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2 | a8083063 | Iustin Pop | #
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3 | a8083063 | Iustin Pop | |
4 | 4b63dc7a | Iustin Pop | # Copyright (C) 2006, 2007, 2008, 2009, 2010 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 | 5c983ee5 | Iustin Pop | # OpPrereqError failure types
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26 | 5c983ee5 | Iustin Pop | |
27 | 104f4ca1 | Iustin Pop | # resolver errors
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28 | 104f4ca1 | Iustin Pop | ECODE_RESOLVER = "resolver_error"
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29 | 5c983ee5 | Iustin Pop | # not enough resources (iallocator failure, disk space, memory, etc.)
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30 | 5c983ee5 | Iustin Pop | ECODE_NORES = "insufficient_resources"
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31 | 5c983ee5 | Iustin Pop | # wrong arguments (at syntax level)
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32 | 5c983ee5 | Iustin Pop | ECODE_INVAL = "wrong_input"
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33 | 5c983ee5 | Iustin Pop | # wrong entity state
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34 | 5c983ee5 | Iustin Pop | ECODE_STATE = "wrong_state"
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35 | 5c983ee5 | Iustin Pop | # entity not found
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36 | 5c983ee5 | Iustin Pop | ECODE_NOENT = "unknown_entity"
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37 | 5c983ee5 | Iustin Pop | # entity already exists
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38 | 5c983ee5 | Iustin Pop | ECODE_EXISTS = "already_exists"
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39 | 5c983ee5 | Iustin Pop | # resource not unique (e.g. MAC or IP duplication)
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40 | 5c983ee5 | Iustin Pop | ECODE_NOTUNIQUE = "resource_not_unique"
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41 | 5c983ee5 | Iustin Pop | # internal cluster error
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42 | 5c983ee5 | Iustin Pop | ECODE_FAULT = "internal_error"
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43 | 5c983ee5 | Iustin Pop | # environment error (e.g. node disk error)
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44 | 5c983ee5 | Iustin Pop | ECODE_ENVIRON = "environment_error"
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45 | 5c983ee5 | Iustin Pop | |
46 | 5c983ee5 | Iustin Pop | |
47 | a8083063 | Iustin Pop | class GenericError(Exception): |
48 | a8083063 | Iustin Pop | """Base exception for Ganeti.
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49 | a8083063 | Iustin Pop |
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50 | a8083063 | Iustin Pop | """
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51 | a8083063 | Iustin Pop | pass
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52 | a8083063 | Iustin Pop | |
53 | a8083063 | Iustin Pop | |
54 | a8083063 | Iustin Pop | class LVMError(GenericError): |
55 | a8083063 | Iustin Pop | """LVM-related exception.
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56 | a8083063 | Iustin Pop |
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57 | a8083063 | Iustin Pop | This exception codifies problems with LVM setup.
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58 | a8083063 | Iustin Pop |
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59 | a8083063 | Iustin Pop | """
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60 | a8083063 | Iustin Pop | pass
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61 | a8083063 | Iustin Pop | |
62 | a8083063 | Iustin Pop | |
63 | a8083063 | Iustin Pop | class LockError(GenericError): |
64 | a8083063 | Iustin Pop | """Lock error exception.
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65 | a8083063 | Iustin Pop |
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66 | a8083063 | Iustin Pop | This signifies problems in the locking subsystem.
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67 | a8083063 | Iustin Pop |
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68 | a8083063 | Iustin Pop | """
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69 | a8083063 | Iustin Pop | pass
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70 | a8083063 | Iustin Pop | |
71 | a8083063 | Iustin Pop | |
72 | a8083063 | Iustin Pop | class HypervisorError(GenericError): |
73 | a8083063 | Iustin Pop | """Hypervisor-related exception.
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74 | a8083063 | Iustin Pop |
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75 | a8083063 | Iustin Pop | This is raised in case we can't communicate with the hypervisor
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76 | a8083063 | Iustin Pop | properly.
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77 | a8083063 | Iustin Pop |
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78 | a8083063 | Iustin Pop | """
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79 | a8083063 | Iustin Pop | pass
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80 | a8083063 | Iustin Pop | |
81 | a8083063 | Iustin Pop | |
82 | a8083063 | Iustin Pop | class ProgrammerError(GenericError): |
83 | a8083063 | Iustin Pop | """Programming-related error.
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84 | a8083063 | Iustin Pop |
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85 | a8083063 | Iustin Pop | This is raised in cases we determine that the calling conventions
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86 | a8083063 | Iustin Pop | have been violated, meaning we got some desynchronisation between
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87 | a8083063 | Iustin Pop | parts of our code. It signifies a real programming bug.
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88 | a8083063 | Iustin Pop |
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89 | a8083063 | Iustin Pop | """
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90 | a8083063 | Iustin Pop | pass
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91 | a8083063 | Iustin Pop | |
92 | a8083063 | Iustin Pop | |
93 | a8083063 | Iustin Pop | class BlockDeviceError(GenericError): |
94 | a8083063 | Iustin Pop | """Block-device related exception.
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95 | a8083063 | Iustin Pop |
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96 | a8083063 | Iustin Pop | This is raised in case we can't setup the instance's block devices
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97 | a8083063 | Iustin Pop | properly.
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98 | a8083063 | Iustin Pop |
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99 | a8083063 | Iustin Pop | """
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100 | a8083063 | Iustin Pop | pass
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101 | a8083063 | Iustin Pop | |
102 | a8083063 | Iustin Pop | |
103 | a8083063 | Iustin Pop | class ConfigurationError(GenericError): |
104 | a8083063 | Iustin Pop | """Configuration related exception.
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105 | a8083063 | Iustin Pop |
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106 | a8083063 | Iustin Pop | Things like having an instance with a primary node that doesn't
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107 | a8083063 | Iustin Pop | exist in the config or such raise this exception.
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108 | a8083063 | Iustin Pop |
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109 | a8083063 | Iustin Pop | """
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110 | a8083063 | Iustin Pop | pass
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111 | a8083063 | Iustin Pop | |
112 | a8083063 | Iustin Pop | |
113 | 4b63dc7a | Iustin Pop | class ConfigVersionMismatch(ConfigurationError): |
114 | 4b63dc7a | Iustin Pop | """Version mismatch in the configuration file.
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115 | 4b63dc7a | Iustin Pop |
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116 | 4b63dc7a | Iustin Pop | The error has two arguments: the expected and the actual found
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117 | 4b63dc7a | Iustin Pop | version.
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118 | 4b63dc7a | Iustin Pop |
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119 | 4b63dc7a | Iustin Pop | """
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120 | 4b63dc7a | Iustin Pop | pass
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121 | 4b63dc7a | Iustin Pop | |
122 | 4b63dc7a | Iustin Pop | |
123 | 2c8a5690 | Guido Trotter | class ReservationError(GenericError): |
124 | 2c8a5690 | Guido Trotter | """Errors reserving a resource.
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125 | 2c8a5690 | Guido Trotter |
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126 | 2c8a5690 | Guido Trotter | """
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127 | 2c8a5690 | Guido Trotter | |
128 | 2c8a5690 | Guido Trotter | |
129 | a8083063 | Iustin Pop | class RemoteError(GenericError): |
130 | a8083063 | Iustin Pop | """Programming-related error on remote call.
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131 | a8083063 | Iustin Pop |
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132 | a8083063 | Iustin Pop | This is raised when an unhandled error occurs in a call to a
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133 | a8083063 | Iustin Pop | remote node. It usually signifies a real programming bug.
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134 | a8083063 | Iustin Pop |
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135 | a8083063 | Iustin Pop | """
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136 | a8083063 | Iustin Pop | pass
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137 | a8083063 | Iustin Pop | |
138 | a8083063 | Iustin Pop | |
139 | f4a2f532 | Guido Trotter | class SignatureError(GenericError): |
140 | f4a2f532 | Guido Trotter | """Error authenticating a remote message.
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141 | f4a2f532 | Guido Trotter |
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142 | f4a2f532 | Guido Trotter | This is raised when the hmac signature on a message doesn't verify correctly
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143 | f4a2f532 | Guido Trotter | to the message itself. It can happen because of network unreliability or
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144 | f4a2f532 | Guido Trotter | because of spurious traffic.
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145 | f4a2f532 | Guido Trotter |
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146 | f4a2f532 | Guido Trotter | """
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147 | f4a2f532 | Guido Trotter | pass
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148 | f4a2f532 | Guido Trotter | |
149 | f4a2f532 | Guido Trotter | |
150 | a8083063 | Iustin Pop | class ParameterError(GenericError): |
151 | a8083063 | Iustin Pop | """A passed parameter to a command is invalid.
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152 | a8083063 | Iustin Pop |
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153 | a8083063 | Iustin Pop | This is raised when the parameter passed to a request function is
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154 | a8083063 | Iustin Pop | invalid. Correct code should have verified this before passing the
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155 | a8083063 | Iustin Pop | request structure.
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156 | a8083063 | Iustin Pop |
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157 | a8083063 | Iustin Pop | The argument to this exception should be the parameter name.
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158 | a8083063 | Iustin Pop |
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159 | a8083063 | Iustin Pop | """
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160 | a8083063 | Iustin Pop | pass
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161 | a8083063 | Iustin Pop | |
162 | a8083063 | Iustin Pop | |
163 | a8083063 | Iustin Pop | class OpPrereqError(GenericError): |
164 | a8083063 | Iustin Pop | """Prerequisites for the OpCode are not fulfilled.
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165 | a8083063 | Iustin Pop |
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166 | 5c983ee5 | Iustin Pop | This exception will have either one or two arguments. For the
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167 | 5c983ee5 | Iustin Pop | two-argument construction, the second argument should be one of the
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168 | 5c983ee5 | Iustin Pop | ECODE_* codes.
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169 | 5c983ee5 | Iustin Pop |
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170 | a8083063 | Iustin Pop | """
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171 | a8083063 | Iustin Pop | |
172 | 098c0958 | Michael Hanselmann | |
173 | a8083063 | Iustin Pop | class OpExecError(GenericError): |
174 | a8083063 | Iustin Pop | """Error during OpCode execution.
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175 | a8083063 | Iustin Pop |
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176 | a8083063 | Iustin Pop | """
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177 | a8083063 | Iustin Pop | |
178 | 098c0958 | Michael Hanselmann | |
179 | a8083063 | Iustin Pop | class OpCodeUnknown(GenericError): |
180 | a8083063 | Iustin Pop | """Unknown opcode submitted.
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181 | a8083063 | Iustin Pop |
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182 | a8083063 | Iustin Pop | This signifies a mismatch between the definitions on the client and
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183 | a8083063 | Iustin Pop | server side.
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184 | a8083063 | Iustin Pop |
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185 | a8083063 | Iustin Pop | """
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186 | a8083063 | Iustin Pop | |
187 | 098c0958 | Michael Hanselmann | |
188 | 685ee993 | Iustin Pop | class JobLost(GenericError): |
189 | 685ee993 | Iustin Pop | """Submitted job lost.
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190 | 685ee993 | Iustin Pop |
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191 | 685ee993 | Iustin Pop | The job was submitted but it cannot be found in the current job
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192 | 685ee993 | Iustin Pop | list.
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193 | 685ee993 | Iustin Pop |
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194 | 685ee993 | Iustin Pop | """
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195 | 685ee993 | Iustin Pop | |
196 | 685ee993 | Iustin Pop | |
197 | 3d6c5566 | Guido Trotter | class JobFileCorrupted(GenericError): |
198 | 3d6c5566 | Guido Trotter | """Job file could not be properly decoded/restored.
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199 | 3d6c5566 | Guido Trotter |
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200 | 3d6c5566 | Guido Trotter | """
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201 | 3d6c5566 | Guido Trotter | |
202 | 3d6c5566 | Guido Trotter | |
203 | 89e1fc26 | Iustin Pop | class ResolverError(GenericError): |
204 | 89e1fc26 | Iustin Pop | """Host name cannot be resolved.
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205 | 89e1fc26 | Iustin Pop |
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206 | 89e1fc26 | Iustin Pop | This is not a normal situation for Ganeti, as we rely on having a
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207 | 89e1fc26 | Iustin Pop | working resolver.
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208 | 89e1fc26 | Iustin Pop |
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209 | 89e1fc26 | Iustin Pop | The non-resolvable hostname is available as the first element of the
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210 | 89e1fc26 | Iustin Pop | args tuple; the other two elements of the tuple are the first two
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211 | 89e1fc26 | Iustin Pop | args of the socket.gaierror exception (error code and description).
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212 | 89e1fc26 | Iustin Pop |
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213 | 89e1fc26 | Iustin Pop | """
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214 | 89e1fc26 | Iustin Pop | |
215 | 89e1fc26 | Iustin Pop | |
216 | a8083063 | Iustin Pop | class HooksFailure(GenericError): |
217 | a8083063 | Iustin Pop | """A generic hook failure.
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218 | a8083063 | Iustin Pop |
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219 | a8083063 | Iustin Pop | This signifies usually a setup misconfiguration.
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220 | a8083063 | Iustin Pop |
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221 | a8083063 | Iustin Pop | """
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222 | a8083063 | Iustin Pop | |
223 | 098c0958 | Michael Hanselmann | |
224 | a8083063 | Iustin Pop | class HooksAbort(HooksFailure): |
225 | a8083063 | Iustin Pop | """A required hook has failed.
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226 | a8083063 | Iustin Pop |
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227 | a8083063 | Iustin Pop | This caused an abort of the operation in the initial phase. This
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228 | a8083063 | Iustin Pop | exception always has an attribute args which is a list of tuples of:
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229 | a8083063 | Iustin Pop | - node: the source node on which this hooks has failed
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230 | a8083063 | Iustin Pop | - script: the name of the script which aborted the run
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231 | a8083063 | Iustin Pop |
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232 | a8083063 | Iustin Pop | """
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233 | a8083063 | Iustin Pop | |
234 | 098c0958 | Michael Hanselmann | |
235 | a8083063 | Iustin Pop | class UnitParseError(GenericError): |
236 | a8083063 | Iustin Pop | """Unable to parse size unit.
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237 | a8083063 | Iustin Pop |
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238 | a8083063 | Iustin Pop | """
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239 | a8083063 | Iustin Pop | |
240 | ac2d0fe4 | Michael Hanselmann | |
241 | 31155d60 | Balazs Lecz | class ParseError(GenericError): |
242 | 31155d60 | Balazs Lecz | """Generic parse error.
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243 | 31155d60 | Balazs Lecz |
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244 | 31155d60 | Balazs Lecz | Raised when unable to parse user input.
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245 | 31155d60 | Balazs Lecz |
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246 | 31155d60 | Balazs Lecz | """
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247 | 31155d60 | Balazs Lecz | |
248 | 31155d60 | Balazs Lecz | |
249 | a5728081 | Guido Trotter | class TypeEnforcementError(GenericError): |
250 | a5728081 | Guido Trotter | """Unable to enforce data type.
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251 | a5728081 | Guido Trotter |
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252 | a5728081 | Guido Trotter | """
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253 | a8083063 | Iustin Pop | |
254 | ac2d0fe4 | Michael Hanselmann | |
255 | a8083063 | Iustin Pop | class SshKeyError(GenericError): |
256 | a8083063 | Iustin Pop | """Invalid SSH key.
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257 | b0059682 | Guido Trotter |
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258 | a8083063 | Iustin Pop | """
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259 | 5c947f38 | Iustin Pop | |
260 | 5c947f38 | Iustin Pop | |
261 | 5c947f38 | Iustin Pop | class TagError(GenericError): |
262 | 5c947f38 | Iustin Pop | """Generic tag error.
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263 | 5c947f38 | Iustin Pop |
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264 | 5c947f38 | Iustin Pop | The argument to this exception will show the exact error.
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265 | 5c947f38 | Iustin Pop |
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266 | 5c947f38 | Iustin Pop | """
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267 | 7bca53e4 | Michael Hanselmann | |
268 | 7bca53e4 | Michael Hanselmann | |
269 | 7bca53e4 | Michael Hanselmann | class CommandError(GenericError): |
270 | 7bca53e4 | Michael Hanselmann | """External command error.
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271 | 7bca53e4 | Michael Hanselmann |
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272 | 7bca53e4 | Michael Hanselmann | """
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273 | e50bdd68 | Guido Trotter | |
274 | e50bdd68 | Guido Trotter | |
275 | ac2d0fe4 | Michael Hanselmann | class StorageError(GenericError): |
276 | ac2d0fe4 | Michael Hanselmann | """Storage-related exception.
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277 | ac2d0fe4 | Michael Hanselmann |
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278 | ac2d0fe4 | Michael Hanselmann | """
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279 | ac2d0fe4 | Michael Hanselmann | |
280 | 589dee9a | Guido Trotter | |
281 | 589dee9a | Guido Trotter | class InotifyError(GenericError): |
282 | 589dee9a | Guido Trotter | """Error raised when there is a failure setting up an inotify watcher.
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283 | 589dee9a | Guido Trotter |
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284 | 589dee9a | Guido Trotter | """
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285 | 589dee9a | Guido Trotter | |
286 | ac2d0fe4 | Michael Hanselmann | |
287 | e50bdd68 | Guido Trotter | class QuitGanetiException(Exception): |
288 | e50bdd68 | Guido Trotter | """Signal that Ganeti that it must quit.
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289 | e50bdd68 | Guido Trotter |
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290 | 0623d351 | Iustin Pop | This is not necessarily an error (and thus not a subclass of
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291 | 0623d351 | Iustin Pop | GenericError), but it's an exceptional circumstance and it is thus
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292 | 0623d351 | Iustin Pop | treated. This instance should be instantiated with two values. The
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293 | 0623d351 | Iustin Pop | first one will specify the return code to the caller, and the second
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294 | 0623d351 | Iustin Pop | one will be the returned result (either as an error or as a normal
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295 | 0623d351 | Iustin Pop | result). Usually only the leave cluster rpc call should return
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296 | 0623d351 | Iustin Pop | status True (as there it's expected we quit), every other call will
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297 | 0623d351 | Iustin Pop | return status False (as a critical error was encountered).
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298 | e50bdd68 | Guido Trotter |
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299 | c41eea6e | Iustin Pop | Examples::
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300 | c41eea6e | Iustin Pop |
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301 | e50bdd68 | Guido Trotter | # Return a result of "True" to the caller, but quit ganeti afterwards
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302 | 0623d351 | Iustin Pop | raise QuitGanetiException(True, None)
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303 | e50bdd68 | Guido Trotter | # Send an error to the caller, and quit ganeti
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304 | 0623d351 | Iustin Pop | raise QuitGanetiException(False, "Fatal safety violation, shutting down")
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305 | e50bdd68 | Guido Trotter |
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306 | e50bdd68 | Guido Trotter | """
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307 | e50bdd68 | Guido Trotter | |
308 | f1da30e6 | Michael Hanselmann | |
309 | d11bda8d | Iustin Pop | class JobQueueError(GenericError): |
310 | f1da30e6 | Michael Hanselmann | """Job queue error.
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311 | f1da30e6 | Michael Hanselmann |
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312 | f1da30e6 | Michael Hanselmann | """
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313 | 6797ec29 | Iustin Pop | |
314 | 6797ec29 | Iustin Pop | |
315 | 686d7433 | Iustin Pop | class JobQueueDrainError(JobQueueError): |
316 | 686d7433 | Iustin Pop | """Job queue is marked for drain error.
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317 | 686d7433 | Iustin Pop |
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318 | 686d7433 | Iustin Pop | This is raised when a job submission attempt is made but the queue
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319 | 686d7433 | Iustin Pop | is marked for drain.
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320 | 686d7433 | Iustin Pop |
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321 | 686d7433 | Iustin Pop | """
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322 | 686d7433 | Iustin Pop | |
323 | 686d7433 | Iustin Pop | |
324 | f87b405e | Michael Hanselmann | class JobQueueFull(JobQueueError): |
325 | f87b405e | Michael Hanselmann | """Job queue full error.
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326 | f87b405e | Michael Hanselmann |
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327 | f87b405e | Michael Hanselmann | Raised when job queue size reached its hard limit.
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328 | f87b405e | Michael Hanselmann |
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329 | f87b405e | Michael Hanselmann | """
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330 | f87b405e | Michael Hanselmann | |
331 | f87b405e | Michael Hanselmann | |
332 | b125e3b3 | Guido Trotter | class ConfdRequestError(GenericError): |
333 | b125e3b3 | Guido Trotter | """A request error in Ganeti confd.
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334 | b125e3b3 | Guido Trotter |
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335 | b125e3b3 | Guido Trotter | Events that should make confd abort the current request and proceed serving
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336 | b125e3b3 | Guido Trotter | different ones.
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337 | b125e3b3 | Guido Trotter |
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338 | b125e3b3 | Guido Trotter | """
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339 | b125e3b3 | Guido Trotter | |
340 | b125e3b3 | Guido Trotter | |
341 | 9748ab35 | Guido Trotter | class ConfdMagicError(GenericError): |
342 | 9748ab35 | Guido Trotter | """A magic fourcc error in Ganeti confd.
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343 | 9748ab35 | Guido Trotter |
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344 | 9748ab35 | Guido Trotter | Errors processing the fourcc in ganeti confd datagrams.
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345 | 9748ab35 | Guido Trotter |
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346 | 9748ab35 | Guido Trotter | """
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347 | 9748ab35 | Guido Trotter | |
348 | 9748ab35 | Guido Trotter | |
349 | e4ccf6cd | Guido Trotter | class ConfdClientError(GenericError): |
350 | e4ccf6cd | Guido Trotter | """A magic fourcc error in Ganeti confd.
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351 | e4ccf6cd | Guido Trotter |
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352 | e4ccf6cd | Guido Trotter | Errors in the confd client library.
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353 | e4ccf6cd | Guido Trotter |
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354 | e4ccf6cd | Guido Trotter | """
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355 | e4ccf6cd | Guido Trotter | |
356 | e4ccf6cd | Guido Trotter | |
357 | c8eded0b | Guido Trotter | class UdpDataSizeError(GenericError): |
358 | c8eded0b | Guido Trotter | """UDP payload too big.
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359 | c8eded0b | Guido Trotter |
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360 | c8eded0b | Guido Trotter | """
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361 | c8eded0b | Guido Trotter | |
362 | c8eded0b | Guido Trotter | |
363 | 4c32a8bd | Luca Bigliardi | class NoCtypesError(GenericError): |
364 | 4c32a8bd | Luca Bigliardi | """python ctypes module is not found in the system.
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365 | 4c32a8bd | Luca Bigliardi |
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366 | 4c32a8bd | Luca Bigliardi | """
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367 | 4c32a8bd | Luca Bigliardi | |
368 | 4c32a8bd | Luca Bigliardi | |
369 | 8b312c1d | Manuel Franceschini | class IPAddressError(GenericError): |
370 | 8b312c1d | Manuel Franceschini | """Generic IP address error.
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371 | 8b312c1d | Manuel Franceschini |
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372 | 8b312c1d | Manuel Franceschini | """
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373 | 8b312c1d | Manuel Franceschini | |
374 | 8b312c1d | Manuel Franceschini | |
375 | 7a8bda3f | Michael Hanselmann | class LuxiError(GenericError): |
376 | 7a8bda3f | Michael Hanselmann | """LUXI error.
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377 | 7a8bda3f | Michael Hanselmann |
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378 | 7a8bda3f | Michael Hanselmann | """
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379 | 7a8bda3f | Michael Hanselmann | |
380 | 7a8bda3f | Michael Hanselmann | |
381 | 6797ec29 | Iustin Pop | # errors should be added above
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382 | 6797ec29 | Iustin Pop | |
383 | 6797ec29 | Iustin Pop | |
384 | 6797ec29 | Iustin Pop | def GetErrorClass(name): |
385 | 6797ec29 | Iustin Pop | """Return the class of an exception.
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386 | 6797ec29 | Iustin Pop |
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387 | 6797ec29 | Iustin Pop | Given the class name, return the class itself.
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388 | 6797ec29 | Iustin Pop |
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389 | 6797ec29 | Iustin Pop | @type name: str
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390 | 6797ec29 | Iustin Pop | @param name: the exception name
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391 | 6797ec29 | Iustin Pop | @rtype: class
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392 | 6797ec29 | Iustin Pop | @return: the actual class, or None if not found
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393 | 6797ec29 | Iustin Pop |
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394 | 6797ec29 | Iustin Pop | """
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395 | 6797ec29 | Iustin Pop | item = globals().get(name, None) |
396 | 6797ec29 | Iustin Pop | if item is not None: |
397 | 6797ec29 | Iustin Pop | if not (isinstance(item, type(Exception)) and |
398 | 6797ec29 | Iustin Pop | issubclass(item, GenericError)):
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399 | 6797ec29 | Iustin Pop | item = None
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400 | 6797ec29 | Iustin Pop | return item
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401 | 6956e9cd | Iustin Pop | |
402 | 6956e9cd | Iustin Pop | |
403 | 6956e9cd | Iustin Pop | def EncodeException(err): |
404 | 6956e9cd | Iustin Pop | """Encodes an exception into a format that L{MaybeRaise} will recognise.
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405 | 6956e9cd | Iustin Pop |
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406 | 6956e9cd | Iustin Pop | The passed L{err} argument will be formatted as a tuple (exception
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407 | 6956e9cd | Iustin Pop | name, arguments) that the MaybeRaise function will recognise.
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408 | 6956e9cd | Iustin Pop |
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409 | 6956e9cd | Iustin Pop | @type err: GenericError child
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410 | 6956e9cd | Iustin Pop | @param err: usually a child of GenericError (but any exception
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411 | 6956e9cd | Iustin Pop | will be accepted)
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412 | 6956e9cd | Iustin Pop | @rtype: tuple
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413 | 6956e9cd | Iustin Pop | @return: tuple of (exception name, exception arguments)
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414 | 6956e9cd | Iustin Pop |
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415 | 6956e9cd | Iustin Pop | """
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416 | 6956e9cd | Iustin Pop | return (err.__class__.__name__, err.args)
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417 | 6956e9cd | Iustin Pop | |
418 | 6956e9cd | Iustin Pop | |
419 | 84f790e6 | Michael Hanselmann | def GetEncodedError(result): |
420 | 84f790e6 | Michael Hanselmann | """If this looks like an encoded Ganeti exception, return it.
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421 | 6956e9cd | Iustin Pop |
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422 | 6956e9cd | Iustin Pop | This function tries to parse the passed argument and if it looks
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423 | 84f790e6 | Michael Hanselmann | like an encoding done by EncodeException, it will return the class
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424 | 84f790e6 | Michael Hanselmann | object and arguments.
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425 | 6956e9cd | Iustin Pop |
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426 | 6956e9cd | Iustin Pop | """
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427 | 6956e9cd | Iustin Pop | tlt = (tuple, list) |
428 | 6956e9cd | Iustin Pop | if (isinstance(result, tlt) and len(result) == 2 and |
429 | 6956e9cd | Iustin Pop | isinstance(result[1], tlt)): |
430 | 6956e9cd | Iustin Pop | # custom ganeti errors
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431 | 84f790e6 | Michael Hanselmann | errcls = GetErrorClass(result[0])
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432 | 84f790e6 | Michael Hanselmann | if errcls:
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433 | 84f790e6 | Michael Hanselmann | return (errcls, tuple(result[1])) |
434 | 84f790e6 | Michael Hanselmann | |
435 | 84f790e6 | Michael Hanselmann | return None |
436 | 84f790e6 | Michael Hanselmann | |
437 | 84f790e6 | Michael Hanselmann | |
438 | 84f790e6 | Michael Hanselmann | def MaybeRaise(result): |
439 | 84f790e6 | Michael Hanselmann | """If this looks like an encoded Ganeti exception, raise it.
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440 | 84f790e6 | Michael Hanselmann |
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441 | 84f790e6 | Michael Hanselmann | This function tries to parse the passed argument and if it looks
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442 | 84f790e6 | Michael Hanselmann | like an encoding done by EncodeException, it will re-raise it.
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443 | 84f790e6 | Michael Hanselmann |
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444 | 84f790e6 | Michael Hanselmann | """
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445 | 84f790e6 | Michael Hanselmann | error = GetEncodedError(result) |
446 | 84f790e6 | Michael Hanselmann | if error:
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447 | 84f790e6 | Michael Hanselmann | (errcls, args) = error |
448 | 84f790e6 | Michael Hanselmann | raise errcls, args |