X-Git-Url: https://code.grnet.gr/git/ganeti-local/blobdiff_plain/1e57442aef835816e190104d3e0a94f1b5d662c1..300e545069334c1e952c445700e60c51299976cc:/lib/errors.py diff --git a/lib/errors.py b/lib/errors.py index 2040cae..035df49 100644 --- a/lib/errors.py +++ b/lib/errors.py @@ -1,7 +1,7 @@ # # -# Copyright (C) 2006, 2007 Google Inc. +# Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Google Inc. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -22,29 +22,59 @@ """Ganeti exception handling""" +# OpPrereqError failure types + +# resolver errors +ECODE_RESOLVER = "resolver_error" +# not enough resources (iallocator failure, disk space, memory, etc.) +ECODE_NORES = "insufficient_resources" +# wrong arguments (at syntax level) +ECODE_INVAL = "wrong_input" +# wrong entity state +ECODE_STATE = "wrong_state" +# entity not found +ECODE_NOENT = "unknown_entity" +# entity already exists +ECODE_EXISTS = "already_exists" +# resource not unique (e.g. MAC or IP duplication) +ECODE_NOTUNIQUE = "resource_not_unique" +# internal cluster error +ECODE_FAULT = "internal_error" +# environment error (e.g. node disk error) +ECODE_ENVIRON = "environment_error" + +#: List of all failure types +ECODE_ALL = frozenset([ + ECODE_RESOLVER, + ECODE_NORES, + ECODE_INVAL, + ECODE_STATE, + ECODE_NOENT, + ECODE_EXISTS, + ECODE_NOTUNIQUE, + ECODE_FAULT, + ECODE_ENVIRON, + ]) + + class GenericError(Exception): """Base exception for Ganeti. """ - pass -class LVMError(GenericError): - """LVM-related exception. +class LockError(GenericError): + """Lock error exception. - This exception codifies problems with LVM setup. + This signifies problems in the locking subsystem. """ - pass -class LockError(GenericError): - """Lock error exception. - - This signifies problems in the locking subsystem. +class PidFileLockError(LockError): + """PID file is already locked by another process. """ - pass class HypervisorError(GenericError): @@ -54,7 +84,6 @@ class HypervisorError(GenericError): properly. """ - pass class ProgrammerError(GenericError): @@ -65,7 +94,6 @@ class ProgrammerError(GenericError): parts of our code. It signifies a real programming bug. """ - pass class BlockDeviceError(GenericError): @@ -75,7 +103,6 @@ class BlockDeviceError(GenericError): properly. """ - pass class ConfigurationError(GenericError): @@ -85,7 +112,21 @@ class ConfigurationError(GenericError): exist in the config or such raise this exception. """ - pass + + +class ConfigVersionMismatch(ConfigurationError): + """Version mismatch in the configuration file. + + The error has two arguments: the expected and the actual found + version. + + """ + + +class ReservationError(GenericError): + """Errors reserving a resource. + + """ class RemoteError(GenericError): @@ -95,19 +136,14 @@ class RemoteError(GenericError): remote node. It usually signifies a real programming bug. """ - pass - -class InvalidOS(GenericError): - """Missing OS on node. - This is raised when an OS exists on the master (or is otherwise - requested to the code) but not on the target node. +class SignatureError(GenericError): + """Error authenticating a remote message. - This exception has three arguments: - - the name of the os - - the source directory, if any - - the reason why we consider this an invalid OS (text of error message) + This is raised when the hmac signature on a message doesn't verify correctly + to the message itself. It can happen because of network unreliability or + because of spurious traffic. """ @@ -122,12 +158,21 @@ class ParameterError(GenericError): The argument to this exception should be the parameter name. """ - pass + + +class ResultValidationError(GenericError): + """The iallocation results fails validation. + + """ class OpPrereqError(GenericError): """Prerequisites for the OpCode are not fulfilled. + This exception will have either one or two arguments. For the + two-argument construction, the second argument should be one of the + ECODE_* codes. + """ @@ -137,8 +182,8 @@ class OpExecError(GenericError): """ -class OpRetryError(OpExecError): - """Error during OpCode execution, action can be retried. +class OpResultError(GenericError): + """Issue with OpCode result. """ @@ -161,6 +206,12 @@ class JobLost(GenericError): """ +class JobFileCorrupted(GenericError): + """Job file could not be properly decoded/restored. + + """ + + class ResolverError(GenericError): """Host name cannot be resolved. @@ -198,13 +249,25 @@ class UnitParseError(GenericError): """ + +class ParseError(GenericError): + """Generic parse error. + + Raised when unable to parse user input. + + """ + + class TypeEnforcementError(GenericError): """Unable to enforce data type. """ -class SshKeyError(GenericError): - """Invalid SSH key. + +class X509CertError(GenericError): + """Invalid X509 certificate. + + This error has two arguments: the certificate filename and the error cause. """ @@ -223,21 +286,36 @@ class CommandError(GenericError): """ +class StorageError(GenericError): + """Storage-related exception. + + """ + + +class InotifyError(GenericError): + """Error raised when there is a failure setting up an inotify watcher. + + """ + + class QuitGanetiException(Exception): - """Signal that Ganeti that it must quit. + """Signal Ganeti that it must quit. - This is not necessarily an error (and thus not a subclass of GenericError), - but it's an exceptional circumstance and it is thus treated. This instance - should be instantiated with two values. The first one will specify whether an - error should returned to the caller, and the second one will be the returned - result (either as an error or as a normal result). + This is not necessarily an error (and thus not a subclass of + GenericError), but it's an exceptional circumstance and it is thus + treated. This exception should be instantiated with two values. The + first one will specify the return code to the caller, and the second + one will be the returned result (either as an error or as a normal + result). Usually only the leave cluster rpc call should return + status True (as there it's expected we quit), every other call will + return status False (as a critical error was encountered). Examples:: # Return a result of "True" to the caller, but quit ganeti afterwards - raise QuitGanetiException(False, True) + raise QuitGanetiException(True, None) # Send an error to the caller, and quit ganeti - raise QuitGanetiException(True, "Fatal safety violation, shutting down") + raise QuitGanetiException(False, "Fatal safety violation, shutting down") """ @@ -265,6 +343,81 @@ class JobQueueFull(JobQueueError): """ +class ConfdMagicError(GenericError): + """A magic fourcc error in Ganeti confd. + + Errors processing the fourcc in ganeti confd datagrams. + + """ + + +class ConfdClientError(GenericError): + """A magic fourcc error in Ganeti confd. + + Errors in the confd client library. + + """ + + +class UdpDataSizeError(GenericError): + """UDP payload too big. + + """ + + +class NoCtypesError(GenericError): + """python ctypes module is not found in the system. + + """ + + +class IPAddressError(GenericError): + """Generic IP address error. + + """ + + +class LuxiError(GenericError): + """LUXI error. + + """ + + +class QueryFilterParseError(ParseError): + """Error while parsing query filter. + + This exception must be instantiated with two values. The first one is a + string with an error description, the second one is an instance of a subclass + of C{pyparsing.ParseBaseException} (used to display the exact error + location). + + """ + def GetDetails(self): + """Returns a list of strings with details about the error. + + """ + try: + (_, inner) = self.args + except IndexError: + return None + + return [str(inner.line), + (" " * (inner.column - 1)) + "^", + str(inner)] + + +class RapiTestResult(GenericError): + """Exception containing results from RAPI test utilities. + + """ + + +class FileStoragePathError(GenericError): + """Error from file storage path validation. + + """ + + # errors should be added above @@ -303,17 +456,34 @@ def EncodeException(err): return (err.__class__.__name__, err.args) -def MaybeRaise(result): - """If this looks like an encoded Ganeti exception, raise it. +def GetEncodedError(result): + """If this looks like an encoded Ganeti exception, return it. This function tries to parse the passed argument and if it looks - like an encoding done by EncodeException, it will re-raise it. + like an encoding done by EncodeException, it will return the class + object and arguments. """ tlt = (tuple, list) if (isinstance(result, tlt) and len(result) == 2 and isinstance(result[1], tlt)): # custom ganeti errors - err_class = GetErrorClass(result[0]) - if err_class is not None: - raise err_class, tuple(result[1]) + errcls = GetErrorClass(result[0]) + if errcls: + return (errcls, tuple(result[1])) + + return None + + +def MaybeRaise(result): + """If this looks like an encoded Ganeti exception, raise it. + + This function tries to parse the passed argument and if it looks + like an encoding done by EncodeException, it will re-raise it. + + """ + error = GetEncodedError(result) + if error: + (errcls, args) = error + # pylint: disable=W0142 + raise errcls(*args)