hosts/mermet/rspamd.nix

   1 { pkgs, lib, config, ... }:
   2 let
   3   inherit (builtins) attrNames listToAttrs readFile;
   4   inherit (lib) types;
   5   inherit (pkgs.lib) unlinesAttrs;
   6   inherit (config.security) gnupg;
   7   inherit (config.services) postfix rspamd dovecot2;
   8   redis = config.services.redis.servers.rspamd;
   9   inherit (config.users) users groups;
  10 in
  11 {
  12 imports = [
  13   rspamd/autogeree.net.nix
  14   rspamd/sourcephile.fr.nix
  15 ];
  16 options = {
  17   services.rspamd.dkimSelectorMap = lib.mkOption {
  18     type = types.lines;
  19     default = "";
  20     description = ''Each line maps a domain to its active DKIM selector'';
  21     apply = s: pkgs.writeText "dkim_selectors.map" s;
  22   };
  23 };
  24 config = {
  25 users.groups.redis-rspamd.members = [ rspamd.user ];
  26 users.groups.keys.members = [ rspamd.user ];
  27 services.rspamd = {
  28   enable = true;
  29   debug = false;
  30   postfix.enable = postfix.enable;
  31   locals = {
  32     "dkim_signing.conf".text = ''
  33       selector_map = ${rspamd.dkimSelectorMap};
  34       path = "/run/keys/gnupg/rspamd/dkim/$domain/$selector.key/file";
  35       allow_username_mismatch = true;
  36     '';
  37     "arc.conf".text = ''
  38       selector_map = ${rspamd.dkimSelectorMap};
  39       path = "/run/keys/gnupg/rspamd/dkim/$domain/$selector.key/file";
  40       allow_username_mismatch = true;
  41     '';
  42     "redis.conf".text = ''
  43       servers = "${redis.unixSocket}";
  44       db = "1";
  45     '';
  46     "classifier-bayes.conf".text = ''
  47       users_enabled = false;
  48       backend = "redis";
  49       servers = "${redis.unixSocket}";
  50       database = "1";
  51       autolearn = true;
  52       cache {
  53         backend = "redis";
  54       }
  55       new_schema = true;
  56       statfile {
  57         BAYES_HAM {
  58           spam = false;
  59         }
  60         BAYES_SPAM {
  61           spam = true;
  62         }
  63       }
  64     '';
  65     /*
  66     "logging.conf" = ''
  67       debug_modules = [“dkim_signing”]
  68     '';
  69     */
  70   };
  71   overrides = {
  72     "milter_headers.conf".text = ''
  73       extended_spam_headers = true;
  74     '';
  75     "actions.conf".text = ''
  76       reject     = 15; # Reject when reaching this score
  77       add_header =  6; # Add header when reaching this score
  78       greylist   =  4; # Apply greylisting when reaching this score (will emit `soft reject action`)
  79     '';
  80   };
  81   workers = {
  82     learner = {
  83       # Like controller but without a password, only the bindSockets' permissions
  84       type = "controller";
  85       includes = [ "$CONFDIR/worker-controller.inc" ];
  86       bindSockets = [
  87         { socket = "/run/rspamd/learner.sock";
  88           mode = "0660";
  89           owner = "${rspamd.user}";
  90           group = "${dovecot2.group}";
  91         }
  92       ];
  93       extraConfig = ''
  94       '';
  95     };
  96     controller = {
  97       includes = [
  98         "$CONFDIR/worker-controller.inc"
  99         gnupg.secrets."rspamd/controller/hashedPassword".path
 100       ];
 101       bindSockets = [
 102         "127.0.0.1:11334"
 103       ];
 104       extraConfig = ''
 105         #count = 1;
 106         #static_dir = "''${WWWDIR}";
 107       '';
 108     };
 109   };
 110 };
 111 security.gnupg.secrets."rspamd/controller/hashedPassword" = {
 112   # Generated with: rspamadm pw
 113   user = rspamd.user;
 114   pipe = ''${pkgs.gnused}/bin/sed -e 's/.*/password = "\0";/' '';
 115   systemdConfig.postStart = "systemctl try-restart --no-block rspamd"; # rspamd does not support reloading so far
 116 };
 117 systemd.services.rspamd = {
 118   wants = [ gnupg.secrets."rspamd/controller/hashedPassword".service ];
 119   after = [ gnupg.secrets."rspamd/controller/hashedPassword".service ];
 120 };
 121
 122 fileSystems."/var/lib/redis-rspamd" = {
 123   device = "rpool/var/redis-rspamd";
 124   fsType = "zfs";
 125 };
 126 services.sanoid.datasets."rpool/var/redis-rspamd" = {
 127   use_template = [ "snap" ];
 128   hourly = 0;
 129   daily = 7;
 130   monthly = 0;
 131   yearly = 0;
 132 };
 133
 134 services.redis.vmOverCommit = true;
 135 services.redis.servers.rspamd = {
 136   enable = true;
 137   databases = 16;
 138   syslog = true;
 139   save = [ [1800 100] [300 1000] ];
 140   #unixSocketPerm = "660";
 141   settings = {
 142     maxmemory = "512MB";
 143     maxmemory-policy = "volatile-ttl";
 144   };
 145 };
 146 /*
 147 services.postfix.extraConfig = ''
 148   smtpd_milters = unix:/run/rspamd.sock
 149   milter_default_action = accept
 150 '';
 151 # Allow users to run 'rspamc' and 'rspamadm'.
 152 environment.systemPackages = [ pkgs.rspamd ];
 153 */
 154 };
 155 }