root / lib / jqueue.py @ 04ab05ce
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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 | 04ab05ce | Michael Hanselmann | self._queue_lock = jstore.InitAndVerifyQueue(exclusive=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 | 85f03e0d | Michael Hanselmann | # Setup worker pool
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294 | 5bdce580 | Michael Hanselmann | self._wpool = _JobQueueWorkerPool(self) |
295 | 85f03e0d | Michael Hanselmann | |
296 | 85f03e0d | Michael Hanselmann | # We need to lock here because WorkerPool.AddTask() may start a job while
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297 | 85f03e0d | Michael Hanselmann | # we're still doing our work.
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298 | 85f03e0d | Michael Hanselmann | self.acquire()
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299 | 85f03e0d | Michael Hanselmann | try:
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300 | 85f03e0d | Michael Hanselmann | for job in self._GetJobsUnlocked(None): |
301 | 85f03e0d | Michael Hanselmann | status = job.CalcStatus() |
302 | 85f03e0d | Michael Hanselmann | |
303 | 85f03e0d | Michael Hanselmann | if status in (constants.JOB_STATUS_QUEUED, ): |
304 | 85f03e0d | Michael Hanselmann | self._wpool.AddTask(job)
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305 | 85f03e0d | Michael Hanselmann | |
306 | 85f03e0d | Michael Hanselmann | elif status in (constants.JOB_STATUS_RUNNING, ): |
307 | 85f03e0d | Michael Hanselmann | logging.warning("Unfinished job %s found: %s", job.id, job)
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308 | 85f03e0d | Michael Hanselmann | try:
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309 | 85f03e0d | Michael Hanselmann | for op in job.ops: |
310 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
311 | 85f03e0d | Michael Hanselmann | op.result = "Unclean master daemon shutdown"
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312 | 85f03e0d | Michael Hanselmann | finally:
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313 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
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314 | 85f03e0d | Michael Hanselmann | finally:
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315 | 85f03e0d | Michael Hanselmann | self.release()
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316 | 85f03e0d | Michael Hanselmann | |
317 | 85f03e0d | Michael Hanselmann | def _FormatJobID(self, job_id): |
318 | 85f03e0d | Michael Hanselmann | if not isinstance(job_id, (int, long)): |
319 | 85f03e0d | Michael Hanselmann | raise errors.ProgrammerError("Job ID '%s' not numeric" % job_id) |
320 | 85f03e0d | Michael Hanselmann | if job_id < 0: |
321 | 85f03e0d | Michael Hanselmann | raise errors.ProgrammerError("Job ID %s is negative" % job_id) |
322 | 85f03e0d | Michael Hanselmann | |
323 | 85f03e0d | Michael Hanselmann | return str(job_id) |
324 | 85f03e0d | Michael Hanselmann | |
325 | c3f0a12f | Iustin Pop | def _NewSerialUnlocked(self, nodes): |
326 | f1da30e6 | Michael Hanselmann | """Generates a new job identifier.
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327 | f1da30e6 | Michael Hanselmann |
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328 | f1da30e6 | Michael Hanselmann | Job identifiers are unique during the lifetime of a cluster.
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329 | f1da30e6 | Michael Hanselmann |
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330 | f1da30e6 | Michael Hanselmann | Returns: A string representing the job identifier.
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331 | f1da30e6 | Michael Hanselmann |
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332 | f1da30e6 | Michael Hanselmann | """
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333 | f1da30e6 | Michael Hanselmann | # New number
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334 | f1da30e6 | Michael Hanselmann | serial = self._last_serial + 1 |
335 | f1da30e6 | Michael Hanselmann | |
336 | f1da30e6 | Michael Hanselmann | # Write to file
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337 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_SERIAL_FILE, |
338 | f1da30e6 | Michael Hanselmann | data="%s\n" % serial)
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339 | f1da30e6 | Michael Hanselmann | |
340 | f1da30e6 | Michael Hanselmann | # Keep it only if we were able to write the file
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341 | f1da30e6 | Michael Hanselmann | self._last_serial = serial
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342 | f1da30e6 | Michael Hanselmann | |
343 | c3f0a12f | Iustin Pop | # Distribute the serial to the other nodes
|
344 | c3f0a12f | Iustin Pop | try:
|
345 | c3f0a12f | Iustin Pop | nodes.remove(self._my_hostname)
|
346 | c3f0a12f | Iustin Pop | except ValueError: |
347 | c3f0a12f | Iustin Pop | pass
|
348 | c3f0a12f | Iustin Pop | |
349 | c3f0a12f | Iustin Pop | result = rpc.call_upload_file(nodes, constants.JOB_QUEUE_SERIAL_FILE) |
350 | c3f0a12f | Iustin Pop | for node in nodes: |
351 | c3f0a12f | Iustin Pop | if not result[node]: |
352 | c3f0a12f | Iustin Pop | logging.error("copy of job queue file to node %s failed", node)
|
353 | c3f0a12f | Iustin Pop | |
354 | 85f03e0d | Michael Hanselmann | return self._FormatJobID(serial) |
355 | f1da30e6 | Michael Hanselmann | |
356 | 85f03e0d | Michael Hanselmann | @staticmethod
|
357 | 85f03e0d | Michael Hanselmann | def _GetJobPath(job_id): |
358 | f1da30e6 | Michael Hanselmann | return os.path.join(constants.QUEUE_DIR, "job-%s" % job_id) |
359 | f1da30e6 | Michael Hanselmann | |
360 | 85f03e0d | Michael Hanselmann | @staticmethod
|
361 | 85f03e0d | Michael Hanselmann | def _GetArchivedJobPath(job_id): |
362 | 0cb94105 | Michael Hanselmann | return os.path.join(constants.JOB_QUEUE_ARCHIVE_DIR, "job-%s" % job_id) |
363 | 0cb94105 | Michael Hanselmann | |
364 | 85f03e0d | Michael Hanselmann | @classmethod
|
365 | 85f03e0d | Michael Hanselmann | def _ExtractJobID(cls, name): |
366 | 85f03e0d | Michael Hanselmann | m = cls._RE_JOB_FILE.match(name) |
367 | fae737ac | Michael Hanselmann | if m:
|
368 | fae737ac | Michael Hanselmann | return m.group(1) |
369 | fae737ac | Michael Hanselmann | else:
|
370 | fae737ac | Michael Hanselmann | return None |
371 | fae737ac | Michael Hanselmann | |
372 | 911a495b | Iustin Pop | def _GetJobIDsUnlocked(self, archived=False): |
373 | 911a495b | Iustin Pop | """Return all known job IDs.
|
374 | 911a495b | Iustin Pop |
|
375 | 911a495b | Iustin Pop | If the parameter archived is True, archived jobs IDs will be
|
376 | 911a495b | Iustin Pop | included. Currently this argument is unused.
|
377 | 911a495b | Iustin Pop |
|
378 | ac0930b9 | Iustin Pop | The method only looks at disk because it's a requirement that all
|
379 | ac0930b9 | Iustin Pop | jobs are present on disk (so in the _memcache we don't have any
|
380 | ac0930b9 | Iustin Pop | extra IDs).
|
381 | ac0930b9 | Iustin Pop |
|
382 | 911a495b | Iustin Pop | """
|
383 | fae737ac | Michael Hanselmann | jlist = [self._ExtractJobID(name) for name in self._ListJobFiles()] |
384 | f0d874fe | Iustin Pop | jlist.sort() |
385 | f0d874fe | Iustin Pop | return jlist
|
386 | 911a495b | Iustin Pop | |
387 | f1da30e6 | Michael Hanselmann | def _ListJobFiles(self): |
388 | f1da30e6 | Michael Hanselmann | return [name for name in utils.ListVisibleFiles(constants.QUEUE_DIR) |
389 | f1da30e6 | Michael Hanselmann | if self._RE_JOB_FILE.match(name)] |
390 | f1da30e6 | Michael Hanselmann | |
391 | 911a495b | Iustin Pop | def _LoadJobUnlocked(self, job_id): |
392 | ac0930b9 | Iustin Pop | if job_id in self._memcache: |
393 | 205d71fd | Michael Hanselmann | logging.debug("Found job %s in memcache", job_id)
|
394 | ac0930b9 | Iustin Pop | return self._memcache[job_id] |
395 | ac0930b9 | Iustin Pop | |
396 | 911a495b | Iustin Pop | filepath = self._GetJobPath(job_id)
|
397 | f1da30e6 | Michael Hanselmann | logging.debug("Loading job from %s", filepath)
|
398 | f1da30e6 | Michael Hanselmann | try:
|
399 | f1da30e6 | Michael Hanselmann | fd = open(filepath, "r") |
400 | f1da30e6 | Michael Hanselmann | except IOError, err: |
401 | f1da30e6 | Michael Hanselmann | if err.errno in (errno.ENOENT, ): |
402 | f1da30e6 | Michael Hanselmann | return None |
403 | f1da30e6 | Michael Hanselmann | raise
|
404 | f1da30e6 | Michael Hanselmann | try:
|
405 | f1da30e6 | Michael Hanselmann | data = serializer.LoadJson(fd.read()) |
406 | f1da30e6 | Michael Hanselmann | finally:
|
407 | f1da30e6 | Michael Hanselmann | fd.close() |
408 | f1da30e6 | Michael Hanselmann | |
409 | ac0930b9 | Iustin Pop | job = _QueuedJob.Restore(self, data)
|
410 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
411 | 205d71fd | Michael Hanselmann | logging.debug("Added job %s to the cache", job_id)
|
412 | ac0930b9 | Iustin Pop | return job
|
413 | f1da30e6 | Michael Hanselmann | |
414 | f1da30e6 | Michael Hanselmann | def _GetJobsUnlocked(self, job_ids): |
415 | 911a495b | Iustin Pop | if not job_ids: |
416 | 911a495b | Iustin Pop | job_ids = self._GetJobIDsUnlocked()
|
417 | f1da30e6 | Michael Hanselmann | |
418 | 911a495b | Iustin Pop | return [self._LoadJobUnlocked(job_id) for job_id in job_ids] |
419 | f1da30e6 | Michael Hanselmann | |
420 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
421 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
422 | 85f03e0d | Michael Hanselmann | def SubmitJob(self, ops, nodes): |
423 | 85f03e0d | Michael Hanselmann | """Create and store a new job.
|
424 | f1da30e6 | Michael Hanselmann |
|
425 | 85f03e0d | Michael Hanselmann | This enters the job into our job queue and also puts it on the new
|
426 | 85f03e0d | Michael Hanselmann | queue, in order for it to be picked up by the queue processors.
|
427 | c3f0a12f | Iustin Pop |
|
428 | c3f0a12f | Iustin Pop | @type ops: list
|
429 | 205d71fd | Michael Hanselmann | @param ops: The list of OpCodes that will become the new job.
|
430 | c3f0a12f | Iustin Pop | @type nodes: list
|
431 | c3f0a12f | Iustin Pop | @param nodes: The list of nodes to which the new job serial will be
|
432 | c3f0a12f | Iustin Pop | distributed.
|
433 | c3f0a12f | Iustin Pop |
|
434 | c3f0a12f | Iustin Pop | """
|
435 | f1da30e6 | Michael Hanselmann | # Get job identifier
|
436 | c3f0a12f | Iustin Pop | job_id = self._NewSerialUnlocked(nodes)
|
437 | f1da30e6 | Michael Hanselmann | job = _QueuedJob(self, job_id, ops)
|
438 | f1da30e6 | Michael Hanselmann | |
439 | f1da30e6 | Michael Hanselmann | # Write to disk
|
440 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
441 | f1da30e6 | Michael Hanselmann | |
442 | 205d71fd | Michael Hanselmann | logging.debug("Added new job %s to the cache", job_id)
|
443 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
444 | ac0930b9 | Iustin Pop | |
445 | 85f03e0d | Michael Hanselmann | # Add to worker pool
|
446 | 85f03e0d | Michael Hanselmann | self._wpool.AddTask(job)
|
447 | 85f03e0d | Michael Hanselmann | |
448 | 85f03e0d | Michael Hanselmann | return job.id
|
449 | f1da30e6 | Michael Hanselmann | |
450 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
451 | 85f03e0d | Michael Hanselmann | def UpdateJobUnlocked(self, job): |
452 | f1da30e6 | Michael Hanselmann | filename = self._GetJobPath(job.id)
|
453 | f1da30e6 | Michael Hanselmann | logging.debug("Writing job %s to %s", job.id, filename)
|
454 | f1da30e6 | Michael Hanselmann | utils.WriteFile(filename, |
455 | f1da30e6 | Michael Hanselmann | data=serializer.DumpJson(job.Serialize(), indent=False))
|
456 | 57f8615f | Michael Hanselmann | self._CleanCacheUnlocked([job.id])
|
457 | ac0930b9 | Iustin Pop | |
458 | 57f8615f | Michael Hanselmann | def _CleanCacheUnlocked(self, exclude): |
459 | ac0930b9 | Iustin Pop | """Clean the memory cache.
|
460 | ac0930b9 | Iustin Pop |
|
461 | ac0930b9 | Iustin Pop | The exceptions argument contains job IDs that should not be
|
462 | ac0930b9 | Iustin Pop | cleaned.
|
463 | ac0930b9 | Iustin Pop |
|
464 | ac0930b9 | Iustin Pop | """
|
465 | 57f8615f | Michael Hanselmann | assert isinstance(exclude, list) |
466 | 85f03e0d | Michael Hanselmann | |
467 | ac0930b9 | Iustin Pop | for job in self._memcache.values(): |
468 | 57f8615f | Michael Hanselmann | if job.id in exclude: |
469 | ac0930b9 | Iustin Pop | continue
|
470 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_QUEUED, |
471 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_RUNNING): |
472 | 205d71fd | Michael Hanselmann | logging.debug("Cleaning job %s from the cache", job.id)
|
473 | ac0930b9 | Iustin Pop | try:
|
474 | ac0930b9 | Iustin Pop | del self._memcache[job.id] |
475 | ac0930b9 | Iustin Pop | except KeyError: |
476 | ac0930b9 | Iustin Pop | pass
|
477 | f1da30e6 | Michael Hanselmann | |
478 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
479 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
480 | 188c5e0a | Michael Hanselmann | def CancelJob(self, job_id): |
481 | 188c5e0a | Michael Hanselmann | """Cancels a job.
|
482 | 188c5e0a | Michael Hanselmann |
|
483 | 188c5e0a | Michael Hanselmann | @type job_id: string
|
484 | 188c5e0a | Michael Hanselmann | @param job_id: Job ID of job to be cancelled.
|
485 | 188c5e0a | Michael Hanselmann |
|
486 | 188c5e0a | Michael Hanselmann | """
|
487 | 188c5e0a | Michael Hanselmann | logging.debug("Cancelling job %s", job_id)
|
488 | 188c5e0a | Michael Hanselmann | |
489 | 85f03e0d | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
490 | 188c5e0a | Michael Hanselmann | if not job: |
491 | 188c5e0a | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
492 | 188c5e0a | Michael Hanselmann | return
|
493 | 188c5e0a | Michael Hanselmann | |
494 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_QUEUED,): |
495 | 188c5e0a | Michael Hanselmann | logging.debug("Job %s is no longer in the queue", job.id)
|
496 | 188c5e0a | Michael Hanselmann | return
|
497 | 188c5e0a | Michael Hanselmann | |
498 | 85f03e0d | Michael Hanselmann | try:
|
499 | 85f03e0d | Michael Hanselmann | for op in job.ops: |
500 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
501 | 85f03e0d | Michael Hanselmann | op.result = "Job cancelled by request"
|
502 | 85f03e0d | Michael Hanselmann | finally:
|
503 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
504 | 188c5e0a | Michael Hanselmann | |
505 | c609f802 | Michael Hanselmann | @utils.LockedMethod
|
506 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
507 | f1da30e6 | Michael Hanselmann | def ArchiveJob(self, job_id): |
508 | c609f802 | Michael Hanselmann | """Archives a job.
|
509 | c609f802 | Michael Hanselmann |
|
510 | c609f802 | Michael Hanselmann | @type job_id: string
|
511 | c609f802 | Michael Hanselmann | @param job_id: Job ID of job to be archived.
|
512 | c609f802 | Michael Hanselmann |
|
513 | c609f802 | Michael Hanselmann | """
|
514 | c609f802 | Michael Hanselmann | logging.debug("Archiving job %s", job_id)
|
515 | c609f802 | Michael Hanselmann | |
516 | c609f802 | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
517 | c609f802 | Michael Hanselmann | if not job: |
518 | c609f802 | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
519 | c609f802 | Michael Hanselmann | return
|
520 | c609f802 | Michael Hanselmann | |
521 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_CANCELED, |
522 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_SUCCESS, |
523 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_ERROR): |
524 | 85f03e0d | Michael Hanselmann | logging.debug("Job %s is not yet done", job.id)
|
525 | c609f802 | Michael Hanselmann | return
|
526 | c609f802 | Michael Hanselmann | |
527 | c609f802 | Michael Hanselmann | try:
|
528 | c609f802 | Michael Hanselmann | old = self._GetJobPath(job.id)
|
529 | c609f802 | Michael Hanselmann | new = self._GetArchivedJobPath(job.id)
|
530 | c609f802 | Michael Hanselmann | |
531 | c609f802 | Michael Hanselmann | os.rename(old, new) |
532 | c609f802 | Michael Hanselmann | |
533 | c609f802 | Michael Hanselmann | logging.debug("Successfully archived job %s", job.id)
|
534 | c609f802 | Michael Hanselmann | finally:
|
535 | c609f802 | Michael Hanselmann | # Cleaning the cache because we don't know what os.rename actually did
|
536 | c609f802 | Michael Hanselmann | # and to be on the safe side.
|
537 | c609f802 | Michael Hanselmann | self._CleanCacheUnlocked([])
|
538 | f1da30e6 | Michael Hanselmann | |
539 | 85f03e0d | Michael Hanselmann | def _GetJobInfoUnlocked(self, job, fields): |
540 | e2715f69 | Michael Hanselmann | row = [] |
541 | e2715f69 | Michael Hanselmann | for fname in fields: |
542 | e2715f69 | Michael Hanselmann | if fname == "id": |
543 | e2715f69 | Michael Hanselmann | row.append(job.id) |
544 | e2715f69 | Michael Hanselmann | elif fname == "status": |
545 | 85f03e0d | Michael Hanselmann | row.append(job.CalcStatus()) |
546 | af30b2fd | Michael Hanselmann | elif fname == "ops": |
547 | 85f03e0d | Michael Hanselmann | row.append([op.input.__getstate__() for op in job.ops]) |
548 | af30b2fd | Michael Hanselmann | elif fname == "opresult": |
549 | 85f03e0d | Michael Hanselmann | row.append([op.result for op in job.ops]) |
550 | af30b2fd | Michael Hanselmann | elif fname == "opstatus": |
551 | 85f03e0d | Michael Hanselmann | row.append([op.status for op in job.ops]) |
552 | f1048938 | Iustin Pop | elif fname == "ticker": |
553 | 85f03e0d | Michael Hanselmann | ji = job.run_op_index |
554 | f1048938 | Iustin Pop | if ji < 0: |
555 | f1048938 | Iustin Pop | lmsg = None
|
556 | f1048938 | Iustin Pop | else:
|
557 | 85f03e0d | Michael Hanselmann | lmsg = job.ops[ji].RetrieveLog(-1)
|
558 | f1048938 | Iustin Pop | # message might be empty here
|
559 | f1048938 | Iustin Pop | if lmsg:
|
560 | f1048938 | Iustin Pop | lmsg = lmsg[0]
|
561 | f1048938 | Iustin Pop | else:
|
562 | f1048938 | Iustin Pop | lmsg = None
|
563 | f1048938 | Iustin Pop | row.append(lmsg) |
564 | e2715f69 | Michael Hanselmann | else:
|
565 | e2715f69 | Michael Hanselmann | raise errors.OpExecError("Invalid job query field '%s'" % fname) |
566 | e2715f69 | Michael Hanselmann | return row
|
567 | e2715f69 | Michael Hanselmann | |
568 | 85f03e0d | Michael Hanselmann | @utils.LockedMethod
|
569 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
570 | e2715f69 | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
571 | e2715f69 | Michael Hanselmann | """Returns a list of jobs in queue.
|
572 | e2715f69 | Michael Hanselmann |
|
573 | e2715f69 | Michael Hanselmann | Args:
|
574 | e2715f69 | Michael Hanselmann | - job_ids: Sequence of job identifiers or None for all
|
575 | e2715f69 | Michael Hanselmann | - fields: Names of fields to return
|
576 | e2715f69 | Michael Hanselmann |
|
577 | e2715f69 | Michael Hanselmann | """
|
578 | 85f03e0d | Michael Hanselmann | jobs = [] |
579 | e2715f69 | Michael Hanselmann | |
580 | 85f03e0d | Michael Hanselmann | for job in self._GetJobsUnlocked(job_ids): |
581 | 85f03e0d | Michael Hanselmann | if job is None: |
582 | 85f03e0d | Michael Hanselmann | jobs.append(None)
|
583 | 85f03e0d | Michael Hanselmann | else:
|
584 | 85f03e0d | Michael Hanselmann | jobs.append(self._GetJobInfoUnlocked(job, fields))
|
585 | e2715f69 | Michael Hanselmann | |
586 | 85f03e0d | Michael Hanselmann | return jobs
|
587 | e2715f69 | Michael Hanselmann | |
588 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
589 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
590 | e2715f69 | Michael Hanselmann | def Shutdown(self): |
591 | e2715f69 | Michael Hanselmann | """Stops the job queue.
|
592 | e2715f69 | Michael Hanselmann |
|
593 | e2715f69 | Michael Hanselmann | """
|
594 | e2715f69 | Michael Hanselmann | self._wpool.TerminateWorkers()
|
595 | 85f03e0d | Michael Hanselmann | |
596 | 04ab05ce | Michael Hanselmann | self._queue_lock.Close()
|
597 | 04ab05ce | Michael Hanselmann | self._queue_lock = None |