Tech Tips: Google Cloud Serverless VPC + Cloud Functions

Saturday, December 4, 2021

Google Cloud Serverless VPC + Cloud Functions

Summary

I'll show an example configuration of GCP Serverless VPC Access in this post. The scenario here will be a Cloud Function that needs to access Memorystore (GCP managed Redis). Memorystore is isolated in a VPC with a private range address - which is good as far as security is concerned. To access that VPC from Cloud Functions, a Serverless VPC connector needs to be built.

Architecture

Memorystore Configuration

Serverless VPC Configuration

Cloud Function Configuration

Cloud Function Redis Client Connection Code

const {createClient} = require('redis');

    getClient() {
        const client = createClient({
            socket: {
                host: process.env.REDIS_HOST
            },
            password: process.env.REDIS_PASS
        });
        client.on('error', (err) => { 
            throw Error(`redis client error: ${err}`);
        });
        return client;
    }