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|
{
config,
lib,
pkgs,
...
}:
let
cfg = config.services.knot-resolver;
# pkgs.writers.yaml_1_1.generate with additional kresctl validate
configFile = pkgs.callPackage (
{
runCommandLocal,
remarshal,
stdenv,
}:
runCommandLocal "knot-resolver.yaml"
{
nativeBuildInputs = [ remarshal ];
value = builtins.toJSON cfg.settings;
passAsFile = [ "value" ];
}
''
remarshal --from json --to yaml-1.1 "$valuePath" "$out"
${
# We skip validation if the build platform cannot execute # the binary targeting the host platform.
lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
${cfg.managerPackage}/bin/kresctl validate "$out"
''
}
''
) { };
in
{
meta.maintainers = [
lib.maintainers.vcunat # upstream developer
lib.maintainers.leona
lib.maintainers.osnyx
];
###### interface
options.services.knot-resolver = {
enable = lib.mkOption {
type = lib.types.bool;
default = false;
description = ''
Whether to enable knot-resolver (version 6) domain name server.
DNSSEC validation is turned on by default.
If you want to use knot-resolver 5, please use services.kresd.
'';
};
managerPackage = lib.mkPackageOption pkgs "knot-resolver-manager_6" {
example = "pkgs.knot-resolver-manager_6.override { extraFeatures = true; }";
};
settings = lib.mkOption {
type = lib.types.submodule {
freeformType = (pkgs.formats.yaml { }).type;
options = {
network.listen = lib.mkOption {
type = lib.types.listOf (
lib.types.submodule {
freeformType = (pkgs.formats.yaml { }).type;
}
);
description = "List of interfaces to listen to and its configuration.";
default = [
{
interface = [ "127.0.0.1" ];
kind = "dns";
freebind = false;
}
]
++ lib.optionals config.networking.enableIPv6 [
{
interface = [ "::1" ];
kind = "dns";
freebind = false;
}
];
defaultText = lib.literalExpression ''
[
{
interface = [ "127.0.0.1" ];
kind = "dns";
freebind = false;
}
]
++ lib.optionals config.networking.enableIPv6 [
{
interface = [ "::1" ];
kind = "dns";
freebind = false;
}
];
'';
};
workers = lib.mkOption {
type = lib.types.oneOf [
(lib.types.enum [ "auto" ])
lib.types.ints.unsigned
];
default = 1;
description = ''
The number of running kresd (Knot Resolver daemon) workers. If set to 'auto', it is equal to number of CPUs available.
'';
};
};
};
default = { };
description = ''
Nix-based (RFC 42) configuration for Knot Resolver.
For configuration reference (described as YAML) see
<https://www.knot-resolver.cz/documentation/latest/config-overview.html>
'';
};
};
###### implementation
config = lib.mkIf cfg.enable {
users.users.knot-resolver = {
isSystemUser = true;
group = "knot-resolver";
description = "Knot-resolver daemon user";
};
users.groups.knot-resolver = { };
networking.resolvconf.useLocalResolver = lib.mkDefault true;
environment = {
etc."knot-resolver/config.yaml".source = configFile;
systemPackages = [
# We just avoid including the other binaries, e.g. supervisorctl.
(pkgs.runCommandLocal "knot-resolver-cmds" { } ''
mkdir -p "$out/bin"
ln -s '${cfg.managerPackage}/bin/kresctl' "$out/bin/"
'')
];
};
systemd.packages = [ cfg.managerPackage.kresd ]; # the unit gets patched a bit just below
systemd.services."knot-resolver" = {
wantedBy = [ "multi-user.target" ];
stopIfChanged = false;
reloadTriggers = [
configFile
];
serviceConfig = {
ExecStart = "${cfg.managerPackage}/bin/knot-resolver";
ExecReload = "${cfg.managerPackage}/bin/kresctl reload";
StateDirectory = "knot-resolver";
StateDirectoryMode = "0770";
RuntimeDirectory = "knot-resolver";
RuntimeDirectoryMode = "0770";
CacheDirectory = "knot-resolver";
CacheDirectoryMode = "0770";
};
};
};
}
|
