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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.adguardhome;
args = concatStringsSep " " ([
"--no-check-update"
"--pidfile /run/AdGuardHome/AdGuardHome.pid"
"--work-dir /var/lib/AdGuardHome/"
"--config /var/lib/AdGuardHome/AdGuardHome.yaml"
] ++ cfg.extraArgs);
baseConfig = {
bind_host = cfg.host;
bind_port = cfg.port;
};
configFile = pkgs.writeTextFile {
name = "AdGuardHome.yaml";
text = builtins.toJSON (recursiveUpdate cfg.settings baseConfig);
checkPhase = "${pkgs.adguardhome}/bin/adguardhome -c $out --check-config";
};
in {
options.services.adguardhome = with types; {
enable = mkEnableOption "AdGuard Home network-wide ad blocker";
host = mkOption {
default = "0.0.0.0";
type = str;
description = ''
Host address to bind HTTP server to.
'';
};
port = mkOption {
default = 3000;
type = port;
description = ''
Port to serve HTTP pages on.
'';
};
openFirewall = mkOption {
default = false;
type = bool;
description = ''
Open ports in the firewall for the AdGuard Home web interface. Does not
open the port needed to access the DNS resolver.
'';
};
mutableSettings = mkOption {
default = true;
type = bool;
description = ''
Allow changes made on the AdGuard Home web interface to persist between
service restarts.
'';
};
settings = mkOption {
type = (pkgs.formats.yaml { }).type;
default = { };
description = ''
AdGuard Home configuration. Refer to
<link xlink:href="https://github.com/AdguardTeam/AdGuardHome/wiki/Configuration#configuration-file"/>
for details on supported values.
<note><para>
On start and if <option>mutableSettings</option> is <literal>true</literal>,
these options are merged into the configuration file on start, taking
precedence over configuration changes made on the web interface.
</para></note>
'';
};
extraArgs = mkOption {
default = [ ];
type = listOf str;
description = ''
Extra command line parameters to be passed to the adguardhome binary.
'';
};
};
config = mkIf cfg.enable {
assertions = [
{
assertion = cfg.settings != { }
-> (hasAttrByPath [ "dns" "bind_host" ] cfg.settings)
|| (hasAttrByPath [ "dns" "bind_hosts" ] cfg.settings);
message =
"AdGuard setting dns.bind_host or dns.bind_hosts needs to be configured for a minimal working configuration";
}
{
assertion = cfg.settings != { }
-> hasAttrByPath [ "dns" "bootstrap_dns" ] cfg.settings;
message =
"AdGuard setting dns.bootstrap_dns needs to be configured for a minimal working configuration";
}
];
systemd.services.adguardhome = {
description = "AdGuard Home: Network-level blocker";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
unitConfig = {
StartLimitIntervalSec = 5;
StartLimitBurst = 10;
};
preStart = optionalString (cfg.settings != { }) ''
if [ -e "$STATE_DIRECTORY/AdGuardHome.yaml" ] \
&& [ "${toString cfg.mutableSettings}" = "1" ]; then
# Writing directly to AdGuardHome.yaml results in empty file
${pkgs.yaml-merge}/bin/yaml-merge "$STATE_DIRECTORY/AdGuardHome.yaml" "${configFile}" > "$STATE_DIRECTORY/AdGuardHome.yaml.tmp"
mv "$STATE_DIRECTORY/AdGuardHome.yaml.tmp" "$STATE_DIRECTORY/AdGuardHome.yaml"
else
cp --force "${configFile}" "$STATE_DIRECTORY/AdGuardHome.yaml"
chmod 600 "$STATE_DIRECTORY/AdGuardHome.yaml"
fi
'';
serviceConfig = {
DynamicUser = true;
ExecStart = "${pkgs.adguardhome}/bin/adguardhome ${args}";
AmbientCapabilities = [ "CAP_NET_BIND_SERVICE" ];
Restart = "always";
RestartSec = 10;
RuntimeDirectory = "AdGuardHome";
StateDirectory = "AdGuardHome";
};
};
networking.firewall.allowedTCPPorts = mkIf cfg.openFirewall [ cfg.port ];
};
}
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