Implement swarm node removal

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

docker/api/swarm.py

@@ -224,6 +224,33 @@ class SwarmApiMixin(object):
 
         return self._result(self._get(url, params=params), True)
 
+    @utils.check_resource
+    @utils.minimum_version('1.24')
+    def remove_node(self, node_id, force=False):
+        """
+        Remove a node from the swarm.
+
+        Args:
+            node_id (string): ID of the node to be removed.
+            force (bool): Force remove an active node. Default: `False`
+
+        Raises:
+            :py:class:`docker.errors.NotFound`
+                If the node referenced doesn't exist in the swarm.
+
+            :py:class:`docker.errors.APIError`
+                If the server returns an error.
+        Returns:
+            `True` if the request was successful.
+        """
+        url = self._url('/nodes/{0}', node_id)
+        params = {
+            'force': force
+        }
+        res = self._delete(url, params=params)
+        self._raise_for_status(res)
+        return True
+
     @utils.minimum_version('1.24')
     def update_node(self, node_id, version, node_spec=None):
         """
@@ -231,6 +258,7 @@ class SwarmApiMixin(object):
 
         Args:
 
+            node_id (string): ID of the node to be updated.
             version (int): The version number of the node object being
                 updated. This is required to avoid conflicting writes.
             node_spec (dict): Configuration settings to update. Any values

docker/models/nodes.py

@@ -41,6 +41,25 @@ class Node(Model):
         """
         return self.client.api.update_node(self.id, self.version, node_spec)
 
+    def remove(self, force=False):
+        """
+        Remove this node from the swarm.
+
+        Args:
+            force (bool): Force remove an active node. Default: `False`
+
+        Returns:
+            `True` if the request was successful.
+
+        Raises:
+            :py:class:`docker.errors.NotFound`
+                If the node doesn't exist in the swarm.
+
+            :py:class:`docker.errors.APIError`
+                If the server returns an error.
+        """
+        return self.client.api.remove_node(self.id, force=force)
+
 
 class NodeCollection(Collection):
     """Nodes on the Docker server."""

tests/integration/api_swarm_test.py

@@ -159,3 +159,20 @@ class SwarmTest(BaseAPIIntegrationTest):
                                 node_spec=orig_spec)
         reverted_node = self.client.inspect_node(node['ID'])
         assert orig_spec == reverted_node['Spec']
+
+    @requires_api_version('1.24')
+    def test_remove_main_node(self):
+        assert self.client.init_swarm('eth0')
+        nodes_list = self.client.nodes()
+        node_id = nodes_list[0]['ID']
+        with pytest.raises(docker.errors.NotFound):
+            self.client.remove_node('foobar01')
+        with pytest.raises(docker.errors.APIError) as e:
+            self.client.remove_node(node_id)
+
+        assert e.value.response.status_code == 500
+
+        with pytest.raises(docker.errors.APIError) as e:
+            self.client.remove_node(node_id, True)
+
+        assert e.value.response.status_code == 500