bind: Use topology spread constraint instead of anti affinity rules

bind/bind-secondary.yaml

@@ -76,16 +76,13 @@ spec:
                   name: bind-readonly-secret
         - name: bind-data
           emptyDir: {}
-      affinity:
-        podAntiAffinity:
-          requiredDuringSchedulingIgnoredDuringExecution:
-            - labelSelector:
-                matchExpressions:
-                  - key: app
-                    operator: In
-                    values:
-                      - bind-secondary
-              topologyKey: "kubernetes.io/hostname"
+      topologySpreadConstraints:
+        - maxSkew: 1
+          topologyKey: topology.kubernetes.io/zone
+          whenUnsatisfiable: DoNotSchedule
+          labelSelector:
+            matchLabels:
+              app: bind-secondary
 ---
 apiVersion: v1
 kind: Service