253 lines
9.5 KiB
Nix
253 lines
9.5 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.matomo;
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user = "matomo";
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dataDir = "/var/lib/${user}";
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deprecatedDataDir = "/var/lib/piwik";
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pool = user;
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# it's not possible to use /run/phpfpm/${pool}.sock because /run/phpfpm/ is root:root 0770,
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# and therefore is not accessible by the web server.
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phpSocket = "/run/phpfpm-${pool}.sock";
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phpExecutionUnit = "phpfpm-${pool}";
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databaseService = "mysql.service";
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fqdn =
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let
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join = hostName: domain: hostName + optionalString (domain != null) ".${domain}";
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in join config.networking.hostName config.networking.domain;
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in {
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options = {
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services.matomo = {
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# NixOS PR for database setup: https://github.com/NixOS/nixpkgs/pull/6963
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# matomo issue for automatic matomo setup: https://github.com/matomo-org/matomo/issues/10257
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# TODO: find a nice way to do this when more NixOS MySQL and / or matomo automatic setup stuff is implemented.
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable matomo web analytics with php-fpm backend.
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Either the nginx option or the webServerUser option is mandatory.
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'';
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};
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package = mkOption {
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type = types.package;
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description = "Matomo package to use";
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default = pkgs.matomo;
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defaultText = "pkgs.matomo";
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};
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webServerUser = mkOption {
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type = types.nullOr types.str;
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default = null;
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example = "lighttpd";
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# TODO: piwik.php might get renamed to matomo.php in future releases
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description = ''
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Name of the web server user that forwards requests to the ${phpSocket} fastcgi socket for matomo if the nginx
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option is not used. Either this option or the nginx option is mandatory.
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If you want to use another webserver than nginx, you need to set this to that server's user
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and pass fastcgi requests to `index.php` and `piwik.php` to this socket.
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'';
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};
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phpfpmProcessManagerConfig = mkOption {
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type = types.str;
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default = ''
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; default phpfpm process manager settings
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pm = dynamic
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pm.max_children = 75
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pm.start_servers = 10
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pm.min_spare_servers = 5
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pm.max_spare_servers = 20
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pm.max_requests = 500
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; log worker's stdout, but this has a performance hit
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catch_workers_output = yes
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'';
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description = ''
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Settings for phpfpm's process manager. You might need to change this depending on the load for matomo.
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'';
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};
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nginx = mkOption {
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type = types.nullOr (types.submodule (
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recursiveUpdate
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(import ../web-servers/nginx/vhost-options.nix { inherit config lib; })
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{
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# enable encryption by default,
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# as sensitive login and matomo data should not be transmitted in clear text.
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options.forceSSL.default = true;
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options.enableACME.default = true;
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}
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)
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);
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default = null;
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example = {
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serverAliases = [
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"matomo.$\{config.networking.domain\}"
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"stats.$\{config.networking.domain\}"
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];
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enableACME = false;
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};
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description = ''
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With this option, you can customize an nginx virtualHost which already has sensible defaults for matomo.
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Either this option or the webServerUser option is mandatory.
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Set this to {} to just enable the virtualHost if you don't need any customization.
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If enabled, then by default, the <option>serverName</option> is
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<literal>${user}.$\{config.networking.hostName\}.$\{config.networking.domain\}</literal>,
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SSL is active, and certificates are acquired via ACME.
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If this is set to null (the default), no nginx virtualHost will be configured.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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warnings = mkIf (cfg.nginx != null && cfg.webServerUser != null) [
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"If services.matomo.nginx is set, services.matomo.nginx.webServerUser is ignored and should be removed."
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];
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assertions = [ {
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assertion = cfg.nginx != null || cfg.webServerUser != null;
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message = "Either services.matomo.nginx or services.matomo.nginx.webServerUser is mandatory";
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}];
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users.users.${user} = {
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isSystemUser = true;
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createHome = true;
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home = dataDir;
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group = user;
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};
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users.groups.${user} = {};
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systemd.services.matomo_setup_update = {
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# everything needs to set up and up to date before matomo php files are executed
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requiredBy = [ "${phpExecutionUnit}.service" ];
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before = [ "${phpExecutionUnit}.service" ];
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# the update part of the script can only work if the database is already up and running
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requires = [ databaseService ];
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after = [ databaseService ];
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path = [ cfg.package ];
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serviceConfig = {
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Type = "oneshot";
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User = user;
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# hide especially config.ini.php from other
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UMask = "0007";
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# TODO: might get renamed to MATOMO_USER_PATH in future versions
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Environment = "PIWIK_USER_PATH=${dataDir}";
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# chown + chmod in preStart needs root
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PermissionsStartOnly = true;
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};
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# correct ownership and permissions in case they're not correct anymore,
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# e.g. after restoring from backup or moving from another system.
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# Note that ${dataDir}/config/config.ini.php might contain the MySQL password.
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preStart = ''
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# migrate data from piwik to matomo folder
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if [ -d ${deprecatedDataDir} ]; then
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echo "Migrating from ${deprecatedDataDir} to ${dataDir}"
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mv -T ${deprecatedDataDir} ${dataDir}
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fi
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chown -R ${user}:${user} ${dataDir}
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chmod -R ug+rwX,o-rwx ${dataDir}
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'';
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script = ''
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# Use User-Private Group scheme to protect matomo data, but allow administration / backup via matomo group
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# Copy config folder
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chmod g+s "${dataDir}"
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cp -r "${cfg.package}/config" "${dataDir}/"
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chmod -R u+rwX,g+rwX,o-rwx "${dataDir}"
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# check whether user setup has already been done
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if test -f "${dataDir}/config/config.ini.php"; then
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# then execute possibly pending database upgrade
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matomo-console core:update --yes
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fi
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'';
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};
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systemd.services.${phpExecutionUnit} = {
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# stop phpfpm on package upgrade, do database upgrade via matomo_setup_update, and then restart
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restartTriggers = [ cfg.package ];
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# stop config.ini.php from getting written with read permission for others
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serviceConfig.UMask = "0007";
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};
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services.phpfpm.poolConfigs = let
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# workaround for when both are null and need to generate a string,
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# which is illegal, but as assertions apparently are being triggered *after* config generation,
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# we have to avoid already throwing errors at this previous stage.
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socketOwner = if (cfg.nginx != null) then config.services.nginx.user
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else if (cfg.webServerUser != null) then cfg.webServerUser else "";
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in {
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${pool} = ''
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listen = "${phpSocket}"
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listen.owner = ${socketOwner}
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listen.group = root
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listen.mode = 0600
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user = ${user}
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env[PIWIK_USER_PATH] = ${dataDir}
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${cfg.phpfpmProcessManagerConfig}
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'';
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};
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services.nginx.virtualHosts = mkIf (cfg.nginx != null) {
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# References:
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# https://fralef.me/piwik-hardening-with-nginx-and-php-fpm.html
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# https://github.com/perusio/piwik-nginx
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"${user}.${fqdn}" = mkMerge [ cfg.nginx {
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# don't allow to override the root easily, as it will almost certainly break matomo.
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# disadvantage: not shown as default in docs.
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root = mkForce "${cfg.package}/share";
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# define locations here instead of as the submodule option's default
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# so that they can easily be extended with additional locations if required
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# without needing to redefine the matomo ones.
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# disadvantage: not shown as default in docs.
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locations."/" = {
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index = "index.php";
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};
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# allow index.php for webinterface
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locations."= /index.php".extraConfig = ''
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fastcgi_pass unix:${phpSocket};
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'';
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# TODO: might get renamed to matomo.php in future versions
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# allow piwik.php for tracking
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locations."= /piwik.php".extraConfig = ''
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fastcgi_pass unix:${phpSocket};
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'';
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# Any other attempt to access any php files is forbidden
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locations."~* ^.+\.php$".extraConfig = ''
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return 403;
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'';
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# Disallow access to unneeded directories
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# config and tmp are already removed
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locations."~ ^/(?:core|lang|misc)/".extraConfig = ''
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return 403;
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'';
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# Disallow access to several helper files
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locations."~* \.(?:bat|git|ini|sh|txt|tpl|xml|md)$".extraConfig = ''
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return 403;
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'';
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# No crawling of this site for bots that obey robots.txt - no useful information here.
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locations."= /robots.txt".extraConfig = ''
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return 200 "User-agent: *\nDisallow: /\n";
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'';
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# TODO: might get renamed to matomo.js in future versions
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# let browsers cache piwik.js
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locations."= /piwik.js".extraConfig = ''
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expires 1M;
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'';
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}];
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};
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};
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meta = {
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doc = ./matomo-doc.xml;
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maintainers = with lib.maintainers; [ florianjacob ];
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};
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}
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