hyper-v rbd volume support

Ceph 16 (Pacific) will support attaching RBD images to Windows
hosts as well as Hyper-V VMs [1].

This patch updates the Hyper-V driver so that it may be able to
consume RBD volumes.

We're also updating the os-win requirement to 5.4.0. It should've
been bumped by [2], vms won't spawn without it. Note this introduces no
new or unmet direct or in-direct version dependencies and so is included
as part of this change.

[1] https://github.com/ceph/ceph/pull/33750
[2] Ibe6aff4edeb32208bc9865e9216a7432caddab2b

Implements: blueprint hyperv-rbd

Change-Id: I9ad90817648ca12f80a6b53f6ba728df15cbafab

lower-constraints.txt

@@ -64,7 +64,7 @@ os-resource-classes==0.4.0
 os-service-types==1.7.0
 os-traits==2.5.0
 os-vif==1.14.0
-os-win==5.1.0
+os-win==5.4.0
 os-xenapi==0.3.4
 osc-lib==1.10.0
 oslo.cache==1.26.0

nova/tests/unit/virt/hyperv/test_volumeops.py

@@ -599,3 +599,28 @@ class SMBFSVolumeDriverTestCase(test_base.HyperVBaseTestCase):
         mock_set_qos_specs.assert_called_once_with(
             mock.sentinel.disk_path,
             fake_total_iops_sec)
+
+
+class RBDVolumeDriver(test_base.HyperVBaseTestCase):
+    def test_get_vol_driver(self):
+        self._volumeops = volumeops.VolumeOps()
+        self._volumeops._volutils = mock.MagicMock()
+        self._volumeops._vmutils = mock.Mock()
+
+        connection_info = get_fake_connection_info()
+        connection_info['driver_volume_type'] = 'rbd'
+
+        drv = self._volumeops._get_volume_driver(connection_info)
+
+        # Not much to test here. The Hyper-V driver volume attach code
+        # is mostly generic and all the RBD related plumbing is handled
+        # by os-brick.
+        #
+        # We'll just ensure that the RBD driver can be retrieved and that it
+        # has the right fields.
+        self.assertTrue(drv._is_block_dev)
+        self.assertEqual('rbd', drv._protocol)
+        # Hyper-V requires a virtual SCSI disk so we'll ask for a
+        # local attach.
+        self.assertEqual(dict(do_local_attach=True),
+                         drv._extra_connector_args)

nova/virt/hyperv/constants.py

@@ -90,3 +90,4 @@ IOPS_BASE_SIZE = 8 * units.Ki
 STORAGE_PROTOCOL_ISCSI = 'iscsi'
 STORAGE_PROTOCOL_FC = 'fibre_channel'
 STORAGE_PROTOCOL_SMBFS = 'smbfs'
+STORAGE_PROTOCOL_RBD = 'rbd'

nova/virt/hyperv/volumeops.py

@@ -46,7 +46,8 @@ class VolumeOps(object):
         self.volume_drivers = {
             constants.STORAGE_PROTOCOL_SMBFS: SMBFSVolumeDriver(),
             constants.STORAGE_PROTOCOL_ISCSI: ISCSIVolumeDriver(),
-            constants.STORAGE_PROTOCOL_FC: FCVolumeDriver()}
+            constants.STORAGE_PROTOCOL_FC: FCVolumeDriver(),
+            constants.STORAGE_PROTOCOL_RBD: RBDVolumeDriver()}
 
     def _get_volume_driver(self, connection_info):
         driver_type = connection_info.get('driver_volume_type')
@@ -369,3 +370,9 @@ class SMBFSVolumeDriver(BaseVolumeDriver):
 class FCVolumeDriver(BaseVolumeDriver):
     _is_block_dev = True
     _protocol = constants.STORAGE_PROTOCOL_FC
+
+
+class RBDVolumeDriver(BaseVolumeDriver):
+    _is_block_dev = True
+    _protocol = constants.STORAGE_PROTOCOL_RBD
+    _extra_connector_args = dict(do_local_attach=True)

releasenotes/notes/rbd-hyperv-support-672a34b1d87e68eb.yaml

@@ -0,0 +1,4 @@
+features:
+  - |
+    The Hyper-V driver can now attach Cinder RBD volumes. The minimum
+    requirements are Ceph 16 (Pacific) and Windows Server 2016.

requirements.txt

@@ -55,7 +55,7 @@ os-brick>=4.2.0 # Apache-2.0
 os-resource-classes>=0.4.0 # Apache-2.0
 os-traits>=2.5.0 # Apache-2.0
 os-vif>=1.14.0 # Apache-2.0
-os-win>=5.1.0 # Apache-2.0
+os-win>=5.4.0 # Apache-2.0
 castellan>=0.16.0 # Apache-2.0
 microversion-parse>=0.2.1 # Apache-2.0
 os-xenapi>=0.3.4 # Apache-2.0