Will ZimaOS automatically restore Docker apps from an existing OpenZFS pool after reinstall?

Insight & Feedback
1

If I create a native OpenZFS pool (not ZimaOS RAID), move AppData, Docker images and User Database to that ZFS pool, then reinstall ZimaOS, import the existing ZFS pool and set the same AppData location again, will ZimaOS automatically rediscover the existing Docker applications, or do I have to reinstall/import every app manually?

2

I would not assume ZimaOS will automatically rediscover all Docker apps just because the old OpenZFS pool is imported again.

Docker apps are not only the /DATA/AppData folders. ZimaOS/CasaOS also depends on Docker container definitions, compose/app records, volumes, networks, image state, and its own user/app database. If those records are not restored exactly, the app data may still exist on the ZFS pool, but the apps may not appear back automatically in the dashboard.

In my opinion, the safer expectation is:

  1. Import the existing ZFS pool.
  2. Confirm the old AppData path is mounted exactly where expected.
  3. Reinstall/import the apps using the same compose settings.
  4. Point each app back to the existing AppData folders.
  5. Verify each container, bind mount, volume, and network before starting everything.

For example, before assuming the data is usable, I would check:

docker ps -a
docker images
docker volume ls
docker network ls
find /DATA/AppData -maxdepth 2 -type d | sort

If the original Docker metadata and ZimaOS app database were also backed up and restored, then recovery may be closer to automatic. But if only the ZFS pool and AppData folders are preserved, I would treat it as app data recovery, not a full automatic app restore.

So the short answer is: the data can probably be reused, but I would not rely on ZimaOS automatically rediscovering every existing Docker app after reinstall. I would plan to re-import or reinstall the app definitions manually, then reconnect them to the existing persistent data.

3

Thank you very much for the detailed explanation. That makes the expected behavior much clearer and helps me understand how I should plan a reinstall. I appreciate you taking the time to explain it so thoroughly.