nixpkgs/nixos/modules/services/monitoring/smartd.nix
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00

117 lines
3.1 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.smartd;
smartdOpts = { name, ... }: {
options = {
device = mkOption {
example = "/dev/sda";
type = types.str;
description = "Location of the device.";
};
options = mkOption {
default = "";
example = "-d sat";
type = types.separatedString " ";
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}";
};
};
}