Merge branch 'issue-272' into 'master'

Make some errors human readable

circle/common/models.py

@@ -488,7 +488,7 @@ class HumanReadableException(HumanReadableObject, Exception):
                     "Level should be the name of an attribute of django."
                     "contrib.messages (and it should be callable with "
                     "(request, message)). Like 'error', 'warning'.")
-        else:
+        elif not hasattr(self, "level"):
             self.level = "error"
 
     def send_message(self, request, level=None):

circle/manager/scheduler.py

@@ -18,26 +18,37 @@
 from logging import getLogger
 
 from django.db.models import Sum
+from django.utils.translation import ugettext_noop
+
+from common.models import HumanReadableException
 
 logger = getLogger(__name__)
 
 
-class NotEnoughMemoryException(Exception):
+class SchedulerError(HumanReadableException):
+    admin_message = None
 
-    def __init__(self, message=None):
-        if message is None:
-            message = "No node has enough memory to accomodate the guest."
+    def __init__(self, params=None, level=None, **kwargs):
+        kwargs.update(params or {})
+        super(SchedulerError, self).__init__(
+            level, self.message, self.admin_message or self.message,
+            kwargs)
 
-        Exception.__init__(self, message)
 
+class NotEnoughMemoryException(SchedulerError):
+    message = ugettext_noop(
+        "The resources required for launching the virtual machine are not "
+        "available currently. Please try again later.")
 
-class TraitsUnsatisfiableException(Exception):
+    admin_message = ugettext_noop(
+        "The required free memory for launching the virtual machine is not "
+        "available on any usable node currently. Please try again later.")
 
-    def __init__(self, message=None):
-        if message is None:
-            message = "No node can satisfy all required traits of the guest."
 
-        Exception.__init__(self, message)
+class TraitsUnsatisfiableException(SchedulerError):
+    message = ugettext_noop(
+        "No node can satisfy the required traits of the "
+        "new vitual machine currently.")
 
 
 def select_node(instance, nodes):

circle/vm/operations.py

@@ -620,6 +620,17 @@ class ShutdownOperation(InstanceOperation):
         self.instance.yield_node()
         self.instance.yield_vnc_port()
 
+    def on_abort(self, activity, error):
+        if isinstance(error, TimeLimitExceeded):
+            activity.result = humanize_exception(ugettext_noop(
+                "The virtual machine did not switch off in the provided time "
+                "limit. Most of the time this is caused by incorrect ACPI "
+                "settings. You can also try to power off the machine from the "
+                "operating system manually."), error)
+            activity.resultant_state = None
+        else:
+            super(ShutdownOperation, self).on_abort(activity, error)
+
 
 register_operation(ShutdownOperation)