Comprehensive Guide to Nginx Configuration, Architecture, and Advanced Features

This article serves as a detailed tutorial on Nginx, an open‑source, high‑performance web server and reverse proxy. It begins with an overview of Nginx's features, such as high concurrency, modular architecture, and hot deployment capabilities.

Installation : The guide shows how to install Nginx on CentOS 7 using the yum install nginx -y command and verifies the installation by checking the package files and directories.

Core Configuration : It explains the main configuration sections ( main , events , http ) and key directives like worker_processes , worker_connections , keepalive_timeout , and daemon . It also details how to set up static file serving with root and alias , and how to use location blocks with various matching modifiers (=, ~, ~*, ^~).

Reverse Proxy and Load Balancing : The article introduces the upstream and proxy_pass directives, demonstrating how to configure a reverse proxy, set up load‑balancing strategies (round‑robin, least connections, hash, ip_hash), and bind client IPs to specific upstream servers.

Caching : It covers proxy_cache , proxy_cache_path , cache keys, validity periods, and how to bypass caching for specific file types, providing a complete caching configuration example.

HTTPS and Security : The guide explains the HTTPS handshake process, shows how to configure SSL certificates, and provides a sample server block for HTTPS with recommended protocols and ciphers.

CORS and Gzip : It describes cross‑origin resource sharing, how to enable CORS via Nginx, and details gzip compression settings, including MIME types, compression level, and buffer sizes.

Architecture : The article outlines Nginx's multi‑process model, describing the master process and worker processes, how configuration reloads work (signal handling, graceful shutdown), and the modular design that allows easy extension.

Overall, the tutorial equips readers with the knowledge to install, configure, and optimize Nginx for static content delivery, reverse proxying, load balancing, caching, secure HTTPS, and performance tuning.