+# DO NOT EDIT - This file is being maintained by Chef
+
upstream tile_cache_backend {
server 127.0.0.1;
<% @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;
<% end -%>
<% end -%>
+ <% end -%>
keepalive 32;
}
+# Rates table based on current cookie value
+map $cookie_qos_token $limit_rate_qos {
+ include /etc/nginx/conf.d/tile_qos_rates.map;
+}
+
+# Set-Cookie table based on current cookie value
+map $cookie_qos_token $cookie_qos_token_set {
+ include /etc/nginx/conf.d/tile_qos_cookies.map;
+}
+
+map $http_user_agent $approved_scraper {
+ default ''; # Not approved
+ '~^JOSM\/' 'JOSM';
+ '~^Mozilla\/5\.0\ QGIS\/' 'QGIS';
+}
+
+# Limit Cache-Control header to only approved User-Agents
+map $http_user_agent $limit_http_cache_control {
+ default ''; # Unset Header
+ '~^Mozilla\/5\.0\ QGIS\/' ''; # Unset Header
+ '~^Mozilla\/5\.0\ ' $http_cache_control; # Pass Header
+}
+
+# Limit Pragma header to only approved User-Agents
+map $http_user_agent $limit_http_pragma {
+ default ''; # Unset Header
+ '~^Mozilla\/5\.0\ QGIS\/' ''; # Unset Header
+ '~^Mozilla\/5\.0\ ' $http_pragma; # Pass Header
+}
+
server {
- listen 443 ssl spdy default_server;
+ listen 443 ssl fastopen=2048 http2 default_server;
server_name localhost;
proxy_buffers 8 64k;
ssl_stapling on;
ssl_dhparam /etc/ssl/certs/dhparam.pem;
resolver <%= @resolvers.join(" ") %>;
+ resolver_timeout 5s;
location / {
proxy_pass http://tile_cache_backend;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_http_version 1.1;
+ proxy_set_header Connection '';
+
+ proxy_connect_timeout 5s;
+
+ # Do not pass cookies to backends.
+ proxy_set_header Cookie '';
+ # Do not pass Accept-Encoding to backends.
+ proxy_set_header Accept-Encoding '';
+
+ # Do not allow setting cookies from backends due to caching.
+ proxy_ignore_headers Set-Cookie;
+ proxy_hide_header Set-Cookie;
+
+ # Set a QoS cookie if none presented (uses nginx Map)
+ add_header Set-Cookie $cookie_qos_token_set;
+
+ # QoS Traffic Rate see $limit_rate on http://nginx.org/en/docs/http/ngx_http_core_module.html
+ set $limit_rate $limit_rate_qos;
+
+ # Allow Higher Traffic Rate from Approved User-Agents which do not support cookies (uses nginx Map)
+ if ($approved_scraper) {
+ set $limit_rate 32768;
+ }
+
+ # Strip any ?query parameters from urls
+ set $args '';
+
+ # Allow cache purging headers only from select User-Agents (uses nginx Map)
+ proxy_set_header Cache-Control $limit_http_cache_control;
+ proxy_set_header Pragma $limit_http_pragma;
}
}