Load Balancer

An application load balancer(ALB) built using NodeJS.

Deployment

Start the app servers using

npm run server --port 8080
npm run server --port 8081
npm run server --port 8082

To start the load balancer

npm run start

• A health check for available app servers happens every 5 seconds.
• The load balancer is accessible by accessing localhost at port 80.
• When a node goes offline/online, the load balancer gets notified.
• Subsequent requests to localhost will fetch the response from either of the available servers.

Next steps

• Other load balancing algorithms instead of round robin.
• assigning weights to app servers depending on performance(response time/ server load handling capability). By doing this we will be sending more requests to particular app servers in the pool.