Judoscale for Fastify

Official Judoscale adapter package for Fastify applications.

Set up your Fastify app for autoscaling

1. Install the judoscale-fastify package:

npm install judoscale-fastify --save

2. Import and use the provided plugin:

Judoscale should be one of the first plugins for your app.

// ESM
import { Judoscale, plugin as judoscalePlugin } from 'judoscale-fastify'

// CommonJS
const { Judoscale, plugin: judoscalePlugin } = require('judoscale-fastify')

// Initialize Judoscale with default configuration
const judoscale = new Judoscale()

// Register the plugin
fastify.register(judoscalePlugin, judoscale)

Troubleshooting

Once installed, you should see something like this in your development log:

[Judoscale] Reporter not started: JUDOSCALE_URL is not set

In your production app where you've installed Judoscale, you should see this in your logs:

[Judoscale] Reporter starting, will report every 10 seconds

If you don't see either of these, ensure "judoscale-express" is in your Package.lock file, and restart your app.

You can see more detailed (debug) logging by setting the environment variable JUDOSCALE_LOG_LEVEL=debug on your deployed application. Here's how you would do that on Heroku:

heroku config:set JUDOSCALE_LOG_LEVEL=debug

Reach out to [email protected] if you run into any other problems.