aboutsummaryrefslogtreecommitdiffstats
path: root/src/dcm/pkg/module/cluster.go
blob: 6ad46404552c9bab369995478850e7e1e56131b6 (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
/*
* 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 module

import (
	"encoding/base64"
	"encoding/json"
	"strings"

	clm "github.com/onap/multicloud-k8s/src/clm/pkg/cluster"
	rb "github.com/onap/multicloud-k8s/src/monitor/pkg/apis/k8splugin/v1alpha1"
	log "github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/logutils"
	pkgerrors "github.com/pkg/errors"
	"gopkg.in/yaml.v2"
)

// Cluster contains the parameters needed for a Cluster
type Cluster struct {
	MetaData      ClusterMeta `json:"metadata"`
	Specification ClusterSpec `json:"spec"`
}

type ClusterMeta struct {
	ClusterReference string `json:"name"`
	Description      string `json:"description"`
	UserData1        string `json:"userData1"`
	UserData2        string `json:"userData2"`
}

type ClusterSpec struct {
	ClusterProvider string `json:"cluster-provider"`
	ClusterName     string `json:"cluster-name"`
	LoadBalancerIP  string `json:"loadbalancer-ip"`
	Certificate     string `json:"certificate"`
}

type ClusterKey struct {
	Project          string `json:"project"`
	LogicalCloudName string `json:"logical-cloud-name"`
	ClusterReference string `json:"clname"`
}

type KubeConfig struct {
	ApiVersion     string            `yaml:"apiVersion"`
	Kind           string            `yaml:"kind"`
	Clusters       []KubeCluster     `yaml:"clusters"`
	Contexts       []KubeContext     `yaml:"contexts"`
	CurrentContext string            `yaml:"current-context"`
	Preferences    map[string]string `yaml:"preferences"`
	Users          []KubeUser        `yaml:"users"`
}

type KubeCluster struct {
	ClusterDef  KubeClusterDef `yaml:"cluster"`
	ClusterName string         `yaml:"name"`
}

type KubeClusterDef struct {
	CertificateAuthorityData string `yaml:"certificate-authority-data"`
	Server                   string `yaml:"server"`
}

type KubeContext struct {
	ContextDef  KubeContextDef `yaml:"context"`
	ContextName string         `yaml:"name"`
}

type KubeContextDef struct {
	Cluster   string `yaml:"cluster"`
	Namespace string `yaml:"namespace,omitempty"`
	User      string `yaml:"user"`
}

type KubeUser struct {
	UserName string      `yaml:"name"`
	UserDef  KubeUserDef `yaml:"user"`
}

type KubeUserDef struct {
	ClientCertificateData string `yaml:"client-certificate-data"`
	ClientKeyData         string `yaml:"client-key-data"`
	// client-certificate and client-key are NOT implemented
}

// ClusterManager is an interface that exposes the connection
// functionality
type ClusterManager interface {
	CreateCluster(project, logicalCloud string, c Cluster) (Cluster, error)
	GetCluster(project, logicalCloud, name string) (Cluster, error)
	GetAllClusters(project, logicalCloud string) ([]Cluster, error)
	DeleteCluster(project, logicalCloud, name string) error
	UpdateCluster(project, logicalCloud, name string, c Cluster) (Cluster, error)
	GetClusterConfig(project, logicalcloud, name string) (string, error)
}

// ClusterClient implements the ClusterManager
// It will also be used to maintain some localized state
type ClusterClient struct {
	storeName string
	tagMeta   string
	util      Utility
}

// ClusterClient returns an instance of the ClusterClient
// which implements the ClusterManager
func NewClusterClient() *ClusterClient {
	service := DBService{}
	return &ClusterClient{
		storeName: "orchestrator",
		tagMeta:   "cluster",
		util:      service,
	}
}

// Create entry for the cluster reference resource in the database
func (v *ClusterClient) CreateCluster(project, logicalCloud string, c Cluster) (Cluster, error) {

	//Construct key consisting of name
	key := ClusterKey{
		Project:          project,
		LogicalCloudName: logicalCloud,
		ClusterReference: c.MetaData.ClusterReference,
	}

	//Check if project exists
	err := v.util.CheckProject(project)
	if err != nil {
		return Cluster{}, pkgerrors.New("Unable to find the project")
	}
	//check if logical cloud exists
	err = v.util.CheckLogicalCloud(project, logicalCloud)
	if err != nil {
		return Cluster{}, pkgerrors.New("Unable to find the logical cloud")
	}
	//Check if this Cluster reference already exists
	_, err = v.GetCluster(project, logicalCloud, c.MetaData.ClusterReference)
	if err == nil {
		return Cluster{}, pkgerrors.New("Cluster reference already exists")
	}

	err = v.util.DBInsert(v.storeName, key, nil, v.tagMeta, c)
	if err != nil {
		return Cluster{}, pkgerrors.Wrap(err, "Creating DB Entry")
	}

	return c, nil
}

// Get returns  Cluster for corresponding cluster reference
func (v *ClusterClient) GetCluster(project, logicalCloud, clusterReference string) (Cluster, error) {

	//Construct the composite key to select the entry
	key := ClusterKey{
		Project:          project,
		LogicalCloudName: logicalCloud,
		ClusterReference: clusterReference,
	}

	value, err := v.util.DBFind(v.storeName, key, v.tagMeta)
	if err != nil {
		return Cluster{}, pkgerrors.Wrap(err, "Get Cluster reference")
	}

	//value is a byte array
	if value != nil {
		cl := Cluster{}
		err = v.util.DBUnmarshal(value[0], &cl)
		if err != nil {
			return Cluster{}, pkgerrors.Wrap(err, "Unmarshaling value")
		}
		return cl, nil
	}

	return Cluster{}, pkgerrors.New("Cluster Reference does not exist")
}

// GetAll returns all cluster references in the logical cloud
func (v *ClusterClient) GetAllClusters(project, logicalCloud string) ([]Cluster, error) {
	//Construct the composite key to select clusters
	key := ClusterKey{
		Project:          project,
		LogicalCloudName: logicalCloud,
		ClusterReference: "",
	}
	var resp []Cluster
	values, err := v.util.DBFind(v.storeName, key, v.tagMeta)
	if err != nil {
		return []Cluster{}, pkgerrors.Wrap(err, "Get All Cluster references")
	}
	if len(values) == 0 {
		return []Cluster{}, pkgerrors.New("No Cluster References associated")
	}

	for _, value := range values {
		cl := Cluster{}
		err = v.util.DBUnmarshal(value, &cl)
		if err != nil {
			return []Cluster{}, pkgerrors.Wrap(err, "Unmarshaling values")
		}
		resp = append(resp, cl)
	}

	return resp, nil
}

// Delete the Cluster reference entry from database
func (v *ClusterClient) DeleteCluster(project, logicalCloud, clusterReference string) error {
	//Construct the composite key to select the entry
	key := ClusterKey{
		Project:          project,
		LogicalCloudName: logicalCloud,
		ClusterReference: clusterReference,
	}
	err := v.util.DBRemove(v.storeName, key)
	if err != nil {
		return pkgerrors.Wrap(err, "Delete Cluster Reference")
	}
	return nil
}

// Update an entry for the Cluster reference in the database
func (v *ClusterClient) UpdateCluster(project, logicalCloud, clusterReference string, c Cluster) (Cluster, error) {

	key := ClusterKey{
		Project:          project,
		LogicalCloudName: logicalCloud,
		ClusterReference: clusterReference,
	}

	//Check for name mismatch in cluster reference
	if c.MetaData.ClusterReference != clusterReference {
		return Cluster{}, pkgerrors.New("Cluster Reference mismatch")
	}
	//Check if this Cluster reference exists
	_, err := v.GetCluster(project, logicalCloud, clusterReference)
	if err != nil {
		return Cluster{}, pkgerrors.New("Cluster Reference does not exist")
	}
	err = v.util.DBInsert(v.storeName, key, nil, v.tagMeta, c)
	if err != nil {
		return Cluster{}, pkgerrors.Wrap(err, "Updating DB Entry")
	}
	return c, nil
}

// Get returns Cluster's kubeconfig for corresponding cluster reference
func (v *ClusterClient) GetClusterConfig(project, logicalCloud, clusterReference string) (string, error) {
	lcClient := NewLogicalCloudClient()
	lckey := LogicalCloudKey{
		Project:          project,
		LogicalCloudName: logicalCloud,
	}
	context, ctxVal, err := lcClient.util.GetLogicalCloudContext(lcClient.storeName, lckey, lcClient.tagMeta, project, logicalCloud)
	if err != nil {
		return "", pkgerrors.Wrap(err, "Error getting logical cloud context.")
	}
	if ctxVal == "" {
		return "", pkgerrors.New("Logical Cloud hasn't been applied yet")
	}

	// get logical cloud resource
	lc, err := lcClient.Get(project, logicalCloud)
	if err != nil {
		return "", pkgerrors.Wrap(err, "Failed getting logical cloud")
	}
	// get user's private key
	privateKeyData, err := v.util.DBFind(v.storeName, lckey, "privatekey")
	if err != nil {
		return "", pkgerrors.Wrap(err, "Failed getting private key from logical cloud")
	}

	// get cluster from dcm (need provider/name)
	cluster, err := v.GetCluster(project, logicalCloud, clusterReference)
	if err != nil {
		return "", pkgerrors.Wrap(err, "Failed getting cluster")
	}

	// before attempting to generate a kubeconfig,
	// check if certificate has been issued and copy it from etcd to mongodb
	if cluster.Specification.Certificate == "" {
		log.Info("Certificate not yet in MongoDB, checking etcd.", log.Fields{})

		// access etcd
		clusterName := strings.Join([]string{cluster.Specification.ClusterProvider, "+", cluster.Specification.ClusterName}, "")

		// get the app context handle for the status of this cluster (which should contain the certificate inside, if already issued)
		statusHandle, err := context.GetClusterStatusHandle("logical-cloud", clusterName)

		if err != nil {
			return "", pkgerrors.New("The cluster doesn't contain status, please check if all services are up and running.")
		}
		statusRaw, err := context.GetValue(statusHandle)
		if err != nil {
			return "", pkgerrors.Wrap(err, "An error occurred while reading the cluster status.")
		}

		var rbstatus rb.ResourceBundleStatus
		err = json.Unmarshal([]byte(statusRaw.(string)), &rbstatus)
		if err != nil {
			return "", pkgerrors.Wrap(err, "An error occurred while parsing the cluster status.")
		}

		if len(rbstatus.CsrStatuses) == 0 {
			return "", pkgerrors.New("The certificate for this cluster hasn't been issued yet. Please try later.")
		}

		// validate that we indeed obtained a certificate before persisting it in the database:
		approved := false
		for _, c := range rbstatus.CsrStatuses[0].Status.Conditions {
			if c.Type == "Denied" {
				return "", pkgerrors.Wrap(err, "Certificate was denied!")
			}
			if c.Type == "Failed" {
				return "", pkgerrors.Wrap(err, "Certificate issue failed.")
			}
			if c.Type == "Approved" {
				approved = true
			}
		}
		if approved {
			//just double-check certificate field contents aren't empty:
			cert := rbstatus.CsrStatuses[0].Status.Certificate
			if len(cert) > 0 {
				cluster.Specification.Certificate = base64.StdEncoding.EncodeToString([]byte(cert))
			} else {
				return "", pkgerrors.Wrap(err, "Certificate issued was invalid.")
			}
		}

		// copy key to MongoDB
		// func (v *ClusterClient)
		// UpdateCluster(project, logicalCloud, clusterReference string, c Cluster) (Cluster, error) {
		_, err = v.UpdateCluster(project, logicalCloud, clusterReference, cluster)
		if err != nil {
			return "", pkgerrors.Wrap(err, "An error occurred while storing the certificate.")
		}
	} else {
		// certificate is already in MongoDB so just hand it over to create the API response
		log.Info("Certificate already in MongoDB, pass it to API.", log.Fields{})
	}

	// contact clm about admins cluster kubeconfig (to retrieve CA cert)
	clusterContent, err := clm.NewClusterClient().GetClusterContent(cluster.Specification.ClusterProvider, cluster.Specification.ClusterName)
	if err != nil {
		return "", pkgerrors.Wrap(err, "Failed getting cluster content from CLM")
	}
	adminConfig, err := base64.StdEncoding.DecodeString(clusterContent.Kubeconfig)
	if err != nil {
		return "", pkgerrors.Wrap(err, "Failed decoding CLM kubeconfig from base64")
	}

	// unmarshall clm kubeconfig into struct
	adminKubeConfig := KubeConfig{}
	err = yaml.Unmarshal(adminConfig, &adminKubeConfig)
	if err != nil {
		return "", pkgerrors.Wrap(err, "Failed parsing CLM kubeconfig yaml")
	}

	// all data needed for final kubeconfig:
	privateKey := string(privateKeyData[0])
	signedCert := cluster.Specification.Certificate
	clusterCert := adminKubeConfig.Clusters[0].ClusterDef.CertificateAuthorityData
	clusterAddr := adminKubeConfig.Clusters[0].ClusterDef.Server
	namespace := lc.Specification.NameSpace
	userName := lc.Specification.User.UserName
	contextName := userName + "@" + clusterReference

	kubeconfig := KubeConfig{
		ApiVersion: "v1",
		Kind:       "Config",
		Clusters: []KubeCluster{
			KubeCluster{
				ClusterName: clusterReference,
				ClusterDef: KubeClusterDef{
					CertificateAuthorityData: clusterCert,
					Server:                   clusterAddr,
				},
			},
		},
		Contexts: []KubeContext{
			KubeContext{
				ContextName: contextName,
				ContextDef: KubeContextDef{
					Cluster:   clusterReference,
					Namespace: namespace,
					User:      userName,
				},
			},
		},
		CurrentContext: contextName,
		Preferences:    map[string]string{},
		Users: []KubeUser{
			KubeUser{
				UserName: userName,
				UserDef: KubeUserDef{
					ClientCertificateData: signedCert,
					ClientKeyData:         privateKey,
				},
			},
		},
	}

	yaml, err := yaml.Marshal(&kubeconfig)
	if err != nil {
		return "", pkgerrors.Wrap(err, "Failed marshaling user kubeconfig into yaml")
	}

	return string(yaml), nil
}