root / lib / jqueue.py @ cb4e8387
History | View | Annotate | Download (33.5 kB)
1 | 498ae1cc | Iustin Pop | #
|
---|---|---|---|
2 | 498ae1cc | Iustin Pop | #
|
3 | 498ae1cc | Iustin Pop | |
4 | 5685c1a5 | Michael Hanselmann | # Copyright (C) 2006, 2007, 2008 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 | 6c5a7090 | Michael Hanselmann | """Module implementing the job queue handling.
|
23 | 6c5a7090 | Michael Hanselmann |
|
24 | ea03467c | Iustin Pop | Locking: there's a single, large lock in the L{JobQueue} class. It's
|
25 | ea03467c | Iustin Pop | used by all other classes in this module.
|
26 | ea03467c | Iustin Pop |
|
27 | ea03467c | Iustin Pop | @var JOBQUEUE_THREADS: the number of worker threads we start for
|
28 | ea03467c | Iustin Pop | processing jobs
|
29 | 6c5a7090 | Michael Hanselmann |
|
30 | 6c5a7090 | Michael Hanselmann | """
|
31 | 498ae1cc | Iustin Pop | |
32 | f1da30e6 | Michael Hanselmann | import os |
33 | e2715f69 | Michael Hanselmann | import logging |
34 | e2715f69 | Michael Hanselmann | import threading |
35 | f1da30e6 | Michael Hanselmann | import errno |
36 | f1da30e6 | Michael Hanselmann | import re |
37 | f1048938 | Iustin Pop | import time |
38 | 5685c1a5 | Michael Hanselmann | import weakref |
39 | 498ae1cc | Iustin Pop | |
40 | e2715f69 | Michael Hanselmann | from ganeti import constants |
41 | f1da30e6 | Michael Hanselmann | from ganeti import serializer |
42 | e2715f69 | Michael Hanselmann | from ganeti import workerpool |
43 | f1da30e6 | Michael Hanselmann | from ganeti import opcodes |
44 | 7a1ecaed | Iustin Pop | from ganeti import errors |
45 | e2715f69 | Michael Hanselmann | from ganeti import mcpu |
46 | 7996a135 | Iustin Pop | from ganeti import utils |
47 | 04ab05ce | Michael Hanselmann | from ganeti import jstore |
48 | c3f0a12f | Iustin Pop | from ganeti import rpc |
49 | e2715f69 | Michael Hanselmann | |
50 | 72737a7f | Iustin Pop | from ganeti.rpc import RpcRunner |
51 | e2715f69 | Michael Hanselmann | |
52 | 1daae384 | Iustin Pop | JOBQUEUE_THREADS = 25
|
53 | e2715f69 | Michael Hanselmann | |
54 | 498ae1cc | Iustin Pop | |
55 | 70552c46 | Michael Hanselmann | def TimeStampNow(): |
56 | ea03467c | Iustin Pop | """Returns the current timestamp.
|
57 | ea03467c | Iustin Pop |
|
58 | ea03467c | Iustin Pop | @rtype: tuple
|
59 | ea03467c | Iustin Pop | @return: the current time in the (seconds, microseconds) format
|
60 | ea03467c | Iustin Pop |
|
61 | ea03467c | Iustin Pop | """
|
62 | 70552c46 | Michael Hanselmann | return utils.SplitTime(time.time())
|
63 | 70552c46 | Michael Hanselmann | |
64 | 70552c46 | Michael Hanselmann | |
65 | e2715f69 | Michael Hanselmann | class _QueuedOpCode(object): |
66 | e2715f69 | Michael Hanselmann | """Encasulates an opcode object.
|
67 | e2715f69 | Michael Hanselmann |
|
68 | ea03467c | Iustin Pop | @ivar log: holds the execution log and consists of tuples
|
69 | ea03467c | Iustin Pop | of the form C{(log_serial, timestamp, level, message)}
|
70 | ea03467c | Iustin Pop | @ivar input: the OpCode we encapsulate
|
71 | ea03467c | Iustin Pop | @ivar status: the current status
|
72 | ea03467c | Iustin Pop | @ivar result: the result of the LU execution
|
73 | ea03467c | Iustin Pop | @ivar start_timestamp: timestamp for the start of the execution
|
74 | ea03467c | Iustin Pop | @ivar stop_timestamp: timestamp for the end of the execution
|
75 | f1048938 | Iustin Pop |
|
76 | e2715f69 | Michael Hanselmann | """
|
77 | 85f03e0d | Michael Hanselmann | def __init__(self, op): |
78 | ea03467c | Iustin Pop | """Constructor for the _QuededOpCode.
|
79 | ea03467c | Iustin Pop |
|
80 | ea03467c | Iustin Pop | @type op: L{opcodes.OpCode}
|
81 | ea03467c | Iustin Pop | @param op: the opcode we encapsulate
|
82 | ea03467c | Iustin Pop |
|
83 | ea03467c | Iustin Pop | """
|
84 | 85f03e0d | Michael Hanselmann | self.input = op
|
85 | 85f03e0d | Michael Hanselmann | self.status = constants.OP_STATUS_QUEUED
|
86 | 85f03e0d | Michael Hanselmann | self.result = None |
87 | 85f03e0d | Michael Hanselmann | self.log = []
|
88 | 70552c46 | Michael Hanselmann | self.start_timestamp = None |
89 | 70552c46 | Michael Hanselmann | self.end_timestamp = None |
90 | f1da30e6 | Michael Hanselmann | |
91 | f1da30e6 | Michael Hanselmann | @classmethod
|
92 | f1da30e6 | Michael Hanselmann | def Restore(cls, state): |
93 | ea03467c | Iustin Pop | """Restore the _QueuedOpCode from the serialized form.
|
94 | ea03467c | Iustin Pop |
|
95 | ea03467c | Iustin Pop | @type state: dict
|
96 | ea03467c | Iustin Pop | @param state: the serialized state
|
97 | ea03467c | Iustin Pop | @rtype: _QueuedOpCode
|
98 | ea03467c | Iustin Pop | @return: a new _QueuedOpCode instance
|
99 | ea03467c | Iustin Pop |
|
100 | ea03467c | Iustin Pop | """
|
101 | 85f03e0d | Michael Hanselmann | obj = _QueuedOpCode.__new__(cls) |
102 | 85f03e0d | Michael Hanselmann | obj.input = opcodes.OpCode.LoadOpCode(state["input"])
|
103 | 85f03e0d | Michael Hanselmann | obj.status = state["status"]
|
104 | 85f03e0d | Michael Hanselmann | obj.result = state["result"]
|
105 | 85f03e0d | Michael Hanselmann | obj.log = state["log"]
|
106 | 70552c46 | Michael Hanselmann | obj.start_timestamp = state.get("start_timestamp", None) |
107 | 70552c46 | Michael Hanselmann | obj.end_timestamp = state.get("end_timestamp", None) |
108 | f1da30e6 | Michael Hanselmann | return obj
|
109 | f1da30e6 | Michael Hanselmann | |
110 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
111 | ea03467c | Iustin Pop | """Serializes this _QueuedOpCode.
|
112 | ea03467c | Iustin Pop |
|
113 | ea03467c | Iustin Pop | @rtype: dict
|
114 | ea03467c | Iustin Pop | @return: the dictionary holding the serialized state
|
115 | ea03467c | Iustin Pop |
|
116 | ea03467c | Iustin Pop | """
|
117 | 6c5a7090 | Michael Hanselmann | return {
|
118 | 6c5a7090 | Michael Hanselmann | "input": self.input.__getstate__(), |
119 | 6c5a7090 | Michael Hanselmann | "status": self.status, |
120 | 6c5a7090 | Michael Hanselmann | "result": self.result, |
121 | 6c5a7090 | Michael Hanselmann | "log": self.log, |
122 | 70552c46 | Michael Hanselmann | "start_timestamp": self.start_timestamp, |
123 | 70552c46 | Michael Hanselmann | "end_timestamp": self.end_timestamp, |
124 | 6c5a7090 | Michael Hanselmann | } |
125 | f1048938 | Iustin Pop | |
126 | e2715f69 | Michael Hanselmann | |
127 | e2715f69 | Michael Hanselmann | class _QueuedJob(object): |
128 | e2715f69 | Michael Hanselmann | """In-memory job representation.
|
129 | e2715f69 | Michael Hanselmann |
|
130 | ea03467c | Iustin Pop | This is what we use to track the user-submitted jobs. Locking must
|
131 | ea03467c | Iustin Pop | be taken care of by users of this class.
|
132 | ea03467c | Iustin Pop |
|
133 | ea03467c | Iustin Pop | @type queue: L{JobQueue}
|
134 | ea03467c | Iustin Pop | @ivar queue: the parent queue
|
135 | ea03467c | Iustin Pop | @ivar id: the job ID
|
136 | ea03467c | Iustin Pop | @type ops: list
|
137 | ea03467c | Iustin Pop | @ivar ops: the list of _QueuedOpCode that constitute the job
|
138 | ea03467c | Iustin Pop | @type run_op_index: int
|
139 | ea03467c | Iustin Pop | @ivar run_op_index: the currently executing opcode, or -1 if
|
140 | ea03467c | Iustin Pop | we didn't yet start executing
|
141 | ea03467c | Iustin Pop | @type log_serial: int
|
142 | ea03467c | Iustin Pop | @ivar log_serial: holds the index for the next log entry
|
143 | ea03467c | Iustin Pop | @ivar received_timestamp: the timestamp for when the job was received
|
144 | ea03467c | Iustin Pop | @ivar start_timestmap: the timestamp for start of execution
|
145 | ea03467c | Iustin Pop | @ivar end_timestamp: the timestamp for end of execution
|
146 | ea03467c | Iustin Pop | @ivar change: a Condition variable we use for waiting for job changes
|
147 | e2715f69 | Michael Hanselmann |
|
148 | e2715f69 | Michael Hanselmann | """
|
149 | 85f03e0d | Michael Hanselmann | def __init__(self, queue, job_id, ops): |
150 | ea03467c | Iustin Pop | """Constructor for the _QueuedJob.
|
151 | ea03467c | Iustin Pop |
|
152 | ea03467c | Iustin Pop | @type queue: L{JobQueue}
|
153 | ea03467c | Iustin Pop | @param queue: our parent queue
|
154 | ea03467c | Iustin Pop | @type job_id: job_id
|
155 | ea03467c | Iustin Pop | @param job_id: our job id
|
156 | ea03467c | Iustin Pop | @type ops: list
|
157 | ea03467c | Iustin Pop | @param ops: the list of opcodes we hold, which will be encapsulated
|
158 | ea03467c | Iustin Pop | in _QueuedOpCodes
|
159 | ea03467c | Iustin Pop |
|
160 | ea03467c | Iustin Pop | """
|
161 | e2715f69 | Michael Hanselmann | if not ops: |
162 | ea03467c | Iustin Pop | # TODO: use a better exception
|
163 | e2715f69 | Michael Hanselmann | raise Exception("No opcodes") |
164 | e2715f69 | Michael Hanselmann | |
165 | 85f03e0d | Michael Hanselmann | self.queue = queue
|
166 | f1da30e6 | Michael Hanselmann | self.id = job_id
|
167 | 85f03e0d | Michael Hanselmann | self.ops = [_QueuedOpCode(op) for op in ops] |
168 | 85f03e0d | Michael Hanselmann | self.run_op_index = -1 |
169 | 6c5a7090 | Michael Hanselmann | self.log_serial = 0 |
170 | c56ec146 | Iustin Pop | self.received_timestamp = TimeStampNow()
|
171 | c56ec146 | Iustin Pop | self.start_timestamp = None |
172 | c56ec146 | Iustin Pop | self.end_timestamp = None |
173 | 6c5a7090 | Michael Hanselmann | |
174 | 6c5a7090 | Michael Hanselmann | # Condition to wait for changes
|
175 | 6c5a7090 | Michael Hanselmann | self.change = threading.Condition(self.queue._lock) |
176 | f1da30e6 | Michael Hanselmann | |
177 | f1da30e6 | Michael Hanselmann | @classmethod
|
178 | 85f03e0d | Michael Hanselmann | def Restore(cls, queue, state): |
179 | ea03467c | Iustin Pop | """Restore a _QueuedJob from serialized state:
|
180 | ea03467c | Iustin Pop |
|
181 | ea03467c | Iustin Pop | @type queue: L{JobQueue}
|
182 | ea03467c | Iustin Pop | @param queue: to which queue the restored job belongs
|
183 | ea03467c | Iustin Pop | @type state: dict
|
184 | ea03467c | Iustin Pop | @param state: the serialized state
|
185 | ea03467c | Iustin Pop | @rtype: _JobQueue
|
186 | ea03467c | Iustin Pop | @return: the restored _JobQueue instance
|
187 | ea03467c | Iustin Pop |
|
188 | ea03467c | Iustin Pop | """
|
189 | 85f03e0d | Michael Hanselmann | obj = _QueuedJob.__new__(cls) |
190 | 85f03e0d | Michael Hanselmann | obj.queue = queue |
191 | 85f03e0d | Michael Hanselmann | obj.id = state["id"]
|
192 | 85f03e0d | Michael Hanselmann | obj.run_op_index = state["run_op_index"]
|
193 | c56ec146 | Iustin Pop | obj.received_timestamp = state.get("received_timestamp", None) |
194 | c56ec146 | Iustin Pop | obj.start_timestamp = state.get("start_timestamp", None) |
195 | c56ec146 | Iustin Pop | obj.end_timestamp = state.get("end_timestamp", None) |
196 | 6c5a7090 | Michael Hanselmann | |
197 | 6c5a7090 | Michael Hanselmann | obj.ops = [] |
198 | 6c5a7090 | Michael Hanselmann | obj.log_serial = 0
|
199 | 6c5a7090 | Michael Hanselmann | for op_state in state["ops"]: |
200 | 6c5a7090 | Michael Hanselmann | op = _QueuedOpCode.Restore(op_state) |
201 | 6c5a7090 | Michael Hanselmann | for log_entry in op.log: |
202 | 6c5a7090 | Michael Hanselmann | obj.log_serial = max(obj.log_serial, log_entry[0]) |
203 | 6c5a7090 | Michael Hanselmann | obj.ops.append(op) |
204 | 6c5a7090 | Michael Hanselmann | |
205 | 6c5a7090 | Michael Hanselmann | # Condition to wait for changes
|
206 | 6c5a7090 | Michael Hanselmann | obj.change = threading.Condition(obj.queue._lock) |
207 | 6c5a7090 | Michael Hanselmann | |
208 | f1da30e6 | Michael Hanselmann | return obj
|
209 | f1da30e6 | Michael Hanselmann | |
210 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
211 | ea03467c | Iustin Pop | """Serialize the _JobQueue instance.
|
212 | ea03467c | Iustin Pop |
|
213 | ea03467c | Iustin Pop | @rtype: dict
|
214 | ea03467c | Iustin Pop | @return: the serialized state
|
215 | ea03467c | Iustin Pop |
|
216 | ea03467c | Iustin Pop | """
|
217 | f1da30e6 | Michael Hanselmann | return {
|
218 | f1da30e6 | Michael Hanselmann | "id": self.id, |
219 | 85f03e0d | Michael Hanselmann | "ops": [op.Serialize() for op in self.ops], |
220 | f1048938 | Iustin Pop | "run_op_index": self.run_op_index, |
221 | c56ec146 | Iustin Pop | "start_timestamp": self.start_timestamp, |
222 | c56ec146 | Iustin Pop | "end_timestamp": self.end_timestamp, |
223 | c56ec146 | Iustin Pop | "received_timestamp": self.received_timestamp, |
224 | f1da30e6 | Michael Hanselmann | } |
225 | f1da30e6 | Michael Hanselmann | |
226 | 85f03e0d | Michael Hanselmann | def CalcStatus(self): |
227 | ea03467c | Iustin Pop | """Compute the status of this job.
|
228 | ea03467c | Iustin Pop |
|
229 | ea03467c | Iustin Pop | This function iterates over all the _QueuedOpCodes in the job and
|
230 | ea03467c | Iustin Pop | based on their status, computes the job status.
|
231 | ea03467c | Iustin Pop |
|
232 | ea03467c | Iustin Pop | The algorithm is:
|
233 | ea03467c | Iustin Pop | - if we find a cancelled, or finished with error, the job
|
234 | ea03467c | Iustin Pop | status will be the same
|
235 | ea03467c | Iustin Pop | - otherwise, the last opcode with the status one of:
|
236 | ea03467c | Iustin Pop | - waitlock
|
237 | ea03467c | Iustin Pop | - running
|
238 | ea03467c | Iustin Pop |
|
239 | ea03467c | Iustin Pop | will determine the job status
|
240 | ea03467c | Iustin Pop |
|
241 | ea03467c | Iustin Pop | - otherwise, it means either all opcodes are queued, or success,
|
242 | ea03467c | Iustin Pop | and the job status will be the same
|
243 | ea03467c | Iustin Pop |
|
244 | ea03467c | Iustin Pop | @return: the job status
|
245 | ea03467c | Iustin Pop |
|
246 | ea03467c | Iustin Pop | """
|
247 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_QUEUED |
248 | e2715f69 | Michael Hanselmann | |
249 | e2715f69 | Michael Hanselmann | all_success = True
|
250 | 85f03e0d | Michael Hanselmann | for op in self.ops: |
251 | 85f03e0d | Michael Hanselmann | if op.status == constants.OP_STATUS_SUCCESS:
|
252 | e2715f69 | Michael Hanselmann | continue
|
253 | e2715f69 | Michael Hanselmann | |
254 | e2715f69 | Michael Hanselmann | all_success = False
|
255 | e2715f69 | Michael Hanselmann | |
256 | 85f03e0d | Michael Hanselmann | if op.status == constants.OP_STATUS_QUEUED:
|
257 | e2715f69 | Michael Hanselmann | pass
|
258 | e92376d7 | Iustin Pop | elif op.status == constants.OP_STATUS_WAITLOCK:
|
259 | e92376d7 | Iustin Pop | status = constants.JOB_STATUS_WAITLOCK |
260 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_RUNNING:
|
261 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_RUNNING |
262 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_ERROR:
|
263 | f1da30e6 | Michael Hanselmann | status = constants.JOB_STATUS_ERROR |
264 | f1da30e6 | Michael Hanselmann | # The whole job fails if one opcode failed
|
265 | f1da30e6 | Michael Hanselmann | break
|
266 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_CANCELED:
|
267 | 4cb1d919 | Michael Hanselmann | status = constants.OP_STATUS_CANCELED |
268 | 4cb1d919 | Michael Hanselmann | break
|
269 | e2715f69 | Michael Hanselmann | |
270 | e2715f69 | Michael Hanselmann | if all_success:
|
271 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_SUCCESS |
272 | e2715f69 | Michael Hanselmann | |
273 | e2715f69 | Michael Hanselmann | return status
|
274 | e2715f69 | Michael Hanselmann | |
275 | 6c5a7090 | Michael Hanselmann | def GetLogEntries(self, newer_than): |
276 | ea03467c | Iustin Pop | """Selectively returns the log entries.
|
277 | ea03467c | Iustin Pop |
|
278 | ea03467c | Iustin Pop | @type newer_than: None or int
|
279 | ea03467c | Iustin Pop | @param newer_than: if this is None, return all log enties,
|
280 | ea03467c | Iustin Pop | otherwise return only the log entries with serial higher
|
281 | ea03467c | Iustin Pop | than this value
|
282 | ea03467c | Iustin Pop | @rtype: list
|
283 | ea03467c | Iustin Pop | @return: the list of the log entries selected
|
284 | ea03467c | Iustin Pop |
|
285 | ea03467c | Iustin Pop | """
|
286 | 6c5a7090 | Michael Hanselmann | if newer_than is None: |
287 | 6c5a7090 | Michael Hanselmann | serial = -1
|
288 | 6c5a7090 | Michael Hanselmann | else:
|
289 | 6c5a7090 | Michael Hanselmann | serial = newer_than |
290 | 6c5a7090 | Michael Hanselmann | |
291 | 6c5a7090 | Michael Hanselmann | entries = [] |
292 | 6c5a7090 | Michael Hanselmann | for op in self.ops: |
293 | 63712a09 | Iustin Pop | entries.extend(filter(lambda entry: entry[0] > serial, op.log)) |
294 | 6c5a7090 | Michael Hanselmann | |
295 | 6c5a7090 | Michael Hanselmann | return entries
|
296 | 6c5a7090 | Michael Hanselmann | |
297 | f1048938 | Iustin Pop | |
298 | 85f03e0d | Michael Hanselmann | class _JobQueueWorker(workerpool.BaseWorker): |
299 | ea03467c | Iustin Pop | """The actual job workers.
|
300 | ea03467c | Iustin Pop |
|
301 | ea03467c | Iustin Pop | """
|
302 | e92376d7 | Iustin Pop | def _NotifyStart(self): |
303 | e92376d7 | Iustin Pop | """Mark the opcode as running, not lock-waiting.
|
304 | e92376d7 | Iustin Pop |
|
305 | e92376d7 | Iustin Pop | This is called from the mcpu code as a notifier function, when the
|
306 | e92376d7 | Iustin Pop | LU is finally about to start the Exec() method. Of course, to have
|
307 | e92376d7 | Iustin Pop | end-user visible results, the opcode must be initially (before
|
308 | e92376d7 | Iustin Pop | calling into Processor.ExecOpCode) set to OP_STATUS_WAITLOCK.
|
309 | e92376d7 | Iustin Pop |
|
310 | e92376d7 | Iustin Pop | """
|
311 | e92376d7 | Iustin Pop | assert self.queue, "Queue attribute is missing" |
312 | e92376d7 | Iustin Pop | assert self.opcode, "Opcode attribute is missing" |
313 | e92376d7 | Iustin Pop | |
314 | e92376d7 | Iustin Pop | self.queue.acquire()
|
315 | e92376d7 | Iustin Pop | try:
|
316 | e92376d7 | Iustin Pop | self.opcode.status = constants.OP_STATUS_RUNNING
|
317 | e92376d7 | Iustin Pop | finally:
|
318 | e92376d7 | Iustin Pop | self.queue.release()
|
319 | e92376d7 | Iustin Pop | |
320 | 85f03e0d | Michael Hanselmann | def RunTask(self, job): |
321 | e2715f69 | Michael Hanselmann | """Job executor.
|
322 | e2715f69 | Michael Hanselmann |
|
323 | 6c5a7090 | Michael Hanselmann | This functions processes a job. It is closely tied to the _QueuedJob and
|
324 | 6c5a7090 | Michael Hanselmann | _QueuedOpCode classes.
|
325 | e2715f69 | Michael Hanselmann |
|
326 | ea03467c | Iustin Pop | @type job: L{_QueuedJob}
|
327 | ea03467c | Iustin Pop | @param job: the job to be processed
|
328 | ea03467c | Iustin Pop |
|
329 | e2715f69 | Michael Hanselmann | """
|
330 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s processing job %s",
|
331 | e2715f69 | Michael Hanselmann | self.worker_id, job.id)
|
332 | 5bdce580 | Michael Hanselmann | proc = mcpu.Processor(self.pool.queue.context)
|
333 | e92376d7 | Iustin Pop | self.queue = queue = job.queue
|
334 | e2715f69 | Michael Hanselmann | try:
|
335 | 85f03e0d | Michael Hanselmann | try:
|
336 | 85f03e0d | Michael Hanselmann | count = len(job.ops)
|
337 | 85f03e0d | Michael Hanselmann | for idx, op in enumerate(job.ops): |
338 | 85f03e0d | Michael Hanselmann | try:
|
339 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Starting %s", idx + 1, count, op) |
340 | 85f03e0d | Michael Hanselmann | |
341 | 85f03e0d | Michael Hanselmann | queue.acquire() |
342 | 85f03e0d | Michael Hanselmann | try:
|
343 | 85f03e0d | Michael Hanselmann | job.run_op_index = idx |
344 | e92376d7 | Iustin Pop | op.status = constants.OP_STATUS_WAITLOCK |
345 | 85f03e0d | Michael Hanselmann | op.result = None
|
346 | 70552c46 | Michael Hanselmann | op.start_timestamp = TimeStampNow() |
347 | c56ec146 | Iustin Pop | if idx == 0: # first opcode |
348 | c56ec146 | Iustin Pop | job.start_timestamp = op.start_timestamp |
349 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
350 | 85f03e0d | Michael Hanselmann | |
351 | 38206f3c | Iustin Pop | input_opcode = op.input |
352 | 85f03e0d | Michael Hanselmann | finally:
|
353 | 85f03e0d | Michael Hanselmann | queue.release() |
354 | 85f03e0d | Michael Hanselmann | |
355 | dfe57c22 | Michael Hanselmann | def _Log(*args): |
356 | 6c5a7090 | Michael Hanselmann | """Append a log entry.
|
357 | 6c5a7090 | Michael Hanselmann |
|
358 | 6c5a7090 | Michael Hanselmann | """
|
359 | 6c5a7090 | Michael Hanselmann | assert len(args) < 3 |
360 | 6c5a7090 | Michael Hanselmann | |
361 | 6c5a7090 | Michael Hanselmann | if len(args) == 1: |
362 | 6c5a7090 | Michael Hanselmann | log_type = constants.ELOG_MESSAGE |
363 | 6c5a7090 | Michael Hanselmann | log_msg = args[0]
|
364 | 6c5a7090 | Michael Hanselmann | else:
|
365 | 6c5a7090 | Michael Hanselmann | log_type, log_msg = args |
366 | 6c5a7090 | Michael Hanselmann | |
367 | 6c5a7090 | Michael Hanselmann | # The time is split to make serialization easier and not lose
|
368 | 6c5a7090 | Michael Hanselmann | # precision.
|
369 | 6c5a7090 | Michael Hanselmann | timestamp = utils.SplitTime(time.time()) |
370 | dfe57c22 | Michael Hanselmann | |
371 | 6c5a7090 | Michael Hanselmann | queue.acquire() |
372 | dfe57c22 | Michael Hanselmann | try:
|
373 | 6c5a7090 | Michael Hanselmann | job.log_serial += 1
|
374 | 6c5a7090 | Michael Hanselmann | op.log.append((job.log_serial, timestamp, log_type, log_msg)) |
375 | 6c5a7090 | Michael Hanselmann | |
376 | dfe57c22 | Michael Hanselmann | job.change.notifyAll() |
377 | dfe57c22 | Michael Hanselmann | finally:
|
378 | 6c5a7090 | Michael Hanselmann | queue.release() |
379 | dfe57c22 | Michael Hanselmann | |
380 | 6c5a7090 | Michael Hanselmann | # Make sure not to hold lock while _Log is called
|
381 | e92376d7 | Iustin Pop | self.opcode = op
|
382 | e92376d7 | Iustin Pop | result = proc.ExecOpCode(input_opcode, _Log, self._NotifyStart)
|
383 | 85f03e0d | Michael Hanselmann | |
384 | 85f03e0d | Michael Hanselmann | queue.acquire() |
385 | 85f03e0d | Michael Hanselmann | try:
|
386 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_SUCCESS |
387 | 85f03e0d | Michael Hanselmann | op.result = result |
388 | 70552c46 | Michael Hanselmann | op.end_timestamp = TimeStampNow() |
389 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
390 | 85f03e0d | Michael Hanselmann | finally:
|
391 | 85f03e0d | Michael Hanselmann | queue.release() |
392 | 85f03e0d | Michael Hanselmann | |
393 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Successfully finished %s",
|
394 | 85f03e0d | Michael Hanselmann | idx + 1, count, op)
|
395 | 85f03e0d | Michael Hanselmann | except Exception, err: |
396 | 85f03e0d | Michael Hanselmann | queue.acquire() |
397 | 85f03e0d | Michael Hanselmann | try:
|
398 | 85f03e0d | Michael Hanselmann | try:
|
399 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
400 | 85f03e0d | Michael Hanselmann | op.result = str(err)
|
401 | 70552c46 | Michael Hanselmann | op.end_timestamp = TimeStampNow() |
402 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Error in %s", idx + 1, count, op) |
403 | 85f03e0d | Michael Hanselmann | finally:
|
404 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
405 | 85f03e0d | Michael Hanselmann | finally:
|
406 | 85f03e0d | Michael Hanselmann | queue.release() |
407 | 85f03e0d | Michael Hanselmann | raise
|
408 | 85f03e0d | Michael Hanselmann | |
409 | 85f03e0d | Michael Hanselmann | except errors.GenericError, err:
|
410 | 85f03e0d | Michael Hanselmann | logging.exception("Ganeti exception")
|
411 | 85f03e0d | Michael Hanselmann | except:
|
412 | 85f03e0d | Michael Hanselmann | logging.exception("Unhandled exception")
|
413 | e2715f69 | Michael Hanselmann | finally:
|
414 | 85f03e0d | Michael Hanselmann | queue.acquire() |
415 | 85f03e0d | Michael Hanselmann | try:
|
416 | 65548ed5 | Michael Hanselmann | try:
|
417 | 65548ed5 | Michael Hanselmann | job.run_op_idx = -1
|
418 | c56ec146 | Iustin Pop | job.end_timestamp = TimeStampNow() |
419 | 65548ed5 | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
420 | 65548ed5 | Michael Hanselmann | finally:
|
421 | 65548ed5 | Michael Hanselmann | job_id = job.id |
422 | 65548ed5 | Michael Hanselmann | status = job.CalcStatus() |
423 | 85f03e0d | Michael Hanselmann | finally:
|
424 | 85f03e0d | Michael Hanselmann | queue.release() |
425 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s finished job %s, status = %s",
|
426 | 85f03e0d | Michael Hanselmann | self.worker_id, job_id, status)
|
427 | e2715f69 | Michael Hanselmann | |
428 | e2715f69 | Michael Hanselmann | |
429 | e2715f69 | Michael Hanselmann | class _JobQueueWorkerPool(workerpool.WorkerPool): |
430 | ea03467c | Iustin Pop | """Simple class implementing a job-processing workerpool.
|
431 | ea03467c | Iustin Pop |
|
432 | ea03467c | Iustin Pop | """
|
433 | 5bdce580 | Michael Hanselmann | def __init__(self, queue): |
434 | e2715f69 | Michael Hanselmann | super(_JobQueueWorkerPool, self).__init__(JOBQUEUE_THREADS, |
435 | e2715f69 | Michael Hanselmann | _JobQueueWorker) |
436 | 5bdce580 | Michael Hanselmann | self.queue = queue
|
437 | e2715f69 | Michael Hanselmann | |
438 | e2715f69 | Michael Hanselmann | |
439 | 85f03e0d | Michael Hanselmann | class JobQueue(object): |
440 | ea03467c | Iustin Pop | """Quue used to manaage the jobs.
|
441 | ea03467c | Iustin Pop |
|
442 | ea03467c | Iustin Pop | @cvar _RE_JOB_FILE: regex matching the valid job file names
|
443 | ea03467c | Iustin Pop |
|
444 | ea03467c | Iustin Pop | """
|
445 | bac5ffc3 | Oleksiy Mishchenko | _RE_JOB_FILE = re.compile(r"^job-(%s)$" % constants.JOB_ID_TEMPLATE)
|
446 | f1da30e6 | Michael Hanselmann | |
447 | db37da70 | Michael Hanselmann | def _RequireOpenQueue(fn): |
448 | db37da70 | Michael Hanselmann | """Decorator for "public" functions.
|
449 | db37da70 | Michael Hanselmann |
|
450 | ea03467c | Iustin Pop | This function should be used for all 'public' functions. That is,
|
451 | ea03467c | Iustin Pop | functions usually called from other classes.
|
452 | db37da70 | Michael Hanselmann |
|
453 | ea03467c | Iustin Pop | @warning: Use this decorator only after utils.LockedMethod!
|
454 | db37da70 | Michael Hanselmann |
|
455 | ea03467c | Iustin Pop | Example::
|
456 | db37da70 | Michael Hanselmann | @utils.LockedMethod
|
457 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
458 | db37da70 | Michael Hanselmann | def Example(self):
|
459 | db37da70 | Michael Hanselmann | pass
|
460 | db37da70 | Michael Hanselmann |
|
461 | db37da70 | Michael Hanselmann | """
|
462 | db37da70 | Michael Hanselmann | def wrapper(self, *args, **kwargs): |
463 | 04ab05ce | Michael Hanselmann | assert self._queue_lock is not None, "Queue should be open" |
464 | db37da70 | Michael Hanselmann | return fn(self, *args, **kwargs) |
465 | db37da70 | Michael Hanselmann | return wrapper
|
466 | db37da70 | Michael Hanselmann | |
467 | 85f03e0d | Michael Hanselmann | def __init__(self, context): |
468 | ea03467c | Iustin Pop | """Constructor for JobQueue.
|
469 | ea03467c | Iustin Pop |
|
470 | ea03467c | Iustin Pop | The constructor will initialize the job queue object and then
|
471 | ea03467c | Iustin Pop | start loading the current jobs from disk, either for starting them
|
472 | ea03467c | Iustin Pop | (if they were queue) or for aborting them (if they were already
|
473 | ea03467c | Iustin Pop | running).
|
474 | ea03467c | Iustin Pop |
|
475 | ea03467c | Iustin Pop | @type context: GanetiContext
|
476 | ea03467c | Iustin Pop | @param context: the context object for access to the configuration
|
477 | ea03467c | Iustin Pop | data and other ganeti objects
|
478 | ea03467c | Iustin Pop |
|
479 | ea03467c | Iustin Pop | """
|
480 | 5bdce580 | Michael Hanselmann | self.context = context
|
481 | 5685c1a5 | Michael Hanselmann | self._memcache = weakref.WeakValueDictionary()
|
482 | c3f0a12f | Iustin Pop | self._my_hostname = utils.HostInfo().name
|
483 | f1da30e6 | Michael Hanselmann | |
484 | 85f03e0d | Michael Hanselmann | # Locking
|
485 | 85f03e0d | Michael Hanselmann | self._lock = threading.Lock()
|
486 | 85f03e0d | Michael Hanselmann | self.acquire = self._lock.acquire |
487 | 85f03e0d | Michael Hanselmann | self.release = self._lock.release |
488 | 85f03e0d | Michael Hanselmann | |
489 | 04ab05ce | Michael Hanselmann | # Initialize
|
490 | 5d6fb8eb | Michael Hanselmann | self._queue_lock = jstore.InitAndVerifyQueue(must_lock=True) |
491 | f1da30e6 | Michael Hanselmann | |
492 | 04ab05ce | Michael Hanselmann | # Read serial file
|
493 | 04ab05ce | Michael Hanselmann | self._last_serial = jstore.ReadSerial()
|
494 | 04ab05ce | Michael Hanselmann | assert self._last_serial is not None, ("Serial file was modified between" |
495 | 04ab05ce | Michael Hanselmann | " check in jstore and here")
|
496 | c4beba1c | Iustin Pop | |
497 | 23752136 | Michael Hanselmann | # Get initial list of nodes
|
498 | 99aabbed | Iustin Pop | self._nodes = dict((n.name, n.primary_ip) |
499 | 99aabbed | Iustin Pop | for n in self.context.cfg.GetAllNodesInfo().values()) |
500 | 8e00939c | Michael Hanselmann | |
501 | 8e00939c | Michael Hanselmann | # Remove master node
|
502 | 8e00939c | Michael Hanselmann | try:
|
503 | 99aabbed | Iustin Pop | del self._nodes[self._my_hostname] |
504 | 8e00939c | Michael Hanselmann | except ValueError: |
505 | 8e00939c | Michael Hanselmann | pass
|
506 | 23752136 | Michael Hanselmann | |
507 | 23752136 | Michael Hanselmann | # TODO: Check consistency across nodes
|
508 | 23752136 | Michael Hanselmann | |
509 | 85f03e0d | Michael Hanselmann | # Setup worker pool
|
510 | 5bdce580 | Michael Hanselmann | self._wpool = _JobQueueWorkerPool(self) |
511 | 85f03e0d | Michael Hanselmann | |
512 | 85f03e0d | Michael Hanselmann | # We need to lock here because WorkerPool.AddTask() may start a job while
|
513 | 85f03e0d | Michael Hanselmann | # we're still doing our work.
|
514 | 85f03e0d | Michael Hanselmann | self.acquire()
|
515 | 85f03e0d | Michael Hanselmann | try:
|
516 | 85f03e0d | Michael Hanselmann | for job in self._GetJobsUnlocked(None): |
517 | 94ed59a5 | Iustin Pop | # a failure in loading the job can cause 'None' to be returned
|
518 | 94ed59a5 | Iustin Pop | if job is None: |
519 | 94ed59a5 | Iustin Pop | continue
|
520 | 94ed59a5 | Iustin Pop | |
521 | 85f03e0d | Michael Hanselmann | status = job.CalcStatus() |
522 | 85f03e0d | Michael Hanselmann | |
523 | 85f03e0d | Michael Hanselmann | if status in (constants.JOB_STATUS_QUEUED, ): |
524 | 85f03e0d | Michael Hanselmann | self._wpool.AddTask(job)
|
525 | 85f03e0d | Michael Hanselmann | |
526 | e92376d7 | Iustin Pop | elif status in (constants.JOB_STATUS_RUNNING, |
527 | e92376d7 | Iustin Pop | constants.JOB_STATUS_WAITLOCK): |
528 | 85f03e0d | Michael Hanselmann | logging.warning("Unfinished job %s found: %s", job.id, job)
|
529 | 85f03e0d | Michael Hanselmann | try:
|
530 | 85f03e0d | Michael Hanselmann | for op in job.ops: |
531 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
532 | 85f03e0d | Michael Hanselmann | op.result = "Unclean master daemon shutdown"
|
533 | 85f03e0d | Michael Hanselmann | finally:
|
534 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
535 | 85f03e0d | Michael Hanselmann | finally:
|
536 | 85f03e0d | Michael Hanselmann | self.release()
|
537 | 85f03e0d | Michael Hanselmann | |
538 | d2e03a33 | Michael Hanselmann | @utils.LockedMethod
|
539 | d2e03a33 | Michael Hanselmann | @_RequireOpenQueue
|
540 | 99aabbed | Iustin Pop | def AddNode(self, node): |
541 | 99aabbed | Iustin Pop | """Register a new node with the queue.
|
542 | 99aabbed | Iustin Pop |
|
543 | 99aabbed | Iustin Pop | @type node: L{objects.Node}
|
544 | 99aabbed | Iustin Pop | @param node: the node object to be added
|
545 | 99aabbed | Iustin Pop |
|
546 | 99aabbed | Iustin Pop | """
|
547 | 99aabbed | Iustin Pop | node_name = node.name |
548 | d2e03a33 | Michael Hanselmann | assert node_name != self._my_hostname |
549 | 23752136 | Michael Hanselmann | |
550 | 9f774ee8 | Michael Hanselmann | # Clean queue directory on added node
|
551 | 72737a7f | Iustin Pop | RpcRunner.call_jobqueue_purge(node_name) |
552 | 23752136 | Michael Hanselmann | |
553 | d2e03a33 | Michael Hanselmann | # Upload the whole queue excluding archived jobs
|
554 | d2e03a33 | Michael Hanselmann | files = [self._GetJobPath(job_id) for job_id in self._GetJobIDsUnlocked()] |
555 | 23752136 | Michael Hanselmann | |
556 | d2e03a33 | Michael Hanselmann | # Upload current serial file
|
557 | d2e03a33 | Michael Hanselmann | files.append(constants.JOB_QUEUE_SERIAL_FILE) |
558 | d2e03a33 | Michael Hanselmann | |
559 | d2e03a33 | Michael Hanselmann | for file_name in files: |
560 | 9f774ee8 | Michael Hanselmann | # Read file content
|
561 | 9f774ee8 | Michael Hanselmann | fd = open(file_name, "r") |
562 | 9f774ee8 | Michael Hanselmann | try:
|
563 | 9f774ee8 | Michael Hanselmann | content = fd.read() |
564 | 9f774ee8 | Michael Hanselmann | finally:
|
565 | 9f774ee8 | Michael Hanselmann | fd.close() |
566 | 9f774ee8 | Michael Hanselmann | |
567 | 99aabbed | Iustin Pop | result = RpcRunner.call_jobqueue_update([node_name], [node.primary_ip], |
568 | 99aabbed | Iustin Pop | file_name, content) |
569 | d2e03a33 | Michael Hanselmann | if not result[node_name]: |
570 | d2e03a33 | Michael Hanselmann | logging.error("Failed to upload %s to %s", file_name, node_name)
|
571 | d2e03a33 | Michael Hanselmann | |
572 | 99aabbed | Iustin Pop | self._nodes[node_name] = node.primary_ip
|
573 | d2e03a33 | Michael Hanselmann | |
574 | d2e03a33 | Michael Hanselmann | @utils.LockedMethod
|
575 | d2e03a33 | Michael Hanselmann | @_RequireOpenQueue
|
576 | d2e03a33 | Michael Hanselmann | def RemoveNode(self, node_name): |
577 | ea03467c | Iustin Pop | """Callback called when removing nodes from the cluster.
|
578 | ea03467c | Iustin Pop |
|
579 | ea03467c | Iustin Pop | @type node_name: str
|
580 | ea03467c | Iustin Pop | @param node_name: the name of the node to remove
|
581 | ea03467c | Iustin Pop |
|
582 | ea03467c | Iustin Pop | """
|
583 | 23752136 | Michael Hanselmann | try:
|
584 | d2e03a33 | Michael Hanselmann | # The queue is removed by the "leave node" RPC call.
|
585 | 99aabbed | Iustin Pop | del self._nodes[node_name] |
586 | d2e03a33 | Michael Hanselmann | except KeyError: |
587 | 23752136 | Michael Hanselmann | pass
|
588 | 23752136 | Michael Hanselmann | |
589 | e74798c1 | Michael Hanselmann | def _CheckRpcResult(self, result, nodes, failmsg): |
590 | ea03467c | Iustin Pop | """Verifies the status of an RPC call.
|
591 | ea03467c | Iustin Pop |
|
592 | ea03467c | Iustin Pop | Since we aim to keep consistency should this node (the current
|
593 | ea03467c | Iustin Pop | master) fail, we will log errors if our rpc fail, and especially
|
594 | ea03467c | Iustin Pop | log the case when more than half of the nodes failes.
|
595 | ea03467c | Iustin Pop |
|
596 | ea03467c | Iustin Pop | @param result: the data as returned from the rpc call
|
597 | ea03467c | Iustin Pop | @type nodes: list
|
598 | ea03467c | Iustin Pop | @param nodes: the list of nodes we made the call to
|
599 | ea03467c | Iustin Pop | @type failmsg: str
|
600 | ea03467c | Iustin Pop | @param failmsg: the identifier to be used for logging
|
601 | ea03467c | Iustin Pop |
|
602 | ea03467c | Iustin Pop | """
|
603 | e74798c1 | Michael Hanselmann | failed = [] |
604 | e74798c1 | Michael Hanselmann | success = [] |
605 | e74798c1 | Michael Hanselmann | |
606 | e74798c1 | Michael Hanselmann | for node in nodes: |
607 | e74798c1 | Michael Hanselmann | if result[node]:
|
608 | e74798c1 | Michael Hanselmann | success.append(node) |
609 | e74798c1 | Michael Hanselmann | else:
|
610 | e74798c1 | Michael Hanselmann | failed.append(node) |
611 | e74798c1 | Michael Hanselmann | |
612 | e74798c1 | Michael Hanselmann | if failed:
|
613 | e74798c1 | Michael Hanselmann | logging.error("%s failed on %s", failmsg, ", ".join(failed)) |
614 | e74798c1 | Michael Hanselmann | |
615 | e74798c1 | Michael Hanselmann | # +1 for the master node
|
616 | e74798c1 | Michael Hanselmann | if (len(success) + 1) < len(failed): |
617 | e74798c1 | Michael Hanselmann | # TODO: Handle failing nodes
|
618 | e74798c1 | Michael Hanselmann | logging.error("More than half of the nodes failed")
|
619 | e74798c1 | Michael Hanselmann | |
620 | 99aabbed | Iustin Pop | def _GetNodeIp(self): |
621 | 99aabbed | Iustin Pop | """Helper for returning the node name/ip list.
|
622 | 99aabbed | Iustin Pop |
|
623 | ea03467c | Iustin Pop | @rtype: (list, list)
|
624 | ea03467c | Iustin Pop | @return: a tuple of two lists, the first one with the node
|
625 | ea03467c | Iustin Pop | names and the second one with the node addresses
|
626 | ea03467c | Iustin Pop |
|
627 | 99aabbed | Iustin Pop | """
|
628 | 99aabbed | Iustin Pop | name_list = self._nodes.keys()
|
629 | 99aabbed | Iustin Pop | addr_list = [self._nodes[name] for name in name_list] |
630 | 99aabbed | Iustin Pop | return name_list, addr_list
|
631 | 99aabbed | Iustin Pop | |
632 | 8e00939c | Michael Hanselmann | def _WriteAndReplicateFileUnlocked(self, file_name, data): |
633 | 8e00939c | Michael Hanselmann | """Writes a file locally and then replicates it to all nodes.
|
634 | 8e00939c | Michael Hanselmann |
|
635 | ea03467c | Iustin Pop | This function will replace the contents of a file on the local
|
636 | ea03467c | Iustin Pop | node and then replicate it to all the other nodes we have.
|
637 | ea03467c | Iustin Pop |
|
638 | ea03467c | Iustin Pop | @type file_name: str
|
639 | ea03467c | Iustin Pop | @param file_name: the path of the file to be replicated
|
640 | ea03467c | Iustin Pop | @type data: str
|
641 | ea03467c | Iustin Pop | @param data: the new contents of the file
|
642 | ea03467c | Iustin Pop |
|
643 | 8e00939c | Michael Hanselmann | """
|
644 | 8e00939c | Michael Hanselmann | utils.WriteFile(file_name, data=data) |
645 | 8e00939c | Michael Hanselmann | |
646 | 99aabbed | Iustin Pop | names, addrs = self._GetNodeIp()
|
647 | 99aabbed | Iustin Pop | result = RpcRunner.call_jobqueue_update(names, addrs, file_name, data) |
648 | e74798c1 | Michael Hanselmann | self._CheckRpcResult(result, self._nodes, |
649 | e74798c1 | Michael Hanselmann | "Updating %s" % file_name)
|
650 | 23752136 | Michael Hanselmann | |
651 | abc1f2ce | Michael Hanselmann | def _RenameFileUnlocked(self, old, new): |
652 | ea03467c | Iustin Pop | """Renames a file locally and then replicate the change.
|
653 | ea03467c | Iustin Pop |
|
654 | ea03467c | Iustin Pop | This function will rename a file in the local queue directory
|
655 | ea03467c | Iustin Pop | and then replicate this rename to all the other nodes we have.
|
656 | ea03467c | Iustin Pop |
|
657 | ea03467c | Iustin Pop | @type old: str
|
658 | ea03467c | Iustin Pop | @param old: the current name of the file
|
659 | ea03467c | Iustin Pop | @type new: str
|
660 | ea03467c | Iustin Pop | @param new: the new name of the file
|
661 | ea03467c | Iustin Pop |
|
662 | ea03467c | Iustin Pop | """
|
663 | abc1f2ce | Michael Hanselmann | os.rename(old, new) |
664 | abc1f2ce | Michael Hanselmann | |
665 | 99aabbed | Iustin Pop | names, addrs = self._GetNodeIp()
|
666 | 99aabbed | Iustin Pop | result = RpcRunner.call_jobqueue_rename(names, addrs, old, new) |
667 | e74798c1 | Michael Hanselmann | self._CheckRpcResult(result, self._nodes, |
668 | e74798c1 | Michael Hanselmann | "Moving %s to %s" % (old, new))
|
669 | abc1f2ce | Michael Hanselmann | |
670 | 85f03e0d | Michael Hanselmann | def _FormatJobID(self, job_id): |
671 | ea03467c | Iustin Pop | """Convert a job ID to string format.
|
672 | ea03467c | Iustin Pop |
|
673 | ea03467c | Iustin Pop | Currently this just does C{str(job_id)} after performing some
|
674 | ea03467c | Iustin Pop | checks, but if we want to change the job id format this will
|
675 | ea03467c | Iustin Pop | abstract this change.
|
676 | ea03467c | Iustin Pop |
|
677 | ea03467c | Iustin Pop | @type job_id: int or long
|
678 | ea03467c | Iustin Pop | @param job_id: the numeric job id
|
679 | ea03467c | Iustin Pop | @rtype: str
|
680 | ea03467c | Iustin Pop | @return: the formatted job id
|
681 | ea03467c | Iustin Pop |
|
682 | ea03467c | Iustin Pop | """
|
683 | 85f03e0d | Michael Hanselmann | if not isinstance(job_id, (int, long)): |
684 | 85f03e0d | Michael Hanselmann | raise errors.ProgrammerError("Job ID '%s' not numeric" % job_id) |
685 | 85f03e0d | Michael Hanselmann | if job_id < 0: |
686 | 85f03e0d | Michael Hanselmann | raise errors.ProgrammerError("Job ID %s is negative" % job_id) |
687 | 85f03e0d | Michael Hanselmann | |
688 | 85f03e0d | Michael Hanselmann | return str(job_id) |
689 | 85f03e0d | Michael Hanselmann | |
690 | 4c848b18 | Michael Hanselmann | def _NewSerialUnlocked(self): |
691 | f1da30e6 | Michael Hanselmann | """Generates a new job identifier.
|
692 | f1da30e6 | Michael Hanselmann |
|
693 | f1da30e6 | Michael Hanselmann | Job identifiers are unique during the lifetime of a cluster.
|
694 | f1da30e6 | Michael Hanselmann |
|
695 | ea03467c | Iustin Pop | @rtype: str
|
696 | ea03467c | Iustin Pop | @return: a string representing the job identifier.
|
697 | f1da30e6 | Michael Hanselmann |
|
698 | f1da30e6 | Michael Hanselmann | """
|
699 | f1da30e6 | Michael Hanselmann | # New number
|
700 | f1da30e6 | Michael Hanselmann | serial = self._last_serial + 1 |
701 | f1da30e6 | Michael Hanselmann | |
702 | f1da30e6 | Michael Hanselmann | # Write to file
|
703 | 23752136 | Michael Hanselmann | self._WriteAndReplicateFileUnlocked(constants.JOB_QUEUE_SERIAL_FILE,
|
704 | 23752136 | Michael Hanselmann | "%s\n" % serial)
|
705 | f1da30e6 | Michael Hanselmann | |
706 | f1da30e6 | Michael Hanselmann | # Keep it only if we were able to write the file
|
707 | f1da30e6 | Michael Hanselmann | self._last_serial = serial
|
708 | f1da30e6 | Michael Hanselmann | |
709 | 85f03e0d | Michael Hanselmann | return self._FormatJobID(serial) |
710 | f1da30e6 | Michael Hanselmann | |
711 | 85f03e0d | Michael Hanselmann | @staticmethod
|
712 | 85f03e0d | Michael Hanselmann | def _GetJobPath(job_id): |
713 | ea03467c | Iustin Pop | """Returns the job file for a given job id.
|
714 | ea03467c | Iustin Pop |
|
715 | ea03467c | Iustin Pop | @type job_id: str
|
716 | ea03467c | Iustin Pop | @param job_id: the job identifier
|
717 | ea03467c | Iustin Pop | @rtype: str
|
718 | ea03467c | Iustin Pop | @return: the path to the job file
|
719 | ea03467c | Iustin Pop |
|
720 | ea03467c | Iustin Pop | """
|
721 | f1da30e6 | Michael Hanselmann | return os.path.join(constants.QUEUE_DIR, "job-%s" % job_id) |
722 | f1da30e6 | Michael Hanselmann | |
723 | 85f03e0d | Michael Hanselmann | @staticmethod
|
724 | 85f03e0d | Michael Hanselmann | def _GetArchivedJobPath(job_id): |
725 | ea03467c | Iustin Pop | """Returns the archived job file for a give job id.
|
726 | ea03467c | Iustin Pop |
|
727 | ea03467c | Iustin Pop | @type job_id: str
|
728 | ea03467c | Iustin Pop | @param job_id: the job identifier
|
729 | ea03467c | Iustin Pop | @rtype: str
|
730 | ea03467c | Iustin Pop | @return: the path to the archived job file
|
731 | ea03467c | Iustin Pop |
|
732 | ea03467c | Iustin Pop | """
|
733 | 0cb94105 | Michael Hanselmann | return os.path.join(constants.JOB_QUEUE_ARCHIVE_DIR, "job-%s" % job_id) |
734 | 0cb94105 | Michael Hanselmann | |
735 | 85f03e0d | Michael Hanselmann | @classmethod
|
736 | 85f03e0d | Michael Hanselmann | def _ExtractJobID(cls, name): |
737 | ea03467c | Iustin Pop | """Extract the job id from a filename.
|
738 | ea03467c | Iustin Pop |
|
739 | ea03467c | Iustin Pop | @type name: str
|
740 | ea03467c | Iustin Pop | @param name: the job filename
|
741 | ea03467c | Iustin Pop | @rtype: job id or None
|
742 | ea03467c | Iustin Pop | @return: the job id corresponding to the given filename,
|
743 | ea03467c | Iustin Pop | or None if the filename does not represent a valid
|
744 | ea03467c | Iustin Pop | job file
|
745 | ea03467c | Iustin Pop |
|
746 | ea03467c | Iustin Pop | """
|
747 | 85f03e0d | Michael Hanselmann | m = cls._RE_JOB_FILE.match(name) |
748 | fae737ac | Michael Hanselmann | if m:
|
749 | fae737ac | Michael Hanselmann | return m.group(1) |
750 | fae737ac | Michael Hanselmann | else:
|
751 | fae737ac | Michael Hanselmann | return None |
752 | fae737ac | Michael Hanselmann | |
753 | 911a495b | Iustin Pop | def _GetJobIDsUnlocked(self, archived=False): |
754 | 911a495b | Iustin Pop | """Return all known job IDs.
|
755 | 911a495b | Iustin Pop |
|
756 | 911a495b | Iustin Pop | If the parameter archived is True, archived jobs IDs will be
|
757 | 911a495b | Iustin Pop | included. Currently this argument is unused.
|
758 | 911a495b | Iustin Pop |
|
759 | ac0930b9 | Iustin Pop | The method only looks at disk because it's a requirement that all
|
760 | ac0930b9 | Iustin Pop | jobs are present on disk (so in the _memcache we don't have any
|
761 | ac0930b9 | Iustin Pop | extra IDs).
|
762 | ac0930b9 | Iustin Pop |
|
763 | ea03467c | Iustin Pop | @rtype: list
|
764 | ea03467c | Iustin Pop | @return: the list of job IDs
|
765 | ea03467c | Iustin Pop |
|
766 | 911a495b | Iustin Pop | """
|
767 | fae737ac | Michael Hanselmann | jlist = [self._ExtractJobID(name) for name in self._ListJobFiles()] |
768 | 3b87986e | Iustin Pop | jlist = utils.NiceSort(jlist) |
769 | f0d874fe | Iustin Pop | return jlist
|
770 | 911a495b | Iustin Pop | |
771 | f1da30e6 | Michael Hanselmann | def _ListJobFiles(self): |
772 | ea03467c | Iustin Pop | """Returns the list of current job files.
|
773 | ea03467c | Iustin Pop |
|
774 | ea03467c | Iustin Pop | @rtype: list
|
775 | ea03467c | Iustin Pop | @return: the list of job file names
|
776 | ea03467c | Iustin Pop |
|
777 | ea03467c | Iustin Pop | """
|
778 | f1da30e6 | Michael Hanselmann | return [name for name in utils.ListVisibleFiles(constants.QUEUE_DIR) |
779 | f1da30e6 | Michael Hanselmann | if self._RE_JOB_FILE.match(name)] |
780 | f1da30e6 | Michael Hanselmann | |
781 | 911a495b | Iustin Pop | def _LoadJobUnlocked(self, job_id): |
782 | ea03467c | Iustin Pop | """Loads a job from the disk or memory.
|
783 | ea03467c | Iustin Pop |
|
784 | ea03467c | Iustin Pop | Given a job id, this will return the cached job object if
|
785 | ea03467c | Iustin Pop | existing, or try to load the job from the disk. If loading from
|
786 | ea03467c | Iustin Pop | disk, it will also add the job to the cache.
|
787 | ea03467c | Iustin Pop |
|
788 | ea03467c | Iustin Pop | @param job_id: the job id
|
789 | ea03467c | Iustin Pop | @rtype: L{_QueuedJob} or None
|
790 | ea03467c | Iustin Pop | @return: either None or the job object
|
791 | ea03467c | Iustin Pop |
|
792 | ea03467c | Iustin Pop | """
|
793 | 5685c1a5 | Michael Hanselmann | job = self._memcache.get(job_id, None) |
794 | 5685c1a5 | Michael Hanselmann | if job:
|
795 | 205d71fd | Michael Hanselmann | logging.debug("Found job %s in memcache", job_id)
|
796 | 5685c1a5 | Michael Hanselmann | return job
|
797 | ac0930b9 | Iustin Pop | |
798 | 911a495b | Iustin Pop | filepath = self._GetJobPath(job_id)
|
799 | f1da30e6 | Michael Hanselmann | logging.debug("Loading job from %s", filepath)
|
800 | f1da30e6 | Michael Hanselmann | try:
|
801 | f1da30e6 | Michael Hanselmann | fd = open(filepath, "r") |
802 | f1da30e6 | Michael Hanselmann | except IOError, err: |
803 | f1da30e6 | Michael Hanselmann | if err.errno in (errno.ENOENT, ): |
804 | f1da30e6 | Michael Hanselmann | return None |
805 | f1da30e6 | Michael Hanselmann | raise
|
806 | f1da30e6 | Michael Hanselmann | try:
|
807 | f1da30e6 | Michael Hanselmann | data = serializer.LoadJson(fd.read()) |
808 | f1da30e6 | Michael Hanselmann | finally:
|
809 | f1da30e6 | Michael Hanselmann | fd.close() |
810 | f1da30e6 | Michael Hanselmann | |
811 | 94ed59a5 | Iustin Pop | try:
|
812 | 94ed59a5 | Iustin Pop | job = _QueuedJob.Restore(self, data)
|
813 | 94ed59a5 | Iustin Pop | except Exception, err: |
814 | 94ed59a5 | Iustin Pop | new_path = self._GetArchivedJobPath(job_id)
|
815 | 94ed59a5 | Iustin Pop | if filepath == new_path:
|
816 | 94ed59a5 | Iustin Pop | # job already archived (future case)
|
817 | 94ed59a5 | Iustin Pop | logging.exception("Can't parse job %s", job_id)
|
818 | 94ed59a5 | Iustin Pop | else:
|
819 | 94ed59a5 | Iustin Pop | # non-archived case
|
820 | 94ed59a5 | Iustin Pop | logging.exception("Can't parse job %s, will archive.", job_id)
|
821 | 94ed59a5 | Iustin Pop | self._RenameFileUnlocked(filepath, new_path)
|
822 | 94ed59a5 | Iustin Pop | return None |
823 | 94ed59a5 | Iustin Pop | |
824 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
825 | 205d71fd | Michael Hanselmann | logging.debug("Added job %s to the cache", job_id)
|
826 | ac0930b9 | Iustin Pop | return job
|
827 | f1da30e6 | Michael Hanselmann | |
828 | f1da30e6 | Michael Hanselmann | def _GetJobsUnlocked(self, job_ids): |
829 | ea03467c | Iustin Pop | """Return a list of jobs based on their IDs.
|
830 | ea03467c | Iustin Pop |
|
831 | ea03467c | Iustin Pop | @type job_ids: list
|
832 | ea03467c | Iustin Pop | @param job_ids: either an empty list (meaning all jobs),
|
833 | ea03467c | Iustin Pop | or a list of job IDs
|
834 | ea03467c | Iustin Pop | @rtype: list
|
835 | ea03467c | Iustin Pop | @return: the list of job objects
|
836 | ea03467c | Iustin Pop |
|
837 | ea03467c | Iustin Pop | """
|
838 | 911a495b | Iustin Pop | if not job_ids: |
839 | 911a495b | Iustin Pop | job_ids = self._GetJobIDsUnlocked()
|
840 | f1da30e6 | Michael Hanselmann | |
841 | 911a495b | Iustin Pop | return [self._LoadJobUnlocked(job_id) for job_id in job_ids] |
842 | f1da30e6 | Michael Hanselmann | |
843 | 686d7433 | Iustin Pop | @staticmethod
|
844 | 686d7433 | Iustin Pop | def _IsQueueMarkedDrain(): |
845 | 686d7433 | Iustin Pop | """Check if the queue is marked from drain.
|
846 | 686d7433 | Iustin Pop |
|
847 | 686d7433 | Iustin Pop | This currently uses the queue drain file, which makes it a
|
848 | 686d7433 | Iustin Pop | per-node flag. In the future this can be moved to the config file.
|
849 | 686d7433 | Iustin Pop |
|
850 | ea03467c | Iustin Pop | @rtype: boolean
|
851 | ea03467c | Iustin Pop | @return: True of the job queue is marked for draining
|
852 | ea03467c | Iustin Pop |
|
853 | 686d7433 | Iustin Pop | """
|
854 | 686d7433 | Iustin Pop | return os.path.exists(constants.JOB_QUEUE_DRAIN_FILE)
|
855 | 686d7433 | Iustin Pop | |
856 | 3ccafd0e | Iustin Pop | @staticmethod
|
857 | 3ccafd0e | Iustin Pop | def SetDrainFlag(drain_flag): |
858 | 3ccafd0e | Iustin Pop | """Sets the drain flag for the queue.
|
859 | 3ccafd0e | Iustin Pop |
|
860 | 3ccafd0e | Iustin Pop | This is similar to the function L{backend.JobQueueSetDrainFlag},
|
861 | 3ccafd0e | Iustin Pop | and in the future we might merge them.
|
862 | 3ccafd0e | Iustin Pop |
|
863 | ea03467c | Iustin Pop | @type drain_flag: boolean
|
864 | ea03467c | Iustin Pop | @param drain_flag: wheter to set or unset the drain flag
|
865 | ea03467c | Iustin Pop |
|
866 | 3ccafd0e | Iustin Pop | """
|
867 | 3ccafd0e | Iustin Pop | if drain_flag:
|
868 | 3ccafd0e | Iustin Pop | utils.WriteFile(constants.JOB_QUEUE_DRAIN_FILE, data="", close=True) |
869 | 3ccafd0e | Iustin Pop | else:
|
870 | 3ccafd0e | Iustin Pop | utils.RemoveFile(constants.JOB_QUEUE_DRAIN_FILE) |
871 | 3ccafd0e | Iustin Pop | return True |
872 | 3ccafd0e | Iustin Pop | |
873 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
874 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
875 | 4c848b18 | Michael Hanselmann | def SubmitJob(self, ops): |
876 | 85f03e0d | Michael Hanselmann | """Create and store a new job.
|
877 | f1da30e6 | Michael Hanselmann |
|
878 | 85f03e0d | Michael Hanselmann | This enters the job into our job queue and also puts it on the new
|
879 | 85f03e0d | Michael Hanselmann | queue, in order for it to be picked up by the queue processors.
|
880 | c3f0a12f | Iustin Pop |
|
881 | c3f0a12f | Iustin Pop | @type ops: list
|
882 | 205d71fd | Michael Hanselmann | @param ops: The list of OpCodes that will become the new job.
|
883 | ea03467c | Iustin Pop | @rtype: job ID
|
884 | ea03467c | Iustin Pop | @return: the job ID of the newly created job
|
885 | ea03467c | Iustin Pop | @raise errors.JobQueueDrainError: if the job is marked for draining
|
886 | c3f0a12f | Iustin Pop |
|
887 | c3f0a12f | Iustin Pop | """
|
888 | 686d7433 | Iustin Pop | if self._IsQueueMarkedDrain(): |
889 | 686d7433 | Iustin Pop | raise errors.JobQueueDrainError()
|
890 | f1da30e6 | Michael Hanselmann | # Get job identifier
|
891 | 4c848b18 | Michael Hanselmann | job_id = self._NewSerialUnlocked()
|
892 | f1da30e6 | Michael Hanselmann | job = _QueuedJob(self, job_id, ops)
|
893 | f1da30e6 | Michael Hanselmann | |
894 | f1da30e6 | Michael Hanselmann | # Write to disk
|
895 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
896 | f1da30e6 | Michael Hanselmann | |
897 | 5685c1a5 | Michael Hanselmann | logging.debug("Adding new job %s to the cache", job_id)
|
898 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
899 | ac0930b9 | Iustin Pop | |
900 | 85f03e0d | Michael Hanselmann | # Add to worker pool
|
901 | 85f03e0d | Michael Hanselmann | self._wpool.AddTask(job)
|
902 | 85f03e0d | Michael Hanselmann | |
903 | 85f03e0d | Michael Hanselmann | return job.id
|
904 | f1da30e6 | Michael Hanselmann | |
905 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
906 | 85f03e0d | Michael Hanselmann | def UpdateJobUnlocked(self, job): |
907 | ea03467c | Iustin Pop | """Update a job's on disk storage.
|
908 | ea03467c | Iustin Pop |
|
909 | ea03467c | Iustin Pop | After a job has been modified, this function needs to be called in
|
910 | ea03467c | Iustin Pop | order to write the changes to disk and replicate them to the other
|
911 | ea03467c | Iustin Pop | nodes.
|
912 | ea03467c | Iustin Pop |
|
913 | ea03467c | Iustin Pop | @type job: L{_QueuedJob}
|
914 | ea03467c | Iustin Pop | @param job: the changed job
|
915 | ea03467c | Iustin Pop |
|
916 | ea03467c | Iustin Pop | """
|
917 | f1da30e6 | Michael Hanselmann | filename = self._GetJobPath(job.id)
|
918 | 23752136 | Michael Hanselmann | data = serializer.DumpJson(job.Serialize(), indent=False)
|
919 | f1da30e6 | Michael Hanselmann | logging.debug("Writing job %s to %s", job.id, filename)
|
920 | 23752136 | Michael Hanselmann | self._WriteAndReplicateFileUnlocked(filename, data)
|
921 | ac0930b9 | Iustin Pop | |
922 | dfe57c22 | Michael Hanselmann | # Notify waiters about potential changes
|
923 | 6c5a7090 | Michael Hanselmann | job.change.notifyAll() |
924 | dfe57c22 | Michael Hanselmann | |
925 | 6c5a7090 | Michael Hanselmann | @utils.LockedMethod
|
926 | dfe57c22 | Michael Hanselmann | @_RequireOpenQueue
|
927 | 5c735209 | Iustin Pop | def WaitForJobChanges(self, job_id, fields, prev_job_info, prev_log_serial, |
928 | 5c735209 | Iustin Pop | timeout): |
929 | 6c5a7090 | Michael Hanselmann | """Waits for changes in a job.
|
930 | 6c5a7090 | Michael Hanselmann |
|
931 | 6c5a7090 | Michael Hanselmann | @type job_id: string
|
932 | 6c5a7090 | Michael Hanselmann | @param job_id: Job identifier
|
933 | 6c5a7090 | Michael Hanselmann | @type fields: list of strings
|
934 | 6c5a7090 | Michael Hanselmann | @param fields: Which fields to check for changes
|
935 | 6c5a7090 | Michael Hanselmann | @type prev_job_info: list or None
|
936 | 6c5a7090 | Michael Hanselmann | @param prev_job_info: Last job information returned
|
937 | 6c5a7090 | Michael Hanselmann | @type prev_log_serial: int
|
938 | 6c5a7090 | Michael Hanselmann | @param prev_log_serial: Last job message serial number
|
939 | 5c735209 | Iustin Pop | @type timeout: float
|
940 | 5c735209 | Iustin Pop | @param timeout: maximum time to wait
|
941 | ea03467c | Iustin Pop | @rtype: tuple (job info, log entries)
|
942 | ea03467c | Iustin Pop | @return: a tuple of the job information as required via
|
943 | ea03467c | Iustin Pop | the fields parameter, and the log entries as a list
|
944 | ea03467c | Iustin Pop |
|
945 | ea03467c | Iustin Pop | if the job has not changed and the timeout has expired,
|
946 | ea03467c | Iustin Pop | we instead return a special value,
|
947 | ea03467c | Iustin Pop | L{constants.JOB_NOTCHANGED}, which should be interpreted
|
948 | ea03467c | Iustin Pop | as such by the clients
|
949 | 6c5a7090 | Michael Hanselmann |
|
950 | 6c5a7090 | Michael Hanselmann | """
|
951 | dfe57c22 | Michael Hanselmann | logging.debug("Waiting for changes in job %s", job_id)
|
952 | 5c735209 | Iustin Pop | end_time = time.time() + timeout |
953 | dfe57c22 | Michael Hanselmann | while True: |
954 | 5c735209 | Iustin Pop | delta_time = end_time - time.time() |
955 | 5c735209 | Iustin Pop | if delta_time < 0: |
956 | 5c735209 | Iustin Pop | return constants.JOB_NOTCHANGED
|
957 | 5c735209 | Iustin Pop | |
958 | 6c5a7090 | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
959 | 6c5a7090 | Michael Hanselmann | if not job: |
960 | 6c5a7090 | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
961 | 6c5a7090 | Michael Hanselmann | break
|
962 | dfe57c22 | Michael Hanselmann | |
963 | 6c5a7090 | Michael Hanselmann | status = job.CalcStatus() |
964 | 6c5a7090 | Michael Hanselmann | job_info = self._GetJobInfoUnlocked(job, fields)
|
965 | 6c5a7090 | Michael Hanselmann | log_entries = job.GetLogEntries(prev_log_serial) |
966 | dfe57c22 | Michael Hanselmann | |
967 | dfe57c22 | Michael Hanselmann | # Serializing and deserializing data can cause type changes (e.g. from
|
968 | dfe57c22 | Michael Hanselmann | # tuple to list) or precision loss. We're doing it here so that we get
|
969 | dfe57c22 | Michael Hanselmann | # the same modifications as the data received from the client. Without
|
970 | dfe57c22 | Michael Hanselmann | # this, the comparison afterwards might fail without the data being
|
971 | dfe57c22 | Michael Hanselmann | # significantly different.
|
972 | 6c5a7090 | Michael Hanselmann | job_info = serializer.LoadJson(serializer.DumpJson(job_info)) |
973 | 6c5a7090 | Michael Hanselmann | log_entries = serializer.LoadJson(serializer.DumpJson(log_entries)) |
974 | dfe57c22 | Michael Hanselmann | |
975 | 6c5a7090 | Michael Hanselmann | if status not in (constants.JOB_STATUS_QUEUED, |
976 | e92376d7 | Iustin Pop | constants.JOB_STATUS_RUNNING, |
977 | e92376d7 | Iustin Pop | constants.JOB_STATUS_WAITLOCK): |
978 | 6c5a7090 | Michael Hanselmann | # Don't even try to wait if the job is no longer running, there will be
|
979 | 6c5a7090 | Michael Hanselmann | # no changes.
|
980 | dfe57c22 | Michael Hanselmann | break
|
981 | dfe57c22 | Michael Hanselmann | |
982 | 6c5a7090 | Michael Hanselmann | if (prev_job_info != job_info or |
983 | 6c5a7090 | Michael Hanselmann | (log_entries and prev_log_serial != log_entries[0][0])): |
984 | 6c5a7090 | Michael Hanselmann | break
|
985 | 6c5a7090 | Michael Hanselmann | |
986 | 6c5a7090 | Michael Hanselmann | logging.debug("Waiting again")
|
987 | 6c5a7090 | Michael Hanselmann | |
988 | 6c5a7090 | Michael Hanselmann | # Release the queue lock while waiting
|
989 | 5c735209 | Iustin Pop | job.change.wait(delta_time) |
990 | dfe57c22 | Michael Hanselmann | |
991 | dfe57c22 | Michael Hanselmann | logging.debug("Job %s changed", job_id)
|
992 | dfe57c22 | Michael Hanselmann | |
993 | 6c5a7090 | Michael Hanselmann | return (job_info, log_entries)
|
994 | dfe57c22 | Michael Hanselmann | |
995 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
996 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
997 | 188c5e0a | Michael Hanselmann | def CancelJob(self, job_id): |
998 | 188c5e0a | Michael Hanselmann | """Cancels a job.
|
999 | 188c5e0a | Michael Hanselmann |
|
1000 | ea03467c | Iustin Pop | This will only succeed if the job has not started yet.
|
1001 | ea03467c | Iustin Pop |
|
1002 | 188c5e0a | Michael Hanselmann | @type job_id: string
|
1003 | ea03467c | Iustin Pop | @param job_id: job ID of job to be cancelled.
|
1004 | 188c5e0a | Michael Hanselmann |
|
1005 | 188c5e0a | Michael Hanselmann | """
|
1006 | 188c5e0a | Michael Hanselmann | logging.debug("Cancelling job %s", job_id)
|
1007 | 188c5e0a | Michael Hanselmann | |
1008 | 85f03e0d | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
1009 | 188c5e0a | Michael Hanselmann | if not job: |
1010 | 188c5e0a | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
1011 | 188c5e0a | Michael Hanselmann | return
|
1012 | 188c5e0a | Michael Hanselmann | |
1013 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_QUEUED,): |
1014 | 188c5e0a | Michael Hanselmann | logging.debug("Job %s is no longer in the queue", job.id)
|
1015 | 188c5e0a | Michael Hanselmann | return
|
1016 | 188c5e0a | Michael Hanselmann | |
1017 | 85f03e0d | Michael Hanselmann | try:
|
1018 | 85f03e0d | Michael Hanselmann | for op in job.ops: |
1019 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
1020 | 85f03e0d | Michael Hanselmann | op.result = "Job cancelled by request"
|
1021 | 85f03e0d | Michael Hanselmann | finally:
|
1022 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
1023 | 188c5e0a | Michael Hanselmann | |
1024 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
1025 | 07cd723a | Iustin Pop | def _ArchiveJobUnlocked(self, job_id): |
1026 | c609f802 | Michael Hanselmann | """Archives a job.
|
1027 | c609f802 | Michael Hanselmann |
|
1028 | c609f802 | Michael Hanselmann | @type job_id: string
|
1029 | c609f802 | Michael Hanselmann | @param job_id: Job ID of job to be archived.
|
1030 | c609f802 | Michael Hanselmann |
|
1031 | c609f802 | Michael Hanselmann | """
|
1032 | 07cd723a | Iustin Pop | logging.info("Archiving job %s", job_id)
|
1033 | c609f802 | Michael Hanselmann | |
1034 | c609f802 | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
1035 | c609f802 | Michael Hanselmann | if not job: |
1036 | c609f802 | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
1037 | c609f802 | Michael Hanselmann | return
|
1038 | c609f802 | Michael Hanselmann | |
1039 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_CANCELED, |
1040 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_SUCCESS, |
1041 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_ERROR): |
1042 | 85f03e0d | Michael Hanselmann | logging.debug("Job %s is not yet done", job.id)
|
1043 | c609f802 | Michael Hanselmann | return
|
1044 | c609f802 | Michael Hanselmann | |
1045 | 5685c1a5 | Michael Hanselmann | old = self._GetJobPath(job.id)
|
1046 | 5685c1a5 | Michael Hanselmann | new = self._GetArchivedJobPath(job.id)
|
1047 | c609f802 | Michael Hanselmann | |
1048 | 5685c1a5 | Michael Hanselmann | self._RenameFileUnlocked(old, new)
|
1049 | c609f802 | Michael Hanselmann | |
1050 | 5685c1a5 | Michael Hanselmann | logging.debug("Successfully archived job %s", job.id)
|
1051 | f1da30e6 | Michael Hanselmann | |
1052 | 07cd723a | Iustin Pop | @utils.LockedMethod
|
1053 | 07cd723a | Iustin Pop | @_RequireOpenQueue
|
1054 | 07cd723a | Iustin Pop | def ArchiveJob(self, job_id): |
1055 | 07cd723a | Iustin Pop | """Archives a job.
|
1056 | 07cd723a | Iustin Pop |
|
1057 | ea03467c | Iustin Pop | This is just a wrapper over L{_ArchiveJobUnlocked}.
|
1058 | ea03467c | Iustin Pop |
|
1059 | 07cd723a | Iustin Pop | @type job_id: string
|
1060 | 07cd723a | Iustin Pop | @param job_id: Job ID of job to be archived.
|
1061 | 07cd723a | Iustin Pop |
|
1062 | 07cd723a | Iustin Pop | """
|
1063 | 07cd723a | Iustin Pop | return self._ArchiveJobUnlocked(job_id) |
1064 | 07cd723a | Iustin Pop | |
1065 | 07cd723a | Iustin Pop | @utils.LockedMethod
|
1066 | 07cd723a | Iustin Pop | @_RequireOpenQueue
|
1067 | 07cd723a | Iustin Pop | def AutoArchiveJobs(self, age): |
1068 | 07cd723a | Iustin Pop | """Archives all jobs based on age.
|
1069 | 07cd723a | Iustin Pop |
|
1070 | 07cd723a | Iustin Pop | The method will archive all jobs which are older than the age
|
1071 | 07cd723a | Iustin Pop | parameter. For jobs that don't have an end timestamp, the start
|
1072 | 07cd723a | Iustin Pop | timestamp will be considered. The special '-1' age will cause
|
1073 | 07cd723a | Iustin Pop | archival of all jobs (that are not running or queued).
|
1074 | 07cd723a | Iustin Pop |
|
1075 | 07cd723a | Iustin Pop | @type age: int
|
1076 | 07cd723a | Iustin Pop | @param age: the minimum age in seconds
|
1077 | 07cd723a | Iustin Pop |
|
1078 | 07cd723a | Iustin Pop | """
|
1079 | 07cd723a | Iustin Pop | logging.info("Archiving jobs with age more than %s seconds", age)
|
1080 | 07cd723a | Iustin Pop | |
1081 | 07cd723a | Iustin Pop | now = time.time() |
1082 | 07cd723a | Iustin Pop | for jid in self._GetJobIDsUnlocked(archived=False): |
1083 | 07cd723a | Iustin Pop | job = self._LoadJobUnlocked(jid)
|
1084 | 07cd723a | Iustin Pop | if job.CalcStatus() not in (constants.OP_STATUS_SUCCESS, |
1085 | 07cd723a | Iustin Pop | constants.OP_STATUS_ERROR, |
1086 | 07cd723a | Iustin Pop | constants.OP_STATUS_CANCELED): |
1087 | 07cd723a | Iustin Pop | continue
|
1088 | 07cd723a | Iustin Pop | if job.end_timestamp is None: |
1089 | 07cd723a | Iustin Pop | if job.start_timestamp is None: |
1090 | 07cd723a | Iustin Pop | job_age = job.received_timestamp |
1091 | 07cd723a | Iustin Pop | else:
|
1092 | 07cd723a | Iustin Pop | job_age = job.start_timestamp |
1093 | 07cd723a | Iustin Pop | else:
|
1094 | 07cd723a | Iustin Pop | job_age = job.end_timestamp |
1095 | 07cd723a | Iustin Pop | |
1096 | 07cd723a | Iustin Pop | if age == -1 or now - job_age[0] > age: |
1097 | 07cd723a | Iustin Pop | self._ArchiveJobUnlocked(jid)
|
1098 | 07cd723a | Iustin Pop | |
1099 | 85f03e0d | Michael Hanselmann | def _GetJobInfoUnlocked(self, job, fields): |
1100 | ea03467c | Iustin Pop | """Returns information about a job.
|
1101 | ea03467c | Iustin Pop |
|
1102 | ea03467c | Iustin Pop | @type job: L{_QueuedJob}
|
1103 | ea03467c | Iustin Pop | @param job: the job which we query
|
1104 | ea03467c | Iustin Pop | @type fields: list
|
1105 | ea03467c | Iustin Pop | @param fields: names of fields to return
|
1106 | ea03467c | Iustin Pop | @rtype: list
|
1107 | ea03467c | Iustin Pop | @return: list with one element for each field
|
1108 | ea03467c | Iustin Pop | @raise errors.OpExecError: when an invalid field
|
1109 | ea03467c | Iustin Pop | has been passed
|
1110 | ea03467c | Iustin Pop |
|
1111 | ea03467c | Iustin Pop | """
|
1112 | e2715f69 | Michael Hanselmann | row = [] |
1113 | e2715f69 | Michael Hanselmann | for fname in fields: |
1114 | e2715f69 | Michael Hanselmann | if fname == "id": |
1115 | e2715f69 | Michael Hanselmann | row.append(job.id) |
1116 | e2715f69 | Michael Hanselmann | elif fname == "status": |
1117 | 85f03e0d | Michael Hanselmann | row.append(job.CalcStatus()) |
1118 | af30b2fd | Michael Hanselmann | elif fname == "ops": |
1119 | 85f03e0d | Michael Hanselmann | row.append([op.input.__getstate__() for op in job.ops]) |
1120 | af30b2fd | Michael Hanselmann | elif fname == "opresult": |
1121 | 85f03e0d | Michael Hanselmann | row.append([op.result for op in job.ops]) |
1122 | af30b2fd | Michael Hanselmann | elif fname == "opstatus": |
1123 | 85f03e0d | Michael Hanselmann | row.append([op.status for op in job.ops]) |
1124 | 5b23c34c | Iustin Pop | elif fname == "oplog": |
1125 | 5b23c34c | Iustin Pop | row.append([op.log for op in job.ops]) |
1126 | c56ec146 | Iustin Pop | elif fname == "opstart": |
1127 | c56ec146 | Iustin Pop | row.append([op.start_timestamp for op in job.ops]) |
1128 | c56ec146 | Iustin Pop | elif fname == "opend": |
1129 | c56ec146 | Iustin Pop | row.append([op.end_timestamp for op in job.ops]) |
1130 | c56ec146 | Iustin Pop | elif fname == "received_ts": |
1131 | c56ec146 | Iustin Pop | row.append(job.received_timestamp) |
1132 | c56ec146 | Iustin Pop | elif fname == "start_ts": |
1133 | c56ec146 | Iustin Pop | row.append(job.start_timestamp) |
1134 | c56ec146 | Iustin Pop | elif fname == "end_ts": |
1135 | c56ec146 | Iustin Pop | row.append(job.end_timestamp) |
1136 | 60dd1473 | Iustin Pop | elif fname == "summary": |
1137 | 60dd1473 | Iustin Pop | row.append([op.input.Summary() for op in job.ops]) |
1138 | e2715f69 | Michael Hanselmann | else:
|
1139 | e2715f69 | Michael Hanselmann | raise errors.OpExecError("Invalid job query field '%s'" % fname) |
1140 | e2715f69 | Michael Hanselmann | return row
|
1141 | e2715f69 | Michael Hanselmann | |
1142 | 85f03e0d | Michael Hanselmann | @utils.LockedMethod
|
1143 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
1144 | e2715f69 | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
1145 | e2715f69 | Michael Hanselmann | """Returns a list of jobs in queue.
|
1146 | e2715f69 | Michael Hanselmann |
|
1147 | ea03467c | Iustin Pop | This is a wrapper of L{_GetJobsUnlocked}, which actually does the
|
1148 | ea03467c | Iustin Pop | processing for each job.
|
1149 | ea03467c | Iustin Pop |
|
1150 | ea03467c | Iustin Pop | @type job_ids: list
|
1151 | ea03467c | Iustin Pop | @param job_ids: sequence of job identifiers or None for all
|
1152 | ea03467c | Iustin Pop | @type fields: list
|
1153 | ea03467c | Iustin Pop | @param fields: names of fields to return
|
1154 | ea03467c | Iustin Pop | @rtype: list
|
1155 | ea03467c | Iustin Pop | @return: list one element per job, each element being list with
|
1156 | ea03467c | Iustin Pop | the requested fields
|
1157 | e2715f69 | Michael Hanselmann |
|
1158 | e2715f69 | Michael Hanselmann | """
|
1159 | 85f03e0d | Michael Hanselmann | jobs = [] |
1160 | e2715f69 | Michael Hanselmann | |
1161 | 85f03e0d | Michael Hanselmann | for job in self._GetJobsUnlocked(job_ids): |
1162 | 85f03e0d | Michael Hanselmann | if job is None: |
1163 | 85f03e0d | Michael Hanselmann | jobs.append(None)
|
1164 | 85f03e0d | Michael Hanselmann | else:
|
1165 | 85f03e0d | Michael Hanselmann | jobs.append(self._GetJobInfoUnlocked(job, fields))
|
1166 | e2715f69 | Michael Hanselmann | |
1167 | 85f03e0d | Michael Hanselmann | return jobs
|
1168 | e2715f69 | Michael Hanselmann | |
1169 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
1170 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
1171 | e2715f69 | Michael Hanselmann | def Shutdown(self): |
1172 | e2715f69 | Michael Hanselmann | """Stops the job queue.
|
1173 | e2715f69 | Michael Hanselmann |
|
1174 | ea03467c | Iustin Pop | This shutdowns all the worker threads an closes the queue.
|
1175 | ea03467c | Iustin Pop |
|
1176 | e2715f69 | Michael Hanselmann | """
|
1177 | e2715f69 | Michael Hanselmann | self._wpool.TerminateWorkers()
|
1178 | 85f03e0d | Michael Hanselmann | |
1179 | 04ab05ce | Michael Hanselmann | self._queue_lock.Close()
|
1180 | 04ab05ce | Michael Hanselmann | self._queue_lock = None |