openstack/nova
Code Issues Proposed changes

Merge "Fix is_volume_backed_instance() for unset image_ref"

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Jenkins 2015-11-18 09:34:03 +00:00 committed by Gerrit Code Review
commit 802d320236
2 changed files with 39 additions and 13 deletions
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11
nova/compute/api.py
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@ -3241,13 +3241,12 @@ class API(base.Base):
return bdms.root_bdm()
def is_volume_backed_instance(self, context, instance, bdms=None):
if not instance.image_ref:
return True
root_bdm = self._get_root_bdm(context, instance, bdms)
if not root_bdm:
return False
return root_bdm.is_volume
if root_bdm is not None:
return root_bdm.is_volume
# in case we hit a very old instance without root bdm, we _assume_ that
# instance is backed by a volume, if and only if image_ref is not set
return not instance.image_ref
@check_instance_lock
@check_instance_cell

41
nova/tests/unit/compute/test_compute.py
View File

@ -8956,24 +8956,30 @@ class ComputeAPITestCase(BaseTestCase):
self.assertIsNone(
self.compute_api._volume_size(inst_type, blank_bdm))
def test_is_volume_backed_instance_no_image(self):
def test_is_volume_backed_instance_no_bdm_no_image(self):
ctxt = self.context
instance = self._create_fake_instance_obj({'image_ref': ''})
self.assertTrue(
self.compute_api.is_volume_backed_instance(ctxt, instance, None))
def test_is_volume_backed_instance_no_bdm(self):
def test_is_volume_backed_instance_empty_bdm_with_image(self):
ctxt = self.context
instance = self._create_fake_instance_obj({'root_device_name': 'vda'})
instance = self._create_fake_instance_obj({
'root_device_name': 'vda',
'image_ref': FAKE_IMAGE_REF
})
self.assertFalse(
self.compute_api.is_volume_backed_instance(
ctxt, instance,
block_device_obj.block_device_make_list(ctxt, [])))
def test_is_volume_backed_instance_bdm_volume(self):
def test_is_volume_backed_instance_bdm_volume_no_image(self):
ctxt = self.context
instance = self._create_fake_instance_obj({'root_device_name': 'vda'})
instance = self._create_fake_instance_obj({
'root_device_name': 'vda',
'image_ref': ''
})
bdms = block_device_obj.block_device_make_list(ctxt,
[fake_block_device.FakeDbBlockDeviceDict(
{'source_type': 'volume',
@ -8985,9 +8991,14 @@ class ComputeAPITestCase(BaseTestCase):
self.assertTrue(
self.compute_api.is_volume_backed_instance(ctxt, instance, bdms))
def test_is_volume_backed_instance_bdm_local(self):
def test_is_volume_backed_instance_bdm_local_no_image(self):
# if the root device is local the instance is not volume backed, even
# if no image_ref is set.
ctxt = self.context
instance = self._create_fake_instance_obj({'root_device_name': 'vda'})
instance = self._create_fake_instance_obj({
'root_device_name': 'vda',
'image_ref': ''
})
bdms = block_device_obj.block_device_make_list(ctxt,
[fake_block_device.FakeDbBlockDeviceDict(
{'source_type': 'volume',
@ -9008,6 +9019,22 @@ class ComputeAPITestCase(BaseTestCase):
self.assertFalse(
self.compute_api.is_volume_backed_instance(ctxt, instance, bdms))
def test_is_volume_backed_instance_bdm_volume_with_image(self):
ctxt = self.context
instance = self._create_fake_instance_obj({
'root_device_name': 'vda',
'image_ref': FAKE_IMAGE_REF
})
bdms = block_device_obj.block_device_make_list(ctxt,
[fake_block_device.FakeDbBlockDeviceDict(
{'source_type': 'volume',
'device_name': '/dev/vda',
'volume_id': 'fake_volume_id',
'boot_index': 0,
'destination_type': 'volume'})])
self.assertTrue(
self.compute_api.is_volume_backed_instance(ctxt, instance, bdms))
def test_is_volume_backed_instance_bdm_snapshot(self):
ctxt = self.context
instance = self._create_fake_instance_obj({'root_device_name': 'vda'})