Are you sure overlay2 doesn’t work for Docker in an LXC container on Proxmox?
I edited the /etc/modules-load.d/modules.conf file to say just overlay - rebooted the Proxmox host and went through the steps of selecting overlay2 as the storage driver for the Docker LXC container. Restarted the service, typed docker info and it shows that it’s working:
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: false
This is all on Proxmox 6, so I assume overlay2 works correctly? Or would I need to edit /etc/modules-load.d/modules.conf to say overlay2 instead of overlay?