To enable autoscaling for your application through a standalone monitoring script:

1. Integrate the provided acquia-autoscaling.js file into your project.

   This script collects and exposes the performance metrics necessary for auto-scaling decisions.

2. Place the acquia-autoscaling.js file in the root of your project directory.

3. Modify the start command of your package.json to include the acquia-autoscaling.js file.

4. Install the prom-client dependency in the package.json with the following command:
 

npm install prom-client

For example, if your original start command was node server.js, change it to:

"start": "NODE_OPTIONS='-r ./acquia-autoscaling.js' node server.js"

For example, if your original start command was next start, change it to:

"start": "NODE_OPTIONS='-r ./acquia-autoscaling.js' next start"

This ensures that the monitoring script runs before your application starts. It makesthe metrics available and enables us to scale your application based on these metrics.

Place NODE_OPTIONS='-r ./acquia-autoscaling.js' immediately before the main entry point command of the Node.js application as shown in the preceding example. Placing it elsewhere in the startup command does not enable autoscaling.

Note: Autoscaling is not enabled if the monitoring script is not configured