nixpkgs/nixos/modules/services/networking/unbound.nix

106 lines
2.5 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.unbound;
username = "unbound";
stateDir = "/var/lib/unbound";
access = concatMapStrings (x: " access-control: ${x} allow\n") cfg.allowedAccess;
interfaces = concatMapStrings (x: " interface: ${x}\n") cfg.interfaces;
forward = optionalString (length cfg.forwardAddresses != 0)
"forward-zone:\n name: .\n" +
concatMapStrings (x: " forward-addr: ${x}\n") cfg.forwardAddresses;
confFile = pkgs.writeText "unbound.conf" ''
server:
directory: "${stateDir}"
username: ${username}
# make sure unbound can access entropy from inside the chroot.
# e.g. on linux the use these commands (on BSD, devfs(8) is used):
# mount --bind -n /dev/random /etc/unbound/dev/random
# and mount --bind -n /dev/log /etc/unbound/dev/log
chroot: "${stateDir}"
# logfile: "${stateDir}/unbound.log" #uncomment to use logfile.
pidfile: "${stateDir}/unbound.pid"
verbosity: 1 # uncomment and increase to get more logging.
${interfaces}
${access}
${forward}
${cfg.extraConfig}
'';
in
{
###### interface
options = {
services.unbound = {
enable = mkOption {
default = false;
description = "Whether to enable the Unbound domain name server.";
};
allowedAccess = mkOption {
default = ["127.0.0.0/24"];
description = "What networks are allowed to use unbound as a resolver.";
};
interfaces = mkOption {
default = [ "127.0.0.1" "::1" ];
description = "What addresses the server should listen on.";
};
forwardAddresses = mkOption {
default = [ ];
description = "What servers to forward queries to.";
};
extraConfig = mkOption {
default = "";
description = "Extra lines of unbound config.";
};
};
};
###### implementation
config = mkIf cfg.enable {
environment.systemPackages = [ pkgs.unbound ];
users.extraUsers = singleton {
name = username;
uid = config.ids.uids.unbound;
description = "unbound daemon user";
home = stateDir;
createHome = true;
};
systemd.services.unbound = {
description="Unbound recursive Domain Name Server";
after = [ "network.target" ];
before = [ "nss-lookup.target" ];
wants = [" nss-lookup.target" ];
wantedBy = [ "multi-user.target" ];
path = [ pkgs.unbound ];
serviceConfig.ExecStart = "${pkgs.unbound}/sbin/unbound -d -c ${confFile}";
};
};
}