forked from mirrors/nixpkgs
519 lines
14 KiB
Nix
519 lines
14 KiB
Nix
{ config, lib }:
|
||
|
||
with lib;
|
||
with import ./systemd-lib.nix { inherit config lib pkgs; };
|
||
|
||
let
|
||
checkService = checkUnitConfig "Service" [
|
||
(assertValueOneOf "Type" [
|
||
"exec" "simple" "forking" "oneshot" "dbus" "notify" "idle"
|
||
])
|
||
(assertValueOneOf "Restart" [
|
||
"no" "on-success" "on-failure" "on-abnormal" "on-abort" "always"
|
||
])
|
||
];
|
||
|
||
in rec {
|
||
|
||
unitOption = mkOptionType {
|
||
name = "systemd option";
|
||
merge = loc: defs:
|
||
let
|
||
defs' = filterOverrides defs;
|
||
defs'' = getValues defs';
|
||
in
|
||
if isList (head defs'')
|
||
then concatLists defs''
|
||
else mergeOneOption loc defs';
|
||
};
|
||
|
||
sharedOptions = {
|
||
|
||
enable = mkOption {
|
||
default = true;
|
||
type = 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. Note that <literal>enable=true</literal> does not
|
||
make a unit start by default at boot; if you want that, see
|
||
<literal>wantedBy</literal>.
|
||
'';
|
||
};
|
||
|
||
requiredBy = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
Units that require (i.e. depend on and need to go down with)
|
||
this unit. The discussion under <literal>wantedBy</literal>
|
||
applies here as well: inverse <literal>.requires</literal>
|
||
symlinks are established.
|
||
'';
|
||
};
|
||
|
||
wantedBy = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
Units that want (i.e. depend on) this unit. The standard way
|
||
to make a unit start by default at boot is to set this option
|
||
to <literal>[ "multi-user.target" ]</literal>. That's despite
|
||
the fact that the systemd.unit(5) manpage says this option
|
||
goes in the <literal>[Install]</literal> section that controls
|
||
the behaviour of <literal>systemctl enable</literal>. Since
|
||
such a process is stateful and thus contrary to the design of
|
||
NixOS, setting this option instead causes the equivalent
|
||
inverse <literal>.wants</literal> symlink to be present,
|
||
establishing the same desired relationship in a stateless way.
|
||
'';
|
||
};
|
||
|
||
aliases = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = "Aliases of that unit.";
|
||
};
|
||
|
||
};
|
||
|
||
concreteUnitOptions = sharedOptions // {
|
||
|
||
text = mkOption {
|
||
type = types.nullOr types.str;
|
||
default = null;
|
||
description = "Text of this systemd unit.";
|
||
};
|
||
|
||
unit = mkOption {
|
||
internal = true;
|
||
description = "The generated unit.";
|
||
};
|
||
|
||
};
|
||
|
||
commonUnitOptions = sharedOptions // {
|
||
|
||
description = mkOption {
|
||
default = "";
|
||
type = types.str;
|
||
description = "Description of this unit used in systemd messages and progress indicators.";
|
||
};
|
||
|
||
documentation = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = "A list of URIs referencing documentation for this unit or its configuration.";
|
||
};
|
||
|
||
requires = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
Start the specified units when this unit is started, and stop
|
||
this unit when the specified units are stopped or fail.
|
||
'';
|
||
};
|
||
|
||
wants = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
Start the specified units when this unit is started.
|
||
'';
|
||
};
|
||
|
||
after = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
If the specified units are started at the same time as
|
||
this unit, delay this unit until they have started.
|
||
'';
|
||
};
|
||
|
||
before = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
If the specified units are started at the same time as
|
||
this unit, delay them until this unit has started.
|
||
'';
|
||
};
|
||
|
||
bindsTo = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
Like ‘requires’, but in addition, if the specified units
|
||
unexpectedly disappear, this unit will be stopped as well.
|
||
'';
|
||
};
|
||
|
||
partOf = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
If the specified units are stopped or restarted, then this
|
||
unit is stopped or restarted as well.
|
||
'';
|
||
};
|
||
|
||
conflicts = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
If the specified units are started, then this unit is stopped
|
||
and vice versa.
|
||
'';
|
||
};
|
||
|
||
requisite = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
Similar to requires. However if the units listed are not started,
|
||
they will not be started and the transaction will fail.
|
||
'';
|
||
};
|
||
|
||
unitConfig = mkOption {
|
||
default = {};
|
||
example = { RequiresMountsFor = "/data"; };
|
||
type = types.attrsOf unitOption;
|
||
description = ''
|
||
Each attribute in this set specifies an option in the
|
||
<literal>[Unit]</literal> section of the unit. See
|
||
<citerefentry><refentrytitle>systemd.unit</refentrytitle>
|
||
<manvolnum>5</manvolnum></citerefentry> for details.
|
||
'';
|
||
};
|
||
|
||
restartTriggers = mkOption {
|
||
default = [];
|
||
type = types.listOf types.unspecified;
|
||
description = ''
|
||
An arbitrary list of items such as derivations. If any item
|
||
in the list changes between reconfigurations, the service will
|
||
be restarted.
|
||
'';
|
||
};
|
||
|
||
onFailure = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
description = ''
|
||
A list of one or more units that are activated when
|
||
this unit enters the "failed" state.
|
||
'';
|
||
};
|
||
|
||
startLimitIntervalSec = mkOption {
|
||
type = types.int;
|
||
description = ''
|
||
Configure unit start rate limiting. Units which are started
|
||
more than burst times within an interval time interval are
|
||
not permitted to start any more.
|
||
'';
|
||
};
|
||
|
||
};
|
||
|
||
|
||
serviceOptions = commonUnitOptions // {
|
||
|
||
environment = mkOption {
|
||
default = {};
|
||
type = with types; attrsOf (nullOr (either str (either path package)));
|
||
example = { PATH = "/foo/bar/bin"; LANG = "nl_NL.UTF-8"; };
|
||
description = "Environment variables passed to the service's processes.";
|
||
};
|
||
|
||
path = mkOption {
|
||
default = [];
|
||
apply = ps: "${makeBinPath ps}:${makeSearchPathOutput "bin" "sbin" ps}";
|
||
description = ''
|
||
Packages added to the service's <envar>PATH</envar>
|
||
environment variable. Both the <filename>bin</filename>
|
||
and <filename>sbin</filename> subdirectories of each
|
||
package are added.
|
||
'';
|
||
};
|
||
|
||
serviceConfig = mkOption {
|
||
default = {};
|
||
example =
|
||
{ StartLimitInterval = 10;
|
||
RestartSec = 5;
|
||
};
|
||
type = types.addCheck (types.attrsOf unitOption) checkService;
|
||
description = ''
|
||
Each attribute in this set specifies an option in the
|
||
<literal>[Service]</literal> section of the unit. See
|
||
<citerefentry><refentrytitle>systemd.service</refentrytitle>
|
||
<manvolnum>5</manvolnum></citerefentry> for details.
|
||
'';
|
||
};
|
||
|
||
script = mkOption {
|
||
type = types.lines;
|
||
default = "";
|
||
description = "Shell commands executed as the service's main process.";
|
||
};
|
||
|
||
scriptArgs = mkOption {
|
||
type = types.str;
|
||
default = "";
|
||
description = "Arguments passed to the main process script.";
|
||
};
|
||
|
||
preStart = mkOption {
|
||
type = types.lines;
|
||
default = "";
|
||
description = ''
|
||
Shell commands executed before the service's main process
|
||
is started.
|
||
'';
|
||
};
|
||
|
||
postStart = mkOption {
|
||
type = types.lines;
|
||
default = "";
|
||
description = ''
|
||
Shell commands executed after the service's main process
|
||
is started.
|
||
'';
|
||
};
|
||
|
||
reload = mkOption {
|
||
type = types.lines;
|
||
default = "";
|
||
description = ''
|
||
Shell commands executed when the service's main process
|
||
is reloaded.
|
||
'';
|
||
};
|
||
|
||
preStop = mkOption {
|
||
type = types.lines;
|
||
default = "";
|
||
description = ''
|
||
Shell commands executed to stop the service.
|
||
'';
|
||
};
|
||
|
||
postStop = mkOption {
|
||
type = types.lines;
|
||
default = "";
|
||
description = ''
|
||
Shell commands executed after the service's main process
|
||
has exited.
|
||
'';
|
||
};
|
||
|
||
restartIfChanged = mkOption {
|
||
type = types.bool;
|
||
default = true;
|
||
description = ''
|
||
Whether the service should be restarted during a NixOS
|
||
configuration switch if its definition has changed.
|
||
'';
|
||
};
|
||
|
||
reloadIfChanged = mkOption {
|
||
type = types.bool;
|
||
default = false;
|
||
description = ''
|
||
Whether the service should be reloaded during a NixOS
|
||
configuration switch if its definition has changed. If
|
||
enabled, the value of <option>restartIfChanged</option> is
|
||
ignored.
|
||
'';
|
||
};
|
||
|
||
stopIfChanged = mkOption {
|
||
type = types.bool;
|
||
default = true;
|
||
description = ''
|
||
If set, a changed unit is restarted by calling
|
||
<command>systemctl stop</command> in the old configuration,
|
||
then <command>systemctl start</command> in the new one.
|
||
Otherwise, it is restarted in a single step using
|
||
<command>systemctl restart</command> in the new configuration.
|
||
The latter is less correct because it runs the
|
||
<literal>ExecStop</literal> commands from the new
|
||
configuration.
|
||
'';
|
||
};
|
||
|
||
startAt = mkOption {
|
||
type = with types; either str (listOf str);
|
||
default = [];
|
||
example = "Sun 14:00:00";
|
||
description = ''
|
||
Automatically start this unit at the given date/time, which
|
||
must be in the format described in
|
||
<citerefentry><refentrytitle>systemd.time</refentrytitle>
|
||
<manvolnum>7</manvolnum></citerefentry>. This is equivalent
|
||
to adding a corresponding timer unit with
|
||
<option>OnCalendar</option> set to the value given here.
|
||
'';
|
||
apply = v: if isList v then v else [ v ];
|
||
};
|
||
|
||
};
|
||
|
||
|
||
socketOptions = commonUnitOptions // {
|
||
|
||
listenStreams = mkOption {
|
||
default = [];
|
||
type = types.listOf types.str;
|
||
example = [ "0.0.0.0:993" "/run/my-socket" ];
|
||
description = ''
|
||
For each item in this list, a <literal>ListenStream</literal>
|
||
option in the <literal>[Socket]</literal> section will be created.
|
||
'';
|
||
};
|
||
|
||
socketConfig = mkOption {
|
||
default = {};
|
||
example = { ListenStream = "/run/my-socket"; };
|
||
type = types.attrsOf unitOption;
|
||
description = ''
|
||
Each attribute in this set specifies an option in the
|
||
<literal>[Socket]</literal> section of the unit. See
|
||
<citerefentry><refentrytitle>systemd.socket</refentrytitle>
|
||
<manvolnum>5</manvolnum></citerefentry> for details.
|
||
'';
|
||
};
|
||
|
||
};
|
||
|
||
|
||
timerOptions = commonUnitOptions // {
|
||
|
||
timerConfig = mkOption {
|
||
default = {};
|
||
example = { OnCalendar = "Sun 14:00:00"; Unit = "foo.service"; };
|
||
type = types.attrsOf unitOption;
|
||
description = ''
|
||
Each attribute in this set specifies an option in the
|
||
<literal>[Timer]</literal> section of the unit. See
|
||
<citerefentry><refentrytitle>systemd.timer</refentrytitle>
|
||
<manvolnum>5</manvolnum></citerefentry> and
|
||
<citerefentry><refentrytitle>systemd.time</refentrytitle>
|
||
<manvolnum>7</manvolnum></citerefentry> for details.
|
||
'';
|
||
};
|
||
|
||
};
|
||
|
||
|
||
pathOptions = commonUnitOptions // {
|
||
|
||
pathConfig = mkOption {
|
||
default = {};
|
||
example = { PathChanged = "/some/path"; Unit = "changedpath.service"; };
|
||
type = types.attrsOf unitOption;
|
||
description = ''
|
||
Each attribute in this set specifies an option in the
|
||
<literal>[Path]</literal> section of the unit. See
|
||
<citerefentry><refentrytitle>systemd.path</refentrytitle>
|
||
<manvolnum>5</manvolnum></citerefentry> for details.
|
||
'';
|
||
};
|
||
|
||
};
|
||
|
||
|
||
mountOptions = commonUnitOptions // {
|
||
|
||
what = mkOption {
|
||
example = "/dev/sda1";
|
||
type = types.str;
|
||
description = "Absolute path of device node, file or other resource. (Mandatory)";
|
||
};
|
||
|
||
where = mkOption {
|
||
example = "/mnt";
|
||
type = types.str;
|
||
description = ''
|
||
Absolute path of a directory of the mount point.
|
||
Will be created if it doesn't exist. (Mandatory)
|
||
'';
|
||
};
|
||
|
||
type = mkOption {
|
||
default = "";
|
||
example = "ext4";
|
||
type = types.str;
|
||
description = "File system type.";
|
||
};
|
||
|
||
options = mkOption {
|
||
default = "";
|
||
example = "noatime";
|
||
type = types.commas;
|
||
description = "Options used to mount the file system.";
|
||
};
|
||
|
||
mountConfig = mkOption {
|
||
default = {};
|
||
example = { DirectoryMode = "0775"; };
|
||
type = types.attrsOf unitOption;
|
||
description = ''
|
||
Each attribute in this set specifies an option in the
|
||
<literal>[Mount]</literal> section of the unit. See
|
||
<citerefentry><refentrytitle>systemd.mount</refentrytitle>
|
||
<manvolnum>5</manvolnum></citerefentry> for details.
|
||
'';
|
||
};
|
||
};
|
||
|
||
automountOptions = commonUnitOptions // {
|
||
|
||
where = mkOption {
|
||
example = "/mnt";
|
||
type = types.str;
|
||
description = ''
|
||
Absolute path of a directory of the mount point.
|
||
Will be created if it doesn't exist. (Mandatory)
|
||
'';
|
||
};
|
||
|
||
automountConfig = mkOption {
|
||
default = {};
|
||
example = { DirectoryMode = "0775"; };
|
||
type = types.attrsOf unitOption;
|
||
description = ''
|
||
Each attribute in this set specifies an option in the
|
||
<literal>[Automount]</literal> section of the unit. See
|
||
<citerefentry><refentrytitle>systemd.automount</refentrytitle>
|
||
<manvolnum>5</manvolnum></citerefentry> for details.
|
||
'';
|
||
};
|
||
};
|
||
|
||
targetOptions = commonUnitOptions;
|
||
|
||
sliceOptions = commonUnitOptions // {
|
||
|
||
sliceConfig = mkOption {
|
||
default = {};
|
||
example = { MemoryMax = "2G"; };
|
||
type = types.attrsOf unitOption;
|
||
description = ''
|
||
Each attribute in this set specifies an option in the
|
||
<literal>[Slice]</literal> section of the unit. See
|
||
<citerefentry><refentrytitle>systemd.slice</refentrytitle>
|
||
<manvolnum>5</manvolnum></citerefentry> for details.
|
||
'';
|
||
};
|
||
|
||
};
|
||
|
||
}
|