A centralized list for these renames is not good because: - It breaks disabledModules for modules that have a rename defined - Adding/removing renames for a module means having to find them in the central file - Merge conflicts due to multiple people editing the central file
		
			
				
	
	
		
			307 lines
		
	
	
		
			12 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			307 lines
		
	
	
		
			12 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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  fpm = config.services.phpfpm.pools.${pool};
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  user = "matomo";
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  dataDir = "/var/lib/${user}";
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  deprecatedDataDir = "/var/lib/piwik";
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  pool = user;
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  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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  imports = [
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    (mkRenamedOptionModule [ "services" "piwik" "enable" ] [ "services" "matomo" "enable" ])
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    (mkRenamedOptionModule [ "services" "piwik" "webServerUser" ] [ "services" "matomo" "webServerUser" ])
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    (mkRemovedOptionModule [ "services" "piwik" "phpfpmProcessManagerConfig" ] "Use services.phpfpm.pools.<name>.settings")
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    (mkRemovedOptionModule [ "services" "matomo" "phpfpmProcessManagerConfig" ] "Use services.phpfpm.pools.<name>.settings")
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    (mkRenamedOptionModule [ "services" "piwik" "nginx" ] [ "services" "matomo" "nginx" ])
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  ];
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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 = ''
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          Matomo package for the service to use.
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          This can be used to point to newer releases from nixos-unstable,
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          as they don't get backported if they are not security-relevant.
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        '';
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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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        description = ''
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          Name of the web server user that forwards requests to <option>services.phpfpm.pools.<name>.socket</option> the 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`, `matomo.php` and `piwik.php` (legacy name) to this socket.
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        '';
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      };
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      periodicArchiveProcessing = mkOption {
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        type = types.bool;
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        default = true;
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        description = ''
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          Enable periodic archive processing, which generates aggregated reports from the visits.
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          This means that you can safely disable browser triggers for Matomo archiving,
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          and safely enable to delete old visitor logs.
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          Before deleting visitor logs,
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          make sure though that you run <literal>systemctl start matomo-archive-processing.service</literal>
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          at least once without errors if you have already collected data before.
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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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      environment.PIWIK_USER_PATH = dataDir;
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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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        # 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 "${cfg.package}/share/config" "${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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    # If this is run regularly via the timer,
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    # 'Browser trigger archiving' can be disabled in Matomo UI > Settings > General Settings.
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    systemd.services.matomo-archive-processing = {
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      description = "Archive Matomo reports";
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      # the archiving 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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      # TODO: might get renamed to MATOMO_USER_PATH in future versions
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      environment.PIWIK_USER_PATH = dataDir;
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      serviceConfig = {
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        Type = "oneshot";
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        User = user;
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        UMask = "0007";
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        CPUSchedulingPolicy = "idle";
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        IOSchedulingClass = "idle";
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        ExecStart = "${cfg.package}/bin/matomo-console core:archive --url=https://${user}.${fqdn}";
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      };
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    };
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    systemd.timers.matomo-archive-processing = mkIf cfg.periodicArchiveProcessing {
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      description = "Automatically archive Matomo reports every hour";
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      wantedBy = [ "timers.target" ];
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      timerConfig = {
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        OnCalendar = "hourly";
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        Persistent = "yes";
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        AccuracySec = "10m";
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      };
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    };
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    systemd.services.${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.pools = 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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        inherit user;
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        phpOptions = ''
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          error_log = 'stderr'
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          log_errors = on
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        '';
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        settings = mapAttrs (name: mkDefault) {
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          "listen.owner" = socketOwner;
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          "listen.group" = "root";
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          "listen.mode" = "0660";
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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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          "catch_workers_output" = true;
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        };
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        phpEnv.PIWIK_USER_PATH = dataDir;
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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:${fpm.socket};
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        '';
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        # allow matomo.php for tracking
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        locations."= /matomo.php".extraConfig = ''
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          fastcgi_pass unix:${fpm.socket};
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        '';
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        # allow piwik.php for tracking (deprecated name)
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        locations."= /piwik.php".extraConfig = ''
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          fastcgi_pass unix:${fpm.socket};
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        '';
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        # Any other attempt to access any php files is forbidden
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        locations."~* ^.+\\.php$".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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        # let browsers cache matomo.js
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        locations."= /matomo.js".extraConfig = ''
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          expires 1M;
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        '';
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        # let browsers cache piwik.js (deprecated name)
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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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