Alliance Auth gets served using a Web Server Gateway Interface (WSGI) script. This script passes web requests to Alliance Auth which generates the content to be displayed and returns it. This means very little has to be configured in Apache to host Alliance Auth.
If you’re using a small VPS to host services with very limited memory, consider using NGINX.
Ubuntu:
apt-get install apache2
CentOS:
yum install httpd
systemctl enable httpd
systemctl start httpd
Apache needs to be able to read the folder containing your auth project’s static files. On Ubuntu: chown -R www-data:www-data /var/www/myauth/static, and on CentOS: chown -R apache:apache /var/www/myauth/static
Apache serves sites through defined virtual hosts. These are located in /etc/apache2/sites-available/ on Ubuntu and /etc/httpd/conf.d/httpd.conf on CentOS.
A virtual host for auth need only proxy requests to your WSGI server (gunicorn if you followed the install guide) and serve static files. Examples can be found below. Create your config in its own file eg myauth.conf.
To proxy and modify headers a few mods need to be enabled.
a2enmod proxy
a2enmod proxy_http
a2enmod headers
Create a new config file for auth eg /etc/apache2/sites-available/myauth.conf and fill out the virtual host configuration. To enable your config use a2ensite myauth.conf and then reload apache with service apache2 reload.
Place your virtual host configuration in the appropriate section within /etc/httpd/conf.d/httpd.conf and restart the httpd service with systemctl restart httpd.
<VirtualHost *:80>
ServerName auth.example.com
ProxyPassMatch ^/static !
ProxyPass / http://127.0.0.1:8000/
ProxyPassReverse / http://127.0.0.1:8000/
ProxyPreserveHost On
Alias "/static" "/var/www/myauth/static"
<Directory "/var/www/myauth/static">
Require all granted
</Directory>
</VirtualHost>
It’s 2018 - there’s no reason to run a site without SSL. The EFF provides free, renewable SSL certificates with an automated installer. Visit their website for information.
After acquiring SSL the config file needs to be adjusted. Add the following lines inside the <VirtualHost> block:
RequestHeader set X-FORWARDED-PROTOCOL https
RequestHeader set X-FORWARDED-SSL On