def get_dynamic_metadata(self, requested_info):
        result = None
        try:
            url = self.DYNAMICDATA_URL + "instance-identity/document/"
            r = requests.get(url)
            content = r.content
            content_as_dict = json.loads(content)
            result = content_as_dict.get(requested_info, None)
        except:
            raise
        return result
Called when new progress information should be reported.
dataset/ETHPy150Open wcannon/saltconf2015/phoenix/infrastructure/s3/minion/scripts/helper.py/Helper.get_dynamic_metadata--crossover with--dataset/ETHPy150Open ganeti/ganeti/lib/masterd/instance.py/_RemoteExportCb.ReportProgress