servers/mermet/nginx.nix

   1 {pkgs, lib, config, system, ...}:
   2 let
   3   inherit (builtins) readFile;
   4   inherit (builtins.extraBuiltins) pass;
   5   inherit (lib) types;
   6   inherit (pkgs.lib) loadFile;
   7   inherit (config) networking;
   8   inherit (config.services) nginx;
   9   domainDir = dom: lib.concatStringsSep "/" (lib.reverseList (lib.splitString "." dom));
  10 in
  11 {
  12 imports = [
  13   nginx/sourcephile.fr.nix
  14 ];
  15 options = {
  16   services.nginx = {
  17     webDir = lib.mkOption {
  18       type    = types.str;
  19       default = "/var/www";
  20     };
  21     cacheDir = lib.mkOption {
  22       type    = types.str;
  23       default = "/dev/shm/nginx";
  24     };
  25     logDir = lib.mkOption {
  26       type    = types.str;
  27       default = "/var/log/nginx";
  28     };
  29     configs = lib.mkOption {
  30       type = types.attrsOf types.lines;
  31       default = {};
  32       description = ''
  33         Make some configs available to all virtual hosts.
  34         Useful to workaround the reset of add_header:
  35         https://blog.g3rt.nl/nginx-add_header-pitfall.html
  36       '';
  37       #apply = lib.mapAttrs (name: pkgs.writeText "${name}.conf");
  38     };
  39   };
  40 };
  41 config = {
  42 systemd.services.nginx = {
  43   preStart = lib.mkBefore ''
  44     install -D -d -o ${nginx.user} -g ${nginx.group} -m 0700 \
  45      ${nginx.cacheDir} \
  46      ${nginx.logDir} \
  47      ${nginx.webDir}
  48   '';
  49 };
  50 users.groups."acme".members = [nginx.user];
  51 services.nginx = {
  52   enable = true;
  53   package = pkgs.nginx.override {
  54     modules = with pkgs.nginxModules; [
  55       fancyindex
  56     ];
  57   };
  58   eventsConfig = ''
  59     multi_accept on;
  60     use epoll;
  61     worker_connections 1024;
  62   '';
  63   clientMaxBodySize = "20m";
  64   recommendedGzipSettings = true;
  65   recommendedOptimisation = false;
  66   recommendedProxySettings = true;
  67   recommendedTlsSettings = true;
  68   resolver = {
  69     addresses = [ "127.0.0.1:53" ];
  70     valid = "";
  71     ipv6 = networking.defaultGateway6 != null;
  72   };
  73   serverTokens = false;
  74   # Only allow PFS-enabled ciphers with AES256
  75   #sslCiphers = "AES256+EECDH:AES256+EDH:!aNULL";
  76   #sslCiphers = "HIGH:!ADH:!MD5:!CAMELLIA:!SEED:!3DES:!DES:!RC4:!eNULL";
  77   #sslCiphers = "EECDH+aRSA+AESGCM:EDH+aRSA:EECDH+aRSA:+AES256:+AES128:+SHA1:!CAMELLIA:!SEED:!3DES:!DES:!RC4:!eNULL";
  78   sslDhparam = ../../../sec/openssl/dh.pem;
  79   sslProtocols = "TLSv1.3 TLSv1.2";
  80   configs = rec {
  81     http_add_headers = ''
  82       # Add HSTS header with preloading to HTTPS requests.
  83       # Adding this header to HTTP requests is discouraged
  84       # DOC: https://blog.qualys.com/securitylabs/2016/03/28/the-importance-of-a-proper-http-strict-transport-security-implementation-on-your-web-server
  85       add_header Strict-Transport-Security $hsts_header;
  86
  87       # Enable CSP for your services.
  88       #add_header Content-Security-Policy "script-src 'self'; object-src 'none'; base-uri 'none';" always;
  89
  90       # Minimize information leaked to other domains
  91       add_header 'Referrer-Policy' 'origin-when-cross-origin';
  92
  93       # Disable embedding as a frame
  94       add_header X-Frame-Options DENY;
  95
  96       # Prevent injection of code in other mime types (XSS Attacks)
  97       add_header X-Content-Type-Options nosniff;
  98
  99       # Enable XSS protection of the browser.
 100       # May be unnecessary when CSP is configured properly (see above)
 101       add_header X-XSS-Protection "1; mode=block";
 102     '';
 103     https_add_headers = ''
 104       ${http_add_headers}
 105     '';
 106   };
 107   commonHttpConfig = ''
 108     log_format main '$remote_addr - $remote_user [$time_local] "$request" '
 109                     '$status $body_bytes_sent "$http_referer" '
 110                     '"$http_user_agent" "$http_x_forwarded_for"';
 111
 112     log_format json escape=json
 113       '{'
 114         '"time_local":"$time_local",'
 115         '"remote_addr":"$remote_addr",'
 116         '"status": "$status",'
 117         '"request":"$request",'
 118         '"body_bytes_sent":"$body_bytes_sent",'
 119         '"http_referrer":"$http_referer",'
 120         '"http_user_agent":"$http_user_agent",'
 121         '"remote_user":"$remote_user",'
 122         '"request_time":"$request_time"'
 123       '}';
 124     charset UTF-8;
 125     types {
 126       text/html html5;
 127       text/plain md;
 128     }
 129     '' +
 130     lib.concatStringsSep "\n" (lib.attrValues {
 131       default = ''
 132         default_type application/octet-stream;
 133         root ${nginx.webDir};
 134       '';
 135       security = ''
 136         #error_page 403 = 404;
 137
 138         ${nginx.configs.http_add_headers}
 139
 140         # This might create errors
 141         proxy_cookie_path / "/; secure; HttpOnly; SameSite=strict";
 142       '';
 143       log = ''
 144         access_log ${nginx.logDir}/access.log main buffer=32k;
 145         error_log  ${nginx.logDir}/error.log warn;
 146         open_log_file_cache max=1000 inactive=20s min_uses=2 valid=1m;
 147       '';
 148       proxy = ''
 149         proxy_cache_use_stale updating;
 150         proxy_temp_path ${nginx.cacheDir}/proxy_temp 1 2;
 151       '';
 152       fastcgi = ''
 153         # DOC: http://wiki.nginx.org/HttpFastcgiModule
 154         fastcgi_buffer_size 128k;
 155         fastcgi_buffers 256 4k;
 156         fastcgi_busy_buffers_size 256k;
 157         fastcgi_cache_key "$request_method $scheme://$http_host$request_uri";
 158         fastcgi_connect_timeout 60;
 159         fastcgi_ignore_client_abort off;
 160         fastcgi_intercept_errors on;
 161         fastcgi_max_temp_file_size 2M;
 162         #fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
 163         fastcgi_param SCRIPT_FILENAME $request_filename;
 164         fastcgi_temp_path ${nginx.cacheDir}/fastcgi_temp 1 2;
 165       '';
 166       connection = ''
 167         sendfile on;
 168         # If the client stops reading data,
 169         # free up the stale client connection after this much time.
 170         send_timeout 60;
 171         # Causes nginx to attempt to send its HTTP response head
 172         # in one packet, instead of using partial frames.
 173         # This is useful for prepending headers before calling sendfile,
 174         # or for throughput optimization.
 175         tcp_nopush on;
 176         # Don't buffer data-sends (disable Nagle algorithm).
 177         # Good for sending frequent small bursts of data in real time.
 178         tcp_nodelay on;
 179         keepalive_timeout 20;
 180         reset_timedout_connection on;
 181         types_hash_max_size 4096;
 182         server_names_hash_bucket_size 128;
 183       '';
 184       map = ''
 185         map $time_iso8601 $date {
 186           default 'date-not-found';
 187           '~^(?<year>\d{4})-(?<month>\d{2})-(?<day>\d{2})' $year-$month-$day;
 188         }
 189
 190         map $scheme $hsts_header {
 191           https  "max-age=31536000; includeSubdomains; preload";
 192         }
 193
 194         # User agents that are to be blocked.
 195         #map $http_user_agent $bad_bot {
 196         #  default 0;
 197         #  libwww-perl 1;
 198         #  ~(?i)(httrack|htmlparser|libwww) 1;
 199         #}
 200         # Referrers that are to be blocked.
 201         #map $http_referer $bad_referer {
 202         #  default 0;
 203         #  ~(?i)(babes|casino|click|diamond|forsale|girl|jewelry|love|nudit|organic|poker|porn|poweroversoftware|replica|sex|teen|webcam|zippo) 1;
 204         #}
 205         #geo $not_local {
 206         #  default 1;
 207         #  127.0.0.1 0;
 208         #}
 209       '';
 210       cache = ''
 211         client_body_buffer_size 4K;
 212           # getconf PAGESIZE
 213           # 4096
 214         client_body_temp_path ${nginx.cacheDir}/client_body_temp 1 2;
 215         client_body_timeout 60;
 216         client_header_buffer_size 1k;
 217         client_header_timeout 60;
 218         large_client_header_buffers 4 8k;
 219
 220         open_file_cache max=200000 inactive=20s;
 221         open_file_cache_errors on;
 222         open_file_cache_min_uses 2;
 223         open_file_cache_valid 30s;
 224       '';
 225     });
 226   appendConfig = ''
 227     worker_processes ${toString config.nix.maxJobs};
 228   '';
 229   virtualHosts."_" = {
 230     forceSSL = true;
 231     useACMEHost = networking.domain;
 232   };
 233 };
 234 };
 235 }