Project ID required even if running script from Compute Engine

var datastore = require('@google-cloud/datastore')();

The line above used on compute engine (not app engine) will still throw the error below -

[Error: Sorry, we cannot connect to Google Cloud Services without a project ID. You may specify one with an environment variable named "GCL
OUD_PROJECT". See https://googlecloudplatform.github.io/google-cloud-node/#//docs/guides/authentication for a detailed guide on creating an
 authenticated connection.]

Yet in the documentation it says -

If you are running your app on Google Compute Engine, you won’t need to worry about supplying connection configuration options to @google-cloud/datastore— we figure that out for you.

That is not the case.

To reproduce create a google Compute engine instance and run a node.js script without a supplied project ID it will fail.

[dan-petty]

Getting this with 0.48.0 on App Engine nodejs runtime. var gcloud = require('google-cloud')({ projectId: 'my-project-id-here', keyFilename: './keyfile.json' });

Log error when trying to access gcs bucket:

“Error: Sorry, we cannot connect to Cloud Services without a project ID. You may specify one with an environment variable named “GCLOUD_PROJECT”. See https://googlecloudplatform.github.io/google-cloud-node/#/docs/guides/authentication for a detailed guide on creating an authenticated connection.”

EDIT: Reverting to:

`"gcloud": "^0.37.2"`

resolves issue with no changes to code.

EDIT 2: Also resolved by:

var storage = require('@google-cloud/storage');
var gcs = storage({
  projectId: 'my-project-id-here',
  keyFilename: './keyfile.json'
});

[bjwatson]

@stephenplusplus Is this a release blocking issue? It looks like several users have encountered it.