watch pods instead of polling

deployment/roles.yaml

@@ -4,7 +4,7 @@ metadata:
   name: cart-discovery
 rules:
   - apiGroups: [""] # "" indicates the core API group
-    resources: ["pods","services"]
+    resources: ["pods","services", "deployments"]
     verbs: ["get", "watch", "list"]
 ---
 apiVersion: rbac.authorization.k8s.io/v1

deployment/scaling.yaml

@@ -4,8 +4,9 @@ metadata:
   name: cart-scaler
 spec:
   scaleTargetRef:
+    apiVersion: apps/v1
     kind: Deployment
     name: cart-actor
-  minReplicas: 1
-  maxReplicas: 5
+  minReplicas: 2
+  maxReplicas: 8
   targetCPUUtilizationPercentage: 50