Fix config merging for isolation and storage_opt keys

Signed-off-by: Joffrey F <joffrey@docker.com>

compose/config/config.py

@@ -91,6 +91,7 @@ DOCKER_CONFIG_KEYS = [
     'healthcheck',
     'image',
     'ipc',
+    'isolation',
     'labels',
     'links',
     'mac_address',
@@ -1042,6 +1043,7 @@ def merge_service_dicts(base, override, version):
     md.merge_mapping('networks', parse_networks)
     md.merge_mapping('sysctls', parse_sysctls)
     md.merge_mapping('depends_on', parse_depends_on)
+    md.merge_mapping('storage_opt', parse_flat_dict)
     md.merge_sequence('links', ServiceLink.parse)
     md.merge_sequence('secrets', types.ServiceSecret.parse)
     md.merge_sequence('configs', types.ServiceConfig.parse)

compose/service.py

@@ -85,6 +85,7 @@ HOST_CONFIG_KEYS = [
     'group_add',
     'init',
     'ipc',
+    'isolation',
     'read_only',
     'log_driver',
     'log_opt',

tests/unit/config/config_test.py

@@ -2644,6 +2644,45 @@ class ConfigTest(unittest.TestCase):
             ['c 7:128 rwm', 'x 3:244 rw', 'f 0:128 n']
         )
 
+    def test_merge_isolation(self):
+        base = {
+            'image': 'bar',
+            'isolation': 'default',
+        }
+
+        override = {
+            'isolation': 'hyperv',
+        }
+
+        actual = config.merge_service_dicts(base, override, V2_3)
+        assert actual == {
+            'image': 'bar',
+            'isolation': 'hyperv',
+        }
+
+    def test_merge_storage_opt(self):
+        base = {
+            'image': 'bar',
+            'storage_opt': {
+                'size': '1G',
+                'readonly': 'false',
+            }
+        }
+
+        override = {
+            'storage_opt': {
+                'size': '2G',
+                'encryption': 'aes',
+            }
+        }
+
+        actual = config.merge_service_dicts(base, override, V2_3)
+        assert actual['storage_opt'] == {
+            'size': '2G',
+            'readonly': 'false',
+            'encryption': 'aes',
+        }
+
     def test_external_volume_config(self):
         config_details = build_config_details({
             'version': '2',