rpi3b+ -->> SERIAL_NUMBER=76d2a334rpi4b -->> SERIAL_NUMBER=ac8854ec
Using a Dell laptop 6.1.71-1-MANJARO over wifi to serve tftp and nfs
Very useful information : RPI Network Boot
Go to RPI OS to download and extract your image.
sudo kpartx -va 2023-12-11-raspios-bookworm-arm64-lite.img
sudo mkdir -v /pxe
sudo mount -v /dev/mapper/loop0p2 /pxe
sudo mount -v /dev/mapper/loop0p1 /pxe/boot/firmware
sudo mkdir -v /srv/tftp/$SERIAL_NUMBER
sudo mount -v -o bind /pxe/boot/firmware /srv/tftp/$SERIAL_NUMBER
When booting, rpi3b+ looks for bootcode.bin in the parent directory, i.e., /srv/tftp. See the network-booting link above that describes the difference between rpi3 and rpi4 and why this is needed.
sudo cp /srv/tftp/76d2a334/bootcode.bin /srv/tftp/bootcode.bin
Export the NFS mounts and start dnsmasq. Optionally, reload config when changing mount information
sudo systemctl daemon-reload # only needed when changing config
sudo systemctl start dnsmasq
sudo exportfs -a
In the meantime, on the server, run on another screen to watch if the system tries to download files. If it works, then you will see failure messages, but then success messages. It takes more than a few minutes over a wifi nfs mount, but it works.
journalctl -fex
If it succeeds on the server machine, then you will see messages on the client machine where the control is transferred.
This means that depending on your configuration, dnsmasq won't be needed anymore.
Warning
Make sure to avoid any confusion and make backups of these files before working on live systems :
- On the client:
- /etc/fstab
- /boot/cmdline.txt
- On the server:
- /etc/exports
- /etc/dnsmasq.conf
Note
Edit /etc/fstab /boot/cmdline.txt on the client system (directly through the mounts done above)
/boot/cmdline.txt:
console=serial0,115200 console=tty1 root=/dev/nfs nfsroot=192.168.0.206:/pxe,vers=3 rw ip=dhcp rootwait elevator=deadline
/etc/fstab :
192.168.0.206:/pxe / nfs defaults,vers=3 0 0
192.168.0.206:/pxe/boot/firmware /boot/firmware nfs defaults,vers=3 0 0
/etc/exports:
/srv/tftp *(rw,sync,no_subtree_check,no_root_squash)
/pxe/boot/firmware *(rw,sync,no_subtree_check,no_root_squash)
/pxe *(rw,sync,no_subtree_check,no_root_squash)
/etc/dnsmasq.conf :
interface=*
dhcp-range=192.168.0.10,192.168.0.50,12h
log-dhcp
enable-tftp
tftp-root=/srv/tftp
pxe-service=0,"Raspberry Pi Boot"
sudo systemctl stop dnsmasq
sudo umount -v /srv/tftp/$SERIAL_NUMBER
sudo umount -v /pxe/boot/firmware
sudo umount -v /pxe
sudo rmdir -v /pxe
sudo kpartx -vd 2023-12-11-raspios-bookworm-arm64-lite.img
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