Hi,

while playing around with the system (like changing configs of containers back and forth) something I don't understand is increasing (see picture below). I have five containers running, but there is this huge number of images(?) under the docker dataset. Can anybody tell me what it is, what it is needed for and how I can remove it if reasonable?

I run unraid 7.1.4 with a pool of four nvme drives, mounted at /mnt/nvme. The pool also contains other datasets for e.g. personal shares, VMs, etc.

Thanks :-)

Klayman

Edited June 20, 20251 yr by Klayman

Docker when using the native zfs driver internally uses datasets for lots of things e.g. each individual image layers, so that's normal.

When storing the Docker filesystem on ZFS storage it's recommended to either use a Docker image, or use the overlay driver if you want folder mode.

Edited June 20, 20251 yr by Kilrah

Convert to overlay driver, or better yet IMHO, use an image:

https://docs.unraid.net/unraid-os/release-notes/7.0.0/#add-support-for-overlay2-storage-driver

thanks. I have changd it to overlay 2. Turns out configurations and stuff is still available from the templates and appdata, so I'll try this first and then move to an image later if I encounter further issues. I have also removed the ZFS datasets from docker before "re-enabling" it with overlay. Learning a lot these days ;-)