baremetal: Decode 'config_drive' argument to 'set_provision_state'

ironicclient automatically decoded the base64-encoded byte strings
provided to the 'node.set_provision_state' method. We should do the
same.

Change-Id: Ib4997d11b460078cddf2f422223a67a216cf17df
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

openstack/baremetal/v1/node.py

@@ -465,6 +465,14 @@ class Node(_common.Resource):
                     'Config drive can only be provided with '
                     '"active" and "rebuild" targets'
                 )
+            if isinstance(config_drive, bytes):
+                try:
+                    config_drive = config_drive.decode('utf-8')
+                except UnicodeError:
+                    raise ValueError(
+                        'Config drive must be a dictionary or a base64 '
+                        'encoded string'
+                    )
             # Not a typo - ironic accepts "configdrive" (without underscore)
             body['configdrive'] = config_drive
 

openstack/tests/unit/baremetal/v1/test_node.py

@@ -10,6 +10,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import base64
 from unittest import mock
 
 from keystoneauth1 import adapter
@@ -338,6 +339,20 @@ class TestNodeSetProvisionState(base.TestCase):
             retriable_status_codes=_common.RETRIABLE_STATUS_CODES,
         )
 
+    def test_deploy_with_configdrive_as_bytestring(self):
+        config_drive = base64.b64encode(b'foo')
+        result = self.node.set_provision_state(
+            self.session, 'active', config_drive=config_drive
+        )
+        self.assertIs(result, self.node)
+        self.session.put.assert_called_once_with(
+            'nodes/%s/states/provision' % self.node.id,
+            json={'target': 'active', 'configdrive': config_drive.decode()},
+            headers=mock.ANY,
+            microversion=None,
+            retriable_status_codes=_common.RETRIABLE_STATUS_CODES,
+        )
+
     def test_rebuild_with_configdrive(self):
         result = self.node.set_provision_state(
             self.session, 'rebuild', config_drive='abcd'