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{ lib, config, pkgs, ... }:
let
cfg = config.services.gomuks-web;
dataDir = "/var/lib/private/gomuks-web";
settingsFile = "${dataDir}/config/config.yaml";
settingsFileUnsubstituted = settingsFormat.generate "gomuks-web-config-unsubstituted.json" cfg.settings;
settingsFormat = pkgs.formats.json { };
in {
options.services.gomuks-web = {
enable = lib.mkEnableOption "gomuks-web";
settings = lib.mkOption {
type = settingsFormat.type;
default = {};
};
environmentFile = lib.mkOption {
type = lib.types.nullOr lib.types.path;
default = null;
};
serviceDependencies = lib.mkOption {
type = lib.types.listOf lib.types.str;
default = [];
};
};
config = lib.mkIf cfg.enable {
systemd.services.gomuks-web = {
description = "gomuks-web";
restartTriggers = [ settingsFileUnsubstituted ];
environment.GOMUKS_ROOT = "/var/lib/gomuks-web";
wantedBy = [ "multi-user.target" ];
wants = [ "network-online.target" ] ++ cfg.serviceDependencies;
after = [ "network-online.target" ] ++ cfg.serviceDependencies;
path = [ pkgs.ffmpeg-headless ];
preStart = ''
# substitute the settings file by environment variables
# in this case read from EnvironmentFile
test -f '${settingsFile}' && rm -f '${settingsFile}'
old_umask=$(umask)
umask 0177
${pkgs.envsubst}/bin/envsubst \
-o '${settingsFile}' \
-i '${settingsFileUnsubstituted}'
umask $old_umask
'';
serviceConfig = {
Type = "simple";
ExecStart = lib.getExe pkgs.gomuks-web;
DynamicUser = true;
User = "gomuks-web";
Group = "gomuks-web";
EnvironmentFile = cfg.environmentFile;
StateDirectory = "gomuks-web";
Restart = "on-failure";
RestartSec = "30s";
LockPersonality = true;
NoNewPrivileges = true;
PrivateDevices = true;
PrivateTmp = true;
PrivateUsers = true;
ProtectClock = true;
ProtectControlGroups = true;
ProtectHome = true;
ProtectHostname = true;
ProtectKernelLogs = true;
ProtectKernelModules = true;
ProtectKernelTunables = true;
ProtectSystem = "strict";
RestrictRealtime = true;
RestrictSUIDSGID = true;
SystemCallArchitectures = "native";
SystemCallErrorNumber = "EPERM";
SystemCallFilter = [ "@system-service" ];
};
};
};
}