GCP · Serverless

Cloud Functions

Event-driven serverless functions.

Overview

Cloud Functions (2nd gen, built on Cloud Run) runs single-purpose functions triggered by HTTP, Pub/Sub, Storage, Firestore or Eventarc.

When to use it

Webhooks (CI status, test result fan-out)
Lightweight ETL between QA datasources
Reacting to bucket uploads to parse reports

Setup

Enable Cloud Functions, Cloud Build and Eventarc APIs.
Write handler (Node/Python/Go/Java).
Deploy with `gcloud functions deploy` specifying trigger and runtime.

How to use

Deploy HTTP function

gcloud functions deploy parse-report \
  --gen2 --runtime=nodejs20 \
  --trigger-http --entry-point=handler --region=us-central1

Trigger on bucket upload

gcloud functions deploy on-report \
  --gen2 --runtime=python311 \
  --trigger-event-filters="type=google.cloud.storage.object.v1.finalized" \
  --trigger-event-filters="bucket=qa-reports"

QA use cases

Parse uploaded JUnit XML and push metrics to BigQuery.
Slack notifier for failed test runs via Pub/Sub.