我有一个简单的kubernetes部署，包含3个nginx容器的副本。
Kubernetes文档here说：
注意：当且仅当时，才会触发部署的卷展栏 部署的pod模板（即.spec.template）已更改 示例是否更新模板的标签或容器图像。 其他更新（例如扩展部署）不会触发 部署。
但是，当我扩展部署时，它会触发推出。我在这里想念的是什么？：
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
答案 0 :(得分：0)
是的，推出这个术语有点含糊不清，应该澄清一下，但这意味着当你更新pod模板时，现有的pod会被放下，新的pod会根据推出的人体工程学设置出来。当您只更改副本号时，现有的pod将保留在原位，并且与现有的pod相同。因此，它就像添加到上一个部署，而不是创建一个新的部署。