Fix Multi_Scheduler to process host capabilities

To fix bug #1000403, make sure that each driver held by the
Multi Scheduler gets called during update_service_capabilities.

Change-Id: Iee8141f1a6dcfa24101640626d209d2d65776339

.mailmap

@@ -8,6 +8,7 @@
 <anotherjesse@gmail.com> <jesse@aire.local>
 <ant@openstack.org> <amesserl@rackspace.com>
 <Armando.Migliaccio@eu.citrix.com> <armando.migliaccio@citrix.com>
+<Armando.Migliaccio@eu.citrix.com> <amigliaccio@internap.com>
 <brian.elliott@rackspace.com> <bdelliott@gmail.com>
 <brian.lamar@rackspace.com> <brian.lamar@gmail.com>
 <brian.waldon@rackspace.com> <bcwaldon@gmail.com>

nova/scheduler/multi.py

@@ -81,3 +81,9 @@ class MultiScheduler(driver.Scheduler):
 
     def schedule_prep_resize(self, *args, **kwargs):
         return self.drivers['compute'].schedule_prep_resize(*args, **kwargs)
+
+    def update_service_capabilities(self, service_name, host, capabilities):
+        # Multi scheduler is only a holder of sub-schedulers, so
+        # pass the capabilities to the schedulers that matter
+        for d in self.drivers.values():
+            d.update_service_capabilities(service_name, host, capabilities)

nova/tests/scheduler/test_multi_scheduler.py

@@ -28,6 +28,10 @@ from nova.tests.scheduler import test_scheduler
 class FakeComputeScheduler(driver.Scheduler):
     is_fake_compute = True
 
+    def __init__(self):
+        super(FakeComputeScheduler, self).__init__()
+        self.is_update_caps_called = False
+
     def schedule_theoretical(self, *args, **kwargs):
         pass
 
@@ -38,6 +42,10 @@ class FakeComputeScheduler(driver.Scheduler):
 class FakeVolumeScheduler(driver.Scheduler):
     is_fake_volume = True
 
+    def __init__(self):
+        super(FakeVolumeScheduler, self).__init__()
+        self.is_update_caps_called = False
+
     def schedule_create_volume(self, *args, **kwargs):
         pass
 
@@ -103,3 +111,17 @@ class MultiDriverTestCase(test_scheduler.SchedulerTestCase):
         self.mox.ReplayAll()
         mgr.schedule(ctxt, 'compute', method, *fake_args, **fake_kwargs)
         mgr.schedule(ctxt, 'volume', method, *fake_args, **fake_kwargs)
+
+    def test_update_service_capabilities(self):
+        def fake_update_service_capabilities(self, service, host, caps):
+            self.is_update_caps_called = True
+
+        mgr = self._manager
+        self.stubs.Set(driver.Scheduler,
+                       'update_service_capabilities',
+                       fake_update_service_capabilities)
+        self.assertFalse(mgr.drivers['compute'].is_update_caps_called)
+        self.assertFalse(mgr.drivers['volume'].is_update_caps_called)
+        mgr.update_service_capabilities('foo_svc', 'foo_host', 'foo_caps')
+        self.assertTrue(mgr.drivers['compute'].is_update_caps_called)
+        self.assertTrue(mgr.drivers['volume'].is_update_caps_called)