|
1 |
#!/usr/bin/env python
|
|
2 |
#
|
|
3 |
# Copyright (c) 2010 Greek Research and Technology Network
|
|
4 |
#
|
|
5 |
"""Ganeti notification daemon with ampq
|
|
6 |
|
|
7 |
A daemon to monitor the Ganeti job queue and publish job progress
|
|
8 |
and Ganeti VM state notifications over a 0mq PUB endpoint.
|
|
9 |
|
|
10 |
"""
|
|
11 |
|
|
12 |
from django.core.management import setup_environ
|
|
13 |
|
|
14 |
import sys
|
|
15 |
import os
|
|
16 |
path = os.path.normpath(os.path.join(os.getcwd(), '..'))
|
|
17 |
sys.path.append(path)
|
|
18 |
import synnefo.settings as settings
|
|
19 |
|
|
20 |
setup_environ(settings)
|
|
21 |
|
|
22 |
import time
|
|
23 |
import json
|
|
24 |
import logging
|
|
25 |
import pyinotify
|
|
26 |
import daemon
|
|
27 |
import daemon.pidlockfile
|
|
28 |
from signal import signal, SIGINT, SIGTERM
|
|
29 |
|
|
30 |
from carrot.connection import BrokerConnection
|
|
31 |
from carrot.messaging import Publisher
|
|
32 |
|
|
33 |
from threading import Thread, Event, currentThread
|
|
34 |
|
|
35 |
from ganeti import utils
|
|
36 |
from ganeti import jqueue
|
|
37 |
from ganeti import constants
|
|
38 |
from ganeti import serializer
|
|
39 |
|
|
40 |
class JobFileHandler(pyinotify.ProcessEvent):
|
|
41 |
def __init__(self, logger, amqpd):
|
|
42 |
pyinotify.ProcessEvent.__init__(self)
|
|
43 |
self.logger = logger
|
|
44 |
self.amqpd = amqpd
|
|
45 |
|
|
46 |
def process_IN_CLOSE_WRITE(self, event):
|
|
47 |
jobfile = os.path.join(event.path, event.name)
|
|
48 |
if not event.name.startswith("job-"):
|
|
49 |
self.logger.debug("Not a job file: %s" % event.path)
|
|
50 |
return
|
|
51 |
|
|
52 |
try:
|
|
53 |
data = utils.ReadFile(jobfile)
|
|
54 |
except IOError:
|
|
55 |
|
|
56 |
return
|
|
57 |
|
|
58 |
data = serializer.LoadJson(data)
|
|
59 |
job = jqueue._QueuedJob.Restore(None, data)
|
|
60 |
|
|
61 |
for op in job.ops:
|
|
62 |
instances = ""
|
|
63 |
try:
|
|
64 |
instances = " ".join(op.input.instances)
|
|
65 |
except AttributeError:
|
|
66 |
pass
|
|
67 |
|
|
68 |
try:
|
|
69 |
instances = op.input.instance_name
|
|
70 |
except AttributeError:
|
|
71 |
pass
|
|
72 |
|
|
73 |
# Get the last line of the op log as message
|
|
74 |
try:
|
|
75 |
logmsg = op.log[-1][-1]
|
|
76 |
except IndexError:
|
|
77 |
logmsg = None
|
|
78 |
|
|
79 |
self.logger.debug("%d: %s(%s) %s %s",
|
|
80 |
int(job.id), op.input.OP_ID, instances, op.status, logmsg)
|
|
81 |
|
|
82 |
# Construct message
|
|
83 |
msg = {
|
|
84 |
"type": "ganeti-op-status",
|
|
85 |
"instance": instances,
|
|
86 |
"operation": op.input.OP_ID,
|
|
87 |
"jobId": int(job.id),
|
|
88 |
"status": op.status,
|
|
89 |
"logmsg": logmsg
|
|
90 |
}
|
|
91 |
if logmsg:
|
|
92 |
msg["message"] = logmsg
|
|
93 |
|
|
94 |
self.logger.debug("PUSHing msg: %s", json.dumps(msg))
|
|
95 |
amqpd.send(json.dumps(msg))
|
|
96 |
|
|
97 |
|
|
98 |
handler_logger = None
|
|
99 |
def fatal_signal_handler(signum, frame):
|
|
100 |
global handler_logger
|
|
101 |
|
|
102 |
handler_logger.info("Caught fatal signal %d, will raise SystemExit",
|
|
103 |
signum)
|
|
104 |
raise SystemExit
|
|
105 |
|
|
106 |
def parse_arguments(args):
|
|
107 |
from optparse import OptionParser
|
|
108 |
|
|
109 |
parser = OptionParser()
|
|
110 |
parser.add_option("-d", "--debug", action="store_true", dest="debug",
|
|
111 |
help="Enable debugging information")
|
|
112 |
parser.add_option("-l", "--log", dest="log_file",
|
|
113 |
default=settings.GANETI_EVENTD_LOG_FILE,
|
|
114 |
metavar="FILE",
|
|
115 |
help="Write log to FILE instead of %s" %
|
|
116 |
settings.GANETI_EVENTD_LOG_FILE),
|
|
117 |
parser.add_option('--pid-file', dest="pid_file",
|
|
118 |
default=settings.GANETI_EVENTD_PID_FILE,
|
|
119 |
metavar='PIDFILE',
|
|
120 |
help="Save PID to file (default: %s)" %
|
|
121 |
settings.GANETI_EVENTD_PID_FILE)
|
|
122 |
|
|
123 |
return parser.parse_args(args)
|
|
124 |
|
|
125 |
def main():
|
|
126 |
global handler_logger
|
|
127 |
|
|
128 |
(opts, args) = parse_arguments(sys.argv[1:])
|
|
129 |
|
|
130 |
# Create pidfile
|
|
131 |
pidf = daemon.pidlockfile.TimeoutPIDLockFile(opts.pid_file, 10)
|
|
132 |
|
|
133 |
# Initialize logger
|
|
134 |
lvl = logging.DEBUG if opts.debug else logging.INFO
|
|
135 |
logger = logging.getLogger("ganeti-amqpd")
|
|
136 |
logger.setLevel(lvl)
|
|
137 |
formatter = logging.Formatter("%(asctime)s %(module)s[%(process)d] %(levelname)s: %(message)s",
|
|
138 |
"%Y-%m-%d %H:%M:%S")
|
|
139 |
handler = logging.FileHandler(opts.log_file)
|
|
140 |
handler.setFormatter(formatter)
|
|
141 |
logger.addHandler(handler)
|
|
142 |
handler_logger = logger
|
|
143 |
|
|
144 |
# # Become a daemon:
|
|
145 |
# # Redirect stdout and stderr to handler.stream to catch
|
|
146 |
# # early errors in the daemonization process [e.g., pidfile creation]
|
|
147 |
# # which will otherwise go to /dev/null.
|
|
148 |
# daemon_context = daemon.DaemonContext(
|
|
149 |
# pidfile=pidf,
|
|
150 |
# umask=022,
|
|
151 |
# stdout=handler.stream,
|
|
152 |
# stderr=handler.stream,
|
|
153 |
# files_preserve=[handler.stream])
|
|
154 |
# daemon_context.open()
|
|
155 |
# logger.info("Became a daemon")
|
|
156 |
#
|
|
157 |
# # Catch signals to ensure graceful shutdown
|
|
158 |
# signal(SIGINT, fatal_signal_handler)
|
|
159 |
# signal(SIGTERM, fatal_signal_handler)
|
|
160 |
|
|
161 |
#Init connection to RabbitMQ
|
|
162 |
conn = BrokerConnection(hostname="localhost", port=5672,userid="guest",
|
|
163 |
password="guest",virtual_host="/")
|
|
164 |
publisher = Publisher(connection=conn, exchange="ganeti",
|
|
165 |
routing_key="importer")
|
|
166 |
|
|
167 |
|
|
168 |
# Monitor the Ganeti job queue, create and push notifications
|
|
169 |
wm = pyinotify.WatchManager()
|
|
170 |
mask = pyinotify.EventsCodes.ALL_FLAGS["IN_CLOSE_WRITE"]
|
|
171 |
handler = JobFileHandler(logger, publisher)
|
|
172 |
notifier = pyinotify.Notifier(wm, handler)
|
|
173 |
|
|
174 |
try:
|
|
175 |
# Fail if adding the inotify() watch fails for any reason
|
|
176 |
res = wm.add_watch(constants.QUEUE_DIR, mask)
|
|
177 |
if res[constants.QUEUE_DIR] < 0:
|
|
178 |
raise Exception("pyinotify add_watch returned negative watch descriptor")
|
|
179 |
|
|
180 |
logger.info("Now watching %s" % constants.QUEUE_DIR)
|
|
181 |
|
|
182 |
while True: # loop forever
|
|
183 |
# process the queue of events as explained above
|
|
184 |
notifier.process_events()
|
|
185 |
if notifier.check_events():
|
|
186 |
# read notified events and enqeue them
|
|
187 |
notifier.read_events()
|
|
188 |
except SystemExit:
|
|
189 |
logger.info("SystemExit")
|
|
190 |
except:
|
|
191 |
logger.exception("Caught exception, terminating")
|
|
192 |
finally:
|
|
193 |
# destroy the inotify's instance on this interrupt (stop monitoring)
|
|
194 |
notifier.stop()
|
|
195 |
# mark the 0mq thread as stopped, wake it up so that it notices
|
|
196 |
raise
|
|
197 |
|
|
198 |
if __name__ == "__main__":
|
|
199 |
sys.exit(main())
|
|
200 |
|
|
201 |
# vim: set ts=4 sts=4 sw=4 et ai :
|