|
1
|
|
|
"""Main module of kytos/mef_eline Kytos Network Application. |
|
2
|
|
|
|
|
3
|
|
|
NApp to provision circuits from user request. |
|
4
|
|
|
""" |
|
5
|
1 |
|
from threading import Lock |
|
6
|
|
|
|
|
7
|
1 |
|
from flask import jsonify, request |
|
8
|
1 |
|
from werkzeug.exceptions import (BadRequest, Conflict, Forbidden, |
|
9
|
1 |
|
MethodNotAllowed, NotFound, |
|
10
|
1 |
|
UnsupportedMediaType) |
|
11
|
1 |
|
|
|
12
|
1 |
|
from kytos.core import KytosNApp, log, rest |
|
13
|
1 |
|
from kytos.core.events import KytosEvent |
|
14
|
1 |
|
from kytos.core.helpers import listen_to |
|
15
|
|
|
from kytos.core.interface import TAG, UNI |
|
16
|
|
|
from kytos.core.link import Link |
|
17
|
1 |
|
from napps.kytos.mef_eline import settings |
|
18
|
|
|
from napps.kytos.mef_eline.models import EVC, DynamicPathManager, Path |
|
19
|
|
|
from napps.kytos.mef_eline.scheduler import CircuitSchedule, Scheduler |
|
20
|
|
|
from napps.kytos.mef_eline.storehouse import StoreHouse |
|
21
|
|
|
from napps.kytos.mef_eline.utils import emit_event |
|
22
|
|
|
|
|
23
|
1 |
|
|
|
24
|
|
|
class Main(KytosNApp): |
|
25
|
|
|
"""Main class of amlight/mef_eline NApp. |
|
26
|
|
|
|
|
27
|
|
|
This class is the entry point for this napp. |
|
28
|
|
|
""" |
|
29
|
|
|
|
|
30
|
|
|
def setup(self): |
|
31
|
|
|
"""Replace the '__init__' method for the KytosNApp subclass. |
|
32
|
1 |
|
|
|
33
|
|
|
The setup method is automatically called by the controller when your |
|
34
|
|
|
application is loaded. |
|
35
|
1 |
|
|
|
36
|
|
|
So, if you have any setup routine, insert it here. |
|
37
|
|
|
""" |
|
38
|
1 |
|
# object used to scheduler circuit events |
|
39
|
|
|
self.sched = Scheduler() |
|
40
|
1 |
|
|
|
41
|
|
|
# object to save and load circuits |
|
42
|
|
|
self.storehouse = StoreHouse(self.controller) |
|
43
|
1 |
|
|
|
44
|
|
|
# set the controller that will manager the dynamic paths |
|
45
|
|
|
DynamicPathManager.set_controller(self.controller) |
|
46
|
|
|
|
|
47
|
|
|
# dictionary of EVCs created. It acts as a circuit buffer. |
|
48
|
|
|
# Every create/update/delete must be synced to storehouse. |
|
49
|
1 |
|
self.circuits = {} |
|
50
|
|
|
|
|
51
|
|
|
# dictionary of EVCs by interface |
|
52
|
1 |
|
self._circuits_by_interface = {} |
|
53
|
1 |
|
|
|
54
|
1 |
|
self._lock = Lock() |
|
55
|
|
|
|
|
56
|
1 |
|
self.execute_as_loop(settings.DEPLOY_EVCS_INTERVAL) |
|
57
|
|
|
self.load_all_evcs() |
|
58
|
1 |
|
|
|
59
|
|
|
def execute(self): |
|
60
|
|
|
"""Execute once when the napp is running.""" |
|
61
|
1 |
|
for circuit in tuple(self.circuits.values()): |
|
62
|
|
|
if circuit.is_enabled() and not circuit.is_active(): |
|
63
|
1 |
|
with circuit.lock: |
|
64
|
1 |
|
circuit.deploy() |
|
65
|
1 |
|
|
|
66
|
|
|
def shutdown(self): |
|
67
|
1 |
|
"""Execute when your napp is unloaded. |
|
68
|
1 |
|
|
|
69
|
|
|
If you have some cleanup procedure, insert it here. |
|
70
|
1 |
|
""" |
|
71
|
|
|
|
|
72
|
1 |
|
@rest('/v2/evc/', methods=['GET']) |
|
73
|
|
|
def list_circuits(self): |
|
74
|
|
|
"""Endpoint to return circuits stored. |
|
75
|
|
|
|
|
76
|
|
|
If archived is set to True return all circuits, else only the ones |
|
77
|
|
|
not archived. |
|
78
|
|
|
""" |
|
79
|
|
|
log.debug('list_circuits /v2/evc') |
|
80
|
|
|
archived = request.args.get('archived', False) |
|
81
|
|
|
circuits = self.storehouse.get_data() |
|
82
|
|
|
if not circuits: |
|
83
|
|
|
return jsonify({}), 200 |
|
84
|
|
|
if archived: |
|
85
|
|
|
return jsonify(circuits), 200 |
|
86
|
|
|
return jsonify({circuit_id: circuit |
|
87
|
|
|
for circuit_id, circuit in circuits.items() |
|
88
|
|
|
if not circuit.get('archived', False)}), 200 |
|
89
|
|
|
|
|
90
|
|
|
@rest('/v2/evc/<circuit_id>', methods=['GET']) |
|
91
|
|
|
def get_circuit(self, circuit_id): |
|
92
|
|
|
"""Endpoint to return a circuit based on id.""" |
|
93
|
|
|
log.debug('get_circuit /v2/evc/%s', circuit_id) |
|
94
|
|
|
circuits = self.storehouse.get_data() |
|
95
|
|
|
|
|
96
|
|
|
try: |
|
97
|
|
|
result = circuits[circuit_id] |
|
98
|
1 |
|
except KeyError: |
|
99
|
|
|
result = f'circuit_id {circuit_id} not found' |
|
100
|
1 |
|
log.debug('get_circuit result %s %s', result, 404) |
|
101
|
1 |
|
raise NotFound(result) |
|
102
|
|
|
|
|
103
|
1 |
|
status = 200 |
|
104
|
1 |
|
log.debug('get_circuit result %s %s', result, status) |
|
105
|
|
|
return jsonify(result), status |
|
106
|
|
|
|
|
107
|
|
|
@rest('/v2/evc/', methods=['POST']) |
|
108
|
|
|
def create_circuit(self): |
|
109
|
1 |
|
"""Try to create a new circuit. |
|
110
|
|
|
|
|
111
|
|
|
Firstly, for EVPL: E-Line NApp verifies if UNI_A's requested C-VID and |
|
112
|
|
|
UNI_Z's requested C-VID are available from the interfaces' pools. This |
|
113
|
1 |
|
is checked when creating the UNI object. |
|
114
|
|
|
|
|
115
|
|
|
Then, E-Line NApp requests a primary and a backup path to the |
|
116
|
1 |
|
Pathfinder NApp using the attributes primary_links and backup_links |
|
117
|
|
|
submitted via REST |
|
118
|
|
|
|
|
119
|
1 |
|
# For each link composing paths in #3: |
|
120
|
1 |
|
# - E-Line NApp requests a S-VID available from the link VLAN pool. |
|
121
|
|
|
# - Using the S-VID obtained, generate abstract flow entries to be |
|
122
|
|
|
# sent to FlowManager |
|
123
|
1 |
|
|
|
124
|
|
|
Push abstract flow entries to FlowManager and FlowManager pushes |
|
125
|
1 |
|
OpenFlow entries to datapaths |
|
126
|
|
|
|
|
127
|
1 |
|
E-Line NApp generates an event to notify all Kytos NApps of a new EVC |
|
128
|
|
|
creation |
|
129
|
1 |
|
|
|
130
|
|
|
Finnaly, notify user of the status of its request. |
|
131
|
|
|
""" |
|
132
|
|
|
# Try to create the circuit object |
|
133
|
|
|
log.debug('create_circuit /v2/evc/') |
|
134
|
|
|
try: |
|
135
|
|
|
data = request.get_json() |
|
136
|
|
|
except BadRequest: |
|
137
|
|
|
result = 'The request body is not a well-formed JSON.' |
|
138
|
|
|
log.debug('create_circuit result %s %s', result, 400) |
|
139
|
|
|
raise BadRequest(result) |
|
140
|
|
|
|
|
141
|
|
|
if data is None: |
|
142
|
|
|
result = 'The request body mimetype is not application/json.' |
|
143
|
|
|
log.debug('create_circuit result %s %s', result, 415) |
|
144
|
|
|
raise UnsupportedMediaType(result) |
|
145
|
|
|
try: |
|
146
|
|
|
evc = self._evc_from_dict(data) |
|
147
|
|
|
except ValueError as exception: |
|
148
|
|
|
log.debug('create_circuit result %s %s', exception, 400) |
|
149
|
|
|
raise BadRequest(str(exception)) |
|
150
|
|
|
|
|
151
|
|
|
# verify duplicated evc |
|
152
|
|
|
if self._is_duplicated_evc(evc): |
|
153
|
|
|
result = "The EVC already exists." |
|
154
|
1 |
|
log.debug('create_circuit result %s %s', result, 409) |
|
155
|
|
|
raise Conflict(result) |
|
156
|
|
|
|
|
157
|
|
|
# store circuit in dictionary |
|
158
|
|
|
self.circuits[evc.id] = evc |
|
159
|
|
|
|
|
160
|
|
|
# save circuit |
|
161
|
|
|
self.storehouse.save_evc(evc) |
|
162
|
|
|
|
|
163
|
|
|
# Schedule the circuit deploy |
|
164
|
|
|
self.sched.add(evc) |
|
165
|
|
|
|
|
166
|
|
|
# Circuit has no schedule, deploy now |
|
167
|
|
|
if not evc.circuit_scheduler: |
|
168
|
|
|
with evc.lock: |
|
169
|
|
|
evc.deploy() |
|
170
|
1 |
|
|
|
171
|
|
|
# Notify users |
|
172
|
|
|
event = KytosEvent(name='kytos.mef_eline.created', |
|
173
|
|
|
content=evc.as_dict()) |
|
174
|
|
|
self.controller.buffers.app.put(event) |
|
175
|
|
|
|
|
176
|
|
|
result = {"circuit_id": evc.id} |
|
177
|
|
|
status = 201 |
|
178
|
|
|
log.debug('create_circuit result %s %s', result, status) |
|
179
|
|
|
emit_event(self.controller, 'created', evc_id=evc.id) |
|
180
|
1 |
|
return jsonify(result), status |
|
181
|
|
|
|
|
182
|
|
|
@rest('/v2/evc/<circuit_id>', methods=['PATCH']) |
|
183
|
|
|
def update(self, circuit_id): |
|
184
|
|
|
"""Update a circuit based on payload. |
|
185
|
|
|
|
|
186
|
|
|
The EVC required attributes (name, uni_a, uni_z) can't be updated. |
|
187
|
|
|
""" |
|
188
|
|
|
log.debug('update /v2/evc/%s', circuit_id) |
|
189
|
1 |
|
try: |
|
190
|
|
|
evc = self.circuits[circuit_id] |
|
191
|
1 |
|
except KeyError: |
|
192
|
|
|
result = f'circuit_id {circuit_id} not found' |
|
193
|
|
|
log.debug('update result %s %s', result, 404) |
|
194
|
|
|
raise NotFound(result) |
|
195
|
|
|
|
|
196
|
|
|
if evc.archived: |
|
197
|
|
|
result = "Can't update archived EVC" |
|
198
|
|
|
log.debug('update result %s %s', result, 405) |
|
199
|
|
|
raise MethodNotAllowed(['GET'], result) |
|
200
|
|
|
|
|
201
|
|
|
try: |
|
202
|
|
|
data = request.get_json() |
|
203
|
|
|
except BadRequest: |
|
204
|
|
|
result = 'The request body is not a well-formed JSON.' |
|
205
|
1 |
|
log.debug('update result %s %s', result, 400) |
|
206
|
|
|
raise BadRequest(result) |
|
207
|
|
|
if data is None: |
|
208
|
|
|
result = 'The request body mimetype is not application/json.' |
|
209
|
|
|
log.debug('update result %s %s', result, 415) |
|
210
|
|
|
raise UnsupportedMediaType(result) |
|
211
|
|
|
|
|
212
|
|
|
try: |
|
213
|
|
|
enable, redeploy = \ |
|
214
|
|
|
evc.update(**self._evc_dict_with_instances(data)) |
|
215
|
|
|
except ValueError as exception: |
|
216
|
|
|
log.error(exception) |
|
217
|
|
|
log.debug('update result %s %s', exception, 400) |
|
218
|
|
|
raise BadRequest(str(exception)) |
|
219
|
|
|
|
|
220
|
|
|
if evc.is_active(): |
|
221
|
1 |
|
if enable is False: # disable if active |
|
222
|
|
|
with evc.lock: |
|
223
|
|
|
evc.remove() |
|
224
|
|
|
elif redeploy is not None: # redeploy if active |
|
225
|
|
|
with evc.lock: |
|
226
|
1 |
|
evc.remove() |
|
227
|
|
|
evc.deploy() |
|
228
|
1 |
|
else: |
|
229
|
|
|
if enable is True: # enable if inactive |
|
230
|
1 |
|
with evc.lock: |
|
231
|
1 |
|
evc.deploy() |
|
232
|
1 |
|
result = {evc.id: evc.as_dict()} |
|
233
|
|
|
status = 200 |
|
234
|
|
|
|
|
235
|
|
|
log.debug('update result %s %s', result, status) |
|
236
|
1 |
|
emit_event(self.controller, 'updated', evc_id=evc.id, data=data) |
|
237
|
|
|
return jsonify(result), status |
|
238
|
|
|
|
|
239
|
|
|
@rest('/v2/evc/<circuit_id>', methods=['DELETE']) |
|
240
|
|
|
def delete_circuit(self, circuit_id): |
|
241
|
1 |
|
"""Remove a circuit. |
|
242
|
|
|
|
|
243
|
|
|
First, the flows are removed from the switches, and then the EVC is |
|
244
|
|
|
disabled. |
|
245
|
1 |
|
""" |
|
246
|
|
|
log.debug('delete_circuit /v2/evc/%s', circuit_id) |
|
247
|
|
|
try: |
|
248
|
|
|
evc = self.circuits[circuit_id] |
|
249
|
|
|
except KeyError: |
|
250
|
1 |
|
result = f'circuit_id {circuit_id} not found' |
|
251
|
|
|
log.debug('delete_circuit result %s %s', result, 404) |
|
252
|
1 |
|
raise NotFound(result) |
|
253
|
|
|
|
|
254
|
|
|
if evc.archived: |
|
255
|
|
|
result = f'Circuit {circuit_id} already removed' |
|
256
|
|
|
log.debug('delete_circuit result %s %s', result, 404) |
|
257
|
|
|
raise NotFound(result) |
|
258
|
|
|
|
|
259
|
|
|
log.info('Removing %s', evc) |
|
260
|
|
|
evc.remove_current_flows() |
|
261
|
|
|
evc.deactivate() |
|
262
|
|
|
evc.disable() |
|
263
|
|
|
self.sched.remove(evc) |
|
264
|
|
|
evc.archive() |
|
265
|
|
|
evc.sync() |
|
266
|
|
|
log.info('EVC removed. %s', evc) |
|
267
|
|
|
result = {'response': f'Circuit {circuit_id} removed'} |
|
268
|
|
|
status = 200 |
|
269
|
|
|
|
|
270
|
|
|
log.debug('delete_circuit result %s %s', result, status) |
|
271
|
1 |
|
emit_event(self.controller, 'deleted', evc_id=evc.id) |
|
272
|
|
|
return jsonify(result), status |
|
273
|
|
|
|
|
274
|
|
|
@rest('/v2/evc/schedule', methods=['GET']) |
|
275
|
|
|
def list_schedules(self): |
|
276
|
|
|
"""Endpoint to return all schedules stored for all circuits. |
|
277
|
|
|
|
|
278
|
|
|
Return a JSON with the following template: |
|
279
|
|
|
[{"schedule_id": <schedule_id>, |
|
280
|
|
|
"circuit_id": <circuit_id>, |
|
281
|
|
|
"schedule": <schedule object>}] |
|
282
|
|
|
""" |
|
283
|
|
|
log.debug('list_schedules /v2/evc/schedule') |
|
284
|
|
|
circuits = self.storehouse.get_data().values() |
|
285
|
|
|
if not circuits: |
|
286
|
|
|
result = {} |
|
287
|
|
|
status = 200 |
|
288
|
|
|
return jsonify(result), status |
|
289
|
|
|
|
|
290
|
|
|
result = [] |
|
291
|
|
|
status = 200 |
|
292
|
|
|
for circuit in circuits: |
|
293
|
|
|
circuit_scheduler = circuit.get("circuit_scheduler") |
|
294
|
|
|
if circuit_scheduler: |
|
295
|
|
|
for scheduler in circuit_scheduler: |
|
296
|
|
|
value = {"schedule_id": scheduler.get("id"), |
|
297
|
|
|
"circuit_id": circuit.get("id"), |
|
298
|
|
|
"schedule": scheduler} |
|
299
|
|
|
result.append(value) |
|
300
|
|
|
|
|
301
|
|
|
log.debug('list_schedules result %s %s', result, status) |
|
302
|
|
|
return jsonify(result), status |
|
303
|
|
|
|
|
304
|
|
|
@rest('/v2/evc/schedule/', methods=['POST']) |
|
305
|
|
|
def create_schedule(self): |
|
306
|
|
|
""" |
|
307
|
|
|
Create a new schedule for a given circuit. |
|
308
|
|
|
|
|
309
|
|
|
This service do no check if there are conflicts with another schedule. |
|
310
|
|
|
Payload example: |
|
311
|
|
|
{ |
|
312
|
|
|
"circuit_id":"aa:bb:cc", |
|
313
|
|
|
"schedule": { |
|
314
|
|
|
"date": "2019-08-07T14:52:10.967Z", |
|
315
|
|
|
"interval": "string", |
|
316
|
|
|
"frequency": "1 * * * *", |
|
317
|
|
|
"action": "create" |
|
318
|
|
|
} |
|
319
|
|
|
} |
|
320
|
|
|
""" |
|
321
|
|
|
log.debug('create_schedule /v2/evc/schedule/') |
|
322
|
|
|
|
|
323
|
|
|
json_data = self.json_from_request('create_schedule') |
|
324
|
|
|
try: |
|
325
|
|
|
circuit_id = json_data['circuit_id'] |
|
326
|
|
|
except TypeError: |
|
327
|
|
|
result = 'The payload should have a dictionary.' |
|
328
|
|
|
log.debug('create_schedule result %s %s', result, 400) |
|
329
|
|
|
raise BadRequest(result) |
|
330
|
|
|
except KeyError: |
|
331
|
|
|
result = 'Missing circuit_id.' |
|
332
|
|
|
log.debug('create_schedule result %s %s', result, 400) |
|
333
|
|
|
raise BadRequest(result) |
|
334
|
|
|
|
|
335
|
|
|
try: |
|
336
|
|
|
schedule_data = json_data['schedule'] |
|
337
|
|
|
except KeyError: |
|
338
|
|
|
result = 'Missing schedule data.' |
|
339
|
|
|
log.debug('create_schedule result %s %s', result, 400) |
|
340
|
|
|
raise BadRequest(result) |
|
341
|
|
|
|
|
342
|
|
|
# Get EVC from circuits buffer |
|
343
|
|
|
circuits = self._get_circuits_buffer() |
|
344
|
|
|
|
|
345
|
|
|
# get the circuit |
|
346
|
|
|
evc = circuits.get(circuit_id) |
|
347
|
|
|
|
|
348
|
|
|
# get the circuit |
|
349
|
|
|
if not evc: |
|
350
|
|
|
result = f'circuit_id {circuit_id} not found' |
|
351
|
|
|
log.debug('create_schedule result %s %s', result, 404) |
|
352
|
|
|
raise NotFound(result) |
|
353
|
|
|
# Can not modify circuits deleted and archived |
|
354
|
|
|
if evc.archived: |
|
355
|
|
|
result = f'Circuit {circuit_id} is archived. Update is forbidden.' |
|
356
|
|
|
log.debug('create_schedule result %s %s', result, 403) |
|
357
|
|
|
raise Forbidden(result) |
|
358
|
|
|
|
|
359
|
|
|
# new schedule from dict |
|
360
|
|
|
new_schedule = CircuitSchedule.from_dict(schedule_data) |
|
361
|
|
|
|
|
362
|
|
|
# If there is no schedule, create the list |
|
363
|
|
|
if not evc.circuit_scheduler: |
|
364
|
|
|
evc.circuit_scheduler = [] |
|
365
|
|
|
|
|
366
|
|
|
# Add the new schedule |
|
367
|
|
|
evc.circuit_scheduler.append(new_schedule) |
|
368
|
|
|
|
|
369
|
|
|
# Add schedule job |
|
370
|
|
|
self.sched.add_circuit_job(evc, new_schedule) |
|
371
|
|
|
|
|
372
|
|
|
# save circuit to storehouse |
|
373
|
|
|
evc.sync() |
|
374
|
|
|
|
|
375
|
|
|
result = new_schedule.as_dict() |
|
376
|
|
|
status = 201 |
|
377
|
|
|
|
|
378
|
|
|
log.debug('create_schedule result %s %s', result, status) |
|
379
|
|
|
return jsonify(result), status |
|
380
|
|
|
|
|
381
|
|
|
@rest('/v2/evc/schedule/<schedule_id>', methods=['PATCH']) |
|
382
|
|
|
def update_schedule(self, schedule_id): |
|
383
|
|
|
"""Update a schedule. |
|
384
|
|
|
|
|
385
|
|
|
Change all attributes from the given schedule from a EVC circuit. |
|
386
|
|
|
The schedule ID is preserved as default. |
|
387
|
|
|
Payload example: |
|
388
|
|
|
{ |
|
389
|
|
|
"date": "2019-08-07T14:52:10.967Z", |
|
390
|
|
|
"interval": "string", |
|
391
|
|
|
"frequency": "1 * * *", |
|
392
|
|
|
"action": "create" |
|
393
|
|
|
} |
|
394
|
|
|
""" |
|
395
|
|
|
log.debug('update_schedule /v2/evc/schedule/%s', schedule_id) |
|
396
|
|
|
|
|
397
|
|
|
# Try to find a circuit schedule |
|
398
|
|
|
evc, found_schedule = self._find_evc_by_schedule_id(schedule_id) |
|
399
|
|
|
|
|
400
|
|
|
# Can not modify circuits deleted and archived |
|
401
|
|
|
if not found_schedule: |
|
402
|
|
|
result = f'schedule_id {schedule_id} not found' |
|
403
|
|
|
log.debug('update_schedule result %s %s', result, 404) |
|
404
|
|
|
raise NotFound(result) |
|
405
|
|
|
if evc.archived: |
|
406
|
|
|
result = f'Circuit {evc.id} is archived. Update is forbidden.' |
|
407
|
|
|
log.debug('update_schedule result %s %s', result, 403) |
|
408
|
|
|
raise Forbidden(result) |
|
409
|
|
|
|
|
410
|
|
|
data = self.json_from_request('update_schedule') |
|
411
|
|
|
|
|
412
|
|
|
new_schedule = CircuitSchedule.from_dict(data) |
|
413
|
|
|
new_schedule.id = found_schedule.id |
|
414
|
|
|
# Remove the old schedule |
|
415
|
|
|
evc.circuit_scheduler.remove(found_schedule) |
|
416
|
|
|
# Append the modified schedule |
|
417
|
|
|
evc.circuit_scheduler.append(new_schedule) |
|
418
|
|
|
|
|
419
|
|
|
# Cancel all schedule jobs |
|
420
|
|
|
self.sched.cancel_job(found_schedule.id) |
|
421
|
|
|
# Add the new circuit schedule |
|
422
|
|
|
self.sched.add_circuit_job(evc, new_schedule) |
|
423
|
|
|
# Save EVC to the storehouse |
|
424
|
|
|
evc.sync() |
|
425
|
|
|
|
|
426
|
|
|
result = new_schedule.as_dict() |
|
427
|
|
|
status = 200 |
|
428
|
|
|
|
|
429
|
|
|
log.debug('update_schedule result %s %s', result, status) |
|
430
|
|
|
return jsonify(result), status |
|
431
|
|
|
|
|
432
|
|
|
@rest('/v2/evc/schedule/<schedule_id>', methods=['DELETE']) |
|
433
|
|
|
def delete_schedule(self, schedule_id): |
|
434
|
|
|
"""Remove a circuit schedule. |
|
435
|
|
|
|
|
436
|
|
|
Remove the Schedule from EVC. |
|
437
|
|
|
Remove the Schedule from cron job. |
|
438
|
|
|
Save the EVC to the Storehouse. |
|
439
|
|
|
""" |
|
440
|
|
|
log.debug('delete_schedule /v2/evc/schedule/%s', schedule_id) |
|
441
|
|
|
evc, found_schedule = self._find_evc_by_schedule_id(schedule_id) |
|
442
|
|
|
|
|
443
|
|
|
# Can not modify circuits deleted and archived |
|
444
|
|
|
if not found_schedule: |
|
445
|
|
|
result = f'schedule_id {schedule_id} not found' |
|
446
|
|
|
log.debug('delete_schedule result %s %s', result, 404) |
|
447
|
|
|
raise NotFound(result) |
|
448
|
|
|
|
|
449
|
|
|
if evc.archived: |
|
450
|
|
|
result = f'Circuit {evc.id} is archived. Update is forbidden.' |
|
451
|
|
|
log.debug('delete_schedule result %s %s', result, 403) |
|
452
|
|
|
raise Forbidden(result) |
|
453
|
|
|
|
|
454
|
|
|
# Remove the old schedule |
|
455
|
|
|
evc.circuit_scheduler.remove(found_schedule) |
|
456
|
|
|
|
|
457
|
|
|
# Cancel all schedule jobs |
|
458
|
|
|
self.sched.cancel_job(found_schedule.id) |
|
459
|
|
|
# Save EVC to the storehouse |
|
460
|
|
|
evc.sync() |
|
461
|
|
|
|
|
462
|
|
|
result = "Schedule removed" |
|
463
|
|
|
status = 200 |
|
464
|
|
|
|
|
465
|
|
|
log.debug('delete_schedule result %s %s', result, status) |
|
466
|
|
|
return jsonify(result), status |
|
467
|
|
|
|
|
468
|
|
|
def _is_duplicated_evc(self, evc): |
|
469
|
|
|
"""Verify if the circuit given is duplicated with the stored evcs. |
|
470
|
|
|
|
|
471
|
|
|
Args: |
|
472
|
|
|
evc (EVC): circuit to be analysed. |
|
473
|
|
|
|
|
474
|
|
|
Returns: |
|
475
|
|
|
boolean: True if the circuit is duplicated, otherwise False. |
|
476
|
|
|
|
|
477
|
|
|
""" |
|
478
|
|
|
for circuit in tuple(self.circuits.values()): |
|
479
|
|
|
if not circuit.archived and circuit.shares_uni(evc): |
|
480
|
|
|
return True |
|
481
|
|
|
return False |
|
482
|
|
|
|
|
483
|
|
|
@listen_to('kytos/topology.link_up') |
|
484
|
|
|
def handle_link_up(self, event): |
|
485
|
|
|
"""Change circuit when link is up or end_maintenance.""" |
|
486
|
|
|
log.debug("Event handle_link_up %s", event) |
|
487
|
|
|
for evc in self.circuits.values(): |
|
488
|
|
|
if evc.is_enabled() and not evc.archived: |
|
489
|
|
|
with evc.lock: |
|
490
|
|
|
evc.handle_link_up(event.content['link']) |
|
491
|
|
|
|
|
492
|
|
|
@listen_to('kytos/topology.link_down') |
|
493
|
|
|
def handle_link_down(self, event): |
|
494
|
|
|
"""Change circuit when link is down or under_mantenance.""" |
|
495
|
|
|
log.debug("Event handle_link_down %s", event) |
|
496
|
|
|
for evc in self.circuits.values(): |
|
497
|
|
|
with evc.lock: |
|
498
|
|
|
if evc.is_affected_by_link(event.content['link']): |
|
499
|
|
|
log.debug(f'Handling evc {evc.id} on link down') |
|
500
|
|
|
if evc.handle_link_down(): |
|
501
|
|
|
emit_event(self.controller, 'redeployed_link_down', |
|
502
|
|
|
evc_id=evc.id) |
|
503
|
|
|
else: |
|
504
|
|
|
emit_event(self.controller, 'error_redeploy_link_down', |
|
505
|
|
|
evc_id=evc.id) |
|
506
|
|
|
|
|
507
|
|
|
def load_circuits_by_interface(self, circuits): |
|
508
|
|
|
"""Load circuits in storehouse for in-memory dictionary.""" |
|
509
|
|
|
for circuit_id, circuit in circuits.items(): |
|
510
|
|
|
if circuit['archived'] is True: |
|
511
|
|
|
continue |
|
512
|
|
|
intf_a = circuit['uni_a']['interface_id'] |
|
513
|
|
|
self.add_to_dict_of_sets(intf_a, circuit_id) |
|
514
|
|
|
intf_z = circuit['uni_z']['interface_id'] |
|
515
|
|
|
self.add_to_dict_of_sets(intf_z, circuit_id) |
|
516
|
|
|
for path in ('current_path', 'primary_path', 'backup_path'): |
|
517
|
|
|
for link in circuit[path]: |
|
518
|
|
|
intf_a = link['endpoint_a']['id'] |
|
519
|
|
|
self.add_to_dict_of_sets(intf_a, circuit_id) |
|
520
|
|
|
intf_b = link['endpoint_b']['id'] |
|
521
|
|
|
self.add_to_dict_of_sets(intf_b, circuit_id) |
|
522
|
|
|
|
|
523
|
|
|
def add_to_dict_of_sets(self, intf, circuit_id): |
|
524
|
|
|
"""Add a single item to the dictionary of circuits by interface.""" |
|
525
|
|
|
if intf not in self._circuits_by_interface: |
|
526
|
|
|
self._circuits_by_interface[intf] = set() |
|
527
|
|
|
self._circuits_by_interface[intf].add(circuit_id) |
|
528
|
|
|
|
|
529
|
|
|
@listen_to('kytos/topology.port.created') |
|
530
|
|
|
def load_evcs(self, event): |
|
531
|
|
|
"""Try to load the unloaded EVCs from storehouse.""" |
|
532
|
|
|
with self._lock: |
|
533
|
|
|
log.debug("Event load_evcs %s", event) |
|
534
|
|
|
circuits = self.storehouse.get_data() |
|
535
|
|
|
if not self._circuits_by_interface: |
|
536
|
|
|
self.load_circuits_by_interface(circuits) |
|
537
|
|
|
|
|
538
|
|
|
interface_id = '{}:{}'.format(event.content['switch'], |
|
539
|
|
|
event.content['port']) |
|
540
|
|
|
|
|
541
|
|
|
for circuit_id in self._circuits_by_interface.get(interface_id, |
|
542
|
|
|
[]): |
|
543
|
|
|
if circuit_id in circuits and circuit_id not in self.circuits: |
|
544
|
|
|
self._load_evc(circuits[circuit_id]) |
|
545
|
|
|
|
|
546
|
|
|
def load_all_evcs(self): |
|
547
|
|
|
"""Try to load all EVCs on startup.""" |
|
548
|
|
|
for circuit_id, circuit in self.storehouse.get_data().items(): |
|
549
|
|
|
if circuit_id not in self.circuits: |
|
550
|
|
|
self._load_evc(circuit) |
|
551
|
|
|
|
|
552
|
|
|
def _load_evc(self, circuit_dict): |
|
553
|
|
|
"""Load one EVC from storehouse to memory.""" |
|
554
|
|
|
try: |
|
555
|
|
|
evc = self._evc_from_dict(circuit_dict) |
|
556
|
|
|
except ValueError as exception: |
|
557
|
|
|
log.error( |
|
558
|
|
|
f'Could not load EVC {circuit_dict["id"]} ' |
|
559
|
|
|
f'because {exception}') |
|
560
|
|
|
return None |
|
561
|
|
|
|
|
562
|
|
|
if evc.archived: |
|
563
|
|
|
return None |
|
564
|
|
|
evc.deactivate() |
|
565
|
|
|
evc.current_path = Path([]) |
|
566
|
|
|
evc.sync() |
|
567
|
|
|
self.circuits.setdefault(evc.id, evc) |
|
568
|
|
|
self.sched.add(evc) |
|
569
|
|
|
return evc |
|
570
|
|
|
|
|
571
|
|
|
@listen_to('kytos/flow_manager.flow.error') |
|
572
|
|
|
def handle_flow_mod_error(self, event): |
|
573
|
|
|
"""Handle flow mod errors related to an EVC.""" |
|
574
|
|
|
flow = event.content['flow'] |
|
575
|
|
|
command = event.content.get('error_command') |
|
576
|
|
|
if command != 'add': |
|
577
|
|
|
return |
|
578
|
|
|
evc_id = f'{flow.cookie:x}' |
|
579
|
|
|
evc = self.circuits.get(evc_id) |
|
580
|
|
|
if evc: |
|
581
|
|
|
evc.remove_current_flows() |
|
582
|
|
|
|
|
583
|
|
|
def _evc_dict_with_instances(self, evc_dict): |
|
584
|
|
|
"""Convert some dict values to instance of EVC classes. |
|
585
|
|
|
|
|
586
|
|
|
This method will convert: [UNI, Link] |
|
587
|
|
|
""" |
|
588
|
|
|
data = evc_dict.copy() # Do not modify the original dict |
|
589
|
|
|
|
|
590
|
|
|
for attribute, value in data.items(): |
|
591
|
|
|
# Get multiple attributes. |
|
592
|
|
|
# Ex: uni_a, uni_z |
|
593
|
|
|
if 'uni' in attribute: |
|
594
|
|
|
try: |
|
595
|
|
|
data[attribute] = self._uni_from_dict(value) |
|
596
|
|
|
except ValueError as exc: |
|
597
|
|
|
raise ValueError(f'Error creating UNI: {exc}') |
|
598
|
|
|
|
|
599
|
|
|
if attribute == 'circuit_scheduler': |
|
600
|
|
|
data[attribute] = [] |
|
601
|
|
|
for schedule in value: |
|
602
|
|
|
data[attribute].append(CircuitSchedule.from_dict(schedule)) |
|
603
|
|
|
|
|
604
|
|
|
# Get multiple attributes. |
|
605
|
|
|
# Ex: primary_links, |
|
606
|
|
|
# backup_links, |
|
607
|
|
|
# current_links_cache, |
|
608
|
|
|
# primary_links_cache, |
|
609
|
|
|
# backup_links_cache |
|
610
|
|
|
if 'links' in attribute: |
|
611
|
|
|
data[attribute] = [self._link_from_dict(link) |
|
612
|
|
|
for link in value] |
|
613
|
|
|
|
|
614
|
|
|
# Get multiple attributes. |
|
615
|
|
|
# Ex: current_path, |
|
616
|
|
|
# primary_path, |
|
617
|
|
|
# backup_path |
|
618
|
|
|
if 'path' in attribute and attribute != 'dynamic_backup_path': |
|
619
|
|
|
data[attribute] = Path([self._link_from_dict(link) |
|
620
|
|
|
for link in value]) |
|
621
|
|
|
|
|
622
|
|
|
return data |
|
623
|
|
|
|
|
624
|
|
|
def _evc_from_dict(self, evc_dict): |
|
625
|
|
|
data = self._evc_dict_with_instances(evc_dict) |
|
626
|
|
|
return EVC(self.controller, **data) |
|
627
|
|
|
|
|
628
|
|
|
def _uni_from_dict(self, uni_dict): |
|
629
|
|
|
"""Return a UNI object from python dict.""" |
|
630
|
|
|
if uni_dict is None: |
|
631
|
|
|
return False |
|
632
|
|
|
|
|
633
|
|
|
interface_id = uni_dict.get("interface_id") |
|
634
|
|
|
interface = self.controller.get_interface_by_id(interface_id) |
|
635
|
|
|
if interface is None: |
|
636
|
|
|
raise ValueError(f'Could not instantiate interface {interface_id}') |
|
637
|
|
|
|
|
638
|
|
|
tag_dict = uni_dict.get('tag', None) |
|
639
|
|
|
if tag_dict: |
|
640
|
|
|
tag = TAG.from_dict(tag_dict) |
|
641
|
|
|
else: |
|
642
|
|
|
tag = None |
|
643
|
|
|
uni = UNI(interface, tag) |
|
644
|
|
|
|
|
645
|
|
|
return uni |
|
646
|
|
|
|
|
647
|
|
|
def _link_from_dict(self, link_dict): |
|
648
|
|
|
"""Return a Link object from python dict.""" |
|
649
|
|
|
id_a = link_dict.get('endpoint_a').get('id') |
|
650
|
|
|
id_b = link_dict.get('endpoint_b').get('id') |
|
651
|
|
|
|
|
652
|
|
|
endpoint_a = self.controller.get_interface_by_id(id_a) |
|
653
|
|
|
endpoint_b = self.controller.get_interface_by_id(id_b) |
|
654
|
|
|
|
|
655
|
|
|
link = Link(endpoint_a, endpoint_b) |
|
656
|
|
|
if 'metadata' in link_dict: |
|
657
|
|
|
link.extend_metadata(link_dict.get('metadata')) |
|
658
|
|
|
|
|
659
|
|
|
s_vlan = link.get_metadata('s_vlan') |
|
660
|
|
|
if s_vlan: |
|
661
|
|
|
tag = TAG.from_dict(s_vlan) |
|
662
|
|
|
if tag is False: |
|
663
|
|
|
error_msg = f'Could not instantiate tag from dict {s_vlan}' |
|
664
|
|
|
raise ValueError(error_msg) |
|
665
|
|
|
link.update_metadata('s_vlan', tag) |
|
666
|
|
|
return link |
|
667
|
|
|
|
|
668
|
|
|
def _find_evc_by_schedule_id(self, schedule_id): |
|
669
|
|
|
""" |
|
670
|
|
|
Find an EVC and CircuitSchedule based on schedule_id. |
|
671
|
|
|
|
|
672
|
|
|
:param schedule_id: Schedule ID |
|
673
|
|
|
:return: EVC and Schedule |
|
674
|
|
|
""" |
|
675
|
|
|
circuits = self._get_circuits_buffer() |
|
676
|
|
|
found_schedule = None |
|
677
|
|
|
evc = None |
|
678
|
|
|
|
|
679
|
|
|
# pylint: disable=unused-variable |
|
680
|
|
|
for c_id, circuit in circuits.items(): |
|
681
|
|
|
for schedule in circuit.circuit_scheduler: |
|
682
|
|
|
if schedule.id == schedule_id: |
|
683
|
|
|
found_schedule = schedule |
|
684
|
|
|
evc = circuit |
|
685
|
|
|
break |
|
686
|
|
|
if found_schedule: |
|
687
|
|
|
break |
|
688
|
|
|
return evc, found_schedule |
|
689
|
|
|
|
|
690
|
|
|
def _get_circuits_buffer(self): |
|
691
|
|
|
""" |
|
692
|
|
|
Return the circuit buffer. |
|
693
|
|
|
|
|
694
|
|
|
If the buffer is empty, try to load data from storehouse. |
|
695
|
|
|
""" |
|
696
|
|
|
if not self.circuits: |
|
697
|
|
|
# Load storehouse circuits to buffer |
|
698
|
|
|
circuits = self.storehouse.get_data() |
|
699
|
|
|
for c_id, circuit in circuits.items(): |
|
700
|
|
|
evc = self._evc_from_dict(circuit) |
|
701
|
|
|
self.circuits[c_id] = evc |
|
702
|
|
|
return self.circuits |
|
703
|
|
|
|
|
704
|
|
|
@staticmethod |
|
705
|
|
|
def json_from_request(caller): |
|
706
|
|
|
"""Return a json from request. |
|
707
|
|
|
|
|
708
|
|
|
If it was not possible to get a json from the request, log, for debug, |
|
709
|
|
|
who was the caller and the error that ocurred, and raise an |
|
710
|
|
|
Exception. |
|
711
|
|
|
""" |
|
712
|
|
|
try: |
|
713
|
|
|
json_data = request.get_json() |
|
714
|
|
|
except ValueError as exception: |
|
715
|
|
|
log.error(exception) |
|
716
|
|
|
log.debug(f'{caller} result {exception} 400') |
|
717
|
|
|
raise BadRequest(str(exception)) |
|
718
|
|
|
except BadRequest: |
|
719
|
|
|
result = 'The request is not a valid JSON.' |
|
720
|
|
|
log.debug(f'{caller} result {result} 400') |
|
721
|
|
|
raise BadRequest(result) |
|
722
|
|
|
if json_data is None: |
|
723
|
|
|
result = 'Content-Type must be application/json' |
|
724
|
|
|
log.debug(f'{caller} result {result} 415') |
|
725
|
|
|
raise UnsupportedMediaType(result) |
|
726
|
|
|
return json_data |
|
727
|
|
|
|
ajoaoff /
mef_eline
