Google Cloud Functions

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Prerequisites

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

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Database Setup

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Counter Function Setup & Deploy

1. Go to Cloud Run in Google Cloud Console.
2. Click Write a function.
3. Enter a service name, pick a region, and select a recent Node.js runtime.

4. Under Authentication, select Allow public access.
5. Expand the Containers, Volumes, Networking, Security section. In the Variables & Secrets tab, add the UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN environment variables with the values from your database.

6. Click Create. The console creates the service and opens the inline source editor.
7. Set Function entry point to counter.

8. 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);
});

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

{
  "dependencies": {
    "@google-cloud/functions-framework": "^5.0.0",
    "@upstash/redis": "^1.38.0"
  }
}

10. Click Save and redeploy.
11. Visit the URL shown at the top of the service page.