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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 | """Ganeti exception handling"""
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23 | a8083063 | Iustin Pop | |
24 | a8083063 | Iustin Pop | |
25 | a8083063 | Iustin Pop | class GenericError(Exception): |
26 | a8083063 | Iustin Pop | """Base exception for Ganeti.
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27 | a8083063 | Iustin Pop |
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28 | a8083063 | Iustin Pop | """
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29 | a8083063 | Iustin Pop | pass
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30 | a8083063 | Iustin Pop | |
31 | a8083063 | Iustin Pop | |
32 | a8083063 | Iustin Pop | class LVMError(GenericError): |
33 | a8083063 | Iustin Pop | """LVM-related exception.
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34 | a8083063 | Iustin Pop |
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35 | a8083063 | Iustin Pop | This exception codifies problems with LVM setup.
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36 | a8083063 | Iustin Pop |
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37 | a8083063 | Iustin Pop | """
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38 | a8083063 | Iustin Pop | pass
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39 | a8083063 | Iustin Pop | |
40 | a8083063 | Iustin Pop | |
41 | a8083063 | Iustin Pop | class LockError(GenericError): |
42 | a8083063 | Iustin Pop | """Lock error exception.
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43 | a8083063 | Iustin Pop |
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44 | a8083063 | Iustin Pop | This signifies problems in the locking subsystem.
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45 | a8083063 | Iustin Pop |
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46 | a8083063 | Iustin Pop | """
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47 | a8083063 | Iustin Pop | pass
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48 | a8083063 | Iustin Pop | |
49 | a8083063 | Iustin Pop | |
50 | a8083063 | Iustin Pop | class HypervisorError(GenericError): |
51 | a8083063 | Iustin Pop | """Hypervisor-related exception.
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52 | a8083063 | Iustin Pop |
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53 | a8083063 | Iustin Pop | This is raised in case we can't communicate with the hypervisor
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54 | a8083063 | Iustin Pop | properly.
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55 | a8083063 | Iustin Pop |
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56 | a8083063 | Iustin Pop | """
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57 | a8083063 | Iustin Pop | pass
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58 | a8083063 | Iustin Pop | |
59 | a8083063 | Iustin Pop | |
60 | a8083063 | Iustin Pop | class ProgrammerError(GenericError): |
61 | a8083063 | Iustin Pop | """Programming-related error.
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62 | a8083063 | Iustin Pop |
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63 | a8083063 | Iustin Pop | This is raised in cases we determine that the calling conventions
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64 | a8083063 | Iustin Pop | have been violated, meaning we got some desynchronisation between
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65 | a8083063 | Iustin Pop | parts of our code. It signifies a real programming bug.
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66 | a8083063 | Iustin Pop |
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67 | a8083063 | Iustin Pop | """
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68 | a8083063 | Iustin Pop | pass
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69 | a8083063 | Iustin Pop | |
70 | a8083063 | Iustin Pop | |
71 | a8083063 | Iustin Pop | class BlockDeviceError(GenericError): |
72 | a8083063 | Iustin Pop | """Block-device related exception.
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73 | a8083063 | Iustin Pop |
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74 | a8083063 | Iustin Pop | This is raised in case we can't setup the instance's block devices
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75 | a8083063 | Iustin Pop | properly.
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76 | a8083063 | Iustin Pop |
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77 | a8083063 | Iustin Pop | """
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78 | a8083063 | Iustin Pop | pass
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79 | a8083063 | Iustin Pop | |
80 | a8083063 | Iustin Pop | |
81 | a8083063 | Iustin Pop | class ConfigurationError(GenericError): |
82 | a8083063 | Iustin Pop | """Configuration related exception.
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83 | a8083063 | Iustin Pop |
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84 | a8083063 | Iustin Pop | Things like having an instance with a primary node that doesn't
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85 | a8083063 | Iustin Pop | exist in the config or such raise this exception.
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86 | a8083063 | Iustin Pop |
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87 | a8083063 | Iustin Pop | """
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88 | a8083063 | Iustin Pop | pass
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89 | a8083063 | Iustin Pop | |
90 | a8083063 | Iustin Pop | |
91 | a8083063 | Iustin Pop | class RemoteError(GenericError): |
92 | a8083063 | Iustin Pop | """Programming-related error on remote call.
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93 | a8083063 | Iustin Pop |
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94 | a8083063 | Iustin Pop | This is raised when an unhandled error occurs in a call to a
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95 | a8083063 | Iustin Pop | remote node. It usually signifies a real programming bug.
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96 | a8083063 | Iustin Pop |
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97 | a8083063 | Iustin Pop | """
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98 | a8083063 | Iustin Pop | pass
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99 | a8083063 | Iustin Pop | |
100 | a8083063 | Iustin Pop | |
101 | a8083063 | Iustin Pop | class InvalidOS(GenericError): |
102 | a8083063 | Iustin Pop | """Missing OS on node.
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103 | a8083063 | Iustin Pop |
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104 | a8083063 | Iustin Pop | This is raised when an OS exists on the master (or is otherwise
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105 | a8083063 | Iustin Pop | requested to the code) but not on the target node.
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106 | a8083063 | Iustin Pop |
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107 | 305a7297 | Guido Trotter | This exception has three arguments:
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108 | a8083063 | Iustin Pop | - the name of the os
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109 | 305a7297 | Guido Trotter | - the source directory, if any
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110 | a8083063 | Iustin Pop | - the reason why we consider this an invalid OS (text of error message)
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111 | a8083063 | Iustin Pop |
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112 | a8083063 | Iustin Pop | """
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113 | a8083063 | Iustin Pop | |
114 | a8083063 | Iustin Pop | |
115 | a8083063 | Iustin Pop | class ParameterError(GenericError): |
116 | a8083063 | Iustin Pop | """A passed parameter to a command is invalid.
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117 | a8083063 | Iustin Pop |
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118 | a8083063 | Iustin Pop | This is raised when the parameter passed to a request function is
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119 | a8083063 | Iustin Pop | invalid. Correct code should have verified this before passing the
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120 | a8083063 | Iustin Pop | request structure.
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121 | a8083063 | Iustin Pop |
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122 | a8083063 | Iustin Pop | The argument to this exception should be the parameter name.
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123 | a8083063 | Iustin Pop |
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124 | a8083063 | Iustin Pop | """
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125 | a8083063 | Iustin Pop | pass
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126 | a8083063 | Iustin Pop | |
127 | a8083063 | Iustin Pop | |
128 | a8083063 | Iustin Pop | class OpPrereqError(GenericError): |
129 | a8083063 | Iustin Pop | """Prerequisites for the OpCode are not fulfilled.
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130 | a8083063 | Iustin Pop |
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131 | a8083063 | Iustin Pop | """
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132 | a8083063 | Iustin Pop | |
133 | 098c0958 | Michael Hanselmann | |
134 | a8083063 | Iustin Pop | class OpExecError(GenericError): |
135 | a8083063 | Iustin Pop | """Error during OpCode execution.
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136 | a8083063 | Iustin Pop |
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137 | a8083063 | Iustin Pop | """
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138 | a8083063 | Iustin Pop | |
139 | 098c0958 | Michael Hanselmann | |
140 | 5c947f38 | Iustin Pop | class OpRetryError(OpExecError): |
141 | 5c947f38 | Iustin Pop | """Error during OpCode execution, action can be retried.
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142 | 5c947f38 | Iustin Pop |
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143 | 5c947f38 | Iustin Pop | """
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144 | 5c947f38 | Iustin Pop | |
145 | 5c947f38 | Iustin Pop | |
146 | a8083063 | Iustin Pop | class OpCodeUnknown(GenericError): |
147 | a8083063 | Iustin Pop | """Unknown opcode submitted.
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148 | a8083063 | Iustin Pop |
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149 | a8083063 | Iustin Pop | This signifies a mismatch between the definitions on the client and
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150 | a8083063 | Iustin Pop | server side.
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151 | a8083063 | Iustin Pop |
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152 | a8083063 | Iustin Pop | """
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153 | a8083063 | Iustin Pop | |
154 | 098c0958 | Michael Hanselmann | |
155 | 685ee993 | Iustin Pop | class JobLost(GenericError): |
156 | 685ee993 | Iustin Pop | """Submitted job lost.
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157 | 685ee993 | Iustin Pop |
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158 | 685ee993 | Iustin Pop | The job was submitted but it cannot be found in the current job
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159 | 685ee993 | Iustin Pop | list.
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160 | 685ee993 | Iustin Pop |
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161 | 685ee993 | Iustin Pop | """
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162 | 685ee993 | Iustin Pop | |
163 | 685ee993 | Iustin Pop | |
164 | 89e1fc26 | Iustin Pop | class ResolverError(GenericError): |
165 | 89e1fc26 | Iustin Pop | """Host name cannot be resolved.
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166 | 89e1fc26 | Iustin Pop |
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167 | 89e1fc26 | Iustin Pop | This is not a normal situation for Ganeti, as we rely on having a
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168 | 89e1fc26 | Iustin Pop | working resolver.
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169 | 89e1fc26 | Iustin Pop |
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170 | 89e1fc26 | Iustin Pop | The non-resolvable hostname is available as the first element of the
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171 | 89e1fc26 | Iustin Pop | args tuple; the other two elements of the tuple are the first two
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172 | 89e1fc26 | Iustin Pop | args of the socket.gaierror exception (error code and description).
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173 | 89e1fc26 | Iustin Pop |
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174 | 89e1fc26 | Iustin Pop | """
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175 | 89e1fc26 | Iustin Pop | |
176 | 89e1fc26 | Iustin Pop | |
177 | a8083063 | Iustin Pop | class HooksFailure(GenericError): |
178 | a8083063 | Iustin Pop | """A generic hook failure.
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179 | a8083063 | Iustin Pop |
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180 | a8083063 | Iustin Pop | This signifies usually a setup misconfiguration.
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181 | a8083063 | Iustin Pop |
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182 | a8083063 | Iustin Pop | """
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183 | a8083063 | Iustin Pop | |
184 | 098c0958 | Michael Hanselmann | |
185 | a8083063 | Iustin Pop | class HooksAbort(HooksFailure): |
186 | a8083063 | Iustin Pop | """A required hook has failed.
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187 | a8083063 | Iustin Pop |
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188 | a8083063 | Iustin Pop | This caused an abort of the operation in the initial phase. This
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189 | a8083063 | Iustin Pop | exception always has an attribute args which is a list of tuples of:
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190 | a8083063 | Iustin Pop | - node: the source node on which this hooks has failed
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191 | a8083063 | Iustin Pop | - script: the name of the script which aborted the run
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192 | a8083063 | Iustin Pop |
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193 | a8083063 | Iustin Pop | """
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194 | a8083063 | Iustin Pop | |
195 | 098c0958 | Michael Hanselmann | |
196 | a8083063 | Iustin Pop | class UnitParseError(GenericError): |
197 | a8083063 | Iustin Pop | """Unable to parse size unit.
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198 | a8083063 | Iustin Pop |
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199 | a8083063 | Iustin Pop | """
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200 | a8083063 | Iustin Pop | |
201 | a8083063 | Iustin Pop | |
202 | a8083063 | Iustin Pop | class SshKeyError(GenericError): |
203 | a8083063 | Iustin Pop | """Invalid SSH key.
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204 | b0059682 | Guido Trotter |
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205 | a8083063 | Iustin Pop | """
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206 | 5c947f38 | Iustin Pop | |
207 | 5c947f38 | Iustin Pop | |
208 | 5c947f38 | Iustin Pop | class TagError(GenericError): |
209 | 5c947f38 | Iustin Pop | """Generic tag error.
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210 | 5c947f38 | Iustin Pop |
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211 | 5c947f38 | Iustin Pop | The argument to this exception will show the exact error.
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212 | 5c947f38 | Iustin Pop |
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213 | 5c947f38 | Iustin Pop | """
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214 | 7bca53e4 | Michael Hanselmann | |
215 | 7bca53e4 | Michael Hanselmann | |
216 | 7bca53e4 | Michael Hanselmann | class CommandError(GenericError): |
217 | 7bca53e4 | Michael Hanselmann | """External command error.
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218 | 7bca53e4 | Michael Hanselmann |
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219 | 7bca53e4 | Michael Hanselmann | """
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220 | e50bdd68 | Guido Trotter | |
221 | e50bdd68 | Guido Trotter | |
222 | e50bdd68 | Guido Trotter | class QuitGanetiException(Exception): |
223 | e50bdd68 | Guido Trotter | """Signal that Ganeti that it must quit.
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224 | e50bdd68 | Guido Trotter |
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225 | e50bdd68 | Guido Trotter | This is not necessarily an error (and thus not a subclass of GenericError),
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226 | e50bdd68 | Guido Trotter | but it's an exceptional circumstance and it is thus treated. This instance
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227 | 9f9c8ee2 | Guido Trotter | should be instantiated with two values. The first one will specify whether an
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228 | 9f9c8ee2 | Guido Trotter | error should returned to the caller, and the second one will be the returned
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229 | 9f9c8ee2 | Guido Trotter | result (either as an error or as a normal result).
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230 | e50bdd68 | Guido Trotter |
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231 | e50bdd68 | Guido Trotter | Examples:
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232 | e50bdd68 | Guido Trotter | # Return a result of "True" to the caller, but quit ganeti afterwards
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233 | 9f9c8ee2 | Guido Trotter | raise QuitGanetiException(False, True)
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234 | e50bdd68 | Guido Trotter | # Send an error to the caller, and quit ganeti
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235 | 9f9c8ee2 | Guido Trotter | raise QuitGanetiException(True, "Fatal safety violation, shutting down")
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236 | e50bdd68 | Guido Trotter |
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237 | e50bdd68 | Guido Trotter | """
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238 | e50bdd68 | Guido Trotter | |
239 | f1da30e6 | Michael Hanselmann | |
240 | d11bda8d | Iustin Pop | class JobQueueError(GenericError): |
241 | f1da30e6 | Michael Hanselmann | """Job queue error.
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242 | f1da30e6 | Michael Hanselmann |
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243 | f1da30e6 | Michael Hanselmann | """
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244 | 6797ec29 | Iustin Pop | |
245 | 6797ec29 | Iustin Pop | |
246 | 686d7433 | Iustin Pop | class JobQueueDrainError(JobQueueError): |
247 | 686d7433 | Iustin Pop | """Job queue is marked for drain error.
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248 | 686d7433 | Iustin Pop |
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249 | 686d7433 | Iustin Pop | This is raised when a job submission attempt is made but the queue
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250 | 686d7433 | Iustin Pop | is marked for drain.
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251 | 686d7433 | Iustin Pop |
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252 | 686d7433 | Iustin Pop | """
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253 | 686d7433 | Iustin Pop | |
254 | 686d7433 | Iustin Pop | |
255 | 6797ec29 | Iustin Pop | # errors should be added above
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256 | 6797ec29 | Iustin Pop | |
257 | 6797ec29 | Iustin Pop | |
258 | 6797ec29 | Iustin Pop | def GetErrorClass(name): |
259 | 6797ec29 | Iustin Pop | """Return the class of an exception.
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260 | 6797ec29 | Iustin Pop |
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261 | 6797ec29 | Iustin Pop | Given the class name, return the class itself.
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262 | 6797ec29 | Iustin Pop |
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263 | 6797ec29 | Iustin Pop | @type name: str
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264 | 6797ec29 | Iustin Pop | @param name: the exception name
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265 | 6797ec29 | Iustin Pop | @rtype: class
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266 | 6797ec29 | Iustin Pop | @return: the actual class, or None if not found
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267 | 6797ec29 | Iustin Pop |
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268 | 6797ec29 | Iustin Pop | """
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269 | 6797ec29 | Iustin Pop | item = globals().get(name, None) |
270 | 6797ec29 | Iustin Pop | if item is not None: |
271 | 6797ec29 | Iustin Pop | if not (isinstance(item, type(Exception)) and |
272 | 6797ec29 | Iustin Pop | issubclass(item, GenericError)):
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273 | 6797ec29 | Iustin Pop | item = None
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274 | 6797ec29 | Iustin Pop | return item |