/usr/lib/python2.7/dist-packages/shinken/worker.py is in shinken-common 1.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | #!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2009-2012:
# Gabes Jean, naparuba@gmail.com
# Gerhard Lausser, Gerhard.Lausser@consol.de
# Gregory Starck, g.starck@gmail.com
# Hartmut Goebel, h.goebel@goebel-consult.de
#
# This file is part of Shinken.
#
# Shinken is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Shinken is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Shinken. If not, see <http://www.gnu.org/licenses/>.
from Queue import Empty
# In android, we should use threads, not process
is_android = True
try:
import android
except ImportError:
is_android = False
if not is_android:
from multiprocessing import Process, Queue
else:
from Queue import Queue
from threading import Thread as Process
import time
import sys
import signal
import traceback
import cStringIO
from log import logger
class Worker:
"""This class is used for poller and reactionner to work.
The worker is a process launch by theses process and read Message in a Queue
(self.s) (slave)
They launch the Check and then send the result in the Queue self.m (master)
they can die if they do not do anything (param timeout)
"""
id = 0 # None
_process = None
_mortal = None
_idletime = None
_timeout = None
_c = None
def __init__(self, id, s, returns_queue, processes_by_worker, mortal=True, timeout=300, max_plugins_output_length=8192, target=None, loaded_into='unknown'):
self.id = self.__class__.id
self.__class__.id += 1
self._mortal = mortal
self._idletime = 0
self._timeout = timeout
self.s = None
self.processes_by_worker = processes_by_worker
self._c = Queue() # Private Control queue for the Worker
# By default, take our own code
if target is None:
target = self.work
self._process = Process(target=target, args=(s, returns_queue, self._c))
self.returns_queue = returns_queue
self.max_plugins_output_length = max_plugins_output_length
self.i_am_dying = False
# Keep a trace where the worker is launch from (poller or reactionner?)
self.loaded_into = loaded_into
def is_mortal(self):
return self._mortal
def start(self):
self._process.start()
# Kill the background process
# AND close correctly the queues (input and output)
# each queue got a thread, so close it too....
def terminate(self):
# We can just terminate process, not threads
if not is_android:
self._process.terminate()
# Is we are with a Manager() way
# there should be not such functions
if hasattr(self._c, 'close'):
self._c.close()
self._c.join_thread()
if hasattr(self.s, 'close'):
self.s.close()
self.s.join_thread()
def join(self, timeout=None):
self._process.join(timeout)
def is_alive(self):
return self._process.is_alive()
def is_killable(self):
return self._mortal and self._idletime > self._timeout
def add_idletime(self, time):
self._idletime = self._idletime + time
def reset_idle(self):
self._idletime = 0
def send_message(self, msg):
self._c.put(msg)
# A zombie is immortal, so kill not be kill anymore
def set_zombie(self):
self._mortal = False
# Get new checks if less than nb_checks_max
# If no new checks got and no check in queue,
# sleep for 1 sec
# REF: doc/shinken-action-queues.png (3)
def get_new_checks(self):
try:
while(len(self.checks) < self.processes_by_worker):
#print "I", self.id, "wait for a message"
msg = self.s.get(block=False)
if msg is not None:
self.checks.append(msg.get_data())
#print "I", self.id, "I've got a message!"
except Empty, exp:
if len(self.checks) == 0:
self._idletime = self._idletime + 1
time.sleep(1)
# Maybe the Queue() is not available, if so, just return
# get back to work :)
except IOError, exp:
return
# Launch checks that are in status
# REF: doc/shinken-action-queues.png (4)
def launch_new_checks(self):
# queue
for chk in self.checks:
if chk.status == 'queue':
self._idletime = 0
r = chk.execute()
# Maybe we got a true big problem in the
# action launching
if r == 'toomanyopenfiles':
# We should die as soon as we return all checks
self.i_am_dying = True
# Check the status of checks
# if done, return message finished :)
# REF: doc/shinken-action-queues.png (5)
def manage_finished_checks(self):
to_del = []
wait_time = 1
now = time.time()
for action in self.checks:
if action.status == 'launched' and action.last_poll < now - action.wait_time:
action.check_finished(self.max_plugins_output_length)
wait_time = min(wait_time, action.wait_time)
# If action done, we can launch a new one
if action.status in ('done', 'timeout'):
to_del.append(action)
# We answer to the master
#msg = Message(id=self.id, type='Result', data=action)
try:
self.returns_queue.put(action)
except IOError, exp:
logger.error("[%d] Exiting: %s" % (self.id, exp))
sys.exit(2)
# Little sleep
self.wait_time = wait_time
for chk in to_del:
self.checks.remove(chk)
# Little sleep
time.sleep(wait_time)
# Check if our system time change. If so, change our
def check_for_system_time_change(self):
now = time.time()
difference = now - self.t_each_loop
# Now set the new value for the tick loop
self.t_each_loop = now
# return the diff if it need, of just 0
if abs(difference) > 900:
return difference
else:
return 0
# Wrapper function for work in order to catch the exception
# to see the real work, look at do_work
def work(self, s, returns_queue, c):
try:
self.do_work(s, returns_queue, c)
# Catch any exception, try to print it and exit anyway
except Exception, exp:
output = cStringIO.StringIO()
traceback.print_exc(file=output)
logger.error("Worker '%d' exit with an unmanaged exception : %s" % (self.id, output.getvalue()))
output.close()
# Ok I die now
raise
# id = id of the worker
# s = Global Queue Master->Slave
# m = Queue Slave->Master
# return_queue = queue managed by manager
# c = Control Queue for the worker
def do_work(self, s, returns_queue, c):
## restore default signal handler for the workers:
# but on android, we are a thread, so don't do it
if not is_android:
signal.signal(signal.SIGTERM, signal.SIG_DFL)
self.set_proctitle()
timeout = 1.0
self.checks = []
self.returns_queue = returns_queue
self.s = s
self.t_each_loop = time.time()
while True:
begin = time.time()
msg = None
cmsg = None
# If we are dying (big problem!) we do not
# take new jobs, we just finished the current one
if not self.i_am_dying:
# REF: doc/shinken-action-queues.png (3)
self.get_new_checks()
# REF: doc/shinken-action-queues.png (4)
self.launch_new_checks()
# REF: doc/shinken-action-queues.png (5)
self.manage_finished_checks()
# Now get order from master
try:
cmsg = c.get(block=False)
if cmsg.get_type() == 'Die':
logger.debug("[%d] Dad say we are dying..." % self.id)
break
except:
pass
if self._mortal == True and self._idletime > 2 * self._timeout:
logger.warning("[%d] Timeout, Harakiri" % self.id)
# The master must be dead and we are lonely, we must die
break
# Look if we are dying, and if we finish all current checks
# if so, we really die, our master poller will launch a new
# worker because we were too weak to manage our job :(
if len(self.checks) == 0 and self.i_am_dying:
logger.warning("[%d] I DIE because I cannot do my job as I should (too many open files?)... forgot me please." % self.id)
break
# Manage a possible time change (our avant will be change with the diff)
diff = self.check_for_system_time_change()
begin += diff
timeout -= time.time() - begin
if timeout < 0:
timeout = 1.0
def set_proctitle(self):
try:
from setproctitle import setproctitle
setproctitle("shinken-%s worker" % self.loaded_into)
except:
pass
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