docs: def from_ssl(self,
                   ca_certs,
                   client_cert,
                   client_key,
                   hosts=default.ELASTICSEARCH_HOSTS,
                   use_ssl=True,
                   verify_certs=True, **kwargs):
          """
          Initialize a Elasticsearch client by SSL.
  
          :param ca_certs: optional path to CA bundle. See
          https://urllib3.readthedocs.io/en/latest/security.html#using-certifi-with-urllib3
          :param client_cert: path to the file containing the private key and the
          certificate, or cert only if using client_key
          :param client_key: path to the file containing the private key if using
          separate cert and key files (client_cert will contain only the cert)
          :param hosts: hostname of the node
          :param use_ssl: use ssl for the connection if `True`
          :param verify_certs: whether to verify SSL certificates
          :return: void
          """
          self.client = Elasticsearch(hosts=hosts,
                                      use_ssl=use_ssl,
                                      verify_certs=verify_certs,
                                      ca_certs=ca_certs,
                                      client_cert=client_cert,
                                      client_key=client_key, **kwargs)
          logger.info('Initialize SSL Elasticsearch Client: %s.' % self.client)