Add support for VPC connectors in functions.runWith

[pcboy]

Description

This PR adds support for vpcConnectors inside runWith.
Refers to #552 and my corresponding PR in firebase-tools: #2525

Code sample

functions
      .runWith({
        vpcConnector: 'test-connector',
        vpcConnectorEgressSettings: 'PRIVATE_RANGES_ONLY'
      })
      .auth.user()
      .onCreate((user) => user);

[mbleigh]

Thanks for writing this! One small change but overall looks good.

Note that the internal API review process needs to complete before we can merge / release this. I'll come back around when that's done.

[joshdifabio]

It looks like the Google Cloud console UI for editing cloud functions is currently broken for Firebase functions, which makes it impossible to assign a VPC connector to a Firebase function right now, so it'd be great to get this merged and avoid having to use that fragile UI forevermore.

[cubissimo]

If someone still stucked into this, i built a gcloud function (who works with gcloud console or gcloud cli to assign the vpc) to act like a "proxy" routing out egress traffic with a vpc connector.

And i call this proxy function from my firebase functions when need to use the vpc.

I know its very aweful but there no way to do this direct in firebase by now.

[laurenzlong]

I tried this out in conjunction with firebase/firebase-tools#2525 and it worked great!

[edyrkaj]

Hi,
Which are the available options for:
vpcConnectorEgressSettings => ('PRIVATE_RANGES_ONLY' | 'ALL_TRAFFIC') I am supposing this based on values of two radio buttons that exists on cloud function / edit / network.

Just found on your code changes. If someone is looking for that you can find here:
https://github.com/firebase/firebase-functions/pull/752/files#diff-ed71fa16fbb4c22460844cc3c67d7951389ce13ec815fe6a09d77ab6912585ffR50

Thnx