root / lib / mcpu.py @ 7d20c647
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2 | a8083063 | Iustin Pop | #
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3 | a8083063 | Iustin Pop | |
4 | a8083063 | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
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5 | a8083063 | Iustin Pop | #
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6 | a8083063 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | a8083063 | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | a8083063 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | a8083063 | Iustin Pop | # (at your option) any later version.
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10 | a8083063 | Iustin Pop | #
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11 | a8083063 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | a8083063 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | a8083063 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | a8083063 | Iustin Pop | # General Public License for more details.
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15 | a8083063 | Iustin Pop | #
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16 | a8083063 | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | a8083063 | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | a8083063 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | a8083063 | Iustin Pop | # 02110-1301, USA.
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20 | a8083063 | Iustin Pop | |
21 | a8083063 | Iustin Pop | |
22 | a8083063 | Iustin Pop | """Module implementing the logic behind the cluster operations
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23 | a8083063 | Iustin Pop |
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24 | a8083063 | Iustin Pop | This module implements the logic for doing operations in the cluster. There
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25 | a8083063 | Iustin Pop | are two kinds of classes defined:
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26 | a8083063 | Iustin Pop | - logical units, which know how to deal with their specific opcode only
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27 | a8083063 | Iustin Pop | - the processor, which dispatches the opcodes to their logical units
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28 | a8083063 | Iustin Pop |
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29 | a8083063 | Iustin Pop | """
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30 | a8083063 | Iustin Pop | |
31 | a5eb7789 | Iustin Pop | import logging |
32 | a8083063 | Iustin Pop | |
33 | a8083063 | Iustin Pop | from ganeti import opcodes |
34 | a8083063 | Iustin Pop | from ganeti import constants |
35 | a8083063 | Iustin Pop | from ganeti import errors |
36 | a8083063 | Iustin Pop | from ganeti import rpc |
37 | a8083063 | Iustin Pop | from ganeti import cmdlib |
38 | 04864530 | Guido Trotter | from ganeti import locking |
39 | ef2df7d3 | Michael Hanselmann | from ganeti import utils |
40 | a8083063 | Iustin Pop | |
41 | 7c0d6283 | Michael Hanselmann | |
42 | 031a3e57 | Michael Hanselmann | class OpExecCbBase: |
43 | 031a3e57 | Michael Hanselmann | """Base class for OpCode execution callbacks.
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44 | 031a3e57 | Michael Hanselmann |
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45 | 031a3e57 | Michael Hanselmann | """
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46 | 031a3e57 | Michael Hanselmann | def NotifyStart(self): |
47 | 031a3e57 | Michael Hanselmann | """Called when we are about to execute the LU.
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48 | 031a3e57 | Michael Hanselmann |
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49 | 031a3e57 | Michael Hanselmann | This function is called when we're about to start the lu's Exec() method,
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50 | 031a3e57 | Michael Hanselmann | that is, after we have acquired all locks.
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51 | 031a3e57 | Michael Hanselmann |
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52 | 031a3e57 | Michael Hanselmann | """
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53 | 031a3e57 | Michael Hanselmann | |
54 | 031a3e57 | Michael Hanselmann | def Feedback(self, *args): |
55 | 031a3e57 | Michael Hanselmann | """Sends feedback from the LU code to the end-user.
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56 | 031a3e57 | Michael Hanselmann |
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57 | 031a3e57 | Michael Hanselmann | """
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58 | 031a3e57 | Michael Hanselmann | |
59 | ef2df7d3 | Michael Hanselmann | def ReportLocks(self, msg): |
60 | ef2df7d3 | Michael Hanselmann | """Report lock operations.
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61 | ef2df7d3 | Michael Hanselmann |
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62 | ef2df7d3 | Michael Hanselmann | """
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63 | ef2df7d3 | Michael Hanselmann | |
64 | 031a3e57 | Michael Hanselmann | |
65 | a8083063 | Iustin Pop | class Processor(object): |
66 | a8083063 | Iustin Pop | """Object which runs OpCodes"""
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67 | a8083063 | Iustin Pop | DISPATCH_TABLE = { |
68 | a8083063 | Iustin Pop | # Cluster
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69 | b5f5fae9 | Luca Bigliardi | opcodes.OpPostInitCluster: cmdlib.LUPostInitCluster, |
70 | a8083063 | Iustin Pop | opcodes.OpDestroyCluster: cmdlib.LUDestroyCluster, |
71 | a8083063 | Iustin Pop | opcodes.OpQueryClusterInfo: cmdlib.LUQueryClusterInfo, |
72 | a8083063 | Iustin Pop | opcodes.OpVerifyCluster: cmdlib.LUVerifyCluster, |
73 | ae5849b5 | Michael Hanselmann | opcodes.OpQueryConfigValues: cmdlib.LUQueryConfigValues, |
74 | 07bd8a51 | Iustin Pop | opcodes.OpRenameCluster: cmdlib.LURenameCluster, |
75 | f4d4e184 | Iustin Pop | opcodes.OpVerifyDisks: cmdlib.LUVerifyDisks, |
76 | 0cc05d44 | Manuel Franceschini | opcodes.OpSetClusterParams: cmdlib.LUSetClusterParams, |
77 | afee0879 | Iustin Pop | opcodes.OpRedistributeConfig: cmdlib.LURedistributeConfig, |
78 | 60975797 | Iustin Pop | opcodes.OpRepairDiskSizes: cmdlib.LURepairDiskSizes, |
79 | a8083063 | Iustin Pop | # node lu
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80 | a8083063 | Iustin Pop | opcodes.OpAddNode: cmdlib.LUAddNode, |
81 | a8083063 | Iustin Pop | opcodes.OpQueryNodes: cmdlib.LUQueryNodes, |
82 | dcb93971 | Michael Hanselmann | opcodes.OpQueryNodeVolumes: cmdlib.LUQueryNodeVolumes, |
83 | 9e5442ce | Michael Hanselmann | opcodes.OpQueryNodeStorage: cmdlib.LUQueryNodeStorage, |
84 | efb8da02 | Michael Hanselmann | opcodes.OpModifyNodeStorage: cmdlib.LUModifyNodeStorage, |
85 | 76aef8fc | Michael Hanselmann | opcodes.OpRepairNodeStorage: cmdlib.LURepairNodeStorage, |
86 | a8083063 | Iustin Pop | opcodes.OpRemoveNode: cmdlib.LURemoveNode, |
87 | b31c8676 | Iustin Pop | opcodes.OpSetNodeParams: cmdlib.LUSetNodeParams, |
88 | f5118ade | Iustin Pop | opcodes.OpPowercycleNode: cmdlib.LUPowercycleNode, |
89 | 7ffc5a86 | Michael Hanselmann | opcodes.OpEvacuateNode: cmdlib.LUEvacuateNode, |
90 | 80cb875c | Michael Hanselmann | opcodes.OpMigrateNode: cmdlib.LUMigrateNode, |
91 | a8083063 | Iustin Pop | # instance lu
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92 | a8083063 | Iustin Pop | opcodes.OpCreateInstance: cmdlib.LUCreateInstance, |
93 | fe7b0351 | Michael Hanselmann | opcodes.OpReinstallInstance: cmdlib.LUReinstallInstance, |
94 | a8083063 | Iustin Pop | opcodes.OpRemoveInstance: cmdlib.LURemoveInstance, |
95 | decd5f45 | Iustin Pop | opcodes.OpRenameInstance: cmdlib.LURenameInstance, |
96 | a8083063 | Iustin Pop | opcodes.OpActivateInstanceDisks: cmdlib.LUActivateInstanceDisks, |
97 | a8083063 | Iustin Pop | opcodes.OpShutdownInstance: cmdlib.LUShutdownInstance, |
98 | a8083063 | Iustin Pop | opcodes.OpStartupInstance: cmdlib.LUStartupInstance, |
99 | bf6929a2 | Alexander Schreiber | opcodes.OpRebootInstance: cmdlib.LURebootInstance, |
100 | a8083063 | Iustin Pop | opcodes.OpDeactivateInstanceDisks: cmdlib.LUDeactivateInstanceDisks, |
101 | a8083063 | Iustin Pop | opcodes.OpReplaceDisks: cmdlib.LUReplaceDisks, |
102 | bd315bfa | Iustin Pop | opcodes.OpRecreateInstanceDisks: cmdlib.LURecreateInstanceDisks, |
103 | a8083063 | Iustin Pop | opcodes.OpFailoverInstance: cmdlib.LUFailoverInstance, |
104 | 53c776b5 | Iustin Pop | opcodes.OpMigrateInstance: cmdlib.LUMigrateInstance, |
105 | 313bcead | Iustin Pop | opcodes.OpMoveInstance: cmdlib.LUMoveInstance, |
106 | a8083063 | Iustin Pop | opcodes.OpConnectConsole: cmdlib.LUConnectConsole, |
107 | a8083063 | Iustin Pop | opcodes.OpQueryInstances: cmdlib.LUQueryInstances, |
108 | a8083063 | Iustin Pop | opcodes.OpQueryInstanceData: cmdlib.LUQueryInstanceData, |
109 | 7767bbf5 | Manuel Franceschini | opcodes.OpSetInstanceParams: cmdlib.LUSetInstanceParams, |
110 | 8729e0d7 | Iustin Pop | opcodes.OpGrowDisk: cmdlib.LUGrowDisk, |
111 | a8083063 | Iustin Pop | # os lu
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112 | a8083063 | Iustin Pop | opcodes.OpDiagnoseOS: cmdlib.LUDiagnoseOS, |
113 | a8083063 | Iustin Pop | # exports lu
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114 | a8083063 | Iustin Pop | opcodes.OpQueryExports: cmdlib.LUQueryExports, |
115 | a8083063 | Iustin Pop | opcodes.OpExportInstance: cmdlib.LUExportInstance, |
116 | 9ac99fda | Guido Trotter | opcodes.OpRemoveExport: cmdlib.LURemoveExport, |
117 | 5c947f38 | Iustin Pop | # tags lu
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118 | 5c947f38 | Iustin Pop | opcodes.OpGetTags: cmdlib.LUGetTags, |
119 | 73415719 | Iustin Pop | opcodes.OpSearchTags: cmdlib.LUSearchTags, |
120 | f27302fa | Iustin Pop | opcodes.OpAddTags: cmdlib.LUAddTags, |
121 | f27302fa | Iustin Pop | opcodes.OpDelTags: cmdlib.LUDelTags, |
122 | 06009e27 | Iustin Pop | # test lu
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123 | 06009e27 | Iustin Pop | opcodes.OpTestDelay: cmdlib.LUTestDelay, |
124 | d61df03e | Iustin Pop | opcodes.OpTestAllocator: cmdlib.LUTestAllocator, |
125 | a8083063 | Iustin Pop | } |
126 | a8083063 | Iustin Pop | |
127 | f1048938 | Iustin Pop | def __init__(self, context): |
128 | a8083063 | Iustin Pop | """Constructor for Processor
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129 | a8083063 | Iustin Pop |
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130 | a8083063 | Iustin Pop | """
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131 | 1c901d13 | Guido Trotter | self.context = context
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132 | 031a3e57 | Michael Hanselmann | self._cbs = None |
133 | 04864530 | Guido Trotter | self.exclusive_BGL = False |
134 | 72737a7f | Iustin Pop | self.rpc = rpc.RpcRunner(context.cfg)
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135 | cd46f3b4 | Luca Bigliardi | self.hmclass = HooksMaster
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136 | a8083063 | Iustin Pop | |
137 | ef2df7d3 | Michael Hanselmann | def _ReportLocks(self, level, names, shared, acquired): |
138 | ef2df7d3 | Michael Hanselmann | """Reports lock operations.
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139 | ef2df7d3 | Michael Hanselmann |
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140 | ef2df7d3 | Michael Hanselmann | @type level: int
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141 | ef2df7d3 | Michael Hanselmann | @param level: Lock level
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142 | ef2df7d3 | Michael Hanselmann | @type names: list or string
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143 | ef2df7d3 | Michael Hanselmann | @param names: Lock names
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144 | ef2df7d3 | Michael Hanselmann | @type shared: bool
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145 | ef2df7d3 | Michael Hanselmann | @param shared: Whether the lock should be acquired in shared mode
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146 | ef2df7d3 | Michael Hanselmann | @type acquired: bool
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147 | ef2df7d3 | Michael Hanselmann | @param acquired: Whether the lock has already been acquired
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148 | ef2df7d3 | Michael Hanselmann |
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149 | ef2df7d3 | Michael Hanselmann | """
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150 | ef2df7d3 | Michael Hanselmann | parts = [] |
151 | ef2df7d3 | Michael Hanselmann | |
152 | ef2df7d3 | Michael Hanselmann | # Build message
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153 | ef2df7d3 | Michael Hanselmann | if acquired:
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154 | ef2df7d3 | Michael Hanselmann | parts.append("acquired")
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155 | ef2df7d3 | Michael Hanselmann | else:
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156 | ef2df7d3 | Michael Hanselmann | parts.append("waiting")
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157 | ef2df7d3 | Michael Hanselmann | |
158 | ef2df7d3 | Michael Hanselmann | parts.append(locking.LEVEL_NAMES[level]) |
159 | ef2df7d3 | Michael Hanselmann | |
160 | ef2df7d3 | Michael Hanselmann | if names == locking.ALL_SET:
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161 | ef2df7d3 | Michael Hanselmann | parts.append("ALL")
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162 | ef2df7d3 | Michael Hanselmann | elif isinstance(names, basestring): |
163 | ef2df7d3 | Michael Hanselmann | parts.append(names) |
164 | ef2df7d3 | Michael Hanselmann | else:
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165 | ef2df7d3 | Michael Hanselmann | parts.append(",".join(names))
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166 | ef2df7d3 | Michael Hanselmann | |
167 | ef2df7d3 | Michael Hanselmann | if shared:
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168 | ef2df7d3 | Michael Hanselmann | parts.append("shared")
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169 | ef2df7d3 | Michael Hanselmann | else:
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170 | ef2df7d3 | Michael Hanselmann | parts.append("exclusive")
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171 | ef2df7d3 | Michael Hanselmann | |
172 | ef2df7d3 | Michael Hanselmann | msg = "/".join(parts)
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173 | ef2df7d3 | Michael Hanselmann | |
174 | ef2df7d3 | Michael Hanselmann | logging.debug("LU locks %s", msg)
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175 | ef2df7d3 | Michael Hanselmann | |
176 | ef2df7d3 | Michael Hanselmann | if self._cbs: |
177 | ef2df7d3 | Michael Hanselmann | self._cbs.ReportLocks(msg)
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178 | ef2df7d3 | Michael Hanselmann | |
179 | 36c381d7 | Guido Trotter | def _ExecLU(self, lu): |
180 | 36c381d7 | Guido Trotter | """Logical Unit execution sequence.
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181 | 36c381d7 | Guido Trotter |
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182 | 36c381d7 | Guido Trotter | """
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183 | 36c381d7 | Guido Trotter | write_count = self.context.cfg.write_count
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184 | 36c381d7 | Guido Trotter | lu.CheckPrereq() |
185 | 4b5e8271 | Iustin Pop | hm = HooksMaster(self.rpc.call_hooks_runner, lu)
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186 | 36c381d7 | Guido Trotter | h_results = hm.RunPhase(constants.HOOKS_PHASE_PRE) |
187 | 36c381d7 | Guido Trotter | lu.HooksCallBack(constants.HOOKS_PHASE_PRE, h_results, |
188 | 031a3e57 | Michael Hanselmann | self._Feedback, None) |
189 | 20777413 | Iustin Pop | |
190 | 20777413 | Iustin Pop | if getattr(lu.op, "dry_run", False): |
191 | 20777413 | Iustin Pop | # in this mode, no post-hooks are run, and the config is not
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192 | 20777413 | Iustin Pop | # written (as it might have been modified by another LU, and we
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193 | 20777413 | Iustin Pop | # shouldn't do writeout on behalf of other threads
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194 | 20777413 | Iustin Pop | self.LogInfo("dry-run mode requested, not actually executing" |
195 | 20777413 | Iustin Pop | " the operation")
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196 | 20777413 | Iustin Pop | return lu.dry_run_result
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197 | 20777413 | Iustin Pop | |
198 | 36c381d7 | Guido Trotter | try:
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199 | 031a3e57 | Michael Hanselmann | result = lu.Exec(self._Feedback)
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200 | 36c381d7 | Guido Trotter | h_results = hm.RunPhase(constants.HOOKS_PHASE_POST) |
201 | 36c381d7 | Guido Trotter | result = lu.HooksCallBack(constants.HOOKS_PHASE_POST, h_results, |
202 | 031a3e57 | Michael Hanselmann | self._Feedback, result)
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203 | 36c381d7 | Guido Trotter | finally:
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204 | 36c381d7 | Guido Trotter | # FIXME: This needs locks if not lu_class.REQ_BGL
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205 | 36c381d7 | Guido Trotter | if write_count != self.context.cfg.write_count: |
206 | 36c381d7 | Guido Trotter | hm.RunConfigUpdate() |
207 | 36c381d7 | Guido Trotter | |
208 | 36c381d7 | Guido Trotter | return result
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209 | 36c381d7 | Guido Trotter | |
210 | 68adfdb2 | Guido Trotter | def _LockAndExecLU(self, lu, level): |
211 | 68adfdb2 | Guido Trotter | """Execute a Logical Unit, with the needed locks.
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212 | 68adfdb2 | Guido Trotter |
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213 | 68adfdb2 | Guido Trotter | This is a recursive function that starts locking the given level, and
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214 | 68adfdb2 | Guido Trotter | proceeds up, till there are no more locks to acquire. Then it executes the
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215 | 68adfdb2 | Guido Trotter | given LU and its opcodes.
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216 | 68adfdb2 | Guido Trotter |
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217 | 68adfdb2 | Guido Trotter | """
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218 | ca2a79e1 | Guido Trotter | adding_locks = level in lu.add_locks
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219 | ca2a79e1 | Guido Trotter | acquiring_locks = level in lu.needed_locks
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220 | 8a2941c4 | Guido Trotter | if level not in locking.LEVELS: |
221 | 031a3e57 | Michael Hanselmann | if self._cbs: |
222 | 031a3e57 | Michael Hanselmann | self._cbs.NotifyStart()
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223 | 031a3e57 | Michael Hanselmann | |
224 | 8a2941c4 | Guido Trotter | result = self._ExecLU(lu)
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225 | ca2a79e1 | Guido Trotter | elif adding_locks and acquiring_locks: |
226 | ca2a79e1 | Guido Trotter | # We could both acquire and add locks at the same level, but for now we
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227 | ca2a79e1 | Guido Trotter | # don't need this, so we'll avoid the complicated code needed.
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228 | ca2a79e1 | Guido Trotter | raise NotImplementedError( |
229 | ca2a79e1 | Guido Trotter | "Can't declare locks to acquire when adding others")
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230 | ca2a79e1 | Guido Trotter | elif adding_locks or acquiring_locks: |
231 | fb8dcb62 | Guido Trotter | lu.DeclareLocks(level) |
232 | 3977a4c1 | Guido Trotter | share = lu.share_locks[level] |
233 | ca2a79e1 | Guido Trotter | if acquiring_locks:
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234 | ca2a79e1 | Guido Trotter | needed_locks = lu.needed_locks[level] |
235 | ef2df7d3 | Michael Hanselmann | |
236 | ef2df7d3 | Michael Hanselmann | self._ReportLocks(level, needed_locks, share, False) |
237 | ca2a79e1 | Guido Trotter | lu.acquired_locks[level] = self.context.glm.acquire(level,
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238 | ca2a79e1 | Guido Trotter | needed_locks, |
239 | ca2a79e1 | Guido Trotter | shared=share) |
240 | ef2df7d3 | Michael Hanselmann | self._ReportLocks(level, needed_locks, share, True) |
241 | ef2df7d3 | Michael Hanselmann | |
242 | ca2a79e1 | Guido Trotter | else: # adding_locks |
243 | ca2a79e1 | Guido Trotter | add_locks = lu.add_locks[level] |
244 | ca2a79e1 | Guido Trotter | lu.remove_locks[level] = add_locks |
245 | ca2a79e1 | Guido Trotter | try:
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246 | ca2a79e1 | Guido Trotter | self.context.glm.add(level, add_locks, acquired=1, shared=share) |
247 | ca2a79e1 | Guido Trotter | except errors.LockError:
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248 | ca2a79e1 | Guido Trotter | raise errors.OpPrereqError(
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249 | 5bbd3f7f | Michael Hanselmann | "Couldn't add locks (%s), probably because of a race condition"
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250 | ca2a79e1 | Guido Trotter | " with another job, who added them first" % add_locks)
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251 | 68adfdb2 | Guido Trotter | try:
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252 | ca2a79e1 | Guido Trotter | try:
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253 | ca2a79e1 | Guido Trotter | if adding_locks:
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254 | ca2a79e1 | Guido Trotter | lu.acquired_locks[level] = add_locks |
255 | ca2a79e1 | Guido Trotter | result = self._LockAndExecLU(lu, level + 1) |
256 | ca2a79e1 | Guido Trotter | finally:
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257 | ca2a79e1 | Guido Trotter | if level in lu.remove_locks: |
258 | ca2a79e1 | Guido Trotter | self.context.glm.remove(level, lu.remove_locks[level])
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259 | 68adfdb2 | Guido Trotter | finally:
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260 | 80ee04a4 | Guido Trotter | if self.context.glm.is_owned(level): |
261 | 68adfdb2 | Guido Trotter | self.context.glm.release(level)
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262 | 68adfdb2 | Guido Trotter | else:
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263 | 8a2941c4 | Guido Trotter | result = self._LockAndExecLU(lu, level + 1) |
264 | 68adfdb2 | Guido Trotter | |
265 | 68adfdb2 | Guido Trotter | return result
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266 | 68adfdb2 | Guido Trotter | |
267 | 031a3e57 | Michael Hanselmann | def ExecOpCode(self, op, cbs): |
268 | a8083063 | Iustin Pop | """Execute an opcode.
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269 | a8083063 | Iustin Pop |
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270 | e92376d7 | Iustin Pop | @type op: an OpCode instance
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271 | e92376d7 | Iustin Pop | @param op: the opcode to be executed
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272 | 031a3e57 | Michael Hanselmann | @type cbs: L{OpExecCbBase}
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273 | 031a3e57 | Michael Hanselmann | @param cbs: Runtime callbacks
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274 | a8083063 | Iustin Pop |
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275 | a8083063 | Iustin Pop | """
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276 | a8083063 | Iustin Pop | if not isinstance(op, opcodes.OpCode): |
277 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Non-opcode instance passed" |
278 | 3ecf6786 | Iustin Pop | " to ExecOpcode")
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279 | a8083063 | Iustin Pop | |
280 | 031a3e57 | Michael Hanselmann | self._cbs = cbs
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281 | fe482621 | Iustin Pop | try:
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282 | 031a3e57 | Michael Hanselmann | lu_class = self.DISPATCH_TABLE.get(op.__class__, None) |
283 | 031a3e57 | Michael Hanselmann | if lu_class is None: |
284 | 031a3e57 | Michael Hanselmann | raise errors.OpCodeUnknown("Unknown opcode") |
285 | 031a3e57 | Michael Hanselmann | |
286 | 031a3e57 | Michael Hanselmann | # Acquire the Big Ganeti Lock exclusively if this LU requires it, and in a
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287 | 031a3e57 | Michael Hanselmann | # shared fashion otherwise (to prevent concurrent run with an exclusive
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288 | 031a3e57 | Michael Hanselmann | # LU.
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289 | ef2df7d3 | Michael Hanselmann | self._ReportLocks(locking.LEVEL_CLUSTER, [locking.BGL],
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290 | ef2df7d3 | Michael Hanselmann | not lu_class.REQ_BGL, False) |
291 | ef2df7d3 | Michael Hanselmann | try:
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292 | ef2df7d3 | Michael Hanselmann | self.context.glm.acquire(locking.LEVEL_CLUSTER, [locking.BGL],
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293 | ef2df7d3 | Michael Hanselmann | shared=not lu_class.REQ_BGL)
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294 | ef2df7d3 | Michael Hanselmann | finally:
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295 | ef2df7d3 | Michael Hanselmann | self._ReportLocks(locking.LEVEL_CLUSTER, [locking.BGL],
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296 | ef2df7d3 | Michael Hanselmann | not lu_class.REQ_BGL, True) |
297 | 031a3e57 | Michael Hanselmann | try:
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298 | 031a3e57 | Michael Hanselmann | self.exclusive_BGL = lu_class.REQ_BGL
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299 | 031a3e57 | Michael Hanselmann | lu = lu_class(self, op, self.context, self.rpc) |
300 | 031a3e57 | Michael Hanselmann | lu.ExpandNames() |
301 | 031a3e57 | Michael Hanselmann | assert lu.needed_locks is not None, "needed_locks not set by LU" |
302 | 031a3e57 | Michael Hanselmann | result = self._LockAndExecLU(lu, locking.LEVEL_INSTANCE)
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303 | 031a3e57 | Michael Hanselmann | finally:
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304 | 031a3e57 | Michael Hanselmann | self.context.glm.release(locking.LEVEL_CLUSTER)
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305 | 031a3e57 | Michael Hanselmann | self.exclusive_BGL = False |
306 | 04864530 | Guido Trotter | finally:
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307 | 031a3e57 | Michael Hanselmann | self._cbs = None |
308 | 6a4aa7c1 | Iustin Pop | |
309 | a8083063 | Iustin Pop | return result
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310 | a8083063 | Iustin Pop | |
311 | 031a3e57 | Michael Hanselmann | def _Feedback(self, *args): |
312 | 031a3e57 | Michael Hanselmann | """Forward call to feedback callback function.
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313 | 031a3e57 | Michael Hanselmann |
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314 | 031a3e57 | Michael Hanselmann | """
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315 | 031a3e57 | Michael Hanselmann | if self._cbs: |
316 | 031a3e57 | Michael Hanselmann | self._cbs.Feedback(*args)
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317 | 031a3e57 | Michael Hanselmann | |
318 | 0fbbf897 | Iustin Pop | def LogStep(self, current, total, message): |
319 | 0fbbf897 | Iustin Pop | """Log a change in LU execution progress.
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320 | 0fbbf897 | Iustin Pop |
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321 | 0fbbf897 | Iustin Pop | """
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322 | a5eb7789 | Iustin Pop | logging.debug("Step %d/%d %s", current, total, message)
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323 | 031a3e57 | Michael Hanselmann | self._Feedback("STEP %d/%d %s" % (current, total, message)) |
324 | 0fbbf897 | Iustin Pop | |
325 | c0088fb9 | Iustin Pop | def LogWarning(self, message, *args, **kwargs): |
326 | 0fbbf897 | Iustin Pop | """Log a warning to the logs and the user.
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327 | 0fbbf897 | Iustin Pop |
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328 | c0088fb9 | Iustin Pop | The optional keyword argument is 'hint' and can be used to show a
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329 | c0088fb9 | Iustin Pop | hint to the user (presumably related to the warning). If the
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330 | c0088fb9 | Iustin Pop | message is empty, it will not be printed at all, allowing one to
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331 | c0088fb9 | Iustin Pop | show only a hint.
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332 | 0fbbf897 | Iustin Pop |
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333 | c0088fb9 | Iustin Pop | """
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334 | c0088fb9 | Iustin Pop | assert not kwargs or (len(kwargs) == 1 and "hint" in kwargs), \ |
335 | c0088fb9 | Iustin Pop | "Invalid keyword arguments for LogWarning (%s)" % str(kwargs) |
336 | c0088fb9 | Iustin Pop | if args:
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337 | c0088fb9 | Iustin Pop | message = message % tuple(args)
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338 | c0088fb9 | Iustin Pop | if message:
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339 | c0088fb9 | Iustin Pop | logging.warning(message) |
340 | 031a3e57 | Michael Hanselmann | self._Feedback(" - WARNING: %s" % message) |
341 | c0088fb9 | Iustin Pop | if "hint" in kwargs: |
342 | 031a3e57 | Michael Hanselmann | self._Feedback(" Hint: %s" % kwargs["hint"]) |
343 | c0088fb9 | Iustin Pop | |
344 | c0088fb9 | Iustin Pop | def LogInfo(self, message, *args): |
345 | 0fbbf897 | Iustin Pop | """Log an informational message to the logs and the user.
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346 | 0fbbf897 | Iustin Pop |
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347 | 0fbbf897 | Iustin Pop | """
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348 | c0088fb9 | Iustin Pop | if args:
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349 | c0088fb9 | Iustin Pop | message = message % tuple(args)
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350 | a5eb7789 | Iustin Pop | logging.info(message) |
351 | 031a3e57 | Michael Hanselmann | self._Feedback(" - INFO: %s" % message) |
352 | 0fbbf897 | Iustin Pop | |
353 | a8083063 | Iustin Pop | |
354 | a8083063 | Iustin Pop | class HooksMaster(object): |
355 | a8083063 | Iustin Pop | """Hooks master.
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356 | a8083063 | Iustin Pop |
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357 | a8083063 | Iustin Pop | This class distributes the run commands to the nodes based on the
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358 | a8083063 | Iustin Pop | specific LU class.
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359 | a8083063 | Iustin Pop |
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360 | a8083063 | Iustin Pop | In order to remove the direct dependency on the rpc module, the
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361 | a8083063 | Iustin Pop | constructor needs a function which actually does the remote
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362 | a8083063 | Iustin Pop | call. This will usually be rpc.call_hooks_runner, but any function
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363 | a8083063 | Iustin Pop | which behaves the same works.
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364 | a8083063 | Iustin Pop |
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365 | a8083063 | Iustin Pop | """
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366 | 4b5e8271 | Iustin Pop | def __init__(self, callfn, lu): |
367 | a8083063 | Iustin Pop | self.callfn = callfn
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368 | a8083063 | Iustin Pop | self.lu = lu
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369 | a8083063 | Iustin Pop | self.op = lu.op
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370 | a8083063 | Iustin Pop | self.env, node_list_pre, node_list_post = self._BuildEnv() |
371 | a8083063 | Iustin Pop | self.node_list = {constants.HOOKS_PHASE_PRE: node_list_pre,
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372 | a8083063 | Iustin Pop | constants.HOOKS_PHASE_POST: node_list_post} |
373 | a8083063 | Iustin Pop | |
374 | a8083063 | Iustin Pop | def _BuildEnv(self): |
375 | a8083063 | Iustin Pop | """Compute the environment and the target nodes.
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376 | a8083063 | Iustin Pop |
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377 | a8083063 | Iustin Pop | Based on the opcode and the current node list, this builds the
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378 | a8083063 | Iustin Pop | environment for the hooks and the target node list for the run.
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379 | a8083063 | Iustin Pop |
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380 | a8083063 | Iustin Pop | """
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381 | a8083063 | Iustin Pop | env = { |
382 | a8083063 | Iustin Pop | "PATH": "/sbin:/bin:/usr/sbin:/usr/bin", |
383 | a8083063 | Iustin Pop | "GANETI_HOOKS_VERSION": constants.HOOKS_VERSION,
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384 | a8083063 | Iustin Pop | "GANETI_OP_CODE": self.op.OP_ID, |
385 | a8083063 | Iustin Pop | "GANETI_OBJECT_TYPE": self.lu.HTYPE, |
386 | 6a4aa7c1 | Iustin Pop | "GANETI_DATA_DIR": constants.DATA_DIR,
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387 | a8083063 | Iustin Pop | } |
388 | a8083063 | Iustin Pop | |
389 | 9a395a76 | Iustin Pop | if self.lu.HPATH is not None: |
390 | 9a395a76 | Iustin Pop | lu_env, lu_nodes_pre, lu_nodes_post = self.lu.BuildHooksEnv()
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391 | 9a395a76 | Iustin Pop | if lu_env:
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392 | 9a395a76 | Iustin Pop | for key in lu_env: |
393 | 9a395a76 | Iustin Pop | env["GANETI_" + key] = lu_env[key]
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394 | 9a395a76 | Iustin Pop | else:
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395 | 9a395a76 | Iustin Pop | lu_nodes_pre = lu_nodes_post = [] |
396 | a8083063 | Iustin Pop | |
397 | 4167825b | Iustin Pop | return env, frozenset(lu_nodes_pre), frozenset(lu_nodes_post) |
398 | 4167825b | Iustin Pop | |
399 | 4167825b | Iustin Pop | def _RunWrapper(self, node_list, hpath, phase): |
400 | 4167825b | Iustin Pop | """Simple wrapper over self.callfn.
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401 | 4167825b | Iustin Pop |
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402 | 4167825b | Iustin Pop | This method fixes the environment before doing the rpc call.
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403 | 4167825b | Iustin Pop |
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404 | 4167825b | Iustin Pop | """
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405 | 4167825b | Iustin Pop | env = self.env.copy()
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406 | 4167825b | Iustin Pop | env["GANETI_HOOKS_PHASE"] = phase
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407 | 4167825b | Iustin Pop | env["GANETI_HOOKS_PATH"] = hpath
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408 | 437138c9 | Michael Hanselmann | if self.lu.cfg is not None: |
409 | 437138c9 | Michael Hanselmann | env["GANETI_CLUSTER"] = self.lu.cfg.GetClusterName() |
410 | 437138c9 | Michael Hanselmann | env["GANETI_MASTER"] = self.lu.cfg.GetMasterNode() |
411 | a8083063 | Iustin Pop | |
412 | 4167825b | Iustin Pop | env = dict([(str(key), str(val)) for key, val in env.iteritems()]) |
413 | a8083063 | Iustin Pop | |
414 | 4167825b | Iustin Pop | return self.callfn(node_list, hpath, phase, env) |
415 | a8083063 | Iustin Pop | |
416 | 17e82923 | Luca Bigliardi | def RunPhase(self, phase, nodes=None): |
417 | a8083063 | Iustin Pop | """Run all the scripts for a phase.
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418 | a8083063 | Iustin Pop |
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419 | a8083063 | Iustin Pop | This is the main function of the HookMaster.
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420 | a8083063 | Iustin Pop |
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421 | 8dca23a3 | Iustin Pop | @param phase: one of L{constants.HOOKS_PHASE_POST} or
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422 | 8dca23a3 | Iustin Pop | L{constants.HOOKS_PHASE_PRE}; it denotes the hooks phase
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423 | 17e82923 | Luca Bigliardi | @param nodes: overrides the predefined list of nodes for the given phase
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424 | 8dca23a3 | Iustin Pop | @return: the processed results of the hooks multi-node rpc call
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425 | 8dca23a3 | Iustin Pop | @raise errors.HooksFailure: on communication failure to the nodes
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426 | 6ef2dc74 | Luca Bigliardi | @raise errors.HooksAbort: on failure of one of the hooks
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427 | b07a6922 | Guido Trotter |
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428 | a8083063 | Iustin Pop | """
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429 | 17e82923 | Luca Bigliardi | if not self.node_list[phase] and not nodes: |
430 | 9a395a76 | Iustin Pop | # empty node list, we should not attempt to run this as either
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431 | 9a395a76 | Iustin Pop | # we're in the cluster init phase and the rpc client part can't
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432 | 9a395a76 | Iustin Pop | # even attempt to run, or this LU doesn't do hooks at all
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433 | a8083063 | Iustin Pop | return
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434 | 4167825b | Iustin Pop | hpath = self.lu.HPATH
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435 | 17e82923 | Luca Bigliardi | if nodes is not None: |
436 | 17e82923 | Luca Bigliardi | results = self._RunWrapper(nodes, hpath, phase)
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437 | 17e82923 | Luca Bigliardi | else:
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438 | 17e82923 | Luca Bigliardi | results = self._RunWrapper(self.node_list[phase], hpath, phase) |
439 | 8c4b9364 | Luca Bigliardi | errs = [] |
440 | 8c4b9364 | Luca Bigliardi | if not results: |
441 | 8c4b9364 | Luca Bigliardi | msg = "Communication Failure"
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442 | 8c4b9364 | Luca Bigliardi | if phase == constants.HOOKS_PHASE_PRE:
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443 | 8c4b9364 | Luca Bigliardi | raise errors.HooksFailure(msg)
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444 | 8c4b9364 | Luca Bigliardi | else:
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445 | 8c4b9364 | Luca Bigliardi | self.lu.LogWarning(msg)
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446 | 640b961e | Luca Bigliardi | return results
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447 | 8c4b9364 | Luca Bigliardi | for node_name in results: |
448 | 8c4b9364 | Luca Bigliardi | res = results[node_name] |
449 | 8c4b9364 | Luca Bigliardi | if res.offline:
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450 | 8c4b9364 | Luca Bigliardi | continue
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451 | 3cebe102 | Michael Hanselmann | msg = res.fail_msg |
452 | 8c4b9364 | Luca Bigliardi | if msg:
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453 | 8c4b9364 | Luca Bigliardi | self.lu.LogWarning("Communication failure to node %s: %s", |
454 | 8c4b9364 | Luca Bigliardi | node_name, msg) |
455 | 8c4b9364 | Luca Bigliardi | continue
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456 | 8c4b9364 | Luca Bigliardi | for script, hkr, output in res.payload: |
457 | 8c4b9364 | Luca Bigliardi | if hkr == constants.HKR_FAIL:
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458 | 8c4b9364 | Luca Bigliardi | if phase == constants.HOOKS_PHASE_PRE:
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459 | a8083063 | Iustin Pop | errs.append((node_name, script, output)) |
460 | 8c4b9364 | Luca Bigliardi | else:
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461 | 8c4b9364 | Luca Bigliardi | if not output: |
462 | 640b961e | Luca Bigliardi | output = "(no output)"
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463 | 8c4b9364 | Luca Bigliardi | self.lu.LogWarning("On %s script %s failed, output: %s" % |
464 | 8c4b9364 | Luca Bigliardi | (node_name, script, output)) |
465 | 8c4b9364 | Luca Bigliardi | if errs and phase == constants.HOOKS_PHASE_PRE: |
466 | 8c4b9364 | Luca Bigliardi | raise errors.HooksAbort(errs)
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467 | b07a6922 | Guido Trotter | return results
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468 | 6a4aa7c1 | Iustin Pop | |
469 | 6a4aa7c1 | Iustin Pop | def RunConfigUpdate(self): |
470 | 6a4aa7c1 | Iustin Pop | """Run the special configuration update hook
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471 | 6a4aa7c1 | Iustin Pop |
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472 | 6a4aa7c1 | Iustin Pop | This is a special hook that runs only on the master after each
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473 | 6a4aa7c1 | Iustin Pop | top-level LI if the configuration has been updated.
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474 | 6a4aa7c1 | Iustin Pop |
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475 | 6a4aa7c1 | Iustin Pop | """
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476 | 6a4aa7c1 | Iustin Pop | phase = constants.HOOKS_PHASE_POST |
477 | 6a4aa7c1 | Iustin Pop | hpath = constants.HOOKS_NAME_CFGUPDATE |
478 | 437138c9 | Michael Hanselmann | nodes = [self.lu.cfg.GetMasterNode()]
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479 | 29921401 | Iustin Pop | self._RunWrapper(nodes, hpath, phase) |