Google Cloud Functions

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Prerequisites

1. Create a Google Cloud Project.
2. Enable billing for your project.
3. Enable Cloud Functions, Cloud Build, Artifact Registry, Cloud Run, Logging, and Pub/Sub APIs.

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Database Setup

Create a Redis database using Upstash Console or Upstash CLI. Copy UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN for the next steps.

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Counter Function Setup & Deploy

1. Go to Cloud Functions in Google Cloud Console.
2. Click Create Function.
3. Setup Basics and Trigger Configuration like below:
4. Using your UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN, setup Runtime environment variables under Runtime, build, connections and privacy settings like below.
5. Click Next.
6. Set Entry point to counter.
7. Update index.js

const { Redis } = require("@upstash/redis");
const functions = require('@google-cloud/functions-framework');

const redis = new Redis({
  url: process.env.UPSTASH_REDIS_REST_URL,
  token: process.env.UPSTASH_REDIS_REST_TOKEN
});

functions.http('counter', async (req, res) => {
  const count = await redis.incr("counter");
  res.send("Counter:" + count);
});

8. Update package.json to include @upstash/redis.

{
  "dependencies": {
    "@google-cloud/functions-framework": "^3.0.0",
    "@upstash/redis": "^1.31.6"
  }
}

9. Click Deploy.
10. Visit the given URL.