tilecache: use stale cache over 404

[chef.git] / cookbooks / tilecache / templates / default / nginx_tile.conf.erb

diff --git a/cookbooks/tilecache/templates/default/nginx_tile.conf.erb b/cookbooks/tilecache/templates/default/nginx_tile.conf.erb
index 6e964e157670156eb861e2ece0fae44808bdeb51..db4612bc87f16833715d950efb57029277c27adc 100644 (file)
--- a/cookbooks/tilecache/templates/default/nginx_tile.conf.erb
+++ b/cookbooks/tilecache/templates/default/nginx_tile.conf.erb
@@ -1,18 +1,15 @@
 # DO NOT EDIT - This file is being maintained by Chef
 
 upstream tile_cache_backend {
-  server 127.0.0.1;
-  server 127.0.0.2;
-  server 127.0.0.3;
+  server 127.0.0.1:8080;
+  server 127.0.0.2:8080;
 
   # Add the other caches to relieve pressure if local squid failing
   # Balancer: round-robin
 <% @caches.each do |cache| -%>
 <% if cache[:hostname] != node[:hostname] -%>
-<% if node[:tilecache][:tile_siblings].include? cache[:fqdn] -%>
 <% cache.ipaddresses(:family => :inet, :role => :external).sort.each do |address| -%>
-  server <%= address %> backup; # Server <%= cache[:hostname] %>
-<% end -%>
+  server <%= address %>:80 backup; # Server <%= cache[:hostname] %>
 <% end -%>
 <% end -%>
 <% end -%>
@@ -93,10 +90,16 @@ map $osm_referer$http_user_agent $limit_http_pragma {
 }
 
 server {
+    # IPv4
+    listen       80 deferred backlog=16384 reuseport fastopen=2048 default_server;
     listen       443 ssl deferred backlog=16384 reuseport fastopen=2048 http2 default_server;
+    # IPv6
+    listen       [::]:80 deferred backlog=16384 reuseport fastopen=2048 default_server;
+    listen       [::]:443 ssl deferred backlog=16384 reuseport fastopen=2048 http2 default_server;
     server_name  localhost;
 
     proxy_buffers 8 64k;
+    proxy_busy_buffers_size 64k;
 
     ssl_certificate      /etc/ssl/certs/tile.openstreetmap.org.pem;
     ssl_certificate_key  /etc/ssl/private/tile.openstreetmap.org.key;
@@ -179,6 +182,11 @@ server {
     # Dedicated zoom handler for caching
     location /<%= i %>/ {
 <% end %>
+      # Only allow GET / HEAD / OPTIONS (CORS) requests
+      limit_except GET HEAD OPTIONS {
+        deny all;
+      }
+
       proxy_pass http://tile_cache_backend;
       proxy_set_header X-Forwarded-For $remote_addr;
       proxy_http_version 1.1;
@@ -219,12 +227,14 @@ server {
       proxy_cache_valid 200 1d;
       proxy_cache_valid 404 15m;
       # Serve stale cache on errors or if updating
-      proxy_cache_use_stale error timeout updating http_500 http_503 http_504;
+      proxy_cache_use_stale error timeout updating http_404 http_500 http_503 http_504;
       # If in cache as stale, serve stale and update in background
       proxy_cache_background_update on;
+      # Enable revalidation using If-Modified-Since and If-None-Match for stale items
+      proxy_cache_revalidate on;
       proxy_cache_min_uses 8;
 
-      add_header X-Nginx-Cache-Status $upstream_cache_status;
+      add_header x-cache-status $upstream_cache_status;
 <% end -%>
 
       # Set a QoS cookie if none presented (uses nginx Map)