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|
{
config,
lib,
pkgs,
...
}:
with lib;
let
cfg = config.services.powerdns;
configDir = pkgs.writeTextDir "pdns.conf" "${cfg.extraConfig}";
finalConfigDir = if cfg.secretFile == null then configDir else "/run/pdns";
in
{
options = {
services.powerdns = {
enable = mkEnableOption "PowerDNS domain name server";
extraConfig = mkOption {
type = types.lines;
default = "launch=bind";
description = ''
PowerDNS configuration. Refer to
<https://doc.powerdns.com/authoritative/settings.html>
for details on supported values.
'';
};
secretFile = mkOption {
type = types.nullOr types.path;
default = null;
example = "/run/keys/powerdns.env";
description = ''
Environment variables from this file will be interpolated into the
final config file using envsubst with this syntax: `$ENVIRONMENT`
or `''${VARIABLE}`.
The file should contain lines formatted as `SECRET_VAR=SECRET_VALUE`.
This is useful to avoid putting secrets into the nix store.
'';
};
};
};
config = mkIf cfg.enable {
environment.etc.pdns.source = finalConfigDir;
systemd.packages = [ pkgs.pdns ];
systemd.services.pdns = {
wantedBy = [ "multi-user.target" ];
after = [
"network.target"
"mysql.service"
"postgresql.target"
"openldap.service"
];
serviceConfig = {
EnvironmentFile = lib.optional (cfg.secretFile != null) cfg.secretFile;
ExecStartPre = lib.optional (cfg.secretFile != null) (
pkgs.writeShellScript "pdns-pre-start" ''
umask 077
${pkgs.envsubst}/bin/envsubst -i "${configDir}/pdns.conf" > ${finalConfigDir}/pdns.conf
''
);
ExecStart = [
""
"${pkgs.pdns}/bin/pdns_server --config-dir=${finalConfigDir} --guardian=no --daemon=no --disable-syslog --log-timestamp=no --write-pid=no"
];
};
};
users.users.pdns = {
isSystemUser = true;
group = "pdns";
description = "PowerDNS";
};
users.groups.pdns = { };
};
}
|
