Custom Load Balancing With Cloudflare Workers
The following is a guest post by Jayaprabhakar Kadarkarai, Developer of Codiva.io, an Online IDE used by computer science students across the world. He works full stack to deliver low latency and scalable web applications.
Have you launched your website? Getting a lot of traffic? And you are planning to add more servers? You’ll need load balancing to maintain the scalability and reliability of your website. Cloudflare offers powerful Load Balancing, but there are situations where off-the-shelf options can’t satisfy your specific needs. For those situations, you can write your own Cloudflare Worker.
In this post, we’ll learn about load balancers and how to set them up at a low cost with Cloudflare Service Workers.
This post assumes you have a basic understanding of JavaScript, as that’s the language used to write a Cloudflare Worker.
The Basic Pattern
The basic pattern starts with adding ‘fetch’ event listener to intercept the requests. You can configure which requests to intercept on the Cloudflare dashboard or using the Cloudflare API.
Then, modify the hostname of the URL and send the request to the new host.
addEventListener('fetch', event => {
var url = new URL(event.request.url);
// https://example.com/path/ Continue reading
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