DEV-339: added anti-affinity-rule to improve distribution of ingress-controller pods

roles/kubernetes/ingress-controller/defaults/main.yml

@@ -5,6 +5,16 @@ k8s_ingress_helm__release_namespace: "ingress"
 
 k8s_ingress_helm__release_values:
   controller:
+    affinity:
+      podAntiAffinity:
+        requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+            matchExpressions:
+            - key: app.kubernetes.io/name
+              operator: In
+              values:
+              - ingress-nginx
+          topologyKey: app.kubernetes.io/name
     replicaCount: 3
     config:
       compute-full-forwarded-for: "true"