enable qemu guest agent per default

common/default.nix

@@ -5,10 +5,12 @@
 
   # Set your time zone.
   time.timeZone = "Europe/Berlin";
-  # networking.useDHCP = false;  TODO: why was this globally disabled?
+  # networking.useDHCP = false;  TODO: why was this globally disabled? Because it should be! DHCP should only be enabled per interface.
   networking.firewall.allowedTCPPorts = [ 19999 ];
   services.netdata.enable = true;
 
+  services.qemuGuest.enable = true;
+
   # Select internationalisation properties.
   i18n.defaultLocale = "en_US.UTF-8";
   console = {

flake.nix

@@ -26,6 +26,10 @@
         deployment.targetUser = null;
       };
 
+      dns = { config, pkgs, ... }: {
+        deployment.targetHost = "dns.bula22.de";
+      };
+
       monitoring = { config, pkgs, ... }: {
         deployment.targetHost = "monitoring.bula22.de";
       };
@@ -40,7 +44,7 @@
       };
 
       pre-router = { config, pkgs, ... }: {
-        deployment.targetHost = "lightbuffet.entr0py.cloud";
+        deployment.targetHost = "lightbuffet.bula22.de";
         deployment.keys = {
 
         };

hosts/dns/configuration.nix

@@ -0,0 +1,31 @@
+{ config, pkgs, ... }:
+
+{
+  imports =
+    [ # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+      ./dns.nix
+   ];
+
+  # Use the systemd-boot EFI boot loader.
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  networking.hostName = "dns-1"; # Define your hostname.
+
+  # The global useDHCP flag is deprecated, therefore explicitly set to false here.
+  # Per-interface useDHCP will be mandatory in the future, so this generated config
+  # replicates the default behaviour.
+  networking.useDHCP = false;
+  #networking.interfaces.ens18.useDHCP = false;
+  #networking.interfaces.ens19.useDHCP = false;
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "21.11"; # Did you read the comment?
+
+}

hosts/dns/dns.nix

@@ -0,0 +1,40 @@
+{ config, pkgs, lib, ...}:
+
+{
+  networking.firewall.interfaces.ens19.allowedUDPPorts = [ 53 ];
+  services.coredns = {
+    enable = true;
+    config = ''
+      .:53 {
+        log
+        cache
+        unbound
+      }
+    '';
+    package = lib.fix (self: (pkgs.buildGoModule {
+      inherit (pkgs.coredns) pname version src postPatch;
+
+      patches = pkgs.coredns.patches or [ ] ++ [
+        ./coredns-unbound.patch
+      ];
+
+      buildInputs = [ pkgs.unbound ];
+
+      vendorSha256 = "sha256-48S1oT+5uT6d+AM8u93AOTbJkW3CLtaowGv+th3cfyM=";
+
+      preBuild = ''
+        go generate
+
+        postInstall () {
+          cp go.mod $out
+        }
+      '';
+
+    }).overrideAttrs(old: {
+      preBuild = ''
+        cp ${self.passthru.go-modules}/go.mod .
+        go generate
+      '';
+    }));
+  };
+}