SPR Image

Build custom SPR image for raspi/arm64

IMPORTANT write-sd.sh will write to /dev/mmcblk0. If you are writing to a usb or other device you need to change this before running build.sh or write-sd.sh! IMPORTANT

Build

./bin/build.sh

or run them individually:

./bin/download-img.sh
./bin/mount-img.sh
./bin/mod.sh
./bin/write-sd.sh

Download

download ubuntu here: https://ubuntu.com/download/raspberry-pi/thank-you?version=21.10&architecture=server-arm64+raspi https://ubuntu.com/download/raspberry-pi/thank-you?version=22.04&architecture=server-arm64+raspi

or use ./bin/download-img.sh

current state

we modify /etc and other things to run ok. todo: * install packages * disabled systemd-resolved * FULL image: add spr and install everything - setup in webui or .sh

this is the default mode where we have uplink on eth0 and use wlan0 --> so have two images: * spr [config wizard + pull spr from install script] * sprpi [eth0 + wlan0 + spr in image]

random notes

have a init.sh as entry when running the container that runs git clone spr better to have this here - dont have to build the main image every time there is a update

TODO - Note on network config

mkdir boot
sudo mount $LOOP_BOOT ./boot
sudo cp network-config boot/network-config
sudo umount ./boot
rm -rf boot

content:

version: 2
ethernets:
  eth0:
    dhcp4: true
    optional: true
wifis:
  wlan0:
    dhcp4: true
    optional: true
    access-points:
      myhomewifi:
        password: "S3kr1t"

Modify image using docker

export IMG=ubuntu-22.04-preinstalled-server-arm64+raspi.img
export IMG_SPR=spr-arm64+raspi.img

unxz $IMG.xz
sudo -E losetup -Pf $IMG
sudo -E losetup -j $IMG
mkdir fs

#TODO parse loop dev here.
export LOOP=/dev/loop6
export LOOP_ROOT="${LOOP}p2"
export LOOP_BOOT="${LOOP}p1"

sudo mount $LOOP_ROOT ./fs
sudo tar -cf root.tar -C ./fs .
sudo chown ubuntu:ubuntu ./root.tar
docker import ./root.tar spr:base

export image when modified

CONTAINER=$(docker run -d spr:image bash)
docker export $CONTAINER > custom-root.tar

sudo -E mkfs.ext4 -F $LOOP_ROOT
sudo -E mount $LOOP_ROOT ./fs
sudo tar xf ./custom-root.tar -C ./fs
sudo umount ./fs
sudo losetup -d $LOOP
sudo -E mv $IMG $IMG_SPR

#TODO cleanup

xzcat ubuntu-22.0-4-preinstalled-server-arm64+raspi.img.xz | dd of=/dev/rdisk2 bs=$[1024*1024]
dd if=ubuntu-22.0-4-preinstalled-server-arm64+raspi.img of=/dev/rdisk2 bs=$[1024*1024]