是否可以在云函数中获取项目元数据?

compute engine 在我的 GCP 云函数。这可能吗?

以下是我的尝试:

metadata.js :

const request = require('request-promise');

async function getMetaData(attr) {
  const url = `http://metadata.google.internal/computeMetadata/v1/project/attributes/${attr}`;
  const options = {
    headers: {
      'Metadata-Flavor': 'Google'
    }
  };
  return request(url, options)
    .then(response => {
      console.info(`Retrieve meta data successfully. meta data: ${response.body}`);
      return response.body;
    })
    .catch(err => {
      console.error('Retrieve meta data failed.', err);
    });
}

async function retrieveMetaData() {
  return {
    IT_EBOOKS_API: await getMetaData('IT_EBOOKS_API')
  };
}

module.exports = { getMetaData, retrieveMetaData };

云函数 index.js :

const { retrieveMetaData } = require('./metadata');

async function retrieveComputeMetadata(req, res) {
  const envVars = await retrieveMetaData();
  console.log('envVars: ', envVars);
  res.status(200).json(envVars);
}

exports.retrieveComputeMetadata = retrieveComputeMetadata;

Retrieve meta data failed. { StatusCodeError: 404 - "404 page not found\n" at new StatusCodeError (/srv/node_modules/request-promise-core/lib/errors.js:32:15) at ....

看来 url 找不到。