大量使用和创建Pod后，Kubernetes不会自动缩小规模

Question

我运行名为“ helloworld”的Istio示例，然后获得该服务的HPA。当我创建一个高负载时，kubernetes会自动创建一个新的pod，但是10个小时后副本仍在9个上。

NAME            TARGETS   MINPODS   MAXPODS   REPLICAS   AGE
helloworld-v2    2%/50%    1           10        9       17h

如何告诉kubernetes自动删除某些副本？

  

kubectl描述HPA

Name:                                                  helloworld-v2
Namespace:                                             default
Labels:                                                <none>
Annotations:                                           <none>
CreationTimestamp:                                     Wed, 14 Nov 2018 16:24:26 +0000
Reference:                                                 Deployment/helloworld-v2
Metrics:                                               ( current / target )
  resource cpu on pods  (as a percentage of request):  3% (3m) / 50%
Min replicas:                                          1
Max replicas:                                          10
Deployment pods:                                       9 current / 9 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 cpu resource utilization (percentage of request)
  ScalingLimited  False   DesiredWithinRange  the desired count is within the acceptable range
Events:           <none>

  

kubectl描述部署helloworld-v2

Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      True    MinimumReplicasAvailable
OldReplicaSets:  helloworld-v2-6b6d5ddd54 (9/9 replicas created)
NewReplicaSet:   <none>
Events:          <none>

我没有发现任何错误。