The extention of updateable fields in Pod
I wonder why only some fields of a pod can be modified。 The updateable fields are：
In my actual business, I have a need to change the schedulername of a pod. So i change the validating codes in the file of validation.go. And i created a second scheduler named kube-scheduler-test. That is pod whose schedulername is kube-scheduler-test When i created a new pod whose schedulername is kube-scheduler-test, then the kube-scheduler-test will update the schedulername of pod to default-scheduler. And then default-scheduler will schedule this pod to specified node.
Could you explain why only some fields of a pod can be modified and whether my method of changing the schedulername acceptable or not？
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1 Answer
Pods are designed to be disposable, think of them as immutable. When you want to change anything about a Pod, you create a new Pod, and throw away the old Pod.
There are many articles explaining immutable infrastructure.