Use the example configuration files in Open-ILS/examples/apache/ (for Apache versions below 2.4) or Open-ILS/examples/apache_24/ (for Apache versions 2.4 or greater) to configure your Web server for the Evergreen catalog, staff client, Web services, and administration interfaces. Issue the following commands as the root Linux account:

Debian Wheezy. 

cp Open-ILS/examples/apache/eg.conf       /etc/apache2/sites-available/
cp Open-ILS/examples/apache/eg_vhost.conf /etc/apache2/
cp Open-ILS/examples/apache/eg_startup    /etc/apache2/
# Now set up SSL
mkdir /etc/apache2/ssl
cd /etc/apache2/ssl

Ubuntu Trusty/Xenial and Debian Jessie/Stretch. 

cp Open-ILS/examples/apache_24/eg_24.conf       /etc/apache2/sites-available/eg.conf
cp Open-ILS/examples/apache_24/eg_vhost_24.conf /etc/apache2/eg_vhost.conf
cp Open-ILS/examples/apache/eg_startup          /etc/apache2/
# Now set up SSL
mkdir /etc/apache2/ssl
cd /etc/apache2/ssl

The openssl command cuts a new SSL key for your Apache server. For a production server, you should purchase a signed SSL certificate, but you can just use a self-signed certificate and accept the warnings in the staff client and browser during testing and development. Create an SSL key for the Apache server by issuing the following command as the root Linux account:

openssl req -new -x509 -days 365 -nodes -out server.crt -keyout server.key

As the root Linux account, edit the eg.conf file that you copied into place.

Change the user for the Apache server.

As the root Linux account, configure Apache with KeepAlive settings appropriate for Evergreen. Higher values can improve the performance of a single client by allowing multiple requests to be sent over the same TCP connection, but increase the risk of using up all available Apache child processes and memory.

As the root Linux account, configure the prefork module to start and keep enough Apache servers available to provide quick responses to clients without running out of memory. The following settings are a good starting point for a site that exposes the default Evergreen catalogue to the web:

Debian Wheezy (/etc/apache2/apache2.conf). 

<IfModule mpm_prefork_module>
   StartServers         15
   MinSpareServers       5
   MaxSpareServers      15
   MaxClients           75
   MaxRequestsPerChild 500
</IfModule>

Ubuntu Trusty/Xenial, Debian Jessie/Stretch (/etc/apache2/mods-available/mpm_prefork.conf). 

<IfModule mpm_prefork_module>
   StartServers            15
   MinSpareServers          5
   MaxSpareServers         15
   MaxRequestWorkers       75
   MaxConnectionsPerChild 500
</IfModule>

(Ubuntu Trusty/Xenial, Debian Jessie/Stretch) As the root user, enable the mpm_prefork module:

a2dismod mpm_event
a2enmod mpm_prefork

(Debian Wheezy): As the root Linux account, enable the Evergreen site:

a2dissite default  # OPTIONAL: disable the default site (the "It Works" page)
a2ensite eg.conf

(Ubuntu Trusty/Xenial, Debian Jessie/Stretch):

a2dissite 000-default  # OPTIONAL: disable the default site (the "It Works" page)
a2ensite eg.conf

(Debian and Ubuntu): As the root Linux account, enable Apache to write to the lock directory; this is currently necessary because Apache is running as the opensrf user:

chown opensrf /var/lock/apache2