Has any successfully built an image for Ubuntu Server that includes support NFS server? To do that, CONFIG_NFSD has to be set, and it is not set in the December 2018 image. While I understand the kernel build process in general, and have done it for more standard Linux platforms, I’d like to avoid the steep learning curve that is likely involved with building kernels for Rock Pi.
FYI: CONFIG_NFSD is needed because it enables support for proc-fs-nfsd, the pseudo-filesystem that makes /proc/fs/nfsd work. Without it, nfsd-kernel-server does not initialize.