Limitations in config updates¶

If we change the client-pod.yaml from:

apiVersion: v1
kind: Pod
metadata:
  name: client-pod
  labels:
    component: web
spec:
  containers:
    - name: client
      image: deiveris/multi-worker
      ports:
        - containerPort: 3000

to

apiVersion: v1
kind: Pod
metadata:
  name: client-pod
  labels:
    component: web
spec:
  containers:
    - name: client
      image: deiveris/multi-worker
      ports:
        - containerPort: 9999

And update:

kubectl apply -f client-pod.yaml

It will throw an error saying:

The Pod "client-pod" is invalid: spec: Forbidden: pod updates may not change fields other than `spec.containers[*].image`, `spec.initContainers[*].image`, `spec.activeDeadlineSeconds` or `spec.tolerations` (only additions to existing tolerations)

So, we are only allowed to change these 4 different properties.