Try to spread redis pod apart

redis/values.yaml

@@ -10,10 +10,24 @@ master:
   service:
     ports:
       redis: 6379
+  affinity:
+    podAntiAffinityPreset:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+          matchLabels:
+            app.kubernetes.io/name: mariadb
+          topologyKey: kubernetes.io/hostname
 replica:
   podLabels:
     redis: replica
   replicaCount: 3
+  affinity:
+    podAntiAffinityPreset:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+          matchLabels:
+            app.kubernetes.io/name: mariadb
+          topologyKey: kubernetes.io/hostname
 metrics:
   enabled: true
   prometheusRule: