Automate Nginx Domain configuration for VPS server to simplify the work... 🚀

setupdomain.sh

#!/bin/bash

# Exit on error
set -e

# Check if user provided domain and port
if [ $# -ne 2 ]; then
    echo "Usage: $0 <domain> <local_port>"
    exit 1
fi

DOMAIN=$1
LOCAL_PORT=$2
NGINX_CONF="/etc/nginx/sites-available/$DOMAIN"

echo "🛠 Setting up domain: $DOMAIN to forward traffic to localhost:$LOCAL_PORT with SSL..."

# Install Nginx and Certbot if not installed
if ! command -v nginx &> /dev/null; then
    echo "🔹 Installing Nginx..."
    sudo apt update
    sudo apt install -y nginx
fi

if ! command -v certbot &> /dev/null; then
    echo "🔹 Installing Certbot..."
    sudo apt install -y certbot python3-certbot-nginx
fi

# Create Nginx config
echo "🔹 Creating Nginx config for $DOMAIN..."

sudo tee "$NGINX_CONF" > /dev/null <<EOF
server {
    listen 80;
    server_name $DOMAIN www.$DOMAIN;

    location / {
        proxy_pass http://127.0.0.1:$LOCAL_PORT;
        proxy_http_version 1.1;
        proxy_set_header Upgrade \$http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host \$host;
        proxy_cache_bypass \$http_upgrade;
    }
}

server {
    listen 443 ssl;
    server_name $DOMAIN www.$DOMAIN;

    ssl_certificate /etc/letsencrypt/live/$DOMAIN/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/$DOMAIN/privkey.pem;

    location / {
        proxy_pass http://127.0.0.1:$LOCAL_PORT;
        proxy_http_version 1.1;
        proxy_set_header Upgrade \$http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host \$host;
        proxy_cache_bypass \$http_upgrade;
    }
}
EOF

# Enable Nginx config
echo "🔹 Enabling site configuration..."
sudo ln -sf "$NGINX_CONF" /etc/nginx/sites-enabled/

# Restart Nginx
echo "🔹 Restarting Nginx..."
sudo systemctl restart nginx

# Obtain SSL certificate
echo "🔹 Requesting SSL certificate from Let's Encrypt..."
sudo certbot --nginx -d "$DOMAIN" -d "www.$DOMAIN" --non-interactive --agree-tos -m "admin@$DOMAIN"

# Enable automatic renewal
echo "🔹 Setting up automatic SSL renewal..."
sudo systemctl enable certbot.timer
sudo systemctl start certbot.timer

# Final restart to apply SSL
echo "🔹 Restarting Nginx..."
sudo systemctl restart nginx

echo "✅ Setup complete! Your domain https://$DOMAIN is now forwarding to localhost:$LOCAL_PORT."

Automate Nginx Domain configuration for VPS server to simplify the work...

🚀 How to Use
1️⃣ Save the script as setupdomain.sh

nano setupdomain.sh

Paste the script, then save & exit (CTRL + X, then Y, then ENTER).

2️⃣ Give it execute permissions

chmod +x setupdomain.sh

3️⃣ Run the script with your domain and port

./setupdomain.sh mydomain.com 9090

🎯 What This Does
✔ Installs Nginx & Certbot if missing.
✔ Configures Nginx reverse proxy for the domain.
✔ Requests & installs a free SSL certificate.
✔ Enables auto-renewal for SSL.
✔ Restarts Nginx to apply changes.