4 # Copyright (C) 2006, 2007 Google Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful, but
12 # WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 # General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 """Ganeti exception handling"""
25 class GenericError(Exception):
26 """Base exception for Ganeti.
32 class LVMError(GenericError):
33 """LVM-related exception.
35 This exception codifies problems with LVM setup.
41 class LockError(GenericError):
42 """Lock error exception.
44 This signifies problems in the locking subsystem.
50 class HypervisorError(GenericError):
51 """Hypervisor-related exception.
53 This is raised in case we can't communicate with the hypervisor
60 class ProgrammerError(GenericError):
61 """Programming-related error.
63 This is raised in cases we determine that the calling conventions
64 have been violated, meaning we got some desynchronisation between
65 parts of our code. It signifies a real programming bug.
71 class BlockDeviceError(GenericError):
72 """Block-device related exception.
74 This is raised in case we can't setup the instance's block devices
81 class ConfigurationError(GenericError):
82 """Configuration related exception.
84 Things like having an instance with a primary node that doesn't
85 exist in the config or such raise this exception.
91 class RemoteError(GenericError):
92 """Programming-related error on remote call.
94 This is raised when an unhandled error occurs in a call to a
95 remote node. It usually signifies a real programming bug.
101 class InvalidOS(GenericError):
102 """Missing OS on node.
104 This is raised when an OS exists on the master (or is otherwise
105 requested to the code) but not on the target node.
107 This exception has two arguments:
109 - the reason why we consider this an invalid OS (text of error message)
114 class ParameterError(GenericError):
115 """A passed parameter to a command is invalid.
117 This is raised when the parameter passed to a request function is
118 invalid. Correct code should have verified this before passing the
121 The argument to this exception should be the parameter name.
127 class OpPrereqError(GenericError):
128 """Prerequisites for the OpCode are not fulfilled.
133 class OpExecError(GenericError):
134 """Error during OpCode execution.
139 class OpRetryError(OpExecError):
140 """Error during OpCode execution, action can be retried.
145 class OpCodeUnknown(GenericError):
146 """Unknown opcode submitted.
148 This signifies a mismatch between the definitions on the client and
154 class HooksFailure(GenericError):
155 """A generic hook failure.
157 This signifies usually a setup misconfiguration.
162 class HooksAbort(HooksFailure):
163 """A required hook has failed.
165 This caused an abort of the operation in the initial phase. This
166 exception always has an attribute args which is a list of tuples of:
167 - node: the source node on which this hooks has failed
168 - script: the name of the script which aborted the run
173 class UnitParseError(GenericError):
174 """Unable to parse size unit.
179 class SshKeyError(GenericError):
184 class TagError(GenericError):
185 """Generic tag error.
187 The argument to this exception will show the exact error.