I tried overlayroot - seems completely not working (seems that it depends on initramfs that does not exists on Ubuntu 16.04.2 with kernel 4.4.70).
Is there any other rather simple option to have readonly rootfs?
I need a setup where the fs that come with microsd is readonly + tmpfs writable layout.
Overlayroot, which is one of the options to have a quick virtual read only fs, works on our Ubuntu OOB, overlayfs has to be enabled in kernel at minimum, perhaps something else.
This is what I see in different ubuntu installation (not bpi):
$ apt-cache search overlayroot
overlayroot - use an overlayfs on top of a read-only root filesystem
Anyway, HDMI is a must for me, so armbian cannot be used (at least for now).
This is normal. overlayfsroot is not an armbian application. It’s working only with Ubuntu. We tried to port it to Debian, but it was to much problems and the project was abandoned. If you want to use this app, you need to start with Ubuntu package relation … or try to bring this together manually.