nixpkgs/modules/system/upstart/upstart.nix
Eelco Dolstra 285f587025 Move non-interface specific initialisation to ‘network-setup.service’
The unit ‘network-interface.service’ has been replaced by
‘network-interfaces.target’.
2012-10-11 16:18:48 -04:00

294 lines
8 KiB
Nix
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

{ config, pkgs, ... }:
with pkgs.lib;
with import ../boot/systemd-unit-options.nix { inherit config pkgs; };
let
userExists = u:
(u == "") || any (uu: uu.name == u) (attrValues config.users.extraUsers);
groupExists = g:
(g == "") || any (gg: gg.name == g) (attrValues config.users.extraGroups);
makeJobScript = name: content: "${pkgs.writeScriptBin name content}/bin/${name}";
# From a job description, generate an systemd unit file.
makeUnit = job:
let
hasMain = job.script != "" || job.exec != "";
env = config.system.upstartEnvironment // job.environment;
preStartScript = makeJobScript "${job.name}-pre-start.sh"
''
#! ${pkgs.stdenv.shell} -e
${job.preStart}
'';
startScript = makeJobScript "${job.name}-start.sh"
''
#! ${pkgs.stdenv.shell} -e
${if job.script != "" then job.script else ''
exec ${job.exec}
''}
'';
postStartScript = makeJobScript "${job.name}-post-start.sh"
''
#! ${pkgs.stdenv.shell} -e
${job.postStart}
'';
preStopScript = makeJobScript "${job.name}-pre-stop.sh"
''
#! ${pkgs.stdenv.shell} -e
${job.preStop}
'';
postStopScript = makeJobScript "${job.name}-post-stop.sh"
''
#! ${pkgs.stdenv.shell} -e
${job.postStop}
'';
in {
inherit (job) description requires before partOf environment path restartIfChanged unitConfig;
after =
(if job.startOn == "stopped udevtrigger" then [ "systemd-udev-settle.service" ] else
if job.startOn == "started udev" then [ "systemd-udev.service" ] else
if job.startOn == "started network-interfaces" then [ "network-interfaces.target" ] else
if job.startOn == "started networking" then [ "network.target" ] else
if job.startOn == "ip-up" then [] else
if job.startOn == "" || job.startOn == "startup" then [] else
builtins.trace "Warning: job ${job.name} has unknown startOn value ${job.startOn}." []
) ++ job.after;
wants =
(if job.startOn == "stopped udevtrigger" then [ "systemd-udev-settle.service" ] else []
) ++ job.wants;
wantedBy =
(if job.startOn == "" then [] else
if job.startOn == "ip-up" then [ "ip-up.target" ] else
[ "multi-user.target" ]) ++ job.wantedBy;
serviceConfig =
job.serviceConfig
// optionalAttrs (job.preStart != "" && (job.script != "" || job.exec != ""))
{ ExecStartPre = preStartScript; }
// optionalAttrs (job.preStart != "" && job.script == "" && job.exec == "")
{ ExecStart = preStartScript; }
// optionalAttrs (job.script != "" || job.exec != "")
{ ExecStart = startScript; }
// optionalAttrs (job.postStart != "")
{ ExecStartPost = postStartScript; }
// optionalAttrs (job.preStop != "")
{ ExecStop = preStopScript; }
// optionalAttrs (job.postStop != "")
{ ExecStopPost = postStopScript; }
// (if job.script == "" && job.exec == "" then { Type = "oneshot"; RemainAfterExit = true; } else
if job.daemonType == "fork" then { Type = "forking"; GuessMainPID = true; } else
if job.daemonType == "none" then { } else
throw "invalid daemon type `${job.daemonType}'")
// optionalAttrs (!job.task && job.respawn)
{ Restart = "always"; };
};
jobOptions = serviceOptions // {
name = mkOption {
# !!! The type should ensure that this could be a filename.
type = types.string;
example = "sshd";
description = ''
Name of the Upstart job.
'';
};
startOn = mkOption {
# !!! Re-enable this once we're on Upstart >= 0.6.
#type = types.string;
default = "";
description = ''
The Upstart event that triggers this job to be started.
If empty, the job will not start automatically.
'';
};
stopOn = mkOption {
type = types.string;
default = "starting shutdown";
description = ''
The Upstart event that triggers this job to be stopped.
'';
};
postStart = mkOption {
type = types.string;
default = "";
description = ''
Shell commands executed after the job is started (i.e. after
the job's main process is started), but before the job is
considered running.
'';
};
preStop = mkOption {
type = types.string;
default = "";
description = ''
Shell commands executed before the job is stopped
(i.e. before Upstart kills the job's main process). This can
be used to cleanly shut down a daemon.
'';
};
postStop = mkOption {
type = types.string;
default = "";
description = ''
Shell commands executed after the job has stopped
(i.e. after the job's main process has terminated).
'';
};
exec = mkOption {
type = types.string;
default = "";
description = ''
Command to start the job's main process. If empty, the
job has no main process, but can still have pre/post-start
and pre/post-stop scripts, and is considered running
until it is stopped.
'';
};
respawn = mkOption {
type = types.bool;
default = true;
description = ''
Whether to restart the job automatically if its process
ends unexpectedly.
'';
};
task = mkOption {
type = types.bool;
default = false;
description = ''
Whether this job is a task rather than a service. Tasks
are executed only once, while services are restarted when
they exit.
'';
};
daemonType = mkOption {
type = types.string;
default = "none";
description = ''
Determines how Upstart detects when a daemon should be
considered running. The value <literal>none</literal> means
that the daemon is considered ready immediately. The value
<literal>fork</literal> means that the daemon will fork once.
The value <literal>daemon</literal> means that the daemon will
fork twice. The value <literal>stop</literal> means that the
daemon will raise the SIGSTOP signal to indicate readiness.
'';
};
setuid = mkOption {
type = types.string;
check = userExists;
default = "";
description = ''
Run the daemon as a different user.
'';
};
setgid = mkOption {
type = types.string;
check = groupExists;
default = "";
description = ''
Run the daemon as a different group.
'';
};
path = mkOption {
default = [];
description = ''
Packages added to the job's <envar>PATH</envar> environment variable.
Both the <filename>bin</filename> and <filename>sbin</filename>
subdirectories of each package are added.
'';
};
};
upstartJob = { name, config, ... }: {
options = {
unit = mkOption {
default = makeUnit config;
description = "Generated definition of the systemd unit corresponding to this job.";
};
};
config = {
# The default name is the name extracted from the attribute path.
name = mkDefaultValue name;
};
};
in
{
###### interface
options = {
jobs = mkOption {
default = {};
description = ''
This option defines the system jobs started and managed by the
Upstart daemon.
'';
type = types.loaOf types.optionSet;
options = [ jobOptions upstartJob ];
};
system.upstartEnvironment = mkOption {
type = types.attrs;
default = {};
example = { TZ = "CET"; };
description = ''
Environment variables passed to <emphasis>all</emphasis> Upstart jobs.
'';
};
};
###### implementation
config = {
boot.systemd.services =
flip mapAttrs' config.jobs (name: job:
nameValuePair job.name job.unit);
};
}