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29027fd1e1
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.
117 lines
3.1 KiB
Nix
117 lines
3.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.smartd;
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smartdOpts = { name, ... }: {
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options = {
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device = mkOption {
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example = "/dev/sda";
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type = types.str;
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description = "Location of the device.";
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};
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options = mkOption {
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default = "";
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example = "-d sat";
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type = types.separatedString " ";
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description = "Options that determine how smartd monitors the device.";
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};
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};
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};
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smartdMail = pkgs.writeScript "smartdmail.sh" ''
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#! ${pkgs.stdenv.shell}
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TMPNAM=/tmp/smartd-message.$$.tmp
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if test -n "$SMARTD_ADDRESS"; then
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echo >"$TMPNAM" "From: smartd <root>"
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echo >>"$TMPNAM" 'To: undisclosed-recipients:;'
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echo >>"$TMPNAM" "Subject: $SMARTD_SUBJECT"
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echo >>"$TMPNAM"
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echo >>"$TMPNAM" "Failure on $SMARTD_DEVICESTRING: $SMARTD_FAILTYPE"
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echo >>"$TMPNAM"
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cat >>"$TMPNAM"
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${pkgs.smartmontools}/sbin/smartctl >>"$TMPNAM" -a -d "$SMARTD_DEVICETYPE" "$SMARTD_DEVICE"
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/var/setuid-wrappers/sendmail <"$TMPNAM" -f "$SENDER" -i "$SMARTD_ADDRESS"
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fi
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'';
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smartdConf = pkgs.writeText "smartd.conf" (concatMapStrings (device:
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''
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${device.device} -a -m root -M exec ${smartdMail} ${device.options} ${cfg.deviceOpts}
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''
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) cfg.devices);
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smartdFlags = if (cfg.devices == []) then "" else "--configfile=${smartdConf}";
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in
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{
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###### interface
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options = {
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services.smartd = {
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enable = mkOption {
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default = false;
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type = types.bool;
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example = "true";
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description = ''
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Run smartd from the smartmontools package. Note that e-mail
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notifications will not be enabled unless you configure the list of
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devices with <varname>services.smartd.devices</varname> as well.
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'';
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};
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deviceOpts = mkOption {
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default = "";
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type = types.string;
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example = "-o on -s (S/../.././02|L/../../7/04)";
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description = ''
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Additional options for each device that is monitored. The example
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turns on SMART Automatic Offline Testing on startup, and schedules short
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self-tests daily, and long self-tests weekly.
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'';
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};
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devices = mkOption {
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default = [];
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example = [ { device = "/dev/sda"; } { device = "/dev/sdb"; options = "-d sat"; } ];
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type = types.listOf types.optionSet;
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options = [ smartdOpts ];
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description = ''
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List of devices to monitor. By default -- if this list is empty --,
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smartd will monitor all devices connected to the machine at the time
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it's being run. Configuring this option has the added benefit of
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enabling e-mail notifications to "root" every time smartd detects an
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error.
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'';
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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systemd.services.smartd = {
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description = "S.M.A.R.T. Daemon";
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wantedBy = [ "multi-user.target" ];
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serviceConfig.ExecStart = "${pkgs.smartmontools}/sbin/smartd --no-fork ${smartdFlags}";
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};
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};
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}
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