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jholhewresjholhewres/devclaw-skills/skills/nginx/SKILL.md

nginx

Skill4 starsChanged 9 months agoMITView on GitHub

Nginx configuration, reverse proxy, and SSL

  • Installs packages

We split this skill into the rules it gives an agent

2 rules. 0 are common, 0 are distinctive, and 2 are very specific to this project.

  • 0

    Common

    Most of the 9 edited versions we read keep these.

  • 0

    Distinctive

    This author's own choices. Worth a look.

  • 2

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    Always: run nginx -t before reload/restart

    line 117
  2. Very specific:

    Use sites-available + symlink to sites-enabled

    line 118

“Common” is measured: kept by at least 6 in 10 of the 9 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Nginx

Nginx management: configuration, reverse proxy, SSL.

Setup

# Check if installed
command -v nginx

# Install — macOS
brew install nginx

# Install — Ubuntu/Debian
sudo apt install nginx

Basic Commands

# Test configuration (ALWAYS before reload)
sudo nginx -t

# Reload (applies config without downtime)
sudo systemctl reload nginx

# Restart
sudo systemctl restart nginx

# Status
systemctl status nginx

# Version and modules
nginx -V

Logs

# Access log
sudo tail -f /var/log/nginx/access.log
sudo tail -100 /var/log/nginx/access.log

# Error log
sudo tail -f /var/log/nginx/error.log

# Logs for a specific site (if configured)
sudo tail -f /var/log/nginx/<site>-access.log

Site Configuration

# List sites
ls /etc/nginx/sites-available/
ls /etc/nginx/sites-enabled/

# Enable site
sudo ln -s /etc/nginx/sites-available/<site> /etc/nginx/sites-enabled/
sudo nginx -t && sudo systemctl reload nginx

# Disable site
sudo rm /etc/nginx/sites-enabled/<site>
sudo nginx -t && sudo systemctl reload nginx

Reverse Proxy (template)

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://localhost:3000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

SSL with Certbot

# Install certbot
sudo apt install certbot python3-certbot-nginx

# Get certificate (modifies nginx config automatically)
sudo certbot --nginx -d example.com

# Renew
sudo certbot renew --dry-run
sudo certbot renew

WebSocket Proxy

location /ws {
    proxy_pass http://localhost:8080;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header Host $host;
}

Tips

  • Always run nginx -t before reload/restart
  • Use sites-available + symlink to sites-enabled
  • For debug: error_log /var/log/nginx/debug.log debug;
  • Rate limiting: limit_req_zone in the http section
  • Gzip: enable in /etc/nginx/nginx.conf for performance

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