apiVersion: v1
kind: Pod
metadata:
  name: rro
spec:
  volumes:
    - name: mnt
      hostPath:
        # tmpfs 被挂载到 /mnt/tmpfs 上
        path: /mnt
  containers:
    - name: busybox
      image: busybox
      args: ["sleep", "infinity"]
      volumeMounts:
        # /mnt-rro/tmpfs 不可写入
        - name: mnt
          mountPath: /mnt-rro
          readOnly: true
          mountPropagation: None
          recursiveReadOnly: Enabled
        # /mnt-ro/tmpfs 可写入
        - name: mnt
          mountPath: /mnt-ro
          readOnly: true
        # /mnt-rw/tmpfs 可写入
        - name: mnt
          mountPath: /mnt-rw
