root / lib / jqueue.py @ 911a495b
History | View | Annotate | Download (12 kB)
1 | 498ae1cc | Iustin Pop | #
|
---|---|---|---|
2 | 498ae1cc | Iustin Pop | #
|
3 | 498ae1cc | Iustin Pop | |
4 | 498ae1cc | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
|
5 | 498ae1cc | Iustin Pop | #
|
6 | 498ae1cc | Iustin Pop | # This program is free software; you can redistribute it and/or modify
|
7 | 498ae1cc | Iustin Pop | # it under the terms of the GNU General Public License as published by
|
8 | 498ae1cc | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
|
9 | 498ae1cc | Iustin Pop | # (at your option) any later version.
|
10 | 498ae1cc | Iustin Pop | #
|
11 | 498ae1cc | Iustin Pop | # This program is distributed in the hope that it will be useful, but
|
12 | 498ae1cc | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 | 498ae1cc | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 | 498ae1cc | Iustin Pop | # General Public License for more details.
|
15 | 498ae1cc | Iustin Pop | #
|
16 | 498ae1cc | Iustin Pop | # You should have received a copy of the GNU General Public License
|
17 | 498ae1cc | Iustin Pop | # along with this program; if not, write to the Free Software
|
18 | 498ae1cc | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
19 | 498ae1cc | Iustin Pop | # 02110-1301, USA.
|
20 | 498ae1cc | Iustin Pop | |
21 | 498ae1cc | Iustin Pop | |
22 | 498ae1cc | Iustin Pop | """Module implementing the job queue handling."""
|
23 | 498ae1cc | Iustin Pop | |
24 | f1da30e6 | Michael Hanselmann | import os |
25 | e2715f69 | Michael Hanselmann | import logging |
26 | e2715f69 | Michael Hanselmann | import threading |
27 | f1da30e6 | Michael Hanselmann | import errno |
28 | f1da30e6 | Michael Hanselmann | import re |
29 | 498ae1cc | Iustin Pop | |
30 | e2715f69 | Michael Hanselmann | from ganeti import constants |
31 | f1da30e6 | Michael Hanselmann | from ganeti import serializer |
32 | e2715f69 | Michael Hanselmann | from ganeti import workerpool |
33 | f1da30e6 | Michael Hanselmann | from ganeti import opcodes |
34 | 7a1ecaed | Iustin Pop | from ganeti import errors |
35 | e2715f69 | Michael Hanselmann | from ganeti import mcpu |
36 | 7996a135 | Iustin Pop | from ganeti import utils |
37 | e2715f69 | Michael Hanselmann | |
38 | e2715f69 | Michael Hanselmann | |
39 | e2715f69 | Michael Hanselmann | JOBQUEUE_THREADS = 5
|
40 | e2715f69 | Michael Hanselmann | |
41 | 498ae1cc | Iustin Pop | |
42 | e2715f69 | Michael Hanselmann | class _QueuedOpCode(object): |
43 | e2715f69 | Michael Hanselmann | """Encasulates an opcode object.
|
44 | e2715f69 | Michael Hanselmann |
|
45 | 307149a8 | Iustin Pop | Access is synchronized by the '_lock' attribute.
|
46 | e2715f69 | Michael Hanselmann |
|
47 | e2715f69 | Michael Hanselmann | """
|
48 | e2715f69 | Michael Hanselmann | def __init__(self, op): |
49 | f1da30e6 | Michael Hanselmann | self.__Setup(op, constants.OP_STATUS_QUEUED, None) |
50 | f1da30e6 | Michael Hanselmann | |
51 | f1da30e6 | Michael Hanselmann | def __Setup(self, input, status, result): |
52 | 307149a8 | Iustin Pop | self._lock = threading.Lock()
|
53 | f1da30e6 | Michael Hanselmann | self.input = input |
54 | f1da30e6 | Michael Hanselmann | self.status = status
|
55 | f1da30e6 | Michael Hanselmann | self.result = result
|
56 | f1da30e6 | Michael Hanselmann | |
57 | f1da30e6 | Michael Hanselmann | @classmethod
|
58 | f1da30e6 | Michael Hanselmann | def Restore(cls, state): |
59 | f1da30e6 | Michael Hanselmann | obj = object.__new__(cls)
|
60 | f1da30e6 | Michael Hanselmann | obj.__Setup(opcodes.OpCode.LoadOpCode(state["input"]),
|
61 | f1da30e6 | Michael Hanselmann | state["status"], state["result"]) |
62 | f1da30e6 | Michael Hanselmann | return obj
|
63 | f1da30e6 | Michael Hanselmann | |
64 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
65 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
66 | f1da30e6 | Michael Hanselmann | return {
|
67 | f1da30e6 | Michael Hanselmann | "input": self.input.__getstate__(), |
68 | f1da30e6 | Michael Hanselmann | "status": self.status, |
69 | f1da30e6 | Michael Hanselmann | "result": self.result, |
70 | f1da30e6 | Michael Hanselmann | } |
71 | 307149a8 | Iustin Pop | |
72 | 307149a8 | Iustin Pop | @utils.LockedMethod
|
73 | af30b2fd | Michael Hanselmann | def GetInput(self): |
74 | af30b2fd | Michael Hanselmann | """Returns the original opcode.
|
75 | af30b2fd | Michael Hanselmann |
|
76 | af30b2fd | Michael Hanselmann | """
|
77 | af30b2fd | Michael Hanselmann | return self.input |
78 | af30b2fd | Michael Hanselmann | |
79 | af30b2fd | Michael Hanselmann | @utils.LockedMethod
|
80 | 307149a8 | Iustin Pop | def SetStatus(self, status, result): |
81 | 307149a8 | Iustin Pop | """Update the opcode status and result.
|
82 | 307149a8 | Iustin Pop |
|
83 | 307149a8 | Iustin Pop | """
|
84 | 307149a8 | Iustin Pop | self.status = status
|
85 | 307149a8 | Iustin Pop | self.result = result
|
86 | 307149a8 | Iustin Pop | |
87 | 307149a8 | Iustin Pop | @utils.LockedMethod
|
88 | 307149a8 | Iustin Pop | def GetStatus(self): |
89 | 307149a8 | Iustin Pop | """Get the opcode status.
|
90 | 307149a8 | Iustin Pop |
|
91 | 307149a8 | Iustin Pop | """
|
92 | 307149a8 | Iustin Pop | return self.status |
93 | 307149a8 | Iustin Pop | |
94 | 307149a8 | Iustin Pop | @utils.LockedMethod
|
95 | 307149a8 | Iustin Pop | def GetResult(self): |
96 | 307149a8 | Iustin Pop | """Get the opcode result.
|
97 | 307149a8 | Iustin Pop |
|
98 | 307149a8 | Iustin Pop | """
|
99 | 307149a8 | Iustin Pop | return self.result |
100 | e2715f69 | Michael Hanselmann | |
101 | e2715f69 | Michael Hanselmann | |
102 | e2715f69 | Michael Hanselmann | class _QueuedJob(object): |
103 | e2715f69 | Michael Hanselmann | """In-memory job representation.
|
104 | e2715f69 | Michael Hanselmann |
|
105 | e2715f69 | Michael Hanselmann | This is what we use to track the user-submitted jobs.
|
106 | e2715f69 | Michael Hanselmann |
|
107 | e2715f69 | Michael Hanselmann | """
|
108 | f1da30e6 | Michael Hanselmann | def __init__(self, storage, job_id, ops): |
109 | e2715f69 | Michael Hanselmann | if not ops: |
110 | e2715f69 | Michael Hanselmann | # TODO
|
111 | e2715f69 | Michael Hanselmann | raise Exception("No opcodes") |
112 | e2715f69 | Michael Hanselmann | |
113 | f1da30e6 | Michael Hanselmann | self.__Setup(storage, job_id, [_QueuedOpCode(op) for op in ops]) |
114 | e2715f69 | Michael Hanselmann | |
115 | f1da30e6 | Michael Hanselmann | def __Setup(self, storage, job_id, ops): |
116 | f1da30e6 | Michael Hanselmann | self.storage = storage
|
117 | f1da30e6 | Michael Hanselmann | self.id = job_id
|
118 | f1da30e6 | Michael Hanselmann | self._ops = ops
|
119 | f1da30e6 | Michael Hanselmann | |
120 | f1da30e6 | Michael Hanselmann | @classmethod
|
121 | f1da30e6 | Michael Hanselmann | def Restore(cls, storage, state): |
122 | f1da30e6 | Michael Hanselmann | obj = object.__new__(cls)
|
123 | f1da30e6 | Michael Hanselmann | obj.__Setup(storage, state["id"],
|
124 | f1da30e6 | Michael Hanselmann | [_QueuedOpCode.Restore(op_state) for op_state in state["ops"]]) |
125 | f1da30e6 | Michael Hanselmann | return obj
|
126 | f1da30e6 | Michael Hanselmann | |
127 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
128 | f1da30e6 | Michael Hanselmann | return {
|
129 | f1da30e6 | Michael Hanselmann | "id": self.id, |
130 | f1da30e6 | Michael Hanselmann | "ops": [op.Serialize() for op in self._ops], |
131 | f1da30e6 | Michael Hanselmann | } |
132 | f1da30e6 | Michael Hanselmann | |
133 | f1da30e6 | Michael Hanselmann | def SetUnclean(self, msg): |
134 | f1da30e6 | Michael Hanselmann | try:
|
135 | f1da30e6 | Michael Hanselmann | for op in self._ops: |
136 | f1da30e6 | Michael Hanselmann | op.SetStatus(constants.OP_STATUS_ERROR, msg) |
137 | f1da30e6 | Michael Hanselmann | finally:
|
138 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
139 | e2715f69 | Michael Hanselmann | |
140 | 307149a8 | Iustin Pop | def GetStatus(self): |
141 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_QUEUED |
142 | e2715f69 | Michael Hanselmann | |
143 | e2715f69 | Michael Hanselmann | all_success = True
|
144 | e2715f69 | Michael Hanselmann | for op in self._ops: |
145 | 307149a8 | Iustin Pop | op_status = op.GetStatus() |
146 | 307149a8 | Iustin Pop | if op_status == constants.OP_STATUS_SUCCESS:
|
147 | e2715f69 | Michael Hanselmann | continue
|
148 | e2715f69 | Michael Hanselmann | |
149 | e2715f69 | Michael Hanselmann | all_success = False
|
150 | e2715f69 | Michael Hanselmann | |
151 | 307149a8 | Iustin Pop | if op_status == constants.OP_STATUS_QUEUED:
|
152 | e2715f69 | Michael Hanselmann | pass
|
153 | 307149a8 | Iustin Pop | elif op_status == constants.OP_STATUS_RUNNING:
|
154 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_RUNNING |
155 | f1da30e6 | Michael Hanselmann | elif op_status == constants.OP_STATUS_ERROR:
|
156 | f1da30e6 | Michael Hanselmann | status = constants.JOB_STATUS_ERROR |
157 | f1da30e6 | Michael Hanselmann | # The whole job fails if one opcode failed
|
158 | f1da30e6 | Michael Hanselmann | break
|
159 | e2715f69 | Michael Hanselmann | |
160 | e2715f69 | Michael Hanselmann | if all_success:
|
161 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_SUCCESS |
162 | e2715f69 | Michael Hanselmann | |
163 | e2715f69 | Michael Hanselmann | return status
|
164 | e2715f69 | Michael Hanselmann | |
165 | e2715f69 | Michael Hanselmann | def Run(self, proc): |
166 | e2715f69 | Michael Hanselmann | """Job executor.
|
167 | e2715f69 | Michael Hanselmann |
|
168 | e2715f69 | Michael Hanselmann | This functions processes a this job in the context of given processor
|
169 | e2715f69 | Michael Hanselmann | instance.
|
170 | e2715f69 | Michael Hanselmann |
|
171 | e2715f69 | Michael Hanselmann | Args:
|
172 | e2715f69 | Michael Hanselmann | - proc: Ganeti Processor to run the job with
|
173 | e2715f69 | Michael Hanselmann |
|
174 | e2715f69 | Michael Hanselmann | """
|
175 | e2715f69 | Michael Hanselmann | try:
|
176 | c8549bfd | Michael Hanselmann | count = len(self._ops) |
177 | c8549bfd | Michael Hanselmann | for idx, op in enumerate(self._ops): |
178 | e2715f69 | Michael Hanselmann | try:
|
179 | 307149a8 | Iustin Pop | logging.debug("Op %s/%s: Starting %s", idx + 1, count, op) |
180 | 307149a8 | Iustin Pop | op.SetStatus(constants.OP_STATUS_RUNNING, None)
|
181 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
182 | e2715f69 | Michael Hanselmann | |
183 | e2715f69 | Michael Hanselmann | result = proc.ExecOpCode(op.input) |
184 | e2715f69 | Michael Hanselmann | |
185 | 307149a8 | Iustin Pop | op.SetStatus(constants.OP_STATUS_SUCCESS, result) |
186 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
187 | 307149a8 | Iustin Pop | logging.debug("Op %s/%s: Successfully finished %s",
|
188 | 307149a8 | Iustin Pop | idx + 1, count, op)
|
189 | e2715f69 | Michael Hanselmann | except Exception, err: |
190 | f1da30e6 | Michael Hanselmann | try:
|
191 | f1da30e6 | Michael Hanselmann | op.SetStatus(constants.OP_STATUS_ERROR, str(err))
|
192 | f1da30e6 | Michael Hanselmann | logging.debug("Op %s/%s: Error in %s", idx + 1, count, op) |
193 | f1da30e6 | Michael Hanselmann | finally:
|
194 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
195 | e2715f69 | Michael Hanselmann | raise
|
196 | e2715f69 | Michael Hanselmann | |
197 | e2715f69 | Michael Hanselmann | except errors.GenericError, err:
|
198 | e2715f69 | Michael Hanselmann | logging.error("ganeti exception %s", exc_info=err)
|
199 | e2715f69 | Michael Hanselmann | except Exception, err: |
200 | e2715f69 | Michael Hanselmann | logging.error("unhandled exception %s", exc_info=err)
|
201 | e2715f69 | Michael Hanselmann | except:
|
202 | e2715f69 | Michael Hanselmann | logging.error("unhandled unknown exception %s", exc_info=err)
|
203 | e2715f69 | Michael Hanselmann | |
204 | e2715f69 | Michael Hanselmann | |
205 | e2715f69 | Michael Hanselmann | class _JobQueueWorker(workerpool.BaseWorker): |
206 | e2715f69 | Michael Hanselmann | def RunTask(self, job): |
207 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s processing job %s",
|
208 | e2715f69 | Michael Hanselmann | self.worker_id, job.id)
|
209 | e2715f69 | Michael Hanselmann | # TODO: feedback function
|
210 | e2715f69 | Michael Hanselmann | proc = mcpu.Processor(self.pool.context, feedback=lambda x: None) |
211 | e2715f69 | Michael Hanselmann | try:
|
212 | e2715f69 | Michael Hanselmann | job.Run(proc) |
213 | e2715f69 | Michael Hanselmann | finally:
|
214 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s finished job %s, status = %s",
|
215 | e2715f69 | Michael Hanselmann | self.worker_id, job.id, job.GetStatus())
|
216 | e2715f69 | Michael Hanselmann | |
217 | e2715f69 | Michael Hanselmann | |
218 | e2715f69 | Michael Hanselmann | class _JobQueueWorkerPool(workerpool.WorkerPool): |
219 | e2715f69 | Michael Hanselmann | def __init__(self, context): |
220 | e2715f69 | Michael Hanselmann | super(_JobQueueWorkerPool, self).__init__(JOBQUEUE_THREADS, |
221 | e2715f69 | Michael Hanselmann | _JobQueueWorker) |
222 | e2715f69 | Michael Hanselmann | self.context = context
|
223 | e2715f69 | Michael Hanselmann | |
224 | e2715f69 | Michael Hanselmann | |
225 | f1da30e6 | Michael Hanselmann | class JobStorage(object): |
226 | 911a495b | Iustin Pop | _RE_JOB_FILE = re.compile(r"^job-(\d+)$")
|
227 | f1da30e6 | Michael Hanselmann | |
228 | f1da30e6 | Michael Hanselmann | def __init__(self): |
229 | f1da30e6 | Michael Hanselmann | self._lock = threading.Lock()
|
230 | f1da30e6 | Michael Hanselmann | |
231 | f1da30e6 | Michael Hanselmann | # Make sure our directory exists
|
232 | f1da30e6 | Michael Hanselmann | try:
|
233 | f1da30e6 | Michael Hanselmann | os.mkdir(constants.QUEUE_DIR, 0700)
|
234 | f1da30e6 | Michael Hanselmann | except OSError, err: |
235 | f1da30e6 | Michael Hanselmann | if err.errno not in (errno.EEXIST, ): |
236 | f1da30e6 | Michael Hanselmann | raise
|
237 | f1da30e6 | Michael Hanselmann | |
238 | f1da30e6 | Michael Hanselmann | # Get queue lock
|
239 | f1da30e6 | Michael Hanselmann | self.lock_fd = open(constants.JOB_QUEUE_LOCK_FILE, "w") |
240 | f1da30e6 | Michael Hanselmann | try:
|
241 | f1da30e6 | Michael Hanselmann | utils.LockFile(self.lock_fd)
|
242 | f1da30e6 | Michael Hanselmann | except:
|
243 | f1da30e6 | Michael Hanselmann | self.lock_fd.close()
|
244 | f1da30e6 | Michael Hanselmann | raise
|
245 | f1da30e6 | Michael Hanselmann | |
246 | f1da30e6 | Michael Hanselmann | # Read version
|
247 | f1da30e6 | Michael Hanselmann | try:
|
248 | f1da30e6 | Michael Hanselmann | version_fd = open(constants.JOB_QUEUE_VERSION_FILE, "r") |
249 | f1da30e6 | Michael Hanselmann | except IOError, err: |
250 | f1da30e6 | Michael Hanselmann | if err.errno not in (errno.ENOENT, ): |
251 | f1da30e6 | Michael Hanselmann | raise
|
252 | f1da30e6 | Michael Hanselmann | |
253 | f1da30e6 | Michael Hanselmann | # Setup a new queue
|
254 | f1da30e6 | Michael Hanselmann | self._InitQueueUnlocked()
|
255 | f1da30e6 | Michael Hanselmann | |
256 | f1da30e6 | Michael Hanselmann | # Try to open again
|
257 | f1da30e6 | Michael Hanselmann | version_fd = open(constants.JOB_QUEUE_VERSION_FILE, "r") |
258 | f1da30e6 | Michael Hanselmann | |
259 | f1da30e6 | Michael Hanselmann | try:
|
260 | f1da30e6 | Michael Hanselmann | # Try to read version
|
261 | f1da30e6 | Michael Hanselmann | version = int(version_fd.read(128)) |
262 | f1da30e6 | Michael Hanselmann | |
263 | f1da30e6 | Michael Hanselmann | # Verify version
|
264 | f1da30e6 | Michael Hanselmann | if version != constants.JOB_QUEUE_VERSION:
|
265 | f1da30e6 | Michael Hanselmann | raise errors.JobQueueError("Found version %s, expected %s", |
266 | f1da30e6 | Michael Hanselmann | version, constants.JOB_QUEUE_VERSION) |
267 | f1da30e6 | Michael Hanselmann | finally:
|
268 | f1da30e6 | Michael Hanselmann | version_fd.close() |
269 | f1da30e6 | Michael Hanselmann | |
270 | f1da30e6 | Michael Hanselmann | serial_fd = open(constants.JOB_QUEUE_SERIAL_FILE, "r") |
271 | f1da30e6 | Michael Hanselmann | try:
|
272 | f1da30e6 | Michael Hanselmann | # Read last serial
|
273 | f1da30e6 | Michael Hanselmann | self._last_serial = int(serial_fd.read(1024).strip()) |
274 | f1da30e6 | Michael Hanselmann | finally:
|
275 | f1da30e6 | Michael Hanselmann | serial_fd.close() |
276 | f1da30e6 | Michael Hanselmann | |
277 | f1da30e6 | Michael Hanselmann | def Close(self): |
278 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
279 | f1da30e6 | Michael Hanselmann | |
280 | f1da30e6 | Michael Hanselmann | self.lock_fd.close()
|
281 | f1da30e6 | Michael Hanselmann | self.lock_fd = None |
282 | f1da30e6 | Michael Hanselmann | |
283 | f1da30e6 | Michael Hanselmann | def _InitQueueUnlocked(self): |
284 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
285 | f1da30e6 | Michael Hanselmann | |
286 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_VERSION_FILE, |
287 | f1da30e6 | Michael Hanselmann | data="%s\n" % constants.JOB_QUEUE_VERSION)
|
288 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_SERIAL_FILE, |
289 | f1da30e6 | Michael Hanselmann | data="%s\n" % 0) |
290 | f1da30e6 | Michael Hanselmann | |
291 | f1da30e6 | Michael Hanselmann | def _NewSerialUnlocked(self): |
292 | f1da30e6 | Michael Hanselmann | """Generates a new job identifier.
|
293 | f1da30e6 | Michael Hanselmann |
|
294 | f1da30e6 | Michael Hanselmann | Job identifiers are unique during the lifetime of a cluster.
|
295 | f1da30e6 | Michael Hanselmann |
|
296 | f1da30e6 | Michael Hanselmann | Returns: A string representing the job identifier.
|
297 | f1da30e6 | Michael Hanselmann |
|
298 | f1da30e6 | Michael Hanselmann | """
|
299 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
300 | f1da30e6 | Michael Hanselmann | |
301 | f1da30e6 | Michael Hanselmann | # New number
|
302 | f1da30e6 | Michael Hanselmann | serial = self._last_serial + 1 |
303 | f1da30e6 | Michael Hanselmann | |
304 | f1da30e6 | Michael Hanselmann | # Write to file
|
305 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_SERIAL_FILE, |
306 | f1da30e6 | Michael Hanselmann | data="%s\n" % serial)
|
307 | f1da30e6 | Michael Hanselmann | |
308 | f1da30e6 | Michael Hanselmann | # Keep it only if we were able to write the file
|
309 | f1da30e6 | Michael Hanselmann | self._last_serial = serial
|
310 | f1da30e6 | Michael Hanselmann | |
311 | f1da30e6 | Michael Hanselmann | return serial
|
312 | f1da30e6 | Michael Hanselmann | |
313 | f1da30e6 | Michael Hanselmann | def _GetJobPath(self, job_id): |
314 | f1da30e6 | Michael Hanselmann | return os.path.join(constants.QUEUE_DIR, "job-%s" % job_id) |
315 | f1da30e6 | Michael Hanselmann | |
316 | 911a495b | Iustin Pop | def _GetJobIDsUnlocked(self, archived=False): |
317 | 911a495b | Iustin Pop | """Return all known job IDs.
|
318 | 911a495b | Iustin Pop |
|
319 | 911a495b | Iustin Pop | If the parameter archived is True, archived jobs IDs will be
|
320 | 911a495b | Iustin Pop | included. Currently this argument is unused.
|
321 | 911a495b | Iustin Pop |
|
322 | 911a495b | Iustin Pop | """
|
323 | 911a495b | Iustin Pop | jfiles = self._ListJobFiles()
|
324 | 911a495b | Iustin Pop | return [m.group(1) for m in |
325 | 911a495b | Iustin Pop | [self._RE_JOB_FILE.match(name) for name in jfiles]] |
326 | 911a495b | Iustin Pop | |
327 | f1da30e6 | Michael Hanselmann | def _ListJobFiles(self): |
328 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
329 | f1da30e6 | Michael Hanselmann | |
330 | f1da30e6 | Michael Hanselmann | return [name for name in utils.ListVisibleFiles(constants.QUEUE_DIR) |
331 | f1da30e6 | Michael Hanselmann | if self._RE_JOB_FILE.match(name)] |
332 | f1da30e6 | Michael Hanselmann | |
333 | 911a495b | Iustin Pop | def _LoadJobUnlocked(self, job_id): |
334 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
335 | f1da30e6 | Michael Hanselmann | |
336 | 911a495b | Iustin Pop | filepath = self._GetJobPath(job_id)
|
337 | f1da30e6 | Michael Hanselmann | logging.debug("Loading job from %s", filepath)
|
338 | f1da30e6 | Michael Hanselmann | try:
|
339 | f1da30e6 | Michael Hanselmann | fd = open(filepath, "r") |
340 | f1da30e6 | Michael Hanselmann | except IOError, err: |
341 | f1da30e6 | Michael Hanselmann | if err.errno in (errno.ENOENT, ): |
342 | f1da30e6 | Michael Hanselmann | return None |
343 | f1da30e6 | Michael Hanselmann | raise
|
344 | f1da30e6 | Michael Hanselmann | try:
|
345 | f1da30e6 | Michael Hanselmann | data = serializer.LoadJson(fd.read()) |
346 | f1da30e6 | Michael Hanselmann | finally:
|
347 | f1da30e6 | Michael Hanselmann | fd.close() |
348 | f1da30e6 | Michael Hanselmann | |
349 | f1da30e6 | Michael Hanselmann | return _QueuedJob.Restore(self, data) |
350 | f1da30e6 | Michael Hanselmann | |
351 | f1da30e6 | Michael Hanselmann | def _GetJobsUnlocked(self, job_ids): |
352 | 911a495b | Iustin Pop | if not job_ids: |
353 | 911a495b | Iustin Pop | job_ids = self._GetJobIDsUnlocked()
|
354 | f1da30e6 | Michael Hanselmann | |
355 | 911a495b | Iustin Pop | return [self._LoadJobUnlocked(job_id) for job_id in job_ids] |
356 | f1da30e6 | Michael Hanselmann | |
357 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
358 | f1da30e6 | Michael Hanselmann | def GetJobs(self, job_ids): |
359 | f1da30e6 | Michael Hanselmann | return self._GetJobsUnlocked(job_ids) |
360 | f1da30e6 | Michael Hanselmann | |
361 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
362 | f1da30e6 | Michael Hanselmann | def AddJob(self, ops): |
363 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
364 | f1da30e6 | Michael Hanselmann | |
365 | f1da30e6 | Michael Hanselmann | # Get job identifier
|
366 | f1da30e6 | Michael Hanselmann | job_id = self._NewSerialUnlocked()
|
367 | f1da30e6 | Michael Hanselmann | job = _QueuedJob(self, job_id, ops)
|
368 | f1da30e6 | Michael Hanselmann | |
369 | f1da30e6 | Michael Hanselmann | # Write to disk
|
370 | f1da30e6 | Michael Hanselmann | self._UpdateJobUnlocked(job)
|
371 | f1da30e6 | Michael Hanselmann | |
372 | f1da30e6 | Michael Hanselmann | return job
|
373 | f1da30e6 | Michael Hanselmann | |
374 | f1da30e6 | Michael Hanselmann | def _UpdateJobUnlocked(self, job): |
375 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
376 | f1da30e6 | Michael Hanselmann | |
377 | f1da30e6 | Michael Hanselmann | filename = self._GetJobPath(job.id)
|
378 | f1da30e6 | Michael Hanselmann | logging.debug("Writing job %s to %s", job.id, filename)
|
379 | f1da30e6 | Michael Hanselmann | utils.WriteFile(filename, |
380 | f1da30e6 | Michael Hanselmann | data=serializer.DumpJson(job.Serialize(), indent=False))
|
381 | f1da30e6 | Michael Hanselmann | |
382 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
383 | f1da30e6 | Michael Hanselmann | def UpdateJob(self, job): |
384 | f1da30e6 | Michael Hanselmann | return self._UpdateJobUnlocked(job) |
385 | f1da30e6 | Michael Hanselmann | |
386 | f1da30e6 | Michael Hanselmann | def ArchiveJob(self, job_id): |
387 | f1da30e6 | Michael Hanselmann | raise NotImplementedError() |
388 | f1da30e6 | Michael Hanselmann | |
389 | f1da30e6 | Michael Hanselmann | |
390 | e2715f69 | Michael Hanselmann | class JobQueue: |
391 | e2715f69 | Michael Hanselmann | """The job queue.
|
392 | e2715f69 | Michael Hanselmann |
|
393 | e2715f69 | Michael Hanselmann | """
|
394 | e2715f69 | Michael Hanselmann | def __init__(self, context): |
395 | e2715f69 | Michael Hanselmann | self._lock = threading.Lock()
|
396 | f1da30e6 | Michael Hanselmann | self._jobs = JobStorage()
|
397 | e2715f69 | Michael Hanselmann | self._wpool = _JobQueueWorkerPool(context)
|
398 | e2715f69 | Michael Hanselmann | |
399 | f1da30e6 | Michael Hanselmann | for job in self._jobs.GetJobs(None): |
400 | f1da30e6 | Michael Hanselmann | status = job.GetStatus() |
401 | f1da30e6 | Michael Hanselmann | if status in (constants.JOB_STATUS_QUEUED, ): |
402 | f1da30e6 | Michael Hanselmann | self._wpool.AddTask(job)
|
403 | e2715f69 | Michael Hanselmann | |
404 | f1da30e6 | Michael Hanselmann | elif status in (constants.JOB_STATUS_RUNNING, ): |
405 | f1da30e6 | Michael Hanselmann | logging.warning("Unfinished job %s found: %s", job.id, job)
|
406 | f1da30e6 | Michael Hanselmann | job.SetUnclean("Unclean master daemon shutdown")
|
407 | e2715f69 | Michael Hanselmann | |
408 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
409 | e2715f69 | Michael Hanselmann | def SubmitJob(self, ops): |
410 | e2715f69 | Michael Hanselmann | """Add a new job to the queue.
|
411 | e2715f69 | Michael Hanselmann |
|
412 | e2715f69 | Michael Hanselmann | This enters the job into our job queue and also puts it on the new
|
413 | e2715f69 | Michael Hanselmann | queue, in order for it to be picked up by the queue processors.
|
414 | e2715f69 | Michael Hanselmann |
|
415 | e2715f69 | Michael Hanselmann | Args:
|
416 | e2715f69 | Michael Hanselmann | - ops: Sequence of opcodes
|
417 | e2715f69 | Michael Hanselmann |
|
418 | e2715f69 | Michael Hanselmann | """
|
419 | f1da30e6 | Michael Hanselmann | job = self._jobs.AddJob(ops)
|
420 | e2715f69 | Michael Hanselmann | |
421 | e2715f69 | Michael Hanselmann | # Add to worker pool
|
422 | e2715f69 | Michael Hanselmann | self._wpool.AddTask(job)
|
423 | e2715f69 | Michael Hanselmann | |
424 | f1da30e6 | Michael Hanselmann | return job.id
|
425 | e2715f69 | Michael Hanselmann | |
426 | e2715f69 | Michael Hanselmann | def ArchiveJob(self, job_id): |
427 | e2715f69 | Michael Hanselmann | raise NotImplementedError() |
428 | e2715f69 | Michael Hanselmann | |
429 | e2715f69 | Michael Hanselmann | def CancelJob(self, job_id): |
430 | e2715f69 | Michael Hanselmann | raise NotImplementedError() |
431 | e2715f69 | Michael Hanselmann | |
432 | e2715f69 | Michael Hanselmann | def _GetJobInfo(self, job, fields): |
433 | e2715f69 | Michael Hanselmann | row = [] |
434 | e2715f69 | Michael Hanselmann | for fname in fields: |
435 | e2715f69 | Michael Hanselmann | if fname == "id": |
436 | e2715f69 | Michael Hanselmann | row.append(job.id) |
437 | e2715f69 | Michael Hanselmann | elif fname == "status": |
438 | e2715f69 | Michael Hanselmann | row.append(job.GetStatus()) |
439 | af30b2fd | Michael Hanselmann | elif fname == "ops": |
440 | af30b2fd | Michael Hanselmann | row.append([op.GetInput().__getstate__() for op in job._ops]) |
441 | af30b2fd | Michael Hanselmann | elif fname == "opresult": |
442 | 307149a8 | Iustin Pop | row.append([op.GetResult() for op in job._ops]) |
443 | af30b2fd | Michael Hanselmann | elif fname == "opstatus": |
444 | af30b2fd | Michael Hanselmann | row.append([op.GetStatus() for op in job._ops]) |
445 | e2715f69 | Michael Hanselmann | else:
|
446 | e2715f69 | Michael Hanselmann | raise errors.OpExecError("Invalid job query field '%s'" % fname) |
447 | e2715f69 | Michael Hanselmann | return row
|
448 | e2715f69 | Michael Hanselmann | |
449 | e2715f69 | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
450 | e2715f69 | Michael Hanselmann | """Returns a list of jobs in queue.
|
451 | e2715f69 | Michael Hanselmann |
|
452 | e2715f69 | Michael Hanselmann | Args:
|
453 | e2715f69 | Michael Hanselmann | - job_ids: Sequence of job identifiers or None for all
|
454 | e2715f69 | Michael Hanselmann | - fields: Names of fields to return
|
455 | e2715f69 | Michael Hanselmann |
|
456 | e2715f69 | Michael Hanselmann | """
|
457 | e2715f69 | Michael Hanselmann | self._lock.acquire()
|
458 | e2715f69 | Michael Hanselmann | try:
|
459 | e2715f69 | Michael Hanselmann | jobs = [] |
460 | e2715f69 | Michael Hanselmann | |
461 | f1da30e6 | Michael Hanselmann | for job in self._jobs.GetJobs(job_ids): |
462 | e2715f69 | Michael Hanselmann | if job is None: |
463 | e2715f69 | Michael Hanselmann | jobs.append(None)
|
464 | e2715f69 | Michael Hanselmann | else:
|
465 | e2715f69 | Michael Hanselmann | jobs.append(self._GetJobInfo(job, fields))
|
466 | e2715f69 | Michael Hanselmann | |
467 | e2715f69 | Michael Hanselmann | return jobs
|
468 | e2715f69 | Michael Hanselmann | finally:
|
469 | e2715f69 | Michael Hanselmann | self._lock.release()
|
470 | e2715f69 | Michael Hanselmann | |
471 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
472 | e2715f69 | Michael Hanselmann | def Shutdown(self): |
473 | e2715f69 | Michael Hanselmann | """Stops the job queue.
|
474 | e2715f69 | Michael Hanselmann |
|
475 | e2715f69 | Michael Hanselmann | """
|
476 | e2715f69 | Michael Hanselmann | self._wpool.TerminateWorkers()
|
477 | f1da30e6 | Michael Hanselmann | self._jobs.Close() |