How can you assign a sub-namespace in Kubernetes?

In Kubernetes, to assign a pod to a specific namespace, you need to specify the metadata.namespace field in the pod manifest. If this field is not specified, the pod is created in the default namespace.

Example of a pod manifest with namespace specified:

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
  namespace: my-namespace
spec:
  containers:
  - name: nginx
    image: nginx

You can also specify the namespace when creating a pod using kubectl with the command:

kubectl create -f pod.yaml -n my-namespace

Or, when working with an existing pod, it is not possible to move it between namespaces — the namespace is set at creation and cannot be changed.