serverless/docs/providers/google/guide/functions.md

Read this on the main serverless docs site

Google - Functions

If you are using Google Cloud Functions as a provider, all functions inside the service are Google Cloud Functions.

Configuration

All of the Google Cloud Functions in your serverless service can be found in serverless.yml under the functions property.

# serverless.yml
service: my-gcloud-service

provider:
  name: google

plugins:
  - serverless-google-cloudfunctions

functions:
  first:
    handler: http
    events:
      - http: path

The handler property points to the file (default filename: index.js) and module containing the code you want to run in your function.

// index.js
exports.http = (request, response) => {}

Note: The file which contains the handlers needs to have the name index.js.

You can add as many functions as you want within this property.

# serverless.yml
...

functions:
  functionOne:
    handler: http
  functionTwo:
    handler: http
  functionThree:
    handler: otherHandler

Memory size and timeout

The memorySize and timeout for the functions can be specified on the provider or function level. The provider wide definition causes all functions to share this config, whereas the function wide definition means that this configuration is only valid for the function.

The default memorySize is 256 and the default timeout is 60s if not specified.

# serverless.yml

provider:
  memorySize: 1024
  timeout: 90s

functions:
  first:
    handler: first
  second:
    handler: second
    memorySize: 512
    timeout: 120s

Handler signatures

Google Cloud Functions have different handler signatures dependent on the event type which will trigger them.

http events

exports.http = (request, response) => {
  response.status(200).send('Hello World!');
};

event events

exports.event = (event, callback) => {
  console.log('Hello World!');
  callback();
};