credentials.py 文件源码

def _create_fetcher(self, relative_uri):
        def fetch_creds():
            try:
                response = self._fetcher.retrieve_uri(relative_uri)
            except MetadataRetrievalError as e:
                logger.debug("Error retrieving ECS metadata: %s", e,
                             exc_info=True)
                raise CredentialRetrievalError(provider=self.METHOD,
                                               error_msg=str(e))
            return {
                'access_key': response['AccessKeyId'],
                'secret_key': response['SecretAccessKey'],
                'token': response['Token'],
                'expiry_time': response['Expiration'],
            }
        return fetch_creds