// Ex. "ext4", "xfs". Implicitly inferred to be "ext4" if unspecified.
  optional string fsType = 2;

  // readOnly defaults to false (read/write). ReadOnly here will force
  // the ReadOnly setting in VolumeMounts.
  // +optional
  optional bool readOnly = 3;
}

// Preconditions must be fulfilled before an operation (update, delete, etc.) is carried out.