如何在cloudfoundry /类似PaaS上模拟持久文件系统？

In Cloudfoundry, there is no persistent file-system storage in the app containers. The standard suggestion is to use DB, but I have a specific scenario where write to persistent file is needed. I use a 3rd party app that requires storing config data on file. I can select the file path but I cannot override the persistent file storage requirement. In Cloudfoundry, there is no persistent file-sy