forked from mirrors/nixpkgs
Add support for user units
With ‘systemd.user.units’ and ‘systemd.user.services’, you can specify
units used by per-user systemd instances. For example,
systemd.user.services.foo =
{ description = "foo";
wantedBy = [ "default.target" ];
serviceConfig.ExecStart = "${pkgs.foo}/bin/foo";
};
declares a unit ‘foo.service’ that gets started automatically when the
user systemd instance starts, and is stopped when the user systemd
instance stops.
Note that there is at most one systemd instance per user: it's created
when a user logs in and there is no systemd instance for that user
yet, and it's removed when the user fully logs out (i.e. has no
sessions anymore). So if you're simultaneously logged in via X11 and a
virtual console, you get only one copy of foo.
This commit is contained in:
Eelco Dolstra
parent
073351a5cf
commit
e34a1589fe
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@ -24,7 +24,7 @@ let
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ln -s /dev/null $out/${name}
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'';
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upstreamUnits =
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upstreamSystemUnits =
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[ # Targets.
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"basic.target"
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"sysinit.target"
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@ -165,7 +165,7 @@ let
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"emergency.service"
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];
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upstreamWants =
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upstreamSystemWants =
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[ #"basic.target.wants"
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"sysinit.target.wants"
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"sockets.target.wants"
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@ -174,6 +174,17 @@ let
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"timers.target.wants"
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];
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upstreamUserUnits =
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[ "basic.target"
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"default.target"
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"exit.target"
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"paths.target"
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"shutdown.target"
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"sockets.target"
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"systemd-exit.service"
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"timers.target"
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];
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makeJobScript = name: text:
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let x = pkgs.writeTextFile { name = "unit-script"; executable = true; destination = "/bin/${name}"; inherit text; };
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in "${x}/bin/${name}";
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@ -359,13 +370,13 @@ let
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'';
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};
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units = pkgs.runCommand "units" { preferLocalBuild = true; }
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''
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generateUnits = type: units: upstreamUnits: upstreamWants:
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pkgs.runCommand "${type}-units" { preferLocalBuild = true; } ''
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mkdir -p $out
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# Copy the upstream systemd units we're interested in.
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for i in ${toString upstreamUnits}; do
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fn=${systemd}/example/systemd/system/$i
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fn=${systemd}/example/systemd/${type}/$i
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if ! [ -e $fn ]; then echo "missing $fn"; false; fi
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if [ -L $fn ]; then
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cp -pd $fn $out/
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@ -377,7 +388,7 @@ let
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# Copy .wants links, but only those that point to units that
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# we're interested in.
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for i in ${toString upstreamWants}; do
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fn=${systemd}/example/systemd/system/$i
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fn=${systemd}/example/systemd/${type}/$i
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if ! [ -e $fn ]; then echo "missing $fn"; false; fi
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x=$out/$(basename $fn)
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mkdir $x
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@ -390,14 +401,16 @@ let
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# Symlink all units provided listed in systemd.packages.
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for i in ${toString cfg.packages}; do
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ln -s $i/etc/systemd/system/* $i/lib/systemd/system/* $out/
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if [ -n "$(echo $i/etc/systemd/${type}/*)" ]; then
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ln -s $i/etc/systemd/${type}/* $i/lib/systemd/${type}/* $out/
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fi
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done
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# Symlink all units defined by systemd.units. If these are also
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# provided by systemd or systemd.packages, then add them as
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# <unit-name>.d/overrides.conf, which makes them extend the
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# upstream unit.
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for i in ${toString (mapAttrsToList (n: v: v.unit) cfg.units)}; do
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for i in ${toString (mapAttrsToList (n: v: v.unit) units)}; do
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fn=$(basename $i/*)
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if [ -e $out/$fn ]; then
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if [ "$(readlink -f $i/$fn)" = /dev/null ]; then
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@ -417,24 +430,26 @@ let
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concatMapStrings (name2: ''
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mkdir -p $out/'${name2}.wants'
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ln -sfn '../${name}' $out/'${name2}.wants'/
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'') unit.wantedBy) cfg.units)}
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'') unit.wantedBy) units)}
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${concatStrings (mapAttrsToList (name: unit:
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concatMapStrings (name2: ''
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mkdir -p $out/'${name2}.requires'
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ln -sfn '../${name}' $out/'${name2}.requires'/
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'') unit.requiredBy) cfg.units)}
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'') unit.requiredBy) units)}
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# Stupid misc. symlinks.
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ln -s ${cfg.defaultUnit} $out/default.target
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${optionalString (type == "system") ''
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# Stupid misc. symlinks.
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ln -s ${cfg.defaultUnit} $out/default.target
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ln -s rescue.target $out/kbrequest.target
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ln -s rescue.target $out/kbrequest.target
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mkdir -p $out/getty.target.wants/
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ln -s ../autovt@tty1.service $out/getty.target.wants/
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mkdir -p $out/getty.target.wants/
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ln -s ../autovt@tty1.service $out/getty.target.wants/
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ln -s ../local-fs.target ../remote-fs.target ../network.target ../nss-lookup.target \
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../nss-user-lookup.target ../swap.target $out/multi-user.target.wants/
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ln -s ../local-fs.target ../remote-fs.target ../network.target ../nss-lookup.target \
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../nss-user-lookup.target ../swap.target $out/multi-user.target.wants/
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''}
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''; # */
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in
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@ -638,6 +653,25 @@ in
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'';
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};
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systemd.user.units = mkOption {
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description = "Definition of systemd per-user units.";
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default = {};
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type = types.attrsOf types.optionSet;
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options = { name, config, ... }:
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{ options = concreteUnitOptions;
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config = {
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unit = mkDefault (makeUnit name config);
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};
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};
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};
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systemd.user.services = mkOption {
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default = {};
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type = types.attrsOf types.optionSet;
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options = [ serviceOptions unitConfig serviceConfig ];
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description = "Definition of systemd per-user service units.";
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};
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};
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@ -651,11 +685,15 @@ in
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message = "${name}: Type=oneshot services must have Restart=no";
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}) cfg.services;
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system.build.units = units;
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system.build.units = cfg.units;
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environment.systemPackages = [ systemd ];
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environment.etc."systemd/system".source = units;
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environment.etc."systemd/system".source =
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generateUnits "system" cfg.units upstreamSystemUnits upstreamSystemWants;
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environment.etc."systemd/user".source =
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generateUnits "user" cfg.user.units upstreamUserUnits [];
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environment.etc."systemd/system.conf".text =
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''
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@ -719,6 +757,9 @@ in
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(v: let n = escapeSystemdPath v.where;
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in nameValuePair "${n}.automount" (automountToUnit n v)) cfg.automounts);
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systemd.user.units =
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mapAttrs' (n: v: nameValuePair "${n}.service" (serviceToUnit n v)) cfg.user.services;
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system.requiredKernelConfig = map config.lib.kernelConfig.isEnabled [
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"CGROUPS" "AUTOFS4_FS" "DEVTMPFS"
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];
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@ -753,10 +794,6 @@ in
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startSession = true;
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};
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# Provide systemd user units. FIXME: Should make this definable,
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# just like the system units.
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environment.etc."systemd/user".source = "${systemd}/example/systemd/user";
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environment.etc."tmpfiles.d/x11.conf".source = "${systemd}/example/tmpfiles.d/x11.conf";
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environment.etc."tmpfiles.d/nixos.conf".text =
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