here we go

templates/etc_default_varnish.erb

@@ -45,14 +45,13 @@ MEMLOCK=82000
 # one content server selected by the vcl file, based on the request.  Use a 1GB
 # fixed-size cache file.
 #
-DAEMON_OPTS="-a :80 \
+DAEMON_OPTS="-a :<%= @listen_port %> \
              -T localhost:6082 \
              -f /etc/varnish/default.vcl \
              -S /etc/varnish/secret \
-             -s malloc,1500m \
-         -p thread_pool_min=500 -p thread_pool_max=2048 \
-         -p session_max=10000"
-        
+             -s <%= @cache %> \
+             -p thread_pool_min=500 -p thread_pool_max=2048 \
+             -p session_max=10000"
          #-s file,/var/lib/varnish/$INSTANCE/varnish_storage.bin,1G"
 
 ## Alternative 3, Advanced configuration