summaryrefslogtreecommitdiffstats
path: root/src/k8splugin/api/handler.go
blob: 4c49ba78009cd148d9a0e0766399ad76f18fb220 (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
/*
Copyright 2018 Intel Corporation.
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 api

import (
	"encoding/json"
	"errors"
	"log"
	"net/http"
	"os"
	"strings"

	"github.com/gorilla/mux"
	pkgerrors "github.com/pkg/errors"
	"k8s.io/client-go/kubernetes"

	"k8splugin/csar"
	"k8splugin/db"
	"k8splugin/krd"
)

//TODO: Separate the http handler code and backend code out
var storeName = "rbinst"
var tagData = "data"

// GetVNFClient retrieves the client used to communicate with a Kubernetes Cluster
var GetVNFClient = func(kubeConfigPath string) (kubernetes.Clientset, error) {
	client, err := krd.GetKubeClient(kubeConfigPath)
	if err != nil {
		return client, err
	}
	return client, nil
}

func validateBody(body interface{}) error {
	switch b := body.(type) {
	case CreateVnfRequest:
		if b.CloudRegionID == "" {
			werr := pkgerrors.Wrap(errors.New("Invalid/Missing CloudRegionID in POST request"), "CreateVnfRequest bad request")
			return werr
		}
		if b.CsarID == "" {
			werr := pkgerrors.Wrap(errors.New("Invalid/Missing CsarID in POST request"), "CreateVnfRequest bad request")
			return werr
		}
		if strings.Contains(b.CloudRegionID, "|") || strings.Contains(b.Namespace, "|") {
			werr := pkgerrors.Wrap(errors.New("Character \"|\" not allowed in CSAR ID"), "CreateVnfRequest bad request")
			return werr
		}
	case UpdateVnfRequest:
		if b.CloudRegionID == "" || b.CsarID == "" {
			werr := pkgerrors.Wrap(errors.New("Invalid/Missing Data in PUT request"), "UpdateVnfRequest bad request")
			return werr
		}
	}
	return nil
}

// CreateHandler is the POST method creates a new VNF instance resource.
func CreateHandler(w http.ResponseWriter, r *http.Request) {
	var resource CreateVnfRequest

	if r.Body == nil {
		http.Error(w, "Body empty", http.StatusBadRequest)
		return
	}

	err := json.NewDecoder(r.Body).Decode(&resource)
	if err != nil {
		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
		return
	}

	err = validateBody(resource)
	if err != nil {
		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
		return
	}

	// (TODO): Read kubeconfig for specific Cloud Region from local file system
	// if present or download it from AAI
	// err := DownloadKubeConfigFromAAI(resource.CloudRegionID, os.Getenv("KUBE_CONFIG_DIR")
	kubeclient, err := GetVNFClient(os.Getenv("KUBE_CONFIG_DIR") + "/" + resource.CloudRegionID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	/*
		uuid,
		{
			"deployment": ["cloud1-default-uuid-sisedeploy1", "cloud1-default-uuid-sisedeploy2", ... ]
			"service": ["cloud1-default-uuid-sisesvc1", "cloud1-default-uuid-sisesvc2", ... ]
		},
		nil
	*/
	externalVNFID, resourceNameMap, err := csar.CreateVNF(resource.CsarID, resource.CloudRegionID, resource.Namespace, &kubeclient)
	if err != nil {
		werr := pkgerrors.Wrap(err, "Read Kubernetes Data information error")
		http.Error(w, werr.Error(), http.StatusInternalServerError)
		return
	}

	// cloud1-default-uuid
	internalVNFID := resource.CloudRegionID + "-" + resource.Namespace + "-" + externalVNFID

	// Persist in AAI database.
	log.Printf("Cloud Region ID: %s, Namespace: %s, VNF ID: %s ", resource.CloudRegionID, resource.Namespace, externalVNFID)

	// TODO: Uncomment when annotations are done
	// krd.AddNetworkAnnotationsToPod(kubeData, resource.Networks)

	// key: cloud1-default-uuid
	// value: "{"deployment":<>,"service":<>}"
	err = db.DBconn.Create(storeName, internalVNFID, tagData, resourceNameMap)
	if err != nil {
		werr := pkgerrors.Wrap(err, "Create VNF deployment DB error")
		http.Error(w, werr.Error(), http.StatusInternalServerError)
		return
	}

	resp := CreateVnfResponse{
		VNFID:         externalVNFID,
		CloudRegionID: resource.CloudRegionID,
		Namespace:     resource.Namespace,
		VNFComponents: resourceNameMap,
	}

	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusCreated)
	json.NewEncoder(w).Encode(resp)
}

// ListHandler the existing VNF instances created in a given Kubernetes cluster
func ListHandler(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)

	cloudRegionID := vars["cloudRegionID"]
	namespace := vars["namespace"]
	prefix := cloudRegionID + "-" + namespace

	res, err := db.DBconn.ReadAll(storeName, tagData)
	if err != nil {
		http.Error(w, pkgerrors.Wrap(err, "Get VNF list error").Error(),
			http.StatusInternalServerError)
		return
	}

	// TODO: There is an edge case where if namespace is passed but is missing some characters
	// trailing, it will print the result with those excluding characters. This is because of
	// the way I am trimming the Prefix. This fix is needed.

	var editedList []string

	for key, value := range res {
		if len(value) > 0 {
			editedList = append(editedList, strings.TrimPrefix(key, prefix)[1:])
		}
	}

	if len(editedList) == 0 {
		editedList = append(editedList, "")
	}

	resp := ListVnfsResponse{
		VNFs: editedList,
	}

	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusOK)
	json.NewEncoder(w).Encode(resp)
}

// DeleteHandler method terminates an individual VNF instance.
func DeleteHandler(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)

	cloudRegionID := vars["cloudRegionID"] // cloud1
	namespace := vars["namespace"]         // default
	externalVNFID := vars["externalVNFID"] // uuid

	// cloud1-default-uuid
	internalVNFID := cloudRegionID + "-" + namespace + "-" + externalVNFID

	// key: cloud1-default-uuid
	// value: "{"deployment":<>,"service":<>}"
	res, err := db.DBconn.Read(storeName, internalVNFID, tagData)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	/*
		{
			"deployment": ["cloud1-default-uuid-sisedeploy1", "cloud1-default-uuid-sisedeploy2", ... ]
			"service": ["cloud1-default-uuid-sisesvc1", "cloud1-default-uuid-sisesvc2", ... ]
		},
	*/
	data := make(map[string][]string)
	err = db.DBconn.Unmarshal(res, &data)
	if err != nil {
		werr := pkgerrors.Wrap(err, "Unmarshal VNF error")
		http.Error(w, werr.Error(), http.StatusInternalServerError)
		return
	}

	// (TODO): Read kubeconfig for specific Cloud Region from local file system
	// if present or download it from AAI
	// err := DownloadKubeConfigFromAAI(resource.CloudRegionID, os.Getenv("KUBE_CONFIG_DIR")
	kubeclient, err := GetVNFClient(os.Getenv("KUBE_CONFIG_DIR") + "/" + cloudRegionID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	err = csar.DestroyVNF(data, namespace, &kubeclient)
	if err != nil {
		werr := pkgerrors.Wrap(err, "Delete VNF error")
		http.Error(w, werr.Error(), http.StatusInternalServerError)
		return
	}

	err = db.DBconn.Delete(storeName, internalVNFID, tagData)
	if err != nil {
		werr := pkgerrors.Wrap(err, "Delete VNF db record error")
		http.Error(w, werr.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusAccepted)
}

// // UpdateHandler method to update a VNF instance.
// func UpdateHandler(w http.ResponseWriter, r *http.Request) {
// 	vars := mux.Vars(r)
// 	id := vars["vnfInstanceId"]

// 	var resource UpdateVnfRequest

// 	if r.Body == nil {
// 		http.Error(w, "Body empty", http.StatusBadRequest)
// 		return
// 	}

// 	err := json.NewDecoder(r.Body).Decode(&resource)
// 	if err != nil {
// 		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
// 		return
// 	}

// 	err = validateBody(resource)
// 	if err != nil {
// 		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
// 		return
// 	}

// 	kubeData, err := utils.ReadCSARFromFileSystem(resource.CsarID)

// 	if kubeData.Deployment == nil {
// 		werr := pkgerrors.Wrap(err, "Update VNF deployment error")
// 		http.Error(w, werr.Error(), http.StatusInternalServerError)
// 		return
// 	}
// 	kubeData.Deployment.SetUID(types.UID(id))

// 	if err != nil {
// 		werr := pkgerrors.Wrap(err, "Update VNF deployment information error")
// 		http.Error(w, werr.Error(), http.StatusInternalServerError)
// 		return
// 	}

// 	// (TODO): Read kubeconfig for specific Cloud Region from local file system
// 	// if present or download it from AAI
// 	s, err := NewVNFInstanceService("../kubeconfig/config")
// 	if err != nil {
// 		http.Error(w, err.Error(), http.StatusInternalServerError)
// 		return
// 	}

// 	err = s.Client.UpdateDeployment(kubeData.Deployment, resource.Namespace)
// 	if err != nil {
// 		werr := pkgerrors.Wrap(err, "Update VNF error")

// 		http.Error(w, werr.Error(), http.StatusInternalServerError)
// 		return
// 	}

// 	resp := UpdateVnfResponse{
// 		DeploymentID: id,
// 	}

// 	w.Header().Set("Content-Type", "application/json")
// 	w.WriteHeader(http.StatusCreated)

// 	err = json.NewEncoder(w).Encode(resp)
// 	if err != nil {
// 		werr := pkgerrors.Wrap(err, "Parsing output of new VNF error")
// 		http.Error(w, werr.Error(), http.StatusInternalServerError)
// 	}
// }

// GetHandler retrieves information about a VNF instance by reading an individual VNF instance resource.
func GetHandler(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)

	cloudRegionID := vars["cloudRegionID"] // cloud1
	namespace := vars["namespace"]         // default
	externalVNFID := vars["externalVNFID"] // uuid

	// cloud1-default-uuid
	internalVNFID := cloudRegionID + "-" + namespace + "-" + externalVNFID

	// key: cloud1-default-uuid
	// value: "{"deployment":<>,"service":<>}"
	res, err := db.DBconn.Read(storeName, internalVNFID, tagData)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	/*
		{
			"deployment": ["cloud1-default-uuid-sisedeploy1", "cloud1-default-uuid-sisedeploy2", ... ]
			"service": ["cloud1-default-uuid-sisesvc1", "cloud1-default-uuid-sisesvc2", ... ]
		},
	*/
	data := make(map[string][]string)
	err = db.DBconn.Unmarshal(res, &data)
	if err != nil {
		werr := pkgerrors.Wrap(err, "Unmarshal VNF error")
		http.Error(w, werr.Error(), http.StatusInternalServerError)
		return
	}

	resp := GetVnfResponse{
		VNFID:         externalVNFID,
		CloudRegionID: cloudRegionID,
		Namespace:     namespace,
		VNFComponents: data,
	}

	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusOK)
	json.NewEncoder(w).Encode(resp)
}