Nginx as a Load Balancer and Least-Privilege IAM: DevOps Day 16 Lessons

A DevOps learning challenge demonstrated how just ten lines of Nginx configuration can distribute traffic across multiple backend servers using round-robin load balancing, without relying on a managed cloud service. The setup relies on an upstream block and proxy_pass directive, with proxy headers ensuring backend servers receive the client's real IP rather than the load balancer's. On the AWS side, the exercise covered creating an IAM user, group, and a custom policy restricted to four specific EC2 read-only actions, illustrating the least-privilege principle. Both tasks were completed on the KodeKloud Engineer platform as part of a structured 100-day DevOps and cloud training program. The core takeaway was that understanding stripped-down, manually configured versions of common tools builds a stronger foundation than defaulting to broad permissions or fully managed abstractions.