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nixpkgs/nixos/modules/system/boot/systemd.nix
Silvan Mosberger 5acd168425
Merge pull request #59827 from oxij/nixos/suppress-systemd-units
nixos/systemd: add an option to suppress system units
2020-02-06 18:11:01 +01:00

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{ config, lib, pkgs, utils, ... }:
with utils;
with lib;
with import ./systemd-unit-options.nix { inherit config lib; };
with import ./systemd-lib.nix { inherit config lib pkgs; };
let
cfg = config.systemd;
systemd = cfg.package;
upstreamSystemUnits =
[ # Targets.
"basic.target"
"sysinit.target"
"sockets.target"
"exit.target"
"graphical.target"
"multi-user.target"
"network.target"
"network-pre.target"
"network-online.target"
"nss-lookup.target"
"nss-user-lookup.target"
"time-sync.target"
#"cryptsetup.target"
"sigpwr.target"
"timers.target"
"paths.target"
"rpcbind.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"
# hwdb.bin is managed by NixOS
# "systemd-hwdb-update.service"
# Consoles.
"getty.target"
"getty-pre.target"
"getty@.service"
"serial-getty@.service"
"console-getty.service"
"container-getty@.service"
"systemd-vconsole-setup.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-user-sessions.service"
"dbus-org.freedesktop.import1.service"
"dbus-org.freedesktop.machine1.service"
"user@.service"
"user-runtime-dir@.service"
# Journal.
"systemd-journald.socket"
"systemd-journald.service"
"systemd-journal-flush.service"
"systemd-journal-catalog-update.service"
"systemd-journald-audit.socket"
"systemd-journald-dev-log.socket"
"syslog.socket"
# Coredumps.
"systemd-coredump.socket"
"systemd-coredump@.service"
# SysV init compatibility.
"systemd-initctl.socket"
"systemd-initctl.service"
# Kernel module loading.
"systemd-modules-load.service"
"kmod-static-nodes.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"
# Maintaining state across reboots.
"systemd-random-seed.service"
"systemd-backlight@.service"
"systemd-rfkill.service"
"systemd-rfkill.socket"
# Hibernate / suspend.
"hibernate.target"
"suspend.target"
"suspend-then-hibernate.target"
"sleep.target"
"hybrid-sleep.target"
"systemd-hibernate.service"
"systemd-hybrid-sleep.service"
"systemd-suspend.service"
"systemd-suspend-then-hibernate.service"
# Reboot stuff.
"reboot.target"
"systemd-reboot.service"
"poweroff.target"
"systemd-poweroff.service"
"halt.target"
"systemd-halt.service"
"shutdown.target"
"umount.target"
"final.target"
"kexec.target"
"systemd-kexec.service"
"systemd-update-utmp.service"
# Password entry.
"systemd-ask-password-console.path"
"systemd-ask-password-console.service"
"systemd-ask-password-wall.path"
"systemd-ask-password-wall.service"
# Slices / containers.
"slices.target"
"user.slice"
"machine.slice"
"machines.target"
"systemd-importd.service"
"systemd-machined.service"
"systemd-nspawn@.service"
# Temporary file creation / cleanup.
"systemd-tmpfiles-clean.service"
"systemd-tmpfiles-clean.timer"
"systemd-tmpfiles-setup.service"
"systemd-tmpfiles-setup-dev.service"
# Misc.
"systemd-sysctl.service"
"dbus-org.freedesktop.timedate1.service"
"dbus-org.freedesktop.locale1.service"
"dbus-org.freedesktop.hostname1.service"
"systemd-timedated.service"
"systemd-localed.service"
"systemd-hostnamed.service"
"systemd-binfmt.service"
"systemd-exit.service"
"systemd-update-done.service"
] ++ optionals config.services.journald.enableHttpGateway [
"systemd-journal-gatewayd.socket"
"systemd-journal-gatewayd.service"
] ++ cfg.additionalUpstreamSystemUnits;
upstreamSystemWants =
[ "sysinit.target.wants"
"sockets.target.wants"
"local-fs.target.wants"
"multi-user.target.wants"
"timers.target.wants"
];
upstreamUserUnits =
[ "basic.target"
"bluetooth.target"
"default.target"
"exit.target"
"graphical-session-pre.target"
"graphical-session.target"
"paths.target"
"printer.target"
"shutdown.target"
"smartcard.target"
"sockets.target"
"sound.target"
"systemd-exit.service"
"systemd-tmpfiles-clean.service"
"systemd-tmpfiles-clean.timer"
"systemd-tmpfiles-setup.service"
"timers.target"
];
makeJobScript = name: text:
let mkScriptName = s: "unit-script-" + (replaceChars [ "\\" "@" ] [ "-" "_" ] (shellEscape s) );
in pkgs.writeTextFile { name = mkScriptName name; executable = true; inherit text; };
unitConfig = { config, options, ... }: {
config = {
unitConfig =
optionalAttrs (config.requires != [])
{ Requires = toString config.requires; }
// optionalAttrs (config.wants != [])
{ Wants = toString config.wants; }
// optionalAttrs (config.after != [])
{ After = toString config.after; }
// optionalAttrs (config.before != [])
{ Before = toString config.before; }
// optionalAttrs (config.bindsTo != [])
{ BindsTo = toString config.bindsTo; }
// optionalAttrs (config.partOf != [])
{ PartOf = toString config.partOf; }
// optionalAttrs (config.conflicts != [])
{ Conflicts = toString config.conflicts; }
// optionalAttrs (config.requisite != [])
{ Requisite = toString config.requisite; }
// optionalAttrs (config.restartTriggers != [])
{ X-Restart-Triggers = toString config.restartTriggers; }
// optionalAttrs (config.description != "") {
Description = config.description; }
// optionalAttrs (config.documentation != []) {
Documentation = toString config.documentation; }
// optionalAttrs (config.onFailure != []) {
OnFailure = toString config.onFailure; }
// optionalAttrs (options.startLimitIntervalSec.isDefined) {
StartLimitIntervalSec = toString config.startLimitIntervalSec;
};
};
};
serviceConfig = { name, config, ... }: {
config = mkMerge
[ { # Default path for systemd services. Should be quite minimal.
path = mkAfter
[ pkgs.coreutils
pkgs.findutils
pkgs.gnugrep
pkgs.gnused
systemd
];
environment.PATH = config.path;
}
(mkIf (config.preStart != "")
{ serviceConfig.ExecStartPre = makeJobScript "${name}-pre-start" ''
#! ${pkgs.runtimeShell} -e
${config.preStart}
'';
})
(mkIf (config.script != "")
{ serviceConfig.ExecStart = makeJobScript "${name}-start" ''
#! ${pkgs.runtimeShell} -e
${config.script}
'' + " " + config.scriptArgs;
})
(mkIf (config.postStart != "")
{ serviceConfig.ExecStartPost = makeJobScript "${name}-post-start" ''
#! ${pkgs.runtimeShell} -e
${config.postStart}
'';
})
(mkIf (config.reload != "")
{ serviceConfig.ExecReload = makeJobScript "${name}-reload" ''
#! ${pkgs.runtimeShell} -e
${config.reload}
'';
})
(mkIf (config.preStop != "")
{ serviceConfig.ExecStop = makeJobScript "${name}-pre-stop" ''
#! ${pkgs.runtimeShell} -e
${config.preStop}
'';
})
(mkIf (config.postStop != "")
{ serviceConfig.ExecStopPost = makeJobScript "${name}-post-stop" ''
#! ${pkgs.runtimeShell} -e
${config.postStop}
'';
})
];
};
mountConfig = { config, ... }: {
config = {
mountConfig =
{ What = config.what;
Where = config.where;
} // optionalAttrs (config.type != "") {
Type = config.type;
} // optionalAttrs (config.options != "") {
Options = config.options;
};
};
};
automountConfig = { config, ... }: {
config = {
automountConfig =
{ Where = config.where;
};
};
};
commonUnitText = def: ''
[Unit]
${attrsToSection def.unitConfig}
'';
targetToUnit = name: def:
{ inherit (def) aliases wantedBy requiredBy enable;
text =
''
[Unit]
${attrsToSection def.unitConfig}
'';
};
serviceToUnit = name: def:
{ inherit (def) aliases wantedBy requiredBy enable;
text = commonUnitText def +
''
[Service]
${let env = cfg.globalEnvironment // def.environment;
in concatMapStrings (n:
let s = optionalString (env.${n} != null)
"Environment=${builtins.toJSON "${n}=${env.${n}}"}\n";
# systemd max line length is now 1MiB
# https://github.com/systemd/systemd/commit/e6dde451a51dc5aaa7f4d98d39b8fe735f73d2af
in if stringLength s >= 1048576 then throw "The value of the environment variable ${n} in systemd service ${name}.service is too long." else s) (attrNames env)}
${if def.reloadIfChanged then ''
X-ReloadIfChanged=true
'' else if !def.restartIfChanged then ''
X-RestartIfChanged=false
'' else ""}
${optionalString (!def.stopIfChanged) "X-StopIfChanged=false"}
${attrsToSection def.serviceConfig}
'';
};
socketToUnit = name: def:
{ inherit (def) aliases wantedBy requiredBy enable;
text = commonUnitText def +
''
[Socket]
${attrsToSection def.socketConfig}
${concatStringsSep "\n" (map (s: "ListenStream=${s}") def.listenStreams)}
'';
};
timerToUnit = name: def:
{ inherit (def) aliases wantedBy requiredBy enable;
text = commonUnitText def +
''
[Timer]
${attrsToSection def.timerConfig}
'';
};
pathToUnit = name: def:
{ inherit (def) aliases wantedBy requiredBy enable;
text = commonUnitText def +
''
[Path]
${attrsToSection def.pathConfig}
'';
};
mountToUnit = name: def:
{ inherit (def) aliases wantedBy requiredBy enable;
text = commonUnitText def +
''
[Mount]
${attrsToSection def.mountConfig}
'';
};
automountToUnit = name: def:
{ inherit (def) aliases wantedBy requiredBy enable;
text = commonUnitText def +
''
[Automount]
${attrsToSection def.automountConfig}
'';
};
sliceToUnit = name: def:
{ inherit (def) aliases wantedBy requiredBy enable;
text = commonUnitText def +
''
[Slice]
${attrsToSection def.sliceConfig}
'';
};
logindHandlerType = types.enum [
"ignore" "poweroff" "reboot" "halt" "kexec" "suspend"
"hibernate" "hybrid-sleep" "suspend-then-hibernate" "lock"
];
in
{
###### interface
options = {
systemd.package = mkOption {
default = pkgs.systemd;
defaultText = "pkgs.systemd";
type = types.package;
description = "The systemd package.";
};
systemd.units = mkOption {
description = "Definition of systemd units.";
default = {};
type = with types; attrsOf (submodule (
{ name, config, ... }:
{ options = concreteUnitOptions;
config = {
unit = mkDefault (makeUnit name config);
};
}));
};
systemd.packages = mkOption {
default = [];
type = types.listOf types.package;
example = literalExample "[ pkgs.systemd-cryptsetup-generator ]";
description = "Packages providing systemd units and hooks.";
};
systemd.targets = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = targetOptions; } unitConfig] );
description = "Definition of systemd target units.";
};
systemd.services = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = serviceOptions; } unitConfig serviceConfig ]);
description = "Definition of systemd service units.";
};
systemd.sockets = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = socketOptions; } unitConfig ]);
description = "Definition of systemd socket units.";
};
systemd.timers = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = timerOptions; } unitConfig ]);
description = "Definition of systemd timer units.";
};
systemd.paths = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = pathOptions; } unitConfig ]);
description = "Definition of systemd path units.";
};
systemd.mounts = mkOption {
default = [];
type = with types; listOf (submodule [ { 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.automounts = mkOption {
default = [];
type = with types; listOf (submodule [ { options = automountOptions; } unitConfig automountConfig ]);
description = ''
Definition of systemd automount units.
This is a list instead of an attrSet, because systemd mandates the names to be derived from
the 'where' attribute.
'';
};
systemd.slices = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = sliceOptions; } unitConfig] );
description = "Definition of slice configurations.";
};
systemd.generators = mkOption {
type = types.attrsOf types.path;
default = {};
example = { systemd-gpt-auto-generator = "/dev/null"; };
description = ''
Definition of systemd generators.
For each <literal>NAME = VALUE</literal> pair of the attrSet, a link is generated from
<literal>/etc/systemd/system-generators/NAME</literal> to <literal>VALUE</literal>.
'';
};
systemd.shutdown = mkOption {
type = types.attrsOf types.path;
default = {};
description = ''
Definition of systemd shutdown executables.
For each <literal>NAME = VALUE</literal> pair of the attrSet, a link is generated from
<literal>/etc/systemd/system-shutdown/NAME</literal> to <literal>VALUE</literal>.
'';
};
systemd.defaultUnit = mkOption {
default = "multi-user.target";
type = types.str;
description = "Default unit started when the system boots.";
};
systemd.ctrlAltDelUnit = mkOption {
default = "reboot.target";
type = types.str;
example = "poweroff.target";
description = ''
Target that should be started when Ctrl-Alt-Delete is pressed.
'';
};
systemd.globalEnvironment = mkOption {
type = with types; attrsOf (nullOr (oneOf [ str path package ]));
default = {};
example = { TZ = "CET"; };
description = ''
Environment variables passed to <emphasis>all</emphasis> systemd units.
'';
};
systemd.enableCgroupAccounting = mkOption {
default = true;
type = types.bool;
description = ''
Whether to enable cgroup accounting.
'';
};
systemd.coredump.enable = mkOption {
default = true;
type = types.bool;
description = ''
Whether core dumps should be processed by
<command>systemd-coredump</command>. If disabled, core dumps
appear in the current directory of the crashing process.
'';
};
systemd.coredump.extraConfig = mkOption {
default = "";
type = types.lines;
example = "Storage=journal";
description = ''
Extra config options for systemd-coredump. See coredump.conf(5) man page
for available options.
'';
};
systemd.extraConfig = mkOption {
default = "";
type = types.lines;
example = "DefaultLimitCORE=infinity";
description = ''
Extra config options for systemd. See man systemd-system.conf for
available options.
'';
};
services.journald.console = mkOption {
default = "";
type = types.str;
description = "If non-empty, write log messages to the specified TTY device.";
};
services.journald.rateLimitInterval = mkOption {
default = "30s";
type = types.str;
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 = 1000;
type = 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.journald.extraConfig = mkOption {
default = "";
type = types.lines;
example = "Storage=volatile";
description = ''
Extra config options for systemd-journald. See man journald.conf
for available options.
'';
};
services.journald.enableHttpGateway = mkOption {
default = false;
type = types.bool;
description = ''
Whether to enable the HTTP gateway to the journal.
'';
};
services.journald.forwardToSyslog = mkOption {
default = config.services.rsyslogd.enable || config.services.syslog-ng.enable;
defaultText = "services.rsyslogd.enable || services.syslog-ng.enable";
type = types.bool;
description = ''
Whether to forward log messages to syslog.
'';
};
services.logind.extraConfig = mkOption {
default = "";
type = types.lines;
example = "IdleAction=lock";
description = ''
Extra config options for systemd-logind. See
<link xlink:href="https://www.freedesktop.org/software/systemd/man/logind.conf.html">
logind.conf(5)</link> for available options.
'';
};
services.logind.killUserProcesses = mkOption {
default = false;
type = types.bool;
description = ''
Specifies whether the processes of a user should be killed
when the user logs out. If true, the scope unit corresponding
to the session and all processes inside that scope will be
terminated. If false, the scope is "abandoned" (see
<link xlink:href="https://www.freedesktop.org/software/systemd/man/systemd.scope.html#">
systemd.scope(5)</link>), and processes are not killed.
</para>
<para>
See <link xlink:href="https://www.freedesktop.org/software/systemd/man/logind.conf.html#KillUserProcesses=">logind.conf(5)</link>
for more details.
'';
};
services.logind.lidSwitch = mkOption {
default = "suspend";
example = "ignore";
type = logindHandlerType;
description = ''
Specifies what to be done when the laptop lid is closed.
'';
};
services.logind.lidSwitchDocked = mkOption {
default = "ignore";
example = "suspend";
type = logindHandlerType;
description = ''
Specifies what to be done when the laptop lid is closed
and another screen is added.
'';
};
services.logind.lidSwitchExternalPower = mkOption {
default = config.services.logind.lidSwitch;
defaultText = "services.logind.lidSwitch";
example = "ignore";
type = logindHandlerType;
description = ''
Specifies what to do when the laptop lid is closed and the system is
on external power. By default use the same action as specified in
services.logind.lidSwitch.
'';
};
systemd.sleep.extraConfig = mkOption {
default = "";
type = types.lines;
example = "HibernateDelaySec=1h";
description = ''
Extra config options for systemd sleep state logic.
See sleep.conf.d(5) man page for available options.
'';
};
systemd.user.extraConfig = mkOption {
default = "";
type = types.lines;
example = "DefaultCPUAccounting=yes";
description = ''
Extra config options for systemd user instances. See man systemd-user.conf for
available options.
'';
};
systemd.tmpfiles.rules = mkOption {
type = types.listOf types.str;
default = [];
example = [ "d /tmp 1777 root root 10d" ];
description = ''
Rules for creating and cleaning up temporary files
automatically. See
<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for the exact format.
'';
};
systemd.user.units = mkOption {
description = "Definition of systemd per-user units.";
default = {};
type = with types; attrsOf (submodule (
{ name, config, ... }:
{ options = concreteUnitOptions;
config = {
unit = mkDefault (makeUnit name config);
};
}));
};
systemd.user.paths = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = pathOptions; } unitConfig ]);
description = "Definition of systemd per-user path units.";
};
systemd.user.services = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = serviceOptions; } unitConfig serviceConfig ] );
description = "Definition of systemd per-user service units.";
};
systemd.user.slices = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = sliceOptions; } unitConfig ] );
description = "Definition of systemd per-user slice units.";
};
systemd.user.sockets = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = socketOptions; } unitConfig ] );
description = "Definition of systemd per-user socket units.";
};
systemd.user.targets = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = targetOptions; } unitConfig] );
description = "Definition of systemd per-user target units.";
};
systemd.user.timers = mkOption {
default = {};
type = with types; attrsOf (submodule [ { options = timerOptions; } unitConfig ] );
description = "Definition of systemd per-user timer units.";
};
systemd.additionalUpstreamSystemUnits = mkOption {
default = [ ];
type = types.listOf types.str;
example = [ "debug-shell.service" "systemd-quotacheck.service" ];
description = ''
Additional units shipped with systemd that shall be enabled.
'';
};
systemd.suppressedSystemUnits = mkOption {
default = [ ];
type = types.listOf types.str;
example = [ "systemd-backlight@.service" ];
description = ''
A list of units to suppress when generating system systemd configuration directory. This has
priority over upstream units, <option>systemd.units</option>, and
<option>systemd.additionalUpstreamSystemUnits</option>. The main purpose of this is to
suppress a upstream systemd unit with any modifications made to it by other NixOS modules.
'';
};
};
###### implementation
config = {
warnings = concatLists (mapAttrsToList (name: service:
optional (service.serviceConfig.Type or "" == "oneshot" && service.serviceConfig.Restart or "no" != "no")
"Service ${name}.service with Type=oneshot must have Restart=no") cfg.services);
system.build.units = cfg.units;
environment.systemPackages = [ systemd ];
environment.etc = let
# generate contents for /etc/systemd/system-${type} from attrset of links and packages
hooks = type: links: pkgs.runCommand "system-${type}" {
preferLocalBuild = true;
packages = cfg.packages;
} ''
set -e
mkdir -p $out
for package in $packages
do
for hook in $package/lib/systemd/system-${type}/*
do
ln -s $hook $out/
done
done
${concatStrings (mapAttrsToList (exec: target: "ln -s ${target} $out/${exec};\n") links)}
'';
enabledUpstreamSystemUnits = filter (n: ! elem n cfg.suppressedSystemUnits) upstreamSystemUnits;
enabledUnits = filterAttrs (n: v: ! elem n cfg.suppressedSystemUnits) cfg.units;
in ({
"systemd/system".source = generateUnits "system" enabledUnits enabledUpstreamSystemUnits upstreamSystemWants;
"systemd/user".source = generateUnits "user" cfg.user.units upstreamUserUnits [];
"systemd/system.conf".text = ''
[Manager]
${optionalString config.systemd.enableCgroupAccounting ''
DefaultCPUAccounting=yes
DefaultBlockIOAccounting=yes
DefaultIOAccounting=yes
DefaultBlockIOAccounting=yes
DefaultIPAccounting=yes
''}
DefaultLimitCORE=infinity
${config.systemd.extraConfig}
'';
"systemd/user.conf".text = ''
[Manager]
${config.systemd.user.extraConfig}
'';
"systemd/journald.conf".text = ''
[Journal]
Storage=persistent
RateLimitInterval=${config.services.journald.rateLimitInterval}
RateLimitBurst=${toString config.services.journald.rateLimitBurst}
${optionalString (config.services.journald.console != "") ''
ForwardToConsole=yes
TTYPath=${config.services.journald.console}
''}
${optionalString (config.services.journald.forwardToSyslog) ''
ForwardToSyslog=yes
''}
${config.services.journald.extraConfig}
'';
"systemd/coredump.conf".text =
''
[Coredump]
${config.systemd.coredump.extraConfig}
'';
"systemd/logind.conf".text = ''
[Login]
KillUserProcesses=${if config.services.logind.killUserProcesses then "yes" else "no"}
HandleLidSwitch=${config.services.logind.lidSwitch}
HandleLidSwitchDocked=${config.services.logind.lidSwitchDocked}
HandleLidSwitchExternalPower=${config.services.logind.lidSwitchExternalPower}
${config.services.logind.extraConfig}
'';
"systemd/sleep.conf".text = ''
[Sleep]
${config.systemd.sleep.extraConfig}
'';
# install provided sysctl snippets
"sysctl.d/50-coredump.conf".source = "${systemd}/example/sysctl.d/50-coredump.conf";
"sysctl.d/50-default.conf".source = "${systemd}/example/sysctl.d/50-default.conf";
"tmpfiles.d/home.conf".source = "${systemd}/example/tmpfiles.d/home.conf";
"tmpfiles.d/journal-nocow.conf".source = "${systemd}/example/tmpfiles.d/journal-nocow.conf";
"tmpfiles.d/portables.conf".source = "${systemd}/example/tmpfiles.d/portables.conf";
"tmpfiles.d/static-nodes-permissions.conf".source = "${systemd}/example/tmpfiles.d/static-nodes-permissions.conf";
"tmpfiles.d/systemd.conf".source = "${systemd}/example/tmpfiles.d/systemd.conf";
"tmpfiles.d/systemd-nologin.conf".source = "${systemd}/example/tmpfiles.d/systemd-nologin.conf";
"tmpfiles.d/systemd-nspawn.conf".source = "${systemd}/example/tmpfiles.d/systemd-nspawn.conf";
"tmpfiles.d/systemd-tmp.conf".source = "${systemd}/example/tmpfiles.d/systemd-tmp.conf";
"tmpfiles.d/tmp.conf".source = "${systemd}/example/tmpfiles.d/tmp.conf";
"tmpfiles.d/var.conf".source = "${systemd}/example/tmpfiles.d/var.conf";
"tmpfiles.d/x11.conf".source = "${systemd}/example/tmpfiles.d/x11.conf";
"tmpfiles.d/nixos.conf".text = ''
# This file is created automatically and should not be modified.
# Please change the option systemd.tmpfiles.rules instead.
${concatStringsSep "\n" cfg.tmpfiles.rules}
'';
"systemd/system-generators" = { source = hooks "generators" cfg.generators; };
"systemd/system-shutdown" = { source = hooks "shutdown" cfg.shutdown; };
});
services.dbus.enable = true;
users.users.systemd-network.uid = config.ids.uids.systemd-network;
users.groups.systemd-network.gid = config.ids.gids.systemd-network;
users.users.systemd-resolve.uid = config.ids.uids.systemd-resolve;
users.groups.systemd-resolve.gid = config.ids.gids.systemd-resolve;
# Target for charon send-keys to hook into.
users.groups.keys.gid = config.ids.gids.keys;
systemd.targets.keys =
{ description = "Security Keys";
unitConfig.X-StopOnReconfiguration = true;
};
systemd.units =
mapAttrs' (n: v: nameValuePair "${n}.path" (pathToUnit n v)) cfg.paths
// mapAttrs' (n: v: nameValuePair "${n}.service" (serviceToUnit n v)) cfg.services
// mapAttrs' (n: v: nameValuePair "${n}.slice" (sliceToUnit n v)) cfg.slices
// mapAttrs' (n: v: nameValuePair "${n}.socket" (socketToUnit n v)) cfg.sockets
// mapAttrs' (n: v: nameValuePair "${n}.target" (targetToUnit n v)) cfg.targets
// 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)
// listToAttrs (map
(v: let n = escapeSystemdPath v.where;
in nameValuePair "${n}.automount" (automountToUnit n v)) cfg.automounts);
systemd.user.units =
mapAttrs' (n: v: nameValuePair "${n}.path" (pathToUnit n v)) cfg.user.paths
// mapAttrs' (n: v: nameValuePair "${n}.service" (serviceToUnit n v)) cfg.user.services
// mapAttrs' (n: v: nameValuePair "${n}.slice" (sliceToUnit n v)) cfg.user.slices
// mapAttrs' (n: v: nameValuePair "${n}.socket" (socketToUnit n v)) cfg.user.sockets
// mapAttrs' (n: v: nameValuePair "${n}.target" (targetToUnit n v)) cfg.user.targets
// mapAttrs' (n: v: nameValuePair "${n}.timer" (timerToUnit n v)) cfg.user.timers;
system.requiredKernelConfig = map config.lib.kernelConfig.isEnabled
[ "DEVTMPFS" "CGROUPS" "INOTIFY_USER" "SIGNALFD" "TIMERFD" "EPOLL" "NET"
"SYSFS" "PROC_FS" "FHANDLE" "CRYPTO_USER_API_HASH" "CRYPTO_HMAC"
"CRYPTO_SHA256" "DMIID" "AUTOFS4_FS" "TMPFS_POSIX_ACL"
"TMPFS_XATTR" "SECCOMP"
];
users.groups.systemd-journal.gid = config.ids.gids.systemd-journal;
users.users.systemd-journal-gateway.uid = config.ids.uids.systemd-journal-gateway;
users.groups.systemd-journal-gateway.gid = config.ids.gids.systemd-journal-gateway;
# Generate timer units for all services that have a startAt value.
systemd.timers =
mapAttrs (name: service:
{ wantedBy = [ "timers.target" ];
timerConfig.OnCalendar = service.startAt;
})
(filterAttrs (name: service: service.enable && service.startAt != []) cfg.services);
# Generate timer units for all services that have a startAt value.
systemd.user.timers =
mapAttrs (name: service:
{ wantedBy = [ "timers.target" ];
timerConfig.OnCalendar = service.startAt;
})
(filterAttrs (name: service: service.startAt != []) cfg.user.services);
systemd.sockets.systemd-journal-gatewayd.wantedBy =
optional config.services.journald.enableHttpGateway "sockets.target";
# Provide the systemd-user PAM service, required to run systemd
# user instances.
security.pam.services.systemd-user =
{ # Ensure that pam_systemd gets included. This is special-cased
# in systemd to provide XDG_RUNTIME_DIR.
startSession = true;
};
# Some overrides to upstream units.
systemd.services."systemd-backlight@".restartIfChanged = false;
systemd.services."systemd-fsck@".restartIfChanged = false;
systemd.services."systemd-fsck@".path = [ config.system.path ];
systemd.services."user@".restartIfChanged = false;
systemd.services.systemd-journal-flush.restartIfChanged = false;
systemd.services.systemd-random-seed.restartIfChanged = false;
systemd.services.systemd-remount-fs.restartIfChanged = false;
systemd.services.systemd-update-utmp.restartIfChanged = false;
systemd.services.systemd-user-sessions.restartIfChanged = false; # Restart kills all active sessions.
systemd.services.systemd-udev-settle.restartIfChanged = false; # Causes long delays in nixos-rebuild
# Restarting systemd-logind breaks X11
# - upstream commit: https://cgit.freedesktop.org/xorg/xserver/commit/?id=dc48bd653c7e101
# - systemd announcement: https://github.com/systemd/systemd/blob/22043e4317ecd2bc7834b48a6d364de76bb26d91/NEWS#L103-L112
# - this might be addressed in the future by xorg
#systemd.services.systemd-logind.restartTriggers = [ config.environment.etc."systemd/logind.conf".source ];
systemd.services.systemd-logind.restartIfChanged = false;
systemd.services.systemd-logind.stopIfChanged = false;
# The user-runtime-dir@ service is managed by systemd-logind we should not touch it or else we break the users' sessions.
systemd.services."user-runtime-dir@".stopIfChanged = false;
systemd.services."user-runtime-dir@".restartIfChanged = false;
systemd.services.systemd-journald.restartTriggers = [ config.environment.etc."systemd/journald.conf".source ];
systemd.services.systemd-journald.stopIfChanged = false;
systemd.targets.local-fs.unitConfig.X-StopOnReconfiguration = true;
systemd.targets.remote-fs.unitConfig.X-StopOnReconfiguration = true;
systemd.targets.network-online.wantedBy = [ "multi-user.target" ];
systemd.services.systemd-binfmt.wants = [ "proc-sys-fs-binfmt_misc.mount" ];
# Don't bother with certain units in containers.
systemd.services.systemd-remount-fs.unitConfig.ConditionVirtualization = "!container";
systemd.services.systemd-random-seed.unitConfig.ConditionVirtualization = "!container";
boot.kernel.sysctl = mkIf (!cfg.coredump.enable) {
"kernel.core_pattern" = "core";
};
};
# FIXME: Remove these eventually.
imports =
[ (mkRenamedOptionModule [ "boot" "systemd" "sockets" ] [ "systemd" "sockets" ])
(mkRenamedOptionModule [ "boot" "systemd" "targets" ] [ "systemd" "targets" ])
(mkRenamedOptionModule [ "boot" "systemd" "services" ] [ "systemd" "services" ])
(mkRenamedOptionModule [ "jobs" ] [ "systemd" "services" ])
(mkRemovedOptionModule [ "systemd" "generator-packages" ] "Use systemd.packages instead.")
];
}