'Attach a volume to a node.
:param node: Node where to attach volume
:type node: :class:`Node`
:param volume: The ID of the volume
:type volume: :class:`StorageVolume`
:param device: Unsed parameter
:return: True or False representing operation successful
:rtype:   ``bool``'

def attach_volume(self, node, volume, device=None):

    action = self._get_project_action(('volume/%s/attach' % volume.id))
    data = {'instanceId': node.id, 'volumeId': volume.id}
    self.connection.request(action, data=data, method='POST')
    return True
