+upstream tile_cache_backend {
+ server 127.0.0.1;
+ <% @caches.each do |cache| -%>
+ #Server <%= cache[:hostname] %>
+ <% cache.ipaddresses(:family => :inet, :role => :external).sort.each do |address| -%>
+ server <%= address %> backup;
+ <% end -%>
+ <% end -%>
+
+ keepalive 32;
+}
+