Question: how to pxe boot raspberry pi?
Answer: Update Raspbian and install rpi-eeprom, rsync and dnsmasq. Create the NFS, tftp boot directories and create our base netboot filesystem. Configure the PXE server to use a static IP. Configure dnsmasq for PXE boot. Configure the NFS exports on the PXE boot server. Configure the /etc/fstab to mount via NFS.