instruction: Create a Dockerfile for storage
output: ```dockerfile
  from in-tree plugins
  
  FEATURE STATE: Kubernetes v1.25 [stable]
  
  The CSIMigration feature directs operations against existing in-tree
  plugins to corresponding CSI plugins (which are expected to be installed and configured).
  As a result, operators do not have to make any
  configuration changes to existing Storage Classes, PersistentVolumes or PersistentVolumeClaims
  (referring to in-tree plugins) when transitioning to a CSI driver that supersedes an in-tree plugin.
  
  Note: Existing PVs created by a in-tree volume plugin can still be used in the future without any configuration
  changes, even after the migration to CSI is completed for that volume type, and even after you upgrade to a
  version of Kubernetes that doesn't have compiled-in support for that kind of storage.
  As part of that migration, you - or another cluster administrator - must have installed and configured
  the appropriate CSI driver for that storage. The core of Kubernetes does not install that software for you.
  
  After that migration, you can also define new PVCs and PVs that refer to the legacy, built-in
  storage integrations.
  Provided you have the appropriate CSI driver installed and configured, the PV creation continues
  to work, even for brand new volumes. The actual storage management now happens through
  the CSI driver.
  
  The operations and features that are supported include:
  provisioning/delete, attach/detach, mount/unmount and resizing of volumes.
  In-tree plugins that support CSIMigration and have a corresponding CSI driver implemented
  are listed in Types of Volumes.
  The following in-tree plugins support persistent storage on Windows nodes:
  
  azureFile
  gcePersistentDisk
  vsphereVolume
  
  flexVolume (deprecated)
  
  FEATURE STATE: Kubernetes v1.23 [deprecated]
  
  FlexVolume is an out-of-tree plugin interface that uses an exec-based model to interface
  with storage drivers. The FlexVolume driver binaries must be installed in a pre-defined
  volume plugin path on each node and in some cases the control plane nodes as well.
  Pods interact with FlexVolume drivers through the flexVolume in-tree volume plugin.
  For more details, see the FlexVolume README document.
  The following FlexVolume plugins,
  deployed as PowerShell scripts on the host, support Windows nodes:
  
  SMB
  iSCSI
  
  Note: FlexVolume is deprecated. Using an out-of-tree CSI driver is the recommended way to integrate external storage with Kubernetes.
  Maintainers of FlexVolume driver should implement a CSI Driver and help to migrate users of FlexVolume drivers to CSI.
  Users of FlexVolume should move their workloads to use the equivalent CSI Driver.
  
  Mount propagation
  Mount propagation allows for sharing volumes mounted by a container to
  other containers in the same pod, or even to other pods on the same node.
  Mount propagation of a volume is controlled by the mountPropagation field
  in containers[*].volumeMounts. Its values are:
  
  None - This volume mount will not receive any subsequent mounts
  that are mounted to this volume or any of its subdirectories by the host.
  In similar fashion, no mounts created by the container will be visible on
  the host. This is the default mode.
  This mode is equal to rprivate mount propagation as described in
  mount(8)
  However, the CRI runtime may choose rslave mount propagation (i.e.,
  HostToContainer) instead, when rprivate propagation is not applicable.
  cri-dockerd (Docker) is known to choose rslave mount propagation when the
  mount source contains the Docker daemon's root directory (/var/lib/docker).
  
  HostToContainer - This volume mount will receive all subsequent mounts
  that are mounted to this volume or any of its subdirectories.
  In other words, if the host mounts anything inside the volume mount, the
  container will see it mounted there.
  Similarly, if any Pod with Bidirectional mount propagation to the same
  volume mounts anything there, the container with HostToContainer mount
  propagation will see it.
  This mode is equal to rslave mount propagation as described in the
  mount(8)
  
  Bidirectional - This volume mount behaves the same the HostToContainer mount.
  In addition, all volume mounts created by the container will be propagated
  back to the host and to all containers of all pods that use the same volume.
  A typical use case for this mode is a Pod with a FlexVolume or CSI driver or
  a Pod that needs to mount something on the host using a hostPath volume.
  This mode is equal to rshared mount propagation as described in the
  mount(8)
  
  Warning: Bidirectional mount propagation can be dangerous. It can damage
  the host operating system and therefore it is allowed only in privileged
  containers. Familiarity with Linux kernel behavior is strongly recommended.
  In addition, any volume mounts created by containers in pods must be destroyed
  (unmounted) by the containers on termination.
  
  What's next
  Follow an example of deploying WordPress and MySQL with Persistent Volumes.
  
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   Last modified April 10, 2024 at 7:49 AM PST: Update volumes.md (c94fa0cbed)
  
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  Background
  Types of volumes
  
  awsElasticBlockStore (removed)
  azureDisk (removed)
  azureFile (deprecated)
  cephfs
  cinder (removed)
  configMap
  downwardAPI
  emptyDir
  fc (fibre channel)
  gcePersistentDisk (removed)
  gitRepo (deprecated)
  glusterfs (removed)
  hostPath
  iscsi
  local
  nfs
  persistentVolumeClaim
  portworxVolume (deprecated)
  projected
  rbd
  secret
  vsphereVolume (deprecated)
  
  Using subPath
  
  Using subPath with expanded environment variables
  
  Resources
  Out-of-tree volume plugins
  
  csi
  flexVolume (deprecated)
  
  Mount propagation
  What's next
  
  Documentation
  Blog
  Training
  Partners
  Community
  Case Studies
  
  © 2025 The Kubernetes Authors | Documentation Distributed under CC BY 4.0
  
  ICP license: 京ICP备17074266号-3
  ```