anchor.diff:  # DO NOT EDIT - This file is being maintained by Chef
   
   upstream tile_cache_backend {
  -    server 127.0.0.1;
  +  server 127.0.0.1;
   
  -    # Add the other caches to relieve pressure if local squid failing
  -    # Balancer: round-robin
  +  # Add the other caches to relieve pressure if local squid failing
  +  # Balancer: round-robin
   <% @caches.each do |cache| -%>
   <% if cache[:hostname] != node[:hostname] -%>
  -    # Server <%= cache[:hostname] %>
   <% cache.ipaddresses(:family => :inet, :role => :external).sort.each do |address| -%>
  -    server <%= address %> backup;
  +  server <%= address %> backup; # Server <%= cache[:hostname] %>
   <% end -%>
   <% end -%>
   <% end -%>
   
  -    keepalive 256;
  +  keepalive 256;
  +}
  +
  +# Geo Map of tile caches
  +geo $tile_cache {
  +  default 0;
  +<% @caches.each do |cache| -%>
  +<% cache.ipaddresses(:family => :inet, :role => :external).sort.each do |address| -%>
  +  <%= address %> 1; # <%= cache[:hostname] %>
  +<% end -%>
  +<% end -%>
   }
   
   # Rates table based on current cookie value
  
positive.code: }
  
  map $http_user_agent $approved_scraper {
    default '';                       # Not approved
    '~^JOSM\/' 'JOSM';
    '~^Mozilla\/5\.0\ QGIS\/' 'QGIS';
  }
  
  map $http_user_agent $denied_scraper {
    default '';          # Not denied
    '~^Python\-urllib\/' 'Python';
    '~^python\-requests\/' 'Python';
    '~^R$'               'R';
    '~^Java\/'           'Java';
    '~^tiles$'           'Unknown';
    '~^Dalvik\/'         'Dalvik';
    '~^runtastic'        'runtastic';
    'Mozilla/4.0'        'Unknown';
    'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)' 'Unknown';
  }
  
  map $http_referer $denied_referer {
    default '';                      # Not denied
    'http://www.openstreetmap.org/'  'old-osm';
    'http://www.osm.org/'            'old-osm';
    'http://openstreetmap.org'       'fake-osm';
    'http://www.openstreetmap.org'   'fake-osm';
  }
  
  # Limit Cache-Control header to only approved User-Agents
  
negative.code:       }
  
        if ($denied_scraper) {
          set $limit_rate 512;
          return 429;
        }
        if ($denied_referer) {
          set $limit_rate 512;
          return 418;
        }
  
  