err := v.GetCluster(provider, cluster)
	if err != nil {
		return ClusterLabel{}, pkgerrors.New("Cluster does not exist")
	}

	//Check if this ClusterLabel already exists
	_, err = v.GetClusterLabel(provider, cluster, p.LabelName)
	if err == nil {
		return ClusterLabel{}, pkgerrors.New("Cluster Label already exists")
	}

	err = db.DBconn.Insert(v.db.storeName, key, nil, v.db.tagMeta, p)
	if err != nil {
		return ClusterLabel{}, pkgerrors.Wrap(err, "Creating DB Entry")
	}

	return p, nil
}

// GetClusterLabel returns the Cluster for corresponding provider, cluster and label
func (v *ClusterClient) GetClusterLabel(provider, cluster, label string) (ClusterLabel, error) {
	//Construct key and tag to select the entry
	key := ClusterLabelKey{
		ClusterProviderName: provider,
		ClusterName:         cluster,
		ClusterLabelName:    label,
	}

	value, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
	if err != nil {
		return ClusterLabel{}, pkgerrors.Wrap(err, "Get Cluster")
	}

	//value is a byte array
	if value != nil {
		cl := ClusterLabel{}
		err = db.DBconn.Unmarshal(value[0], &cl)
		if err != nil {
			return ClusterLabel{}, pkgerrors.Wrap(err, "Unmarshalling Value")
		}
		return cl, nil
	}

	return ClusterLabel{}, pkgerrors.New("Error getting Cluster")
}

// GetClusterLabels returns the Cluster Labels for corresponding provider and cluster
func (v *ClusterClient) GetClusterLabels(provider, cluster string) ([]ClusterLabel, error) {
	//Construct key and tag to select the entry
	key := ClusterLabelKey{
		ClusterProviderName: provider,
		ClusterName:         cluster,
		ClusterLabelName:    "",
	}

	values, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
	if err != nil {
		return []ClusterLabel{}, pkgerrors.Wrap(err, "Get Cluster Labels")
	}

	var resp []ClusterLabel

	for _, value := range values {
		cp := ClusterLabel{}
		err = db.DBconn.Unmarshal(value, &cp)
		if err != nil {
			return []ClusterLabel{}, pkgerrors.Wrap(err, "Unmarshalling Value")
		}
		resp = append(resp, cp)
	}

	return resp, nil
}

// Delete the Cluster Label from database
func (v *ClusterClient) DeleteClusterLabel(provider, cluster, label string) error {
	//Construct key and tag to select the entry
	key := ClusterLabelKey{
		ClusterProviderName: provider,
		ClusterName:         cluster,
		ClusterLabelName:    label,
	}

	err := db.DBconn.Remove(v.db.storeName, key)
	if err != nil {
		return pkgerrors.Wrap(err, "Delete ClusterLabel Entry;")
	}

	return nil
}

// CreateClusterKvPairs - Create a New Cluster KV pairs document
func (v *ClusterClient) CreateClusterKvPairs(provider string, cluster string, p ClusterKvPairs) (ClusterKvPairs, error) {
	key := ClusterKvPairsKey{
		ClusterProviderName: provider,
		ClusterName:         cluster,
		ClusterKvPairsName:  p.Metadata.Name,
	}

	//Verify Cluster already exists
	_, err := v.GetCluster(provider, cluster)
	if err != nil {
		return ClusterKvPairs{}, pkgerrors.New("Cluster does not exist")
	}

	//Check if this ClusterKvPairs already exists
	_, err = v.GetClusterKvPairs(provider, cluster, p.Metadata.Name)
	if err == nil {
		return ClusterKvPairs{}, pkgerrors.New("Cluster KV Pair already exists")
	}

	err = db.DBconn.Insert(v.db.storeName, key, nil, v.db.tagMeta, p)
	if err != nil {
		return ClusterKvPairs{}, pkgerrors.Wrap(err, "Creating DB Entry")
	}

	return p, nil
}

// GetClusterKvPairs returns the Cluster KeyValue pair for corresponding provider, cluster and KV pair name
func (v *ClusterClient) GetClusterKvPairs(provider, cluster, kvpair string) (ClusterKvPairs, error) {
	//Construct key and tag to select entry
	key := ClusterKvPairsKey{
		ClusterProviderName: provider,
		ClusterName:         cluster,
		ClusterKvPairsName:  kvpair,
	}

	value, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
	if err != nil {
		return ClusterKvPairs{}, pkgerrors.Wrap(err, "Get Cluster")
	}

	//value is a byte array
	if value != nil {
		ckvp := ClusterKvPairs{}
		err = db.DBconn.Unmarshal(value[0], &ckvp)
		if err != nil {
			return ClusterKvPairs{}, pkgerrors.Wrap(err, "Unmarshalling Value")
		}
		return ckvp, nil
	}

	return ClusterKvPairs{}, pkgerrors.New("Error getting Cluster")
}

// GetAllClusterKvPairs returns the Cluster Kv Pairs for corresponding provider and cluster
func (v *ClusterClient) GetAllClusterKvPairs(provider, cluster string) ([]ClusterKvPairs, error) {
	//Construct key and tag to select the entry
	key := ClusterKvPairsKey{
		ClusterProviderName: provider,
		ClusterName:         cluster,
		ClusterKvPairsName:  "",
	}

	values, err := db.DBconn.Find(v.db.storeName, key, v.db.tagMeta)
	if err != nil {
		return []ClusterKvPairs{}, pkgerrors.Wrap(err, "Get Cluster KV Pairs")
	}

	var resp []ClusterKvPairs

	for _, value := range values {
		cp := ClusterKvPairs{}
		err = db.DBconn.Unmarshal(value, &cp)
		if err != nil {
			return []ClusterKvPairs{}, pkgerrors.Wrap(err, "Unmarshalling Value")
		}
		resp = append(resp, cp)
	}

	return resp, nil
}

// DeleteClusterKvPairs the  ClusterKvPairs from database
func (v *ClusterClient) DeleteClusterKvPairs(provider, cluster, kvpair string) error {
	//Construct key and tag to select entry
	key := ClusterKvPairsKey{
		ClusterProviderName: provider,
		ClusterName:         cluster,
		ClusterKvPairsName:  kvpair,
	}

	err := db.DBconn.Remove(v.db.storeName, key)
	if err != nil {
		return pkgerrors.Wrap(err, "Delete ClusterKvPairs Entry;")
	}

	return nil
}