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-rw-r--r--nixos/modules/services/networking/dnsdist.nix53
1 files changed, 53 insertions, 0 deletions
diff --git a/nixos/modules/services/networking/dnsdist.nix b/nixos/modules/services/networking/dnsdist.nix
new file mode 100644
index 00000000000..c7c6a79864c
--- /dev/null
+++ b/nixos/modules/services/networking/dnsdist.nix
@@ -0,0 +1,53 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.dnsdist;
+  configFile = pkgs.writeText "dnsdist.conf" ''
+    setLocal('${cfg.listenAddress}:${toString cfg.listenPort}')
+    ${cfg.extraConfig}
+  '';
+in {
+  options = {
+    services.dnsdist = {
+      enable = mkEnableOption "dnsdist domain name server";
+
+      listenAddress = mkOption {
+        type = types.str;
+        description = "Listen IP Address";
+        default = "0.0.0.0";
+      };
+      listenPort = mkOption {
+        type = types.int;
+        description = "Listen port";
+        default = 53;
+      };
+
+      extraConfig = mkOption {
+        type = types.lines;
+        default = "";
+        description = ''
+          Extra lines to be added verbatim to dnsdist.conf.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.packages = [ pkgs.dnsdist ];
+
+    systemd.services.dnsdist = {
+      wantedBy = [ "multi-user.target" ];
+
+      startLimitIntervalSec = 0;
+      serviceConfig = {
+        DynamicUser = true;
+
+        # upstream overrides for better nixos compatibility
+        ExecStartPre = [ "" "${pkgs.dnsdist}/bin/dnsdist --check-config --config ${configFile}" ];
+        ExecStart = [ "" "${pkgs.dnsdist}/bin/dnsdist --supervised --disable-syslog --config ${configFile}" ];
+      };
+    };
+  };
+}