How to use this module.
In the node definition, do something like this:

include varnish

varnish::backend{ 'be1':
  host            => 'my.backendhost.example.com',
  port            => '8080',
  probe_url       => '/probe.cgi',
  probe_timeout   => '50',
  probe_interval  => '1',
  probe_window    => '3',
  probe_threshold => '7',
}

varnish::director{ 'dir1':
  backends => [ 'be1', ],    # backends must be an array, even if there's just one
  policy   => 'round-robin', # policies are detailed here https://www.varnish-cache.org/docs/3.0/reference/vcl.html#directors
}


It is very important to have an default-director. This director will be used for every traffic, which is not explicit defined.

varnish::director{ 'default_director':
  backends => [ 'be0', ],    # backends must be an array, even if there's just one
  policy   => 'round-robin', # policies are detailed here https://www.varnish-cache.org/docs/3.0/reference/vcl.html#directors
}


class {'varnish::vhost':
  vhosts_data => { 
    'site1.domain' => 'director1', 
    'site2.domain' => 'director1',
    'site3.domain' => 'director2',
  }
}