缩放时触发kubernetes卷展栏

我有一个简单的kubernetes部署，其中包含一个nginx容器的3个副本

Kubernetes的文件说：

注意：当且仅当 部署的pod模板（即，.spec.template）已更改，例如 更新模板的标签或容器图像时的示例。 其他更新（如扩展部署）不会触发 卷展

但是，当我缩放部署时，它确实会触发卷展栏。我错过了什么

C:\Kubernetes>kubectl scale deployment myapp-deployment --replicas=20
deployment "myapp-deployment" scaled

C:\Kubernetes>kubectl rollout status deployment/myapp-deployment
Waiting for rollout to finish: 3 of 20 updated replicas are available...
Waiting for rollout to finish: 4 of 20 updated replicas are available...
Waiting for rollout to finish: 5 of 20 updated replicas are available...
Waiting for rollout to finish: 6 of 20 updated replicas are available...
Waiting for rollout to finish: 7 of 20 updated replicas are available...
Waiting for rollout to finish: 8 of 20 updated replicas are available...
Waiting for rollout to finish: 9 of 20 updated replicas are available...
Waiting for rollout to finish: 10 of 20 updated replicas are available...
Waiting for rollout to finish: 11 of 20 updated replicas are available...
Waiting for rollout to finish: 12 of 20 updated replicas are available...
Waiting for rollout to finish: 13 of 20 updated replicas are available...
Waiting for rollout to finish: 14 of 20 updated replicas are available...
Waiting for rollout to finish: 15 of 20 updated replicas are available...
Waiting for rollout to finish: 16 of 20 updated replicas are available...
Waiting for rollout to finish: 17 of 20 updated replicas are available...
Waiting for rollout to finish: 18 of 20 updated replicas are available...
Waiting for rollout to finish: 19 of 20 updated replicas are available...
deployment "myapp-deployment" successfully rolled out

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是的，术语“卷展”有点含糊不清，应该加以澄清，但它意味着当您更新pod模板时，根据卷展的人体工程学，现有的pod将被拆除，新的pod将被打开。当您仅更改副本编号时，现有的POD将保留在原位，与现有POD相同的POD将旋转起来。因此，这就像添加到上一个卷展栏，而不是创建新卷展栏