Merge pull request #2303 from hannseman/swarm-DataPathAddr

Add support for swarm DataPathAddr

docker/api/swarm.py

@@ -84,7 +84,8 @@ class SwarmApiMixin(object):
     @utils.minimum_version('1.24')
     def init_swarm(self, advertise_addr=None, listen_addr='0.0.0.0:2377',
                    force_new_cluster=False, swarm_spec=None,
-                   default_addr_pool=None, subnet_size=None):
+                   default_addr_pool=None, subnet_size=None,
+                   data_path_addr=None):
         """
         Initialize a new Swarm using the current connected engine as the first
         node.
@@ -115,6 +116,8 @@ class SwarmApiMixin(object):
                 Default: None
             subnet_size (int): SubnetSize specifies the subnet size of the
                 networks created from the default subnet pool. Default: None
+            data_path_addr (string): Address or interface to use for data path
+                traffic. For example, 192.168.1.1, or an interface, like eth0.
 
         Returns:
             ``True`` if successful.
@@ -154,6 +157,15 @@ class SwarmApiMixin(object):
             'ForceNewCluster': force_new_cluster,
             'Spec': swarm_spec,
         }
+
+        if data_path_addr is not None:
+            if utils.version_lt(self._version, '1.30'):
+                raise errors.InvalidVersion(
+                    'Data address path is only available for '
+                    'API version >= 1.30'
+                )
+            data['DataPathAddr'] = data_path_addr
+
         response = self._post_json(url, data=data)
         self._raise_for_status(response)
         return True
@@ -194,7 +206,7 @@ class SwarmApiMixin(object):
 
     @utils.minimum_version('1.24')
     def join_swarm(self, remote_addrs, join_token, listen_addr='0.0.0.0:2377',
-                   advertise_addr=None):
+                   advertise_addr=None, data_path_addr=None):
         """
         Make this Engine join a swarm that has already been created.
 
@@ -213,6 +225,8 @@ class SwarmApiMixin(object):
                 the port number from the listen address is used. If
                 AdvertiseAddr is not specified, it will be automatically
                 detected when possible. Default: ``None``
+            data_path_addr (string): Address or interface to use for data path
+                traffic. For example, 192.168.1.1, or an interface, like eth0.
 
         Returns:
             ``True`` if the request went through.
@@ -222,11 +236,20 @@ class SwarmApiMixin(object):
                 If the server returns an error.
         """
         data = {
-            "RemoteAddrs": remote_addrs,
-            "ListenAddr": listen_addr,
-            "JoinToken": join_token,
-            "AdvertiseAddr": advertise_addr,
+            'RemoteAddrs': remote_addrs,
+            'ListenAddr': listen_addr,
+            'JoinToken': join_token,
+            'AdvertiseAddr': advertise_addr,
         }
+
+        if data_path_addr is not None:
+            if utils.version_lt(self._version, '1.30'):
+                raise errors.InvalidVersion(
+                    'Data address path is only available for '
+                    'API version >= 1.30'
+                )
+            data['DataPathAddr'] = data_path_addr
+
         url = self._url('/swarm/join')
         response = self._post_json(url, data=data)
         self._raise_for_status(response)

docker/models/swarm.py

@@ -35,7 +35,7 @@ class Swarm(Model):
 
     def init(self, advertise_addr=None, listen_addr='0.0.0.0:2377',
              force_new_cluster=False, default_addr_pool=None,
-             subnet_size=None, **kwargs):
+             subnet_size=None, data_path_addr=None, **kwargs):
         """
         Initialize a new swarm on this Engine.
 
@@ -63,6 +63,8 @@ class Swarm(Model):
                 Default: None
             subnet_size (int): SubnetSize specifies the subnet size of the
                 networks created from the default subnet pool. Default: None
+            data_path_addr (string): Address or interface to use for data path
+                traffic. For example, 192.168.1.1, or an interface, like eth0.
             task_history_retention_limit (int): Maximum number of tasks
                 history stored.
             snapshot_interval (int): Number of logs entries between snapshot.
@@ -117,7 +119,8 @@ class Swarm(Model):
             'listen_addr': listen_addr,
             'force_new_cluster': force_new_cluster,
             'default_addr_pool': default_addr_pool,
-            'subnet_size': subnet_size
+            'subnet_size': subnet_size,
+            'data_path_addr': data_path_addr,
         }
         init_kwargs['swarm_spec'] = self.client.api.create_swarm_spec(**kwargs)
         self.client.api.init_swarm(**init_kwargs)

tests/integration/api_swarm_test.py

@@ -233,3 +233,7 @@ class SwarmTest(BaseAPIIntegrationTest):
             self.client.remove_node(node_id, True)
 
         assert e.value.response.status_code >= 400
+
+    @requires_api_version('1.30')
+    def test_init_swarm_data_path_addr(self):
+        assert self.init_swarm(data_path_addr='eth0')

tests/integration/models_swarm_test.py

@@ -31,3 +31,15 @@ class SwarmTest(unittest.TestCase):
             cm.value.response.status_code == 406 or
             cm.value.response.status_code == 503
         )
+
+    def test_join_on_already_joined_swarm(self):
+        client = docker.from_env(version=TEST_API_VERSION)
+        client.swarm.init()
+        join_token = client.swarm.attrs['JoinTokens']['Manager']
+        with pytest.raises(docker.errors.APIError) as cm:
+            client.swarm.join(
+                remote_addrs=['127.0.0.1'],
+                join_token=join_token,
+            )
+        assert cm.value.response.status_code == 503
+        assert 'This node is already part of a swarm.' in cm.value.explanation