run.sh

#!/bin/bash

#set -x 

IMG_URL="http://downloads.raspberrypi.org/raspios_lite_armhf/images/raspios_lite_armhf-2022-01-28/2022-01-28-raspios-bullseye-armhf-lite.zip"
IMG_PATH="$HOME/dockerpi3_image"
FILENAME=$(basename $IMG_URL)
NAME=$(basename $IMG_URL .zip)
FILEPATH="${IMG_PATH}/${NAME}.img"
IMG_RESIZE="8G"
PROCESSORS="4" 

if [ ! -d "${IMGPATH}" ]; then
  mkdir -p ${IMG_PATH}
fi

if  [ ! -f "${IMG_PATH}/${FILENAME}" ] 
  then 
  wget -O "${IMG_PATH}/${FILENAME}" "${IMG_URL}"
fi 

if [ ! -f "${IMG_PATH}/${NAME}.img" ]
  then
    unzip -q "${IMG_PATH}/${FILENAME}" -d "${IMG_PATH}" 
    qemu-img resize -f raw "${FILEPATH}" "${IMG_RESIZE}" 

    # Find the first, DOS partition and mount it
    BOOTSTART=`fdisk -l "${FILEPATH}" | sed -nr "s/^\S+1\s+([0-9]+).*  c W95 FAT32 \(LBA\)$/\1/p"`

    if [[ -z "${BOOTSTART}" ]]; then
      echo "Can't find FAT32 first partition in image \"{$FILEPATH}\""
      exit
    fi

    sudo losetup /dev/loop100 "${FILEPATH}" -o $((BOOTSTART*512))
    sudo mkdir rpi-boot
    sudo mount /dev/loop100 rpi-boot

    # Make the change
    if [[ -e "rpi-boot/ssh" ]]; then
      echo "\"`basename "${FILEPATH}"`\" ALREADY had boot/ssh set."
    else
      sudo touch rpi-boot/ssh
      echo "\"`basename "${FILEPATH}"`\" now has boot/ssh set."
    fi

    # Unmount and clear up
    sudo umount rpi-boot
    sudo rmdir rpi-boot
    sudo losetup -d /dev/loop100		
fi 

# Start dockerpi3 
docker run -p 5022:22 --rm -v "${IMG_PATH}/${NAME}.img":/sd.img  \
  --name rpi -it clutroth/dockerpi:vmlatest \
  -m 1024 -smp ${PROCESSORS} -M raspi3 \
  -kernel kernel8.img -dtb bcm2710-rpi-3-b-plus.dtb -sd /sd.img \
  -append "console=ttyAMA0 root=/dev/mmcblk0p2 rw rootwait rootfstype=ext4" \
  -nographic \
  -device usb-net,netdev=net0 -netdev user,id=net0,hostfwd=tcp::22-:22