如何构建多区域 firebase 应用程序？

Question

Currently, I have this structure:

- A couple of functions in a single region
- A firestore database in a single region

A while ago, the whole region went down, which caused issues to the users.

I want to change the structure to be in multiple regions, both the database and the functions.

How is that done in the firebase world?

Keeping in mind that when I deploy the functions in multiple regions, there should be some way to route requests to the function in the region close to the user.

Answer 1

Once the database is created, the region can't be changed. You'll have to create a new project with the new region.

By default, functions run in the us-central1 region.If you have a function that is currently in the default functions region of us-central1, and you want to migrate it to asia-northeast1, you need to first modify your source code to rename the function and revise the region. You can refer to this document

// before
const functions = require('firebase-functions');

exports.webhook = functions
    .https.onRequest((req, res) => {
            res.send("Hello");
    });

// after
const functions = require('firebase-functions');

exports.webhookAsia = functions
    .region('asia-northeast1')
    .https.onRequest((req, res) => {
            res.send("Hello");
    });

Then deploy by running:

firebase deploy --only functions:newfunction 

After renaming the function with the new region, now there are two identical functions running in us-central1 and asia-northeast1.

You can also check this stackoverflow link1 & link2 which might help