add nodeAffinity and make k3s pihole master

clusters/default/tools/pihole/pihole.yml

@@ -2,7 +2,7 @@
 apiVersion: apps/v1
 kind: DaemonSet
 metadata:
-  name: pihole-backup
+  name: pihole
   namespace: tools
 spec:
   selector:
@@ -14,7 +14,18 @@ spec:
         app: pihole
     spec:
       hostNetwork: true
-      dnsPolicy: ClusterFirstWithHostNet
+
+      nodeAffinity:
+        requiredDuringSchedulingIgnoredDuringExecution:
+          nodeSelectorTerms:
+            - matchExpressions:
+                - key: kubernetes.io/hostname
+                  operator: In
+                  values:
+                    - kube-02
+                    - kube-03
+                    - kube-04
+                    - kube-05
 
       initContainers:
       - name: init-keepalived