monok8s

Kubernetes image for Mono Gateway Development Kit

https://docs.mono.si/gateway-development-kit/getting-started

DISCLAIMER

USE AT YOUR OWN RISKS. I leverage ChatGPT heavily for this. I am testing them all by myself right now.

The device's dts files are located at here

https://github.com/we-are-mono/OpenWRT-ASK/tree/mono-25.12.0-rc3/target/linux/layerscape/files/arch/arm64/boot/dts/freescale

• We need both mono-gateway-dk-sdk.dts and mono-gateway-dk.dts since the sdk one includes the non-sdk one.
• The actual dts being used is the mono-gateway-dk-sdk.dts

Build

Find the latest package versions and update build.env

• kernel
• busybox
• CRI-O
• Kubelet

Then run

make release

Making sub stages

make build-base # The image the builds kernel and everything
make kernel     # Builds our kernel from NXP
make initramfs
make itb        # Builds out/board.itb (contains the kernel and the initramfs)

Architecture

• A/B deployment
• Read-only OS

Upgrade process

Rough idea

./configure
# - asks for some config for kubelet
# - Join a cluster? Start a cluster?

make release

# Copy the new image to the upgrade-scheduler
kubectl cp -n kube-system upgrade-scheduler:/tmp/upgrade.img

# Upgrade scheduler reads the file that issue a self-reboot
reboot

# uboot to boot into partition B

PENDING

tftp (network is required)

setenv ipaddr 10.0.0.153
setenv serverip 10.0.0.129
tftp 0x80000000 board.itb

USB Flashing

1. Copy board.itb into an SDCard
2. Copy [RELEASE_NAME].img.gz into an SDCard

usb start
usb tree
fatls usb 0:1   # For fat
ext4ls usb 0:1  # For ext4
fatload usb 0 0x80000000 board.itb

setenv bootargs "console=ttyS0,115200 earlycon=uart8250,mmio,0x21c0500 root=/dev/ram0 rootwait rw"
bootm 0x80000000

3. Inside initramfs

mount /dev/sda /mnt
gunzip -c /mnt/[RELEASE_IMAGE].img.gz | dd of=/dev/mmcblk0
reboot -f

4. If it boots, create the A/B deployment scheme

• (WORK IN PROGRESS)