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1 | b84cb9a0 | Guido Trotter | #!/usr/bin/python |
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2 | b84cb9a0 | Guido Trotter | # |
3 | b84cb9a0 | Guido Trotter | |
4 | b84cb9a0 | Guido Trotter | # Copyright (C) 2009, Google Inc. |
5 | b84cb9a0 | Guido Trotter | # |
6 | b84cb9a0 | Guido Trotter | # This program is free software; you can redistribute it and/or modify |
7 | b84cb9a0 | Guido Trotter | # it under the terms of the GNU General Public License as published by |
8 | b84cb9a0 | Guido Trotter | # the Free Software Foundation; either version 2 of the License, or |
9 | b84cb9a0 | Guido Trotter | # (at your option) any later version. |
10 | b84cb9a0 | Guido Trotter | # |
11 | b84cb9a0 | Guido Trotter | # This program is distributed in the hope that it will be useful, but |
12 | b84cb9a0 | Guido Trotter | # WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | b84cb9a0 | Guido Trotter | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | b84cb9a0 | Guido Trotter | # General Public License for more details. |
15 | b84cb9a0 | Guido Trotter | # |
16 | b84cb9a0 | Guido Trotter | # You should have received a copy of the GNU General Public License |
17 | b84cb9a0 | Guido Trotter | # along with this program; if not, write to the Free Software |
18 | b84cb9a0 | Guido Trotter | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
19 | b84cb9a0 | Guido Trotter | # 02110-1301, USA. |
20 | b84cb9a0 | Guido Trotter | |
21 | b84cb9a0 | Guido Trotter | |
22 | b84cb9a0 | Guido Trotter | """Ganeti configuration daemon |
23 | b84cb9a0 | Guido Trotter | |
24 | b84cb9a0 | Guido Trotter | Ganeti-confd is a daemon to query master candidates for configuration values. |
25 | b84cb9a0 | Guido Trotter | It uses UDP+HMAC for authentication with a global cluster key. |
26 | b84cb9a0 | Guido Trotter | |
27 | b84cb9a0 | Guido Trotter | """ |
28 | b84cb9a0 | Guido Trotter | |
29 | b84cb9a0 | Guido Trotter | import os |
30 | b84cb9a0 | Guido Trotter | import sys |
31 | b84cb9a0 | Guido Trotter | import logging |
32 | b84cb9a0 | Guido Trotter | import pyinotify |
33 | e2be81cf | Guido Trotter | import time |
34 | b84cb9a0 | Guido Trotter | |
35 | b84cb9a0 | Guido Trotter | from optparse import OptionParser |
36 | b84cb9a0 | Guido Trotter | |
37 | e1081705 | Guido Trotter | from ganeti import asyncnotifier |
38 | e1081705 | Guido Trotter | from ganeti import confd |
39 | e1081705 | Guido Trotter | from ganeti.confd import server as confd_server |
40 | b84cb9a0 | Guido Trotter | from ganeti import constants |
41 | b84cb9a0 | Guido Trotter | from ganeti import errors |
42 | b84cb9a0 | Guido Trotter | from ganeti import daemon |
43 | 0648750e | Michael Hanselmann | from ganeti import utils |
44 | b84cb9a0 | Guido Trotter | from ganeti import ssconf |
45 | b84cb9a0 | Guido Trotter | |
46 | b84cb9a0 | Guido Trotter | |
47 | 5f3269fc | Guido Trotter | class ConfdAsyncUDPServer(daemon.AsyncUDPSocket): |
48 | b84cb9a0 | Guido Trotter | """The confd udp server, suitable for use with asyncore. |
49 | b84cb9a0 | Guido Trotter | |
50 | b84cb9a0 | Guido Trotter | """ |
51 | b84cb9a0 | Guido Trotter | def __init__(self, bind_address, port, processor): |
52 | b84cb9a0 | Guido Trotter | """Constructor for ConfdAsyncUDPServer |
53 | b84cb9a0 | Guido Trotter | |
54 | b84cb9a0 | Guido Trotter | @type bind_address: string |
55 | b84cb9a0 | Guido Trotter | @param bind_address: socket bind address ('' for all) |
56 | b84cb9a0 | Guido Trotter | @type port: int |
57 | b84cb9a0 | Guido Trotter | @param port: udp port |
58 | b84cb9a0 | Guido Trotter | @type processor: L{confd.server.ConfdProcessor} |
59 | fe759e4c | Guido Trotter | @param processor: ConfdProcessor to use to handle queries |
60 | b84cb9a0 | Guido Trotter | |
61 | b84cb9a0 | Guido Trotter | """ |
62 | 5f3269fc | Guido Trotter | daemon.AsyncUDPSocket.__init__(self) |
63 | b84cb9a0 | Guido Trotter | self.bind_address = bind_address |
64 | b84cb9a0 | Guido Trotter | self.port = port |
65 | b84cb9a0 | Guido Trotter | self.processor = processor |
66 | b84cb9a0 | Guido Trotter | self.bind((bind_address, port)) |
67 | b84cb9a0 | Guido Trotter | logging.debug("listening on ('%s':%d)" % (bind_address, port)) |
68 | b84cb9a0 | Guido Trotter | |
69 | 5f3269fc | Guido Trotter | # this method is overriding a daemon.AsyncUDPSocket method |
70 | 5f3269fc | Guido Trotter | def handle_datagram(self, payload_in, ip, port): |
71 | 9748ab35 | Guido Trotter | try: |
72 | e1081705 | Guido Trotter | query = confd.UnpackMagic(payload_in) |
73 | 9748ab35 | Guido Trotter | except errors.ConfdMagicError, err: |
74 | 9748ab35 | Guido Trotter | logging.debug(err) |
75 | a3758ab2 | Guido Trotter | return |
76 | a3758ab2 | Guido Trotter | |
77 | a3758ab2 | Guido Trotter | answer = self.processor.ExecQuery(query, ip, port) |
78 | a3758ab2 | Guido Trotter | if answer is not None: |
79 | 86488201 | Guido Trotter | try: |
80 | e1081705 | Guido Trotter | self.enqueue_send(ip, port, confd.PackMagic(answer)) |
81 | 86488201 | Guido Trotter | except errors.UdpDataSizeError: |
82 | 86488201 | Guido Trotter | logging.error("Reply too big to fit in an udp packet.") |
83 | b84cb9a0 | Guido Trotter | |
84 | b84cb9a0 | Guido Trotter | |
85 | b84cb9a0 | Guido Trotter | class ConfdInotifyEventHandler(pyinotify.ProcessEvent): |
86 | b84cb9a0 | Guido Trotter | |
87 | 4afe249b | Guido Trotter | def __init__(self, watch_manager, callback, |
88 | b84cb9a0 | Guido Trotter | file=constants.CLUSTER_CONF_FILE): |
89 | b84cb9a0 | Guido Trotter | """Constructor for ConfdInotifyEventHandler |
90 | b84cb9a0 | Guido Trotter | |
91 | b84cb9a0 | Guido Trotter | @type watch_manager: L{pyinotify.WatchManager} |
92 | b84cb9a0 | Guido Trotter | @param watch_manager: ganeti-confd inotify watch manager |
93 | 4afe249b | Guido Trotter | @type callback: function accepting a boolean |
94 | 4afe249b | Guido Trotter | @param callback: function to call when an inotify event happens |
95 | b84cb9a0 | Guido Trotter | @type file: string |
96 | b84cb9a0 | Guido Trotter | @param file: config file to watch |
97 | b84cb9a0 | Guido Trotter | |
98 | b84cb9a0 | Guido Trotter | """ |
99 | b84cb9a0 | Guido Trotter | # no need to call the parent's constructor |
100 | b84cb9a0 | Guido Trotter | self.watch_manager = watch_manager |
101 | 4afe249b | Guido Trotter | self.callback = callback |
102 | b84cb9a0 | Guido Trotter | self.mask = pyinotify.EventsCodes.IN_IGNORED | \ |
103 | b84cb9a0 | Guido Trotter | pyinotify.EventsCodes.IN_MODIFY |
104 | b84cb9a0 | Guido Trotter | self.file = file |
105 | 46c9b31d | Guido Trotter | self.watch_handle = None |
106 | b84cb9a0 | Guido Trotter | |
107 | 46c9b31d | Guido Trotter | def enable(self): |
108 | 46c9b31d | Guido Trotter | """Watch the given file |
109 | b84cb9a0 | Guido Trotter | |
110 | b84cb9a0 | Guido Trotter | """ |
111 | 46c9b31d | Guido Trotter | if self.watch_handle is None: |
112 | 46c9b31d | Guido Trotter | result = self.watch_manager.add_watch(self.file, self.mask) |
113 | 46c9b31d | Guido Trotter | if not self.file in result or result[self.file] <= 0: |
114 | ef4ca33b | Guido Trotter | raise errors.InotifyError("Could not add inotify watcher") |
115 | 46c9b31d | Guido Trotter | else: |
116 | 46c9b31d | Guido Trotter | self.watch_handle = result[self.file] |
117 | 46c9b31d | Guido Trotter | |
118 | 46c9b31d | Guido Trotter | def disable(self): |
119 | 46c9b31d | Guido Trotter | """Stop watching the given file |
120 | 46c9b31d | Guido Trotter | |
121 | 46c9b31d | Guido Trotter | """ |
122 | 46c9b31d | Guido Trotter | if self.watch_handle is not None: |
123 | 46c9b31d | Guido Trotter | result = self.watch_manager.rm_watch(self.watch_handle) |
124 | 46c9b31d | Guido Trotter | if result[self.watch_handle]: |
125 | 46c9b31d | Guido Trotter | self.watch_handle = None |
126 | b84cb9a0 | Guido Trotter | |
127 | b84cb9a0 | Guido Trotter | def process_IN_IGNORED(self, event): |
128 | b84cb9a0 | Guido Trotter | # Due to the fact that we monitor just for the cluster config file (rather |
129 | b84cb9a0 | Guido Trotter | # than for the whole data dir) when the file is replaced with another one |
130 | b84cb9a0 | Guido Trotter | # (which is what happens normally in ganeti) we're going to receive an |
131 | b84cb9a0 | Guido Trotter | # IN_IGNORED event from inotify, because of the file removal (which is |
132 | b84cb9a0 | Guido Trotter | # contextual with the replacement). In such a case we need to create |
133 | b84cb9a0 | Guido Trotter | # another watcher for the "new" file. |
134 | b84cb9a0 | Guido Trotter | logging.debug("Received 'ignored' inotify event for %s" % event.path) |
135 | 46c9b31d | Guido Trotter | self.watch_handle = None |
136 | b84cb9a0 | Guido Trotter | |
137 | b84cb9a0 | Guido Trotter | try: |
138 | b84cb9a0 | Guido Trotter | # Since the kernel believes the file we were interested in is gone, it's |
139 | b84cb9a0 | Guido Trotter | # not going to notify us of any other events, until we set up, here, the |
140 | b84cb9a0 | Guido Trotter | # new watch. This is not a race condition, though, since we're anyway |
141 | b84cb9a0 | Guido Trotter | # going to realod the file after setting up the new watch. |
142 | 4afe249b | Guido Trotter | self.callback(False) |
143 | b84cb9a0 | Guido Trotter | except errors.ConfdFatalError, err: |
144 | b84cb9a0 | Guido Trotter | logging.critical("Critical error, shutting down: %s" % err) |
145 | b84cb9a0 | Guido Trotter | sys.exit(constants.EXIT_FAILURE) |
146 | b84cb9a0 | Guido Trotter | except: |
147 | b84cb9a0 | Guido Trotter | # we need to catch any exception here, log it, but proceed, because even |
148 | b84cb9a0 | Guido Trotter | # if we failed handling a single request, we still want the confd to |
149 | b84cb9a0 | Guido Trotter | # continue working. |
150 | b84cb9a0 | Guido Trotter | logging.error("Unexpected exception", exc_info=True) |
151 | b84cb9a0 | Guido Trotter | |
152 | b84cb9a0 | Guido Trotter | def process_IN_MODIFY(self, event): |
153 | b84cb9a0 | Guido Trotter | # This gets called when the config file is modified. Note that this doesn't |
154 | b84cb9a0 | Guido Trotter | # usually happen in Ganeti, as the config file is normally replaced by a |
155 | b84cb9a0 | Guido Trotter | # new one, at filesystem level, rather than actually modified (see |
156 | b84cb9a0 | Guido Trotter | # utils.WriteFile) |
157 | b84cb9a0 | Guido Trotter | logging.debug("Received 'modify' inotify event for %s" % event.path) |
158 | b84cb9a0 | Guido Trotter | |
159 | b84cb9a0 | Guido Trotter | try: |
160 | 4afe249b | Guido Trotter | self.callback(True) |
161 | b84cb9a0 | Guido Trotter | except errors.ConfdFatalError, err: |
162 | b84cb9a0 | Guido Trotter | logging.critical("Critical error, shutting down: %s" % err) |
163 | b84cb9a0 | Guido Trotter | sys.exit(constants.EXIT_FAILURE) |
164 | b84cb9a0 | Guido Trotter | except: |
165 | b84cb9a0 | Guido Trotter | # we need to catch any exception here, log it, but proceed, because even |
166 | b84cb9a0 | Guido Trotter | # if we failed handling a single request, we still want the confd to |
167 | b84cb9a0 | Guido Trotter | # continue working. |
168 | b84cb9a0 | Guido Trotter | logging.error("Unexpected exception", exc_info=True) |
169 | b84cb9a0 | Guido Trotter | |
170 | b84cb9a0 | Guido Trotter | def process_default(self, event): |
171 | b84cb9a0 | Guido Trotter | logging.error("Received unhandled inotify event: %s" % event) |
172 | b84cb9a0 | Guido Trotter | |
173 | b84cb9a0 | Guido Trotter | |
174 | 562bee4d | Guido Trotter | class ConfdConfigurationReloader(object): |
175 | 562bee4d | Guido Trotter | """Logic to control when to reload the ganeti configuration |
176 | 562bee4d | Guido Trotter | |
177 | 562bee4d | Guido Trotter | This class is able to alter between inotify and polling, to rate-limit the |
178 | 562bee4d | Guido Trotter | number of reloads. When using inotify it also supports a fallback timed |
179 | 562bee4d | Guido Trotter | check, to verify that the reload hasn't failed. |
180 | 562bee4d | Guido Trotter | |
181 | 562bee4d | Guido Trotter | """ |
182 | 05f1ebf3 | Guido Trotter | def __init__(self, processor, mainloop): |
183 | 562bee4d | Guido Trotter | """Constructor for ConfdConfigurationReloader |
184 | 562bee4d | Guido Trotter | |
185 | 05f1ebf3 | Guido Trotter | @type processor: L{confd.server.ConfdProcessor} |
186 | 05f1ebf3 | Guido Trotter | @param processor: ganeti-confd ConfdProcessor |
187 | e2be81cf | Guido Trotter | @type mainloop: L{daemon.Mainloop} |
188 | e2be81cf | Guido Trotter | @param mainloop: ganeti-confd mainloop |
189 | 562bee4d | Guido Trotter | |
190 | 562bee4d | Guido Trotter | """ |
191 | 05f1ebf3 | Guido Trotter | self.processor = processor |
192 | e2be81cf | Guido Trotter | self.mainloop = mainloop |
193 | e2be81cf | Guido Trotter | |
194 | c6259dbc | Guido Trotter | self.polling = True |
195 | e2be81cf | Guido Trotter | self.last_notification = 0 |
196 | 562bee4d | Guido Trotter | |
197 | 562bee4d | Guido Trotter | # Asyncronous inotify handler for config changes |
198 | 562bee4d | Guido Trotter | self.wm = pyinotify.WatchManager() |
199 | 4afe249b | Guido Trotter | self.inotify_handler = ConfdInotifyEventHandler(self.wm, self.OnInotify) |
200 | e1081705 | Guido Trotter | self.notifier = asyncnotifier.AsyncNotifier(self.wm, self.inotify_handler) |
201 | 4afe249b | Guido Trotter | |
202 | e2be81cf | Guido Trotter | self.timer_handle = None |
203 | e2be81cf | Guido Trotter | self._EnableTimer() |
204 | e2be81cf | Guido Trotter | |
205 | 4afe249b | Guido Trotter | def OnInotify(self, notifier_enabled): |
206 | 4afe249b | Guido Trotter | """Receive an inotify notification. |
207 | 4afe249b | Guido Trotter | |
208 | 4afe249b | Guido Trotter | @type notifier_enabled: boolean |
209 | 4afe249b | Guido Trotter | @param notifier_enabled: whether the notifier is still enabled |
210 | 4afe249b | Guido Trotter | |
211 | 4afe249b | Guido Trotter | """ |
212 | e2be81cf | Guido Trotter | current_time = time.time() |
213 | e2be81cf | Guido Trotter | time_delta = current_time - self.last_notification |
214 | e2be81cf | Guido Trotter | self.last_notification = current_time |
215 | e2be81cf | Guido Trotter | |
216 | e2be81cf | Guido Trotter | if time_delta < constants.CONFD_CONFIG_RELOAD_RATELIMIT: |
217 | e2be81cf | Guido Trotter | logging.debug("Moving from inotify mode to polling mode") |
218 | e2be81cf | Guido Trotter | self.polling = True |
219 | e2be81cf | Guido Trotter | if notifier_enabled: |
220 | 176d3122 | Guido Trotter | self.inotify_handler.disable() |
221 | e2be81cf | Guido Trotter | |
222 | e2be81cf | Guido Trotter | if not self.polling and not notifier_enabled: |
223 | ef4ca33b | Guido Trotter | try: |
224 | ef4ca33b | Guido Trotter | self.inotify_handler.enable() |
225 | ef4ca33b | Guido Trotter | except errors.InotifyError: |
226 | 22d3e184 | Guido Trotter | self.polling = True |
227 | 4afe249b | Guido Trotter | |
228 | 4afe249b | Guido Trotter | try: |
229 | 05f1ebf3 | Guido Trotter | reloaded = self.processor.reader.Reload() |
230 | 4afe249b | Guido Trotter | if reloaded: |
231 | 4afe249b | Guido Trotter | logging.info("Reloaded ganeti config") |
232 | 4afe249b | Guido Trotter | else: |
233 | 4afe249b | Guido Trotter | logging.debug("Skipped double config reload") |
234 | 4afe249b | Guido Trotter | except errors.ConfigurationError: |
235 | 22d3e184 | Guido Trotter | self.DisableConfd() |
236 | 22d3e184 | Guido Trotter | self.inotify_handler.disable() |
237 | 22d3e184 | Guido Trotter | return |
238 | 4afe249b | Guido Trotter | |
239 | e2be81cf | Guido Trotter | # Reset the timer. If we're polling it will go to the polling rate, if |
240 | e2be81cf | Guido Trotter | # we're not it will delay it again to its base safe timeout. |
241 | 22d3e184 | Guido Trotter | self._ResetTimer() |
242 | e2be81cf | Guido Trotter | |
243 | e2be81cf | Guido Trotter | def _DisableTimer(self): |
244 | e2be81cf | Guido Trotter | if self.timer_handle is not None: |
245 | e2be81cf | Guido Trotter | self.mainloop.scheduler.cancel(self.timer_handle) |
246 | e2be81cf | Guido Trotter | self.timer_handle = None |
247 | e2be81cf | Guido Trotter | |
248 | e2be81cf | Guido Trotter | def _EnableTimer(self): |
249 | e2be81cf | Guido Trotter | if self.polling: |
250 | e2be81cf | Guido Trotter | timeout = constants.CONFD_CONFIG_RELOAD_RATELIMIT |
251 | e2be81cf | Guido Trotter | else: |
252 | e2be81cf | Guido Trotter | timeout = constants.CONFD_CONFIG_RELOAD_TIMEOUT |
253 | e2be81cf | Guido Trotter | |
254 | e2be81cf | Guido Trotter | if self.timer_handle is None: |
255 | e2be81cf | Guido Trotter | self.timer_handle = self.mainloop.scheduler.enter( |
256 | e2be81cf | Guido Trotter | timeout, 1, self.OnTimer, []) |
257 | e2be81cf | Guido Trotter | |
258 | 22d3e184 | Guido Trotter | def _ResetTimer(self): |
259 | 22d3e184 | Guido Trotter | self._DisableTimer() |
260 | 22d3e184 | Guido Trotter | self._EnableTimer() |
261 | 22d3e184 | Guido Trotter | |
262 | e2be81cf | Guido Trotter | def OnTimer(self): |
263 | e2be81cf | Guido Trotter | """Function called when the timer fires |
264 | e2be81cf | Guido Trotter | |
265 | e2be81cf | Guido Trotter | """ |
266 | e2be81cf | Guido Trotter | self.timer_handle = None |
267 | 22d3e184 | Guido Trotter | reloaded = False |
268 | 22d3e184 | Guido Trotter | was_disabled = False |
269 | e2be81cf | Guido Trotter | try: |
270 | 22d3e184 | Guido Trotter | if self.processor.reader is None: |
271 | 22d3e184 | Guido Trotter | was_disabled = True |
272 | 22d3e184 | Guido Trotter | self.EnableConfd() |
273 | 22d3e184 | Guido Trotter | reloaded = True |
274 | 22d3e184 | Guido Trotter | else: |
275 | 22d3e184 | Guido Trotter | reloaded = self.processor.reader.Reload() |
276 | e2be81cf | Guido Trotter | except errors.ConfigurationError: |
277 | a544f755 | Guido Trotter | self.DisableConfd(silent=was_disabled) |
278 | 22d3e184 | Guido Trotter | return |
279 | e2be81cf | Guido Trotter | |
280 | e2be81cf | Guido Trotter | if self.polling and reloaded: |
281 | e2be81cf | Guido Trotter | logging.info("Reloaded ganeti config") |
282 | e2be81cf | Guido Trotter | elif reloaded: |
283 | e2be81cf | Guido Trotter | # We have reloaded the config files, but received no inotify event. If |
284 | e2be81cf | Guido Trotter | # an event is pending though, we just happen to have timed out before |
285 | e2be81cf | Guido Trotter | # receiving it, so this is not a problem, and we shouldn't alert |
286 | 22d3e184 | Guido Trotter | if not self.notifier.check_events() and not was_disabled: |
287 | e2be81cf | Guido Trotter | logging.warning("Config file reload at timeout (inotify failure)") |
288 | e2be81cf | Guido Trotter | elif self.polling: |
289 | e2be81cf | Guido Trotter | # We're polling, but we haven't reloaded the config: |
290 | e2be81cf | Guido Trotter | # Going back to inotify mode |
291 | e2be81cf | Guido Trotter | logging.debug("Moving from polling mode to inotify mode") |
292 | e2be81cf | Guido Trotter | self.polling = False |
293 | 22d3e184 | Guido Trotter | try: |
294 | 22d3e184 | Guido Trotter | self.inotify_handler.enable() |
295 | 22d3e184 | Guido Trotter | except errors.InotifyError: |
296 | 22d3e184 | Guido Trotter | self.polling = True |
297 | e2be81cf | Guido Trotter | else: |
298 | e2be81cf | Guido Trotter | logging.debug("Performed configuration check") |
299 | e2be81cf | Guido Trotter | |
300 | e2be81cf | Guido Trotter | self._EnableTimer() |
301 | 562bee4d | Guido Trotter | |
302 | a544f755 | Guido Trotter | def DisableConfd(self, silent=False): |
303 | 22d3e184 | Guido Trotter | """Puts confd in non-serving mode |
304 | 22d3e184 | Guido Trotter | |
305 | 22d3e184 | Guido Trotter | """ |
306 | a544f755 | Guido Trotter | if not silent: |
307 | a544f755 | Guido Trotter | logging.warning("Confd is being disabled") |
308 | 22d3e184 | Guido Trotter | self.processor.Disable() |
309 | 22d3e184 | Guido Trotter | self.polling = False |
310 | 22d3e184 | Guido Trotter | self._ResetTimer() |
311 | 22d3e184 | Guido Trotter | |
312 | 22d3e184 | Guido Trotter | def EnableConfd(self): |
313 | 22d3e184 | Guido Trotter | self.processor.Enable() |
314 | 22d3e184 | Guido Trotter | logging.warning("Confd is being enabled") |
315 | 22d3e184 | Guido Trotter | self.polling = True |
316 | 22d3e184 | Guido Trotter | self._ResetTimer() |
317 | 22d3e184 | Guido Trotter | |
318 | 562bee4d | Guido Trotter | |
319 | 6c948699 | Michael Hanselmann | def CheckConfd(options, args): |
320 | 6c948699 | Michael Hanselmann | """Initial checks whether to run exit with a failure. |
321 | b84cb9a0 | Guido Trotter | |
322 | b84cb9a0 | Guido Trotter | """ |
323 | b84cb9a0 | Guido Trotter | # TODO: collapse HMAC daemons handling in daemons GenericMain, when we'll |
324 | b84cb9a0 | Guido Trotter | # have more than one. |
325 | b84cb9a0 | Guido Trotter | if not os.path.isfile(constants.HMAC_CLUSTER_KEY): |
326 | b84cb9a0 | Guido Trotter | print >> sys.stderr, "Need HMAC key %s to run" % constants.HMAC_CLUSTER_KEY |
327 | b84cb9a0 | Guido Trotter | sys.exit(constants.EXIT_FAILURE) |
328 | b84cb9a0 | Guido Trotter | |
329 | b84cb9a0 | Guido Trotter | |
330 | 6c948699 | Michael Hanselmann | def ExecConfd(options, args): |
331 | 6c948699 | Michael Hanselmann | """Main confd function, executed with PID file held |
332 | b84cb9a0 | Guido Trotter | |
333 | b84cb9a0 | Guido Trotter | """ |
334 | f91c7223 | Guido Trotter | mainloop = daemon.Mainloop() |
335 | f91c7223 | Guido Trotter | |
336 | b84cb9a0 | Guido Trotter | # Asyncronous confd UDP server |
337 | e1081705 | Guido Trotter | processor = confd_server.ConfdProcessor() |
338 | e369f21d | Guido Trotter | try: |
339 | e369f21d | Guido Trotter | processor.Enable() |
340 | e369f21d | Guido Trotter | except errors.ConfigurationError: |
341 | 4d4a651d | Michael Hanselmann | # If enabling the processor has failed, we can still go on, but confd will |
342 | 4d4a651d | Michael Hanselmann | # be disabled |
343 | a544f755 | Guido Trotter | logging.warning("Confd is starting in disabled mode") |
344 | e369f21d | Guido Trotter | pass |
345 | b84cb9a0 | Guido Trotter | server = ConfdAsyncUDPServer(options.bind_address, options.port, processor) |
346 | b84cb9a0 | Guido Trotter | |
347 | 562bee4d | Guido Trotter | # Configuration reloader |
348 | 05f1ebf3 | Guido Trotter | reloader = ConfdConfigurationReloader(processor, mainloop) |
349 | f91c7223 | Guido Trotter | |
350 | f91c7223 | Guido Trotter | mainloop.Run() |
351 | b84cb9a0 | Guido Trotter | |
352 | b84cb9a0 | Guido Trotter | |
353 | b84cb9a0 | Guido Trotter | def main(): |
354 | b84cb9a0 | Guido Trotter | """Main function for the confd daemon. |
355 | b84cb9a0 | Guido Trotter | |
356 | b84cb9a0 | Guido Trotter | """ |
357 | b84cb9a0 | Guido Trotter | parser = OptionParser(description="Ganeti configuration daemon", |
358 | b84cb9a0 | Guido Trotter | usage="%prog [-f] [-d] [-b ADDRESS]", |
359 | b84cb9a0 | Guido Trotter | version="%%prog (ganeti) %s" % |
360 | b84cb9a0 | Guido Trotter | constants.RELEASE_VERSION) |
361 | b84cb9a0 | Guido Trotter | |
362 | b84cb9a0 | Guido Trotter | dirs = [(val, constants.RUN_DIRS_MODE) for val in constants.SUB_RUN_DIRS] |
363 | b84cb9a0 | Guido Trotter | dirs.append((constants.LOCK_DIR, 1777)) |
364 | 6c948699 | Michael Hanselmann | daemon.GenericMain(constants.CONFD, parser, dirs, CheckConfd, ExecConfd) |
365 | b84cb9a0 | Guido Trotter | |
366 | b84cb9a0 | Guido Trotter | |
367 | 6c948699 | Michael Hanselmann | if __name__ == "__main__": |
368 | b84cb9a0 | Guido Trotter | main() |