wildduck: Make sure Haraka, Wildduck and ZoneMTA are scheduled on same hosts for MetalLB

wildduck/wildduck.yaml

@@ -24,7 +24,7 @@ kind: Deployment
 metadata:
   name: wildduck
 spec:
-  replicas: 4
+  replicas: 2
   selector:
     matchLabels:
       app.kubernetes.io/name: wildduck
@@ -35,6 +35,20 @@ spec:
         app.kubernetes.io/name: wildduck
         app.kubernetes.io/component: wildduck
     spec:
+      affinity:
+        podAntiAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                  - key: app.kubernetes.io/name
+                    operator: In
+                    values:
+                      - wildduck
+                  - key: app.kubernetes.io/component
+                    operator: In
+                    values:
+                      - wildduck
+              topologyKey: topology.kubernetes.io/zone
       containers:
         - name: wildduck
           image: docker.io/nodemailer/wildduck