1 # DO NOT EDIT - This file is being maintained by Chef
3 upstream tile_cache_backend {
6 # Add the other caches to relieve pressure if local squid failing
7 # Balancer: round-robin
8 <% @caches.each do |cache| -%>
9 <% if cache[:hostname] != node[:hostname] -%>
10 # Server <%= cache[:hostname] %>
11 <% cache.ipaddresses(:family => :inet, :role => :external).sort.each do |address| -%>
12 server <%= address %> backup;
20 # Rates table based on current cookie value
21 map $cookie_qos_token $limit_rate_qos {
22 include /etc/nginx/conf.d/tile_qos_rates.map;
25 # Set-Cookie table based on current cookie value
26 map $cookie_qos_token $cookie_qos_token_set {
27 include /etc/nginx/conf.d/tile_qos_cookies.map;
30 map $http_user_agent $approved_scraper {
31 default ''; # Not approved
33 '~^Mozilla\/5\.0\ QGIS\/' 'QGIS';
36 # Limit Cache-Control header to only approved User-Agents
37 map $http_user_agent $limit_http_cache_control {
38 default ''; # Unset Header
39 '~^Mozilla\/5\.0\ QGIS\/' ''; # Unset Header
40 '~^Mozilla\/5\.0\ ' $http_cache_control; # Pass Header
43 # Limit Pragma header to only approved User-Agents
44 map $http_user_agent $limit_http_pragma {
45 default ''; # Unset Header
46 '~^Mozilla\/5\.0\ QGIS\/' ''; # Unset Header
47 '~^Mozilla\/5\.0\ ' $http_pragma; # Pass Header
51 listen 443 ssl fastopen=2048 http2 default_server;
52 server_name localhost;
56 ssl_certificate /etc/ssl/certs/tile.openstreetmap.org.pem;
57 ssl_certificate_key /etc/ssl/private/tile.openstreetmap.org.key;
60 proxy_pass http://tile_cache_backend;
61 proxy_set_header X-Forwarded-For $remote_addr;
62 proxy_http_version 1.1;
63 proxy_set_header Connection '';
65 proxy_connect_timeout 10s;
67 # Preserve host header.
68 proxy_set_header Host $host;
69 # Do not pass cookies to backends.
70 proxy_set_header Cookie '';
71 # Do not pass Accept-Encoding to backends.
72 proxy_set_header Accept-Encoding '';
74 # Do not allow setting cookies from backends due to caching.
75 proxy_ignore_headers Set-Cookie;
76 proxy_hide_header Set-Cookie;
78 # Set a QoS cookie if none presented (uses nginx Map)
79 add_header Set-Cookie $cookie_qos_token_set;
80 <% if node[:ssl][:strict_transport_security] -%>
81 # Ensure Strict-Transport-Security header is removed from proxied server responses
82 proxy_hide_header Strict-Transport-Security;
85 add_header Strict-Transport-Security "<%= node[:ssl][:strict_transport_security] %>" always;
88 # QoS Traffic Rate see $limit_rate on http://nginx.org/en/docs/http/ngx_http_core_module.html
89 set $limit_rate $limit_rate_qos;
91 # Allow Higher Traffic Rate from Approved User-Agents which do not support cookies (uses nginx Map)
92 if ($approved_scraper) {
93 set $limit_rate 65536;
96 # Strip any ?query parameters from urls
99 # Allow cache purging headers only from select User-Agents (uses nginx Map)
100 proxy_set_header Cache-Control $limit_http_cache_control;
101 proxy_set_header Pragma $limit_http_pragma;