Updates to the prep_resize scheduler rpc call.

I started looking at this because of the prep_resize rpc call in the compute
manager.  An API server calls prep_resize on the scheduler which then calls it
on a compute node.  I will need to make the same changes on the compute side,
but this is the first step.

The prep_resize call was taking two object IDs, an instance UUID and an
instance_type ID.  Both of these have been converted.  It now takes an instance
dict and an instance_type dict, instead.  It can also handle receiving the old
IDs for backwards compatibility.  prep_resize also took a topic argument that
was unused, so it has just been removed.

There are a number of changes in the scheduler code tied up in this to make it
more explicit about exactly what arguments are expected instead of just using
*args, **kwargs.

Part of blueprint no-db-messaging.

Change-Id: I4af18e5575e2bb60a410fc8edabf3d607c72aabc

1 files changed, 4 insertions, 2 deletions

diff --git a/nova/tests/scheduler/test_chance_scheduler.py b/nova/tests/scheduler/test_chance_scheduler.py
index ec853594b..eabfa93dc 100644
--- a/nova/tests/scheduler/test_chance_scheduler.py
+++ b/nova/tests/scheduler/test_chance_scheduler.py
@@ -149,7 +149,8 @@ class ChanceSchedulerTestCase(test_scheduler.SchedulerTestCase):
         self.mox.StubOutWithMock(driver, 'cast_to_compute_host')
         self.mox.StubOutWithMock(driver, 'encode_instance')
         # instance 1
-        self.driver._schedule(ctxt, 'compute', request_spec).AndReturn('host')
+        self.driver._schedule(ctxt, 'compute', request_spec,
+                              {}).AndReturn('host')
         self.driver.create_instance_db_entry(
             ctxt, mox.Func(_has_launch_index(0)), None
             ).WithSideEffects(_add_uuid(1)).AndReturn(instance1)
@@ -157,7 +158,8 @@ class ChanceSchedulerTestCase(test_scheduler.SchedulerTestCase):
                                     instance_uuid=instance1['uuid'])
         driver.encode_instance(instance1).AndReturn(instance1)
         # instance 2
-        self.driver._schedule(ctxt, 'compute', request_spec).AndReturn('host')
+        self.driver._schedule(ctxt, 'compute', request_spec,
+                              {}).AndReturn('host')
         self.driver.create_instance_db_entry(
             ctxt, mox.Func(_has_launch_index(1)), None
             ).WithSideEffects(_add_uuid(2)).AndReturn(instance2)