Web Cache Web Server Configuration - Plesk Multi-Site/Shared Hosting

This guide assumes that you have command-line access to the Plesk Server in question. If you do not have command-line access, please refer to Plesk's documentation on editing Apache configuration files through the Plesk GUI.

Create a file named “lscache.conf” with the following content in directory /etc/httpd/conf.d/ for CentOS and /etc/apache2/conf.d/ for Debian/Ubuntu:

<IfModule Litespeed>
  CacheRoot /var/www/vhosts/lscache/
</IfModule>

Note: It is recommended to set the server level Cache Root to /var/www/vhosts/lscache/ or a disk partition with enough space.

Create the /usr/local/psa/admin/conf/templates/custom/domain directory if it does not already exist. Copy domainVirtualHost.php to this location and view it's contents.

cd /usr/local/psa/admin/conf/templates/
mkdir -p custom/domain
cp default/domain/domainVirtualHost.php custom/domain/.

vi /usr/local/psa/admin/conf/templates/custom/domain/domainVirtualHost.php 

Add the following content to the proper location (we recommend inserting after the mod_suexec.c block):

   
<IfModule LiteSpeed>
  CacheRoot lscache
</IfModule>

This is to set cache directory for each vhost in their home directory (such as /var/www/vhosts/<domain_name>/lscache):

Reconfigure all virtual hosts ( this will regenerate new configuration files for all vhosts )

/usr/local/psa/admin/bin/httpdmng --reconfigure-all

For more information on this, please refer to Plesk's documentation on Changing Virtual Hosts Settings Using Configuration Templates.

If it does not already exist, create a file named “vhost.conf” ( or “vhost_ssl.conf” for HTTPS sites) with the following content in directory /var/www/vhosts/system/<domain_name>/conf/:

<IfModule Litespeed>
  CacheRoot lscache
</IfModule>

This is to set cache directory for this vhost in its home directory (such as /var/www/vhosts/<domain_name>/lscache) .

Reconfigure this Virtual Host ( this will regenerate new configuration files for this vhost )

/usr/local/psa/admin/bin/httpdmng --reconfigure-domain <domain_name>

After applying above cache storage settings, perform a graceful restart of LiteSpeed web server to have these changes take effect. LiteSpeed web server will automatically create the cache root directory with proper permission. User doesn't need to manually create any cache root directory.

service lsws restart

LiteSpeed Cache default settings work well with most caching scenarios. For shared hosting environment, please don't change any of the Server Level default cache policy settings and leave them as “Not Set”.

Cache Policy:
Enable Public Cache:Not Set
Check Public Cache:Not Set
Max Object Size:Not Set
Cache Expire Time (seconds):Not Set
Cache Stale Age (seconds)Not Set
Cache Request with Query String:Not Set
Cache Request with Cookie:Not Set
Cache Response with Cookie:Not Set
Ignore Request Cache-Control:Not Set
Ignore Response Cache-Control:Not Set
Enable Private Cache:Not Set
Check Private Cache:Not Set
Private Cache Expire Time (seconds):Not Set

Add the following Apache style configuration directive in your application level .htaccess file to enable cache lookup.

<IfModule LiteSpeed>
   CacheLookup public on
</IfModule>

For Advanced Cache Configuration info, look here.