root / lib / jqueue.py @ f0d874fe
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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 | e2715f69 | Michael Hanselmann | |
39 | e2715f69 | Michael Hanselmann | |
40 | e2715f69 | Michael Hanselmann | JOBQUEUE_THREADS = 5
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41 | e2715f69 | Michael Hanselmann | |
42 | 498ae1cc | Iustin Pop | |
43 | e2715f69 | Michael Hanselmann | class _QueuedOpCode(object): |
44 | e2715f69 | Michael Hanselmann | """Encasulates an opcode object.
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45 | e2715f69 | Michael Hanselmann |
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46 | 307149a8 | Iustin Pop | Access is synchronized by the '_lock' attribute.
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47 | e2715f69 | Michael Hanselmann |
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48 | f1048938 | Iustin Pop | The 'log' attribute holds the execution log and consists of tuples
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49 | f1048938 | Iustin Pop | of the form (timestamp, level, message).
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50 | f1048938 | Iustin Pop |
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51 | e2715f69 | Michael Hanselmann | """
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52 | e2715f69 | Michael Hanselmann | def __init__(self, op): |
53 | f1048938 | Iustin Pop | self.__Setup(op, constants.OP_STATUS_QUEUED, None, []) |
54 | f1da30e6 | Michael Hanselmann | |
55 | f1048938 | Iustin Pop | def __Setup(self, input_, status, result, log): |
56 | 307149a8 | Iustin Pop | self._lock = threading.Lock()
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57 | f1048938 | Iustin Pop | self.input = input_
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58 | f1da30e6 | Michael Hanselmann | self.status = status
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59 | f1da30e6 | Michael Hanselmann | self.result = result
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60 | f1048938 | Iustin Pop | self.log = log
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61 | f1da30e6 | Michael Hanselmann | |
62 | f1da30e6 | Michael Hanselmann | @classmethod
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63 | f1da30e6 | Michael Hanselmann | def Restore(cls, state): |
64 | f1da30e6 | Michael Hanselmann | obj = object.__new__(cls)
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65 | f1da30e6 | Michael Hanselmann | obj.__Setup(opcodes.OpCode.LoadOpCode(state["input"]),
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66 | f1048938 | Iustin Pop | state["status"], state["result"], state["log"]) |
67 | f1da30e6 | Michael Hanselmann | return obj
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68 | f1da30e6 | Michael Hanselmann | |
69 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
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70 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
71 | f1da30e6 | Michael Hanselmann | return {
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72 | f1da30e6 | Michael Hanselmann | "input": self.input.__getstate__(), |
73 | f1da30e6 | Michael Hanselmann | "status": self.status, |
74 | f1da30e6 | Michael Hanselmann | "result": self.result, |
75 | f1048938 | Iustin Pop | "log": self.log, |
76 | f1da30e6 | Michael Hanselmann | } |
77 | 307149a8 | Iustin Pop | |
78 | 307149a8 | Iustin Pop | @utils.LockedMethod
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79 | af30b2fd | Michael Hanselmann | def GetInput(self): |
80 | af30b2fd | Michael Hanselmann | """Returns the original opcode.
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81 | af30b2fd | Michael Hanselmann |
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82 | af30b2fd | Michael Hanselmann | """
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83 | af30b2fd | Michael Hanselmann | return self.input |
84 | af30b2fd | Michael Hanselmann | |
85 | af30b2fd | Michael Hanselmann | @utils.LockedMethod
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86 | 307149a8 | Iustin Pop | def SetStatus(self, status, result): |
87 | 307149a8 | Iustin Pop | """Update the opcode status and result.
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88 | 307149a8 | Iustin Pop |
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89 | 307149a8 | Iustin Pop | """
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90 | 307149a8 | Iustin Pop | self.status = status
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91 | 307149a8 | Iustin Pop | self.result = result
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92 | 307149a8 | Iustin Pop | |
93 | 307149a8 | Iustin Pop | @utils.LockedMethod
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94 | 307149a8 | Iustin Pop | def GetStatus(self): |
95 | 307149a8 | Iustin Pop | """Get the opcode status.
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96 | 307149a8 | Iustin Pop |
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97 | 307149a8 | Iustin Pop | """
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98 | 307149a8 | Iustin Pop | return self.status |
99 | 307149a8 | Iustin Pop | |
100 | 307149a8 | Iustin Pop | @utils.LockedMethod
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101 | 307149a8 | Iustin Pop | def GetResult(self): |
102 | 307149a8 | Iustin Pop | """Get the opcode result.
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103 | 307149a8 | Iustin Pop |
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104 | 307149a8 | Iustin Pop | """
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105 | 307149a8 | Iustin Pop | return self.result |
106 | e2715f69 | Michael Hanselmann | |
107 | f1048938 | Iustin Pop | @utils.LockedMethod
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108 | f1048938 | Iustin Pop | def Log(self, *args): |
109 | f1048938 | Iustin Pop | """Append a log entry.
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110 | f1048938 | Iustin Pop |
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111 | f1048938 | Iustin Pop | """
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112 | f1048938 | Iustin Pop | assert len(args) < 2 |
113 | f1048938 | Iustin Pop | |
114 | f1048938 | Iustin Pop | if len(args) == 1: |
115 | f1048938 | Iustin Pop | log_type = constants.ELOG_MESSAGE |
116 | f1048938 | Iustin Pop | log_msg = args[0]
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117 | f1048938 | Iustin Pop | else:
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118 | f1048938 | Iustin Pop | log_type, log_msg = args |
119 | f1048938 | Iustin Pop | self.log.append((time.time(), log_type, log_msg))
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120 | f1048938 | Iustin Pop | |
121 | f1048938 | Iustin Pop | @utils.LockedMethod
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122 | f1048938 | Iustin Pop | def RetrieveLog(self, start_at=0): |
123 | f1048938 | Iustin Pop | """Retrieve (a part of) the execution log.
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124 | f1048938 | Iustin Pop |
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125 | f1048938 | Iustin Pop | """
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126 | f1048938 | Iustin Pop | return self.log[start_at:] |
127 | f1048938 | Iustin Pop | |
128 | e2715f69 | Michael Hanselmann | |
129 | e2715f69 | Michael Hanselmann | class _QueuedJob(object): |
130 | e2715f69 | Michael Hanselmann | """In-memory job representation.
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131 | e2715f69 | Michael Hanselmann |
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132 | e2715f69 | Michael Hanselmann | This is what we use to track the user-submitted jobs.
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133 | e2715f69 | Michael Hanselmann |
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134 | e2715f69 | Michael Hanselmann | """
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135 | f1da30e6 | Michael Hanselmann | def __init__(self, storage, job_id, ops): |
136 | e2715f69 | Michael Hanselmann | if not ops: |
137 | e2715f69 | Michael Hanselmann | # TODO
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138 | e2715f69 | Michael Hanselmann | raise Exception("No opcodes") |
139 | e2715f69 | Michael Hanselmann | |
140 | f1048938 | Iustin Pop | self.__Setup(storage, job_id, [_QueuedOpCode(op) for op in ops], -1) |
141 | e2715f69 | Michael Hanselmann | |
142 | f1048938 | Iustin Pop | def __Setup(self, storage, job_id, ops, run_op_index): |
143 | f1048938 | Iustin Pop | self._lock = threading.Lock()
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144 | f1da30e6 | Michael Hanselmann | self.storage = storage
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145 | f1da30e6 | Michael Hanselmann | self.id = job_id
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146 | f1da30e6 | Michael Hanselmann | self._ops = ops
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147 | f1048938 | Iustin Pop | self.run_op_index = run_op_index
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148 | f1da30e6 | Michael Hanselmann | |
149 | f1da30e6 | Michael Hanselmann | @classmethod
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150 | f1da30e6 | Michael Hanselmann | def Restore(cls, storage, state): |
151 | f1da30e6 | Michael Hanselmann | obj = object.__new__(cls)
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152 | f1048938 | Iustin Pop | op_list = [_QueuedOpCode.Restore(op_state) for op_state in state["ops"]] |
153 | f1048938 | Iustin Pop | obj.__Setup(storage, state["id"], op_list, state["run_op_index"]) |
154 | f1da30e6 | Michael Hanselmann | return obj
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155 | f1da30e6 | Michael Hanselmann | |
156 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
157 | f1da30e6 | Michael Hanselmann | return {
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158 | f1da30e6 | Michael Hanselmann | "id": self.id, |
159 | f1da30e6 | Michael Hanselmann | "ops": [op.Serialize() for op in self._ops], |
160 | f1048938 | Iustin Pop | "run_op_index": self.run_op_index, |
161 | f1da30e6 | Michael Hanselmann | } |
162 | f1da30e6 | Michael Hanselmann | |
163 | f1da30e6 | Michael Hanselmann | def SetUnclean(self, msg): |
164 | f1da30e6 | Michael Hanselmann | try:
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165 | f1da30e6 | Michael Hanselmann | for op in self._ops: |
166 | f1da30e6 | Michael Hanselmann | op.SetStatus(constants.OP_STATUS_ERROR, msg) |
167 | f1da30e6 | Michael Hanselmann | finally:
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168 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
169 | e2715f69 | Michael Hanselmann | |
170 | 307149a8 | Iustin Pop | def GetStatus(self): |
171 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_QUEUED |
172 | e2715f69 | Michael Hanselmann | |
173 | e2715f69 | Michael Hanselmann | all_success = True
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174 | e2715f69 | Michael Hanselmann | for op in self._ops: |
175 | 307149a8 | Iustin Pop | op_status = op.GetStatus() |
176 | 307149a8 | Iustin Pop | if op_status == constants.OP_STATUS_SUCCESS:
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177 | e2715f69 | Michael Hanselmann | continue
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178 | e2715f69 | Michael Hanselmann | |
179 | e2715f69 | Michael Hanselmann | all_success = False
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180 | e2715f69 | Michael Hanselmann | |
181 | 307149a8 | Iustin Pop | if op_status == constants.OP_STATUS_QUEUED:
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182 | e2715f69 | Michael Hanselmann | pass
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183 | 307149a8 | Iustin Pop | elif op_status == constants.OP_STATUS_RUNNING:
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184 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_RUNNING |
185 | f1da30e6 | Michael Hanselmann | elif op_status == constants.OP_STATUS_ERROR:
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186 | f1da30e6 | Michael Hanselmann | status = constants.JOB_STATUS_ERROR |
187 | f1da30e6 | Michael Hanselmann | # The whole job fails if one opcode failed
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188 | f1da30e6 | Michael Hanselmann | break
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189 | e2715f69 | Michael Hanselmann | |
190 | e2715f69 | Michael Hanselmann | if all_success:
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191 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_SUCCESS |
192 | e2715f69 | Michael Hanselmann | |
193 | e2715f69 | Michael Hanselmann | return status
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194 | e2715f69 | Michael Hanselmann | |
195 | f1048938 | Iustin Pop | @utils.LockedMethod
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196 | f1048938 | Iustin Pop | def GetRunOpIndex(self): |
197 | f1048938 | Iustin Pop | return self.run_op_index |
198 | f1048938 | Iustin Pop | |
199 | e2715f69 | Michael Hanselmann | def Run(self, proc): |
200 | e2715f69 | Michael Hanselmann | """Job executor.
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201 | e2715f69 | Michael Hanselmann |
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202 | e2715f69 | Michael Hanselmann | This functions processes a this job in the context of given processor
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203 | e2715f69 | Michael Hanselmann | instance.
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204 | e2715f69 | Michael Hanselmann |
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205 | e2715f69 | Michael Hanselmann | Args:
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206 | e2715f69 | Michael Hanselmann | - proc: Ganeti Processor to run the job with
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207 | e2715f69 | Michael Hanselmann |
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208 | e2715f69 | Michael Hanselmann | """
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209 | e2715f69 | Michael Hanselmann | try:
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210 | c8549bfd | Michael Hanselmann | count = len(self._ops) |
211 | c8549bfd | Michael Hanselmann | for idx, op in enumerate(self._ops): |
212 | e2715f69 | Michael Hanselmann | try:
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213 | 307149a8 | Iustin Pop | logging.debug("Op %s/%s: Starting %s", idx + 1, count, op) |
214 | f1048938 | Iustin Pop | |
215 | f1048938 | Iustin Pop | self._lock.acquire()
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216 | f1048938 | Iustin Pop | try:
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217 | f1048938 | Iustin Pop | self.run_op_index = idx
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218 | f1048938 | Iustin Pop | finally:
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219 | f1048938 | Iustin Pop | self._lock.release()
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220 | f1048938 | Iustin Pop | |
221 | 307149a8 | Iustin Pop | op.SetStatus(constants.OP_STATUS_RUNNING, None)
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222 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
223 | e2715f69 | Michael Hanselmann | |
224 | f1048938 | Iustin Pop | result = proc.ExecOpCode(op.input, op.Log) |
225 | e2715f69 | Michael Hanselmann | |
226 | 307149a8 | Iustin Pop | op.SetStatus(constants.OP_STATUS_SUCCESS, result) |
227 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
228 | 307149a8 | Iustin Pop | logging.debug("Op %s/%s: Successfully finished %s",
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229 | 307149a8 | Iustin Pop | idx + 1, count, op)
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230 | e2715f69 | Michael Hanselmann | except Exception, err: |
231 | f1da30e6 | Michael Hanselmann | try:
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232 | f1da30e6 | Michael Hanselmann | op.SetStatus(constants.OP_STATUS_ERROR, str(err))
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233 | f1da30e6 | Michael Hanselmann | logging.debug("Op %s/%s: Error in %s", idx + 1, count, op) |
234 | f1da30e6 | Michael Hanselmann | finally:
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235 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
236 | e2715f69 | Michael Hanselmann | raise
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237 | e2715f69 | Michael Hanselmann | |
238 | e2715f69 | Michael Hanselmann | except errors.GenericError, err:
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239 | e2715f69 | Michael Hanselmann | logging.error("ganeti exception %s", exc_info=err)
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240 | e2715f69 | Michael Hanselmann | except Exception, err: |
241 | e2715f69 | Michael Hanselmann | logging.error("unhandled exception %s", exc_info=err)
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242 | e2715f69 | Michael Hanselmann | except:
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243 | e2715f69 | Michael Hanselmann | logging.error("unhandled unknown exception %s", exc_info=err)
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244 | e2715f69 | Michael Hanselmann | |
245 | e2715f69 | Michael Hanselmann | |
246 | e2715f69 | Michael Hanselmann | class _JobQueueWorker(workerpool.BaseWorker): |
247 | e2715f69 | Michael Hanselmann | def RunTask(self, job): |
248 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s processing job %s",
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249 | e2715f69 | Michael Hanselmann | self.worker_id, job.id)
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250 | e2715f69 | Michael Hanselmann | # TODO: feedback function
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251 | f1048938 | Iustin Pop | proc = mcpu.Processor(self.pool.context)
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252 | e2715f69 | Michael Hanselmann | try:
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253 | e2715f69 | Michael Hanselmann | job.Run(proc) |
254 | e2715f69 | Michael Hanselmann | finally:
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255 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s finished job %s, status = %s",
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256 | e2715f69 | Michael Hanselmann | self.worker_id, job.id, job.GetStatus())
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257 | e2715f69 | Michael Hanselmann | |
258 | e2715f69 | Michael Hanselmann | |
259 | e2715f69 | Michael Hanselmann | class _JobQueueWorkerPool(workerpool.WorkerPool): |
260 | e2715f69 | Michael Hanselmann | def __init__(self, context): |
261 | e2715f69 | Michael Hanselmann | super(_JobQueueWorkerPool, self).__init__(JOBQUEUE_THREADS, |
262 | e2715f69 | Michael Hanselmann | _JobQueueWorker) |
263 | e2715f69 | Michael Hanselmann | self.context = context
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264 | e2715f69 | Michael Hanselmann | |
265 | e2715f69 | Michael Hanselmann | |
266 | f1da30e6 | Michael Hanselmann | class JobStorage(object): |
267 | 911a495b | Iustin Pop | _RE_JOB_FILE = re.compile(r"^job-(\d+)$")
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268 | f1da30e6 | Michael Hanselmann | |
269 | f1da30e6 | Michael Hanselmann | def __init__(self): |
270 | f1da30e6 | Michael Hanselmann | self._lock = threading.Lock()
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271 | ac0930b9 | Iustin Pop | self._memcache = {}
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272 | f1da30e6 | Michael Hanselmann | |
273 | f1da30e6 | Michael Hanselmann | # Make sure our directory exists
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274 | f1da30e6 | Michael Hanselmann | try:
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275 | f1da30e6 | Michael Hanselmann | os.mkdir(constants.QUEUE_DIR, 0700)
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276 | f1da30e6 | Michael Hanselmann | except OSError, err: |
277 | f1da30e6 | Michael Hanselmann | if err.errno not in (errno.EEXIST, ): |
278 | f1da30e6 | Michael Hanselmann | raise
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279 | f1da30e6 | Michael Hanselmann | |
280 | f1da30e6 | Michael Hanselmann | # Get queue lock
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281 | f1da30e6 | Michael Hanselmann | self.lock_fd = open(constants.JOB_QUEUE_LOCK_FILE, "w") |
282 | f1da30e6 | Michael Hanselmann | try:
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283 | f1da30e6 | Michael Hanselmann | utils.LockFile(self.lock_fd)
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284 | f1da30e6 | Michael Hanselmann | except:
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285 | f1da30e6 | Michael Hanselmann | self.lock_fd.close()
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286 | f1da30e6 | Michael Hanselmann | raise
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287 | f1da30e6 | Michael Hanselmann | |
288 | f1da30e6 | Michael Hanselmann | # Read version
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289 | f1da30e6 | Michael Hanselmann | try:
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290 | f1da30e6 | Michael Hanselmann | version_fd = open(constants.JOB_QUEUE_VERSION_FILE, "r") |
291 | f1da30e6 | Michael Hanselmann | except IOError, err: |
292 | f1da30e6 | Michael Hanselmann | if err.errno not in (errno.ENOENT, ): |
293 | f1da30e6 | Michael Hanselmann | raise
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294 | f1da30e6 | Michael Hanselmann | |
295 | f1da30e6 | Michael Hanselmann | # Setup a new queue
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296 | f1da30e6 | Michael Hanselmann | self._InitQueueUnlocked()
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297 | f1da30e6 | Michael Hanselmann | |
298 | f1da30e6 | Michael Hanselmann | # Try to open again
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299 | f1da30e6 | Michael Hanselmann | version_fd = open(constants.JOB_QUEUE_VERSION_FILE, "r") |
300 | f1da30e6 | Michael Hanselmann | |
301 | f1da30e6 | Michael Hanselmann | try:
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302 | f1da30e6 | Michael Hanselmann | # Try to read version
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303 | f1da30e6 | Michael Hanselmann | version = int(version_fd.read(128)) |
304 | f1da30e6 | Michael Hanselmann | |
305 | f1da30e6 | Michael Hanselmann | # Verify version
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306 | f1da30e6 | Michael Hanselmann | if version != constants.JOB_QUEUE_VERSION:
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307 | f1da30e6 | Michael Hanselmann | raise errors.JobQueueError("Found version %s, expected %s", |
308 | f1da30e6 | Michael Hanselmann | version, constants.JOB_QUEUE_VERSION) |
309 | f1da30e6 | Michael Hanselmann | finally:
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310 | f1da30e6 | Michael Hanselmann | version_fd.close() |
311 | f1da30e6 | Michael Hanselmann | |
312 | f1da30e6 | Michael Hanselmann | serial_fd = open(constants.JOB_QUEUE_SERIAL_FILE, "r") |
313 | f1da30e6 | Michael Hanselmann | try:
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314 | f1da30e6 | Michael Hanselmann | # Read last serial
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315 | f1da30e6 | Michael Hanselmann | self._last_serial = int(serial_fd.read(1024).strip()) |
316 | f1da30e6 | Michael Hanselmann | finally:
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317 | f1da30e6 | Michael Hanselmann | serial_fd.close() |
318 | f1da30e6 | Michael Hanselmann | |
319 | f1da30e6 | Michael Hanselmann | def Close(self): |
320 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
321 | f1da30e6 | Michael Hanselmann | |
322 | f1da30e6 | Michael Hanselmann | self.lock_fd.close()
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323 | f1da30e6 | Michael Hanselmann | self.lock_fd = None |
324 | f1da30e6 | Michael Hanselmann | |
325 | f1da30e6 | Michael Hanselmann | def _InitQueueUnlocked(self): |
326 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
327 | f1da30e6 | Michael Hanselmann | |
328 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_VERSION_FILE, |
329 | f1da30e6 | Michael Hanselmann | data="%s\n" % constants.JOB_QUEUE_VERSION)
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330 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_SERIAL_FILE, |
331 | f1da30e6 | Michael Hanselmann | data="%s\n" % 0) |
332 | f1da30e6 | Michael Hanselmann | |
333 | f1da30e6 | Michael Hanselmann | def _NewSerialUnlocked(self): |
334 | f1da30e6 | Michael Hanselmann | """Generates a new job identifier.
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335 | f1da30e6 | Michael Hanselmann |
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336 | f1da30e6 | Michael Hanselmann | Job identifiers are unique during the lifetime of a cluster.
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337 | f1da30e6 | Michael Hanselmann |
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338 | f1da30e6 | Michael Hanselmann | Returns: A string representing the job identifier.
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339 | f1da30e6 | Michael Hanselmann |
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340 | f1da30e6 | Michael Hanselmann | """
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341 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
342 | f1da30e6 | Michael Hanselmann | |
343 | f1da30e6 | Michael Hanselmann | # New number
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344 | f1da30e6 | Michael Hanselmann | serial = self._last_serial + 1 |
345 | f1da30e6 | Michael Hanselmann | |
346 | f1da30e6 | Michael Hanselmann | # Write to file
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347 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_SERIAL_FILE, |
348 | f1da30e6 | Michael Hanselmann | data="%s\n" % serial)
|
349 | f1da30e6 | Michael Hanselmann | |
350 | f1da30e6 | Michael Hanselmann | # Keep it only if we were able to write the file
|
351 | f1da30e6 | Michael Hanselmann | self._last_serial = serial
|
352 | f1da30e6 | Michael Hanselmann | |
353 | f1da30e6 | Michael Hanselmann | return serial
|
354 | f1da30e6 | Michael Hanselmann | |
355 | f1da30e6 | Michael Hanselmann | def _GetJobPath(self, job_id): |
356 | f1da30e6 | Michael Hanselmann | return os.path.join(constants.QUEUE_DIR, "job-%s" % job_id) |
357 | f1da30e6 | Michael Hanselmann | |
358 | 911a495b | Iustin Pop | def _GetJobIDsUnlocked(self, archived=False): |
359 | 911a495b | Iustin Pop | """Return all known job IDs.
|
360 | 911a495b | Iustin Pop |
|
361 | 911a495b | Iustin Pop | If the parameter archived is True, archived jobs IDs will be
|
362 | 911a495b | Iustin Pop | included. Currently this argument is unused.
|
363 | 911a495b | Iustin Pop |
|
364 | ac0930b9 | Iustin Pop | The method only looks at disk because it's a requirement that all
|
365 | ac0930b9 | Iustin Pop | jobs are present on disk (so in the _memcache we don't have any
|
366 | ac0930b9 | Iustin Pop | extra IDs).
|
367 | ac0930b9 | Iustin Pop |
|
368 | 911a495b | Iustin Pop | """
|
369 | 911a495b | Iustin Pop | jfiles = self._ListJobFiles()
|
370 | f0d874fe | Iustin Pop | jlist = [int(m.group(1)) for m in |
371 | f0d874fe | Iustin Pop | [self._RE_JOB_FILE.match(name) for name in jfiles]] |
372 | f0d874fe | Iustin Pop | jlist.sort() |
373 | f0d874fe | Iustin Pop | return jlist
|
374 | 911a495b | Iustin Pop | |
375 | f1da30e6 | Michael Hanselmann | def _ListJobFiles(self): |
376 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
377 | f1da30e6 | Michael Hanselmann | |
378 | f1da30e6 | Michael Hanselmann | return [name for name in utils.ListVisibleFiles(constants.QUEUE_DIR) |
379 | f1da30e6 | Michael Hanselmann | if self._RE_JOB_FILE.match(name)] |
380 | f1da30e6 | Michael Hanselmann | |
381 | 911a495b | Iustin Pop | def _LoadJobUnlocked(self, job_id): |
382 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
383 | f1da30e6 | Michael Hanselmann | |
384 | ac0930b9 | Iustin Pop | if job_id in self._memcache: |
385 | ac0930b9 | Iustin Pop | logging.debug("Found job %d in memcache", job_id)
|
386 | ac0930b9 | Iustin Pop | return self._memcache[job_id] |
387 | ac0930b9 | Iustin Pop | |
388 | 911a495b | Iustin Pop | filepath = self._GetJobPath(job_id)
|
389 | f1da30e6 | Michael Hanselmann | logging.debug("Loading job from %s", filepath)
|
390 | f1da30e6 | Michael Hanselmann | try:
|
391 | f1da30e6 | Michael Hanselmann | fd = open(filepath, "r") |
392 | f1da30e6 | Michael Hanselmann | except IOError, err: |
393 | f1da30e6 | Michael Hanselmann | if err.errno in (errno.ENOENT, ): |
394 | f1da30e6 | Michael Hanselmann | return None |
395 | f1da30e6 | Michael Hanselmann | raise
|
396 | f1da30e6 | Michael Hanselmann | try:
|
397 | f1da30e6 | Michael Hanselmann | data = serializer.LoadJson(fd.read()) |
398 | f1da30e6 | Michael Hanselmann | finally:
|
399 | f1da30e6 | Michael Hanselmann | fd.close() |
400 | f1da30e6 | Michael Hanselmann | |
401 | ac0930b9 | Iustin Pop | job = _QueuedJob.Restore(self, data)
|
402 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
403 | ac0930b9 | Iustin Pop | logging.debug("Added job %d to the cache", job_id)
|
404 | ac0930b9 | Iustin Pop | return job
|
405 | f1da30e6 | Michael Hanselmann | |
406 | f1da30e6 | Michael Hanselmann | def _GetJobsUnlocked(self, job_ids): |
407 | 911a495b | Iustin Pop | if not job_ids: |
408 | 911a495b | Iustin Pop | job_ids = self._GetJobIDsUnlocked()
|
409 | f1da30e6 | Michael Hanselmann | |
410 | 911a495b | Iustin Pop | return [self._LoadJobUnlocked(job_id) for job_id in job_ids] |
411 | f1da30e6 | Michael Hanselmann | |
412 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
413 | f1da30e6 | Michael Hanselmann | def GetJobs(self, job_ids): |
414 | f1da30e6 | Michael Hanselmann | return self._GetJobsUnlocked(job_ids) |
415 | f1da30e6 | Michael Hanselmann | |
416 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
417 | f1da30e6 | Michael Hanselmann | def AddJob(self, ops): |
418 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
419 | f1da30e6 | Michael Hanselmann | |
420 | f1da30e6 | Michael Hanselmann | # Get job identifier
|
421 | f1da30e6 | Michael Hanselmann | job_id = self._NewSerialUnlocked()
|
422 | f1da30e6 | Michael Hanselmann | job = _QueuedJob(self, job_id, ops)
|
423 | f1da30e6 | Michael Hanselmann | |
424 | f1da30e6 | Michael Hanselmann | # Write to disk
|
425 | f1da30e6 | Michael Hanselmann | self._UpdateJobUnlocked(job)
|
426 | f1da30e6 | Michael Hanselmann | |
427 | ac0930b9 | Iustin Pop | logging.debug("Added new job %d to the cache", job_id)
|
428 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
429 | ac0930b9 | Iustin Pop | |
430 | f1da30e6 | Michael Hanselmann | return job
|
431 | f1da30e6 | Michael Hanselmann | |
432 | f1da30e6 | Michael Hanselmann | def _UpdateJobUnlocked(self, job): |
433 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
434 | f1da30e6 | Michael Hanselmann | |
435 | f1da30e6 | Michael Hanselmann | filename = self._GetJobPath(job.id)
|
436 | f1da30e6 | Michael Hanselmann | logging.debug("Writing job %s to %s", job.id, filename)
|
437 | f1da30e6 | Michael Hanselmann | utils.WriteFile(filename, |
438 | f1da30e6 | Michael Hanselmann | data=serializer.DumpJson(job.Serialize(), indent=False))
|
439 | ac0930b9 | Iustin Pop | self._CleanCacheUnlocked(exceptions=[job.id])
|
440 | ac0930b9 | Iustin Pop | |
441 | ac0930b9 | Iustin Pop | def _CleanCacheUnlocked(self, exceptions=None): |
442 | ac0930b9 | Iustin Pop | """Clean the memory cache.
|
443 | ac0930b9 | Iustin Pop |
|
444 | ac0930b9 | Iustin Pop | The exceptions argument contains job IDs that should not be
|
445 | ac0930b9 | Iustin Pop | cleaned.
|
446 | ac0930b9 | Iustin Pop |
|
447 | ac0930b9 | Iustin Pop | """
|
448 | ac0930b9 | Iustin Pop | assert isinstance(exceptions, list) |
449 | ac0930b9 | Iustin Pop | for job in self._memcache.values(): |
450 | ac0930b9 | Iustin Pop | if job.id in exceptions: |
451 | ac0930b9 | Iustin Pop | continue
|
452 | ac0930b9 | Iustin Pop | if job.GetStatus() not in (constants.JOB_STATUS_QUEUED, |
453 | ac0930b9 | Iustin Pop | constants.JOB_STATUS_RUNNING): |
454 | ac0930b9 | Iustin Pop | logging.debug("Cleaning job %d from the cache", job.id)
|
455 | ac0930b9 | Iustin Pop | try:
|
456 | ac0930b9 | Iustin Pop | del self._memcache[job.id] |
457 | ac0930b9 | Iustin Pop | except KeyError: |
458 | ac0930b9 | Iustin Pop | pass
|
459 | f1da30e6 | Michael Hanselmann | |
460 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
461 | f1da30e6 | Michael Hanselmann | def UpdateJob(self, job): |
462 | f1da30e6 | Michael Hanselmann | return self._UpdateJobUnlocked(job) |
463 | f1da30e6 | Michael Hanselmann | |
464 | f1da30e6 | Michael Hanselmann | def ArchiveJob(self, job_id): |
465 | f1da30e6 | Michael Hanselmann | raise NotImplementedError() |
466 | f1da30e6 | Michael Hanselmann | |
467 | f1da30e6 | Michael Hanselmann | |
468 | e2715f69 | Michael Hanselmann | class JobQueue: |
469 | e2715f69 | Michael Hanselmann | """The job queue.
|
470 | e2715f69 | Michael Hanselmann |
|
471 | e2715f69 | Michael Hanselmann | """
|
472 | e2715f69 | Michael Hanselmann | def __init__(self, context): |
473 | e2715f69 | Michael Hanselmann | self._lock = threading.Lock()
|
474 | f1da30e6 | Michael Hanselmann | self._jobs = JobStorage()
|
475 | e2715f69 | Michael Hanselmann | self._wpool = _JobQueueWorkerPool(context)
|
476 | e2715f69 | Michael Hanselmann | |
477 | f1da30e6 | Michael Hanselmann | for job in self._jobs.GetJobs(None): |
478 | f1da30e6 | Michael Hanselmann | status = job.GetStatus() |
479 | f1da30e6 | Michael Hanselmann | if status in (constants.JOB_STATUS_QUEUED, ): |
480 | f1da30e6 | Michael Hanselmann | self._wpool.AddTask(job)
|
481 | e2715f69 | Michael Hanselmann | |
482 | f1da30e6 | Michael Hanselmann | elif status in (constants.JOB_STATUS_RUNNING, ): |
483 | f1da30e6 | Michael Hanselmann | logging.warning("Unfinished job %s found: %s", job.id, job)
|
484 | f1da30e6 | Michael Hanselmann | job.SetUnclean("Unclean master daemon shutdown")
|
485 | e2715f69 | Michael Hanselmann | |
486 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
487 | e2715f69 | Michael Hanselmann | def SubmitJob(self, ops): |
488 | e2715f69 | Michael Hanselmann | """Add a new job to the queue.
|
489 | e2715f69 | Michael Hanselmann |
|
490 | e2715f69 | Michael Hanselmann | This enters the job into our job queue and also puts it on the new
|
491 | e2715f69 | Michael Hanselmann | queue, in order for it to be picked up by the queue processors.
|
492 | e2715f69 | Michael Hanselmann |
|
493 | e2715f69 | Michael Hanselmann | Args:
|
494 | e2715f69 | Michael Hanselmann | - ops: Sequence of opcodes
|
495 | e2715f69 | Michael Hanselmann |
|
496 | e2715f69 | Michael Hanselmann | """
|
497 | f1da30e6 | Michael Hanselmann | job = self._jobs.AddJob(ops)
|
498 | e2715f69 | Michael Hanselmann | |
499 | e2715f69 | Michael Hanselmann | # Add to worker pool
|
500 | e2715f69 | Michael Hanselmann | self._wpool.AddTask(job)
|
501 | e2715f69 | Michael Hanselmann | |
502 | f1da30e6 | Michael Hanselmann | return job.id
|
503 | e2715f69 | Michael Hanselmann | |
504 | e2715f69 | Michael Hanselmann | def ArchiveJob(self, job_id): |
505 | e2715f69 | Michael Hanselmann | raise NotImplementedError() |
506 | e2715f69 | Michael Hanselmann | |
507 | e2715f69 | Michael Hanselmann | def CancelJob(self, job_id): |
508 | e2715f69 | Michael Hanselmann | raise NotImplementedError() |
509 | e2715f69 | Michael Hanselmann | |
510 | e2715f69 | Michael Hanselmann | def _GetJobInfo(self, job, fields): |
511 | e2715f69 | Michael Hanselmann | row = [] |
512 | e2715f69 | Michael Hanselmann | for fname in fields: |
513 | e2715f69 | Michael Hanselmann | if fname == "id": |
514 | e2715f69 | Michael Hanselmann | row.append(job.id) |
515 | e2715f69 | Michael Hanselmann | elif fname == "status": |
516 | e2715f69 | Michael Hanselmann | row.append(job.GetStatus()) |
517 | af30b2fd | Michael Hanselmann | elif fname == "ops": |
518 | af30b2fd | Michael Hanselmann | row.append([op.GetInput().__getstate__() for op in job._ops]) |
519 | af30b2fd | Michael Hanselmann | elif fname == "opresult": |
520 | 307149a8 | Iustin Pop | row.append([op.GetResult() for op in job._ops]) |
521 | af30b2fd | Michael Hanselmann | elif fname == "opstatus": |
522 | af30b2fd | Michael Hanselmann | row.append([op.GetStatus() for op in job._ops]) |
523 | f1048938 | Iustin Pop | elif fname == "ticker": |
524 | f1048938 | Iustin Pop | ji = job.GetRunOpIndex() |
525 | f1048938 | Iustin Pop | if ji < 0: |
526 | f1048938 | Iustin Pop | lmsg = None
|
527 | f1048938 | Iustin Pop | else:
|
528 | f1048938 | Iustin Pop | lmsg = job._ops[ji].RetrieveLog(-1)
|
529 | f1048938 | Iustin Pop | # message might be empty here
|
530 | f1048938 | Iustin Pop | if lmsg:
|
531 | f1048938 | Iustin Pop | lmsg = lmsg[0]
|
532 | f1048938 | Iustin Pop | else:
|
533 | f1048938 | Iustin Pop | lmsg = None
|
534 | f1048938 | Iustin Pop | row.append(lmsg) |
535 | e2715f69 | Michael Hanselmann | else:
|
536 | e2715f69 | Michael Hanselmann | raise errors.OpExecError("Invalid job query field '%s'" % fname) |
537 | e2715f69 | Michael Hanselmann | return row
|
538 | e2715f69 | Michael Hanselmann | |
539 | e2715f69 | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
540 | e2715f69 | Michael Hanselmann | """Returns a list of jobs in queue.
|
541 | e2715f69 | Michael Hanselmann |
|
542 | e2715f69 | Michael Hanselmann | Args:
|
543 | e2715f69 | Michael Hanselmann | - job_ids: Sequence of job identifiers or None for all
|
544 | e2715f69 | Michael Hanselmann | - fields: Names of fields to return
|
545 | e2715f69 | Michael Hanselmann |
|
546 | e2715f69 | Michael Hanselmann | """
|
547 | e2715f69 | Michael Hanselmann | self._lock.acquire()
|
548 | e2715f69 | Michael Hanselmann | try:
|
549 | e2715f69 | Michael Hanselmann | jobs = [] |
550 | e2715f69 | Michael Hanselmann | |
551 | f1da30e6 | Michael Hanselmann | for job in self._jobs.GetJobs(job_ids): |
552 | e2715f69 | Michael Hanselmann | if job is None: |
553 | e2715f69 | Michael Hanselmann | jobs.append(None)
|
554 | e2715f69 | Michael Hanselmann | else:
|
555 | e2715f69 | Michael Hanselmann | jobs.append(self._GetJobInfo(job, fields))
|
556 | e2715f69 | Michael Hanselmann | |
557 | e2715f69 | Michael Hanselmann | return jobs
|
558 | e2715f69 | Michael Hanselmann | finally:
|
559 | e2715f69 | Michael Hanselmann | self._lock.release()
|
560 | e2715f69 | Michael Hanselmann | |
561 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
562 | e2715f69 | Michael Hanselmann | def Shutdown(self): |
563 | e2715f69 | Michael Hanselmann | """Stops the job queue.
|
564 | e2715f69 | Michael Hanselmann |
|
565 | e2715f69 | Michael Hanselmann | """
|
566 | e2715f69 | Michael Hanselmann | self._wpool.TerminateWorkers()
|
567 | f1da30e6 | Michael Hanselmann | self._jobs.Close() |