Drupal multi-site in an add-on domain?

Question

How can I configure Drupal 8 with multi-site under an add-on domain using cPanel? I'm getting a 404 when I browse to my subdomain after following these steps:

1. Clean install of Drupal to my add-on domain: /public_html/addondomain.com/drupal. I can successfully browse to addondomain.com/drupal
2. In cPanel, create a sub-domain at sub.addondomain.com with a document root at /public_html/sub.addondomain.com
3. Create the directory /public_html/addondomain.com/drupal/sites/sub.addondomain.com
4. Create a sites.php within public_html/addondomain.com/drupal/sites that contains the following code: <?php $sites = array('sub.addondomain.com' => 'sub.addondomain.com',);>. File permissions are 644.
5. Copy /public_html/addondomain.com/drupal/sites/default/default.services.yml to /public_html/addondomain.com/drupal/sites/sub.addondomain.com/services.yml
6. Copy /public_html/addondomain.com/drupal/sites/default/default.settings.php to /public_html/addondomain.com/drupal/sites/sub.addondomain.com/settings.php
7. Remove the directory /public_html/sub.addondomain.com
8. Create a symbolic link in /public_html/: ln -s addondomain.com sub.addondomain.com

When I do all of the above, I get a 404 error when I browse to both sub.addondomain.com and sub.addondomain.com/drupal. Why am I not redirected to the Drupal installation page where I can enter in my database info, etc.? Is the error with my symlinks? My server (cPanel) configuration? My .htaccess under either my /public_html, public_html/addondomain.com, or /public_html/addondomain.com/drupal?

Answer 1

My solution was to point the document root of sub.addondomain.com to /public_html/addondomain.com/drupal. I did this within cPanel, which - if I understand cPanel correctly - is going to directly edit the Apache VirtualHosts directives within Apache's config files for my site (something I wouldn't have access to directly with shared hosting).

Answer 2

You say this,

• Drupal is installed under addondomain.com in /public_html/addondomain.com/drupal
• The document root for sub.addondomain.com is set to /public_html/sub.addondomain.com

If this is accurate, they're looking for files in different places. Make sure these two are setup the same (either with or without the drupal suffix).

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Create a sites.php within public_html/addondomain.com/drupal/sites that contains the following code: 'sub.addondomain.com',);>. File permissions are 644.

Move or remove this file. It's not needed with your naming scheme and it's simply adding another step to debug.

 * For example, for a fictitious site installed at
 * https://www.drupal.org:8080/mysite/test/, the 'settings.php' file is searched
 * for in the following directories:
 *
 * - sites/8080.www.drupal.org.mysite.test
 * - sites/www.drupal.org.mysite.test
 * - sites/drupal.org.mysite.test
 * - sites/org.mysite.test
 *
 * - sites/8080.www.drupal.org.mysite
 * - sites/www.drupal.org.mysite
 * - sites/drupal.org.mysite
 * - sites/org.mysite
 *
 * - sites/8080.www.drupal.org
 * - sites/www.drupal.org #THIS PATTERN WILL MATCH
 * - sites/drupal.org
 * - sites/org
 *
 * - sites/default

More info here, https://github.com/drupal/drupal/blob/17ebfff72673728bc8495d67f35061ad8bdcc299/sites/default/default.settings.php#L13

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> My .htaccess under either my /public_html, public_html/addondomain.com, or /public_html/addondomain.com/drupal?

Could you explain a bit more why you have .htaccess files under /public_html/addondomain.com and under /public_html/addondomain.com/drupal?

I think I get my last question (above crossed out, leaving for reference of others). You created a directory under addondomain.com for drupal, /drupal. Now you are trying to access it via a subdomain. If you want to access it without /drupal at the end you should update the symlink to ln -s addondomain.com/drupal sub.addondomain.com