Nginx Load Balancing - Comprehensive Guide

Full Guide to Load Balancing with Nginx

Nginx is a powerful web server and reverse proxy that can also perform load balancing functions. This guide covers various load balancing methods and their configuration.

Round Robin (Default)

Nginx’s default round robin algorithm distributes requests sequentially across the backend servers.

This is a simple method, suitable for applications where session affinity isn't critical and consistent distribution is desired.

IP Hash (for Session Affinity)

The IP hash algorithm directs requests from the same client to the same backend server.

This ensures that user sessions remain associated with the same server, which is vital for applications relying on session data.

Health Checks and Failover

Nginx supports health checks to monitor the status of backend servers.

If a server fails a health check, Nginx automatically redirects traffic to available healthy servers, ensuring high availability.

Frequently asked questions