如何在运行pod节点上获取pod名称和命名空间？

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
    - name: my-container
      image: my-image
      env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
      volumeMounts:
        - name: pod-info
          mountPath: /etc/pod-info
  volumes:
    - name: pod-info
      downwardAPI:
        items:
          - path: podname
            fieldRef:
              fieldPath: metadata.name
          - path: namespace
            fieldRef:
              fieldPath: metadata.namespace