root / lib / jqueue.py @ 64381ad7
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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 | c3f0a12f | Iustin Pop | from ganeti import rpc |
39 | e2715f69 | Michael Hanselmann | |
40 | e2715f69 | Michael Hanselmann | |
41 | e2715f69 | Michael Hanselmann | JOBQUEUE_THREADS = 5
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42 | e2715f69 | Michael Hanselmann | |
43 | 498ae1cc | Iustin Pop | |
44 | e2715f69 | Michael Hanselmann | class _QueuedOpCode(object): |
45 | e2715f69 | Michael Hanselmann | """Encasulates an opcode object.
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46 | e2715f69 | Michael Hanselmann |
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47 | 307149a8 | Iustin Pop | Access is synchronized by the '_lock' attribute.
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48 | e2715f69 | Michael Hanselmann |
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49 | f1048938 | Iustin Pop | The 'log' attribute holds the execution log and consists of tuples
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50 | f1048938 | Iustin Pop | of the form (timestamp, level, message).
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51 | f1048938 | Iustin Pop |
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52 | e2715f69 | Michael Hanselmann | """
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53 | 85f03e0d | Michael Hanselmann | def __new__(cls, *args, **kwargs): |
54 | 85f03e0d | Michael Hanselmann | obj = object.__new__(cls, *args, **kwargs)
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55 | 85f03e0d | Michael Hanselmann | # Create a special lock for logging
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56 | 85f03e0d | Michael Hanselmann | obj._log_lock = threading.Lock() |
57 | 85f03e0d | Michael Hanselmann | return obj
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58 | f1da30e6 | Michael Hanselmann | |
59 | 85f03e0d | Michael Hanselmann | def __init__(self, op): |
60 | 85f03e0d | Michael Hanselmann | self.input = op
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61 | 85f03e0d | Michael Hanselmann | self.status = constants.OP_STATUS_QUEUED
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62 | 85f03e0d | Michael Hanselmann | self.result = None |
63 | 85f03e0d | Michael Hanselmann | self.log = []
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64 | f1da30e6 | Michael Hanselmann | |
65 | f1da30e6 | Michael Hanselmann | @classmethod
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66 | f1da30e6 | Michael Hanselmann | def Restore(cls, state): |
67 | 85f03e0d | Michael Hanselmann | obj = _QueuedOpCode.__new__(cls) |
68 | 85f03e0d | Michael Hanselmann | obj.input = opcodes.OpCode.LoadOpCode(state["input"])
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69 | 85f03e0d | Michael Hanselmann | obj.status = state["status"]
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70 | 85f03e0d | Michael Hanselmann | obj.result = state["result"]
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71 | 85f03e0d | Michael Hanselmann | obj.log = state["log"]
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72 | f1da30e6 | Michael Hanselmann | return obj
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73 | f1da30e6 | Michael Hanselmann | |
74 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
75 | 85f03e0d | Michael Hanselmann | self._log_lock.acquire()
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76 | 85f03e0d | Michael Hanselmann | try:
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77 | 85f03e0d | Michael Hanselmann | return {
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78 | 85f03e0d | Michael Hanselmann | "input": self.input.__getstate__(), |
79 | 85f03e0d | Michael Hanselmann | "status": self.status, |
80 | 85f03e0d | Michael Hanselmann | "result": self.result, |
81 | 85f03e0d | Michael Hanselmann | "log": self.log, |
82 | 85f03e0d | Michael Hanselmann | } |
83 | 85f03e0d | Michael Hanselmann | finally:
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84 | 85f03e0d | Michael Hanselmann | self._log_lock.release()
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85 | e2715f69 | Michael Hanselmann | |
86 | f1048938 | Iustin Pop | def Log(self, *args): |
87 | f1048938 | Iustin Pop | """Append a log entry.
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88 | f1048938 | Iustin Pop |
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89 | f1048938 | Iustin Pop | """
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90 | 85f03e0d | Michael Hanselmann | assert len(args) < 3 |
91 | f1048938 | Iustin Pop | |
92 | f1048938 | Iustin Pop | if len(args) == 1: |
93 | f1048938 | Iustin Pop | log_type = constants.ELOG_MESSAGE |
94 | f1048938 | Iustin Pop | log_msg = args[0]
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95 | f1048938 | Iustin Pop | else:
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96 | f1048938 | Iustin Pop | log_type, log_msg = args |
97 | f1048938 | Iustin Pop | |
98 | 85f03e0d | Michael Hanselmann | self._log_lock.acquire()
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99 | 85f03e0d | Michael Hanselmann | try:
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100 | 85f03e0d | Michael Hanselmann | self.log.append((time.time(), log_type, log_msg))
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101 | 85f03e0d | Michael Hanselmann | finally:
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102 | 85f03e0d | Michael Hanselmann | self._log_lock.release()
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103 | 85f03e0d | Michael Hanselmann | |
104 | f1048938 | Iustin Pop | def RetrieveLog(self, start_at=0): |
105 | f1048938 | Iustin Pop | """Retrieve (a part of) the execution log.
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106 | f1048938 | Iustin Pop |
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107 | f1048938 | Iustin Pop | """
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108 | 85f03e0d | Michael Hanselmann | self._log_lock.acquire()
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109 | 85f03e0d | Michael Hanselmann | try:
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110 | 85f03e0d | Michael Hanselmann | return self.log[start_at:] |
111 | 85f03e0d | Michael Hanselmann | finally:
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112 | 85f03e0d | Michael Hanselmann | self._log_lock.release()
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113 | f1048938 | Iustin Pop | |
114 | e2715f69 | Michael Hanselmann | |
115 | e2715f69 | Michael Hanselmann | class _QueuedJob(object): |
116 | e2715f69 | Michael Hanselmann | """In-memory job representation.
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117 | e2715f69 | Michael Hanselmann |
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118 | e2715f69 | Michael Hanselmann | This is what we use to track the user-submitted jobs.
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119 | e2715f69 | Michael Hanselmann |
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120 | e2715f69 | Michael Hanselmann | """
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121 | 85f03e0d | Michael Hanselmann | def __init__(self, queue, job_id, ops): |
122 | e2715f69 | Michael Hanselmann | if not ops: |
123 | e2715f69 | Michael Hanselmann | # TODO
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124 | e2715f69 | Michael Hanselmann | raise Exception("No opcodes") |
125 | e2715f69 | Michael Hanselmann | |
126 | 85f03e0d | Michael Hanselmann | self.queue = queue
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127 | f1da30e6 | Michael Hanselmann | self.id = job_id
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128 | 85f03e0d | Michael Hanselmann | self.ops = [_QueuedOpCode(op) for op in ops] |
129 | 85f03e0d | Michael Hanselmann | self.run_op_index = -1 |
130 | f1da30e6 | Michael Hanselmann | |
131 | f1da30e6 | Michael Hanselmann | @classmethod
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132 | 85f03e0d | Michael Hanselmann | def Restore(cls, queue, state): |
133 | 85f03e0d | Michael Hanselmann | obj = _QueuedJob.__new__(cls) |
134 | 85f03e0d | Michael Hanselmann | obj.queue = queue |
135 | 85f03e0d | Michael Hanselmann | obj.id = state["id"]
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136 | 85f03e0d | Michael Hanselmann | obj.ops = [_QueuedOpCode.Restore(op_state) for op_state in state["ops"]] |
137 | 85f03e0d | Michael Hanselmann | obj.run_op_index = state["run_op_index"]
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138 | f1da30e6 | Michael Hanselmann | return obj
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139 | f1da30e6 | Michael Hanselmann | |
140 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
141 | f1da30e6 | Michael Hanselmann | return {
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142 | f1da30e6 | Michael Hanselmann | "id": self.id, |
143 | 85f03e0d | Michael Hanselmann | "ops": [op.Serialize() for op in self.ops], |
144 | f1048938 | Iustin Pop | "run_op_index": self.run_op_index, |
145 | f1da30e6 | Michael Hanselmann | } |
146 | f1da30e6 | Michael Hanselmann | |
147 | 85f03e0d | Michael Hanselmann | def CalcStatus(self): |
148 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_QUEUED |
149 | e2715f69 | Michael Hanselmann | |
150 | e2715f69 | Michael Hanselmann | all_success = True
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151 | 85f03e0d | Michael Hanselmann | for op in self.ops: |
152 | 85f03e0d | Michael Hanselmann | if op.status == constants.OP_STATUS_SUCCESS:
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153 | e2715f69 | Michael Hanselmann | continue
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154 | e2715f69 | Michael Hanselmann | |
155 | e2715f69 | Michael Hanselmann | all_success = False
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156 | e2715f69 | Michael Hanselmann | |
157 | 85f03e0d | Michael Hanselmann | if op.status == constants.OP_STATUS_QUEUED:
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158 | e2715f69 | Michael Hanselmann | pass
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159 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_RUNNING:
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160 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_RUNNING |
161 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_ERROR:
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162 | f1da30e6 | Michael Hanselmann | status = constants.JOB_STATUS_ERROR |
163 | f1da30e6 | Michael Hanselmann | # The whole job fails if one opcode failed
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164 | f1da30e6 | Michael Hanselmann | break
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165 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_CANCELED:
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166 | 4cb1d919 | Michael Hanselmann | status = constants.OP_STATUS_CANCELED |
167 | 4cb1d919 | Michael Hanselmann | break
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168 | e2715f69 | Michael Hanselmann | |
169 | e2715f69 | Michael Hanselmann | if all_success:
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170 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_SUCCESS |
171 | e2715f69 | Michael Hanselmann | |
172 | e2715f69 | Michael Hanselmann | return status
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173 | e2715f69 | Michael Hanselmann | |
174 | f1048938 | Iustin Pop | |
175 | 85f03e0d | Michael Hanselmann | class _JobQueueWorker(workerpool.BaseWorker): |
176 | 85f03e0d | Michael Hanselmann | def RunTask(self, job): |
177 | e2715f69 | Michael Hanselmann | """Job executor.
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178 | e2715f69 | Michael Hanselmann |
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179 | 85f03e0d | Michael Hanselmann | This functions processes a job.
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180 | e2715f69 | Michael Hanselmann |
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181 | e2715f69 | Michael Hanselmann | """
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182 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s processing job %s",
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183 | e2715f69 | Michael Hanselmann | self.worker_id, job.id)
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184 | f1048938 | Iustin Pop | proc = mcpu.Processor(self.pool.context)
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185 | 85f03e0d | Michael Hanselmann | queue = job.queue |
186 | e2715f69 | Michael Hanselmann | try:
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187 | 85f03e0d | Michael Hanselmann | try:
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188 | 85f03e0d | Michael Hanselmann | count = len(job.ops)
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189 | 85f03e0d | Michael Hanselmann | for idx, op in enumerate(job.ops): |
190 | 85f03e0d | Michael Hanselmann | try:
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191 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Starting %s", idx + 1, count, op) |
192 | 85f03e0d | Michael Hanselmann | |
193 | 85f03e0d | Michael Hanselmann | queue.acquire() |
194 | 85f03e0d | Michael Hanselmann | try:
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195 | 85f03e0d | Michael Hanselmann | job.run_op_index = idx |
196 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_RUNNING |
197 | 85f03e0d | Michael Hanselmann | op.result = None
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198 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
199 | 85f03e0d | Michael Hanselmann | |
200 | 38206f3c | Iustin Pop | input_opcode = op.input |
201 | 85f03e0d | Michael Hanselmann | finally:
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202 | 85f03e0d | Michael Hanselmann | queue.release() |
203 | 85f03e0d | Michael Hanselmann | |
204 | 38206f3c | Iustin Pop | result = proc.ExecOpCode(input_opcode, op.Log) |
205 | 85f03e0d | Michael Hanselmann | |
206 | 85f03e0d | Michael Hanselmann | queue.acquire() |
207 | 85f03e0d | Michael Hanselmann | try:
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208 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_SUCCESS |
209 | 85f03e0d | Michael Hanselmann | op.result = result |
210 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
211 | 85f03e0d | Michael Hanselmann | finally:
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212 | 85f03e0d | Michael Hanselmann | queue.release() |
213 | 85f03e0d | Michael Hanselmann | |
214 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Successfully finished %s",
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215 | 85f03e0d | Michael Hanselmann | idx + 1, count, op)
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216 | 85f03e0d | Michael Hanselmann | except Exception, err: |
217 | 85f03e0d | Michael Hanselmann | queue.acquire() |
218 | 85f03e0d | Michael Hanselmann | try:
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219 | 85f03e0d | Michael Hanselmann | try:
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220 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
221 | 85f03e0d | Michael Hanselmann | op.result = str(err)
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222 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Error in %s", idx + 1, count, op) |
223 | 85f03e0d | Michael Hanselmann | finally:
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224 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
225 | 85f03e0d | Michael Hanselmann | finally:
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226 | 85f03e0d | Michael Hanselmann | queue.release() |
227 | 85f03e0d | Michael Hanselmann | raise
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228 | 85f03e0d | Michael Hanselmann | |
229 | 85f03e0d | Michael Hanselmann | except errors.GenericError, err:
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230 | 85f03e0d | Michael Hanselmann | logging.exception("Ganeti exception")
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231 | 85f03e0d | Michael Hanselmann | except:
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232 | 85f03e0d | Michael Hanselmann | logging.exception("Unhandled exception")
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233 | e2715f69 | Michael Hanselmann | finally:
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234 | 85f03e0d | Michael Hanselmann | queue.acquire() |
235 | 85f03e0d | Michael Hanselmann | try:
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236 | 85f03e0d | Michael Hanselmann | job_id = job.id |
237 | 85f03e0d | Michael Hanselmann | status = job.CalcStatus() |
238 | 85f03e0d | Michael Hanselmann | finally:
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239 | 85f03e0d | Michael Hanselmann | queue.release() |
240 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s finished job %s, status = %s",
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241 | 85f03e0d | Michael Hanselmann | self.worker_id, job_id, status)
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242 | e2715f69 | Michael Hanselmann | |
243 | e2715f69 | Michael Hanselmann | |
244 | e2715f69 | Michael Hanselmann | class _JobQueueWorkerPool(workerpool.WorkerPool): |
245 | e2715f69 | Michael Hanselmann | def __init__(self, context): |
246 | e2715f69 | Michael Hanselmann | super(_JobQueueWorkerPool, self).__init__(JOBQUEUE_THREADS, |
247 | e2715f69 | Michael Hanselmann | _JobQueueWorker) |
248 | e2715f69 | Michael Hanselmann | self.context = context
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249 | e2715f69 | Michael Hanselmann | |
250 | e2715f69 | Michael Hanselmann | |
251 | 85f03e0d | Michael Hanselmann | class JobQueue(object): |
252 | bac5ffc3 | Oleksiy Mishchenko | _RE_JOB_FILE = re.compile(r"^job-(%s)$" % constants.JOB_ID_TEMPLATE)
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253 | f1da30e6 | Michael Hanselmann | |
254 | 85f03e0d | Michael Hanselmann | def __init__(self, context): |
255 | ac0930b9 | Iustin Pop | self._memcache = {}
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256 | c3f0a12f | Iustin Pop | self._my_hostname = utils.HostInfo().name
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257 | f1da30e6 | Michael Hanselmann | |
258 | 85f03e0d | Michael Hanselmann | # Locking
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259 | 85f03e0d | Michael Hanselmann | self._lock = threading.Lock()
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260 | 85f03e0d | Michael Hanselmann | self.acquire = self._lock.acquire |
261 | 85f03e0d | Michael Hanselmann | self.release = self._lock.release |
262 | 85f03e0d | Michael Hanselmann | |
263 | 0cb94105 | Michael Hanselmann | # Make sure our directories exists
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264 | 0cb94105 | Michael Hanselmann | for path in (constants.QUEUE_DIR, constants.JOB_QUEUE_ARCHIVE_DIR): |
265 | 0cb94105 | Michael Hanselmann | try:
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266 | 0cb94105 | Michael Hanselmann | os.mkdir(path, 0700)
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267 | 0cb94105 | Michael Hanselmann | except OSError, err: |
268 | 0cb94105 | Michael Hanselmann | if err.errno not in (errno.EEXIST, ): |
269 | 0cb94105 | Michael Hanselmann | raise
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270 | f1da30e6 | Michael Hanselmann | |
271 | f1da30e6 | Michael Hanselmann | # Get queue lock
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272 | f1da30e6 | Michael Hanselmann | self.lock_fd = open(constants.JOB_QUEUE_LOCK_FILE, "w") |
273 | f1da30e6 | Michael Hanselmann | try:
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274 | f1da30e6 | Michael Hanselmann | utils.LockFile(self.lock_fd)
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275 | f1da30e6 | Michael Hanselmann | except:
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276 | f1da30e6 | Michael Hanselmann | self.lock_fd.close()
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277 | f1da30e6 | Michael Hanselmann | raise
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278 | f1da30e6 | Michael Hanselmann | |
279 | f1da30e6 | Michael Hanselmann | # Read version
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280 | f1da30e6 | Michael Hanselmann | try:
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281 | f1da30e6 | Michael Hanselmann | version_fd = open(constants.JOB_QUEUE_VERSION_FILE, "r") |
282 | f1da30e6 | Michael Hanselmann | except IOError, err: |
283 | f1da30e6 | Michael Hanselmann | if err.errno not in (errno.ENOENT, ): |
284 | f1da30e6 | Michael Hanselmann | raise
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285 | f1da30e6 | Michael Hanselmann | |
286 | f1da30e6 | Michael Hanselmann | # Setup a new queue
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287 | f1da30e6 | Michael Hanselmann | self._InitQueueUnlocked()
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288 | f1da30e6 | Michael Hanselmann | |
289 | f1da30e6 | Michael Hanselmann | # Try to open again
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290 | f1da30e6 | Michael Hanselmann | version_fd = open(constants.JOB_QUEUE_VERSION_FILE, "r") |
291 | f1da30e6 | Michael Hanselmann | |
292 | f1da30e6 | Michael Hanselmann | try:
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293 | f1da30e6 | Michael Hanselmann | # Try to read version
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294 | f1da30e6 | Michael Hanselmann | version = int(version_fd.read(128)) |
295 | f1da30e6 | Michael Hanselmann | |
296 | f1da30e6 | Michael Hanselmann | # Verify version
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297 | f1da30e6 | Michael Hanselmann | if version != constants.JOB_QUEUE_VERSION:
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298 | f1da30e6 | Michael Hanselmann | raise errors.JobQueueError("Found version %s, expected %s", |
299 | f1da30e6 | Michael Hanselmann | version, constants.JOB_QUEUE_VERSION) |
300 | f1da30e6 | Michael Hanselmann | finally:
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301 | f1da30e6 | Michael Hanselmann | version_fd.close() |
302 | f1da30e6 | Michael Hanselmann | |
303 | c4beba1c | Iustin Pop | self._last_serial = self._ReadSerial() |
304 | c4beba1c | Iustin Pop | if self._last_serial is None: |
305 | c4beba1c | Iustin Pop | raise errors.ConfigurationError("Can't read/parse the job queue serial" |
306 | c4beba1c | Iustin Pop | " file")
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307 | c4beba1c | Iustin Pop | |
308 | 85f03e0d | Michael Hanselmann | # Setup worker pool
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309 | 85f03e0d | Michael Hanselmann | self._wpool = _JobQueueWorkerPool(context)
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310 | 85f03e0d | Michael Hanselmann | |
311 | 85f03e0d | Michael Hanselmann | # We need to lock here because WorkerPool.AddTask() may start a job while
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312 | 85f03e0d | Michael Hanselmann | # we're still doing our work.
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313 | 85f03e0d | Michael Hanselmann | self.acquire()
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314 | 85f03e0d | Michael Hanselmann | try:
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315 | 85f03e0d | Michael Hanselmann | for job in self._GetJobsUnlocked(None): |
316 | 85f03e0d | Michael Hanselmann | status = job.CalcStatus() |
317 | 85f03e0d | Michael Hanselmann | |
318 | 85f03e0d | Michael Hanselmann | if status in (constants.JOB_STATUS_QUEUED, ): |
319 | 85f03e0d | Michael Hanselmann | self._wpool.AddTask(job)
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320 | 85f03e0d | Michael Hanselmann | |
321 | 85f03e0d | Michael Hanselmann | elif status in (constants.JOB_STATUS_RUNNING, ): |
322 | 85f03e0d | Michael Hanselmann | logging.warning("Unfinished job %s found: %s", job.id, job)
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323 | 85f03e0d | Michael Hanselmann | try:
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324 | 85f03e0d | Michael Hanselmann | for op in job.ops: |
325 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
326 | 85f03e0d | Michael Hanselmann | op.result = "Unclean master daemon shutdown"
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327 | 85f03e0d | Michael Hanselmann | finally:
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328 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
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329 | 85f03e0d | Michael Hanselmann | finally:
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330 | 85f03e0d | Michael Hanselmann | self.release()
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331 | 85f03e0d | Michael Hanselmann | |
332 | c4beba1c | Iustin Pop | @staticmethod
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333 | c4beba1c | Iustin Pop | def _ReadSerial(): |
334 | c4beba1c | Iustin Pop | """Try to read the job serial file.
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335 | c4beba1c | Iustin Pop |
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336 | c4beba1c | Iustin Pop | @rtype: None or int
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337 | c4beba1c | Iustin Pop | @return: If the serial can be read, then it is returned. Otherwise None
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338 | c4beba1c | Iustin Pop | is returned.
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339 | c4beba1c | Iustin Pop |
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340 | c4beba1c | Iustin Pop | """
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341 | f1da30e6 | Michael Hanselmann | try:
|
342 | c4beba1c | Iustin Pop | serial_fd = open(constants.JOB_QUEUE_SERIAL_FILE, "r") |
343 | c4beba1c | Iustin Pop | try:
|
344 | c4beba1c | Iustin Pop | # Read last serial
|
345 | c4beba1c | Iustin Pop | serial = int(serial_fd.read(1024).strip()) |
346 | c4beba1c | Iustin Pop | finally:
|
347 | c4beba1c | Iustin Pop | serial_fd.close() |
348 | c4beba1c | Iustin Pop | except (ValueError, EnvironmentError): |
349 | c4beba1c | Iustin Pop | serial = None
|
350 | c4beba1c | Iustin Pop | |
351 | c4beba1c | Iustin Pop | return serial
|
352 | f1da30e6 | Michael Hanselmann | |
353 | f1da30e6 | Michael Hanselmann | def _InitQueueUnlocked(self): |
354 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
355 | f1da30e6 | Michael Hanselmann | |
356 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_VERSION_FILE, |
357 | f1da30e6 | Michael Hanselmann | data="%s\n" % constants.JOB_QUEUE_VERSION)
|
358 | c4beba1c | Iustin Pop | if self._ReadSerial() is None: |
359 | c4beba1c | Iustin Pop | utils.WriteFile(constants.JOB_QUEUE_SERIAL_FILE, |
360 | c4beba1c | Iustin Pop | data="%s\n" % 0) |
361 | f1da30e6 | Michael Hanselmann | |
362 | 85f03e0d | Michael Hanselmann | def _FormatJobID(self, job_id): |
363 | 85f03e0d | Michael Hanselmann | if not isinstance(job_id, (int, long)): |
364 | 85f03e0d | Michael Hanselmann | raise errors.ProgrammerError("Job ID '%s' not numeric" % job_id) |
365 | 85f03e0d | Michael Hanselmann | if job_id < 0: |
366 | 85f03e0d | Michael Hanselmann | raise errors.ProgrammerError("Job ID %s is negative" % job_id) |
367 | 85f03e0d | Michael Hanselmann | |
368 | 85f03e0d | Michael Hanselmann | return str(job_id) |
369 | 85f03e0d | Michael Hanselmann | |
370 | c3f0a12f | Iustin Pop | def _NewSerialUnlocked(self, nodes): |
371 | f1da30e6 | Michael Hanselmann | """Generates a new job identifier.
|
372 | f1da30e6 | Michael Hanselmann |
|
373 | f1da30e6 | Michael Hanselmann | Job identifiers are unique during the lifetime of a cluster.
|
374 | f1da30e6 | Michael Hanselmann |
|
375 | f1da30e6 | Michael Hanselmann | Returns: A string representing the job identifier.
|
376 | f1da30e6 | Michael Hanselmann |
|
377 | f1da30e6 | Michael Hanselmann | """
|
378 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
379 | f1da30e6 | Michael Hanselmann | |
380 | f1da30e6 | Michael Hanselmann | # New number
|
381 | f1da30e6 | Michael Hanselmann | serial = self._last_serial + 1 |
382 | f1da30e6 | Michael Hanselmann | |
383 | f1da30e6 | Michael Hanselmann | # Write to file
|
384 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_SERIAL_FILE, |
385 | f1da30e6 | Michael Hanselmann | data="%s\n" % serial)
|
386 | f1da30e6 | Michael Hanselmann | |
387 | f1da30e6 | Michael Hanselmann | # Keep it only if we were able to write the file
|
388 | f1da30e6 | Michael Hanselmann | self._last_serial = serial
|
389 | f1da30e6 | Michael Hanselmann | |
390 | c3f0a12f | Iustin Pop | # Distribute the serial to the other nodes
|
391 | c3f0a12f | Iustin Pop | try:
|
392 | c3f0a12f | Iustin Pop | nodes.remove(self._my_hostname)
|
393 | c3f0a12f | Iustin Pop | except ValueError: |
394 | c3f0a12f | Iustin Pop | pass
|
395 | c3f0a12f | Iustin Pop | |
396 | c3f0a12f | Iustin Pop | result = rpc.call_upload_file(nodes, constants.JOB_QUEUE_SERIAL_FILE) |
397 | c3f0a12f | Iustin Pop | for node in nodes: |
398 | c3f0a12f | Iustin Pop | if not result[node]: |
399 | c3f0a12f | Iustin Pop | logging.error("copy of job queue file to node %s failed", node)
|
400 | c3f0a12f | Iustin Pop | |
401 | 85f03e0d | Michael Hanselmann | return self._FormatJobID(serial) |
402 | f1da30e6 | Michael Hanselmann | |
403 | 85f03e0d | Michael Hanselmann | @staticmethod
|
404 | 85f03e0d | Michael Hanselmann | def _GetJobPath(job_id): |
405 | f1da30e6 | Michael Hanselmann | return os.path.join(constants.QUEUE_DIR, "job-%s" % job_id) |
406 | f1da30e6 | Michael Hanselmann | |
407 | 85f03e0d | Michael Hanselmann | @staticmethod
|
408 | 85f03e0d | Michael Hanselmann | def _GetArchivedJobPath(job_id): |
409 | 0cb94105 | Michael Hanselmann | return os.path.join(constants.JOB_QUEUE_ARCHIVE_DIR, "job-%s" % job_id) |
410 | 0cb94105 | Michael Hanselmann | |
411 | 85f03e0d | Michael Hanselmann | @classmethod
|
412 | 85f03e0d | Michael Hanselmann | def _ExtractJobID(cls, name): |
413 | 85f03e0d | Michael Hanselmann | m = cls._RE_JOB_FILE.match(name) |
414 | fae737ac | Michael Hanselmann | if m:
|
415 | fae737ac | Michael Hanselmann | return m.group(1) |
416 | fae737ac | Michael Hanselmann | else:
|
417 | fae737ac | Michael Hanselmann | return None |
418 | fae737ac | Michael Hanselmann | |
419 | 911a495b | Iustin Pop | def _GetJobIDsUnlocked(self, archived=False): |
420 | 911a495b | Iustin Pop | """Return all known job IDs.
|
421 | 911a495b | Iustin Pop |
|
422 | 911a495b | Iustin Pop | If the parameter archived is True, archived jobs IDs will be
|
423 | 911a495b | Iustin Pop | included. Currently this argument is unused.
|
424 | 911a495b | Iustin Pop |
|
425 | ac0930b9 | Iustin Pop | The method only looks at disk because it's a requirement that all
|
426 | ac0930b9 | Iustin Pop | jobs are present on disk (so in the _memcache we don't have any
|
427 | ac0930b9 | Iustin Pop | extra IDs).
|
428 | ac0930b9 | Iustin Pop |
|
429 | 911a495b | Iustin Pop | """
|
430 | fae737ac | Michael Hanselmann | jlist = [self._ExtractJobID(name) for name in self._ListJobFiles()] |
431 | f0d874fe | Iustin Pop | jlist.sort() |
432 | f0d874fe | Iustin Pop | return jlist
|
433 | 911a495b | Iustin Pop | |
434 | f1da30e6 | Michael Hanselmann | def _ListJobFiles(self): |
435 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
436 | f1da30e6 | Michael Hanselmann | |
437 | f1da30e6 | Michael Hanselmann | return [name for name in utils.ListVisibleFiles(constants.QUEUE_DIR) |
438 | f1da30e6 | Michael Hanselmann | if self._RE_JOB_FILE.match(name)] |
439 | f1da30e6 | Michael Hanselmann | |
440 | 911a495b | Iustin Pop | def _LoadJobUnlocked(self, job_id): |
441 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
442 | f1da30e6 | Michael Hanselmann | |
443 | ac0930b9 | Iustin Pop | if job_id in self._memcache: |
444 | 205d71fd | Michael Hanselmann | logging.debug("Found job %s in memcache", job_id)
|
445 | ac0930b9 | Iustin Pop | return self._memcache[job_id] |
446 | ac0930b9 | Iustin Pop | |
447 | 911a495b | Iustin Pop | filepath = self._GetJobPath(job_id)
|
448 | f1da30e6 | Michael Hanselmann | logging.debug("Loading job from %s", filepath)
|
449 | f1da30e6 | Michael Hanselmann | try:
|
450 | f1da30e6 | Michael Hanselmann | fd = open(filepath, "r") |
451 | f1da30e6 | Michael Hanselmann | except IOError, err: |
452 | f1da30e6 | Michael Hanselmann | if err.errno in (errno.ENOENT, ): |
453 | f1da30e6 | Michael Hanselmann | return None |
454 | f1da30e6 | Michael Hanselmann | raise
|
455 | f1da30e6 | Michael Hanselmann | try:
|
456 | f1da30e6 | Michael Hanselmann | data = serializer.LoadJson(fd.read()) |
457 | f1da30e6 | Michael Hanselmann | finally:
|
458 | f1da30e6 | Michael Hanselmann | fd.close() |
459 | f1da30e6 | Michael Hanselmann | |
460 | ac0930b9 | Iustin Pop | job = _QueuedJob.Restore(self, data)
|
461 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
462 | 205d71fd | Michael Hanselmann | logging.debug("Added job %s to the cache", job_id)
|
463 | ac0930b9 | Iustin Pop | return job
|
464 | f1da30e6 | Michael Hanselmann | |
465 | f1da30e6 | Michael Hanselmann | def _GetJobsUnlocked(self, job_ids): |
466 | 911a495b | Iustin Pop | if not job_ids: |
467 | 911a495b | Iustin Pop | job_ids = self._GetJobIDsUnlocked()
|
468 | f1da30e6 | Michael Hanselmann | |
469 | 911a495b | Iustin Pop | return [self._LoadJobUnlocked(job_id) for job_id in job_ids] |
470 | f1da30e6 | Michael Hanselmann | |
471 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
472 | 85f03e0d | Michael Hanselmann | def SubmitJob(self, ops, nodes): |
473 | 85f03e0d | Michael Hanselmann | """Create and store a new job.
|
474 | f1da30e6 | Michael Hanselmann |
|
475 | 85f03e0d | Michael Hanselmann | This enters the job into our job queue and also puts it on the new
|
476 | 85f03e0d | Michael Hanselmann | queue, in order for it to be picked up by the queue processors.
|
477 | c3f0a12f | Iustin Pop |
|
478 | c3f0a12f | Iustin Pop | @type ops: list
|
479 | 205d71fd | Michael Hanselmann | @param ops: The list of OpCodes that will become the new job.
|
480 | c3f0a12f | Iustin Pop | @type nodes: list
|
481 | c3f0a12f | Iustin Pop | @param nodes: The list of nodes to which the new job serial will be
|
482 | c3f0a12f | Iustin Pop | distributed.
|
483 | c3f0a12f | Iustin Pop |
|
484 | c3f0a12f | Iustin Pop | """
|
485 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
486 | f1da30e6 | Michael Hanselmann | |
487 | f1da30e6 | Michael Hanselmann | # Get job identifier
|
488 | c3f0a12f | Iustin Pop | job_id = self._NewSerialUnlocked(nodes)
|
489 | f1da30e6 | Michael Hanselmann | job = _QueuedJob(self, job_id, ops)
|
490 | f1da30e6 | Michael Hanselmann | |
491 | f1da30e6 | Michael Hanselmann | # Write to disk
|
492 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
493 | f1da30e6 | Michael Hanselmann | |
494 | 205d71fd | Michael Hanselmann | logging.debug("Added new job %s to the cache", job_id)
|
495 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
496 | ac0930b9 | Iustin Pop | |
497 | 85f03e0d | Michael Hanselmann | # Add to worker pool
|
498 | 85f03e0d | Michael Hanselmann | self._wpool.AddTask(job)
|
499 | 85f03e0d | Michael Hanselmann | |
500 | 85f03e0d | Michael Hanselmann | return job.id
|
501 | f1da30e6 | Michael Hanselmann | |
502 | 85f03e0d | Michael Hanselmann | def UpdateJobUnlocked(self, job): |
503 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
504 | f1da30e6 | Michael Hanselmann | |
505 | f1da30e6 | Michael Hanselmann | filename = self._GetJobPath(job.id)
|
506 | f1da30e6 | Michael Hanselmann | logging.debug("Writing job %s to %s", job.id, filename)
|
507 | f1da30e6 | Michael Hanselmann | utils.WriteFile(filename, |
508 | f1da30e6 | Michael Hanselmann | data=serializer.DumpJson(job.Serialize(), indent=False))
|
509 | 57f8615f | Michael Hanselmann | self._CleanCacheUnlocked([job.id])
|
510 | ac0930b9 | Iustin Pop | |
511 | 57f8615f | Michael Hanselmann | def _CleanCacheUnlocked(self, exclude): |
512 | ac0930b9 | Iustin Pop | """Clean the memory cache.
|
513 | ac0930b9 | Iustin Pop |
|
514 | ac0930b9 | Iustin Pop | The exceptions argument contains job IDs that should not be
|
515 | ac0930b9 | Iustin Pop | cleaned.
|
516 | ac0930b9 | Iustin Pop |
|
517 | ac0930b9 | Iustin Pop | """
|
518 | 57f8615f | Michael Hanselmann | assert isinstance(exclude, list) |
519 | 85f03e0d | Michael Hanselmann | |
520 | ac0930b9 | Iustin Pop | for job in self._memcache.values(): |
521 | 57f8615f | Michael Hanselmann | if job.id in exclude: |
522 | ac0930b9 | Iustin Pop | continue
|
523 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_QUEUED, |
524 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_RUNNING): |
525 | 205d71fd | Michael Hanselmann | logging.debug("Cleaning job %s from the cache", job.id)
|
526 | ac0930b9 | Iustin Pop | try:
|
527 | ac0930b9 | Iustin Pop | del self._memcache[job.id] |
528 | ac0930b9 | Iustin Pop | except KeyError: |
529 | ac0930b9 | Iustin Pop | pass
|
530 | f1da30e6 | Michael Hanselmann | |
531 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
532 | 188c5e0a | Michael Hanselmann | def CancelJob(self, job_id): |
533 | 188c5e0a | Michael Hanselmann | """Cancels a job.
|
534 | 188c5e0a | Michael Hanselmann |
|
535 | 188c5e0a | Michael Hanselmann | @type job_id: string
|
536 | 188c5e0a | Michael Hanselmann | @param job_id: Job ID of job to be cancelled.
|
537 | 188c5e0a | Michael Hanselmann |
|
538 | 188c5e0a | Michael Hanselmann | """
|
539 | 188c5e0a | Michael Hanselmann | logging.debug("Cancelling job %s", job_id)
|
540 | 188c5e0a | Michael Hanselmann | |
541 | 85f03e0d | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
542 | 188c5e0a | Michael Hanselmann | if not job: |
543 | 188c5e0a | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
544 | 188c5e0a | Michael Hanselmann | return
|
545 | 188c5e0a | Michael Hanselmann | |
546 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_QUEUED,): |
547 | 188c5e0a | Michael Hanselmann | logging.debug("Job %s is no longer in the queue", job.id)
|
548 | 188c5e0a | Michael Hanselmann | return
|
549 | 188c5e0a | Michael Hanselmann | |
550 | 85f03e0d | Michael Hanselmann | try:
|
551 | 85f03e0d | Michael Hanselmann | for op in job.ops: |
552 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
553 | 85f03e0d | Michael Hanselmann | op.result = "Job cancelled by request"
|
554 | 85f03e0d | Michael Hanselmann | finally:
|
555 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
556 | 188c5e0a | Michael Hanselmann | |
557 | c609f802 | Michael Hanselmann | @utils.LockedMethod
|
558 | f1da30e6 | Michael Hanselmann | def ArchiveJob(self, job_id): |
559 | c609f802 | Michael Hanselmann | """Archives a job.
|
560 | c609f802 | Michael Hanselmann |
|
561 | c609f802 | Michael Hanselmann | @type job_id: string
|
562 | c609f802 | Michael Hanselmann | @param job_id: Job ID of job to be archived.
|
563 | c609f802 | Michael Hanselmann |
|
564 | c609f802 | Michael Hanselmann | """
|
565 | c609f802 | Michael Hanselmann | logging.debug("Archiving job %s", job_id)
|
566 | c609f802 | Michael Hanselmann | |
567 | c609f802 | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
568 | c609f802 | Michael Hanselmann | if not job: |
569 | c609f802 | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
570 | c609f802 | Michael Hanselmann | return
|
571 | c609f802 | Michael Hanselmann | |
572 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_CANCELED, |
573 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_SUCCESS, |
574 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_ERROR): |
575 | 85f03e0d | Michael Hanselmann | logging.debug("Job %s is not yet done", job.id)
|
576 | c609f802 | Michael Hanselmann | return
|
577 | c609f802 | Michael Hanselmann | |
578 | c609f802 | Michael Hanselmann | try:
|
579 | c609f802 | Michael Hanselmann | old = self._GetJobPath(job.id)
|
580 | c609f802 | Michael Hanselmann | new = self._GetArchivedJobPath(job.id)
|
581 | c609f802 | Michael Hanselmann | |
582 | c609f802 | Michael Hanselmann | os.rename(old, new) |
583 | c609f802 | Michael Hanselmann | |
584 | c609f802 | Michael Hanselmann | logging.debug("Successfully archived job %s", job.id)
|
585 | c609f802 | Michael Hanselmann | finally:
|
586 | c609f802 | Michael Hanselmann | # Cleaning the cache because we don't know what os.rename actually did
|
587 | c609f802 | Michael Hanselmann | # and to be on the safe side.
|
588 | c609f802 | Michael Hanselmann | self._CleanCacheUnlocked([])
|
589 | f1da30e6 | Michael Hanselmann | |
590 | 85f03e0d | Michael Hanselmann | def _GetJobInfoUnlocked(self, job, fields): |
591 | e2715f69 | Michael Hanselmann | row = [] |
592 | e2715f69 | Michael Hanselmann | for fname in fields: |
593 | e2715f69 | Michael Hanselmann | if fname == "id": |
594 | e2715f69 | Michael Hanselmann | row.append(job.id) |
595 | e2715f69 | Michael Hanselmann | elif fname == "status": |
596 | 85f03e0d | Michael Hanselmann | row.append(job.CalcStatus()) |
597 | af30b2fd | Michael Hanselmann | elif fname == "ops": |
598 | 85f03e0d | Michael Hanselmann | row.append([op.input.__getstate__() for op in job.ops]) |
599 | af30b2fd | Michael Hanselmann | elif fname == "opresult": |
600 | 85f03e0d | Michael Hanselmann | row.append([op.result for op in job.ops]) |
601 | af30b2fd | Michael Hanselmann | elif fname == "opstatus": |
602 | 85f03e0d | Michael Hanselmann | row.append([op.status for op in job.ops]) |
603 | f1048938 | Iustin Pop | elif fname == "ticker": |
604 | 85f03e0d | Michael Hanselmann | ji = job.run_op_index |
605 | f1048938 | Iustin Pop | if ji < 0: |
606 | f1048938 | Iustin Pop | lmsg = None
|
607 | f1048938 | Iustin Pop | else:
|
608 | 85f03e0d | Michael Hanselmann | lmsg = job.ops[ji].RetrieveLog(-1)
|
609 | f1048938 | Iustin Pop | # message might be empty here
|
610 | f1048938 | Iustin Pop | if lmsg:
|
611 | f1048938 | Iustin Pop | lmsg = lmsg[0]
|
612 | f1048938 | Iustin Pop | else:
|
613 | f1048938 | Iustin Pop | lmsg = None
|
614 | f1048938 | Iustin Pop | row.append(lmsg) |
615 | e2715f69 | Michael Hanselmann | else:
|
616 | e2715f69 | Michael Hanselmann | raise errors.OpExecError("Invalid job query field '%s'" % fname) |
617 | e2715f69 | Michael Hanselmann | return row
|
618 | e2715f69 | Michael Hanselmann | |
619 | 85f03e0d | Michael Hanselmann | @utils.LockedMethod
|
620 | e2715f69 | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
621 | e2715f69 | Michael Hanselmann | """Returns a list of jobs in queue.
|
622 | e2715f69 | Michael Hanselmann |
|
623 | e2715f69 | Michael Hanselmann | Args:
|
624 | e2715f69 | Michael Hanselmann | - job_ids: Sequence of job identifiers or None for all
|
625 | e2715f69 | Michael Hanselmann | - fields: Names of fields to return
|
626 | e2715f69 | Michael Hanselmann |
|
627 | e2715f69 | Michael Hanselmann | """
|
628 | 85f03e0d | Michael Hanselmann | jobs = [] |
629 | e2715f69 | Michael Hanselmann | |
630 | 85f03e0d | Michael Hanselmann | for job in self._GetJobsUnlocked(job_ids): |
631 | 85f03e0d | Michael Hanselmann | if job is None: |
632 | 85f03e0d | Michael Hanselmann | jobs.append(None)
|
633 | 85f03e0d | Michael Hanselmann | else:
|
634 | 85f03e0d | Michael Hanselmann | jobs.append(self._GetJobInfoUnlocked(job, fields))
|
635 | e2715f69 | Michael Hanselmann | |
636 | 85f03e0d | Michael Hanselmann | return jobs
|
637 | e2715f69 | Michael Hanselmann | |
638 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
639 | e2715f69 | Michael Hanselmann | def Shutdown(self): |
640 | e2715f69 | Michael Hanselmann | """Stops the job queue.
|
641 | e2715f69 | Michael Hanselmann |
|
642 | e2715f69 | Michael Hanselmann | """
|
643 | 85f03e0d | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
644 | 85f03e0d | Michael Hanselmann | |
645 | e2715f69 | Michael Hanselmann | self._wpool.TerminateWorkers()
|
646 | 85f03e0d | Michael Hanselmann | |
647 | 85f03e0d | Michael Hanselmann | self.lock_fd.close()
|
648 | 85f03e0d | Michael Hanselmann | self.lock_fd = None |