= Setting up Varnish for your Noosfero site

Varnish is a HTTP caching server, and using it together with Noosfero is highly
recommended. See http://www.varnish-cache.org/ for more information on Varnish.

Varnish can be set up to use with Noosfero with the following steps:

1) setup Noosfero with apache according to the INSTALL file. If you used the
Debian package to install noosfero, you don't need to do anything about this.

2) install Varnish

  # apt-get install varnish

Install the RPAF apache module (or skip this step if not using apache):

  # apt-get install libapache2-mod-rpaf

3) Change Apache to listen on port 8080 instead of 80

3a) Edit /etc/apache2/ports.conf, and:

  * change 'NameVirtualHost *:80' to 'NameVirtualHost *:8080'
  * change 'Listen 80' to 'Listen 127.0.0.1:8080'

3b) Edit /etc/apache2/sites-enabled/*, and change '<VirtualHost *:80>' to
'<VirtualHost *:8080>'

3c) Restart apache

  # invoke-rc.d apache2 restart

4) Varnish configuration

4a) Edit /etc/default/varnish

   * change the line that says "START=no" to say "START=yes"
   * change '-a :6081' to '-a :80'

4b) Edit /etc/varnish/default.vcl and add the following lines at the end:

  include "/etc/noosfero/varnish-noosfero.vcl";
  include "/etc/noosfero/varnish-accept-language.vcl";

On manual installations, change "/etc/noosfero/*" to
"{Rails.root}/etc/noosfero/*"

NOTE: it is very important that the *.vcl files are included in that order,
i.e. *first* include "varnish-noosfero.vcl", and *after*
"noosfero-accept-language.cvl".

4c) Restart Varnish

  # invoke-rc.d varnish restart

5) Enable varnish logging:

5a) Edit /etc/default/varnishncsa and uncomment the line that contains:

VARNISHNCSA_ENABLED=1

The varnish log will be written to /var/log/varnish/varnishncsa.log in an
apache-compatible format. You should change your statistics generation software
(e.g. awstats) to use that instead of apache logs.

5b) Restart Varnish Logging service

  # invoke-rc.d varnishncsa restart

Thanks to Cosimo Streppone for varnish-accept-language. See
http://github.com/cosimo/varnish-accept-language for more information.