add-node

#!/bin/bash
#
# Add a new site with support for Node.js

# Ensure running as root
if [ "$(id -u)" -ne 0 ]; then
    echo 'This script is designed to run as root'
    exit
fi

# Check arguments
if [ $# -lt 3 ]; then
    echo 'Syntax: add-node <site-name> <domain> <local-port>'
    exit
fi

# Include common functions
source "${0%/*}/common"

# Determine site information
SITENAME=$1
SITEDOMAIN=$2
LOCALPORT=$3

# Check number of dots in domain and use if we should add a www subdomain
DOTCOUNT=$(awk -F. '{print NF-1}' <<<"$SITEDOMAIN")
SERVERNAME=$SITEDOMAIN
if [ $DOTCOUNT -le 1 ]; then
    SERVERNAME="$SERVERNAME www.$SITEDOMAIN"
fi

# Determine site directory and user
DESTDIR=/var/www/$SITENAME
SITE_USER='www-data'
SITE_GROUP='www-data'
SERVICE_PATH='/etc/systemd/system/kestrel-$SITENAME.service'

# Create destination directories
sub_dirs=(public logs)
for subdir in "${sub_dirs[@]}"; do
    if [ ! -d "$DESTDIR/$subdir" ]; then
        mkdir -p "$DESTDIR/$subdir"
    fi
done

# Create nginx configuration
# Rename any existing file before creating the new one
if [ -f /etc/nginx/sites-available/$SITENAME.conf ]; then
    mv /etc/nginx/sites-available/$SITENAME.conf /etc/nginx/sites-available/$SITENAME.conf.old
fi
tee /etc/nginx/sites-available/$SITENAME.conf > /dev/null << EOF
server {
    listen 80;
    server_name $SERVERNAME;
    access_log $DESTDIR/logs/access.log;
    error_log $DESTDIR/logs/error.log;
    root $DESTDIR/public;
    index index.html;

    location /.well-known {
        default_type "text/plain";
        allow all;
    }

    location / {
        proxy_pass         http://localhost:$LOCALPORT;
        proxy_http_version 1.1;
        proxy_set_header   Upgrade \$http_upgrade;
        proxy_set_header   Connection 'upgrade';
        proxy_set_header   Host \$host;
        proxy_cache_bypass \$http_upgrade;
    }
}
EOF
ln -sf /etc/nginx/sites-available/$SITENAME.conf /etc/nginx/sites-enabled/$SITENAME.conf

# Set permissions for configuration file
chmod 0660 /etc/nginx/sites-available/$1.conf

# Copy template files and set permissions on site content
cp -R "$(dirname $0)/templates/node/." "$DESTDIR"
set_site_permissions $DESTDIR $SITE_USER $SITE_GROUP

# Check that nginx is happy with configuration
nginx -t
if [ $? -ne 0 ]; then
    echo 'Nginx reported error in configuration'
    exit
fi
nginx -s reload

# Configure PM2 to run the process
pm2 start $DESTDIR/app.js --name $SITENAME

# Create Letsencrypt certificate
create_certificate $SITENAME $SITEDOMAIN $DOTCOUNT

echo "Created node site $SITENAME successfully at $DESTDIR"