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1 | 685ee993 | Iustin Pop | #!/usr/bin/python -u |
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2 | ffeffa1d | Iustin Pop | # |
3 | ffeffa1d | Iustin Pop | |
4 | ffeffa1d | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc. |
5 | ffeffa1d | Iustin Pop | # |
6 | ffeffa1d | Iustin Pop | # This program is free software; you can redistribute it and/or modify |
7 | ffeffa1d | Iustin Pop | # it under the terms of the GNU General Public License as published by |
8 | ffeffa1d | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or |
9 | ffeffa1d | Iustin Pop | # (at your option) any later version. |
10 | ffeffa1d | Iustin Pop | # |
11 | ffeffa1d | Iustin Pop | # This program is distributed in the hope that it will be useful, but |
12 | ffeffa1d | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | ffeffa1d | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | ffeffa1d | Iustin Pop | # General Public License for more details. |
15 | ffeffa1d | Iustin Pop | # |
16 | ffeffa1d | Iustin Pop | # You should have received a copy of the GNU General Public License |
17 | ffeffa1d | Iustin Pop | # along with this program; if not, write to the Free Software |
18 | ffeffa1d | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
19 | ffeffa1d | Iustin Pop | # 02110-1301, USA. |
20 | ffeffa1d | Iustin Pop | |
21 | ffeffa1d | Iustin Pop | |
22 | ffeffa1d | Iustin Pop | """Master daemon program. |
23 | ffeffa1d | Iustin Pop | |
24 | ffeffa1d | Iustin Pop | Some classes deviates from the standard style guide since the |
25 | ffeffa1d | Iustin Pop | inheritance from parent classes requires it. |
26 | ffeffa1d | Iustin Pop | |
27 | ffeffa1d | Iustin Pop | """ |
28 | ffeffa1d | Iustin Pop | |
29 | ffeffa1d | Iustin Pop | |
30 | d823660a | Guido Trotter | import os |
31 | c1f2901b | Iustin Pop | import sys |
32 | ffeffa1d | Iustin Pop | import SocketServer |
33 | ffeffa1d | Iustin Pop | import time |
34 | ffeffa1d | Iustin Pop | import collections |
35 | ffeffa1d | Iustin Pop | import signal |
36 | 96cb3986 | Michael Hanselmann | import logging |
37 | ffeffa1d | Iustin Pop | |
38 | c1f2901b | Iustin Pop | from optparse import OptionParser |
39 | ffeffa1d | Iustin Pop | |
40 | 39dcf2ef | Guido Trotter | from ganeti import config |
41 | ffeffa1d | Iustin Pop | from ganeti import constants |
42 | 04ccf5e9 | Guido Trotter | from ganeti import daemon |
43 | ffeffa1d | Iustin Pop | from ganeti import mcpu |
44 | ffeffa1d | Iustin Pop | from ganeti import opcodes |
45 | ffeffa1d | Iustin Pop | from ganeti import jqueue |
46 | 39dcf2ef | Guido Trotter | from ganeti import locking |
47 | ffeffa1d | Iustin Pop | from ganeti import luxi |
48 | ffeffa1d | Iustin Pop | from ganeti import utils |
49 | c1f2901b | Iustin Pop | from ganeti import errors |
50 | c1f2901b | Iustin Pop | from ganeti import ssconf |
51 | 23e50d39 | Michael Hanselmann | from ganeti import workerpool |
52 | b1b6ea87 | Iustin Pop | from ganeti import rpc |
53 | d7cdb55d | Iustin Pop | from ganeti import bootstrap |
54 | dd36d829 | Iustin Pop | from ganeti import serializer |
55 | c1f2901b | Iustin Pop | |
56 | c1f2901b | Iustin Pop | |
57 | 23e50d39 | Michael Hanselmann | CLIENT_REQUEST_WORKERS = 16 |
58 | 23e50d39 | Michael Hanselmann | |
59 | c1f2901b | Iustin Pop | EXIT_NOTMASTER = constants.EXIT_NOTMASTER |
60 | c1f2901b | Iustin Pop | EXIT_NODESETUP_ERROR = constants.EXIT_NODESETUP_ERROR |
61 | ffeffa1d | Iustin Pop | |
62 | ffeffa1d | Iustin Pop | |
63 | 23e50d39 | Michael Hanselmann | class ClientRequestWorker(workerpool.BaseWorker): |
64 | 23e50d39 | Michael Hanselmann | def RunTask(self, server, request, client_address): |
65 | 23e50d39 | Michael Hanselmann | """Process the request. |
66 | 23e50d39 | Michael Hanselmann | |
67 | 23e50d39 | Michael Hanselmann | This is copied from the code in ThreadingMixIn. |
68 | 23e50d39 | Michael Hanselmann | |
69 | 23e50d39 | Michael Hanselmann | """ |
70 | 23e50d39 | Michael Hanselmann | try: |
71 | 23e50d39 | Michael Hanselmann | server.finish_request(request, client_address) |
72 | 23e50d39 | Michael Hanselmann | server.close_request(request) |
73 | 23e50d39 | Michael Hanselmann | except: |
74 | 23e50d39 | Michael Hanselmann | server.handle_error(request, client_address) |
75 | 23e50d39 | Michael Hanselmann | server.close_request(request) |
76 | 23e50d39 | Michael Hanselmann | |
77 | 23e50d39 | Michael Hanselmann | |
78 | ffeffa1d | Iustin Pop | class IOServer(SocketServer.UnixStreamServer): |
79 | ffeffa1d | Iustin Pop | """IO thread class. |
80 | ffeffa1d | Iustin Pop | |
81 | ffeffa1d | Iustin Pop | This class takes care of initializing the other threads, setting |
82 | ffeffa1d | Iustin Pop | signal handlers (which are processed only in this thread), and doing |
83 | ffeffa1d | Iustin Pop | cleanup at shutdown. |
84 | ffeffa1d | Iustin Pop | |
85 | ffeffa1d | Iustin Pop | """ |
86 | 9113300d | Michael Hanselmann | def __init__(self, address, rqhandler): |
87 | ce862cd5 | Guido Trotter | """IOServer constructor |
88 | ce862cd5 | Guido Trotter | |
89 | c41eea6e | Iustin Pop | @param address: the address to bind this IOServer to |
90 | c41eea6e | Iustin Pop | @param rqhandler: RequestHandler type object |
91 | ce862cd5 | Guido Trotter | |
92 | ce862cd5 | Guido Trotter | """ |
93 | ffeffa1d | Iustin Pop | SocketServer.UnixStreamServer.__init__(self, address, rqhandler) |
94 | 50a3fbb2 | Michael Hanselmann | |
95 | 50a3fbb2 | Michael Hanselmann | # We'll only start threads once we've forked. |
96 | 9113300d | Michael Hanselmann | self.context = None |
97 | 23e50d39 | Michael Hanselmann | self.request_workers = None |
98 | 50a3fbb2 | Michael Hanselmann | |
99 | 50a3fbb2 | Michael Hanselmann | def setup_queue(self): |
100 | 9113300d | Michael Hanselmann | self.context = GanetiContext() |
101 | 23e50d39 | Michael Hanselmann | self.request_workers = workerpool.WorkerPool(CLIENT_REQUEST_WORKERS, |
102 | 23e50d39 | Michael Hanselmann | ClientRequestWorker) |
103 | ffeffa1d | Iustin Pop | |
104 | ffeffa1d | Iustin Pop | def process_request(self, request, client_address): |
105 | 23e50d39 | Michael Hanselmann | """Add task to workerpool to process request. |
106 | ffeffa1d | Iustin Pop | |
107 | ffeffa1d | Iustin Pop | """ |
108 | 23e50d39 | Michael Hanselmann | self.request_workers.AddTask(self, request, client_address) |
109 | ffeffa1d | Iustin Pop | |
110 | 6b5e5018 | Guido Trotter | @utils.SignalHandled([signal.SIGINT, signal.SIGTERM]) |
111 | 6b5e5018 | Guido Trotter | def serve_forever(self, signal_handlers=None): |
112 | ffeffa1d | Iustin Pop | """Handle one request at a time until told to quit.""" |
113 | 6b5e5018 | Guido Trotter | assert isinstance(signal_handlers, dict) and \ |
114 | 6b5e5018 | Guido Trotter | len(signal_handlers) > 0, \ |
115 | 6b5e5018 | Guido Trotter | "Broken SignalHandled decorator" |
116 | 6b5e5018 | Guido Trotter | # Since we use SignalHandled only once, the resulting dict will map all |
117 | 6b5e5018 | Guido Trotter | # signals to the same handler. We'll just use the first one. |
118 | 6b5e5018 | Guido Trotter | sighandler = signal_handlers.values()[0] |
119 | 6b5e5018 | Guido Trotter | while not sighandler.called: |
120 | 6b5e5018 | Guido Trotter | self.handle_request() |
121 | c1f2901b | Iustin Pop | |
122 | c1f2901b | Iustin Pop | def server_cleanup(self): |
123 | c1f2901b | Iustin Pop | """Cleanup the server. |
124 | c1f2901b | Iustin Pop | |
125 | c1f2901b | Iustin Pop | This involves shutting down the processor threads and the master |
126 | c1f2901b | Iustin Pop | socket. |
127 | c1f2901b | Iustin Pop | |
128 | c1f2901b | Iustin Pop | """ |
129 | 50a3fbb2 | Michael Hanselmann | try: |
130 | 50a3fbb2 | Michael Hanselmann | self.server_close() |
131 | 50a3fbb2 | Michael Hanselmann | finally: |
132 | 23e50d39 | Michael Hanselmann | if self.request_workers: |
133 | 36088c4c | Michael Hanselmann | self.request_workers.TerminateWorkers() |
134 | 9113300d | Michael Hanselmann | if self.context: |
135 | 9113300d | Michael Hanselmann | self.context.jobqueue.Shutdown() |
136 | ffeffa1d | Iustin Pop | |
137 | ffeffa1d | Iustin Pop | |
138 | ffeffa1d | Iustin Pop | class ClientRqHandler(SocketServer.BaseRequestHandler): |
139 | ffeffa1d | Iustin Pop | """Client handler""" |
140 | ffeffa1d | Iustin Pop | EOM = '\3' |
141 | ffeffa1d | Iustin Pop | READ_SIZE = 4096 |
142 | ffeffa1d | Iustin Pop | |
143 | ffeffa1d | Iustin Pop | def setup(self): |
144 | ffeffa1d | Iustin Pop | self._buffer = "" |
145 | ffeffa1d | Iustin Pop | self._msgs = collections.deque() |
146 | ffeffa1d | Iustin Pop | self._ops = ClientOps(self.server) |
147 | ffeffa1d | Iustin Pop | |
148 | ffeffa1d | Iustin Pop | def handle(self): |
149 | ffeffa1d | Iustin Pop | while True: |
150 | ffeffa1d | Iustin Pop | msg = self.read_message() |
151 | ffeffa1d | Iustin Pop | if msg is None: |
152 | d21d09d6 | Iustin Pop | logging.debug("client closed connection") |
153 | ffeffa1d | Iustin Pop | break |
154 | 3d8548c4 | Michael Hanselmann | |
155 | dd36d829 | Iustin Pop | request = serializer.LoadJson(msg) |
156 | 3d8548c4 | Michael Hanselmann | logging.debug("request: %s", request) |
157 | ffeffa1d | Iustin Pop | if not isinstance(request, dict): |
158 | 3d8548c4 | Michael Hanselmann | logging.error("wrong request received: %s", msg) |
159 | ffeffa1d | Iustin Pop | break |
160 | 3d8548c4 | Michael Hanselmann | |
161 | 3d8548c4 | Michael Hanselmann | method = request.get(luxi.KEY_METHOD, None) |
162 | 3d8548c4 | Michael Hanselmann | args = request.get(luxi.KEY_ARGS, None) |
163 | 3d8548c4 | Michael Hanselmann | if method is None or args is None: |
164 | 3d8548c4 | Michael Hanselmann | logging.error("no method or args in request") |
165 | ffeffa1d | Iustin Pop | break |
166 | 3d8548c4 | Michael Hanselmann | |
167 | 3d8548c4 | Michael Hanselmann | success = False |
168 | 3d8548c4 | Michael Hanselmann | try: |
169 | 3d8548c4 | Michael Hanselmann | result = self._ops.handle_request(method, args) |
170 | 3d8548c4 | Michael Hanselmann | success = True |
171 | 6797ec29 | Iustin Pop | except errors.GenericError, err: |
172 | 6797ec29 | Iustin Pop | success = False |
173 | 6956e9cd | Iustin Pop | result = errors.EncodeException(err) |
174 | 3d8548c4 | Michael Hanselmann | except: |
175 | 3d8548c4 | Michael Hanselmann | logging.error("Unexpected exception", exc_info=True) |
176 | 3d8548c4 | Michael Hanselmann | err = sys.exc_info() |
177 | 3d8548c4 | Michael Hanselmann | result = "Caught exception: %s" % str(err[1]) |
178 | 3d8548c4 | Michael Hanselmann | |
179 | 3d8548c4 | Michael Hanselmann | response = { |
180 | 3d8548c4 | Michael Hanselmann | luxi.KEY_SUCCESS: success, |
181 | 3d8548c4 | Michael Hanselmann | luxi.KEY_RESULT: result, |
182 | 3d8548c4 | Michael Hanselmann | } |
183 | 3d8548c4 | Michael Hanselmann | logging.debug("response: %s", response) |
184 | dd36d829 | Iustin Pop | self.send_message(serializer.DumpJson(response)) |
185 | ffeffa1d | Iustin Pop | |
186 | ffeffa1d | Iustin Pop | def read_message(self): |
187 | ffeffa1d | Iustin Pop | while not self._msgs: |
188 | ffeffa1d | Iustin Pop | data = self.request.recv(self.READ_SIZE) |
189 | ffeffa1d | Iustin Pop | if not data: |
190 | ffeffa1d | Iustin Pop | return None |
191 | ffeffa1d | Iustin Pop | new_msgs = (self._buffer + data).split(self.EOM) |
192 | ffeffa1d | Iustin Pop | self._buffer = new_msgs.pop() |
193 | ffeffa1d | Iustin Pop | self._msgs.extend(new_msgs) |
194 | ffeffa1d | Iustin Pop | return self._msgs.popleft() |
195 | ffeffa1d | Iustin Pop | |
196 | ffeffa1d | Iustin Pop | def send_message(self, msg): |
197 | ffeffa1d | Iustin Pop | #print "sending", msg |
198 | 6096ee13 | Michael Hanselmann | # TODO: sendall is not guaranteed to send everything |
199 | ffeffa1d | Iustin Pop | self.request.sendall(msg + self.EOM) |
200 | ffeffa1d | Iustin Pop | |
201 | ffeffa1d | Iustin Pop | |
202 | ffeffa1d | Iustin Pop | class ClientOps: |
203 | ffeffa1d | Iustin Pop | """Class holding high-level client operations.""" |
204 | ffeffa1d | Iustin Pop | def __init__(self, server): |
205 | ffeffa1d | Iustin Pop | self.server = server |
206 | ffeffa1d | Iustin Pop | |
207 | 0bbe448c | Michael Hanselmann | def handle_request(self, method, args): |
208 | 9113300d | Michael Hanselmann | queue = self.server.context.jobqueue |
209 | 0bbe448c | Michael Hanselmann | |
210 | 0bbe448c | Michael Hanselmann | # TODO: Parameter validation |
211 | 0bbe448c | Michael Hanselmann | |
212 | 0bbe448c | Michael Hanselmann | if method == luxi.REQ_SUBMIT_JOB: |
213 | e566ddbd | Iustin Pop | logging.info("Received new job") |
214 | 0bbe448c | Michael Hanselmann | ops = [opcodes.OpCode.LoadOpCode(state) for state in args] |
215 | 4c848b18 | Michael Hanselmann | return queue.SubmitJob(ops) |
216 | ffeffa1d | Iustin Pop | |
217 | 2971c913 | Iustin Pop | if method == luxi.REQ_SUBMIT_MANY_JOBS: |
218 | 2971c913 | Iustin Pop | logging.info("Received multiple jobs") |
219 | 2971c913 | Iustin Pop | jobs = [] |
220 | 2971c913 | Iustin Pop | for ops in args: |
221 | 2971c913 | Iustin Pop | jobs.append([opcodes.OpCode.LoadOpCode(state) for state in ops]) |
222 | 2971c913 | Iustin Pop | return queue.SubmitManyJobs(jobs) |
223 | 2971c913 | Iustin Pop | |
224 | 0bbe448c | Michael Hanselmann | elif method == luxi.REQ_CANCEL_JOB: |
225 | 3a2c7775 | Michael Hanselmann | job_id = args |
226 | e566ddbd | Iustin Pop | logging.info("Received job cancel request for %s", job_id) |
227 | 0bbe448c | Michael Hanselmann | return queue.CancelJob(job_id) |
228 | ffeffa1d | Iustin Pop | |
229 | 0bbe448c | Michael Hanselmann | elif method == luxi.REQ_ARCHIVE_JOB: |
230 | 3a2c7775 | Michael Hanselmann | job_id = args |
231 | e566ddbd | Iustin Pop | logging.info("Received job archive request for %s", job_id) |
232 | 0bbe448c | Michael Hanselmann | return queue.ArchiveJob(job_id) |
233 | 0bbe448c | Michael Hanselmann | |
234 | 07cd723a | Iustin Pop | elif method == luxi.REQ_AUTOARCHIVE_JOBS: |
235 | f8ad5591 | Michael Hanselmann | (age, timeout) = args |
236 | e566ddbd | Iustin Pop | logging.info("Received job autoarchive request for age %s, timeout %s", |
237 | e566ddbd | Iustin Pop | age, timeout) |
238 | f8ad5591 | Michael Hanselmann | return queue.AutoArchiveJobs(age, timeout) |
239 | 07cd723a | Iustin Pop | |
240 | dfe57c22 | Michael Hanselmann | elif method == luxi.REQ_WAIT_FOR_JOB_CHANGE: |
241 | 5c735209 | Iustin Pop | (job_id, fields, prev_job_info, prev_log_serial, timeout) = args |
242 | e566ddbd | Iustin Pop | logging.info("Received job poll request for %s", job_id) |
243 | 6c5a7090 | Michael Hanselmann | return queue.WaitForJobChanges(job_id, fields, prev_job_info, |
244 | 5c735209 | Iustin Pop | prev_log_serial, timeout) |
245 | dfe57c22 | Michael Hanselmann | |
246 | 0bbe448c | Michael Hanselmann | elif method == luxi.REQ_QUERY_JOBS: |
247 | 0bbe448c | Michael Hanselmann | (job_ids, fields) = args |
248 | e566ddbd | Iustin Pop | if isinstance(job_ids, (tuple, list)) and job_ids: |
249 | e566ddbd | Iustin Pop | msg = ", ".join(job_ids) |
250 | e566ddbd | Iustin Pop | else: |
251 | e566ddbd | Iustin Pop | msg = str(job_ids) |
252 | e566ddbd | Iustin Pop | logging.info("Received job query request for %s", msg) |
253 | 0bbe448c | Michael Hanselmann | return queue.QueryJobs(job_ids, fields) |
254 | 0bbe448c | Michael Hanselmann | |
255 | ee6c7b94 | Michael Hanselmann | elif method == luxi.REQ_QUERY_INSTANCES: |
256 | ec79568d | Iustin Pop | (names, fields, use_locking) = args |
257 | e566ddbd | Iustin Pop | logging.info("Received instance query request for %s", names) |
258 | 77921a95 | Iustin Pop | if use_locking: |
259 | 77921a95 | Iustin Pop | raise errors.OpPrereqError("Sync queries are not allowed") |
260 | ec79568d | Iustin Pop | op = opcodes.OpQueryInstances(names=names, output_fields=fields, |
261 | ec79568d | Iustin Pop | use_locking=use_locking) |
262 | ee6c7b94 | Michael Hanselmann | return self._Query(op) |
263 | ee6c7b94 | Michael Hanselmann | |
264 | 02f7fe54 | Michael Hanselmann | elif method == luxi.REQ_QUERY_NODES: |
265 | ec79568d | Iustin Pop | (names, fields, use_locking) = args |
266 | e566ddbd | Iustin Pop | logging.info("Received node query request for %s", names) |
267 | 77921a95 | Iustin Pop | if use_locking: |
268 | 77921a95 | Iustin Pop | raise errors.OpPrereqError("Sync queries are not allowed") |
269 | ec79568d | Iustin Pop | op = opcodes.OpQueryNodes(names=names, output_fields=fields, |
270 | ec79568d | Iustin Pop | use_locking=use_locking) |
271 | 02f7fe54 | Michael Hanselmann | return self._Query(op) |
272 | 02f7fe54 | Michael Hanselmann | |
273 | 32f93223 | Michael Hanselmann | elif method == luxi.REQ_QUERY_EXPORTS: |
274 | ec79568d | Iustin Pop | nodes, use_locking = args |
275 | 77921a95 | Iustin Pop | if use_locking: |
276 | 77921a95 | Iustin Pop | raise errors.OpPrereqError("Sync queries are not allowed") |
277 | e566ddbd | Iustin Pop | logging.info("Received exports query request") |
278 | ec79568d | Iustin Pop | op = opcodes.OpQueryExports(nodes=nodes, use_locking=use_locking) |
279 | 32f93223 | Michael Hanselmann | return self._Query(op) |
280 | 32f93223 | Michael Hanselmann | |
281 | ae5849b5 | Michael Hanselmann | elif method == luxi.REQ_QUERY_CONFIG_VALUES: |
282 | ae5849b5 | Michael Hanselmann | fields = args |
283 | e566ddbd | Iustin Pop | logging.info("Received config values query request for %s", fields) |
284 | ae5849b5 | Michael Hanselmann | op = opcodes.OpQueryConfigValues(output_fields=fields) |
285 | ae5849b5 | Michael Hanselmann | return self._Query(op) |
286 | ae5849b5 | Michael Hanselmann | |
287 | 66baeccc | Iustin Pop | elif method == luxi.REQ_QUERY_CLUSTER_INFO: |
288 | e566ddbd | Iustin Pop | logging.info("Received cluster info query request") |
289 | 66baeccc | Iustin Pop | op = opcodes.OpQueryClusterInfo() |
290 | 66baeccc | Iustin Pop | return self._Query(op) |
291 | 66baeccc | Iustin Pop | |
292 | 3ccafd0e | Iustin Pop | elif method == luxi.REQ_QUEUE_SET_DRAIN_FLAG: |
293 | 3ccafd0e | Iustin Pop | drain_flag = args |
294 | e566ddbd | Iustin Pop | logging.info("Received queue drain flag change request to %s", |
295 | e566ddbd | Iustin Pop | drain_flag) |
296 | 3ccafd0e | Iustin Pop | return queue.SetDrainFlag(drain_flag) |
297 | 3ccafd0e | Iustin Pop | |
298 | 05e50653 | Michael Hanselmann | elif method == luxi.REQ_SET_WATCHER_PAUSE: |
299 | 05e50653 | Michael Hanselmann | (until, ) = args |
300 | 05e50653 | Michael Hanselmann | |
301 | 05e50653 | Michael Hanselmann | if until is None: |
302 | 05e50653 | Michael Hanselmann | logging.info("Received request to no longer pause the watcher") |
303 | 05e50653 | Michael Hanselmann | else: |
304 | 05e50653 | Michael Hanselmann | if not isinstance(until, (int, float)): |
305 | 05e50653 | Michael Hanselmann | raise TypeError("Duration must be an integer or float") |
306 | 05e50653 | Michael Hanselmann | |
307 | 05e50653 | Michael Hanselmann | if until < time.time(): |
308 | 05e50653 | Michael Hanselmann | raise errors.GenericError("Unable to set pause end time in the past") |
309 | 05e50653 | Michael Hanselmann | |
310 | 05e50653 | Michael Hanselmann | logging.info("Received request to pause the watcher until %s", until) |
311 | 05e50653 | Michael Hanselmann | |
312 | 05e50653 | Michael Hanselmann | return _SetWatcherPause(until) |
313 | 05e50653 | Michael Hanselmann | |
314 | 0bbe448c | Michael Hanselmann | else: |
315 | e566ddbd | Iustin Pop | logging.info("Received invalid request '%s'", method) |
316 | e566ddbd | Iustin Pop | raise ValueError("Invalid operation '%s'" % method) |
317 | ffeffa1d | Iustin Pop | |
318 | ee6c7b94 | Michael Hanselmann | def _Query(self, op): |
319 | ee6c7b94 | Michael Hanselmann | """Runs the specified opcode and returns the result. |
320 | ee6c7b94 | Michael Hanselmann | |
321 | ee6c7b94 | Michael Hanselmann | """ |
322 | ee6c7b94 | Michael Hanselmann | proc = mcpu.Processor(self.server.context) |
323 | 031a3e57 | Michael Hanselmann | return proc.ExecOpCode(op, None) |
324 | ee6c7b94 | Michael Hanselmann | |
325 | ffeffa1d | Iustin Pop | |
326 | 39dcf2ef | Guido Trotter | class GanetiContext(object): |
327 | 39dcf2ef | Guido Trotter | """Context common to all ganeti threads. |
328 | 39dcf2ef | Guido Trotter | |
329 | 39dcf2ef | Guido Trotter | This class creates and holds common objects shared by all threads. |
330 | 39dcf2ef | Guido Trotter | |
331 | 39dcf2ef | Guido Trotter | """ |
332 | 39dcf2ef | Guido Trotter | _instance = None |
333 | 39dcf2ef | Guido Trotter | |
334 | 39dcf2ef | Guido Trotter | def __init__(self): |
335 | 39dcf2ef | Guido Trotter | """Constructs a new GanetiContext object. |
336 | 39dcf2ef | Guido Trotter | |
337 | 39dcf2ef | Guido Trotter | There should be only a GanetiContext object at any time, so this |
338 | 39dcf2ef | Guido Trotter | function raises an error if this is not the case. |
339 | 39dcf2ef | Guido Trotter | |
340 | 39dcf2ef | Guido Trotter | """ |
341 | 39dcf2ef | Guido Trotter | assert self.__class__._instance is None, "double GanetiContext instance" |
342 | 39dcf2ef | Guido Trotter | |
343 | 9113300d | Michael Hanselmann | # Create global configuration object |
344 | 39dcf2ef | Guido Trotter | self.cfg = config.ConfigWriter() |
345 | 9113300d | Michael Hanselmann | |
346 | 9113300d | Michael Hanselmann | # Locking manager |
347 | 984f7c32 | Guido Trotter | self.glm = locking.GanetiLockManager( |
348 | 39dcf2ef | Guido Trotter | self.cfg.GetNodeList(), |
349 | 39dcf2ef | Guido Trotter | self.cfg.GetInstanceList()) |
350 | 39dcf2ef | Guido Trotter | |
351 | 9113300d | Michael Hanselmann | # Job queue |
352 | 9113300d | Michael Hanselmann | self.jobqueue = jqueue.JobQueue(self) |
353 | 9113300d | Michael Hanselmann | |
354 | 39dcf2ef | Guido Trotter | # setting this also locks the class against attribute modifications |
355 | 39dcf2ef | Guido Trotter | self.__class__._instance = self |
356 | 39dcf2ef | Guido Trotter | |
357 | 39dcf2ef | Guido Trotter | def __setattr__(self, name, value): |
358 | 39dcf2ef | Guido Trotter | """Setting GanetiContext attributes is forbidden after initialization. |
359 | 39dcf2ef | Guido Trotter | |
360 | 39dcf2ef | Guido Trotter | """ |
361 | 39dcf2ef | Guido Trotter | assert self.__class__._instance is None, "Attempt to modify Ganeti Context" |
362 | 39dcf2ef | Guido Trotter | object.__setattr__(self, name, value) |
363 | 39dcf2ef | Guido Trotter | |
364 | d8470559 | Michael Hanselmann | def AddNode(self, node): |
365 | d8470559 | Michael Hanselmann | """Adds a node to the configuration and lock manager. |
366 | d8470559 | Michael Hanselmann | |
367 | d8470559 | Michael Hanselmann | """ |
368 | d8470559 | Michael Hanselmann | # Add it to the configuration |
369 | d8470559 | Michael Hanselmann | self.cfg.AddNode(node) |
370 | d8470559 | Michael Hanselmann | |
371 | c36176cc | Michael Hanselmann | # If preseeding fails it'll not be added |
372 | 99aabbed | Iustin Pop | self.jobqueue.AddNode(node) |
373 | c36176cc | Michael Hanselmann | |
374 | d8470559 | Michael Hanselmann | # Add the new node to the Ganeti Lock Manager |
375 | d8470559 | Michael Hanselmann | self.glm.add(locking.LEVEL_NODE, node.name) |
376 | d8470559 | Michael Hanselmann | |
377 | d8470559 | Michael Hanselmann | def ReaddNode(self, node): |
378 | d8470559 | Michael Hanselmann | """Updates a node that's already in the configuration |
379 | d8470559 | Michael Hanselmann | |
380 | d8470559 | Michael Hanselmann | """ |
381 | c36176cc | Michael Hanselmann | # Synchronize the queue again |
382 | 99aabbed | Iustin Pop | self.jobqueue.AddNode(node) |
383 | d8470559 | Michael Hanselmann | |
384 | d8470559 | Michael Hanselmann | def RemoveNode(self, name): |
385 | d8470559 | Michael Hanselmann | """Removes a node from the configuration and lock manager. |
386 | d8470559 | Michael Hanselmann | |
387 | d8470559 | Michael Hanselmann | """ |
388 | d8470559 | Michael Hanselmann | # Remove node from configuration |
389 | d8470559 | Michael Hanselmann | self.cfg.RemoveNode(name) |
390 | d8470559 | Michael Hanselmann | |
391 | c36176cc | Michael Hanselmann | # Notify job queue |
392 | c36176cc | Michael Hanselmann | self.jobqueue.RemoveNode(name) |
393 | c36176cc | Michael Hanselmann | |
394 | d8470559 | Michael Hanselmann | # Remove the node from the Ganeti Lock Manager |
395 | d8470559 | Michael Hanselmann | self.glm.remove(locking.LEVEL_NODE, name) |
396 | d8470559 | Michael Hanselmann | |
397 | 39dcf2ef | Guido Trotter | |
398 | 05e50653 | Michael Hanselmann | def _SetWatcherPause(until): |
399 | 05e50653 | Michael Hanselmann | """Creates or removes the watcher pause file. |
400 | 05e50653 | Michael Hanselmann | |
401 | 05e50653 | Michael Hanselmann | @type until: None or int |
402 | 05e50653 | Michael Hanselmann | @param until: Unix timestamp saying until when the watcher shouldn't run |
403 | 05e50653 | Michael Hanselmann | |
404 | 05e50653 | Michael Hanselmann | """ |
405 | 05e50653 | Michael Hanselmann | if until is None: |
406 | 05e50653 | Michael Hanselmann | utils.RemoveFile(constants.WATCHER_PAUSEFILE) |
407 | 05e50653 | Michael Hanselmann | else: |
408 | 05e50653 | Michael Hanselmann | utils.WriteFile(constants.WATCHER_PAUSEFILE, |
409 | 05e50653 | Michael Hanselmann | data="%d\n" % (until, )) |
410 | 05e50653 | Michael Hanselmann | |
411 | 28b498cd | Michael Hanselmann | return until |
412 | 28b498cd | Michael Hanselmann | |
413 | 05e50653 | Michael Hanselmann | |
414 | 36205981 | Iustin Pop | def CheckAgreement(): |
415 | 36205981 | Iustin Pop | """Check the agreement on who is the master. |
416 | 36205981 | Iustin Pop | |
417 | 36205981 | Iustin Pop | The function uses a very simple algorithm: we must get more positive |
418 | 36205981 | Iustin Pop | than negative answers. Since in most of the cases we are the master, |
419 | 36205981 | Iustin Pop | we'll use our own config file for getting the node list. In the |
420 | 36205981 | Iustin Pop | future we could collect the current node list from our (possibly |
421 | 36205981 | Iustin Pop | obsolete) known nodes. |
422 | 36205981 | Iustin Pop | |
423 | d7cdb55d | Iustin Pop | In order to account for cold-start of all nodes, we retry for up to |
424 | d7cdb55d | Iustin Pop | a minute until we get a real answer as the top-voted one. If the |
425 | d7cdb55d | Iustin Pop | nodes are more out-of-sync, for now manual startup of the master |
426 | d7cdb55d | Iustin Pop | should be attempted. |
427 | d7cdb55d | Iustin Pop | |
428 | d7cdb55d | Iustin Pop | Note that for a even number of nodes cluster, we need at least half |
429 | d7cdb55d | Iustin Pop | of the nodes (beside ourselves) to vote for us. This creates a |
430 | d7cdb55d | Iustin Pop | problem on two-node clusters, since in this case we require the |
431 | d7cdb55d | Iustin Pop | other node to be up too to confirm our status. |
432 | d7cdb55d | Iustin Pop | |
433 | 36205981 | Iustin Pop | """ |
434 | 36205981 | Iustin Pop | myself = utils.HostInfo().name |
435 | 36205981 | Iustin Pop | #temp instantiation of a config writer, used only to get the node list |
436 | 36205981 | Iustin Pop | cfg = config.ConfigWriter() |
437 | 36205981 | Iustin Pop | node_list = cfg.GetNodeList() |
438 | 36205981 | Iustin Pop | del cfg |
439 | d7cdb55d | Iustin Pop | retries = 6 |
440 | d7cdb55d | Iustin Pop | while retries > 0: |
441 | d7cdb55d | Iustin Pop | votes = bootstrap.GatherMasterVotes(node_list) |
442 | d7cdb55d | Iustin Pop | if not votes: |
443 | d7cdb55d | Iustin Pop | # empty node list, this is a one node cluster |
444 | d7cdb55d | Iustin Pop | return True |
445 | d7cdb55d | Iustin Pop | if votes[0][0] is None: |
446 | d7cdb55d | Iustin Pop | retries -= 1 |
447 | d7cdb55d | Iustin Pop | time.sleep(10) |
448 | 36205981 | Iustin Pop | continue |
449 | d7cdb55d | Iustin Pop | break |
450 | d7cdb55d | Iustin Pop | if retries == 0: |
451 | e09fdcfa | Iustin Pop | logging.critical("Cluster inconsistent, most of the nodes didn't answer" |
452 | e09fdcfa | Iustin Pop | " after multiple retries. Aborting startup") |
453 | e09fdcfa | Iustin Pop | return False |
454 | d7cdb55d | Iustin Pop | # here a real node is at the top of the list |
455 | d7cdb55d | Iustin Pop | all_votes = sum(item[1] for item in votes) |
456 | d7cdb55d | Iustin Pop | top_node, top_votes = votes[0] |
457 | 8a20c732 | Michael Hanselmann | |
458 | d7cdb55d | Iustin Pop | result = False |
459 | d7cdb55d | Iustin Pop | if top_node != myself: |
460 | d7cdb55d | Iustin Pop | logging.critical("It seems we are not the master (top-voted node" |
461 | bbe19c17 | Iustin Pop | " is %s with %d out of %d votes)", top_node, top_votes, |
462 | bbe19c17 | Iustin Pop | all_votes) |
463 | d7cdb55d | Iustin Pop | elif top_votes < all_votes - top_votes: |
464 | 36205981 | Iustin Pop | logging.critical("It seems we are not the master (%d votes for," |
465 | d7cdb55d | Iustin Pop | " %d votes against)", top_votes, all_votes - top_votes) |
466 | d7cdb55d | Iustin Pop | else: |
467 | d7cdb55d | Iustin Pop | result = True |
468 | d7cdb55d | Iustin Pop | |
469 | d7cdb55d | Iustin Pop | return result |
470 | 36205981 | Iustin Pop | |
471 | 6c948699 | Michael Hanselmann | |
472 | ed0efaa5 | Michael Hanselmann | def CheckAgreementWithRpc(): |
473 | 4331f6cd | Michael Hanselmann | rpc.Init() |
474 | 4331f6cd | Michael Hanselmann | try: |
475 | ed0efaa5 | Michael Hanselmann | return CheckAgreement() |
476 | 4331f6cd | Michael Hanselmann | finally: |
477 | 4331f6cd | Michael Hanselmann | rpc.Shutdown() |
478 | ffeffa1d | Iustin Pop | |
479 | c1f2901b | Iustin Pop | |
480 | 8a20c732 | Michael Hanselmann | def _RunInSeparateProcess(fn): |
481 | 8a20c732 | Michael Hanselmann | """Runs a function in a separate process. |
482 | 8a20c732 | Michael Hanselmann | |
483 | 8a20c732 | Michael Hanselmann | Note: Only boolean return values are supported. |
484 | 8a20c732 | Michael Hanselmann | |
485 | 8a20c732 | Michael Hanselmann | @type fn: callable |
486 | 8a20c732 | Michael Hanselmann | @param fn: Function to be called |
487 | 8a20c732 | Michael Hanselmann | @rtype: bool |
488 | 8a20c732 | Michael Hanselmann | |
489 | 8a20c732 | Michael Hanselmann | """ |
490 | 8a20c732 | Michael Hanselmann | pid = os.fork() |
491 | 8a20c732 | Michael Hanselmann | if pid == 0: |
492 | 8a20c732 | Michael Hanselmann | # Child process |
493 | 8a20c732 | Michael Hanselmann | try: |
494 | 8a20c732 | Michael Hanselmann | # Call function |
495 | 8a20c732 | Michael Hanselmann | result = int(bool(fn())) |
496 | 8a20c732 | Michael Hanselmann | assert result in (0, 1) |
497 | 8a20c732 | Michael Hanselmann | except: |
498 | 8a20c732 | Michael Hanselmann | logging.exception("Error while calling function in separate process") |
499 | 8a20c732 | Michael Hanselmann | # 0 and 1 are reserved for the return value |
500 | 8a20c732 | Michael Hanselmann | result = 33 |
501 | 8a20c732 | Michael Hanselmann | |
502 | 8a20c732 | Michael Hanselmann | os._exit(result) |
503 | 8a20c732 | Michael Hanselmann | |
504 | 8a20c732 | Michael Hanselmann | # Parent process |
505 | 8a20c732 | Michael Hanselmann | |
506 | 8a20c732 | Michael Hanselmann | # Avoid zombies and check exit code |
507 | 8a20c732 | Michael Hanselmann | (_, status) = os.waitpid(pid, 0) |
508 | 8a20c732 | Michael Hanselmann | |
509 | 8a20c732 | Michael Hanselmann | if os.WIFSIGNALED(status): |
510 | 8a20c732 | Michael Hanselmann | signum = os.WTERMSIG(status) |
511 | 8a20c732 | Michael Hanselmann | exitcode = None |
512 | 8a20c732 | Michael Hanselmann | else: |
513 | 8a20c732 | Michael Hanselmann | signum = None |
514 | 8a20c732 | Michael Hanselmann | exitcode = os.WEXITSTATUS(status) |
515 | 8a20c732 | Michael Hanselmann | |
516 | 8a20c732 | Michael Hanselmann | if not (exitcode in (0, 1) and signum is None): |
517 | 8a20c732 | Michael Hanselmann | logging.error("Child program failed (code=%s, signal=%s)", |
518 | 8a20c732 | Michael Hanselmann | exitcode, signum) |
519 | 8a20c732 | Michael Hanselmann | sys.exit(constants.EXIT_FAILURE) |
520 | 8a20c732 | Michael Hanselmann | |
521 | 8a20c732 | Michael Hanselmann | return bool(exitcode) |
522 | 8a20c732 | Michael Hanselmann | |
523 | 8a20c732 | Michael Hanselmann | |
524 | ed0efaa5 | Michael Hanselmann | def CheckMasterd(options, args): |
525 | ed0efaa5 | Michael Hanselmann | """Initial checks whether to run or exit with a failure. |
526 | ed0efaa5 | Michael Hanselmann | |
527 | ed0efaa5 | Michael Hanselmann | """ |
528 | ed0efaa5 | Michael Hanselmann | ssconf.CheckMaster(options.debug) |
529 | ed0efaa5 | Michael Hanselmann | |
530 | ed0efaa5 | Michael Hanselmann | # If CheckMaster didn't fail we believe we are the master, but we have to |
531 | ed0efaa5 | Michael Hanselmann | # confirm with the other nodes. |
532 | ed0efaa5 | Michael Hanselmann | if options.no_voting: |
533 | ed0efaa5 | Michael Hanselmann | if options.yes_do_it: |
534 | ed0efaa5 | Michael Hanselmann | return |
535 | ed0efaa5 | Michael Hanselmann | |
536 | ed0efaa5 | Michael Hanselmann | sys.stdout.write("The 'no voting' option has been selected.\n") |
537 | ed0efaa5 | Michael Hanselmann | sys.stdout.write("This is dangerous, please confirm by" |
538 | ed0efaa5 | Michael Hanselmann | " typing uppercase 'yes': ") |
539 | ed0efaa5 | Michael Hanselmann | sys.stdout.flush() |
540 | ed0efaa5 | Michael Hanselmann | |
541 | ed0efaa5 | Michael Hanselmann | confirmation = sys.stdin.readline().strip() |
542 | ed0efaa5 | Michael Hanselmann | if confirmation != "YES": |
543 | ed0efaa5 | Michael Hanselmann | print >>sys.stderr, "Aborting." |
544 | ed0efaa5 | Michael Hanselmann | sys.exit(constants.EXIT_FAILURE) |
545 | ed0efaa5 | Michael Hanselmann | |
546 | ed0efaa5 | Michael Hanselmann | return |
547 | ed0efaa5 | Michael Hanselmann | |
548 | ed0efaa5 | Michael Hanselmann | # CheckAgreement uses RPC and threads, hence it needs to be run in a separate |
549 | ed0efaa5 | Michael Hanselmann | # process before we call utils.Daemonize in the current process. |
550 | ed0efaa5 | Michael Hanselmann | if not _RunInSeparateProcess(CheckAgreementWithRpc): |
551 | ed0efaa5 | Michael Hanselmann | sys.exit(constants.EXIT_FAILURE) |
552 | ed0efaa5 | Michael Hanselmann | |
553 | ed0efaa5 | Michael Hanselmann | |
554 | 6c948699 | Michael Hanselmann | def ExecMasterd (options, args): |
555 | 6c948699 | Michael Hanselmann | """Main master daemon function, executed with the PID file held. |
556 | 3b316acb | Iustin Pop | |
557 | 04ccf5e9 | Guido Trotter | """ |
558 | 04ccf5e9 | Guido Trotter | # This is safe to do as the pid file guarantees against |
559 | 04ccf5e9 | Guido Trotter | # concurrent execution. |
560 | 04ccf5e9 | Guido Trotter | utils.RemoveFile(constants.MASTER_SOCKET) |
561 | b1b6ea87 | Iustin Pop | |
562 | 04ccf5e9 | Guido Trotter | master = IOServer(constants.MASTER_SOCKET, ClientRqHandler) |
563 | 04ccf5e9 | Guido Trotter | try: |
564 | 15486fa7 | Michael Hanselmann | rpc.Init() |
565 | 4331f6cd | Michael Hanselmann | try: |
566 | 15486fa7 | Michael Hanselmann | # activate ip |
567 | b2890442 | Guido Trotter | master_node = ssconf.SimpleStore().GetMasterNode() |
568 | 3583908a | Guido Trotter | result = rpc.RpcRunner.call_node_start_master(master_node, False, False) |
569 | 3cebe102 | Michael Hanselmann | msg = result.fail_msg |
570 | b726aff0 | Iustin Pop | if msg: |
571 | b726aff0 | Iustin Pop | logging.error("Can't activate master IP address: %s", msg) |
572 | 15486fa7 | Michael Hanselmann | |
573 | 15486fa7 | Michael Hanselmann | master.setup_queue() |
574 | 15486fa7 | Michael Hanselmann | try: |
575 | 15486fa7 | Michael Hanselmann | master.serve_forever() |
576 | 15486fa7 | Michael Hanselmann | finally: |
577 | 15486fa7 | Michael Hanselmann | master.server_cleanup() |
578 | 4331f6cd | Michael Hanselmann | finally: |
579 | 15486fa7 | Michael Hanselmann | rpc.Shutdown() |
580 | a4af651e | Iustin Pop | finally: |
581 | 227647ac | Guido Trotter | utils.RemoveFile(constants.MASTER_SOCKET) |
582 | a4af651e | Iustin Pop | |
583 | ffeffa1d | Iustin Pop | |
584 | 04ccf5e9 | Guido Trotter | def main(): |
585 | 04ccf5e9 | Guido Trotter | """Main function""" |
586 | 04ccf5e9 | Guido Trotter | parser = OptionParser(description="Ganeti master daemon", |
587 | 04ccf5e9 | Guido Trotter | usage="%prog [-f] [-d]", |
588 | 04ccf5e9 | Guido Trotter | version="%%prog (ganeti) %s" % |
589 | 04ccf5e9 | Guido Trotter | constants.RELEASE_VERSION) |
590 | 04ccf5e9 | Guido Trotter | parser.add_option("--no-voting", dest="no_voting", |
591 | 04ccf5e9 | Guido Trotter | help="Do not check that the nodes agree on this node" |
592 | 04ccf5e9 | Guido Trotter | " being the master and start the daemon unconditionally", |
593 | 04ccf5e9 | Guido Trotter | default=False, action="store_true") |
594 | 04ccf5e9 | Guido Trotter | parser.add_option("--yes-do-it", dest="yes_do_it", |
595 | 04ccf5e9 | Guido Trotter | help="Override interactive check for --no-voting", |
596 | 04ccf5e9 | Guido Trotter | default=False, action="store_true") |
597 | 04ccf5e9 | Guido Trotter | dirs = [(constants.RUN_GANETI_DIR, constants.RUN_DIRS_MODE), |
598 | 04ccf5e9 | Guido Trotter | (constants.SOCKET_DIR, constants.SOCKET_DIR_MODE), |
599 | 04ccf5e9 | Guido Trotter | ] |
600 | 04ccf5e9 | Guido Trotter | daemon.GenericMain(constants.MASTERD, parser, dirs, |
601 | 6c948699 | Michael Hanselmann | CheckMasterd, ExecMasterd) |
602 | 6c948699 | Michael Hanselmann | |
603 | 04ccf5e9 | Guido Trotter | |
604 | ffeffa1d | Iustin Pop | if __name__ == "__main__": |
605 | ffeffa1d | Iustin Pop | main() |