root / lib / mcpu.py @ 6a4aa7c1
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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 | a8083063 | Iustin Pop | |
32 | a8083063 | Iustin Pop | from ganeti import opcodes |
33 | a8083063 | Iustin Pop | from ganeti import constants |
34 | a8083063 | Iustin Pop | from ganeti import errors |
35 | a8083063 | Iustin Pop | from ganeti import rpc |
36 | a8083063 | Iustin Pop | from ganeti import cmdlib |
37 | a8083063 | Iustin Pop | from ganeti import config |
38 | a8083063 | Iustin Pop | from ganeti import ssconf |
39 | a8083063 | Iustin Pop | |
40 | a8083063 | Iustin Pop | class Processor(object): |
41 | a8083063 | Iustin Pop | """Object which runs OpCodes"""
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42 | a8083063 | Iustin Pop | DISPATCH_TABLE = { |
43 | a8083063 | Iustin Pop | # Cluster
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44 | a8083063 | Iustin Pop | opcodes.OpInitCluster: cmdlib.LUInitCluster, |
45 | a8083063 | Iustin Pop | opcodes.OpDestroyCluster: cmdlib.LUDestroyCluster, |
46 | a8083063 | Iustin Pop | opcodes.OpQueryClusterInfo: cmdlib.LUQueryClusterInfo, |
47 | a8083063 | Iustin Pop | opcodes.OpClusterCopyFile: cmdlib.LUClusterCopyFile, |
48 | a8083063 | Iustin Pop | opcodes.OpRunClusterCommand: cmdlib.LURunClusterCommand, |
49 | a8083063 | Iustin Pop | opcodes.OpVerifyCluster: cmdlib.LUVerifyCluster, |
50 | a8083063 | Iustin Pop | opcodes.OpMasterFailover: cmdlib.LUMasterFailover, |
51 | a8083063 | Iustin Pop | opcodes.OpDumpClusterConfig: cmdlib.LUDumpClusterConfig, |
52 | 07bd8a51 | Iustin Pop | opcodes.OpRenameCluster: cmdlib.LURenameCluster, |
53 | a8083063 | Iustin Pop | # node lu
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54 | a8083063 | Iustin Pop | opcodes.OpAddNode: cmdlib.LUAddNode, |
55 | a8083063 | Iustin Pop | opcodes.OpQueryNodes: cmdlib.LUQueryNodes, |
56 | dcb93971 | Michael Hanselmann | opcodes.OpQueryNodeVolumes: cmdlib.LUQueryNodeVolumes, |
57 | a8083063 | Iustin Pop | opcodes.OpRemoveNode: cmdlib.LURemoveNode, |
58 | a8083063 | Iustin Pop | # instance lu
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59 | a8083063 | Iustin Pop | opcodes.OpCreateInstance: cmdlib.LUCreateInstance, |
60 | fe7b0351 | Michael Hanselmann | opcodes.OpReinstallInstance: cmdlib.LUReinstallInstance, |
61 | a8083063 | Iustin Pop | opcodes.OpRemoveInstance: cmdlib.LURemoveInstance, |
62 | decd5f45 | Iustin Pop | opcodes.OpRenameInstance: cmdlib.LURenameInstance, |
63 | a8083063 | Iustin Pop | opcodes.OpActivateInstanceDisks: cmdlib.LUActivateInstanceDisks, |
64 | a8083063 | Iustin Pop | opcodes.OpShutdownInstance: cmdlib.LUShutdownInstance, |
65 | a8083063 | Iustin Pop | opcodes.OpStartupInstance: cmdlib.LUStartupInstance, |
66 | a8083063 | Iustin Pop | opcodes.OpDeactivateInstanceDisks: cmdlib.LUDeactivateInstanceDisks, |
67 | a8083063 | Iustin Pop | opcodes.OpAddMDDRBDComponent: cmdlib.LUAddMDDRBDComponent, |
68 | a8083063 | Iustin Pop | opcodes.OpRemoveMDDRBDComponent: cmdlib.LURemoveMDDRBDComponent, |
69 | a8083063 | Iustin Pop | opcodes.OpReplaceDisks: cmdlib.LUReplaceDisks, |
70 | a8083063 | Iustin Pop | opcodes.OpFailoverInstance: cmdlib.LUFailoverInstance, |
71 | a8083063 | Iustin Pop | opcodes.OpConnectConsole: cmdlib.LUConnectConsole, |
72 | a8083063 | Iustin Pop | opcodes.OpQueryInstances: cmdlib.LUQueryInstances, |
73 | a8083063 | Iustin Pop | opcodes.OpQueryInstanceData: cmdlib.LUQueryInstanceData, |
74 | a8083063 | Iustin Pop | opcodes.OpSetInstanceParms: cmdlib.LUSetInstanceParms, |
75 | a8083063 | Iustin Pop | # os lu
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76 | a8083063 | Iustin Pop | opcodes.OpDiagnoseOS: cmdlib.LUDiagnoseOS, |
77 | a8083063 | Iustin Pop | # exports lu
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78 | a8083063 | Iustin Pop | opcodes.OpQueryExports: cmdlib.LUQueryExports, |
79 | a8083063 | Iustin Pop | opcodes.OpExportInstance: cmdlib.LUExportInstance, |
80 | 5c947f38 | Iustin Pop | # tags lu
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81 | 5c947f38 | Iustin Pop | opcodes.OpGetTags: cmdlib.LUGetTags, |
82 | f27302fa | Iustin Pop | opcodes.OpAddTags: cmdlib.LUAddTags, |
83 | f27302fa | Iustin Pop | opcodes.OpDelTags: cmdlib.LUDelTags, |
84 | a8083063 | Iustin Pop | } |
85 | a8083063 | Iustin Pop | |
86 | a8083063 | Iustin Pop | |
87 | a8083063 | Iustin Pop | def __init__(self): |
88 | a8083063 | Iustin Pop | """Constructor for Processor
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89 | a8083063 | Iustin Pop |
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90 | a8083063 | Iustin Pop | """
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91 | a8083063 | Iustin Pop | self.cfg = None |
92 | a8083063 | Iustin Pop | self.sstore = None |
93 | a8083063 | Iustin Pop | |
94 | a8083063 | Iustin Pop | def ExecOpCode(self, op, feedback_fn): |
95 | a8083063 | Iustin Pop | """Execute an opcode.
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96 | a8083063 | Iustin Pop |
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97 | a8083063 | Iustin Pop | Args:
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98 | a8083063 | Iustin Pop | - cfg: the configuration in which we execute this opcode
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99 | a8083063 | Iustin Pop | - opcode: the opcode to be executed
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100 | a8083063 | Iustin Pop | - feedback_fn: the feedback function (taking one string) to be run when
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101 | a8083063 | Iustin Pop | interesting events are happening
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102 | a8083063 | Iustin Pop |
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103 | a8083063 | Iustin Pop | """
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104 | a8083063 | Iustin Pop | if not isinstance(op, opcodes.OpCode): |
105 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Non-opcode instance passed" |
106 | 3ecf6786 | Iustin Pop | " to ExecOpcode")
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107 | a8083063 | Iustin Pop | |
108 | a8083063 | Iustin Pop | lu_class = self.DISPATCH_TABLE.get(op.__class__, None) |
109 | a8083063 | Iustin Pop | if lu_class is None: |
110 | 3ecf6786 | Iustin Pop | raise errors.OpCodeUnknown("Unknown opcode") |
111 | a8083063 | Iustin Pop | |
112 | a8083063 | Iustin Pop | if lu_class.REQ_CLUSTER and self.cfg is None: |
113 | a8083063 | Iustin Pop | self.cfg = config.ConfigWriter()
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114 | a8083063 | Iustin Pop | self.sstore = ssconf.SimpleStore()
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115 | 6a4aa7c1 | Iustin Pop | if self.cfg is not None: |
116 | 6a4aa7c1 | Iustin Pop | write_count = self.cfg.write_count
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117 | 6a4aa7c1 | Iustin Pop | else:
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118 | 6a4aa7c1 | Iustin Pop | write_count = 0
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119 | a8083063 | Iustin Pop | lu = lu_class(self, op, self.cfg, self.sstore) |
120 | a8083063 | Iustin Pop | lu.CheckPrereq() |
121 | 9a395a76 | Iustin Pop | hm = HooksMaster(rpc.call_hooks_runner, lu) |
122 | 9a395a76 | Iustin Pop | hm.RunPhase(constants.HOOKS_PHASE_PRE) |
123 | a8083063 | Iustin Pop | result = lu.Exec(feedback_fn) |
124 | 9a395a76 | Iustin Pop | hm.RunPhase(constants.HOOKS_PHASE_POST) |
125 | 6a4aa7c1 | Iustin Pop | if lu.cfg is not None: |
126 | 6a4aa7c1 | Iustin Pop | # we use lu.cfg and not self.cfg as for init cluster, self.cfg
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127 | 6a4aa7c1 | Iustin Pop | # is None but lu.cfg has been recently initialized in the
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128 | 6a4aa7c1 | Iustin Pop | # lu.Exec method
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129 | 6a4aa7c1 | Iustin Pop | if write_count != lu.cfg.write_count:
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130 | 6a4aa7c1 | Iustin Pop | hm.RunConfigUpdate() |
131 | 6a4aa7c1 | Iustin Pop | |
132 | a8083063 | Iustin Pop | return result
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133 | a8083063 | Iustin Pop | |
134 | a8083063 | Iustin Pop | def ChainOpCode(self, op, feedback_fn): |
135 | a8083063 | Iustin Pop | """Chain and execute an opcode.
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136 | a8083063 | Iustin Pop |
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137 | a8083063 | Iustin Pop | This is used by LUs when they need to execute a child LU.
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138 | a8083063 | Iustin Pop |
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139 | a8083063 | Iustin Pop | Args:
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140 | a8083063 | Iustin Pop | - opcode: the opcode to be executed
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141 | a8083063 | Iustin Pop | - feedback_fn: the feedback function (taking one string) to be run when
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142 | a8083063 | Iustin Pop | interesting events are happening
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143 | a8083063 | Iustin Pop |
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144 | a8083063 | Iustin Pop | """
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145 | a8083063 | Iustin Pop | if not isinstance(op, opcodes.OpCode): |
146 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Non-opcode instance passed" |
147 | 3ecf6786 | Iustin Pop | " to ExecOpcode")
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148 | a8083063 | Iustin Pop | |
149 | a8083063 | Iustin Pop | lu_class = self.DISPATCH_TABLE.get(op.__class__, None) |
150 | a8083063 | Iustin Pop | if lu_class is None: |
151 | 3ecf6786 | Iustin Pop | raise errors.OpCodeUnknown("Unknown opcode") |
152 | a8083063 | Iustin Pop | |
153 | a8083063 | Iustin Pop | if lu_class.REQ_CLUSTER and self.cfg is None: |
154 | a8083063 | Iustin Pop | self.cfg = config.ConfigWriter()
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155 | a8083063 | Iustin Pop | self.sstore = ssconf.SimpleStore()
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156 | f97a6b10 | Iustin Pop | #do_hooks = lu_class.HPATH is not None
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157 | a8083063 | Iustin Pop | lu = lu_class(self, op, self.cfg, self.sstore) |
158 | a8083063 | Iustin Pop | lu.CheckPrereq() |
159 | a8083063 | Iustin Pop | #if do_hooks:
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160 | f97a6b10 | Iustin Pop | # hm = HooksMaster(rpc.call_hooks_runner, lu)
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161 | a8083063 | Iustin Pop | # hm.RunPhase(constants.HOOKS_PHASE_PRE)
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162 | a8083063 | Iustin Pop | result = lu.Exec(feedback_fn) |
163 | a8083063 | Iustin Pop | #if do_hooks:
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164 | a8083063 | Iustin Pop | # hm.RunPhase(constants.HOOKS_PHASE_POST)
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165 | a8083063 | Iustin Pop | return result
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166 | a8083063 | Iustin Pop | |
167 | a8083063 | Iustin Pop | |
168 | a8083063 | Iustin Pop | class HooksMaster(object): |
169 | a8083063 | Iustin Pop | """Hooks master.
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170 | a8083063 | Iustin Pop |
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171 | a8083063 | Iustin Pop | This class distributes the run commands to the nodes based on the
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172 | a8083063 | Iustin Pop | specific LU class.
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173 | a8083063 | Iustin Pop |
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174 | a8083063 | Iustin Pop | In order to remove the direct dependency on the rpc module, the
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175 | a8083063 | Iustin Pop | constructor needs a function which actually does the remote
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176 | a8083063 | Iustin Pop | call. This will usually be rpc.call_hooks_runner, but any function
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177 | a8083063 | Iustin Pop | which behaves the same works.
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178 | a8083063 | Iustin Pop |
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179 | a8083063 | Iustin Pop | """
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180 | f97a6b10 | Iustin Pop | def __init__(self, callfn, lu): |
181 | a8083063 | Iustin Pop | self.callfn = callfn
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182 | a8083063 | Iustin Pop | self.lu = lu
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183 | a8083063 | Iustin Pop | self.op = lu.op
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184 | a8083063 | Iustin Pop | self.env, node_list_pre, node_list_post = self._BuildEnv() |
185 | a8083063 | Iustin Pop | self.node_list = {constants.HOOKS_PHASE_PRE: node_list_pre,
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186 | a8083063 | Iustin Pop | constants.HOOKS_PHASE_POST: node_list_post} |
187 | a8083063 | Iustin Pop | |
188 | a8083063 | Iustin Pop | def _BuildEnv(self): |
189 | a8083063 | Iustin Pop | """Compute the environment and the target nodes.
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190 | a8083063 | Iustin Pop |
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191 | a8083063 | Iustin Pop | Based on the opcode and the current node list, this builds the
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192 | a8083063 | Iustin Pop | environment for the hooks and the target node list for the run.
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193 | a8083063 | Iustin Pop |
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194 | a8083063 | Iustin Pop | """
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195 | a8083063 | Iustin Pop | env = { |
196 | a8083063 | Iustin Pop | "PATH": "/sbin:/bin:/usr/sbin:/usr/bin", |
197 | a8083063 | Iustin Pop | "GANETI_HOOKS_VERSION": constants.HOOKS_VERSION,
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198 | a8083063 | Iustin Pop | "GANETI_OP_CODE": self.op.OP_ID, |
199 | a8083063 | Iustin Pop | "GANETI_OBJECT_TYPE": self.lu.HTYPE, |
200 | 6a4aa7c1 | Iustin Pop | "GANETI_DATA_DIR": constants.DATA_DIR,
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201 | a8083063 | Iustin Pop | } |
202 | a8083063 | Iustin Pop | |
203 | 9a395a76 | Iustin Pop | if self.lu.HPATH is not None: |
204 | 9a395a76 | Iustin Pop | lu_env, lu_nodes_pre, lu_nodes_post = self.lu.BuildHooksEnv()
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205 | 9a395a76 | Iustin Pop | if lu_env:
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206 | 9a395a76 | Iustin Pop | for key in lu_env: |
207 | 9a395a76 | Iustin Pop | env["GANETI_" + key] = lu_env[key]
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208 | 9a395a76 | Iustin Pop | else:
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209 | 9a395a76 | Iustin Pop | lu_nodes_pre = lu_nodes_post = [] |
210 | a8083063 | Iustin Pop | |
211 | 4167825b | Iustin Pop | return env, frozenset(lu_nodes_pre), frozenset(lu_nodes_post) |
212 | 4167825b | Iustin Pop | |
213 | 4167825b | Iustin Pop | def _RunWrapper(self, node_list, hpath, phase): |
214 | 4167825b | Iustin Pop | """Simple wrapper over self.callfn.
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215 | 4167825b | Iustin Pop |
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216 | 4167825b | Iustin Pop | This method fixes the environment before doing the rpc call.
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217 | 4167825b | Iustin Pop |
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218 | 4167825b | Iustin Pop | """
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219 | 4167825b | Iustin Pop | env = self.env.copy()
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220 | 4167825b | Iustin Pop | env["GANETI_HOOKS_PHASE"] = phase
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221 | 4167825b | Iustin Pop | env["GANETI_HOOKS_PATH"] = hpath
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222 | f97a6b10 | Iustin Pop | if self.lu.sstore is not None: |
223 | f97a6b10 | Iustin Pop | env["GANETI_CLUSTER"] = self.lu.sstore.GetClusterName() |
224 | f97a6b10 | Iustin Pop | env["GANETI_MASTER"] = self.lu.sstore.GetMasterNode() |
225 | a8083063 | Iustin Pop | |
226 | 4167825b | Iustin Pop | env = dict([(str(key), str(val)) for key, val in env.iteritems()]) |
227 | a8083063 | Iustin Pop | |
228 | 4167825b | Iustin Pop | return self.callfn(node_list, hpath, phase, env) |
229 | a8083063 | Iustin Pop | |
230 | a8083063 | Iustin Pop | def RunPhase(self, phase): |
231 | a8083063 | Iustin Pop | """Run all the scripts for a phase.
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232 | a8083063 | Iustin Pop |
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233 | a8083063 | Iustin Pop | This is the main function of the HookMaster.
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234 | a8083063 | Iustin Pop |
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235 | a8083063 | Iustin Pop | """
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236 | a8083063 | Iustin Pop | if not self.node_list[phase]: |
237 | 9a395a76 | Iustin Pop | # empty node list, we should not attempt to run this as either
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238 | 9a395a76 | Iustin Pop | # we're in the cluster init phase and the rpc client part can't
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239 | 9a395a76 | Iustin Pop | # even attempt to run, or this LU doesn't do hooks at all
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240 | a8083063 | Iustin Pop | return
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241 | 4167825b | Iustin Pop | hpath = self.lu.HPATH
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242 | 4167825b | Iustin Pop | results = self._RunWrapper(self.node_list[phase], hpath, phase) |
243 | a8083063 | Iustin Pop | if phase == constants.HOOKS_PHASE_PRE:
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244 | a8083063 | Iustin Pop | errs = [] |
245 | a8083063 | Iustin Pop | if not results: |
246 | 3ecf6786 | Iustin Pop | raise errors.HooksFailure("Communication failure") |
247 | a8083063 | Iustin Pop | for node_name in results: |
248 | a8083063 | Iustin Pop | res = results[node_name] |
249 | a8083063 | Iustin Pop | if res is False or not isinstance(res, list): |
250 | 3ecf6786 | Iustin Pop | raise errors.HooksFailure("Communication failure to node %s" % |
251 | 3ecf6786 | Iustin Pop | node_name) |
252 | a8083063 | Iustin Pop | for script, hkr, output in res: |
253 | a8083063 | Iustin Pop | if hkr == constants.HKR_FAIL:
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254 | a8083063 | Iustin Pop | output = output.strip().encode("string_escape")
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255 | a8083063 | Iustin Pop | errs.append((node_name, script, output)) |
256 | a8083063 | Iustin Pop | if errs:
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257 | 3ecf6786 | Iustin Pop | raise errors.HooksAbort(errs)
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258 | 6a4aa7c1 | Iustin Pop | |
259 | 6a4aa7c1 | Iustin Pop | def RunConfigUpdate(self): |
260 | 6a4aa7c1 | Iustin Pop | """Run the special configuration update hook
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261 | 6a4aa7c1 | Iustin Pop |
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262 | 6a4aa7c1 | Iustin Pop | This is a special hook that runs only on the master after each
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263 | 6a4aa7c1 | Iustin Pop | top-level LI if the configuration has been updated.
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264 | 6a4aa7c1 | Iustin Pop |
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265 | 6a4aa7c1 | Iustin Pop | """
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266 | 6a4aa7c1 | Iustin Pop | phase = constants.HOOKS_PHASE_POST |
267 | 6a4aa7c1 | Iustin Pop | hpath = constants.HOOKS_NAME_CFGUPDATE |
268 | 6a4aa7c1 | Iustin Pop | if self.lu.sstore is None: |
269 | 6a4aa7c1 | Iustin Pop | raise errors.ProgrammerError("Null sstore on config update hook") |
270 | 6a4aa7c1 | Iustin Pop | nodes = [self.lu.sstore.GetMasterNode()]
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271 | 6a4aa7c1 | Iustin Pop | results = self._RunWrapper(nodes, hpath, phase) |