X-Git-Url: https://git.openstreetmap.org./chef.git/blobdiff_plain/827ac27f78f21b1021f37f248e846f9d159778da..864d5dd378e3abaceec0119861696aa99f5d5628:/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb

diff --git a/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb b/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb
index f9caaea4d..372bf0e56 100644
--- a/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb
+++ b/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb
@@ -17,16 +17,17 @@ location ~* "^/layer/<%= @layer %>/(\d+)/(\d+)/(\d+)\.(png|jpg|jpeg)$" {
   # Free connection to socket for other requests
   fastcgi_keep_conn off;
 
-  fastcgi_cache_lock on;
   fastcgi_cache_valid 200 21d;
 
   # Serve stale cache on errors or if updating
-  fastcgi_cache_use_stale error timeout updating http_500 http_503 http_504;
+  fastcgi_cache_use_stale error timeout updating http_500 http_503;
   # If in cache as stale, serve stale and update in background
   fastcgi_cache_background_update on;
   # Enable revalidation using If-Modified-Since and If-None-Match for stale items
   fastcgi_cache_revalidate on;
 
+  keepalive_requests 0;
+
   # Ignore client abort as it causes issues with the pipeline
   fastcgi_ignore_client_abort on;
 
@@ -40,6 +41,8 @@ location ~* "^/layer/<%= @layer %>/(\d+)/(\d+)/(\d+)\.(png|jpg|jpeg)$" {
 
   # Add HTTP Cache-Control + Expires Headers
   expires 7d;
+  add_header Cache-Control "stale-while-revalidate=604800, stale-if-error=604800";
+  add_header x-cache-status $upstream_cache_status;
 
   # Allow CORS requests
   add_header 'Access-Control-Allow-Origin' '*';