1 files changed, 117 insertions, 0 deletions
diff --git a/nixos/modules/services/monitoring/smartd.nix b/nixos/modules/services/monitoring/smartd.nix
new file mode 100644
index 00000000000..de07dc0dbaa
--- /dev/null
+++ b/nixos/modules/services/monitoring/smartd.nix
@@ -0,0 +1,117 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+
+  cfg = config.services.smartd;
+
+  smartdOpts = { name, ... }: {
+
+    options = {
+
+      device = mkOption {
+        example = "/dev/sda";
+        type = types.string;
+        description = "Location of the device.";
+      };
+
+      options = mkOption {
+        default = "";
+        example = "-d sat";
+        type = types.string;
+        merge = pkgs.lib.concatStringsSep " ";
+        description = "Options that determine how smartd monitors the device";
+      };
+    };
+
+  };
+
+  smartdMail = pkgs.writeScript "smartdmail.sh" ''
+    #! ${pkgs.stdenv.shell}
+    TMPNAM=/tmp/smartd-message.$$.tmp
+    if test -n "$SMARTD_ADDRESS"; then
+      echo  >"$TMPNAM" "From: smartd <root>"
+      echo >>"$TMPNAM" 'To: undisclosed-recipients:;'
+      echo >>"$TMPNAM" "Subject: $SMARTD_SUBJECT"
+      echo >>"$TMPNAM"
+      echo >>"$TMPNAM" "Failure on $SMARTD_DEVICESTRING: $SMARTD_FAILTYPE"
+      echo >>"$TMPNAM"
+      cat  >>"$TMPNAM"
+      ${pkgs.smartmontools}/sbin/smartctl >>"$TMPNAM" -a -d "$SMARTD_DEVICETYPE" "$SMARTD_DEVICE"
+      /var/setuid-wrappers/sendmail  <"$TMPNAM" -f "$SENDER" -i "$SMARTD_ADDRESS"
+    fi
+  '';
+
+  smartdConf = pkgs.writeText "smartd.conf" (concatMapStrings (device:
+    ''
+      ${device.device} -a -m root -M exec ${smartdMail} ${device.options} ${cfg.deviceOpts}
+    ''
+    ) cfg.devices);
+
+  smartdFlags = if (cfg.devices == []) then "" else "--configfile=${smartdConf}";
+
+in
+
+{
+  ###### interface
+
+  options = {
+
+    services.smartd = {
+
+      enable = mkOption {
+        default = false;
+        type = types.bool;
+        example = "true";
+        description = ''
+          Run smartd from the smartmontools package. Note that e-mail
+          notifications will not be enabled unless you configure the list of
+          devices with <varname>services.smartd.devices</varname> as well.
+        '';
+      };
+
+      deviceOpts = mkOption {
+        default = "";
+        type = types.string;
+        example = "-o on -s (S/../.././02|L/../../7/04)";
+        description = ''
+          Additional options for each device that is monitored. The example
+          turns on SMART Automatic Offline Testing on startup, and schedules short
+          self-tests daily, and long self-tests weekly.
+        '';
+      };
+
+      devices = mkOption {
+        default = [];
+        example = [ { device = "/dev/sda"; } { device = "/dev/sdb"; options = "-d sat"; } ];
+        type = types.listOf types.optionSet;
+        options = [ smartdOpts ];
+        description = ''
+          List of devices to monitor. By default -- if this list is empty --,
+          smartd will monitor all devices connected to the machine at the time
+          it's being run. Configuring this option has the added benefit of
+          enabling e-mail notifications to "root" every time smartd detects an
+          error.
+        '';
+       };
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    systemd.services.smartd = {
+      description = "S.M.A.R.T. Daemon";
+
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig.ExecStart = "${pkgs.smartmontools}/sbin/smartd --no-fork ${smartdFlags}";
+    };
+
+  };
+
+}