root / lib / jqueue.py @ bf75f132
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2 | 498ae1cc | Iustin Pop | #
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3 | 498ae1cc | Iustin Pop | |
4 | 5685c1a5 | Michael Hanselmann | # Copyright (C) 2006, 2007, 2008 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 | 6c5a7090 | Michael Hanselmann | """Module implementing the job queue handling.
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23 | 6c5a7090 | Michael Hanselmann |
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24 | ea03467c | Iustin Pop | Locking: there's a single, large lock in the L{JobQueue} class. It's
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25 | ea03467c | Iustin Pop | used by all other classes in this module.
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26 | ea03467c | Iustin Pop |
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27 | ea03467c | Iustin Pop | @var JOBQUEUE_THREADS: the number of worker threads we start for
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28 | ea03467c | Iustin Pop | processing jobs
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29 | 6c5a7090 | Michael Hanselmann |
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30 | 6c5a7090 | Michael Hanselmann | """
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31 | 498ae1cc | Iustin Pop | |
32 | f1da30e6 | Michael Hanselmann | import os |
33 | e2715f69 | Michael Hanselmann | import logging |
34 | e2715f69 | Michael Hanselmann | import threading |
35 | f1da30e6 | Michael Hanselmann | import errno |
36 | f1da30e6 | Michael Hanselmann | import re |
37 | f1048938 | Iustin Pop | import time |
38 | 5685c1a5 | Michael Hanselmann | import weakref |
39 | 498ae1cc | Iustin Pop | |
40 | e2715f69 | Michael Hanselmann | from ganeti import constants |
41 | f1da30e6 | Michael Hanselmann | from ganeti import serializer |
42 | e2715f69 | Michael Hanselmann | from ganeti import workerpool |
43 | f1da30e6 | Michael Hanselmann | from ganeti import opcodes |
44 | 7a1ecaed | Iustin Pop | from ganeti import errors |
45 | e2715f69 | Michael Hanselmann | from ganeti import mcpu |
46 | 7996a135 | Iustin Pop | from ganeti import utils |
47 | 04ab05ce | Michael Hanselmann | from ganeti import jstore |
48 | c3f0a12f | Iustin Pop | from ganeti import rpc |
49 | e2715f69 | Michael Hanselmann | |
50 | fbf0262f | Michael Hanselmann | |
51 | 1daae384 | Iustin Pop | JOBQUEUE_THREADS = 25
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52 | e2715f69 | Michael Hanselmann | |
53 | 498ae1cc | Iustin Pop | |
54 | 9728ae5d | Iustin Pop | class CancelJob(Exception): |
55 | fbf0262f | Michael Hanselmann | """Special exception to cancel a job.
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56 | fbf0262f | Michael Hanselmann |
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57 | fbf0262f | Michael Hanselmann | """
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58 | fbf0262f | Michael Hanselmann | |
59 | fbf0262f | Michael Hanselmann | |
60 | 70552c46 | Michael Hanselmann | def TimeStampNow(): |
61 | ea03467c | Iustin Pop | """Returns the current timestamp.
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62 | ea03467c | Iustin Pop |
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63 | ea03467c | Iustin Pop | @rtype: tuple
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64 | ea03467c | Iustin Pop | @return: the current time in the (seconds, microseconds) format
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65 | ea03467c | Iustin Pop |
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66 | ea03467c | Iustin Pop | """
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67 | 70552c46 | Michael Hanselmann | return utils.SplitTime(time.time())
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68 | 70552c46 | Michael Hanselmann | |
69 | 70552c46 | Michael Hanselmann | |
70 | e2715f69 | Michael Hanselmann | class _QueuedOpCode(object): |
71 | e2715f69 | Michael Hanselmann | """Encasulates an opcode object.
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72 | e2715f69 | Michael Hanselmann |
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73 | ea03467c | Iustin Pop | @ivar log: holds the execution log and consists of tuples
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74 | ea03467c | Iustin Pop | of the form C{(log_serial, timestamp, level, message)}
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75 | ea03467c | Iustin Pop | @ivar input: the OpCode we encapsulate
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76 | ea03467c | Iustin Pop | @ivar status: the current status
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77 | ea03467c | Iustin Pop | @ivar result: the result of the LU execution
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78 | ea03467c | Iustin Pop | @ivar start_timestamp: timestamp for the start of the execution
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79 | ea03467c | Iustin Pop | @ivar stop_timestamp: timestamp for the end of the execution
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80 | f1048938 | Iustin Pop |
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81 | e2715f69 | Michael Hanselmann | """
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82 | 85f03e0d | Michael Hanselmann | def __init__(self, op): |
83 | ea03467c | Iustin Pop | """Constructor for the _QuededOpCode.
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84 | ea03467c | Iustin Pop |
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85 | ea03467c | Iustin Pop | @type op: L{opcodes.OpCode}
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86 | ea03467c | Iustin Pop | @param op: the opcode we encapsulate
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87 | ea03467c | Iustin Pop |
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88 | ea03467c | Iustin Pop | """
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89 | 85f03e0d | Michael Hanselmann | self.input = op
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90 | 85f03e0d | Michael Hanselmann | self.status = constants.OP_STATUS_QUEUED
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91 | 85f03e0d | Michael Hanselmann | self.result = None |
92 | 85f03e0d | Michael Hanselmann | self.log = []
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93 | 70552c46 | Michael Hanselmann | self.start_timestamp = None |
94 | 70552c46 | Michael Hanselmann | self.end_timestamp = None |
95 | f1da30e6 | Michael Hanselmann | |
96 | f1da30e6 | Michael Hanselmann | @classmethod
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97 | f1da30e6 | Michael Hanselmann | def Restore(cls, state): |
98 | ea03467c | Iustin Pop | """Restore the _QueuedOpCode from the serialized form.
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99 | ea03467c | Iustin Pop |
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100 | ea03467c | Iustin Pop | @type state: dict
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101 | ea03467c | Iustin Pop | @param state: the serialized state
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102 | ea03467c | Iustin Pop | @rtype: _QueuedOpCode
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103 | ea03467c | Iustin Pop | @return: a new _QueuedOpCode instance
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104 | ea03467c | Iustin Pop |
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105 | ea03467c | Iustin Pop | """
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106 | 85f03e0d | Michael Hanselmann | obj = _QueuedOpCode.__new__(cls) |
107 | 85f03e0d | Michael Hanselmann | obj.input = opcodes.OpCode.LoadOpCode(state["input"])
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108 | 85f03e0d | Michael Hanselmann | obj.status = state["status"]
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109 | 85f03e0d | Michael Hanselmann | obj.result = state["result"]
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110 | 85f03e0d | Michael Hanselmann | obj.log = state["log"]
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111 | 70552c46 | Michael Hanselmann | obj.start_timestamp = state.get("start_timestamp", None) |
112 | 70552c46 | Michael Hanselmann | obj.end_timestamp = state.get("end_timestamp", None) |
113 | f1da30e6 | Michael Hanselmann | return obj
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114 | f1da30e6 | Michael Hanselmann | |
115 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
116 | ea03467c | Iustin Pop | """Serializes this _QueuedOpCode.
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117 | ea03467c | Iustin Pop |
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118 | ea03467c | Iustin Pop | @rtype: dict
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119 | ea03467c | Iustin Pop | @return: the dictionary holding the serialized state
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120 | ea03467c | Iustin Pop |
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121 | ea03467c | Iustin Pop | """
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122 | 6c5a7090 | Michael Hanselmann | return {
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123 | 6c5a7090 | Michael Hanselmann | "input": self.input.__getstate__(), |
124 | 6c5a7090 | Michael Hanselmann | "status": self.status, |
125 | 6c5a7090 | Michael Hanselmann | "result": self.result, |
126 | 6c5a7090 | Michael Hanselmann | "log": self.log, |
127 | 70552c46 | Michael Hanselmann | "start_timestamp": self.start_timestamp, |
128 | 70552c46 | Michael Hanselmann | "end_timestamp": self.end_timestamp, |
129 | 6c5a7090 | Michael Hanselmann | } |
130 | f1048938 | Iustin Pop | |
131 | e2715f69 | Michael Hanselmann | |
132 | e2715f69 | Michael Hanselmann | class _QueuedJob(object): |
133 | e2715f69 | Michael Hanselmann | """In-memory job representation.
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134 | e2715f69 | Michael Hanselmann |
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135 | ea03467c | Iustin Pop | This is what we use to track the user-submitted jobs. Locking must
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136 | ea03467c | Iustin Pop | be taken care of by users of this class.
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137 | ea03467c | Iustin Pop |
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138 | ea03467c | Iustin Pop | @type queue: L{JobQueue}
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139 | ea03467c | Iustin Pop | @ivar queue: the parent queue
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140 | ea03467c | Iustin Pop | @ivar id: the job ID
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141 | ea03467c | Iustin Pop | @type ops: list
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142 | ea03467c | Iustin Pop | @ivar ops: the list of _QueuedOpCode that constitute the job
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143 | ea03467c | Iustin Pop | @type run_op_index: int
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144 | ea03467c | Iustin Pop | @ivar run_op_index: the currently executing opcode, or -1 if
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145 | ea03467c | Iustin Pop | we didn't yet start executing
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146 | ea03467c | Iustin Pop | @type log_serial: int
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147 | ea03467c | Iustin Pop | @ivar log_serial: holds the index for the next log entry
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148 | ea03467c | Iustin Pop | @ivar received_timestamp: the timestamp for when the job was received
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149 | ea03467c | Iustin Pop | @ivar start_timestmap: the timestamp for start of execution
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150 | ea03467c | Iustin Pop | @ivar end_timestamp: the timestamp for end of execution
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151 | ea03467c | Iustin Pop | @ivar change: a Condition variable we use for waiting for job changes
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152 | e2715f69 | Michael Hanselmann |
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153 | e2715f69 | Michael Hanselmann | """
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154 | 85f03e0d | Michael Hanselmann | def __init__(self, queue, job_id, ops): |
155 | ea03467c | Iustin Pop | """Constructor for the _QueuedJob.
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156 | ea03467c | Iustin Pop |
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157 | ea03467c | Iustin Pop | @type queue: L{JobQueue}
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158 | ea03467c | Iustin Pop | @param queue: our parent queue
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159 | ea03467c | Iustin Pop | @type job_id: job_id
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160 | ea03467c | Iustin Pop | @param job_id: our job id
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161 | ea03467c | Iustin Pop | @type ops: list
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162 | ea03467c | Iustin Pop | @param ops: the list of opcodes we hold, which will be encapsulated
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163 | ea03467c | Iustin Pop | in _QueuedOpCodes
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164 | ea03467c | Iustin Pop |
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165 | ea03467c | Iustin Pop | """
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166 | e2715f69 | Michael Hanselmann | if not ops: |
167 | ea03467c | Iustin Pop | # TODO: use a better exception
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168 | e2715f69 | Michael Hanselmann | raise Exception("No opcodes") |
169 | e2715f69 | Michael Hanselmann | |
170 | 85f03e0d | Michael Hanselmann | self.queue = queue
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171 | f1da30e6 | Michael Hanselmann | self.id = job_id
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172 | 85f03e0d | Michael Hanselmann | self.ops = [_QueuedOpCode(op) for op in ops] |
173 | 85f03e0d | Michael Hanselmann | self.run_op_index = -1 |
174 | 6c5a7090 | Michael Hanselmann | self.log_serial = 0 |
175 | c56ec146 | Iustin Pop | self.received_timestamp = TimeStampNow()
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176 | c56ec146 | Iustin Pop | self.start_timestamp = None |
177 | c56ec146 | Iustin Pop | self.end_timestamp = None |
178 | 6c5a7090 | Michael Hanselmann | |
179 | 6c5a7090 | Michael Hanselmann | # Condition to wait for changes
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180 | 6c5a7090 | Michael Hanselmann | self.change = threading.Condition(self.queue._lock) |
181 | f1da30e6 | Michael Hanselmann | |
182 | f1da30e6 | Michael Hanselmann | @classmethod
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183 | 85f03e0d | Michael Hanselmann | def Restore(cls, queue, state): |
184 | ea03467c | Iustin Pop | """Restore a _QueuedJob from serialized state:
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185 | ea03467c | Iustin Pop |
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186 | ea03467c | Iustin Pop | @type queue: L{JobQueue}
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187 | ea03467c | Iustin Pop | @param queue: to which queue the restored job belongs
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188 | ea03467c | Iustin Pop | @type state: dict
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189 | ea03467c | Iustin Pop | @param state: the serialized state
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190 | ea03467c | Iustin Pop | @rtype: _JobQueue
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191 | ea03467c | Iustin Pop | @return: the restored _JobQueue instance
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192 | ea03467c | Iustin Pop |
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193 | ea03467c | Iustin Pop | """
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194 | 85f03e0d | Michael Hanselmann | obj = _QueuedJob.__new__(cls) |
195 | 85f03e0d | Michael Hanselmann | obj.queue = queue |
196 | 85f03e0d | Michael Hanselmann | obj.id = state["id"]
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197 | 85f03e0d | Michael Hanselmann | obj.run_op_index = state["run_op_index"]
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198 | c56ec146 | Iustin Pop | obj.received_timestamp = state.get("received_timestamp", None) |
199 | c56ec146 | Iustin Pop | obj.start_timestamp = state.get("start_timestamp", None) |
200 | c56ec146 | Iustin Pop | obj.end_timestamp = state.get("end_timestamp", None) |
201 | 6c5a7090 | Michael Hanselmann | |
202 | 6c5a7090 | Michael Hanselmann | obj.ops = [] |
203 | 6c5a7090 | Michael Hanselmann | obj.log_serial = 0
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204 | 6c5a7090 | Michael Hanselmann | for op_state in state["ops"]: |
205 | 6c5a7090 | Michael Hanselmann | op = _QueuedOpCode.Restore(op_state) |
206 | 6c5a7090 | Michael Hanselmann | for log_entry in op.log: |
207 | 6c5a7090 | Michael Hanselmann | obj.log_serial = max(obj.log_serial, log_entry[0]) |
208 | 6c5a7090 | Michael Hanselmann | obj.ops.append(op) |
209 | 6c5a7090 | Michael Hanselmann | |
210 | 6c5a7090 | Michael Hanselmann | # Condition to wait for changes
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211 | 6c5a7090 | Michael Hanselmann | obj.change = threading.Condition(obj.queue._lock) |
212 | 6c5a7090 | Michael Hanselmann | |
213 | f1da30e6 | Michael Hanselmann | return obj
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214 | f1da30e6 | Michael Hanselmann | |
215 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
216 | ea03467c | Iustin Pop | """Serialize the _JobQueue instance.
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217 | ea03467c | Iustin Pop |
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218 | ea03467c | Iustin Pop | @rtype: dict
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219 | ea03467c | Iustin Pop | @return: the serialized state
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220 | ea03467c | Iustin Pop |
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221 | ea03467c | Iustin Pop | """
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222 | f1da30e6 | Michael Hanselmann | return {
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223 | f1da30e6 | Michael Hanselmann | "id": self.id, |
224 | 85f03e0d | Michael Hanselmann | "ops": [op.Serialize() for op in self.ops], |
225 | f1048938 | Iustin Pop | "run_op_index": self.run_op_index, |
226 | c56ec146 | Iustin Pop | "start_timestamp": self.start_timestamp, |
227 | c56ec146 | Iustin Pop | "end_timestamp": self.end_timestamp, |
228 | c56ec146 | Iustin Pop | "received_timestamp": self.received_timestamp, |
229 | f1da30e6 | Michael Hanselmann | } |
230 | f1da30e6 | Michael Hanselmann | |
231 | 85f03e0d | Michael Hanselmann | def CalcStatus(self): |
232 | ea03467c | Iustin Pop | """Compute the status of this job.
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233 | ea03467c | Iustin Pop |
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234 | ea03467c | Iustin Pop | This function iterates over all the _QueuedOpCodes in the job and
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235 | ea03467c | Iustin Pop | based on their status, computes the job status.
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236 | ea03467c | Iustin Pop |
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237 | ea03467c | Iustin Pop | The algorithm is:
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238 | ea03467c | Iustin Pop | - if we find a cancelled, or finished with error, the job
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239 | ea03467c | Iustin Pop | status will be the same
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240 | ea03467c | Iustin Pop | - otherwise, the last opcode with the status one of:
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241 | ea03467c | Iustin Pop | - waitlock
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242 | fbf0262f | Michael Hanselmann | - canceling
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243 | ea03467c | Iustin Pop | - running
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244 | ea03467c | Iustin Pop |
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245 | ea03467c | Iustin Pop | will determine the job status
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246 | ea03467c | Iustin Pop |
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247 | ea03467c | Iustin Pop | - otherwise, it means either all opcodes are queued, or success,
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248 | ea03467c | Iustin Pop | and the job status will be the same
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249 | ea03467c | Iustin Pop |
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250 | ea03467c | Iustin Pop | @return: the job status
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251 | ea03467c | Iustin Pop |
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252 | ea03467c | Iustin Pop | """
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253 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_QUEUED |
254 | e2715f69 | Michael Hanselmann | |
255 | e2715f69 | Michael Hanselmann | all_success = True
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256 | 85f03e0d | Michael Hanselmann | for op in self.ops: |
257 | 85f03e0d | Michael Hanselmann | if op.status == constants.OP_STATUS_SUCCESS:
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258 | e2715f69 | Michael Hanselmann | continue
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259 | e2715f69 | Michael Hanselmann | |
260 | e2715f69 | Michael Hanselmann | all_success = False
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261 | e2715f69 | Michael Hanselmann | |
262 | 85f03e0d | Michael Hanselmann | if op.status == constants.OP_STATUS_QUEUED:
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263 | e2715f69 | Michael Hanselmann | pass
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264 | e92376d7 | Iustin Pop | elif op.status == constants.OP_STATUS_WAITLOCK:
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265 | e92376d7 | Iustin Pop | status = constants.JOB_STATUS_WAITLOCK |
266 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_RUNNING:
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267 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_RUNNING |
268 | fbf0262f | Michael Hanselmann | elif op.status == constants.OP_STATUS_CANCELING:
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269 | fbf0262f | Michael Hanselmann | status = constants.JOB_STATUS_CANCELING |
270 | fbf0262f | Michael Hanselmann | break
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271 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_ERROR:
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272 | f1da30e6 | Michael Hanselmann | status = constants.JOB_STATUS_ERROR |
273 | f1da30e6 | Michael Hanselmann | # The whole job fails if one opcode failed
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274 | f1da30e6 | Michael Hanselmann | break
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275 | 85f03e0d | Michael Hanselmann | elif op.status == constants.OP_STATUS_CANCELED:
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276 | 4cb1d919 | Michael Hanselmann | status = constants.OP_STATUS_CANCELED |
277 | 4cb1d919 | Michael Hanselmann | break
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278 | e2715f69 | Michael Hanselmann | |
279 | e2715f69 | Michael Hanselmann | if all_success:
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280 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_SUCCESS |
281 | e2715f69 | Michael Hanselmann | |
282 | e2715f69 | Michael Hanselmann | return status
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283 | e2715f69 | Michael Hanselmann | |
284 | 6c5a7090 | Michael Hanselmann | def GetLogEntries(self, newer_than): |
285 | ea03467c | Iustin Pop | """Selectively returns the log entries.
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286 | ea03467c | Iustin Pop |
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287 | ea03467c | Iustin Pop | @type newer_than: None or int
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288 | ea03467c | Iustin Pop | @param newer_than: if this is None, return all log enties,
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289 | ea03467c | Iustin Pop | otherwise return only the log entries with serial higher
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290 | ea03467c | Iustin Pop | than this value
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291 | ea03467c | Iustin Pop | @rtype: list
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292 | ea03467c | Iustin Pop | @return: the list of the log entries selected
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293 | ea03467c | Iustin Pop |
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294 | ea03467c | Iustin Pop | """
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295 | 6c5a7090 | Michael Hanselmann | if newer_than is None: |
296 | 6c5a7090 | Michael Hanselmann | serial = -1
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297 | 6c5a7090 | Michael Hanselmann | else:
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298 | 6c5a7090 | Michael Hanselmann | serial = newer_than |
299 | 6c5a7090 | Michael Hanselmann | |
300 | 6c5a7090 | Michael Hanselmann | entries = [] |
301 | 6c5a7090 | Michael Hanselmann | for op in self.ops: |
302 | 63712a09 | Iustin Pop | entries.extend(filter(lambda entry: entry[0] > serial, op.log)) |
303 | 6c5a7090 | Michael Hanselmann | |
304 | 6c5a7090 | Michael Hanselmann | return entries
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305 | 6c5a7090 | Michael Hanselmann | |
306 | f1048938 | Iustin Pop | |
307 | 85f03e0d | Michael Hanselmann | class _JobQueueWorker(workerpool.BaseWorker): |
308 | ea03467c | Iustin Pop | """The actual job workers.
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309 | ea03467c | Iustin Pop |
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310 | ea03467c | Iustin Pop | """
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311 | e92376d7 | Iustin Pop | def _NotifyStart(self): |
312 | e92376d7 | Iustin Pop | """Mark the opcode as running, not lock-waiting.
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313 | e92376d7 | Iustin Pop |
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314 | e92376d7 | Iustin Pop | This is called from the mcpu code as a notifier function, when the
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315 | e92376d7 | Iustin Pop | LU is finally about to start the Exec() method. Of course, to have
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316 | e92376d7 | Iustin Pop | end-user visible results, the opcode must be initially (before
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317 | e92376d7 | Iustin Pop | calling into Processor.ExecOpCode) set to OP_STATUS_WAITLOCK.
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318 | e92376d7 | Iustin Pop |
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319 | e92376d7 | Iustin Pop | """
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320 | e92376d7 | Iustin Pop | assert self.queue, "Queue attribute is missing" |
321 | e92376d7 | Iustin Pop | assert self.opcode, "Opcode attribute is missing" |
322 | e92376d7 | Iustin Pop | |
323 | e92376d7 | Iustin Pop | self.queue.acquire()
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324 | e92376d7 | Iustin Pop | try:
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325 | fbf0262f | Michael Hanselmann | assert self.opcode.status in (constants.OP_STATUS_WAITLOCK, |
326 | fbf0262f | Michael Hanselmann | constants.OP_STATUS_CANCELING) |
327 | fbf0262f | Michael Hanselmann | |
328 | fbf0262f | Michael Hanselmann | # Cancel here if we were asked to
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329 | fbf0262f | Michael Hanselmann | if self.opcode.status == constants.OP_STATUS_CANCELING: |
330 | fbf0262f | Michael Hanselmann | raise CancelJob()
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331 | fbf0262f | Michael Hanselmann | |
332 | e92376d7 | Iustin Pop | self.opcode.status = constants.OP_STATUS_RUNNING
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333 | e92376d7 | Iustin Pop | finally:
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334 | e92376d7 | Iustin Pop | self.queue.release()
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335 | e92376d7 | Iustin Pop | |
336 | 85f03e0d | Michael Hanselmann | def RunTask(self, job): |
337 | e2715f69 | Michael Hanselmann | """Job executor.
|
338 | e2715f69 | Michael Hanselmann |
|
339 | 6c5a7090 | Michael Hanselmann | This functions processes a job. It is closely tied to the _QueuedJob and
|
340 | 6c5a7090 | Michael Hanselmann | _QueuedOpCode classes.
|
341 | e2715f69 | Michael Hanselmann |
|
342 | ea03467c | Iustin Pop | @type job: L{_QueuedJob}
|
343 | ea03467c | Iustin Pop | @param job: the job to be processed
|
344 | ea03467c | Iustin Pop |
|
345 | e2715f69 | Michael Hanselmann | """
|
346 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s processing job %s",
|
347 | e2715f69 | Michael Hanselmann | self.worker_id, job.id)
|
348 | 5bdce580 | Michael Hanselmann | proc = mcpu.Processor(self.pool.queue.context)
|
349 | e92376d7 | Iustin Pop | self.queue = queue = job.queue
|
350 | e2715f69 | Michael Hanselmann | try:
|
351 | 85f03e0d | Michael Hanselmann | try:
|
352 | 85f03e0d | Michael Hanselmann | count = len(job.ops)
|
353 | 85f03e0d | Michael Hanselmann | for idx, op in enumerate(job.ops): |
354 | 85f03e0d | Michael Hanselmann | try:
|
355 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Starting %s", idx + 1, count, op) |
356 | 85f03e0d | Michael Hanselmann | |
357 | 85f03e0d | Michael Hanselmann | queue.acquire() |
358 | 85f03e0d | Michael Hanselmann | try:
|
359 | fbf0262f | Michael Hanselmann | assert op.status == constants.OP_STATUS_QUEUED
|
360 | 85f03e0d | Michael Hanselmann | job.run_op_index = idx |
361 | e92376d7 | Iustin Pop | op.status = constants.OP_STATUS_WAITLOCK |
362 | 85f03e0d | Michael Hanselmann | op.result = None
|
363 | 70552c46 | Michael Hanselmann | op.start_timestamp = TimeStampNow() |
364 | c56ec146 | Iustin Pop | if idx == 0: # first opcode |
365 | c56ec146 | Iustin Pop | job.start_timestamp = op.start_timestamp |
366 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
367 | 85f03e0d | Michael Hanselmann | |
368 | 38206f3c | Iustin Pop | input_opcode = op.input |
369 | 85f03e0d | Michael Hanselmann | finally:
|
370 | 85f03e0d | Michael Hanselmann | queue.release() |
371 | 85f03e0d | Michael Hanselmann | |
372 | dfe57c22 | Michael Hanselmann | def _Log(*args): |
373 | 6c5a7090 | Michael Hanselmann | """Append a log entry.
|
374 | 6c5a7090 | Michael Hanselmann |
|
375 | 6c5a7090 | Michael Hanselmann | """
|
376 | 6c5a7090 | Michael Hanselmann | assert len(args) < 3 |
377 | 6c5a7090 | Michael Hanselmann | |
378 | 6c5a7090 | Michael Hanselmann | if len(args) == 1: |
379 | 6c5a7090 | Michael Hanselmann | log_type = constants.ELOG_MESSAGE |
380 | 6c5a7090 | Michael Hanselmann | log_msg = args[0]
|
381 | 6c5a7090 | Michael Hanselmann | else:
|
382 | 6c5a7090 | Michael Hanselmann | log_type, log_msg = args |
383 | 6c5a7090 | Michael Hanselmann | |
384 | 6c5a7090 | Michael Hanselmann | # The time is split to make serialization easier and not lose
|
385 | 6c5a7090 | Michael Hanselmann | # precision.
|
386 | 6c5a7090 | Michael Hanselmann | timestamp = utils.SplitTime(time.time()) |
387 | dfe57c22 | Michael Hanselmann | |
388 | 6c5a7090 | Michael Hanselmann | queue.acquire() |
389 | dfe57c22 | Michael Hanselmann | try:
|
390 | 6c5a7090 | Michael Hanselmann | job.log_serial += 1
|
391 | 6c5a7090 | Michael Hanselmann | op.log.append((job.log_serial, timestamp, log_type, log_msg)) |
392 | 6c5a7090 | Michael Hanselmann | |
393 | dfe57c22 | Michael Hanselmann | job.change.notifyAll() |
394 | dfe57c22 | Michael Hanselmann | finally:
|
395 | 6c5a7090 | Michael Hanselmann | queue.release() |
396 | dfe57c22 | Michael Hanselmann | |
397 | 6c5a7090 | Michael Hanselmann | # Make sure not to hold lock while _Log is called
|
398 | e92376d7 | Iustin Pop | self.opcode = op
|
399 | e92376d7 | Iustin Pop | result = proc.ExecOpCode(input_opcode, _Log, self._NotifyStart)
|
400 | 85f03e0d | Michael Hanselmann | |
401 | 85f03e0d | Michael Hanselmann | queue.acquire() |
402 | 85f03e0d | Michael Hanselmann | try:
|
403 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_SUCCESS |
404 | 85f03e0d | Michael Hanselmann | op.result = result |
405 | 70552c46 | Michael Hanselmann | op.end_timestamp = TimeStampNow() |
406 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
407 | 85f03e0d | Michael Hanselmann | finally:
|
408 | 85f03e0d | Michael Hanselmann | queue.release() |
409 | 85f03e0d | Michael Hanselmann | |
410 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Successfully finished %s",
|
411 | 85f03e0d | Michael Hanselmann | idx + 1, count, op)
|
412 | fbf0262f | Michael Hanselmann | except CancelJob:
|
413 | fbf0262f | Michael Hanselmann | # Will be handled further up
|
414 | fbf0262f | Michael Hanselmann | raise
|
415 | 85f03e0d | Michael Hanselmann | except Exception, err: |
416 | 85f03e0d | Michael Hanselmann | queue.acquire() |
417 | 85f03e0d | Michael Hanselmann | try:
|
418 | 85f03e0d | Michael Hanselmann | try:
|
419 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
420 | 85f03e0d | Michael Hanselmann | op.result = str(err)
|
421 | 70552c46 | Michael Hanselmann | op.end_timestamp = TimeStampNow() |
422 | 85f03e0d | Michael Hanselmann | logging.debug("Op %s/%s: Error in %s", idx + 1, count, op) |
423 | 85f03e0d | Michael Hanselmann | finally:
|
424 | 85f03e0d | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
425 | 85f03e0d | Michael Hanselmann | finally:
|
426 | 85f03e0d | Michael Hanselmann | queue.release() |
427 | 85f03e0d | Michael Hanselmann | raise
|
428 | 85f03e0d | Michael Hanselmann | |
429 | fbf0262f | Michael Hanselmann | except CancelJob:
|
430 | fbf0262f | Michael Hanselmann | queue.acquire() |
431 | fbf0262f | Michael Hanselmann | try:
|
432 | fbf0262f | Michael Hanselmann | queue.CancelJobUnlocked(job) |
433 | fbf0262f | Michael Hanselmann | finally:
|
434 | fbf0262f | Michael Hanselmann | queue.release() |
435 | 85f03e0d | Michael Hanselmann | except errors.GenericError, err:
|
436 | 85f03e0d | Michael Hanselmann | logging.exception("Ganeti exception")
|
437 | 85f03e0d | Michael Hanselmann | except:
|
438 | 85f03e0d | Michael Hanselmann | logging.exception("Unhandled exception")
|
439 | e2715f69 | Michael Hanselmann | finally:
|
440 | 85f03e0d | Michael Hanselmann | queue.acquire() |
441 | 85f03e0d | Michael Hanselmann | try:
|
442 | 65548ed5 | Michael Hanselmann | try:
|
443 | 65548ed5 | Michael Hanselmann | job.run_op_idx = -1
|
444 | c56ec146 | Iustin Pop | job.end_timestamp = TimeStampNow() |
445 | 65548ed5 | Michael Hanselmann | queue.UpdateJobUnlocked(job) |
446 | 65548ed5 | Michael Hanselmann | finally:
|
447 | 65548ed5 | Michael Hanselmann | job_id = job.id |
448 | 65548ed5 | Michael Hanselmann | status = job.CalcStatus() |
449 | 85f03e0d | Michael Hanselmann | finally:
|
450 | 85f03e0d | Michael Hanselmann | queue.release() |
451 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s finished job %s, status = %s",
|
452 | 85f03e0d | Michael Hanselmann | self.worker_id, job_id, status)
|
453 | e2715f69 | Michael Hanselmann | |
454 | e2715f69 | Michael Hanselmann | |
455 | e2715f69 | Michael Hanselmann | class _JobQueueWorkerPool(workerpool.WorkerPool): |
456 | ea03467c | Iustin Pop | """Simple class implementing a job-processing workerpool.
|
457 | ea03467c | Iustin Pop |
|
458 | ea03467c | Iustin Pop | """
|
459 | 5bdce580 | Michael Hanselmann | def __init__(self, queue): |
460 | e2715f69 | Michael Hanselmann | super(_JobQueueWorkerPool, self).__init__(JOBQUEUE_THREADS, |
461 | e2715f69 | Michael Hanselmann | _JobQueueWorker) |
462 | 5bdce580 | Michael Hanselmann | self.queue = queue
|
463 | e2715f69 | Michael Hanselmann | |
464 | e2715f69 | Michael Hanselmann | |
465 | 85f03e0d | Michael Hanselmann | class JobQueue(object): |
466 | ea03467c | Iustin Pop | """Quue used to manaage the jobs.
|
467 | ea03467c | Iustin Pop |
|
468 | ea03467c | Iustin Pop | @cvar _RE_JOB_FILE: regex matching the valid job file names
|
469 | ea03467c | Iustin Pop |
|
470 | ea03467c | Iustin Pop | """
|
471 | bac5ffc3 | Oleksiy Mishchenko | _RE_JOB_FILE = re.compile(r"^job-(%s)$" % constants.JOB_ID_TEMPLATE)
|
472 | f1da30e6 | Michael Hanselmann | |
473 | db37da70 | Michael Hanselmann | def _RequireOpenQueue(fn): |
474 | db37da70 | Michael Hanselmann | """Decorator for "public" functions.
|
475 | db37da70 | Michael Hanselmann |
|
476 | ea03467c | Iustin Pop | This function should be used for all 'public' functions. That is,
|
477 | ea03467c | Iustin Pop | functions usually called from other classes.
|
478 | db37da70 | Michael Hanselmann |
|
479 | ea03467c | Iustin Pop | @warning: Use this decorator only after utils.LockedMethod!
|
480 | db37da70 | Michael Hanselmann |
|
481 | ea03467c | Iustin Pop | Example::
|
482 | db37da70 | Michael Hanselmann | @utils.LockedMethod
|
483 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
484 | db37da70 | Michael Hanselmann | def Example(self):
|
485 | db37da70 | Michael Hanselmann | pass
|
486 | db37da70 | Michael Hanselmann |
|
487 | db37da70 | Michael Hanselmann | """
|
488 | db37da70 | Michael Hanselmann | def wrapper(self, *args, **kwargs): |
489 | 04ab05ce | Michael Hanselmann | assert self._queue_lock is not None, "Queue should be open" |
490 | db37da70 | Michael Hanselmann | return fn(self, *args, **kwargs) |
491 | db37da70 | Michael Hanselmann | return wrapper
|
492 | db37da70 | Michael Hanselmann | |
493 | 85f03e0d | Michael Hanselmann | def __init__(self, context): |
494 | ea03467c | Iustin Pop | """Constructor for JobQueue.
|
495 | ea03467c | Iustin Pop |
|
496 | ea03467c | Iustin Pop | The constructor will initialize the job queue object and then
|
497 | ea03467c | Iustin Pop | start loading the current jobs from disk, either for starting them
|
498 | ea03467c | Iustin Pop | (if they were queue) or for aborting them (if they were already
|
499 | ea03467c | Iustin Pop | running).
|
500 | ea03467c | Iustin Pop |
|
501 | ea03467c | Iustin Pop | @type context: GanetiContext
|
502 | ea03467c | Iustin Pop | @param context: the context object for access to the configuration
|
503 | ea03467c | Iustin Pop | data and other ganeti objects
|
504 | ea03467c | Iustin Pop |
|
505 | ea03467c | Iustin Pop | """
|
506 | 5bdce580 | Michael Hanselmann | self.context = context
|
507 | 5685c1a5 | Michael Hanselmann | self._memcache = weakref.WeakValueDictionary()
|
508 | c3f0a12f | Iustin Pop | self._my_hostname = utils.HostInfo().name
|
509 | f1da30e6 | Michael Hanselmann | |
510 | 85f03e0d | Michael Hanselmann | # Locking
|
511 | 85f03e0d | Michael Hanselmann | self._lock = threading.Lock()
|
512 | 85f03e0d | Michael Hanselmann | self.acquire = self._lock.acquire |
513 | 85f03e0d | Michael Hanselmann | self.release = self._lock.release |
514 | 85f03e0d | Michael Hanselmann | |
515 | 04ab05ce | Michael Hanselmann | # Initialize
|
516 | 5d6fb8eb | Michael Hanselmann | self._queue_lock = jstore.InitAndVerifyQueue(must_lock=True) |
517 | f1da30e6 | Michael Hanselmann | |
518 | 04ab05ce | Michael Hanselmann | # Read serial file
|
519 | 04ab05ce | Michael Hanselmann | self._last_serial = jstore.ReadSerial()
|
520 | 04ab05ce | Michael Hanselmann | assert self._last_serial is not None, ("Serial file was modified between" |
521 | 04ab05ce | Michael Hanselmann | " check in jstore and here")
|
522 | c4beba1c | Iustin Pop | |
523 | 23752136 | Michael Hanselmann | # Get initial list of nodes
|
524 | 99aabbed | Iustin Pop | self._nodes = dict((n.name, n.primary_ip) |
525 | 59303563 | Iustin Pop | for n in self.context.cfg.GetAllNodesInfo().values() |
526 | 59303563 | Iustin Pop | if n.master_candidate)
|
527 | 8e00939c | Michael Hanselmann | |
528 | 8e00939c | Michael Hanselmann | # Remove master node
|
529 | 8e00939c | Michael Hanselmann | try:
|
530 | 99aabbed | Iustin Pop | del self._nodes[self._my_hostname] |
531 | 33987705 | Iustin Pop | except KeyError: |
532 | 8e00939c | Michael Hanselmann | pass
|
533 | 23752136 | Michael Hanselmann | |
534 | 23752136 | Michael Hanselmann | # TODO: Check consistency across nodes
|
535 | 23752136 | Michael Hanselmann | |
536 | 85f03e0d | Michael Hanselmann | # Setup worker pool
|
537 | 5bdce580 | Michael Hanselmann | self._wpool = _JobQueueWorkerPool(self) |
538 | 85f03e0d | Michael Hanselmann | try:
|
539 | 16714921 | Michael Hanselmann | # We need to lock here because WorkerPool.AddTask() may start a job while
|
540 | 16714921 | Michael Hanselmann | # we're still doing our work.
|
541 | 16714921 | Michael Hanselmann | self.acquire()
|
542 | 16714921 | Michael Hanselmann | try:
|
543 | 711b5124 | Michael Hanselmann | logging.info("Inspecting job queue")
|
544 | 711b5124 | Michael Hanselmann | |
545 | 711b5124 | Michael Hanselmann | all_job_ids = self._GetJobIDsUnlocked()
|
546 | b7cb9024 | Michael Hanselmann | jobs_count = len(all_job_ids)
|
547 | 711b5124 | Michael Hanselmann | lastinfo = time.time() |
548 | 711b5124 | Michael Hanselmann | for idx, job_id in enumerate(all_job_ids): |
549 | 711b5124 | Michael Hanselmann | # Give an update every 1000 jobs or 10 seconds
|
550 | b7cb9024 | Michael Hanselmann | if (idx % 1000 == 0 or time.time() >= (lastinfo + 10.0) or |
551 | b7cb9024 | Michael Hanselmann | idx == (jobs_count - 1)):
|
552 | 711b5124 | Michael Hanselmann | logging.info("Job queue inspection: %d/%d (%0.1f %%)",
|
553 | b7cb9024 | Michael Hanselmann | idx, jobs_count - 1, 100.0 * (idx + 1) / jobs_count) |
554 | 711b5124 | Michael Hanselmann | lastinfo = time.time() |
555 | 711b5124 | Michael Hanselmann | |
556 | 711b5124 | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
557 | 711b5124 | Michael Hanselmann | |
558 | 16714921 | Michael Hanselmann | # a failure in loading the job can cause 'None' to be returned
|
559 | 16714921 | Michael Hanselmann | if job is None: |
560 | 16714921 | Michael Hanselmann | continue
|
561 | 94ed59a5 | Iustin Pop | |
562 | 16714921 | Michael Hanselmann | status = job.CalcStatus() |
563 | 85f03e0d | Michael Hanselmann | |
564 | 16714921 | Michael Hanselmann | if status in (constants.JOB_STATUS_QUEUED, ): |
565 | 16714921 | Michael Hanselmann | self._wpool.AddTask(job)
|
566 | 85f03e0d | Michael Hanselmann | |
567 | 16714921 | Michael Hanselmann | elif status in (constants.JOB_STATUS_RUNNING, |
568 | fbf0262f | Michael Hanselmann | constants.JOB_STATUS_WAITLOCK, |
569 | fbf0262f | Michael Hanselmann | constants.JOB_STATUS_CANCELING): |
570 | 16714921 | Michael Hanselmann | logging.warning("Unfinished job %s found: %s", job.id, job)
|
571 | 16714921 | Michael Hanselmann | try:
|
572 | 16714921 | Michael Hanselmann | for op in job.ops: |
573 | 16714921 | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
574 | 16714921 | Michael Hanselmann | op.result = "Unclean master daemon shutdown"
|
575 | 16714921 | Michael Hanselmann | finally:
|
576 | 16714921 | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
577 | 711b5124 | Michael Hanselmann | |
578 | 711b5124 | Michael Hanselmann | logging.info("Job queue inspection finished")
|
579 | 16714921 | Michael Hanselmann | finally:
|
580 | 16714921 | Michael Hanselmann | self.release()
|
581 | 16714921 | Michael Hanselmann | except:
|
582 | 16714921 | Michael Hanselmann | self._wpool.TerminateWorkers()
|
583 | 16714921 | Michael Hanselmann | raise
|
584 | 85f03e0d | Michael Hanselmann | |
585 | d2e03a33 | Michael Hanselmann | @utils.LockedMethod
|
586 | d2e03a33 | Michael Hanselmann | @_RequireOpenQueue
|
587 | 99aabbed | Iustin Pop | def AddNode(self, node): |
588 | 99aabbed | Iustin Pop | """Register a new node with the queue.
|
589 | 99aabbed | Iustin Pop |
|
590 | 99aabbed | Iustin Pop | @type node: L{objects.Node}
|
591 | 99aabbed | Iustin Pop | @param node: the node object to be added
|
592 | 99aabbed | Iustin Pop |
|
593 | 99aabbed | Iustin Pop | """
|
594 | 99aabbed | Iustin Pop | node_name = node.name |
595 | d2e03a33 | Michael Hanselmann | assert node_name != self._my_hostname |
596 | 23752136 | Michael Hanselmann | |
597 | 9f774ee8 | Michael Hanselmann | # Clean queue directory on added node
|
598 | a3811745 | Michael Hanselmann | rpc.RpcRunner.call_jobqueue_purge(node_name) |
599 | 23752136 | Michael Hanselmann | |
600 | 59303563 | Iustin Pop | if not node.master_candidate: |
601 | 59303563 | Iustin Pop | # remove if existing, ignoring errors
|
602 | 59303563 | Iustin Pop | self._nodes.pop(node_name, None) |
603 | 59303563 | Iustin Pop | # and skip the replication of the job ids
|
604 | 59303563 | Iustin Pop | return
|
605 | 59303563 | Iustin Pop | |
606 | d2e03a33 | Michael Hanselmann | # Upload the whole queue excluding archived jobs
|
607 | d2e03a33 | Michael Hanselmann | files = [self._GetJobPath(job_id) for job_id in self._GetJobIDsUnlocked()] |
608 | 23752136 | Michael Hanselmann | |
609 | d2e03a33 | Michael Hanselmann | # Upload current serial file
|
610 | d2e03a33 | Michael Hanselmann | files.append(constants.JOB_QUEUE_SERIAL_FILE) |
611 | d2e03a33 | Michael Hanselmann | |
612 | d2e03a33 | Michael Hanselmann | for file_name in files: |
613 | 9f774ee8 | Michael Hanselmann | # Read file content
|
614 | 9f774ee8 | Michael Hanselmann | fd = open(file_name, "r") |
615 | 9f774ee8 | Michael Hanselmann | try:
|
616 | 9f774ee8 | Michael Hanselmann | content = fd.read() |
617 | 9f774ee8 | Michael Hanselmann | finally:
|
618 | 9f774ee8 | Michael Hanselmann | fd.close() |
619 | 9f774ee8 | Michael Hanselmann | |
620 | a3811745 | Michael Hanselmann | result = rpc.RpcRunner.call_jobqueue_update([node_name], |
621 | a3811745 | Michael Hanselmann | [node.primary_ip], |
622 | a3811745 | Michael Hanselmann | file_name, content) |
623 | d2e03a33 | Michael Hanselmann | if not result[node_name]: |
624 | d2e03a33 | Michael Hanselmann | logging.error("Failed to upload %s to %s", file_name, node_name)
|
625 | d2e03a33 | Michael Hanselmann | |
626 | 99aabbed | Iustin Pop | self._nodes[node_name] = node.primary_ip
|
627 | d2e03a33 | Michael Hanselmann | |
628 | d2e03a33 | Michael Hanselmann | @utils.LockedMethod
|
629 | d2e03a33 | Michael Hanselmann | @_RequireOpenQueue
|
630 | d2e03a33 | Michael Hanselmann | def RemoveNode(self, node_name): |
631 | ea03467c | Iustin Pop | """Callback called when removing nodes from the cluster.
|
632 | ea03467c | Iustin Pop |
|
633 | ea03467c | Iustin Pop | @type node_name: str
|
634 | ea03467c | Iustin Pop | @param node_name: the name of the node to remove
|
635 | ea03467c | Iustin Pop |
|
636 | ea03467c | Iustin Pop | """
|
637 | 23752136 | Michael Hanselmann | try:
|
638 | d2e03a33 | Michael Hanselmann | # The queue is removed by the "leave node" RPC call.
|
639 | 99aabbed | Iustin Pop | del self._nodes[node_name] |
640 | d2e03a33 | Michael Hanselmann | except KeyError: |
641 | 23752136 | Michael Hanselmann | pass
|
642 | 23752136 | Michael Hanselmann | |
643 | e74798c1 | Michael Hanselmann | def _CheckRpcResult(self, result, nodes, failmsg): |
644 | ea03467c | Iustin Pop | """Verifies the status of an RPC call.
|
645 | ea03467c | Iustin Pop |
|
646 | ea03467c | Iustin Pop | Since we aim to keep consistency should this node (the current
|
647 | ea03467c | Iustin Pop | master) fail, we will log errors if our rpc fail, and especially
|
648 | ea03467c | Iustin Pop | log the case when more than half of the nodes failes.
|
649 | ea03467c | Iustin Pop |
|
650 | ea03467c | Iustin Pop | @param result: the data as returned from the rpc call
|
651 | ea03467c | Iustin Pop | @type nodes: list
|
652 | ea03467c | Iustin Pop | @param nodes: the list of nodes we made the call to
|
653 | ea03467c | Iustin Pop | @type failmsg: str
|
654 | ea03467c | Iustin Pop | @param failmsg: the identifier to be used for logging
|
655 | ea03467c | Iustin Pop |
|
656 | ea03467c | Iustin Pop | """
|
657 | e74798c1 | Michael Hanselmann | failed = [] |
658 | e74798c1 | Michael Hanselmann | success = [] |
659 | e74798c1 | Michael Hanselmann | |
660 | e74798c1 | Michael Hanselmann | for node in nodes: |
661 | e74798c1 | Michael Hanselmann | if result[node]:
|
662 | e74798c1 | Michael Hanselmann | success.append(node) |
663 | e74798c1 | Michael Hanselmann | else:
|
664 | e74798c1 | Michael Hanselmann | failed.append(node) |
665 | e74798c1 | Michael Hanselmann | |
666 | e74798c1 | Michael Hanselmann | if failed:
|
667 | e74798c1 | Michael Hanselmann | logging.error("%s failed on %s", failmsg, ", ".join(failed)) |
668 | e74798c1 | Michael Hanselmann | |
669 | e74798c1 | Michael Hanselmann | # +1 for the master node
|
670 | e74798c1 | Michael Hanselmann | if (len(success) + 1) < len(failed): |
671 | e74798c1 | Michael Hanselmann | # TODO: Handle failing nodes
|
672 | e74798c1 | Michael Hanselmann | logging.error("More than half of the nodes failed")
|
673 | e74798c1 | Michael Hanselmann | |
674 | 99aabbed | Iustin Pop | def _GetNodeIp(self): |
675 | 99aabbed | Iustin Pop | """Helper for returning the node name/ip list.
|
676 | 99aabbed | Iustin Pop |
|
677 | ea03467c | Iustin Pop | @rtype: (list, list)
|
678 | ea03467c | Iustin Pop | @return: a tuple of two lists, the first one with the node
|
679 | ea03467c | Iustin Pop | names and the second one with the node addresses
|
680 | ea03467c | Iustin Pop |
|
681 | 99aabbed | Iustin Pop | """
|
682 | 99aabbed | Iustin Pop | name_list = self._nodes.keys()
|
683 | 99aabbed | Iustin Pop | addr_list = [self._nodes[name] for name in name_list] |
684 | 99aabbed | Iustin Pop | return name_list, addr_list
|
685 | 99aabbed | Iustin Pop | |
686 | 8e00939c | Michael Hanselmann | def _WriteAndReplicateFileUnlocked(self, file_name, data): |
687 | 8e00939c | Michael Hanselmann | """Writes a file locally and then replicates it to all nodes.
|
688 | 8e00939c | Michael Hanselmann |
|
689 | ea03467c | Iustin Pop | This function will replace the contents of a file on the local
|
690 | ea03467c | Iustin Pop | node and then replicate it to all the other nodes we have.
|
691 | ea03467c | Iustin Pop |
|
692 | ea03467c | Iustin Pop | @type file_name: str
|
693 | ea03467c | Iustin Pop | @param file_name: the path of the file to be replicated
|
694 | ea03467c | Iustin Pop | @type data: str
|
695 | ea03467c | Iustin Pop | @param data: the new contents of the file
|
696 | ea03467c | Iustin Pop |
|
697 | 8e00939c | Michael Hanselmann | """
|
698 | 8e00939c | Michael Hanselmann | utils.WriteFile(file_name, data=data) |
699 | 8e00939c | Michael Hanselmann | |
700 | 99aabbed | Iustin Pop | names, addrs = self._GetNodeIp()
|
701 | a3811745 | Michael Hanselmann | result = rpc.RpcRunner.call_jobqueue_update(names, addrs, file_name, data) |
702 | e74798c1 | Michael Hanselmann | self._CheckRpcResult(result, self._nodes, |
703 | e74798c1 | Michael Hanselmann | "Updating %s" % file_name)
|
704 | 23752136 | Michael Hanselmann | |
705 | abc1f2ce | Michael Hanselmann | def _RenameFileUnlocked(self, old, new): |
706 | ea03467c | Iustin Pop | """Renames a file locally and then replicate the change.
|
707 | ea03467c | Iustin Pop |
|
708 | ea03467c | Iustin Pop | This function will rename a file in the local queue directory
|
709 | ea03467c | Iustin Pop | and then replicate this rename to all the other nodes we have.
|
710 | ea03467c | Iustin Pop |
|
711 | ea03467c | Iustin Pop | @type old: str
|
712 | ea03467c | Iustin Pop | @param old: the current name of the file
|
713 | ea03467c | Iustin Pop | @type new: str
|
714 | ea03467c | Iustin Pop | @param new: the new name of the file
|
715 | ea03467c | Iustin Pop |
|
716 | ea03467c | Iustin Pop | """
|
717 | abc1f2ce | Michael Hanselmann | os.rename(old, new) |
718 | abc1f2ce | Michael Hanselmann | |
719 | 99aabbed | Iustin Pop | names, addrs = self._GetNodeIp()
|
720 | a3811745 | Michael Hanselmann | result = rpc.RpcRunner.call_jobqueue_rename(names, addrs, old, new) |
721 | e74798c1 | Michael Hanselmann | self._CheckRpcResult(result, self._nodes, |
722 | e74798c1 | Michael Hanselmann | "Moving %s to %s" % (old, new))
|
723 | abc1f2ce | Michael Hanselmann | |
724 | 85f03e0d | Michael Hanselmann | def _FormatJobID(self, job_id): |
725 | ea03467c | Iustin Pop | """Convert a job ID to string format.
|
726 | ea03467c | Iustin Pop |
|
727 | ea03467c | Iustin Pop | Currently this just does C{str(job_id)} after performing some
|
728 | ea03467c | Iustin Pop | checks, but if we want to change the job id format this will
|
729 | ea03467c | Iustin Pop | abstract this change.
|
730 | ea03467c | Iustin Pop |
|
731 | ea03467c | Iustin Pop | @type job_id: int or long
|
732 | ea03467c | Iustin Pop | @param job_id: the numeric job id
|
733 | ea03467c | Iustin Pop | @rtype: str
|
734 | ea03467c | Iustin Pop | @return: the formatted job id
|
735 | ea03467c | Iustin Pop |
|
736 | ea03467c | Iustin Pop | """
|
737 | 85f03e0d | Michael Hanselmann | if not isinstance(job_id, (int, long)): |
738 | 85f03e0d | Michael Hanselmann | raise errors.ProgrammerError("Job ID '%s' not numeric" % job_id) |
739 | 85f03e0d | Michael Hanselmann | if job_id < 0: |
740 | 85f03e0d | Michael Hanselmann | raise errors.ProgrammerError("Job ID %s is negative" % job_id) |
741 | 85f03e0d | Michael Hanselmann | |
742 | 85f03e0d | Michael Hanselmann | return str(job_id) |
743 | 85f03e0d | Michael Hanselmann | |
744 | 4c848b18 | Michael Hanselmann | def _NewSerialUnlocked(self): |
745 | f1da30e6 | Michael Hanselmann | """Generates a new job identifier.
|
746 | f1da30e6 | Michael Hanselmann |
|
747 | f1da30e6 | Michael Hanselmann | Job identifiers are unique during the lifetime of a cluster.
|
748 | f1da30e6 | Michael Hanselmann |
|
749 | ea03467c | Iustin Pop | @rtype: str
|
750 | ea03467c | Iustin Pop | @return: a string representing the job identifier.
|
751 | f1da30e6 | Michael Hanselmann |
|
752 | f1da30e6 | Michael Hanselmann | """
|
753 | f1da30e6 | Michael Hanselmann | # New number
|
754 | f1da30e6 | Michael Hanselmann | serial = self._last_serial + 1 |
755 | f1da30e6 | Michael Hanselmann | |
756 | f1da30e6 | Michael Hanselmann | # Write to file
|
757 | 23752136 | Michael Hanselmann | self._WriteAndReplicateFileUnlocked(constants.JOB_QUEUE_SERIAL_FILE,
|
758 | 23752136 | Michael Hanselmann | "%s\n" % serial)
|
759 | f1da30e6 | Michael Hanselmann | |
760 | f1da30e6 | Michael Hanselmann | # Keep it only if we were able to write the file
|
761 | f1da30e6 | Michael Hanselmann | self._last_serial = serial
|
762 | f1da30e6 | Michael Hanselmann | |
763 | 85f03e0d | Michael Hanselmann | return self._FormatJobID(serial) |
764 | f1da30e6 | Michael Hanselmann | |
765 | 85f03e0d | Michael Hanselmann | @staticmethod
|
766 | 85f03e0d | Michael Hanselmann | def _GetJobPath(job_id): |
767 | ea03467c | Iustin Pop | """Returns the job file for a given job id.
|
768 | ea03467c | Iustin Pop |
|
769 | ea03467c | Iustin Pop | @type job_id: str
|
770 | ea03467c | Iustin Pop | @param job_id: the job identifier
|
771 | ea03467c | Iustin Pop | @rtype: str
|
772 | ea03467c | Iustin Pop | @return: the path to the job file
|
773 | ea03467c | Iustin Pop |
|
774 | ea03467c | Iustin Pop | """
|
775 | f1da30e6 | Michael Hanselmann | return os.path.join(constants.QUEUE_DIR, "job-%s" % job_id) |
776 | f1da30e6 | Michael Hanselmann | |
777 | 85f03e0d | Michael Hanselmann | @staticmethod
|
778 | 85f03e0d | Michael Hanselmann | def _GetArchivedJobPath(job_id): |
779 | ea03467c | Iustin Pop | """Returns the archived job file for a give job id.
|
780 | ea03467c | Iustin Pop |
|
781 | ea03467c | Iustin Pop | @type job_id: str
|
782 | ea03467c | Iustin Pop | @param job_id: the job identifier
|
783 | ea03467c | Iustin Pop | @rtype: str
|
784 | ea03467c | Iustin Pop | @return: the path to the archived job file
|
785 | ea03467c | Iustin Pop |
|
786 | ea03467c | Iustin Pop | """
|
787 | 0cb94105 | Michael Hanselmann | return os.path.join(constants.JOB_QUEUE_ARCHIVE_DIR, "job-%s" % job_id) |
788 | 0cb94105 | Michael Hanselmann | |
789 | 85f03e0d | Michael Hanselmann | @classmethod
|
790 | 85f03e0d | Michael Hanselmann | def _ExtractJobID(cls, name): |
791 | ea03467c | Iustin Pop | """Extract the job id from a filename.
|
792 | ea03467c | Iustin Pop |
|
793 | ea03467c | Iustin Pop | @type name: str
|
794 | ea03467c | Iustin Pop | @param name: the job filename
|
795 | ea03467c | Iustin Pop | @rtype: job id or None
|
796 | ea03467c | Iustin Pop | @return: the job id corresponding to the given filename,
|
797 | ea03467c | Iustin Pop | or None if the filename does not represent a valid
|
798 | ea03467c | Iustin Pop | job file
|
799 | ea03467c | Iustin Pop |
|
800 | ea03467c | Iustin Pop | """
|
801 | 85f03e0d | Michael Hanselmann | m = cls._RE_JOB_FILE.match(name) |
802 | fae737ac | Michael Hanselmann | if m:
|
803 | fae737ac | Michael Hanselmann | return m.group(1) |
804 | fae737ac | Michael Hanselmann | else:
|
805 | fae737ac | Michael Hanselmann | return None |
806 | fae737ac | Michael Hanselmann | |
807 | 911a495b | Iustin Pop | def _GetJobIDsUnlocked(self, archived=False): |
808 | 911a495b | Iustin Pop | """Return all known job IDs.
|
809 | 911a495b | Iustin Pop |
|
810 | 911a495b | Iustin Pop | If the parameter archived is True, archived jobs IDs will be
|
811 | 911a495b | Iustin Pop | included. Currently this argument is unused.
|
812 | 911a495b | Iustin Pop |
|
813 | ac0930b9 | Iustin Pop | The method only looks at disk because it's a requirement that all
|
814 | ac0930b9 | Iustin Pop | jobs are present on disk (so in the _memcache we don't have any
|
815 | ac0930b9 | Iustin Pop | extra IDs).
|
816 | ac0930b9 | Iustin Pop |
|
817 | ea03467c | Iustin Pop | @rtype: list
|
818 | ea03467c | Iustin Pop | @return: the list of job IDs
|
819 | ea03467c | Iustin Pop |
|
820 | 911a495b | Iustin Pop | """
|
821 | fae737ac | Michael Hanselmann | jlist = [self._ExtractJobID(name) for name in self._ListJobFiles()] |
822 | 3b87986e | Iustin Pop | jlist = utils.NiceSort(jlist) |
823 | f0d874fe | Iustin Pop | return jlist
|
824 | 911a495b | Iustin Pop | |
825 | f1da30e6 | Michael Hanselmann | def _ListJobFiles(self): |
826 | ea03467c | Iustin Pop | """Returns the list of current job files.
|
827 | ea03467c | Iustin Pop |
|
828 | ea03467c | Iustin Pop | @rtype: list
|
829 | ea03467c | Iustin Pop | @return: the list of job file names
|
830 | ea03467c | Iustin Pop |
|
831 | ea03467c | Iustin Pop | """
|
832 | f1da30e6 | Michael Hanselmann | return [name for name in utils.ListVisibleFiles(constants.QUEUE_DIR) |
833 | f1da30e6 | Michael Hanselmann | if self._RE_JOB_FILE.match(name)] |
834 | f1da30e6 | Michael Hanselmann | |
835 | 911a495b | Iustin Pop | def _LoadJobUnlocked(self, job_id): |
836 | ea03467c | Iustin Pop | """Loads a job from the disk or memory.
|
837 | ea03467c | Iustin Pop |
|
838 | ea03467c | Iustin Pop | Given a job id, this will return the cached job object if
|
839 | ea03467c | Iustin Pop | existing, or try to load the job from the disk. If loading from
|
840 | ea03467c | Iustin Pop | disk, it will also add the job to the cache.
|
841 | ea03467c | Iustin Pop |
|
842 | ea03467c | Iustin Pop | @param job_id: the job id
|
843 | ea03467c | Iustin Pop | @rtype: L{_QueuedJob} or None
|
844 | ea03467c | Iustin Pop | @return: either None or the job object
|
845 | ea03467c | Iustin Pop |
|
846 | ea03467c | Iustin Pop | """
|
847 | 5685c1a5 | Michael Hanselmann | job = self._memcache.get(job_id, None) |
848 | 5685c1a5 | Michael Hanselmann | if job:
|
849 | 205d71fd | Michael Hanselmann | logging.debug("Found job %s in memcache", job_id)
|
850 | 5685c1a5 | Michael Hanselmann | return job
|
851 | ac0930b9 | Iustin Pop | |
852 | 911a495b | Iustin Pop | filepath = self._GetJobPath(job_id)
|
853 | f1da30e6 | Michael Hanselmann | logging.debug("Loading job from %s", filepath)
|
854 | f1da30e6 | Michael Hanselmann | try:
|
855 | f1da30e6 | Michael Hanselmann | fd = open(filepath, "r") |
856 | f1da30e6 | Michael Hanselmann | except IOError, err: |
857 | f1da30e6 | Michael Hanselmann | if err.errno in (errno.ENOENT, ): |
858 | f1da30e6 | Michael Hanselmann | return None |
859 | f1da30e6 | Michael Hanselmann | raise
|
860 | f1da30e6 | Michael Hanselmann | try:
|
861 | f1da30e6 | Michael Hanselmann | data = serializer.LoadJson(fd.read()) |
862 | f1da30e6 | Michael Hanselmann | finally:
|
863 | f1da30e6 | Michael Hanselmann | fd.close() |
864 | f1da30e6 | Michael Hanselmann | |
865 | 94ed59a5 | Iustin Pop | try:
|
866 | 94ed59a5 | Iustin Pop | job = _QueuedJob.Restore(self, data)
|
867 | 94ed59a5 | Iustin Pop | except Exception, err: |
868 | 94ed59a5 | Iustin Pop | new_path = self._GetArchivedJobPath(job_id)
|
869 | 94ed59a5 | Iustin Pop | if filepath == new_path:
|
870 | 94ed59a5 | Iustin Pop | # job already archived (future case)
|
871 | 94ed59a5 | Iustin Pop | logging.exception("Can't parse job %s", job_id)
|
872 | 94ed59a5 | Iustin Pop | else:
|
873 | 94ed59a5 | Iustin Pop | # non-archived case
|
874 | 94ed59a5 | Iustin Pop | logging.exception("Can't parse job %s, will archive.", job_id)
|
875 | 94ed59a5 | Iustin Pop | self._RenameFileUnlocked(filepath, new_path)
|
876 | 94ed59a5 | Iustin Pop | return None |
877 | 94ed59a5 | Iustin Pop | |
878 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
879 | 205d71fd | Michael Hanselmann | logging.debug("Added job %s to the cache", job_id)
|
880 | ac0930b9 | Iustin Pop | return job
|
881 | f1da30e6 | Michael Hanselmann | |
882 | f1da30e6 | Michael Hanselmann | def _GetJobsUnlocked(self, job_ids): |
883 | ea03467c | Iustin Pop | """Return a list of jobs based on their IDs.
|
884 | ea03467c | Iustin Pop |
|
885 | ea03467c | Iustin Pop | @type job_ids: list
|
886 | ea03467c | Iustin Pop | @param job_ids: either an empty list (meaning all jobs),
|
887 | ea03467c | Iustin Pop | or a list of job IDs
|
888 | ea03467c | Iustin Pop | @rtype: list
|
889 | ea03467c | Iustin Pop | @return: the list of job objects
|
890 | ea03467c | Iustin Pop |
|
891 | ea03467c | Iustin Pop | """
|
892 | 911a495b | Iustin Pop | if not job_ids: |
893 | 911a495b | Iustin Pop | job_ids = self._GetJobIDsUnlocked()
|
894 | f1da30e6 | Michael Hanselmann | |
895 | 911a495b | Iustin Pop | return [self._LoadJobUnlocked(job_id) for job_id in job_ids] |
896 | f1da30e6 | Michael Hanselmann | |
897 | 686d7433 | Iustin Pop | @staticmethod
|
898 | 686d7433 | Iustin Pop | def _IsQueueMarkedDrain(): |
899 | 686d7433 | Iustin Pop | """Check if the queue is marked from drain.
|
900 | 686d7433 | Iustin Pop |
|
901 | 686d7433 | Iustin Pop | This currently uses the queue drain file, which makes it a
|
902 | 686d7433 | Iustin Pop | per-node flag. In the future this can be moved to the config file.
|
903 | 686d7433 | Iustin Pop |
|
904 | ea03467c | Iustin Pop | @rtype: boolean
|
905 | ea03467c | Iustin Pop | @return: True of the job queue is marked for draining
|
906 | ea03467c | Iustin Pop |
|
907 | 686d7433 | Iustin Pop | """
|
908 | 686d7433 | Iustin Pop | return os.path.exists(constants.JOB_QUEUE_DRAIN_FILE)
|
909 | 686d7433 | Iustin Pop | |
910 | 3ccafd0e | Iustin Pop | @staticmethod
|
911 | 3ccafd0e | Iustin Pop | def SetDrainFlag(drain_flag): |
912 | 3ccafd0e | Iustin Pop | """Sets the drain flag for the queue.
|
913 | 3ccafd0e | Iustin Pop |
|
914 | 3ccafd0e | Iustin Pop | This is similar to the function L{backend.JobQueueSetDrainFlag},
|
915 | 3ccafd0e | Iustin Pop | and in the future we might merge them.
|
916 | 3ccafd0e | Iustin Pop |
|
917 | ea03467c | Iustin Pop | @type drain_flag: boolean
|
918 | ea03467c | Iustin Pop | @param drain_flag: wheter to set or unset the drain flag
|
919 | ea03467c | Iustin Pop |
|
920 | 3ccafd0e | Iustin Pop | """
|
921 | 3ccafd0e | Iustin Pop | if drain_flag:
|
922 | 3ccafd0e | Iustin Pop | utils.WriteFile(constants.JOB_QUEUE_DRAIN_FILE, data="", close=True) |
923 | 3ccafd0e | Iustin Pop | else:
|
924 | 3ccafd0e | Iustin Pop | utils.RemoveFile(constants.JOB_QUEUE_DRAIN_FILE) |
925 | 3ccafd0e | Iustin Pop | return True |
926 | 3ccafd0e | Iustin Pop | |
927 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
928 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
929 | 4c848b18 | Michael Hanselmann | def SubmitJob(self, ops): |
930 | 85f03e0d | Michael Hanselmann | """Create and store a new job.
|
931 | f1da30e6 | Michael Hanselmann |
|
932 | 85f03e0d | Michael Hanselmann | This enters the job into our job queue and also puts it on the new
|
933 | 85f03e0d | Michael Hanselmann | queue, in order for it to be picked up by the queue processors.
|
934 | c3f0a12f | Iustin Pop |
|
935 | c3f0a12f | Iustin Pop | @type ops: list
|
936 | 205d71fd | Michael Hanselmann | @param ops: The list of OpCodes that will become the new job.
|
937 | ea03467c | Iustin Pop | @rtype: job ID
|
938 | ea03467c | Iustin Pop | @return: the job ID of the newly created job
|
939 | ea03467c | Iustin Pop | @raise errors.JobQueueDrainError: if the job is marked for draining
|
940 | c3f0a12f | Iustin Pop |
|
941 | c3f0a12f | Iustin Pop | """
|
942 | 686d7433 | Iustin Pop | if self._IsQueueMarkedDrain(): |
943 | 686d7433 | Iustin Pop | raise errors.JobQueueDrainError()
|
944 | f1da30e6 | Michael Hanselmann | # Get job identifier
|
945 | 4c848b18 | Michael Hanselmann | job_id = self._NewSerialUnlocked()
|
946 | f1da30e6 | Michael Hanselmann | job = _QueuedJob(self, job_id, ops)
|
947 | f1da30e6 | Michael Hanselmann | |
948 | f1da30e6 | Michael Hanselmann | # Write to disk
|
949 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
950 | f1da30e6 | Michael Hanselmann | |
951 | 5685c1a5 | Michael Hanselmann | logging.debug("Adding new job %s to the cache", job_id)
|
952 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
953 | ac0930b9 | Iustin Pop | |
954 | 85f03e0d | Michael Hanselmann | # Add to worker pool
|
955 | 85f03e0d | Michael Hanselmann | self._wpool.AddTask(job)
|
956 | 85f03e0d | Michael Hanselmann | |
957 | 85f03e0d | Michael Hanselmann | return job.id
|
958 | f1da30e6 | Michael Hanselmann | |
959 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
960 | 85f03e0d | Michael Hanselmann | def UpdateJobUnlocked(self, job): |
961 | ea03467c | Iustin Pop | """Update a job's on disk storage.
|
962 | ea03467c | Iustin Pop |
|
963 | ea03467c | Iustin Pop | After a job has been modified, this function needs to be called in
|
964 | ea03467c | Iustin Pop | order to write the changes to disk and replicate them to the other
|
965 | ea03467c | Iustin Pop | nodes.
|
966 | ea03467c | Iustin Pop |
|
967 | ea03467c | Iustin Pop | @type job: L{_QueuedJob}
|
968 | ea03467c | Iustin Pop | @param job: the changed job
|
969 | ea03467c | Iustin Pop |
|
970 | ea03467c | Iustin Pop | """
|
971 | f1da30e6 | Michael Hanselmann | filename = self._GetJobPath(job.id)
|
972 | 23752136 | Michael Hanselmann | data = serializer.DumpJson(job.Serialize(), indent=False)
|
973 | f1da30e6 | Michael Hanselmann | logging.debug("Writing job %s to %s", job.id, filename)
|
974 | 23752136 | Michael Hanselmann | self._WriteAndReplicateFileUnlocked(filename, data)
|
975 | ac0930b9 | Iustin Pop | |
976 | dfe57c22 | Michael Hanselmann | # Notify waiters about potential changes
|
977 | 6c5a7090 | Michael Hanselmann | job.change.notifyAll() |
978 | dfe57c22 | Michael Hanselmann | |
979 | 6c5a7090 | Michael Hanselmann | @utils.LockedMethod
|
980 | dfe57c22 | Michael Hanselmann | @_RequireOpenQueue
|
981 | 5c735209 | Iustin Pop | def WaitForJobChanges(self, job_id, fields, prev_job_info, prev_log_serial, |
982 | 5c735209 | Iustin Pop | timeout): |
983 | 6c5a7090 | Michael Hanselmann | """Waits for changes in a job.
|
984 | 6c5a7090 | Michael Hanselmann |
|
985 | 6c5a7090 | Michael Hanselmann | @type job_id: string
|
986 | 6c5a7090 | Michael Hanselmann | @param job_id: Job identifier
|
987 | 6c5a7090 | Michael Hanselmann | @type fields: list of strings
|
988 | 6c5a7090 | Michael Hanselmann | @param fields: Which fields to check for changes
|
989 | 6c5a7090 | Michael Hanselmann | @type prev_job_info: list or None
|
990 | 6c5a7090 | Michael Hanselmann | @param prev_job_info: Last job information returned
|
991 | 6c5a7090 | Michael Hanselmann | @type prev_log_serial: int
|
992 | 6c5a7090 | Michael Hanselmann | @param prev_log_serial: Last job message serial number
|
993 | 5c735209 | Iustin Pop | @type timeout: float
|
994 | 5c735209 | Iustin Pop | @param timeout: maximum time to wait
|
995 | ea03467c | Iustin Pop | @rtype: tuple (job info, log entries)
|
996 | ea03467c | Iustin Pop | @return: a tuple of the job information as required via
|
997 | ea03467c | Iustin Pop | the fields parameter, and the log entries as a list
|
998 | ea03467c | Iustin Pop |
|
999 | ea03467c | Iustin Pop | if the job has not changed and the timeout has expired,
|
1000 | ea03467c | Iustin Pop | we instead return a special value,
|
1001 | ea03467c | Iustin Pop | L{constants.JOB_NOTCHANGED}, which should be interpreted
|
1002 | ea03467c | Iustin Pop | as such by the clients
|
1003 | 6c5a7090 | Michael Hanselmann |
|
1004 | 6c5a7090 | Michael Hanselmann | """
|
1005 | dfe57c22 | Michael Hanselmann | logging.debug("Waiting for changes in job %s", job_id)
|
1006 | 5c735209 | Iustin Pop | end_time = time.time() + timeout |
1007 | dfe57c22 | Michael Hanselmann | while True: |
1008 | 5c735209 | Iustin Pop | delta_time = end_time - time.time() |
1009 | 5c735209 | Iustin Pop | if delta_time < 0: |
1010 | 5c735209 | Iustin Pop | return constants.JOB_NOTCHANGED
|
1011 | 5c735209 | Iustin Pop | |
1012 | 6c5a7090 | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
1013 | 6c5a7090 | Michael Hanselmann | if not job: |
1014 | 6c5a7090 | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
1015 | 6c5a7090 | Michael Hanselmann | break
|
1016 | dfe57c22 | Michael Hanselmann | |
1017 | 6c5a7090 | Michael Hanselmann | status = job.CalcStatus() |
1018 | 6c5a7090 | Michael Hanselmann | job_info = self._GetJobInfoUnlocked(job, fields)
|
1019 | 6c5a7090 | Michael Hanselmann | log_entries = job.GetLogEntries(prev_log_serial) |
1020 | dfe57c22 | Michael Hanselmann | |
1021 | dfe57c22 | Michael Hanselmann | # Serializing and deserializing data can cause type changes (e.g. from
|
1022 | dfe57c22 | Michael Hanselmann | # tuple to list) or precision loss. We're doing it here so that we get
|
1023 | dfe57c22 | Michael Hanselmann | # the same modifications as the data received from the client. Without
|
1024 | dfe57c22 | Michael Hanselmann | # this, the comparison afterwards might fail without the data being
|
1025 | dfe57c22 | Michael Hanselmann | # significantly different.
|
1026 | 6c5a7090 | Michael Hanselmann | job_info = serializer.LoadJson(serializer.DumpJson(job_info)) |
1027 | 6c5a7090 | Michael Hanselmann | log_entries = serializer.LoadJson(serializer.DumpJson(log_entries)) |
1028 | dfe57c22 | Michael Hanselmann | |
1029 | 6c5a7090 | Michael Hanselmann | if status not in (constants.JOB_STATUS_QUEUED, |
1030 | e92376d7 | Iustin Pop | constants.JOB_STATUS_RUNNING, |
1031 | e92376d7 | Iustin Pop | constants.JOB_STATUS_WAITLOCK): |
1032 | 6c5a7090 | Michael Hanselmann | # Don't even try to wait if the job is no longer running, there will be
|
1033 | 6c5a7090 | Michael Hanselmann | # no changes.
|
1034 | dfe57c22 | Michael Hanselmann | break
|
1035 | dfe57c22 | Michael Hanselmann | |
1036 | 6c5a7090 | Michael Hanselmann | if (prev_job_info != job_info or |
1037 | 6c5a7090 | Michael Hanselmann | (log_entries and prev_log_serial != log_entries[0][0])): |
1038 | 6c5a7090 | Michael Hanselmann | break
|
1039 | 6c5a7090 | Michael Hanselmann | |
1040 | 6c5a7090 | Michael Hanselmann | logging.debug("Waiting again")
|
1041 | 6c5a7090 | Michael Hanselmann | |
1042 | 6c5a7090 | Michael Hanselmann | # Release the queue lock while waiting
|
1043 | 5c735209 | Iustin Pop | job.change.wait(delta_time) |
1044 | dfe57c22 | Michael Hanselmann | |
1045 | dfe57c22 | Michael Hanselmann | logging.debug("Job %s changed", job_id)
|
1046 | dfe57c22 | Michael Hanselmann | |
1047 | 6c5a7090 | Michael Hanselmann | return (job_info, log_entries)
|
1048 | dfe57c22 | Michael Hanselmann | |
1049 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
1050 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
1051 | 188c5e0a | Michael Hanselmann | def CancelJob(self, job_id): |
1052 | 188c5e0a | Michael Hanselmann | """Cancels a job.
|
1053 | 188c5e0a | Michael Hanselmann |
|
1054 | ea03467c | Iustin Pop | This will only succeed if the job has not started yet.
|
1055 | ea03467c | Iustin Pop |
|
1056 | 188c5e0a | Michael Hanselmann | @type job_id: string
|
1057 | ea03467c | Iustin Pop | @param job_id: job ID of job to be cancelled.
|
1058 | 188c5e0a | Michael Hanselmann |
|
1059 | 188c5e0a | Michael Hanselmann | """
|
1060 | fbf0262f | Michael Hanselmann | logging.info("Cancelling job %s", job_id)
|
1061 | 188c5e0a | Michael Hanselmann | |
1062 | 85f03e0d | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
1063 | 188c5e0a | Michael Hanselmann | if not job: |
1064 | 188c5e0a | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
1065 | fbf0262f | Michael Hanselmann | return (False, "Job %s not found" % job_id) |
1066 | fbf0262f | Michael Hanselmann | |
1067 | fbf0262f | Michael Hanselmann | job_status = job.CalcStatus() |
1068 | 188c5e0a | Michael Hanselmann | |
1069 | fbf0262f | Michael Hanselmann | if job_status not in (constants.JOB_STATUS_QUEUED, |
1070 | fbf0262f | Michael Hanselmann | constants.JOB_STATUS_WAITLOCK): |
1071 | 188c5e0a | Michael Hanselmann | logging.debug("Job %s is no longer in the queue", job.id)
|
1072 | fbf0262f | Michael Hanselmann | return (False, "Job %s is no longer in the queue" % job.id) |
1073 | fbf0262f | Michael Hanselmann | |
1074 | fbf0262f | Michael Hanselmann | if job_status == constants.JOB_STATUS_QUEUED:
|
1075 | fbf0262f | Michael Hanselmann | self.CancelJobUnlocked(job)
|
1076 | fbf0262f | Michael Hanselmann | return (True, "Job %s canceled" % job.id) |
1077 | 188c5e0a | Michael Hanselmann | |
1078 | fbf0262f | Michael Hanselmann | elif job_status == constants.JOB_STATUS_WAITLOCK:
|
1079 | fbf0262f | Michael Hanselmann | # The worker will notice the new status and cancel the job
|
1080 | fbf0262f | Michael Hanselmann | try:
|
1081 | fbf0262f | Michael Hanselmann | for op in job.ops: |
1082 | fbf0262f | Michael Hanselmann | op.status = constants.OP_STATUS_CANCELING |
1083 | fbf0262f | Michael Hanselmann | finally:
|
1084 | fbf0262f | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
1085 | fbf0262f | Michael Hanselmann | return (True, "Job %s will be canceled" % job.id) |
1086 | fbf0262f | Michael Hanselmann | |
1087 | fbf0262f | Michael Hanselmann | @_RequireOpenQueue
|
1088 | fbf0262f | Michael Hanselmann | def CancelJobUnlocked(self, job): |
1089 | fbf0262f | Michael Hanselmann | """Marks a job as canceled.
|
1090 | fbf0262f | Michael Hanselmann |
|
1091 | fbf0262f | Michael Hanselmann | """
|
1092 | 85f03e0d | Michael Hanselmann | try:
|
1093 | 85f03e0d | Michael Hanselmann | for op in job.ops: |
1094 | 85f03e0d | Michael Hanselmann | op.status = constants.OP_STATUS_ERROR |
1095 | fbf0262f | Michael Hanselmann | op.result = "Job canceled by request"
|
1096 | 85f03e0d | Michael Hanselmann | finally:
|
1097 | 85f03e0d | Michael Hanselmann | self.UpdateJobUnlocked(job)
|
1098 | 188c5e0a | Michael Hanselmann | |
1099 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
1100 | 07cd723a | Iustin Pop | def _ArchiveJobUnlocked(self, job_id): |
1101 | c609f802 | Michael Hanselmann | """Archives a job.
|
1102 | c609f802 | Michael Hanselmann |
|
1103 | c609f802 | Michael Hanselmann | @type job_id: string
|
1104 | c41eea6e | Iustin Pop | @param job_id: the ID of job to be archived
|
1105 | c609f802 | Michael Hanselmann |
|
1106 | c609f802 | Michael Hanselmann | """
|
1107 | 07cd723a | Iustin Pop | logging.info("Archiving job %s", job_id)
|
1108 | c609f802 | Michael Hanselmann | |
1109 | c609f802 | Michael Hanselmann | job = self._LoadJobUnlocked(job_id)
|
1110 | c609f802 | Michael Hanselmann | if not job: |
1111 | c609f802 | Michael Hanselmann | logging.debug("Job %s not found", job_id)
|
1112 | c609f802 | Michael Hanselmann | return
|
1113 | c609f802 | Michael Hanselmann | |
1114 | 85f03e0d | Michael Hanselmann | if job.CalcStatus() not in (constants.JOB_STATUS_CANCELED, |
1115 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_SUCCESS, |
1116 | 85f03e0d | Michael Hanselmann | constants.JOB_STATUS_ERROR): |
1117 | 85f03e0d | Michael Hanselmann | logging.debug("Job %s is not yet done", job.id)
|
1118 | c609f802 | Michael Hanselmann | return
|
1119 | c609f802 | Michael Hanselmann | |
1120 | 5685c1a5 | Michael Hanselmann | old = self._GetJobPath(job.id)
|
1121 | 5685c1a5 | Michael Hanselmann | new = self._GetArchivedJobPath(job.id)
|
1122 | c609f802 | Michael Hanselmann | |
1123 | 5685c1a5 | Michael Hanselmann | self._RenameFileUnlocked(old, new)
|
1124 | c609f802 | Michael Hanselmann | |
1125 | 5685c1a5 | Michael Hanselmann | logging.debug("Successfully archived job %s", job.id)
|
1126 | f1da30e6 | Michael Hanselmann | |
1127 | 07cd723a | Iustin Pop | @utils.LockedMethod
|
1128 | 07cd723a | Iustin Pop | @_RequireOpenQueue
|
1129 | 07cd723a | Iustin Pop | def ArchiveJob(self, job_id): |
1130 | 07cd723a | Iustin Pop | """Archives a job.
|
1131 | 07cd723a | Iustin Pop |
|
1132 | ea03467c | Iustin Pop | This is just a wrapper over L{_ArchiveJobUnlocked}.
|
1133 | ea03467c | Iustin Pop |
|
1134 | 07cd723a | Iustin Pop | @type job_id: string
|
1135 | 07cd723a | Iustin Pop | @param job_id: Job ID of job to be archived.
|
1136 | 07cd723a | Iustin Pop |
|
1137 | 07cd723a | Iustin Pop | """
|
1138 | 07cd723a | Iustin Pop | return self._ArchiveJobUnlocked(job_id) |
1139 | 07cd723a | Iustin Pop | |
1140 | 07cd723a | Iustin Pop | @utils.LockedMethod
|
1141 | 07cd723a | Iustin Pop | @_RequireOpenQueue
|
1142 | 07cd723a | Iustin Pop | def AutoArchiveJobs(self, age): |
1143 | 07cd723a | Iustin Pop | """Archives all jobs based on age.
|
1144 | 07cd723a | Iustin Pop |
|
1145 | 07cd723a | Iustin Pop | The method will archive all jobs which are older than the age
|
1146 | 07cd723a | Iustin Pop | parameter. For jobs that don't have an end timestamp, the start
|
1147 | 07cd723a | Iustin Pop | timestamp will be considered. The special '-1' age will cause
|
1148 | 07cd723a | Iustin Pop | archival of all jobs (that are not running or queued).
|
1149 | 07cd723a | Iustin Pop |
|
1150 | 07cd723a | Iustin Pop | @type age: int
|
1151 | 07cd723a | Iustin Pop | @param age: the minimum age in seconds
|
1152 | 07cd723a | Iustin Pop |
|
1153 | 07cd723a | Iustin Pop | """
|
1154 | 07cd723a | Iustin Pop | logging.info("Archiving jobs with age more than %s seconds", age)
|
1155 | 07cd723a | Iustin Pop | |
1156 | 07cd723a | Iustin Pop | now = time.time() |
1157 | 07cd723a | Iustin Pop | for jid in self._GetJobIDsUnlocked(archived=False): |
1158 | 07cd723a | Iustin Pop | job = self._LoadJobUnlocked(jid)
|
1159 | 07cd723a | Iustin Pop | if job.CalcStatus() not in (constants.OP_STATUS_SUCCESS, |
1160 | 07cd723a | Iustin Pop | constants.OP_STATUS_ERROR, |
1161 | 07cd723a | Iustin Pop | constants.OP_STATUS_CANCELED): |
1162 | 07cd723a | Iustin Pop | continue
|
1163 | 07cd723a | Iustin Pop | if job.end_timestamp is None: |
1164 | 07cd723a | Iustin Pop | if job.start_timestamp is None: |
1165 | 07cd723a | Iustin Pop | job_age = job.received_timestamp |
1166 | 07cd723a | Iustin Pop | else:
|
1167 | 07cd723a | Iustin Pop | job_age = job.start_timestamp |
1168 | 07cd723a | Iustin Pop | else:
|
1169 | 07cd723a | Iustin Pop | job_age = job.end_timestamp |
1170 | 07cd723a | Iustin Pop | |
1171 | 07cd723a | Iustin Pop | if age == -1 or now - job_age[0] > age: |
1172 | 07cd723a | Iustin Pop | self._ArchiveJobUnlocked(jid)
|
1173 | 07cd723a | Iustin Pop | |
1174 | 85f03e0d | Michael Hanselmann | def _GetJobInfoUnlocked(self, job, fields): |
1175 | ea03467c | Iustin Pop | """Returns information about a job.
|
1176 | ea03467c | Iustin Pop |
|
1177 | ea03467c | Iustin Pop | @type job: L{_QueuedJob}
|
1178 | ea03467c | Iustin Pop | @param job: the job which we query
|
1179 | ea03467c | Iustin Pop | @type fields: list
|
1180 | ea03467c | Iustin Pop | @param fields: names of fields to return
|
1181 | ea03467c | Iustin Pop | @rtype: list
|
1182 | ea03467c | Iustin Pop | @return: list with one element for each field
|
1183 | ea03467c | Iustin Pop | @raise errors.OpExecError: when an invalid field
|
1184 | ea03467c | Iustin Pop | has been passed
|
1185 | ea03467c | Iustin Pop |
|
1186 | ea03467c | Iustin Pop | """
|
1187 | e2715f69 | Michael Hanselmann | row = [] |
1188 | e2715f69 | Michael Hanselmann | for fname in fields: |
1189 | e2715f69 | Michael Hanselmann | if fname == "id": |
1190 | e2715f69 | Michael Hanselmann | row.append(job.id) |
1191 | e2715f69 | Michael Hanselmann | elif fname == "status": |
1192 | 85f03e0d | Michael Hanselmann | row.append(job.CalcStatus()) |
1193 | af30b2fd | Michael Hanselmann | elif fname == "ops": |
1194 | 85f03e0d | Michael Hanselmann | row.append([op.input.__getstate__() for op in job.ops]) |
1195 | af30b2fd | Michael Hanselmann | elif fname == "opresult": |
1196 | 85f03e0d | Michael Hanselmann | row.append([op.result for op in job.ops]) |
1197 | af30b2fd | Michael Hanselmann | elif fname == "opstatus": |
1198 | 85f03e0d | Michael Hanselmann | row.append([op.status for op in job.ops]) |
1199 | 5b23c34c | Iustin Pop | elif fname == "oplog": |
1200 | 5b23c34c | Iustin Pop | row.append([op.log for op in job.ops]) |
1201 | c56ec146 | Iustin Pop | elif fname == "opstart": |
1202 | c56ec146 | Iustin Pop | row.append([op.start_timestamp for op in job.ops]) |
1203 | c56ec146 | Iustin Pop | elif fname == "opend": |
1204 | c56ec146 | Iustin Pop | row.append([op.end_timestamp for op in job.ops]) |
1205 | c56ec146 | Iustin Pop | elif fname == "received_ts": |
1206 | c56ec146 | Iustin Pop | row.append(job.received_timestamp) |
1207 | c56ec146 | Iustin Pop | elif fname == "start_ts": |
1208 | c56ec146 | Iustin Pop | row.append(job.start_timestamp) |
1209 | c56ec146 | Iustin Pop | elif fname == "end_ts": |
1210 | c56ec146 | Iustin Pop | row.append(job.end_timestamp) |
1211 | 60dd1473 | Iustin Pop | elif fname == "summary": |
1212 | 60dd1473 | Iustin Pop | row.append([op.input.Summary() for op in job.ops]) |
1213 | e2715f69 | Michael Hanselmann | else:
|
1214 | e2715f69 | Michael Hanselmann | raise errors.OpExecError("Invalid job query field '%s'" % fname) |
1215 | e2715f69 | Michael Hanselmann | return row
|
1216 | e2715f69 | Michael Hanselmann | |
1217 | 85f03e0d | Michael Hanselmann | @utils.LockedMethod
|
1218 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
1219 | e2715f69 | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
1220 | e2715f69 | Michael Hanselmann | """Returns a list of jobs in queue.
|
1221 | e2715f69 | Michael Hanselmann |
|
1222 | ea03467c | Iustin Pop | This is a wrapper of L{_GetJobsUnlocked}, which actually does the
|
1223 | ea03467c | Iustin Pop | processing for each job.
|
1224 | ea03467c | Iustin Pop |
|
1225 | ea03467c | Iustin Pop | @type job_ids: list
|
1226 | ea03467c | Iustin Pop | @param job_ids: sequence of job identifiers or None for all
|
1227 | ea03467c | Iustin Pop | @type fields: list
|
1228 | ea03467c | Iustin Pop | @param fields: names of fields to return
|
1229 | ea03467c | Iustin Pop | @rtype: list
|
1230 | ea03467c | Iustin Pop | @return: list one element per job, each element being list with
|
1231 | ea03467c | Iustin Pop | the requested fields
|
1232 | e2715f69 | Michael Hanselmann |
|
1233 | e2715f69 | Michael Hanselmann | """
|
1234 | 85f03e0d | Michael Hanselmann | jobs = [] |
1235 | e2715f69 | Michael Hanselmann | |
1236 | 85f03e0d | Michael Hanselmann | for job in self._GetJobsUnlocked(job_ids): |
1237 | 85f03e0d | Michael Hanselmann | if job is None: |
1238 | 85f03e0d | Michael Hanselmann | jobs.append(None)
|
1239 | 85f03e0d | Michael Hanselmann | else:
|
1240 | 85f03e0d | Michael Hanselmann | jobs.append(self._GetJobInfoUnlocked(job, fields))
|
1241 | e2715f69 | Michael Hanselmann | |
1242 | 85f03e0d | Michael Hanselmann | return jobs
|
1243 | e2715f69 | Michael Hanselmann | |
1244 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
1245 | db37da70 | Michael Hanselmann | @_RequireOpenQueue
|
1246 | e2715f69 | Michael Hanselmann | def Shutdown(self): |
1247 | e2715f69 | Michael Hanselmann | """Stops the job queue.
|
1248 | e2715f69 | Michael Hanselmann |
|
1249 | ea03467c | Iustin Pop | This shutdowns all the worker threads an closes the queue.
|
1250 | ea03467c | Iustin Pop |
|
1251 | e2715f69 | Michael Hanselmann | """
|
1252 | e2715f69 | Michael Hanselmann | self._wpool.TerminateWorkers()
|
1253 | 85f03e0d | Michael Hanselmann | |
1254 | 04ab05ce | Michael Hanselmann | self._queue_lock.Close()
|
1255 | 04ab05ce | Michael Hanselmann | self._queue_lock = None |