Looks like others have had similar garbage collection issues.
There are multiple forum posts and i also found this guide for microk8s to reset the overlay file system. Cleaning the containerd OverlayFS Directory in MicroK8s :: Martin Koníček - Personal site
i’m considering making a script that can compare folders in /var/lib/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots with the output of mount -t overlay
but that is for another day.
And i do not like deleting folders manually in there.I made a comment, linking to this thread on the pull request. We will see if that makes a difference