X-Git-Url: https://code.grnet.gr/git/ganeti-local/blobdiff_plain/a8083063386109da1f7d95cb441152cad79bc15f..82d9caef3459e6e428b33d444e970b29ccd97cc9:/lib/errors.py

diff --git a/lib/errors.py b/lib/errors.py
index 7bcd564..6efd9aa 100644
--- a/lib/errors.py
+++ b/lib/errors.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#
 #
 
 # Copyright (C) 2006, 2007 Google Inc.
@@ -104,8 +104,9 @@ class InvalidOS(GenericError):
   This is raised when an OS exists on the master (or is otherwise
   requested to the code) but not on the target node.
 
-  This exception has two arguments:
+  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)
 
   """
@@ -129,11 +130,19 @@ class OpPrereqError(GenericError):
 
   """
 
+
 class OpExecError(GenericError):
   """Error during OpCode execution.
 
   """
 
+
+class OpRetryError(OpExecError):
+  """Error during OpCode execution, action can be retried.
+
+  """
+
+
 class OpCodeUnknown(GenericError):
   """Unknown opcode submitted.
 
@@ -142,6 +151,29 @@ class OpCodeUnknown(GenericError):
 
   """
 
+
+class JobLost(GenericError):
+  """Submitted job lost.
+
+  The job was submitted but it cannot be found in the current job
+  list.
+
+  """
+
+
+class ResolverError(GenericError):
+  """Host name cannot be resolved.
+
+  This is not a normal situation for Ganeti, as we rely on having a
+  working resolver.
+
+  The non-resolvable hostname is available as the first element of the
+  args tuple; the other two elements of the tuple are the first two
+  args of the socket.gaierror exception (error code and description).
+
+  """
+
+
 class HooksFailure(GenericError):
   """A generic hook failure.
 
@@ -149,6 +181,7 @@ class HooksFailure(GenericError):
 
   """
 
+
 class HooksAbort(HooksFailure):
   """A required hook has failed.
 
@@ -159,6 +192,7 @@ class HooksAbort(HooksFailure):
 
   """
 
+
 class UnitParseError(GenericError):
   """Unable to parse size unit.
 
@@ -167,4 +201,74 @@ class UnitParseError(GenericError):
 
 class SshKeyError(GenericError):
   """Invalid SSH key.
+
+  """
+
+
+class TagError(GenericError):
+  """Generic tag error.
+
+  The argument to this exception will show the exact error.
+
+  """
+
+
+class CommandError(GenericError):
+  """External command error.
+
+  """
+
+
+class QuitGanetiException(Exception):
+  """Signal that 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).
+
+  Examples:
+    # Return a result of "True" to the caller, but quit ganeti afterwards
+    raise QuitGanetiException(False, True)
+    # Send an error to the caller, and quit ganeti
+    raise QuitGanetiException(True, "Fatal safety violation, shutting down")
+
+  """
+
+
+class JobQueueError(GenericError):
+  """Job queue error.
+
+  """
+
+
+class JobQueueDrainError(JobQueueError):
+  """Job queue is marked for drain error.
+
+  This is raised when a job submission attempt is made but the queue
+  is marked for drain.
+
+  """
+
+
+# errors should be added above
+
+
+def GetErrorClass(name):
+  """Return the class of an exception.
+
+  Given the class name, return the class itself.
+
+  @type name: str
+  @param name: the exception name
+  @rtype: class
+  @return: the actual class, or None if not found
+
   """
+  item = globals().get(name, None)
+  if item is not None:
+    if not (isinstance(item, type(Exception)) and
+            issubclass(item, GenericError)):
+      item = None
+  return item