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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.knot;
configFile = pkgs.writeText "knot.conf" cfg.extraConfig;
socketFile = "/run/knot/knot.sock";
knotConfCheck = file: pkgs.runCommand "knot-config-checked"
{ buildInputs = [ cfg.package ]; } ''
ln -s ${configFile} $out
knotc --config=${configFile} conf-check
'';
knot-cli-wrappers = pkgs.stdenv.mkDerivation {
name = "knot-cli-wrappers";
buildInputs = [ pkgs.makeWrapper ];
buildCommand = ''
mkdir -p $out/bin
makeWrapper ${cfg.package}/bin/knotc "$out/bin/knotc" \
--add-flags "--config=${configFile}" \
--add-flags "--socket=${socketFile}"
makeWrapper ${cfg.package}/bin/keymgr "$out/bin/keymgr" \
--add-flags "--config=${configFile}"
for executable in kdig khost kjournalprint knsec3hash knsupdate kzonecheck
do
ln -s "${cfg.package}/bin/$executable" "$out/bin/$executable"
done
mkdir -p "$out/share"
ln -s '${cfg.package}/share/man' "$out/share/"
'';
};
in {
options = {
services.knot = {
enable = mkEnableOption "Knot authoritative-only DNS server";
extraArgs = mkOption {
type = types.listOf types.str;
default = [];
description = ''
List of additional command line paramters for knotd
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
description = ''
Extra lines to be added verbatim to knot.conf
'';
};
package = mkOption {
type = types.package;
default = pkgs.knot-dns;
defaultText = "pkgs.knot-dns";
description = ''
Which Knot DNS package to use
'';
};
};
};
config = mkIf config.services.knot.enable {
systemd.services.knot = {
unitConfig.Documentation = "man:knotd(8) man:knot.conf(5) man:knotc(8) https://www.knot-dns.cz/docs/${cfg.package.version}/html/";
description = cfg.package.meta.description;
wantedBy = [ "multi-user.target" ];
wants = [ "network.target" ];
after = ["network.target" ];
serviceConfig = {
Type = "notify";
ExecStart = "${cfg.package}/bin/knotd --config=${knotConfCheck configFile} --socket=${socketFile} ${concatStringsSep " " cfg.extraArgs}";
ExecReload = "${knot-cli-wrappers}/bin/knotc reload";
CapabilityBoundingSet = "CAP_NET_BIND_SERVICE CAP_SETPCAP";
AmbientCapabilities = "CAP_NET_BIND_SERVICE CAP_SETPCAP";
NoNewPrivileges = true;
DynamicUser = "yes";
RuntimeDirectory = "knot";
StateDirectory = "knot";
StateDirectoryMode = "0700";
PrivateDevices = true;
RestrictAddressFamilies = "AF_UNIX AF_INET AF_INET6";
SystemCallArchitectures = "native";
Restart = "on-abort";
};
};
environment.systemPackages = [ knot-cli-wrappers ];
};
}
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