Monitor hard resets and restore device to pristine state

eellak / epidose

Privacy-preserving epidemic dosimeter based on DP-3T contact tracing

Apache License 2.0

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Monitor hard resets and restore device to pristine state #37

Open dspinellis opened 4 years ago

dspinellis commented 4 years ago

On boot check if /var/lib/epidose/restore exists, and if so, perform a clean installation
On boot create /var/lib/epidose/restore to indicate that a full restore is needed
On a graceful shutdown remove /var/lib/epidose/restore

The procedure for running these commands is described here.

konasimakopoulos commented 4 years ago

In order to help with restoring the device to a pristine state, one could use a special initramfs that checks the root partition and either loads linux from an image or a different partition, or repairs the root partition using an included rootfs image (for example as a tar.gz file on the boot partition). For example: https://unix.stackexchange.com/questions/460219/how-to-run-a-script-before-switch-root-in-initramfs

A different approach could be a second stage bootloader (for example u-boot) but that could complicate things.