'The cluster :ref:`nodes info <es-guide-reference-api-admin-cluster-state>` API allows to retrieve one or more (or all) of
the cluster nodes information.'

def nodes_info(self, nodes=None):

    parts = ['_cluster', 'nodes']
    if nodes:
        parts.append(','.join(nodes))
    path = make_path(*parts)
    return self.conn._send_request('GET', path)
