VirtualHost redirect loop after applying SSL from COMODO - html

Question

After I applied the configuration it loops until I get an "ERR_TOO_MANY_REDIRECTS"
This is my VirtualHost configuration:
NameVirtualHost *
<VirtualHost *:80>
ServerName my-domain.com
ServerAlias my-site.my-domain.com
DocumentRoot /var/www/my-site
ErrorLog /home/my-site/logs/my-site/error.log
CustomLog /home/my-site/logs/my-site/access.log combined
Redirect permanent / https://my-site.my-domain.com/
</VirtualHost>
<VirtualHost *:443>
ServerAdmin admin#my-domain.com
ServerName my-domain.com
ServerAlias my-site.my-domain.com
DirectoryIndex index.php
DocumentRoot /var/www/my-site
ErrorLog /home/my-site/logs/my-site/ssl/error.log
CustomLog /home/my-site/logs/my-site/ssl/access.log combined
SSLEngine on
SSLCertificateFile /home/my-site/SSL/site_com_ar.crt
SSLCertificateKeyFile /home/my-site/SSL/HSSL-5dceb81ff3d10.key
SSLCertificateChainFile /home/my-site/SSL/USERTrustRSAAddTrustCA.crt
</VirtualHost>
How can I track down this issue?

Answer 1

I've solved it just in case anyone needs it:
i've added or modified a ".htaccess" file in each subdomain's root directory with the following:
First be sure you've got "mod_rewrite" enabled:
sudo a2enmod rewrite
Then reset apache:
sudo systemctl restart apache2
Now create or modify (in case it already exists) ".htaccess" in your subdomain root directory:
<IfModule mod_rewrite.c>
RewriteEngine On
# Redirect to HTTPS
RewriteCond %{HTTP:X-Forwarded-Proto} !https
RewriteCond %{HTTPS} off
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301,NE]
</IfModule>
Hope this helps you too!