docs: def _get_es_version(self, config):
          """
          Get the running version of elasticsearch.
          """
          try:
              data = self._get_data(config.url, config, send_sc=False)
              # pre-release versions of elasticearch are suffixed with -rcX etc..
              # peel that off so that the map below doesn't error out
              version = data['version']['number'].split('-')[0]
              version = [int(p) for p in version.split('.')[0:3]]
          except AuthenticationError:
              raise
          except Exception as e:
              self.warning("Error while trying to get Elasticsearch version from %s %s" % (config.url, str(e)))
              version = [1, 0, 0]
  
          self.service_metadata('version', version)
          self.log.debug("Elasticsearch version is %s" % version)
          return version