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

wildduck/haraka.yaml

@@ -105,7 +105,7 @@ kind: Deployment
 metadata:
   name: haraka
 spec:
-  replicas: 4
+  replicas: 2
   selector:
     matchLabels:
       app.kubernetes.io/name: wildduck
@@ -116,6 +116,33 @@ spec:
         app.kubernetes.io/name: wildduck
         app.kubernetes.io/component: haraka
     spec:
+      affinity:
+        podAntiAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                  - key: app.kubernetes.io/name
+                    operator: In
+                    values:
+                      - wildduck
+                  - key: app.kubernetes.io/component
+                    operator: In
+                    values:
+                      - haraka
+              topologyKey: topology.kubernetes.io/zone
+        podAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                  - key: app.kubernetes.io/name
+                    operator: In
+                    values:
+                      - wildduck
+                  - key: app.kubernetes.io/component
+                    operator: In
+                    values:
+                      - wildduck
+              topologyKey: kubernetes.io/hostname
       containers:
         - name: haraka
           image: docker.io/codemowers/wildduck-haraka-inbound:latest@sha256:a130cc6a60ab2a47cb5971355ed2474136254613b4b8bd30aeabc6e123695ea3