Add support for custom name in SwarmSpec

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

docker/utils/types.py

@@ -101,7 +101,7 @@ class SwarmSpec(DictType):
                  snapshot_interval=None, keep_old_snapshots=None,
                  log_entries_for_slow_followers=None, heartbeat_tick=None,
                  election_tick=None, dispatcher_heartbeat_period=None,
-                 node_cert_expiry=None, external_ca=None):
+                 node_cert_expiry=None, external_ca=None, name=None):
         if task_history_retention_limit is not None:
             self['Orchestration'] = {
                 'TaskHistoryRetentionLimit': task_history_retention_limit
@@ -127,6 +127,9 @@ class SwarmSpec(DictType):
                 'ExternalCA': external_ca
             }
 
+        if name is not None:
+            self['Name'] = name
+
 
 class SwarmExternalCA(DictType):
     def __init__(self, url, protocol=None, options=None):

docs/swarm.md

@@ -106,6 +106,7 @@ argument in `Client.init_swarm`.
 * node_cert_expiry (int): Automatic expiry for nodes certificates.
 * external_ca (dict): Configuration for forwarding signing requests to an
   external certificate authority. Use `docker.utils.SwarmExternalCA`.
+* name (string): Swarm's name
 
 **Returns:** `docker.utils.SwarmSpec` instance.
 
@@ -194,3 +195,6 @@ Update the Swarm's configuration
   Default: `None`.
 * rotate_worker_token (bool): Rotate the worker join token. Default: `False`.
 * rotate_manager_token (bool): Rotate the manager join token. Default: `False`.
+
+**Returns:** `True` if the request went through. Raises an `APIError` if it
+  fails.

tests/integration/swarm_test.py

@@ -96,3 +96,21 @@ class SwarmTest(helpers.BaseTestCase):
             swarm_info_1['JoinTokens']['Worker'] !=
             swarm_info_2['JoinTokens']['Worker']
         )
+
+    @requires_api_version('1.24')
+    def test_update_swarm_name(self):
+        assert self.client.init_swarm('eth0')
+        swarm_info_1 = self.client.inspect_swarm()
+        spec = self.client.create_swarm_spec(
+            node_cert_expiry=7776000000000000, name='reimuhakurei'
+        )
+        assert self.client.update_swarm(
+            version=swarm_info_1['Version']['Index'], swarm_spec=spec
+        )
+        swarm_info_2 = self.client.inspect_swarm()
+
+        assert (
+            swarm_info_1['Version']['Index'] !=
+            swarm_info_2['Version']['Index']
+        )
+        assert swarm_info_2['Spec']['Name'] == 'reimuhakurei'