602 lines
17 KiB
Nix
602 lines
17 KiB
Nix
{ config, pkgs, utils, ... }:
|
||
|
||
with pkgs.lib;
|
||
with utils;
|
||
with import ./systemd-unit-options.nix { inherit config pkgs; };
|
||
|
||
let
|
||
|
||
cfg = config.systemd;
|
||
|
||
systemd = cfg.package;
|
||
|
||
makeUnit = name: unit:
|
||
pkgs.runCommand "unit" { inherit (unit) text; }
|
||
(if unit.enable then ''
|
||
mkdir -p $out
|
||
echo -n "$text" > $out/${name}
|
||
'' else ''
|
||
mkdir -p $out
|
||
ln -s /dev/null $out/${name}
|
||
'');
|
||
|
||
upstreamUnits =
|
||
[ # Targets.
|
||
"basic.target"
|
||
"sysinit.target"
|
||
"sockets.target"
|
||
"graphical.target"
|
||
"multi-user.target"
|
||
"getty.target"
|
||
"network.target"
|
||
"nss-lookup.target"
|
||
"nss-user-lookup.target"
|
||
"time-sync.target"
|
||
#"cryptsetup.target"
|
||
"sigpwr.target"
|
||
"timers.target"
|
||
"paths.target"
|
||
|
||
# Rescue mode.
|
||
"rescue.target"
|
||
"rescue.service"
|
||
|
||
# Udev.
|
||
"systemd-udevd-control.socket"
|
||
"systemd-udevd-kernel.socket"
|
||
"systemd-udevd.service"
|
||
"systemd-udev-settle.service"
|
||
"systemd-udev-trigger.service"
|
||
|
||
# Hardware (started by udev when a relevant device is plugged in).
|
||
"sound.target"
|
||
"bluetooth.target"
|
||
"printer.target"
|
||
"smartcard.target"
|
||
|
||
# Login stuff.
|
||
"systemd-logind.service"
|
||
"autovt@.service"
|
||
#"systemd-vconsole-setup.service"
|
||
"systemd-user-sessions.service"
|
||
"dbus-org.freedesktop.login1.service"
|
||
"user@.service"
|
||
|
||
# Journal.
|
||
"systemd-journald.socket"
|
||
"systemd-journald.service"
|
||
"systemd-journal-flush.service"
|
||
"syslog.socket"
|
||
|
||
# SysV init compatibility.
|
||
"systemd-initctl.socket"
|
||
"systemd-initctl.service"
|
||
"runlevel0.target"
|
||
"runlevel1.target"
|
||
"runlevel2.target"
|
||
"runlevel3.target"
|
||
"runlevel4.target"
|
||
"runlevel5.target"
|
||
"runlevel6.target"
|
||
|
||
# Random seed.
|
||
"systemd-random-seed-load.service"
|
||
"systemd-random-seed-save.service"
|
||
|
||
# Utmp maintenance.
|
||
"systemd-update-utmp-runlevel.service"
|
||
"systemd-update-utmp-shutdown.service"
|
||
|
||
# Kernel module loading.
|
||
#"systemd-modules-load.service"
|
||
|
||
# Filesystems.
|
||
"systemd-fsck@.service"
|
||
"systemd-fsck-root.service"
|
||
"systemd-remount-fs.service"
|
||
"local-fs.target"
|
||
"local-fs-pre.target"
|
||
"remote-fs.target"
|
||
"remote-fs-pre.target"
|
||
"swap.target"
|
||
"dev-hugepages.mount"
|
||
"dev-mqueue.mount"
|
||
"sys-fs-fuse-connections.mount"
|
||
"sys-kernel-config.mount"
|
||
"sys-kernel-debug.mount"
|
||
|
||
# Hibernate / suspend.
|
||
"hibernate.target"
|
||
"suspend.target"
|
||
"sleep.target"
|
||
"hybrid-sleep.target"
|
||
"systemd-hibernate.service"
|
||
"systemd-suspend.service"
|
||
"systemd-hybrid-sleep.service"
|
||
"systemd-shutdownd.socket"
|
||
"systemd-shutdownd.service"
|
||
|
||
# Reboot stuff.
|
||
"reboot.target"
|
||
"systemd-reboot.service"
|
||
"poweroff.target"
|
||
"systemd-poweroff.service"
|
||
"halt.target"
|
||
"systemd-halt.service"
|
||
"ctrl-alt-del.target"
|
||
"shutdown.target"
|
||
"umount.target"
|
||
"final.target"
|
||
"kexec.target"
|
||
|
||
# Password entry.
|
||
"systemd-ask-password-console.path"
|
||
"systemd-ask-password-console.service"
|
||
"systemd-ask-password-wall.path"
|
||
"systemd-ask-password-wall.service"
|
||
]
|
||
|
||
++ optionals cfg.enableEmergencyMode [
|
||
"emergency.target"
|
||
"emergency.service"
|
||
];
|
||
|
||
upstreamWants =
|
||
[ #"basic.target.wants"
|
||
"sysinit.target.wants"
|
||
"sockets.target.wants"
|
||
"local-fs.target.wants"
|
||
"multi-user.target.wants"
|
||
"shutdown.target.wants"
|
||
"timers.target.wants"
|
||
];
|
||
|
||
makeJobScript = name: text:
|
||
let x = pkgs.writeTextFile { name = "unit-script"; executable = true; destination = "/bin/${name}"; inherit text; };
|
||
in "${x}/bin/${name}";
|
||
|
||
unitConfig = { name, config, ... }: {
|
||
config = {
|
||
unitConfig =
|
||
{ Requires = concatStringsSep " " config.requires;
|
||
Wants = concatStringsSep " " config.wants;
|
||
After = concatStringsSep " " config.after;
|
||
Before = concatStringsSep " " config.before;
|
||
BindsTo = concatStringsSep " " config.bindsTo;
|
||
PartOf = concatStringsSep " " config.partOf;
|
||
"X-Restart-Triggers" = toString config.restartTriggers;
|
||
} // optionalAttrs (config.description != "") {
|
||
Description = config.description;
|
||
};
|
||
};
|
||
};
|
||
|
||
serviceConfig = { name, config, ... }: {
|
||
config = {
|
||
# Default path for systemd services. Should be quite minimal.
|
||
path =
|
||
[ pkgs.coreutils
|
||
pkgs.findutils
|
||
pkgs.gnugrep
|
||
pkgs.gnused
|
||
systemd
|
||
];
|
||
};
|
||
};
|
||
|
||
mountConfig = { name, config, ... }: {
|
||
config = {
|
||
mountConfig =
|
||
{ What = config.what;
|
||
Where = config.where;
|
||
} // optionalAttrs (config.type != "") {
|
||
Type = config.type;
|
||
} // optionalAttrs (config.options != "") {
|
||
Options = config.options;
|
||
};
|
||
};
|
||
};
|
||
|
||
toOption = x:
|
||
if x == true then "true"
|
||
else if x == false then "false"
|
||
else toString x;
|
||
|
||
attrsToSection = as:
|
||
concatStrings (concatLists (mapAttrsToList (name: value:
|
||
map (x: ''
|
||
${name}=${toOption x}
|
||
'')
|
||
(if isList value then value else [value]))
|
||
as));
|
||
|
||
targetToUnit = name: def:
|
||
{ inherit (def) wantedBy requiredBy enable;
|
||
text =
|
||
''
|
||
[Unit]
|
||
${attrsToSection def.unitConfig}
|
||
'';
|
||
};
|
||
|
||
serviceToUnit = name: def:
|
||
{ inherit (def) wantedBy requiredBy enable;
|
||
text =
|
||
''
|
||
[Unit]
|
||
${attrsToSection def.unitConfig}
|
||
|
||
[Service]
|
||
Environment=PATH=${def.path}
|
||
Environment=LD_LIBRARY_PATH=
|
||
${let env = cfg.globalEnvironment // def.environment;
|
||
in concatMapStrings (n: "Environment=\"${n}=${getAttr n env}\"\n") (attrNames env)}
|
||
${optionalString (!def.restartIfChanged) "X-RestartIfChanged=false"}
|
||
${optionalString (!def.stopIfChanged) "X-StopIfChanged=false"}
|
||
|
||
${optionalString (def.preStart != "") ''
|
||
ExecStartPre=${makeJobScript "${name}-pre-start" ''
|
||
#! ${pkgs.stdenv.shell} -e
|
||
${def.preStart}
|
||
''}
|
||
''}
|
||
|
||
${optionalString (def.script != "") ''
|
||
ExecStart=${makeJobScript "${name}-start" ''
|
||
#! ${pkgs.stdenv.shell} -e
|
||
${def.script}
|
||
''} ${def.scriptArgs}
|
||
''}
|
||
|
||
${optionalString (def.postStart != "") ''
|
||
ExecStartPost=${makeJobScript "${name}-post-start" ''
|
||
#! ${pkgs.stdenv.shell} -e
|
||
${def.postStart}
|
||
''}
|
||
''}
|
||
|
||
${optionalString (def.postStop != "") ''
|
||
ExecStopPost=${makeJobScript "${name}-post-stop" ''
|
||
#! ${pkgs.stdenv.shell} -e
|
||
${def.postStop}
|
||
''}
|
||
''}
|
||
|
||
${attrsToSection def.serviceConfig}
|
||
'';
|
||
};
|
||
|
||
socketToUnit = name: def:
|
||
{ inherit (def) wantedBy requiredBy enable;
|
||
text =
|
||
''
|
||
[Unit]
|
||
${attrsToSection def.unitConfig}
|
||
|
||
[Socket]
|
||
${attrsToSection def.socketConfig}
|
||
${concatStringsSep "\n" (map (s: "ListenStream=${s}") def.listenStreams)}
|
||
'';
|
||
};
|
||
|
||
timerToUnit = name: def:
|
||
{ inherit (def) wantedBy requiredBy enable;
|
||
text =
|
||
''
|
||
[Unit]
|
||
${attrsToSection def.unitConfig}
|
||
|
||
[Timer]
|
||
${attrsToSection def.timerConfig}
|
||
'';
|
||
};
|
||
|
||
mountToUnit = name: def:
|
||
{ inherit (def) wantedBy requiredBy enable;
|
||
text =
|
||
''
|
||
[Unit]
|
||
${attrsToSection def.unitConfig}
|
||
|
||
[Mount]
|
||
${attrsToSection def.mountConfig}
|
||
'';
|
||
};
|
||
|
||
nixosUnits = mapAttrsToList makeUnit cfg.units;
|
||
|
||
units = pkgs.runCommand "units" { preferLocalBuild = true; }
|
||
''
|
||
mkdir -p $out
|
||
for i in ${toString upstreamUnits}; do
|
||
fn=${systemd}/example/systemd/system/$i
|
||
if ! [ -e $fn ]; then echo "missing $fn"; false; fi
|
||
if [ -L $fn ]; then
|
||
cp -pd $fn $out/
|
||
else
|
||
ln -s $fn $out/
|
||
fi
|
||
done
|
||
|
||
for i in ${toString upstreamWants}; do
|
||
fn=${systemd}/example/systemd/system/$i
|
||
if ! [ -e $fn ]; then echo "missing $fn"; false; fi
|
||
x=$out/$(basename $fn)
|
||
mkdir $x
|
||
for i in $fn/*; do
|
||
y=$x/$(basename $i)
|
||
cp -pd $i $y
|
||
if ! [ -e $y ]; then rm -v $y; fi
|
||
done
|
||
done
|
||
|
||
for i in ${toString nixosUnits}; do
|
||
ln -s $i/* $out/
|
||
done
|
||
|
||
for i in ${toString cfg.packages}; do
|
||
ln -s $i/etc/systemd/system/* $out/
|
||
done
|
||
|
||
${concatStrings (mapAttrsToList (name: unit:
|
||
concatMapStrings (name2: ''
|
||
mkdir -p $out/${name2}.wants
|
||
ln -sfn ../${name} $out/${name2}.wants/
|
||
'') unit.wantedBy) cfg.units)}
|
||
|
||
${concatStrings (mapAttrsToList (name: unit:
|
||
concatMapStrings (name2: ''
|
||
mkdir -p $out/${name2}.requires
|
||
ln -sfn ../${name} $out/${name2}.requires/
|
||
'') unit.requiredBy) cfg.units)}
|
||
|
||
ln -s ${cfg.defaultUnit} $out/default.target
|
||
|
||
ln -s rescue.target $out/kbrequest.target
|
||
|
||
mkdir -p $out/getty.target.wants/
|
||
ln -s ../getty@tty1.service $out/getty.target.wants/
|
||
|
||
ln -s ../local-fs.target ../remote-fs.target ../network.target ../nss-lookup.target \
|
||
../nss-user-lookup.target ../swap.target $out/multi-user.target.wants/
|
||
''; # */
|
||
|
||
in
|
||
|
||
{
|
||
|
||
###### interface
|
||
|
||
options = {
|
||
|
||
systemd.package = mkOption {
|
||
default = pkgs.systemd;
|
||
type = types.package;
|
||
description = "The systemd package.";
|
||
};
|
||
|
||
systemd.units = mkOption {
|
||
description = "Definition of systemd units.";
|
||
default = {};
|
||
type = types.attrsOf types.optionSet;
|
||
options = {
|
||
text = mkOption {
|
||
types = types.uniq types.string;
|
||
description = "Text of this systemd unit.";
|
||
};
|
||
enable = mkOption {
|
||
default = true;
|
||
types = types.bool;
|
||
description = ''
|
||
If set to false, this unit will be a symlink to
|
||
/dev/null. This is primarily useful to prevent specific
|
||
template instances (e.g. <literal>serial-getty@ttyS0</literal>)
|
||
from being started.
|
||
'';
|
||
};
|
||
requiredBy = mkOption {
|
||
default = [];
|
||
types = types.listOf types.string;
|
||
description = "Units that require (i.e. depend on and need to go down with) this unit.";
|
||
};
|
||
wantedBy = mkOption {
|
||
default = [];
|
||
types = types.listOf types.string;
|
||
description = "Units that want (i.e. depend on) this unit.";
|
||
};
|
||
};
|
||
};
|
||
|
||
systemd.packages = mkOption {
|
||
default = [];
|
||
type = types.listOf types.package;
|
||
description = "Packages providing systemd units.";
|
||
};
|
||
|
||
systemd.targets = mkOption {
|
||
default = {};
|
||
type = types.attrsOf types.optionSet;
|
||
options = [ unitOptions unitConfig ];
|
||
description = "Definition of systemd target units.";
|
||
};
|
||
|
||
systemd.services = mkOption {
|
||
default = {};
|
||
type = types.attrsOf types.optionSet;
|
||
options = [ serviceOptions unitConfig serviceConfig ];
|
||
description = "Definition of systemd service units.";
|
||
};
|
||
|
||
systemd.sockets = mkOption {
|
||
default = {};
|
||
type = types.attrsOf types.optionSet;
|
||
options = [ socketOptions unitConfig ];
|
||
description = "Definition of systemd socket units.";
|
||
};
|
||
|
||
systemd.timers = mkOption {
|
||
default = {};
|
||
type = types.attrsOf types.optionSet;
|
||
options = [ timerOptions unitConfig ];
|
||
description = "Definition of systemd timer units.";
|
||
};
|
||
|
||
systemd.mounts = mkOption {
|
||
default = [];
|
||
type = types.listOf types.optionSet;
|
||
options = [ mountOptions unitConfig mountConfig ];
|
||
description = ''
|
||
Definition of systemd mount units.
|
||
This is a list instead of an attrSet, because systemd mandates the names to be derived from
|
||
the 'where' attribute.
|
||
'';
|
||
};
|
||
|
||
systemd.defaultUnit = mkOption {
|
||
default = "multi-user.target";
|
||
type = types.uniq types.string;
|
||
description = "Default unit started when the system boots.";
|
||
};
|
||
|
||
systemd.globalEnvironment = mkOption {
|
||
type = types.attrs;
|
||
default = {};
|
||
example = { TZ = "CET"; };
|
||
description = ''
|
||
Environment variables passed to <emphasis>all</emphasis> systemd units.
|
||
'';
|
||
};
|
||
|
||
services.journald.console = mkOption {
|
||
default = "";
|
||
type = types.uniq types.string;
|
||
description = "If non-empty, write log messages to the specified TTY device.";
|
||
};
|
||
|
||
services.journald.rateLimitInterval = mkOption {
|
||
default = "10s";
|
||
type = types.uniq types.string;
|
||
description = ''
|
||
Configures the rate limiting interval that is applied to all
|
||
messages generated on the system. This rate limiting is applied
|
||
per-service, so that two services which log do not interfere with
|
||
each other's limit. The value may be specified in the following
|
||
units: s, min, h, ms, us. To turn off any kind of rate limiting,
|
||
set either value to 0.
|
||
'';
|
||
};
|
||
|
||
services.journald.rateLimitBurst = mkOption {
|
||
default = 100;
|
||
type = types.uniq types.int;
|
||
description = ''
|
||
Configures the rate limiting burst limit (number of messages per
|
||
interval) that is applied to all messages generated on the system.
|
||
This rate limiting is applied per-service, so that two services
|
||
which log do not interfere with each other's limit.
|
||
'';
|
||
};
|
||
|
||
services.logind.extraConfig = mkOption {
|
||
default = "";
|
||
type = types.uniq types.string;
|
||
example = "HandleLidSwitch=ignore";
|
||
description = ''
|
||
Extra config options for systemd-logind. See man logind.conf for
|
||
available options.
|
||
'';
|
||
};
|
||
|
||
systemd.enableEmergencyMode = mkOption {
|
||
default = true;
|
||
type = types.bool;
|
||
description = ''
|
||
Whether to enable emergency mode, which is an
|
||
<command>sulogin</command> shell started on the console if
|
||
mounting a filesystem fails. Since some machines (like EC2
|
||
instances) have no console of any kind, emergency mode doesn't
|
||
make sense, and it's better to continue with the boot insofar
|
||
as possible.
|
||
'';
|
||
};
|
||
|
||
};
|
||
|
||
|
||
###### implementation
|
||
|
||
config = {
|
||
|
||
system.build.units = units;
|
||
|
||
environment.systemPackages = [ systemd ];
|
||
|
||
environment.etc."systemd/system".source = units;
|
||
|
||
environment.etc."systemd/system.conf".text =
|
||
''
|
||
[Manager]
|
||
'';
|
||
|
||
environment.etc."systemd/journald.conf".text =
|
||
''
|
||
[Journal]
|
||
RateLimitInterval=${config.services.journald.rateLimitInterval}
|
||
RateLimitBurst=${toString config.services.journald.rateLimitBurst}
|
||
${optionalString (config.services.journald.console != "") ''
|
||
ForwardToConsole=yes
|
||
TTYPath=${config.services.journald.console}
|
||
''}
|
||
'';
|
||
|
||
environment.etc."systemd/logind.conf".text =
|
||
''
|
||
[Login]
|
||
${config.services.logind.extraConfig}
|
||
'';
|
||
|
||
environment.etc."systemd/sleep.conf".text =
|
||
''
|
||
[Sleep]
|
||
'';
|
||
|
||
system.activationScripts.systemd =
|
||
''
|
||
mkdir -p /var/lib/udev -m 0755
|
||
|
||
# Regenerate the hardware database /var/lib/udev/hwdb.bin
|
||
# whenever systemd changes.
|
||
if [ ! -e /var/lib/udev/prev-systemd -o "$(readlink /var/lib/udev/prev-systemd)" != ${systemd} ]; then
|
||
echo "regenerating udev hardware database..."
|
||
${systemd}/bin/udevadm hwdb --update && ln -sfn ${systemd} /var/lib/udev/prev-systemd
|
||
fi
|
||
'';
|
||
|
||
# Target for ‘charon send-keys’ to hook into.
|
||
systemd.targets.keys =
|
||
{ description = "Security Keys";
|
||
};
|
||
|
||
systemd.units =
|
||
mapAttrs' (n: v: nameValuePair "${n}.target" (targetToUnit n v)) cfg.targets
|
||
// mapAttrs' (n: v: nameValuePair "${n}.service" (serviceToUnit n v)) cfg.services
|
||
// mapAttrs' (n: v: nameValuePair "${n}.socket" (socketToUnit n v)) cfg.sockets
|
||
// mapAttrs' (n: v: nameValuePair "${n}.timer" (timerToUnit n v)) cfg.timers
|
||
// listToAttrs (map
|
||
(v: let n = escapeSystemdPath v.where;
|
||
in nameValuePair "${n}.mount" (mountToUnit n v)) cfg.mounts);
|
||
|
||
system.requiredKernelConfig = map config.lib.kernelConfig.isEnabled [
|
||
"CGROUPS" "AUTOFS4_FS" "DEVTMPFS"
|
||
];
|
||
|
||
environment.shellAliases =
|
||
{ start = "systemctl start";
|
||
stop = "systemctl stop";
|
||
restart = "systemctl restart";
|
||
status = "systemctl status";
|
||
};
|
||
|
||
};
|
||
}
|