Master Nginx: 113‑Page Deep Dive from Beginner to Pro

Nginx is widely used in large‑scale websites, web applications, and mobile services for its high performance, high concurrency handling, and low memory consumption.

When deploying a site, Nginx is the preferred choice for medium to large projects or micro‑service architectures, while smaller projects may use IIS or Tomcat.

Architecture Overview

Nginx follows a multi‑process model consisting of a master process and multiple worker processes.

Master process reads and validates configuration files, manages socket connections, controls worker processes, handles commands such as restart or upgrade, enables graceful reloads, opens log files, and can roll back on failure.

Worker processes handle client requests, forward them to functional modules, perform I/O, communicate with backend servers, manage caching, and send responses back to clients.

Core Configuration

Virtual hosts are defined using the ngx_http_core_module, allowing different IPs, ports, or domain names to map to separate sites.

Location blocks are used to specify request handling, including file existence checks with try_files, which returns the first matching file or triggers an internal redirect if none are found.

Four‑Layer Access Control

Access control is implemented via ngx_http_access_module, restricting client access based on source IP addresses.

Reverse Proxy

Nginx acts as a reverse proxy, forwarding external client requests to internal web servers and returning the responses, a common pattern for load balancing and security.

Advanced Features

Advanced configuration sections cover HTTPS (HTTP + SSL/TLS) for encrypted transmission, and detailed reverse‑proxy setups.

Production Deployment

Typical production deployment includes a layered architecture with Nginx handling SSL termination, load balancing, and static content delivery, while backend services run behind it.