api: add rollback_config to service create (#2917)

`rollback_config` was not in the list of `CREATE_SERVICE_KWARGS`
which prevented it from being an argument when creating services.
It has now been added and the problem fixed, allowing services to
have a rollback_config during creation and updating.

Fixes #2832.

Signed-off-by: Fraser Patten <pattenf00@gmail.com>
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
Co-authored-by: Milas Bowman <milas.bowman@docker.com>

docker/models/services.py

@@ -320,6 +320,7 @@ CREATE_SERVICE_KWARGS = [
     'labels',
     'mode',
     'update_config',
+    'rollback_config',
     'endpoint_spec',
 ]
 

tests/integration/models_services_test.py

@@ -30,13 +30,18 @@ class ServiceTest(unittest.TestCase):
             # ContainerSpec arguments
             image="alpine",
             command="sleep 300",
-            container_labels={'container': 'label'}
+            container_labels={'container': 'label'},
+            rollback_config={'order': 'start-first'}
         )
         assert service.name == name
         assert service.attrs['Spec']['Labels']['foo'] == 'bar'
         container_spec = service.attrs['Spec']['TaskTemplate']['ContainerSpec']
         assert "alpine" in container_spec['Image']
         assert container_spec['Labels'] == {'container': 'label'}
+        spec_rollback = service.attrs['Spec'].get('RollbackConfig', None)
+        assert spec_rollback is not None
+        assert ('Order' in spec_rollback and
+               spec_rollback['Order'] == 'start-first')
 
     def test_create_with_network(self):
         client = docker.from_env(version=TEST_API_VERSION)

tests/unit/models_services_test.py

@@ -11,6 +11,7 @@ class CreateServiceKwargsTest(unittest.TestCase):
             'labels': {'key': 'value'},
             'hostname': 'test_host',
             'mode': 'global',
+            'rollback_config': {'rollback': 'config'},
             'update_config': {'update': 'config'},
             'networks': ['somenet'],
             'endpoint_spec': {'blah': 'blah'},
@@ -37,6 +38,7 @@ class CreateServiceKwargsTest(unittest.TestCase):
             'name': 'somename',
             'labels': {'key': 'value'},
             'mode': 'global',
+            'rollback_config': {'rollback': 'config'},
             'update_config': {'update': 'config'},
             'endpoint_spec': {'blah': 'blah'},
         }