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Big Mazzy
Big Mazzy

Posted on • Originally published at serverrental.store

How to Host Multiple Websites on a Single VPS

#webdev #cloud #linux #devops

Are you looking to maximize your budget and server resources by hosting multiple websites on one Virtual Private Server (VPS)? This guide will walk you through the essential steps and considerations to set up your VPS for efficient multi-website hosting. You'll learn how to configure your server to serve different domains from a single IP address, making it a cost-effective solution for developers and small businesses.

Understanding the Foundation: What is a VPS?

Before we dive into hosting multiple sites, let's clarify what a Virtual Private Server (VPS) is. Think of a physical server as a large building. A VPS is like renting out an entire apartment within that building. You get your own dedicated space with guaranteed resources (CPU, RAM, storage), but you share the underlying physical hardware with other tenants. This offers more control and performance than shared hosting, where you're just a room in a shared house.

A VPS provides you with root access, meaning you have administrative control over your server environment. This level of access is crucial for installing and configuring the software needed to host multiple websites.

Why Host Multiple Websites on a Single VPS?

The primary driver for hosting multiple websites on one VPS is cost-efficiency. Instead of paying for several separate hosting plans, you consolidate your needs onto a single, more powerful server. This can significantly reduce your monthly hosting expenses.

Beyond cost, a single VPS can offer simplified management. Imagine having one control panel or one server to update and monitor, rather than juggling multiple accounts. This can save valuable time and reduce the potential for errors.

Finally, it allows for resource consolidation. If one website experiences a surge in traffic, the VPS can often handle it better than a resource-limited shared hosting plan. You also have the flexibility to allocate resources as needed across your hosted sites.

Essential Software for Multi-Website Hosting

To host multiple websites, your VPS will need a few key pieces of software. We'll focus on the most common and robust combination: the LAMP stack.

  • Linux: The operating system. Most VPS providers offer various Linux distributions like Ubuntu, CentOS, or Debian. We'll assume you're using a popular choice like Ubuntu.
  • Apache or Nginx: The web server. This software is responsible for receiving requests from visitors' browsers and sending back the website's content. Nginx is often favored for its performance and efficiency, especially with static content and high traffic. Apache is also very capable and widely used. For this guide, we'll use Nginx as it's a popular choice for modern VPS setups.
  • MySQL/MariaDB: The database server. Websites often store data like user information, blog posts, or product details in a database. MySQL and its fork, MariaDB, are popular choices.
  • PHP: The server-side scripting language. PHP is used to create dynamic web pages, interact with databases, and process user input.

You'll also need a way to manage these services and configure your web server to direct traffic to the correct website. This is where virtual hosts (or server blocks in Nginx terminology) come into play.

Setting Up Your VPS: A Step-by-Step Approach

This section assumes you have a fresh VPS instance running a Linux distribution like Ubuntu. You should have SSH access to your server.

1. Update Your System

The first and most crucial step is to ensure your server's software packages are up to date. This helps patch security vulnerabilities and ensures you have the latest features.

sudo apt update && sudo apt upgrade -y
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This command first updates the list of available packages and their versions (apt update) and then installs any available upgrades (apt upgrade). The -y flag automatically answers "yes" to any prompts.

2. Install the Nginx Web Server

Nginx is a high-performance web server. You can install it with a simple command:

sudo apt install nginx -y
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Once installed, you can check its status:

sudo systemctl status nginx
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You should see output indicating that Nginx is active and running. You can also test it by visiting your VPS's IP address in a web browser. You should see the default Nginx welcome page.

3. Install a Database Server (MariaDB)

For this example, we'll install MariaDB, a popular open-source relational database management system.

sudo apt install mariadb-server -y
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After installation, it's a good practice to run the security script:

sudo mysql_secure_installation
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This script will guide you through setting a root password for the database, removing anonymous users, disallowing root login remotely, and removing the test database.

4. Install PHP

PHP is essential for dynamic websites. We'll install PHP and a few common extensions that are often needed.

sudo apt install php-fpm php-mysql php-mbstring php-xml php-curl -y
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  • php-fpm: FastCGI Process Manager, which is how Nginx communicates with PHP.
  • php-mysql: Allows PHP to connect to MySQL/MariaDB databases.
  • php-mbstring: Handles multi-byte strings, crucial for internationalization.
  • php-xml: For working with XML data.
  • php-curl: For making HTTP requests from PHP.

You can check your installed PHP version with:

php -v
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5. Configure Nginx for Multiple Websites (Server Blocks)

This is where the magic of hosting multiple sites on one VPS happens. Nginx uses server blocks (similar to Apache's virtual hosts) to manage different domains on the same IP address. Each server block defines how Nginx should handle requests for a specific domain.

Let's say you want to host website1.com and website2.com.

5.1. Create Website Directories

First, create directories to store the files for each website.

sudo mkdir -p /var/www/website1.com/public_html
sudo mkdir -p /var/www/website2.com/public_html
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5.2. Set Permissions

Grant ownership of these directories to your regular user (replace your_user with your actual username) and set appropriate permissions.

sudo chown -R your_user:www-data /var/www/website1.com
sudo chown -R your_user:www-data /var/www/website2.com
sudo chmod -R 755 /var/www/website1.com
sudo chmod -R 755 /var/www/website2.com
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5.3. Create Sample Index Files

Create a simple index.html file for each website to test the configuration.

For website1.com:

sudo nano /var/www/website1.com/public_html/index.html
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Add the following content:

<!DOCTYPE html>
<html>
<head>
    <title>Welcome to website1.com!</title>
</head>
<body>
    <h1>Success! The website1.com server block is working!</h1>
</body>
</html>
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Save and exit (Ctrl+X, Y, Enter).

For website2.com:

sudo nano /var/www/website2.com/public_html/index.html
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Add the following content:

<!DOCTYPE html>
<html>
<head>
    <title>Welcome to website2.com!</title>
</head>
<body>
    <h1>Success! The website2.com server block is working!</h1>
</body>
</html>
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Save and exit.

5.4. Create Nginx Server Block Configuration Files

Now, create a separate configuration file for each website within Nginx's sites-available directory.

For website1.com:

sudo nano /etc/nginx/sites-available/website1.com
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Paste the following configuration, adjusting server_name and root as needed:

server {
    listen 80;
    listen [::]:80;

    server_name website1.com www.website1.com;

    root /var/www/website1.com/public_html;
    index index.html index.htm index.nginx-debian.html;

    location / {
        try_files $uri $uri/ =404;
    }

    # Pass PHP scripts to FastCGI server
    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php8.1-fpm.sock; # Adjust PHP version if necessary
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;
    }

    # Deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    location ~ /\.ht {
        deny all;
    }
}
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Save and exit.

For website2.com:

sudo nano /etc/nginx/sites-available/website2.com
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Paste a similar configuration, changing server_name and root:

server {
    listen 80;
    listen [::]:80;

    server_name website2.com www.website2.com;

    root /var/www/website2.com/public_html;
    index index.html index.htm index.nginx-debian.html;

    location / {
        try_files $uri $uri/ =404;
    }

    # Pass PHP scripts to FastCGI server
    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php8.1-fpm.sock; # Adjust PHP version if necessary
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;
    }

    # Deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    location ~ /\.ht {
        deny all;
    }
}
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Save and exit.

Important Note: The fastcgi_pass line might need to be adjusted based on your installed PHP version. You can find the correct socket path by looking in /run/php/.

5.5. Enable the Server Blocks

To activate these configurations, you need to create symbolic links from sites-available to sites-enabled.

sudo ln -s /etc/nginx/sites-available/website1.com /etc/nginx/sites-enabled/
sudo ln -s /etc/nginx/sites-available/website2.com /etc/nginx/sites-enabled/
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5.6. Test Nginx Configuration and Reload

Before reloading Nginx, it's vital to test your configuration for syntax errors.

sudo nginx -t
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If the test is successful, you'll see messages like:

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
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If there are errors, the output will tell you where to look. Once the test passes, reload Nginx to apply the changes:

sudo systemctl reload nginx
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6. Configure DNS Records

For your websites to be accessible on the internet, you need to configure the DNS (Domain Name System) records for website1.com and website2.com. You'll need to point the A records for both website1.com and www.website1.com to your VPS's IP address. Do the same for website2.com. This is typically done through your domain registrar's control panel.

7. Setting Up SSL/TLS Certificates (HTTPS)

Securing your websites with HTTPS is no longer optional. We'll use Let's Encrypt and Certbot to easily obtain and install free SSL/TLS certificates.

First, install Certbot:

sudo apt install certbot python3-certbot-nginx -y
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Now, request certificates for your domains. Certbot will automatically modify your Nginx configuration files.

sudo certbot --nginx -d website1.com -d www.website1.com -d website2.com -d www.website2.com
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Follow the prompts. Certbot will ask if you want to redirect HTTP traffic to HTTPS. It's generally recommended to choose the redirect option.

Certbot will also set up automatic renewal for your certificates. You can test the renewal process with:

sudo certbot renew --dry-run
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After this step, your websites should be accessible via HTTPS.

8. Managing Databases for Each Website

Each website will likely need its own database. You can create them using the MariaDB command line.

Log in to MariaDB:

sudo mysql -u root -p
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Enter the root password you set during mysql_secure_installation.

Create a database and user for website1.com:


sql
CREATE DATABASE website1_db;
CREATE USER 'website1_user'@'localhost' IDENTIFIED BY 'your_strong_
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