Add "--type" and "--retype-policy" options to "volume set" command

Add "--type" and "--retype-policy" options to
"volume set" command in volume v2 (v2 only) to
support changing the volume type for a volume

Change-Id: I0153abdb967aee790586a57cef31930e32005c1b
Implements: bp cinder-command-support

doc/source/command-objects/volume.rst

@@ -254,6 +254,8 @@ Set volume properties
         [--property <key=value> [...] ]
         [--image-property <key=value> [...] ]
         [--state <state>]
+        [--type <volume-type>]
+        [--retype-policy <retype-policy>]
         [--bootable | --non-bootable]
         [--read-only | --read-write]
         <volume>
@@ -274,6 +276,20 @@ Set volume properties
 
     Set a property on this volume (repeat option to set multiple properties)
 
+.. option:: --type <volume-type>
+
+    New volume type (name or ID)
+
+    *Volume version 2 only*
+
+.. option:: --retype-policy <retype-policy>
+
+    Migration policy while re-typing volume
+    ("never" or "on-demand", default is "never" )
+    (available only when "--type" option is specified)
+
+    *Volume version 2 only*
+
 .. option:: --bootable
 
     Mark volume as bootable

openstackclient/tests/unit/volume/v2/test_volume.py

@@ -46,6 +46,9 @@ class TestVolume(volume_fakes.TestVolume):
         self.snapshots_mock = self.app.client_manager.volume.volume_snapshots
         self.snapshots_mock.reset_mock()
 
+        self.types_mock = self.app.client_manager.volume.volume_types
+        self.types_mock.reset_mock()
+
         self.consistencygroups_mock = (
             self.app.client_manager.volume.consistencygroups)
         self.consistencygroups_mock.reset_mock()
@@ -1088,11 +1091,14 @@ class TestVolumeMigrate(TestVolume):
 
 class TestVolumeSet(TestVolume):
 
+    volume_type = volume_fakes.FakeType.create_one_type()
+
     def setUp(self):
         super(TestVolumeSet, self).setUp()
 
         self.new_volume = volume_fakes.FakeVolume.create_one_volume()
         self.volumes_mock.get.return_value = self.new_volume
+        self.types_mock.get.return_value = self.volume_type
 
         # Get the command object to test
         self.cmd = volume.SetVolume(self.app, None)
@@ -1221,6 +1227,66 @@ class TestVolumeSet(TestVolume):
             False)
         self.assertIsNone(result)
 
+    def test_volume_set_type(self):
+        arglist = [
+            '--type', self.volume_type.id,
+            self.new_volume.id
+        ]
+        verifylist = [
+            ('retype_policy', None),
+            ('type', self.volume_type.id),
+            ('volume', self.new_volume.id)
+        ]
+
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        result = self.cmd.take_action(parsed_args)
+        self.volumes_mock.retype.assert_called_once_with(
+            self.new_volume.id,
+            self.volume_type.id,
+            'never')
+        self.assertIsNone(result)
+
+    def test_volume_set_type_with_policy(self):
+        arglist = [
+            '--retype-policy', 'on-demand',
+            '--type', self.volume_type.id,
+            self.new_volume.id
+        ]
+        verifylist = [
+            ('retype_policy', 'on-demand'),
+            ('type', self.volume_type.id),
+            ('volume', self.new_volume.id)
+        ]
+
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        result = self.cmd.take_action(parsed_args)
+        self.volumes_mock.retype.assert_called_once_with(
+            self.new_volume.id,
+            self.volume_type.id,
+            'on-demand')
+        self.assertIsNone(result)
+
+    @mock.patch.object(volume.LOG, 'warning')
+    def test_volume_set_with_only_retype_policy(self, mock_warning):
+        arglist = [
+            '--retype-policy', 'on-demand',
+            self.new_volume.id
+        ]
+        verifylist = [
+            ('retype_policy', 'on-demand'),
+            ('volume', self.new_volume.id)
+        ]
+
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        result = self.cmd.take_action(parsed_args)
+        self.volumes_mock.retype.assert_not_called()
+        mock_warning.assert_called_with("'--retype-policy' option will "
+                                        "not work without '--type' option")
+        self.assertIsNone(result)
+
 
 class TestVolumeShow(TestVolume):
 

openstackclient/volume/v2/volume.py

@@ -509,6 +509,19 @@ class SetVolume(command.Command):
                    'in the database with no regard to actual status, '
                    'exercise caution when using)'),
         )
+        parser.add_argument(
+            '--type',
+            metavar='<volume-type>',
+            help=_('New volume type (name or ID)'),
+        )
+        parser.add_argument(
+            '--retype-policy',
+            metavar='<retype-policy>',
+            choices=['never', 'on-demand'],
+            help=_('Migration policy while re-typing volume '
+                   '("never" or "on-demand", default is "never" ) '
+                   '(available only when "--type" option is specified)'),
+        )
         bootable_group = parser.add_mutually_exclusive_group()
         bootable_group.add_argument(
             "--bootable",
@@ -590,6 +603,28 @@ class SetVolume(command.Command):
                 LOG.error(_("Failed to set volume read-only access "
                             "mode flag: %s"), e)
                 result += 1
+        if parsed_args.type:
+            # get the migration policy
+            migration_policy = 'never'
+            if parsed_args.retype_policy:
+                migration_policy = parsed_args.retype_policy
+            try:
+                # find the volume type
+                volume_type = utils.find_resource(
+                    volume_client.volume_types,
+                    parsed_args.type)
+                # reset to the new volume type
+                volume_client.volumes.retype(
+                    volume.id,
+                    volume_type.id,
+                    migration_policy)
+            except Exception as e:
+                LOG.error(_("Failed to set volume type: %s"), e)
+                result += 1
+        elif parsed_args.retype_policy:
+            # If the "--retype-policy" is specified without "--type"
+            LOG.warning(_("'--retype-policy' option will not work "
+                          "without '--type' option"))
 
         kwargs = {}
         if parsed_args.name:

releasenotes/notes/bp-cinder-command-support-413b6d80232f8ece.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Add ``--type`` and ``--retype-policy`` options to ``volume set`` command.
+    [Blueprint `cinder-command-support <https://blueprints.launchpad.net/python-openstackclient/+spec/cinder-command-support>`_]