You will learn how how to create or add a subdomain on DigitalOcean servers.
Contents:
Prerequisites
You have read the following tutorial:
Example of the subdomain used in this tutorial: apps.example.com
Step 1: Create an ‘A’ record for the subdomain
- Go to your DNS settings page and open the records where you have main domain DNS settings.
- Now add an
Arecord with subdomain inEnter Namefield (only add subdomain part. For example if you are going to create a subdomainapps.example.comthen only enterappsand in the IP address field, enter the droplet IP.
Step 2: Create subdomain directory and index file
Create the subdomain and add the index file:
subdomain_dir=/var/www/apps.example.com
# Create directory
sudo mkdir $subdomain_dir
# Create index.html
sudo touch $subdomain_dir/index.htmlEdit the index file content as you want. The content looks like this:
<!DOCTYPE html>
<html>
<head>
<title>Welcome to Example Appstore!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to Example Appstore!</h1>
<p>This site is under active development.</p>
<h2>Related Websites</h2>
<a href = "https://www.datanovia.com">Datanovia</a><br/>
</body>
</html>Step 3: Create NGINX server block for the subdomain
This enables the subdomain in the NGINX server.
# 1. Copy the default config for the new subdomaine
mysubdomain="apps.example.com"
sudo cp /etc/nginx/sites-available/default /etc/nginx/sites-available/$mysubdomain
sudo ln -s /etc/nginx/sites-available/$mysubdomain /etc/nginx/sites-enabled/$mysubdomain
# 2. Open the config file
sudo nano /etc/nginx/sites-available/$mysubdomain
# 3. Edit the file
# The content should look something like this
server {
listen 80;
listen [::]:80;
root /var/www/apps;
index index.html;
server_name apps.example.com;
}
# 4. Restart NGINX
sudo service nginx restartStep 4: Add SSL certificate for security
# Obtain an SSL Certificate
sudo certbot --nginx -d $mysubdomainStep 5: Access to the subdomain
Go to: apps.example.com
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