Q&A: Can I use a separate, external storage in a docker App

Is there a standard mechanism how Docker Apps integrate their data storage and is it possible to provide this path as a separate mointpoint?

Question

Can I use a separate, external storage in a docker App?

Answer

Yes, into all containers of Docker Apps from the App Center, /var/lib/univention-appcenter/$appid/{config,files} is mounted from the host.
You would need to use /var/lib/univention-appcenter/ as mountpoint in the fstab.