root / lib / jqueue.py @ 5d6fb8eb
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2 | 498ae1cc | Iustin Pop | #
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3 | 498ae1cc | Iustin Pop | |
4 | 498ae1cc | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
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5 | 498ae1cc | Iustin Pop | #
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6 | 498ae1cc | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | 498ae1cc | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | 498ae1cc | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | 498ae1cc | Iustin Pop | # (at your option) any later version.
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10 | 498ae1cc | Iustin Pop | #
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11 | 498ae1cc | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | 498ae1cc | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 498ae1cc | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 498ae1cc | Iustin Pop | # General Public License for more details.
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15 | 498ae1cc | Iustin Pop | #
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16 | 498ae1cc | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | 498ae1cc | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | 498ae1cc | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | 498ae1cc | Iustin Pop | # 02110-1301, USA.
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20 | 498ae1cc | Iustin Pop | |
21 | 498ae1cc | Iustin Pop | |
22 | 498ae1cc | Iustin Pop | """Module implementing the job queue handling."""
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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 | f1048938 | Iustin Pop | import time |
30 | 498ae1cc | Iustin Pop | |
31 | e2715f69 | Michael Hanselmann | from ganeti import constants |
32 | f1da30e6 | Michael Hanselmann | from ganeti import serializer |
33 | e2715f69 | Michael Hanselmann | from ganeti import workerpool |
34 | f1da30e6 | Michael Hanselmann | from ganeti import opcodes |
35 | 7a1ecaed | Iustin Pop | from ganeti import errors |
36 | e2715f69 | Michael Hanselmann | from ganeti import mcpu |
37 | 7996a135 | Iustin Pop | from ganeti import utils |
38 | 04ab05ce | Michael Hanselmann | from ganeti import jstore |
39 | c3f0a12f | Iustin Pop | from ganeti import rpc |
40 | e2715f69 | Michael Hanselmann | |
41 | e2715f69 | Michael Hanselmann | |
42 | e2715f69 | Michael Hanselmann | JOBQUEUE_THREADS = 5
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43 | e2715f69 | Michael Hanselmann | |
44 | 498ae1cc | Iustin Pop | |
45 | e2715f69 | Michael Hanselmann | class _QueuedOpCode(object): |
46 | e2715f69 | Michael Hanselmann | """Encasulates an opcode object.
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47 | e2715f69 | Michael Hanselmann |
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48 | 307149a8 | Iustin Pop | Access is synchronized by the '_lock' attribute.
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49 | e2715f69 | Michael Hanselmann |
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50 | f1048938 | Iustin Pop | The 'log' attribute holds the execution log and consists of tuples
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51 | f1048938 | Iustin Pop | of the form (timestamp, level, message).
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52 | f1048938 | Iustin Pop |
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53 | e2715f69 | Michael Hanselmann | """
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54 | 85f03e0d | Michael Hanselmann | def __new__(cls, *args, **kwargs): |
55 | 85f03e0d | Michael Hanselmann | obj = object.__new__(cls, *args, **kwargs)
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56 | 85f03e0d | Michael Hanselmann | # Create a special lock for logging
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57 | 85f03e0d | Michael Hanselmann | obj._log_lock = threading.Lock() |
58 | 85f03e0d | Michael Hanselmann | return obj
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59 | f1da30e6 | Michael Hanselmann | |
60 | 85f03e0d | Michael Hanselmann | def __init__(self, op): |
61 | 85f03e0d | Michael Hanselmann | self.input = op
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62 | 85f03e0d | Michael Hanselmann | self.status = constants.OP_STATUS_QUEUED
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63 | 85f03e0d | Michael Hanselmann | self.result = None |
64 | 85f03e0d | Michael Hanselmann | self.log = []
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65 | f1da30e6 | Michael Hanselmann | |
66 | f1da30e6 | Michael Hanselmann | @classmethod
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67 | f1da30e6 | Michael Hanselmann | def Restore(cls, state): |
68 | 85f03e0d | Michael Hanselmann | obj = _QueuedOpCode.__new__(cls) |
69 | 85f03e0d | Michael Hanselmann | obj.input = opcodes.OpCode.LoadOpCode(state["input"])
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70 | 85f03e0d | Michael Hanselmann | obj.status = state["status"]
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71 | 85f03e0d | Michael Hanselmann | obj.result = state["result"]
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72 | 85f03e0d | Michael Hanselmann | obj.log = state["log"]
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73 | f1da30e6 | Michael Hanselmann | return obj
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74 | f1da30e6 | Michael Hanselmann | |
75 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
76 | 85f03e0d | Michael Hanselmann | self._log_lock.acquire()
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77 | 85f03e0d | Michael Hanselmann | try:
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78 | 85f03e0d | Michael Hanselmann | return {
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79 | 85f03e0d | Michael Hanselmann | "input": self.input.__getstate__(), |
80 | 85f03e0d | Michael Hanselmann | "status": self.status, |
81 | 85f03e0d | Michael Hanselmann | "result": self.result, |
82 | 85f03e0d | Michael Hanselmann | "log": self.log, |
83 | 85f03e0d | Michael Hanselmann | } |
84 | 85f03e0d | Michael Hanselmann | finally:
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85 | 85f03e0d | Michael Hanselmann | self._log_lock.release()
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86 | e2715f69 | Michael Hanselmann | |
87 | f1048938 | Iustin Pop | def Log(self, *args): |
88 | f1048938 | Iustin Pop | """Append a log entry.
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89 | f1048938 | Iustin Pop |
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90 | f1048938 | Iustin Pop | """
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91 | 85f03e0d | Michael Hanselmann | assert len(args) < 3 |
92 | f1048938 | Iustin Pop | |
93 | f1048938 | Iustin Pop | if len(args) == 1: |
94 | f1048938 | Iustin Pop | log_type = constants.ELOG_MESSAGE |
95 | f1048938 | Iustin Pop | log_msg = args[0]
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96 | f1048938 | Iustin Pop | else:
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97 | f1048938 | Iustin Pop | log_type, log_msg = args |
98 | f1048938 | Iustin Pop | |
99 | 85f03e0d | Michael Hanselmann | self._log_lock.acquire()
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100 | 85f03e0d | Michael Hanselmann | try:
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101 | 85f03e0d | Michael Hanselmann | self.log.append((time.time(), log_type, log_msg))
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102 | 85f03e0d | Michael Hanselmann | finally:
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103 | 85f03e0d | Michael Hanselmann | self._log_lock.release()
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104 | 85f03e0d | Michael Hanselmann | |
105 | f1048938 | Iustin Pop | def RetrieveLog(self, start_at=0): |
106 | f1048938 | Iustin Pop | """Retrieve (a part of) the execution log.
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107 | f1048938 | Iustin Pop |
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108 | f1048938 | Iustin Pop | """
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109 | 85f03e0d | Michael Hanselmann | self._log_lock.acquire()
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110 | 85f03e0d | Michael Hanselmann | try:
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111 | 85f03e0d | Michael Hanselmann | return self.log[start_at:] |
112 | 85f03e0d | Michael Hanselmann | finally:
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113 | 85f03e0d | Michael Hanselmann | self._log_lock.release()
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114 | f1048938 | Iustin Pop | |
115 | e2715f69 | Michael Hanselmann | |
116 | e2715f69 | Michael Hanselmann | class _QueuedJob(object): |
117 | e2715f69 | Michael Hanselmann | """In-memory job representation.
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118 | e2715f69 | Michael Hanselmann |
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119 | e2715f69 | Michael Hanselmann | This is what we use to track the user-submitted jobs.
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120 | e2715f69 | Michael Hanselmann |
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121 | e2715f69 | Michael Hanselmann | """
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122 | 85f03e0d | Michael Hanselmann | def __init__(self, queue, job_id, ops): |
123 | e2715f69 | Michael Hanselmann | if not ops: |
124 | e2715f69 | Michael Hanselmann | # TODO
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125 | e2715f69 | Michael Hanselmann | raise Exception("No opcodes") |
126 | e2715f69 | Michael Hanselmann | |
127 | 85f03e0d | Michael Hanselmann | self.queue = queue
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128 | f1da30e6 | Michael Hanselmann | self.id = job_id
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129 | 85f03e0d | Michael Hanselmann | self.ops = [_QueuedOpCode(op) for op in ops] |
130 | 85f03e0d | Michael Hanselmann | self.run_op_index = -1 |
131 | f1da30e6 | Michael Hanselmann | |
132 | f1da30e6 | Michael Hanselmann | @classmethod
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133 | 85f03e0d | Michael Hanselmann | def Restore(cls, queue, state): |
134 | 85f03e0d | Michael Hanselmann | obj = _QueuedJob.__new__(cls) |
135 | 85f03e0d | Michael Hanselmann | obj.queue = queue |
136 | 85f03e0d | Michael Hanselmann | obj.id = state["id"]
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137 | 85f03e0d | Michael Hanselmann | obj.ops = [_QueuedOpCode.Restore(op_state) for op_state in state["ops"]] |
138 | 85f03e0d | Michael Hanselmann | obj.run_op_index = state["run_op_index"]
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139 | f1da30e6 | Michael Hanselmann | return obj
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140 | f1da30e6 | Michael Hanselmann | |
141 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
142 | f1da30e6 | Michael Hanselmann | return {
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143 | f1da30e6 | Michael Hanselmann | "id": self.id, |
144 | 85f03e0d | Michael Hanselmann | "ops": [op.Serialize() for op in self.ops], |
145 | f1048938 | Iustin Pop | "run_op_index": self.run_op_index, |
146 | f1da30e6 | Michael Hanselmann | } |
147 | f1da30e6 | Michael Hanselmann | |
148 | 85f03e0d | Michael Hanselmann | def CalcStatus(self): |
149 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_QUEUED |
150 | e2715f69 | Michael Hanselmann | |
151 | e2715f69 | Michael Hanselmann | all_success = True
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152 | 85f03e0d | Michael Hanselmann | for op in self.ops: |
153 | 85f03e0d | Michael Hanselmann | if op.status == constants.OP_STATUS_SUCCESS:
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154 | e2715f69 | Michael Hanselmann | continue
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155 | e2715f69 | Michael Hanselmann | |
156 | e2715f69 | Michael Hanselmann | all_success = False
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157 | e2715f69 | Michael Hanselmann | |
158 | 85f03e0d | Michael Hanselmann | if op.status == constants.OP_STATUS_QUEUED:
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159 | e2715f69 | Michael Hanselmann | pass
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160 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_RUNNING:
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161 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_RUNNING |
162 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_ERROR:
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163 | f1da30e6 | Michael Hanselmann | status = constants.JOB_STATUS_ERROR |
164 | f1da30e6 | Michael Hanselmann | # The whole job fails if one opcode failed
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165 | f1da30e6 | Michael Hanselmann | break
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166 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_CANCELED:
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167 | 4cb1d919 | Michael Hanselmann | status = constants.OP_STATUS_CANCELED |
168 | 4cb1d919 | Michael Hanselmann | break
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169 | e2715f69 | Michael Hanselmann | |
170 | e2715f69 | Michael Hanselmann | if all_success:
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171 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_SUCCESS |
172 | e2715f69 | Michael Hanselmann | |
173 | e2715f69 | Michael Hanselmann | return status
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174 | e2715f69 | Michael Hanselmann | |
175 | f1048938 | Iustin Pop | |
176 | 85f03e0d | Michael Hanselmann | class _JobQueueWorker(workerpool.BaseWorker): |
177 | 85f03e0d | Michael Hanselmann | def RunTask(self, job): |
178 | e2715f69 | Michael Hanselmann | """Job executor.
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179 | e2715f69 | Michael Hanselmann |
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180 | 85f03e0d | Michael Hanselmann | This functions processes a job.
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181 | e2715f69 | Michael Hanselmann |
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182 | e2715f69 | Michael Hanselmann | """
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183 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s processing job %s",
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184 | e2715f69 | Michael Hanselmann | self.worker_id, job.id)
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185 | 5bdce580 | Michael Hanselmann | proc = mcpu.Processor(self.pool.queue.context)
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186 | 85f03e0d | Michael Hanselmann | queue = job.queue |
187 | e2715f69 | Michael Hanselmann | try:
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188 | 85f03e0d | Michael Hanselmann | try:
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189 | 85f03e0d | Michael Hanselmann | count = len(job.ops)
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190 | 85f03e0d | Michael Hanselmann | for idx, op in enumerate(job.ops): |
191 | 85f03e0d | Michael Hanselmann | try:
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192 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Starting %s", idx + 1, count, op) |
193 | 85f03e0d | Michael Hanselmann | |
194 | 85f03e0d | Michael Hanselmann | queue.acquire() |
195 | 85f03e0d | Michael Hanselmann | try:
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196 | 85f03e0d | Michael Hanselmann | job.run_op_index = idx |
197 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_RUNNING |
198 | 85f03e0d | Michael Hanselmann | op.result = None
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199 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
200 | 85f03e0d | Michael Hanselmann | |
201 | 38206f3c | Iustin Pop | input_opcode = op.input |
202 | 85f03e0d | Michael Hanselmann | finally:
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203 | 85f03e0d | Michael Hanselmann | queue.release() |
204 | 85f03e0d | Michael Hanselmann | |
205 | 38206f3c | Iustin Pop | result = proc.ExecOpCode(input_opcode, op.Log) |
206 | 85f03e0d | Michael Hanselmann | |
207 | 85f03e0d | Michael Hanselmann | queue.acquire() |
208 | 85f03e0d | Michael Hanselmann | try:
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209 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_SUCCESS |
210 | 85f03e0d | Michael Hanselmann | op.result = result |
211 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
212 | 85f03e0d | Michael Hanselmann | finally:
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213 | 85f03e0d | Michael Hanselmann | queue.release() |
214 | 85f03e0d | Michael Hanselmann | |
215 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Successfully finished %s",
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216 | 85f03e0d | Michael Hanselmann | idx + 1, count, op)
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217 | 85f03e0d | Michael Hanselmann | except Exception, err: |
218 | 85f03e0d | Michael Hanselmann | queue.acquire() |
219 | 85f03e0d | Michael Hanselmann | try:
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220 | 85f03e0d | Michael Hanselmann | try:
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221 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
222 | 85f03e0d | Michael Hanselmann | op.result = str(err)
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223 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Error in %s", idx + 1, count, op) |
224 | 85f03e0d | Michael Hanselmann | finally:
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225 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
226 | 85f03e0d | Michael Hanselmann | finally:
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227 | 85f03e0d | Michael Hanselmann | queue.release() |
228 | 85f03e0d | Michael Hanselmann | raise
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229 | 85f03e0d | Michael Hanselmann | |
230 | 85f03e0d | Michael Hanselmann | except errors.GenericError, err:
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231 | 85f03e0d | Michael Hanselmann | logging.exception("Ganeti exception")
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232 | 85f03e0d | Michael Hanselmann | except:
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233 | 85f03e0d | Michael Hanselmann | logging.exception("Unhandled exception")
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234 | e2715f69 | Michael Hanselmann | finally:
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235 | 85f03e0d | Michael Hanselmann | queue.acquire() |
236 | 85f03e0d | Michael Hanselmann | try:
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237 | 85f03e0d | Michael Hanselmann | job_id = job.id |
238 | 85f03e0d | Michael Hanselmann | status = job.CalcStatus() |
239 | 85f03e0d | Michael Hanselmann | finally:
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240 | 85f03e0d | Michael Hanselmann | queue.release() |
241 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s finished job %s, status = %s",
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242 | 85f03e0d | Michael Hanselmann | self.worker_id, job_id, status)
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243 | e2715f69 | Michael Hanselmann | |
244 | e2715f69 | Michael Hanselmann | |
245 | e2715f69 | Michael Hanselmann | class _JobQueueWorkerPool(workerpool.WorkerPool): |
246 | 5bdce580 | Michael Hanselmann | def __init__(self, queue): |
247 | e2715f69 | Michael Hanselmann | super(_JobQueueWorkerPool, self).__init__(JOBQUEUE_THREADS, |
248 | e2715f69 | Michael Hanselmann | _JobQueueWorker) |
249 | 5bdce580 | Michael Hanselmann | self.queue = queue
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250 | e2715f69 | Michael Hanselmann | |
251 | e2715f69 | Michael Hanselmann | |
252 | 85f03e0d | Michael Hanselmann | class JobQueue(object): |
253 | bac5ffc3 | Oleksiy Mishchenko | _RE_JOB_FILE = re.compile(r"^job-(%s)$" % constants.JOB_ID_TEMPLATE)
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254 | f1da30e6 | Michael Hanselmann | |
255 | db37da70 | Michael Hanselmann | def _RequireOpenQueue(fn): |
256 | db37da70 | Michael Hanselmann | """Decorator for "public" functions.
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257 | db37da70 | Michael Hanselmann |
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258 | db37da70 | Michael Hanselmann | This function should be used for all "public" functions. That is, functions
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259 | db37da70 | Michael Hanselmann | usually called from other classes.
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260 | db37da70 | Michael Hanselmann |
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261 | db37da70 | Michael Hanselmann | Important: Use this decorator only after utils.LockedMethod!
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262 | db37da70 | Michael Hanselmann |
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263 | db37da70 | Michael Hanselmann | Example:
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264 | db37da70 | Michael Hanselmann | @utils.LockedMethod
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265 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
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266 | db37da70 | Michael Hanselmann | def Example(self):
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267 | db37da70 | Michael Hanselmann | pass
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268 | db37da70 | Michael Hanselmann |
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269 | db37da70 | Michael Hanselmann | """
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270 | db37da70 | Michael Hanselmann | def wrapper(self, *args, **kwargs): |
271 | 04ab05ce | Michael Hanselmann | assert self._queue_lock is not None, "Queue should be open" |
272 | db37da70 | Michael Hanselmann | return fn(self, *args, **kwargs) |
273 | db37da70 | Michael Hanselmann | return wrapper
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274 | db37da70 | Michael Hanselmann | |
275 | 85f03e0d | Michael Hanselmann | def __init__(self, context): |
276 | 5bdce580 | Michael Hanselmann | self.context = context
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277 | ac0930b9 | Iustin Pop | self._memcache = {}
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278 | c3f0a12f | Iustin Pop | self._my_hostname = utils.HostInfo().name
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279 | f1da30e6 | Michael Hanselmann | |
280 | 85f03e0d | Michael Hanselmann | # Locking
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281 | 85f03e0d | Michael Hanselmann | self._lock = threading.Lock()
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282 | 85f03e0d | Michael Hanselmann | self.acquire = self._lock.acquire |
283 | 85f03e0d | Michael Hanselmann | self.release = self._lock.release |
284 | 85f03e0d | Michael Hanselmann | |
285 | 04ab05ce | Michael Hanselmann | # Initialize
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286 | 5d6fb8eb | Michael Hanselmann | self._queue_lock = jstore.InitAndVerifyQueue(must_lock=True) |
287 | f1da30e6 | Michael Hanselmann | |
288 | 04ab05ce | Michael Hanselmann | # Read serial file
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289 | 04ab05ce | Michael Hanselmann | self._last_serial = jstore.ReadSerial()
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290 | 04ab05ce | Michael Hanselmann | assert self._last_serial is not None, ("Serial file was modified between" |
291 | 04ab05ce | Michael Hanselmann | " check in jstore and here")
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292 | c4beba1c | Iustin Pop | |
293 | 23752136 | Michael Hanselmann | # Get initial list of nodes
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294 | 8e00939c | Michael Hanselmann | self._nodes = set(self.context.cfg.GetNodeList()) |
295 | 8e00939c | Michael Hanselmann | |
296 | 8e00939c | Michael Hanselmann | # Remove master node
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297 | 8e00939c | Michael Hanselmann | try:
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298 | 8e00939c | Michael Hanselmann | self._nodes.remove(self._my_hostname) |
299 | 8e00939c | Michael Hanselmann | except ValueError: |
300 | 8e00939c | Michael Hanselmann | pass
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301 | 23752136 | Michael Hanselmann | |
302 | 23752136 | Michael Hanselmann | # TODO: Check consistency across nodes
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303 | 23752136 | Michael Hanselmann | |
304 | 85f03e0d | Michael Hanselmann | # Setup worker pool
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305 | 5bdce580 | Michael Hanselmann | self._wpool = _JobQueueWorkerPool(self) |
306 | 85f03e0d | Michael Hanselmann | |
307 | 85f03e0d | Michael Hanselmann | # We need to lock here because WorkerPool.AddTask() may start a job while
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308 | 85f03e0d | Michael Hanselmann | # we're still doing our work.
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309 | 85f03e0d | Michael Hanselmann | self.acquire()
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310 | 85f03e0d | Michael Hanselmann | try:
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311 | 85f03e0d | Michael Hanselmann | for job in self._GetJobsUnlocked(None): |
312 | 85f03e0d | Michael Hanselmann | status = job.CalcStatus() |
313 | 85f03e0d | Michael Hanselmann | |
314 | 85f03e0d | Michael Hanselmann | if status in (constants.JOB_STATUS_QUEUED, ): |
315 | 85f03e0d | Michael Hanselmann | self._wpool.AddTask(job)
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316 | 85f03e0d | Michael Hanselmann | |
317 | 85f03e0d | Michael Hanselmann | elif status in (constants.JOB_STATUS_RUNNING, ): |
318 | 85f03e0d | Michael Hanselmann | logging.warning("Unfinished job %s found: %s", job.id, job)
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319 | 85f03e0d | Michael Hanselmann | try:
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320 | 85f03e0d | Michael Hanselmann | for op in job.ops: |
321 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
322 | 85f03e0d | Michael Hanselmann | op.result = "Unclean master daemon shutdown"
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323 | 85f03e0d | Michael Hanselmann | finally:
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324 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
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325 | 85f03e0d | Michael Hanselmann | finally:
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326 | 85f03e0d | Michael Hanselmann | self.release()
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327 | 85f03e0d | Michael Hanselmann | |
328 | d2e03a33 | Michael Hanselmann | @utils.LockedMethod
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329 | d2e03a33 | Michael Hanselmann | @_RequireOpenQueue
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330 | d2e03a33 | Michael Hanselmann | def AddNode(self, node_name): |
331 | d2e03a33 | Michael Hanselmann | assert node_name != self._my_hostname |
332 | 23752136 | Michael Hanselmann | |
333 | 9f774ee8 | Michael Hanselmann | # Clean queue directory on added node
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334 | 9f774ee8 | Michael Hanselmann | rpc.call_jobqueue_purge(node_name) |
335 | 23752136 | Michael Hanselmann | |
336 | d2e03a33 | Michael Hanselmann | # Upload the whole queue excluding archived jobs
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337 | d2e03a33 | Michael Hanselmann | files = [self._GetJobPath(job_id) for job_id in self._GetJobIDsUnlocked()] |
338 | 23752136 | Michael Hanselmann | |
339 | d2e03a33 | Michael Hanselmann | # Upload current serial file
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340 | d2e03a33 | Michael Hanselmann | files.append(constants.JOB_QUEUE_SERIAL_FILE) |
341 | d2e03a33 | Michael Hanselmann | |
342 | d2e03a33 | Michael Hanselmann | for file_name in files: |
343 | 9f774ee8 | Michael Hanselmann | # Read file content
|
344 | 9f774ee8 | Michael Hanselmann | fd = open(file_name, "r") |
345 | 9f774ee8 | Michael Hanselmann | try:
|
346 | 9f774ee8 | Michael Hanselmann | content = fd.read() |
347 | 9f774ee8 | Michael Hanselmann | finally:
|
348 | 9f774ee8 | Michael Hanselmann | fd.close() |
349 | 9f774ee8 | Michael Hanselmann | |
350 | 9f774ee8 | Michael Hanselmann | result = rpc.call_jobqueue_update([node_name], file_name, content) |
351 | d2e03a33 | Michael Hanselmann | if not result[node_name]: |
352 | d2e03a33 | Michael Hanselmann | logging.error("Failed to upload %s to %s", file_name, node_name)
|
353 | d2e03a33 | Michael Hanselmann | |
354 | d2e03a33 | Michael Hanselmann | self._nodes.add(node_name)
|
355 | d2e03a33 | Michael Hanselmann | |
356 | d2e03a33 | Michael Hanselmann | @utils.LockedMethod
|
357 | d2e03a33 | Michael Hanselmann | @_RequireOpenQueue
|
358 | d2e03a33 | Michael Hanselmann | def RemoveNode(self, node_name): |
359 | 23752136 | Michael Hanselmann | try:
|
360 | d2e03a33 | Michael Hanselmann | # The queue is removed by the "leave node" RPC call.
|
361 | d2e03a33 | Michael Hanselmann | self._nodes.remove(node_name)
|
362 | d2e03a33 | Michael Hanselmann | except KeyError: |
363 | 23752136 | Michael Hanselmann | pass
|
364 | 23752136 | Michael Hanselmann | |
365 | 8e00939c | Michael Hanselmann | def _WriteAndReplicateFileUnlocked(self, file_name, data): |
366 | 8e00939c | Michael Hanselmann | """Writes a file locally and then replicates it to all nodes.
|
367 | 8e00939c | Michael Hanselmann |
|
368 | 8e00939c | Michael Hanselmann | """
|
369 | 8e00939c | Michael Hanselmann | utils.WriteFile(file_name, data=data) |
370 | 8e00939c | Michael Hanselmann | |
371 | 23752136 | Michael Hanselmann | failed_nodes = 0
|
372 | 9f774ee8 | Michael Hanselmann | result = rpc.call_jobqueue_update(self._nodes, file_name, data)
|
373 | 8e00939c | Michael Hanselmann | for node in self._nodes: |
374 | 23752136 | Michael Hanselmann | if not result[node]: |
375 | 23752136 | Michael Hanselmann | failed_nodes += 1
|
376 | 23752136 | Michael Hanselmann | logging.error("Copy of job queue file to node %s failed", node)
|
377 | 23752136 | Michael Hanselmann | |
378 | 23752136 | Michael Hanselmann | # TODO: check failed_nodes
|
379 | 23752136 | Michael Hanselmann | |
380 | 85f03e0d | Michael Hanselmann | def _FormatJobID(self, job_id): |
381 | 85f03e0d | Michael Hanselmann | if not isinstance(job_id, (int, long)): |
382 | 85f03e0d | Michael Hanselmann | raise errors.ProgrammerError("Job ID '%s' not numeric" % job_id) |
383 | 85f03e0d | Michael Hanselmann | if job_id < 0: |
384 | 85f03e0d | Michael Hanselmann | raise errors.ProgrammerError("Job ID %s is negative" % job_id) |
385 | 85f03e0d | Michael Hanselmann | |
386 | 85f03e0d | Michael Hanselmann | return str(job_id) |
387 | 85f03e0d | Michael Hanselmann | |
388 | 4c848b18 | Michael Hanselmann | def _NewSerialUnlocked(self): |
389 | f1da30e6 | Michael Hanselmann | """Generates a new job identifier.
|
390 | f1da30e6 | Michael Hanselmann |
|
391 | f1da30e6 | Michael Hanselmann | Job identifiers are unique during the lifetime of a cluster.
|
392 | f1da30e6 | Michael Hanselmann |
|
393 | f1da30e6 | Michael Hanselmann | Returns: A string representing the job identifier.
|
394 | f1da30e6 | Michael Hanselmann |
|
395 | f1da30e6 | Michael Hanselmann | """
|
396 | f1da30e6 | Michael Hanselmann | # New number
|
397 | f1da30e6 | Michael Hanselmann | serial = self._last_serial + 1 |
398 | f1da30e6 | Michael Hanselmann | |
399 | f1da30e6 | Michael Hanselmann | # Write to file
|
400 | 23752136 | Michael Hanselmann | self._WriteAndReplicateFileUnlocked(constants.JOB_QUEUE_SERIAL_FILE,
|
401 | 23752136 | Michael Hanselmann | "%s\n" % serial)
|
402 | f1da30e6 | Michael Hanselmann | |
403 | f1da30e6 | Michael Hanselmann | # Keep it only if we were able to write the file
|
404 | f1da30e6 | Michael Hanselmann | self._last_serial = serial
|
405 | f1da30e6 | Michael Hanselmann | |
406 | 85f03e0d | Michael Hanselmann | return self._FormatJobID(serial) |
407 | f1da30e6 | Michael Hanselmann | |
408 | 85f03e0d | Michael Hanselmann | @staticmethod
|
409 | 85f03e0d | Michael Hanselmann | def _GetJobPath(job_id): |
410 | f1da30e6 | Michael Hanselmann | return os.path.join(constants.QUEUE_DIR, "job-%s" % job_id) |
411 | f1da30e6 | Michael Hanselmann | |
412 | 85f03e0d | Michael Hanselmann | @staticmethod
|
413 | 85f03e0d | Michael Hanselmann | def _GetArchivedJobPath(job_id): |
414 | 0cb94105 | Michael Hanselmann | return os.path.join(constants.JOB_QUEUE_ARCHIVE_DIR, "job-%s" % job_id) |
415 | 0cb94105 | Michael Hanselmann | |
416 | 85f03e0d | Michael Hanselmann | @classmethod
|
417 | 85f03e0d | Michael Hanselmann | def _ExtractJobID(cls, name): |
418 | 85f03e0d | Michael Hanselmann | m = cls._RE_JOB_FILE.match(name) |
419 | fae737ac | Michael Hanselmann | if m:
|
420 | fae737ac | Michael Hanselmann | return m.group(1) |
421 | fae737ac | Michael Hanselmann | else:
|
422 | fae737ac | Michael Hanselmann | return None |
423 | fae737ac | Michael Hanselmann | |
424 | 911a495b | Iustin Pop | def _GetJobIDsUnlocked(self, archived=False): |
425 | 911a495b | Iustin Pop | """Return all known job IDs.
|
426 | 911a495b | Iustin Pop |
|
427 | 911a495b | Iustin Pop | If the parameter archived is True, archived jobs IDs will be
|
428 | 911a495b | Iustin Pop | included. Currently this argument is unused.
|
429 | 911a495b | Iustin Pop |
|
430 | ac0930b9 | Iustin Pop | The method only looks at disk because it's a requirement that all
|
431 | ac0930b9 | Iustin Pop | jobs are present on disk (so in the _memcache we don't have any
|
432 | ac0930b9 | Iustin Pop | extra IDs).
|
433 | ac0930b9 | Iustin Pop |
|
434 | 911a495b | Iustin Pop | """
|
435 | fae737ac | Michael Hanselmann | jlist = [self._ExtractJobID(name) for name in self._ListJobFiles()] |
436 | f0d874fe | Iustin Pop | jlist.sort() |
437 | f0d874fe | Iustin Pop | return jlist
|
438 | 911a495b | Iustin Pop | |
439 | f1da30e6 | Michael Hanselmann | def _ListJobFiles(self): |
440 | f1da30e6 | Michael Hanselmann | return [name for name in utils.ListVisibleFiles(constants.QUEUE_DIR) |
441 | f1da30e6 | Michael Hanselmann | if self._RE_JOB_FILE.match(name)] |
442 | f1da30e6 | Michael Hanselmann | |
443 | 911a495b | Iustin Pop | def _LoadJobUnlocked(self, job_id): |
444 | ac0930b9 | Iustin Pop | if job_id in self._memcache: |
445 | 205d71fd | Michael Hanselmann | logging.debug("Found job %s in memcache", job_id)
|
446 | ac0930b9 | Iustin Pop | return self._memcache[job_id] |
447 | ac0930b9 | Iustin Pop | |
448 | 911a495b | Iustin Pop | filepath = self._GetJobPath(job_id)
|
449 | f1da30e6 | Michael Hanselmann | logging.debug("Loading job from %s", filepath)
|
450 | f1da30e6 | Michael Hanselmann | try:
|
451 | f1da30e6 | Michael Hanselmann | fd = open(filepath, "r") |
452 | f1da30e6 | Michael Hanselmann | except IOError, err: |
453 | f1da30e6 | Michael Hanselmann | if err.errno in (errno.ENOENT, ): |
454 | f1da30e6 | Michael Hanselmann | return None |
455 | f1da30e6 | Michael Hanselmann | raise
|
456 | f1da30e6 | Michael Hanselmann | try:
|
457 | f1da30e6 | Michael Hanselmann | data = serializer.LoadJson(fd.read()) |
458 | f1da30e6 | Michael Hanselmann | finally:
|
459 | f1da30e6 | Michael Hanselmann | fd.close() |
460 | f1da30e6 | Michael Hanselmann | |
461 | ac0930b9 | Iustin Pop | job = _QueuedJob.Restore(self, data)
|
462 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
463 | 205d71fd | Michael Hanselmann | logging.debug("Added job %s to the cache", job_id)
|
464 | ac0930b9 | Iustin Pop | return job
|
465 | f1da30e6 | Michael Hanselmann | |
466 | f1da30e6 | Michael Hanselmann | def _GetJobsUnlocked(self, job_ids): |
467 | 911a495b | Iustin Pop | if not job_ids: |
468 | 911a495b | Iustin Pop | job_ids = self._GetJobIDsUnlocked()
|
469 | f1da30e6 | Michael Hanselmann | |
470 | 911a495b | Iustin Pop | return [self._LoadJobUnlocked(job_id) for job_id in job_ids] |
471 | f1da30e6 | Michael Hanselmann | |
472 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
473 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
474 | 4c848b18 | Michael Hanselmann | def SubmitJob(self, ops): |
475 | 85f03e0d | Michael Hanselmann | """Create and store a new job.
|
476 | f1da30e6 | Michael Hanselmann |
|
477 | 85f03e0d | Michael Hanselmann | This enters the job into our job queue and also puts it on the new
|
478 | 85f03e0d | Michael Hanselmann | queue, in order for it to be picked up by the queue processors.
|
479 | c3f0a12f | Iustin Pop |
|
480 | c3f0a12f | Iustin Pop | @type ops: list
|
481 | 205d71fd | Michael Hanselmann | @param ops: The list of OpCodes that will become the new job.
|
482 | c3f0a12f | Iustin Pop |
|
483 | c3f0a12f | Iustin Pop | """
|
484 | f1da30e6 | Michael Hanselmann | # Get job identifier
|
485 | 4c848b18 | Michael Hanselmann | job_id = self._NewSerialUnlocked()
|
486 | f1da30e6 | Michael Hanselmann | job = _QueuedJob(self, job_id, ops)
|
487 | f1da30e6 | Michael Hanselmann | |
488 | f1da30e6 | Michael Hanselmann | # Write to disk
|
489 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
490 | f1da30e6 | Michael Hanselmann | |
491 | 205d71fd | Michael Hanselmann | logging.debug("Added new job %s to the cache", job_id)
|
492 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
493 | ac0930b9 | Iustin Pop | |
494 | 85f03e0d | Michael Hanselmann | # Add to worker pool
|
495 | 85f03e0d | Michael Hanselmann | self._wpool.AddTask(job)
|
496 | 85f03e0d | Michael Hanselmann | |
497 | 85f03e0d | Michael Hanselmann | return job.id
|
498 | f1da30e6 | Michael Hanselmann | |
499 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
500 | 85f03e0d | Michael Hanselmann | def UpdateJobUnlocked(self, job): |
501 | f1da30e6 | Michael Hanselmann | filename = self._GetJobPath(job.id)
|
502 | 23752136 | Michael Hanselmann | data = serializer.DumpJson(job.Serialize(), indent=False)
|
503 | f1da30e6 | Michael Hanselmann | logging.debug("Writing job %s to %s", job.id, filename)
|
504 | 23752136 | Michael Hanselmann | self._WriteAndReplicateFileUnlocked(filename, data)
|
505 | 57f8615f | Michael Hanselmann | self._CleanCacheUnlocked([job.id])
|
506 | ac0930b9 | Iustin Pop | |
507 | 57f8615f | Michael Hanselmann | def _CleanCacheUnlocked(self, exclude): |
508 | ac0930b9 | Iustin Pop | """Clean the memory cache.
|
509 | ac0930b9 | Iustin Pop |
|
510 | ac0930b9 | Iustin Pop | The exceptions argument contains job IDs that should not be
|
511 | ac0930b9 | Iustin Pop | cleaned.
|
512 | ac0930b9 | Iustin Pop |
|
513 | ac0930b9 | Iustin Pop | """
|
514 | 57f8615f | Michael Hanselmann | assert isinstance(exclude, list) |
515 | 85f03e0d | Michael Hanselmann | |
516 | ac0930b9 | Iustin Pop | for job in self._memcache.values(): |
517 | 57f8615f | Michael Hanselmann | if job.id in exclude: |
518 | ac0930b9 | Iustin Pop | continue
|
519 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_QUEUED, |
520 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_RUNNING): |
521 | 205d71fd | Michael Hanselmann | logging.debug("Cleaning job %s from the cache", job.id)
|
522 | ac0930b9 | Iustin Pop | try:
|
523 | ac0930b9 | Iustin Pop | del self._memcache[job.id] |
524 | ac0930b9 | Iustin Pop | except KeyError: |
525 | ac0930b9 | Iustin Pop | pass
|
526 | f1da30e6 | Michael Hanselmann | |
527 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
528 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
529 | 188c5e0a | Michael Hanselmann | def CancelJob(self, job_id): |
530 | 188c5e0a | Michael Hanselmann | """Cancels a job.
|
531 | 188c5e0a | Michael Hanselmann |
|
532 | 188c5e0a | Michael Hanselmann | @type job_id: string
|
533 | 188c5e0a | Michael Hanselmann | @param job_id: Job ID of job to be cancelled.
|
534 | 188c5e0a | Michael Hanselmann |
|
535 | 188c5e0a | Michael Hanselmann | """
|
536 | 188c5e0a | Michael Hanselmann | logging.debug("Cancelling job %s", job_id)
|
537 | 188c5e0a | Michael Hanselmann | |
538 | 85f03e0d | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
539 | 188c5e0a | Michael Hanselmann | if not job: |
540 | 188c5e0a | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
541 | 188c5e0a | Michael Hanselmann | return
|
542 | 188c5e0a | Michael Hanselmann | |
543 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_QUEUED,): |
544 | 188c5e0a | Michael Hanselmann | logging.debug("Job %s is no longer in the queue", job.id)
|
545 | 188c5e0a | Michael Hanselmann | return
|
546 | 188c5e0a | Michael Hanselmann | |
547 | 85f03e0d | Michael Hanselmann | try:
|
548 | 85f03e0d | Michael Hanselmann | for op in job.ops: |
549 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
550 | 85f03e0d | Michael Hanselmann | op.result = "Job cancelled by request"
|
551 | 85f03e0d | Michael Hanselmann | finally:
|
552 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
553 | 188c5e0a | Michael Hanselmann | |
554 | c609f802 | Michael Hanselmann | @utils.LockedMethod
|
555 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
556 | f1da30e6 | Michael Hanselmann | def ArchiveJob(self, job_id): |
557 | c609f802 | Michael Hanselmann | """Archives a job.
|
558 | c609f802 | Michael Hanselmann |
|
559 | c609f802 | Michael Hanselmann | @type job_id: string
|
560 | c609f802 | Michael Hanselmann | @param job_id: Job ID of job to be archived.
|
561 | c609f802 | Michael Hanselmann |
|
562 | c609f802 | Michael Hanselmann | """
|
563 | c609f802 | Michael Hanselmann | logging.debug("Archiving job %s", job_id)
|
564 | c609f802 | Michael Hanselmann | |
565 | c609f802 | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
566 | c609f802 | Michael Hanselmann | if not job: |
567 | c609f802 | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
568 | c609f802 | Michael Hanselmann | return
|
569 | c609f802 | Michael Hanselmann | |
570 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_CANCELED, |
571 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_SUCCESS, |
572 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_ERROR): |
573 | 85f03e0d | Michael Hanselmann | logging.debug("Job %s is not yet done", job.id)
|
574 | c609f802 | Michael Hanselmann | return
|
575 | c609f802 | Michael Hanselmann | |
576 | c609f802 | Michael Hanselmann | try:
|
577 | c609f802 | Michael Hanselmann | old = self._GetJobPath(job.id)
|
578 | c609f802 | Michael Hanselmann | new = self._GetArchivedJobPath(job.id)
|
579 | c609f802 | Michael Hanselmann | |
580 | c609f802 | Michael Hanselmann | os.rename(old, new) |
581 | c609f802 | Michael Hanselmann | |
582 | c609f802 | Michael Hanselmann | logging.debug("Successfully archived job %s", job.id)
|
583 | c609f802 | Michael Hanselmann | finally:
|
584 | c609f802 | Michael Hanselmann | # Cleaning the cache because we don't know what os.rename actually did
|
585 | c609f802 | Michael Hanselmann | # and to be on the safe side.
|
586 | c609f802 | Michael Hanselmann | self._CleanCacheUnlocked([])
|
587 | f1da30e6 | Michael Hanselmann | |
588 | 85f03e0d | Michael Hanselmann | def _GetJobInfoUnlocked(self, job, fields): |
589 | e2715f69 | Michael Hanselmann | row = [] |
590 | e2715f69 | Michael Hanselmann | for fname in fields: |
591 | e2715f69 | Michael Hanselmann | if fname == "id": |
592 | e2715f69 | Michael Hanselmann | row.append(job.id) |
593 | e2715f69 | Michael Hanselmann | elif fname == "status": |
594 | 85f03e0d | Michael Hanselmann | row.append(job.CalcStatus()) |
595 | af30b2fd | Michael Hanselmann | elif fname == "ops": |
596 | 85f03e0d | Michael Hanselmann | row.append([op.input.__getstate__() for op in job.ops]) |
597 | af30b2fd | Michael Hanselmann | elif fname == "opresult": |
598 | 85f03e0d | Michael Hanselmann | row.append([op.result for op in job.ops]) |
599 | af30b2fd | Michael Hanselmann | elif fname == "opstatus": |
600 | 85f03e0d | Michael Hanselmann | row.append([op.status for op in job.ops]) |
601 | f1048938 | Iustin Pop | elif fname == "ticker": |
602 | 85f03e0d | Michael Hanselmann | ji = job.run_op_index |
603 | f1048938 | Iustin Pop | if ji < 0: |
604 | f1048938 | Iustin Pop | lmsg = None
|
605 | f1048938 | Iustin Pop | else:
|
606 | 85f03e0d | Michael Hanselmann | lmsg = job.ops[ji].RetrieveLog(-1)
|
607 | f1048938 | Iustin Pop | # message might be empty here
|
608 | f1048938 | Iustin Pop | if lmsg:
|
609 | f1048938 | Iustin Pop | lmsg = lmsg[0]
|
610 | f1048938 | Iustin Pop | else:
|
611 | f1048938 | Iustin Pop | lmsg = None
|
612 | f1048938 | Iustin Pop | row.append(lmsg) |
613 | e2715f69 | Michael Hanselmann | else:
|
614 | e2715f69 | Michael Hanselmann | raise errors.OpExecError("Invalid job query field '%s'" % fname) |
615 | e2715f69 | Michael Hanselmann | return row
|
616 | e2715f69 | Michael Hanselmann | |
617 | 85f03e0d | Michael Hanselmann | @utils.LockedMethod
|
618 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
619 | e2715f69 | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
620 | e2715f69 | Michael Hanselmann | """Returns a list of jobs in queue.
|
621 | e2715f69 | Michael Hanselmann |
|
622 | e2715f69 | Michael Hanselmann | Args:
|
623 | e2715f69 | Michael Hanselmann | - job_ids: Sequence of job identifiers or None for all
|
624 | e2715f69 | Michael Hanselmann | - fields: Names of fields to return
|
625 | e2715f69 | Michael Hanselmann |
|
626 | e2715f69 | Michael Hanselmann | """
|
627 | 85f03e0d | Michael Hanselmann | jobs = [] |
628 | e2715f69 | Michael Hanselmann | |
629 | 85f03e0d | Michael Hanselmann | for job in self._GetJobsUnlocked(job_ids): |
630 | 85f03e0d | Michael Hanselmann | if job is None: |
631 | 85f03e0d | Michael Hanselmann | jobs.append(None)
|
632 | 85f03e0d | Michael Hanselmann | else:
|
633 | 85f03e0d | Michael Hanselmann | jobs.append(self._GetJobInfoUnlocked(job, fields))
|
634 | e2715f69 | Michael Hanselmann | |
635 | 85f03e0d | Michael Hanselmann | return jobs
|
636 | e2715f69 | Michael Hanselmann | |
637 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
638 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
639 | e2715f69 | Michael Hanselmann | def Shutdown(self): |
640 | e2715f69 | Michael Hanselmann | """Stops the job queue.
|
641 | e2715f69 | Michael Hanselmann |
|
642 | e2715f69 | Michael Hanselmann | """
|
643 | e2715f69 | Michael Hanselmann | self._wpool.TerminateWorkers()
|
644 | 85f03e0d | Michael Hanselmann | |
645 | 04ab05ce | Michael Hanselmann | self._queue_lock.Close()
|
646 | 04ab05ce | Michael Hanselmann | self._queue_lock = None |