forked from waggle-sensor/beehive-server
-
Notifications
You must be signed in to change notification settings - Fork 0
/
registrationprocess.py
375 lines (296 loc) · 14.6 KB
/
registrationprocess.py
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
# registrationprocess.py
import sys
import os
sys.path.append("..")
sys.path.append("/usr/lib/waggle/")
from multiprocessing import Process, Manager
from config import *
import pika
from waggle_protocol.protocol.PacketHandler import *
import logging
#logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.CRITICAL)
from crcmod.predefined import mkCrcFun
from cassandra.cluster import Cluster
import time
import json
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)
class RegProcess(Process):
"""
This process handles all registration requests.
It is responsible to receiving all requests, updating the routing table,
and writing the routing information to a permanent file.
"""
def __init__(self,node_table):
"""
Starts up the Registration Process
"""
super(RegProcess,self).__init__()
self.node_table = node_table
def callback(self,ch,method,props,body):
"""
Handles incoming registration messages, including:
Initial registration (subtype 'r')
SSL Certificate Registration (subtype 's')
Configuration file registration (subtype 'n')
Each subtype is handled as a apart of an if-elif statement.
"""
header,msg = unpack(body)
s_uniqid_str = nodeid_int2hexstr(header["s_uniqid"])
major = chr(header["msg_mj_type"])
minor = chr(header["msg_mi_type"])
logger.info("Received a registration request (%s%s) from node \"%s\"." % (major, minor, s_uniqid_str))
logger.debug("header: "+str(header))
# Unpack the header and see if it is already registered
minor_type = None
# while is not used as a loop, I just want to use break
while True:
if minor == 'r':
#
# DEPRECATED for now. (major, minor = rr)
#
logger.error("rr is deprecated")
break
if header["s_uniqid"] in self.node_table:
minor_type = ord('a');
else:
logger.info("Registering new node.")
# Add the node to the registration file and make and bind its queue
#if not os.path.exists('registrations'):
# os.makedirs('registrations')
#with open('registrations/nodes.txt','a+') as nodeList:
# nodeList.write("{}:{}\n".format(str(header["s_uniqid"]),msg))
s_uniqid_int = header["s_uniqid"]
self.cassandra_register_node()
self.channel.queue_declare(msg)
self.channel.queue_bind(exchange='internal',queue=msg,routing_key=msg)
#self.routing_table[header["s_uniqid"]] = msg
minor_type = ord('n')
# Send the node a registration confirmation.
resp_header = {
"msg_mj_type" : ord('r'),
"msg_mi_type" : minor_type,
"r_uniqid" : header["s_uniqid"],
"resp_session": header["snd_session"]
}
msg = "Congratulations node {}! You are registered under the queue {}!".format(header["s_uniqid"],msg)
for packet in pack(resp_header,msg):
response = packet
self.channel.basic_publish(exchange='waggle_in',routing_key="in",body=response)
elif minor == 's': # They want to get an SSL Certificate
#
# DEPRECATED
#
logger.error("Someone wants an SSL cert.")
break
# Write the request to a file to be used by the CA for signing
replyQueue = msg.split("\n")[0]
msg = "\n".join(msg.split("\n")[1:])
print replyQueue
certFile = "/tmp/" + self.name
with open(certFile + "_req.pem","w+") as cert:
cert.write(msg)
cmd = "openssl ca -config /usr/lib/waggle/SSL/waggleca/openssl.cnf " + \
"-in " + certFile + "_req.pem" + " -out " + certFile + "_cert.pem " + \
"-notext -batch -extensions client_ca_extensions"
os.system(cmd)
cert = ""
with open(certFile + "_cert.pem","r") as cert:
cert = cert.read()
print cert
ch.basic_publish(exchange='',
routing_key=replyQueue,
body=cert)
elif minor == 'n': # They are sending us a config file.
# Cassandra note: If the node is already in the node_info table,
# then this will preform an UPSERT of the config file instead of an INSERT.
# This is inherent to Cassandra, so is not explicitly stated here.
# convert int to hex_str
config_dict = {}
try:
config_dict = json.loads(msg)
except ValueError as e:
logger.error("error (ValueError) parsing json (msg=%s): %s" % (msg, str(e)))
break
except Exception as e:
logger.error("error (Exception) parsing json (msg=%s): %s" % (msg, str(e)))
break
logger.debug("registration message: %s" % (str(config_dict)))
node_id = config_dict['node_id']
if s_uniqid_str != node_id:
logger.error("Sender node IDs do not match. header=%s config=%s" % (s_uniqid_str, node_id) )
break
logger.info("registration request from node %s" % (node_id))
queue = config_dict['queue']
if not queue:
logger.error("no queue specified" )
break
self.channel.queue_declare(queue)
self.channel.queue_bind(exchange='internal',queue=queue,routing_key=queue)
logger.debug("queue %s declared." % (queue))
node_name = config_dict['name']
if not node_name:
node_name = "unknown"
try:
#self.cassandra_insert(header,msg)
self.cassandra_register_node(config_dict)
except Exception as e:
logger.warning("Cassandra registration failed. Will retry soon... error: %s" % (str(e)))
time.sleep(1)
break
# update node_table
self.node_table[node_id] = {'node_id': node_id, 'queue' : queue , 'name' : node_name}
logger.debug("node_table updated")
# Send the node a registration confirmation.
resp_header = {
"msg_mj_type" : ord('r'),
"msg_mi_type" : ord('n'),
"r_uniqid" : header["s_uniqid"],
"resp_session": header["snd_session"]
}
msg = "Congratulations node {}! You are registered under the queue {}!".format(s_uniqid_str, queue)
for packet in pack(resp_header,msg):
response = packet
self.channel.basic_publish(exchange='waggle_in',routing_key="in",body=response)
break
ch.basic_ack(delivery_tag = method.delivery_tag)
def cassandra_insert(self,header,data):
"""
Insert a list of data into the currently connected Cassandra database.
"""
if self.session == None:
self.cassandra_connect()
try:
prepared_statement = self.session.prepare("INSERT INTO node_info" + \
" (node_id, timestamp, config_file)" + \
" VALUES (?, ?, ?)")
except Exception as e:
logger.error("self.session.prepare crashed: "+str(e))
raise
# convert int to hex_str
s_uniqid_str = nodeid_int2hexstr(header["s_uniqid"])
try:
#bound_statement = prepared_statement.bind([header["s_uniqid"],time.time()*1000,data])
bound_statement = prepared_statement.bind([s_uniqid_str,time.time()*1000,data])
except Exception as e:
logger.error("prepared_statement.bind: "+str(e))
raise
try:
self.session.execute(bound_statement)
except Exception as e:
logger.error("self.session.execute crashed: "+str(e))
raise
def cassandra_register_node(self, config_dict):
# table: node_id ascii PRIMARY KEY, timestamp timestamp, queue ascii, config_file ascii, extra_notes list<ascii>, sensor_names list<ascii>, height double, latitude double, longitude double, name ascii
# node_id, timestamp, queue, config_file, extra_notes, sensor_names, height, latitude, longitude, name
try:
registration_timestamp = int(float(datetime.datetime.utcnow().strftime("%s.%f"))) * 1000
config_dict['timestamp']=registration_timestamp
reg_keys="node_id"
reg_values = "%(node_id)s"
for key in ['timestamp', 'queue', 'reverse_port', 'reverse_port' ,'name' ,'parent','children']:
if key in config_dict:
reg_keys = reg_keys + ", " + key
reg_values = reg_values + ", %(" + key + ")s"
statement = "INSERT INTO nodes ("+ reg_keys +") VALUES (" + reg_values + ");"
except Exception as e:
logger.error("statement creation failed: "+str(e))
raise
#statement = "UPDATE nodes SET timestamp='%s' , queue='%s' , name='%s' WHERE node_id='%s'" % (unix_time_millis(datetime.datetime.now()), queue, name, node_id)
logger.debug("created cassandra statement: %s" % (statement))
while True:
success = True
# Using self.session did not work, thus use separate cluster/session object.
try:
reg_cluster = Cluster(contact_points=[CASSANDRA_HOST])
logger.debug("created cluster object")
reg_session = reg_cluster.connect('waggle')
logger.debug("created session object")
reg_session.execute(statement, config_dict)
logger.debug("executed statement")
reg_cluster.shutdown()
logger.debug("shut reg_cluster down")
except Exception as e:
logger.error("registration session failed. Statement: %s Error: %s " % (statement, str(e)) )
success = False
if success:
break
else:
logger.debug("sleep 5 seconds")
time.sleep(5)
logger.debug("node %s registered." % (config_dict['node_id']))
def cassandra_connect(self):
"""
Try to establish a new connection to Cassandra.
"""
while not self.cluster:
try:
self.cluster = Cluster(contact_points=[CASSANDRA_HOST])
except Exception as e:
logger.error("self.cluster.connect failed: " + str(e))
self.cluster = None
time.sleep(2)
while not self.session:
logger.debug("self.session == None")
try: # Might not immediately connect. That's fine. It'll try again if/when it needs to.
self.session = self.cluster.connect('waggle')
except Exception as e:
logger.error("(self.cluster.connect): Cassandra connection to " + CASSANDRA_HOST + " failed: " + str(e))
self.session = None
time.sleep(3)
continue
logger.debug("self.session should be OK now")
def cassandra_init(self):
# cqls defined in config.py
statements = [keyspace_cql, sensor_data_cql, nodes_cql]
while True:
self.cassandra_connect()
success = True
for statement in statements:
try:
self.session.execute(statement)
except Exception as e:
logger.error("(self.session.execute(statement)) failed. Statement: %s Error: %s " % (statement, str(e)) )
success = False
break
if success:
break
else:
time.sleep(5)
logger.debug("Cassandra database initialized.")
def run(self):
self.session = None
self.cluster = None
self.connection = None
logger.info("Initializing RegProcess")
self.cassandra_init()
# Set up the Rabbit connection
#self.connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
while True:
try:
self.connection = pika.BlockingConnection(pika_params)
except Exception as e:
logger.error("Could not connect to RabbitMQ server \"%s\": %s" % (pika_params.host, e))
time.sleep(1)
continue
break
logger.info("Connected to RabbitMQ server \"%s\"" % (pika_params.host))
self.channel = self.connection.channel()
self.channel.basic_qos(prefetch_count=1)
# Declare this process's queue
self.channel.queue_declare("registration")
try:
self.channel.basic_consume(self.callback, queue='registration')
except Exception as e:
logger.warning("channel.basic_consume crashed :"+ str(e))
self.cassandra_connect()
try:
self.channel.start_consuming()
except KeyboardInterrupt:
logger.info("exiting.")
sys.exit(0)
except Exception as e:
logger.error("error: %s" % (str(e)))
def join(self):
super(RegProcess,self).terminate()
self.connection.close()