From: Grant Slater <github@firefishy.com>
Date: Tue, 26 Mar 2024 20:56:17 +0000 (+0000)
Subject: imagery: improve tiler caching and keepalive
X-Git-Url: https://git.openstreetmap.org/chef.git/commitdiff_plain/93a486818f8a4a2fd55afa8c00e6226bc3b2462f

imagery: improve tiler caching and keepalive
---

diff --git a/cookbooks/imagery/templates/default/nginx_titiler.conf.erb b/cookbooks/imagery/templates/default/nginx_titiler.conf.erb
index cebf0efab..e84948441 100644
--- a/cookbooks/imagery/templates/default/nginx_titiler.conf.erb
+++ b/cookbooks/imagery/templates/default/nginx_titiler.conf.erb
@@ -63,6 +63,7 @@ server {
       proxy_set_header X-Forwarded-Proto https;
       proxy_set_header X-Forwarded-SSL on;
       proxy_http_version 1.1;
+      proxy_set_header "Connection" "";
       proxy_redirect off;
     }
 
@@ -76,10 +77,16 @@ server {
       proxy_set_header X-Forwarded-Proto https;
       proxy_set_header X-Forwarded-SSL on;
       proxy_http_version 1.1;
+      proxy_set_header "Connection" "";
       proxy_redirect off;
       proxy_cache_key "$scheme$proxy_host$uri";
       proxy_cache ngi-aerial;
-      proxy_cache_valid any 90d;
+      proxy_cache_valid 200 204 180d;
+      proxy_cache_use_stale error timeout updating http_502 http_503 http_504;
+      proxy_cache_background_update on;
+      proxy_ignore_headers Cache-Control;
       expires max;
+      add_header X-Proxy-Cache $upstream_cache_status;
+
     }
 }