compute: Don't warn if disk overcommit params unset

Due to a small logic error, we were emitting a warning about a
deprecated option when the user tried to live migrate an instance using
microversion 2.25 even though the user hadn't actually set that option.
Correct this.

Change-Id: Ib61e817bd4ced9b5533e7c7f9d8f0b45fe81c211
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>
Story: 2009657
Task: 43836

openstackclient/compute/v2/server.py

@@ -2621,7 +2621,7 @@ revert to release the new server and restart the old one.""")
         disk_group.add_argument(
             '--disk-overcommit',
             action='store_true',
-            default=False,
+            default=None,
             help=_(
                 'Allow disk over-commit on the destination host'
                 '(supported with --os-compute-api-version 2.24 or below)'
@@ -2631,7 +2631,6 @@ revert to release the new server and restart the old one.""")
             '--no-disk-overcommit',
             dest='disk_overcommit',
             action='store_false',
-            default=False,
             help=_(
                 'Do not over-commit disk on the destination host (default)'
                 '(supported with --os-compute-api-version 2.24 or below)'
@@ -2693,6 +2692,11 @@ revert to release the new server and restart the old one.""")
 
             if compute_client.api_version < api_versions.APIVersion('2.25'):
                 kwargs['disk_over_commit'] = parsed_args.disk_overcommit
+                # We can't use an argparse default value because then we can't
+                # distinguish between explicit 'False' and unset for the below
+                # case (microversion >= 2.25)
+                if kwargs['disk_over_commit'] is None:
+                    kwargs['disk_over_commit'] = False
             elif parsed_args.disk_overcommit is not None:
                 # TODO(stephenfin): Raise an error here in OSC 7.0
                 msg = _(

openstackclient/tests/unit/compute/v2/test_server.py

@@ -4812,7 +4812,7 @@ class TestServerMigrate(TestServer):
         verifylist = [
             ('live_migration', False),
             ('block_migration', None),
-            ('disk_overcommit', False),
+            ('disk_overcommit', None),
             ('wait', False),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
@@ -4834,7 +4834,7 @@ class TestServerMigrate(TestServer):
             ('live_migration', False),
             ('host', 'fakehost'),
             ('block_migration', None),
-            ('disk_overcommit', False),
+            ('disk_overcommit', None),
             ('wait', False),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
@@ -4856,7 +4856,7 @@ class TestServerMigrate(TestServer):
         verifylist = [
             ('live_migration', False),
             ('block_migration', True),
-            ('disk_overcommit', False),
+            ('disk_overcommit', None),
             ('wait', False),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
@@ -4897,7 +4897,7 @@ class TestServerMigrate(TestServer):
             ('live_migration', False),
             ('host', 'fakehost'),
             ('block_migration', None),
-            ('disk_overcommit', False),
+            ('disk_overcommit', None),
             ('wait', False),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
@@ -4923,7 +4923,7 @@ class TestServerMigrate(TestServer):
             ('live_migration', True),
             ('host', None),
             ('block_migration', None),
-            ('disk_overcommit', False),
+            ('disk_overcommit', None),
             ('wait', False),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
@@ -4947,7 +4947,7 @@ class TestServerMigrate(TestServer):
             ('live_migration', True),
             ('host', 'fakehost'),
             ('block_migration', None),
-            ('disk_overcommit', False),
+            ('disk_overcommit', None),
             ('wait', False),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
@@ -4975,7 +4975,7 @@ class TestServerMigrate(TestServer):
             ('live_migration', True),
             ('host', 'fakehost'),
             ('block_migration', None),
-            ('disk_overcommit', False),
+            ('disk_overcommit', None),
             ('wait', False),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
@@ -5002,7 +5002,7 @@ class TestServerMigrate(TestServer):
         verifylist = [
             ('live_migration', True),
             ('block_migration', True),
-            ('disk_overcommit', False),
+            ('disk_overcommit', None),
             ('wait', False),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
@@ -5088,7 +5088,7 @@ class TestServerMigrate(TestServer):
         verifylist = [
             ('live_migration', False),
             ('block_migration', None),
-            ('disk_overcommit', False),
+            ('disk_overcommit', None),
             ('wait', True),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
@@ -5108,7 +5108,7 @@ class TestServerMigrate(TestServer):
         verifylist = [
             ('live_migration', False),
             ('block_migration', None),
-            ('disk_overcommit', False),
+            ('disk_overcommit', None),
             ('wait', True),
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)