nginx-tilecache

#
# Nginx >= 1.9.15 - 1.10.1 recommended
#
# Thanks to https://github.com/cbricart
proxy_cache_path /var/www/tilecache/osm
  levels=1:2 inactive=7d
  keys_zone=tilecache:64m
  max_size=500M;

upstream osm_tiles {
        server a.tile.openstreetmap.org;
        server b.tile.openstreetmap.org;
        server c.tile.openstreetmap.org;
        keepalive 16;
}

server {
        listen 127.0.0.1:8090 ;

        access_log              /var/www/tilecache/logs/access.log;
        error_log               /var/www/tilecache/logs/error.log;

        root /var/www/tilecache/html;

        location / {
                try_files $uri @osm;
        }

        location @osm {
                proxy_pass http://osm_tiles;
                proxy_http_version      1.1;
                proxy_set_header    Connection "";
                proxy_set_header    Accept-Encoding "";
                proxy_set_header    User-Agent "Mozilla/5.0 (compatible; OSMTileCache/1.0; +mailto:noc@freifunk-suedhosltein.de; +https://map.freifunk-suedholstein.de/)";
                proxy_set_header    Host tile.openstreetmap.org;

                proxy_temp_path     /var/www/tilecache/temp;
                proxy_cache         tilecache;
                proxy_store         off;
                proxy_cache_key     $uri$is_args$args;
                proxy_ignore_headers Expires Cache-Control;
                proxy_cache_valid   200 301 302 7d;
                proxy_cache_valid   404 1m;
                proxy_cache_valid   any 1m;
                proxy_next_upstream   error timeout invalid_header http_500 http_502 http_503 http_504 http_403 http_404;
                proxy_cache_use_stale error timeout updating invalid_header http_500 http_502 http_503 http_504 http_403 http_404;

                proxy_hide_header   Via;
                proxy_hide_header   X-Cache;
                proxy_hide_header   X-Cache-Lookup;

                expires 7d;
        }
}