aboutsummaryrefslogtreecommitdiffstats
path: root/src/k8splugin/internal/rb/profile.go
blob: 7d3902f2d807f530e34418ae56c1afdc440c2c5e (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
/*
 * Copyright 2018 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 rb

import (
	"bytes"
	"encoding/base64"
	"encoding/json"
	"path/filepath"

	"k8splugin/internal/db"
	"k8splugin/internal/helm"

	pkgerrors "github.com/pkg/errors"
)

// Profile contains the parameters needed for resource bundle (rb) profiles
// It implements the interface for managing the profiles
type Profile struct {
	RBName            string            `json:"rb-name"`
	RBVersion         string            `json:"rb-version"`
	ProfileName       string            `json:"profile-name"`
	ReleaseName       string            `json:"release-name"`
	Namespace         string            `json:"namespace"`
	KubernetesVersion string            `json:"kubernetes-version"`
	Labels            map[string]string `json:"labels"`
}

// ProfileManager is an interface exposes the resource bundle profile functionality
type ProfileManager interface {
	Create(def Profile) (Profile, error)
	Get(rbName, rbVersion, prName string) (Profile, error)
	Delete(rbName, rbVersion, prName string) error
	Upload(rbName, rbVersion, prName string, inp []byte) error
}

type ProfileKey struct {
	RBName      string `json:"rb-name"`
	RBVersion   string `json:"rb-version"`
	ProfileName string `json:"profile-name"`
}

// We will use json marshalling to convert to string to
// preserve the underlying structure.
func (dk ProfileKey) String() string {
	out, err := json.Marshal(dk)
	if err != nil {
		return ""
	}

	return string(out)
}

// ProfileClient implements the ProfileManager
// It will also be used to maintain some localized state
type ProfileClient struct {
	storeName           string
	tagMeta, tagContent string
	manifestName        string
}

// NewProfileClient returns an instance of the ProfileClient
// which implements the ProfileManager
func NewProfileClient() *ProfileClient {
	return &ProfileClient{
		storeName:    "rbdef",
		tagMeta:      "metadata",
		tagContent:   "content",
		manifestName: "manifest.yaml",
	}
}

// Create an entry for the resource bundle profile in the database
func (v *ProfileClient) Create(p Profile) (Profile, error) {

	// Name is required
	if p.ProfileName == "" {
		return Profile{}, pkgerrors.New("Name is required for Resource Bundle Profile")
	}

	//Check if profile already exists
	_, err := v.Get(p.RBName, p.RBVersion, p.ProfileName)
	if err == nil {
		return Profile{}, pkgerrors.New("Profile already exists for this Definition")
	}

	//Check if provided resource bundle information is valid
	_, err = NewDefinitionClient().Get(p.RBName, p.RBVersion)
	if err != nil {
		return Profile{}, pkgerrors.Errorf("Invalid Resource Bundle ID provided: %s", err.Error())
	}

	//If release-name is not provided, we store name instead
	if p.ReleaseName == "" {
		p.ReleaseName = p.ProfileName
	}

	key := ProfileKey{
		RBName:      p.RBName,
		RBVersion:   p.RBVersion,
		ProfileName: p.ProfileName,
	}

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

	return p, nil
}

// Get returns the Resource Bundle Profile for corresponding ID
func (v *ProfileClient) Get(rbName, rbVersion, prName string) (Profile, error) {
	key := ProfileKey{
		RBName:      rbName,
		RBVersion:   rbVersion,
		ProfileName: prName,
	}
	value, err := db.DBconn.Read(v.storeName, key, v.tagMeta)
	if err != nil {
		return Profile{}, pkgerrors.Wrap(err, "Get Resource Bundle Profile")
	}

	//value is a byte array
	if value != nil {
		pr := Profile{}
		err = db.DBconn.Unmarshal(value, &pr)
		if err != nil {
			return Profile{}, pkgerrors.Wrap(err, "Unmarshaling Profile Value")
		}
		return pr, nil
	}

	return Profile{}, pkgerrors.New("Error getting Resource Bundle Profile")
}

// Delete the Resource Bundle Profile from database
func (v *ProfileClient) Delete(rbName, rbVersion, prName string) error {
	key := ProfileKey{
		RBName:      rbName,
		RBVersion:   rbVersion,
		ProfileName: prName,
	}
	err := db.DBconn.Delete(v.storeName, key, v.tagMeta)
	if err != nil {
		return pkgerrors.Wrap(err, "Delete Resource Bundle Profile")
	}

	err = db.DBconn.Delete(v.storeName, key, v.tagContent)
	if err != nil {
		return pkgerrors.Wrap(err, "Delete Resource Bundle Profile Content")
	}

	return nil
}

// Upload the contents of resource bundle into database
func (v *ProfileClient) Upload(rbName, rbVersion, prName string, inp []byte) error {

	//ignore the returned data here.
	_, err := v.Get(rbName, rbVersion, prName)
	if err != nil {
		return pkgerrors.Errorf("Invalid Profile Name provided %s", err.Error())
	}

	err = isTarGz(bytes.NewBuffer(inp))
	if err != nil {
		return pkgerrors.Errorf("Error in file format %s", err.Error())
	}

	key := ProfileKey{
		RBName:      rbName,
		RBVersion:   rbVersion,
		ProfileName: prName,
	}
	//Encode given byte stream to text for storage
	encodedStr := base64.StdEncoding.EncodeToString(inp)
	err = db.DBconn.Create(v.storeName, key, v.tagContent, encodedStr)
	if err != nil {
		return pkgerrors.Errorf("Error uploading data to db %s", err.Error())
	}

	return nil
}

// Download the contents of the resource bundle profile from DB
// Returns a byte array of the contents which is used by the
// ExtractTarBall code to create the folder structure on disk
func (v *ProfileClient) Download(rbName, rbVersion, prName string) ([]byte, error) {

	//ignore the returned data here
	//Check if id is valid
	_, err := v.Get(rbName, rbVersion, prName)
	if err != nil {
		return nil, pkgerrors.Errorf("Invalid Profile Name provided: %s", err.Error())
	}

	key := ProfileKey{
		RBName:      rbName,
		RBVersion:   rbVersion,
		ProfileName: prName,
	}
	value, err := db.DBconn.Read(v.storeName, key, v.tagContent)
	if err != nil {
		return nil, pkgerrors.Wrap(err, "Get Resource Bundle Profile content")
	}

	if value != nil {
		//Decode the string from base64
		out, err := base64.StdEncoding.DecodeString(string(value))
		if err != nil {
			return nil, pkgerrors.Wrap(err, "Decode base64 string")
		}

		if out != nil && len(out) != 0 {
			return out, nil
		}
	}
	return nil, pkgerrors.New("Error downloading Profile content")
}

//Resolve returns the path where the helm chart merged with
//configuration overrides resides.
func (v *ProfileClient) Resolve(rbName string, rbVersion string,
	profileName string, values []string) ([]helm.KubernetesResourceTemplate, error) {

	var sortedTemplates []helm.KubernetesResourceTemplate

	//Download and process the profile first
	//If everything seems okay, then download the definition
	prData, err := v.Download(rbName, rbVersion, profileName)
	if err != nil {
		return sortedTemplates, pkgerrors.Wrap(err, "Downloading Profile")
	}

	prPath, err := ExtractTarBall(bytes.NewBuffer(prData))
	if err != nil {
		return sortedTemplates, pkgerrors.Wrap(err, "Extracting Profile Content")
	}

	prYamlClient, err := ProcessProfileYaml(prPath, v.manifestName)
	if err != nil {
		return sortedTemplates, pkgerrors.Wrap(err, "Processing Profile Manifest")
	}

	definitionClient := NewDefinitionClient()

	definition, err := definitionClient.Get(rbName, rbVersion)
	if err != nil {
		return sortedTemplates, pkgerrors.Wrap(err, "Getting Definition Metadata")
	}

	defData, err := definitionClient.Download(rbName, rbVersion)
	if err != nil {
		return sortedTemplates, pkgerrors.Wrap(err, "Downloading Definition")
	}

	chartBasePath, err := ExtractTarBall(bytes.NewBuffer(defData))
	if err != nil {
		return sortedTemplates, pkgerrors.Wrap(err, "Extracting Definition Charts")
	}

	//Get the definition ID and download its contents
	profile, err := v.Get(rbName, rbVersion, profileName)
	if err != nil {
		return sortedTemplates, pkgerrors.Wrap(err, "Getting Profile")
	}

	//Copy the profile configresources to the chart locations
	//Corresponds to the following from the profile yaml
	// configresource:
	// - filepath: config.yaml
	//   chartpath: chart/config/resources/config.yaml
	err = prYamlClient.CopyConfigurationOverrides(chartBasePath)
	if err != nil {
		return sortedTemplates, pkgerrors.Wrap(err, "Copying configresources to chart")
	}

	helmClient := helm.NewTemplateClient(profile.KubernetesVersion,
		profile.Namespace,
		profile.ReleaseName)

	chartPath := filepath.Join(chartBasePath, definition.ChartName)
	sortedTemplates, err = helmClient.GenerateKubernetesArtifacts(chartPath,
		[]string{prYamlClient.GetValues()},
		values)
	if err != nil {
		return sortedTemplates, pkgerrors.Wrap(err, "Generate final k8s yaml")
	}

	return sortedTemplates, nil
}