Memory based HPA doesn't work

Rancher 2.x
1

Hello,

I installed the latest Kubernetes with Rancher, then I created the following manifests:

apiVersion: apps/v1beta2
kind: Deployment
metadata:
  labels:
    app: hello-world
  name: hello-world
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hello-world
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: hello-world
    spec:
      containers:
      - image: rancher/hello-world
        imagePullPolicy: Always
        name: hello-world
        resources:
          requests:
            cpu: 500m
            memory: 64Mi
        ports:
        - containerPort: 80
          protocol: TCP
      restartPolicy: Always
---
apiVersion: v1
kind: Service
metadata:
  name: hello-world
  namespace: default
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: hello-world

apiVersion: autoscaling/v2beta1
kind: HorizontalPodAutoscaler
metadata:
  name: hello-world
  namespace: default
spec:
  scaleTargetRef:
    apiVersion: extensions/v1beta1
    kind: Deployment
    name: hello-world
  minReplicas: 1
  maxReplicas: 10
  metrics:
  - type: Resource
    resource:
      name: cpu
      targetAverageUtilization: 50
  - type: Resource
    resource:
      name: memory
      targetAverageValue: 1000Mi

The memory based HPA doesn’t work

Name:                                                  hello-world
Namespace:                                             default
Labels:                                                <none>
Annotations:                                           <none>
CreationTimestamp:                                     Wed, 12 Jun 2019 15:26:29 +0300
Reference:                                             Deployment/hello-world
Metrics:                                               ( current / target )
  resource memory on pods:                             <unknown> / 1000Mi
  resource cpu on pods  (as a percentage of request):  0% (0) / 50%
Min replicas:                                          1
Max replicas:                                          10
Deployment pods:                                       1 current / 1 desired
Conditions:
  Type            Status  Reason              Message
  ----            ------  ------              -------
  AbleToScale     True    ReadyForNewScale    recommended size matches current size
  ScalingActive   True    ValidMetricFound    the HPA was able to successfully calculate a replica count from memory resource
  ScalingLimited  False   DesiredWithinRange  the desired count is within the acceptable range
Events:
  Type     Reason                        Age                From                       Message
  ----     ------                        ----               ----                       -------
  Warning  FailedGetResourceMetric       32m (x4 over 33m)  horizontal-pod-autoscaler  unable to get metrics for resource memory: no metrics returned from resource metrics API
  Warning  FailedComputeMetricsReplicas  32m (x4 over 33m)  horizontal-pod-autoscaler  failed to get memory utilization: unable to get metrics for resource memory: no metrics returned from resource metrics API

NAME          REFERENCE                TARGETS                    MINPODS   MAXPODS   REPLICAS   AGE
hello-world   Deployment/hello-world   <unknown>/1000Mi, 0%/50%   1         10        1          37m