root / snf-cyclades-app / synnefo / logic / callbacks.py @ 039e3e61
History | View | Annotate | Download (10.1 kB)
1 |
# Copyright 2011 GRNET S.A. All rights reserved.
|
---|---|
2 |
#
|
3 |
# Redistribution and use in source and binary forms, with or without
|
4 |
# modification, are permitted provided that the following conditions
|
5 |
# are met:
|
6 |
#
|
7 |
# 1. Redistributions of source code must retain the above copyright
|
8 |
# notice, this list of conditions and the following disclaimer.
|
9 |
#
|
10 |
# 2. Redistributions in binary form must reproduce the above copyright
|
11 |
# notice, this list of conditions and the following disclaimer in the
|
12 |
# documentation and/or other materials provided with the distribution.
|
13 |
#
|
14 |
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
15 |
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
16 |
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
17 |
# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
18 |
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
19 |
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
20 |
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
21 |
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
22 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
23 |
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
24 |
# SUCH DAMAGE.
|
25 |
#
|
26 |
# The views and conclusions contained in the software and documentation are
|
27 |
# those of the authors and should not be interpreted as representing official
|
28 |
# policies, either expressed or implied, of GRNET S.A.
|
29 |
|
30 |
# Callback functions used by the dispatcher to process incoming notifications
|
31 |
# from AMQP queues.
|
32 |
|
33 |
import logging |
34 |
import json |
35 |
from functools import wraps |
36 |
|
37 |
from synnefo.db.models import Backend, VirtualMachine, Network, BackendNetwork |
38 |
from synnefo.logic import utils, backend |
39 |
|
40 |
from synnefo.lib.utils import merge_time |
41 |
|
42 |
log = logging.getLogger(__name__) |
43 |
|
44 |
def handle_message_delivery(func): |
45 |
""" Generic decorator for handling messages.
|
46 |
|
47 |
This decorator is responsible for converting the message into json format,
|
48 |
handling of common exceptions and acknowledment of message if needed.
|
49 |
|
50 |
"""
|
51 |
@wraps(func)
|
52 |
def wrapper(client, message, *args, **kwargs): |
53 |
try:
|
54 |
msg = None
|
55 |
msg = json.loads(message['body'])
|
56 |
func(msg) |
57 |
client.basic_ack(message) |
58 |
except ValueError as e: |
59 |
log.error("Incoming message not in JSON format %s: %s", e, message)
|
60 |
client.basic_nack(message) |
61 |
except KeyError as e: |
62 |
log.error("Malformed incoming JSON, missing attribute %s: %s",
|
63 |
e, message) |
64 |
client.basic_nack(message) |
65 |
except Exception as e: |
66 |
if msg:
|
67 |
log.exception("Unexpected error: %s, msg: %s", e, msg)
|
68 |
else:
|
69 |
log.exception("Unexpected error: %s", e)
|
70 |
client.basic_reject(message) |
71 |
|
72 |
return wrapper
|
73 |
|
74 |
|
75 |
def instance_from_msg(func): |
76 |
""" Decorator for getting the VirtualMachine object of the msg.
|
77 |
|
78 |
"""
|
79 |
@handle_message_delivery
|
80 |
@wraps(func)
|
81 |
def wrapper(msg): |
82 |
try:
|
83 |
vm_id = utils.id_from_instance_name(msg["instance"])
|
84 |
vm = VirtualMachine.objects.select_for_update().get(id=vm_id) |
85 |
func(vm, msg) |
86 |
except VirtualMachine.InvalidBackendIdError:
|
87 |
log.debug("Ignoring msg for unknown instance %s.", msg['instance']) |
88 |
except VirtualMachine.DoesNotExist:
|
89 |
log.error("VM for instance %s with id %d not found in DB.",
|
90 |
msg['instance'], vm_id)
|
91 |
except Network.InvalidBackendIdError, Network.DoesNotExist:
|
92 |
log.error("Invalid message", msg)
|
93 |
return wrapper
|
94 |
|
95 |
|
96 |
def network_from_msg(func): |
97 |
""" Decorator for getting the BackendNetwork object of the msg.
|
98 |
|
99 |
"""
|
100 |
@handle_message_delivery
|
101 |
@wraps(func)
|
102 |
def wrapper(msg): |
103 |
try:
|
104 |
network_id = utils.id_from_network_name(msg["network"])
|
105 |
network = Network.objects.select_for_update().get(id=network_id) |
106 |
backend = Backend.objects.get(clustername=msg['cluster'])
|
107 |
backend_network = BackendNetwork.objects.get(network=network, |
108 |
backend=backend) |
109 |
func(backend_network, msg) |
110 |
except Network.InvalidBackendIdError:
|
111 |
log.debug("Ignoring msg for unknown network %s.", msg['network']) |
112 |
except Network.DoesNotExist:
|
113 |
log.error("Network %s not found in DB.", msg['network']) |
114 |
except Backend.DoesNotExist:
|
115 |
log.error("Backend %s not found in DB.", msg['cluster']) |
116 |
except BackendNetwork.DoesNotExist:
|
117 |
log.error("Network %s on backend %s not found in DB.",
|
118 |
msg['network'], msg['cluster']) |
119 |
return wrapper
|
120 |
|
121 |
|
122 |
def if_update_required(func): |
123 |
"""
|
124 |
Decorator for checking if an incoming message needs to update the db.
|
125 |
|
126 |
The database will not be updated in the following cases:
|
127 |
- The message has been redelivered and the action has already been
|
128 |
completed. In this case the event_time will be equal with the one
|
129 |
in the database.
|
130 |
- The message describes a previous state in the ganeti, from the one that
|
131 |
is described in the db. In this case the event_time will be smaller from
|
132 |
the one in the database.
|
133 |
|
134 |
"""
|
135 |
@wraps(func)
|
136 |
def wrapper(target, msg): |
137 |
try:
|
138 |
event_time = merge_time(msg['event_time'])
|
139 |
except:
|
140 |
log.error("Received message with malformed time: %s",
|
141 |
msg['event_time'])
|
142 |
raise KeyError |
143 |
|
144 |
db_time = target.backendtime |
145 |
|
146 |
if db_time and event_time <= db_time: |
147 |
format_ = "%d/%m/%y %H:%M:%S:%f"
|
148 |
log.debug("Ignoring message %s.\nevent_timestamp: %s db_timestamp: %s",
|
149 |
msg, |
150 |
event_time.strftime(format_), |
151 |
db_time.strftime(format_)) |
152 |
return
|
153 |
# New message. Update the database!
|
154 |
func(target, msg, event_time) |
155 |
|
156 |
return wrapper
|
157 |
|
158 |
|
159 |
@instance_from_msg
|
160 |
@if_update_required
|
161 |
def update_db(vm, msg, event_time): |
162 |
"""Process a notification of type 'ganeti-op-status'"""
|
163 |
log.debug("Processing ganeti-op-status msg: %s", msg)
|
164 |
|
165 |
if msg['type'] != "ganeti-op-status": |
166 |
log.error("Message is of unknown type %s.", msg['type']) |
167 |
return
|
168 |
|
169 |
backend.process_op_status(vm, event_time, msg['jobId'], msg['operation'], |
170 |
msg['status'], msg['logmsg']) |
171 |
|
172 |
log.debug("Done processing ganeti-op-status msg for vm %s.",
|
173 |
msg['instance'])
|
174 |
|
175 |
|
176 |
@instance_from_msg
|
177 |
@if_update_required
|
178 |
def update_net(vm, msg, event_time): |
179 |
"""Process a notification of type 'ganeti-net-status'"""
|
180 |
log.debug("Processing ganeti-net-status msg: %s", msg)
|
181 |
|
182 |
if msg['type'] != "ganeti-net-status": |
183 |
log.error("Message is of unknown type %s", msg['type']) |
184 |
return
|
185 |
|
186 |
backend.process_net_status(vm, event_time, msg['nics'])
|
187 |
|
188 |
log.debug("Done processing ganeti-net-status msg for vm %s.",
|
189 |
msg["instance"])
|
190 |
|
191 |
|
192 |
@network_from_msg
|
193 |
@if_update_required
|
194 |
def update_network(network, msg, event_time): |
195 |
"""Process a notification of type 'ganeti-network-status'"""
|
196 |
log.debug("Processing ganeti-network-status msg: %s", msg)
|
197 |
|
198 |
if msg['type'] != "ganeti-network-status": |
199 |
log.error("Message is of unknown type %s.", msg['type']) |
200 |
return
|
201 |
|
202 |
opcode = msg['operation']
|
203 |
status = msg['status']
|
204 |
jobid = msg['jobId']
|
205 |
|
206 |
if opcode == "OP_NETWORK_SET_PARAMS": |
207 |
backend.process_network_modify(network, event_time, jobid, opcode, |
208 |
status, msg['add_reserved_ips'],
|
209 |
msg['remove_reserved_ips'])
|
210 |
else:
|
211 |
backend.process_network_status(network, event_time, jobid, opcode, |
212 |
status, msg['logmsg'])
|
213 |
|
214 |
log.debug("Done processing ganeti-network-status msg for network %s.",
|
215 |
msg['network'])
|
216 |
|
217 |
|
218 |
@instance_from_msg
|
219 |
@if_update_required
|
220 |
def update_build_progress(vm, msg, event_time): |
221 |
"""
|
222 |
Process a create progress message. Update build progress, or create
|
223 |
appropriate diagnostic entries for the virtual machine instance.
|
224 |
"""
|
225 |
log.debug("Processing ganeti-create-progress msg: %s", msg)
|
226 |
|
227 |
if msg['type'] not in ('image-copy-progress', 'image-error', 'image-info', |
228 |
'image-warning', 'image-helper'): |
229 |
log.error("Message is of unknown type %s", msg['type']) |
230 |
return
|
231 |
|
232 |
if msg['type'] == 'image-copy-progress': |
233 |
backend.process_create_progress(vm, event_time, msg['progress'])
|
234 |
# we do not add diagnostic messages for copy-progress messages
|
235 |
return
|
236 |
|
237 |
# default diagnostic fields
|
238 |
source = msg['type']
|
239 |
level = 'DEBUG'
|
240 |
message = msg.get('messages', None) |
241 |
if isinstance(message, list): |
242 |
message = " ".join(message)
|
243 |
|
244 |
details = msg.get('stderr', None) |
245 |
|
246 |
if msg['type'] == 'image-helper': |
247 |
# for helper task events join subtype to diagnostic source and
|
248 |
# set task name as diagnostic message
|
249 |
if msg.get('subtype', None) and msg.get('subtype') in ['task-start', |
250 |
'task-end']:
|
251 |
message = msg.get('task', message)
|
252 |
source = "%s-%s" % (source, msg.get('subtype')) |
253 |
|
254 |
if msg.get('subtype', None) == 'warning': |
255 |
level = 'WARNING'
|
256 |
|
257 |
if msg.get('subtype', None) == 'error': |
258 |
level = 'ERROR'
|
259 |
|
260 |
if msg.get('subtype', None) == 'info': |
261 |
level = 'INFO'
|
262 |
|
263 |
if msg['type'] == 'image-error': |
264 |
level = 'ERROR'
|
265 |
|
266 |
if msg['type'] == 'image-warning': |
267 |
level = 'WARNING'
|
268 |
|
269 |
if not message.strip(): |
270 |
message = " ".join(source.split("-")).capitalize() |
271 |
|
272 |
# create the diagnostic entry
|
273 |
backend.create_instance_diagnostic(vm, message, source, level, event_time, |
274 |
details=details) |
275 |
|
276 |
log.debug("Done processing ganeti-create-progress msg for vm %s.",
|
277 |
msg['instance'])
|
278 |
|
279 |
|
280 |
def dummy_proc(client, message, *args, **kwargs): |
281 |
try:
|
282 |
log.debug("Msg: %s", message['body']) |
283 |
client.basic_ack(message) |
284 |
except Exception as e: |
285 |
log.exception("Could not receive message %s" % e)
|