authoritative-dns: Drop INWX secondaries

The time is already stored in the journal, so it does not need to be
logged. Only logging changed values makes the log less polluted once a
fixed value has been reached ((3, 3, 3) or (3, 0, 0)):

modules/authoritative-dns.nix

@@ -67,12 +67,7 @@ in
               id = host;
               address = hostAddresses;
             })
-            addresses) ++ lib.optional isPrimaryHost {
-            id = "inwx";
-            # INWX only allows the specification of one primary DNS,
-            # which limits the IP protocol usable for zone transfers to one.
-            address = lib.singleton "185.181.104.96";
-          };
+            addresses);
         }
         (lib.mkIf isPrimaryHost {
           policy = lib.singleton {
@@ -90,7 +85,7 @@ in
               zonefile-load = "difference-no-serial";
               journal-content = "all";
               # secondary
-              notify = [ "inwx" ] ++ secondaryHosts;
+              notify = secondaryHosts;
               # dnssec
               dnssec-signing = true;
               dnssec-policy = "default";

modules/prometheus/node_exporter.nix

@@ -8,7 +8,10 @@
     enable = config.sbruder.wireguard.home.enable;
     listenAddress = config.sbruder.wireguard.home.address;
     enabledCollectors = [ "systemd" ];
-    disabledCollectors = [ "rapl" ];
+    disabledCollectors = [
+      "arp.netlink" # https://github.com/prometheus/node_exporter/issues/2849
+      "rapl"
+    ];
   };
 
   systemd.services.prometheus-node-exporter.after = [ "wireguard-wg-home.service" ];

pkgs/wordclock-dimmer/wordclock-dimmer.py

@@ -61,15 +61,6 @@ def get_color_for_time(time: datetime.time, base=(60, 60, 60)) -> (int, int, int
         )
 
 
-def update(client: mqtt.Client):
-    time = datetime.datetime.now().time()
-    color = get_color_for_time(time)
-    print(f"{time}: setting color to {color}")
-    sys.stdout.flush()
-    set_color(client, *color)
-    pass
-
-
 client = mqtt.Client("wordclock.py")
 
 user = os.environ["WORDCLOCK_MQTT_USER"]
@@ -83,6 +74,15 @@ host = os.environ["WORDCLOCK_MQTT_HOST"]
 client.username_pw_set(user, password)
 client.connect(host, 1883, 60)
 
+color = (0, 0, 0)
+
 while True:
-    update(client)
+    time = datetime.datetime.now().time()
+    new_color = get_color_for_time(time)
+    if new_color != color:
+        color = new_color
+        print(f"setting color to {color}")
+        sys.stdout.flush()
+        set_color(client, *color)
+
     sleep(300)