Master Nginx: Essential Configuration Guide for High-Performance Servers

Nginx is a lightweight high‑performance HTTP and reverse‑proxy server widely used for load balancing, static file serving, and proxying.

Its configuration file is typically located at /etc/nginx/nginx.conf and follows a modular hierarchical structure.

Global Block

The global block defines global parameters such as worker processes, user, and log paths.

worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

Key directives:

worker_processes : number of worker processes, can be auto or set to CPU cores.

error_log : path and level of error logs.

pid : file storing the main process ID.

Events Block

The events block configures network connection parameters.

worker_connections 1024;

HTTP Block

The http block sets global HTTP service settings, including MIME types, logging, gzip compression, and timeouts.

http {
    include mime.types;
    default_type application/octet-stream;
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';
    sendfile on;
    keepalive_timeout 65;
    gzip on;
    ...
}

Server Block

The server block defines a virtual host and can contain multiple location blocks.

server {
    listen 80;
    server_name example.com www.example.com;

    location / {
        root /usr/share/nginx/html;
        index index.html index.htm;
    }
}

listen : port to listen on (e.g., 80 or 443).

server_name : defines server names, can be domains, IPs, or wildcards.

access_log : path for access logs.

Location blocks match request URLs with exact, prefix, or regex patterns, enabling fine‑grained routing.