Docker will not run well with the default zfs file system
lxc storage create docker btrfs
lxc launch images:ubuntu/20.04 demo
lxc storage volume create docker demo
lxc config device add demo docker disk pool=docker source=demo path=/var/lib/docker
lxc config set demo security.nesting=true security.syscalls.intercept.mknod=true security.syscalls.intercept.setxattr=true