ro_raspi3_fs/README.md

Docker RO effort

Create base image, simpel

dd if=./2021-01-11-raspios-buster-armhf-lite.img of=/dev/sda status=progress touch ssh -> boot partition sudo apt-get update sudo apt-get upgrade

making a RO overlay root fs => enable it in raspi-config

Mounting root as RW?

sudo losetup -f /dev/mmcblk0p2 sudo mount -o rw /dev/loop0 /mnt

If you need to mount / update

chroot /mnt mount -t proc /proc proc/ mount --rbind /sys sys/ mount --rbind /dev dev/

Docker's overlay2 needs to be a tmpfs, in fact, docker wants to do some

mambo-jumbo inside and does not want overlay, need tmpfs

sudo mount -t tmpfs tmpfs /var/lib/docker need to copy contents of overlay2?

sudo mount -t tmpfs tmpfs /var/lib/docker sudo cp -r /mnt/var/lib/docker /var/lib/

cp -r /var/lib/docker/* /mnt/var/lib/docker

1, UART > HW 2, GSM - generic - ip config / reboot / setup / 3, wahtchdog mod (added?) 4, BalenaOS, alternativy