Root overlay location incorrect
JeremyAshton opened this issue · 5 comments
I was digging into the root overlay option and found the README.md should be referencing /overlay/root_ro/mnt/data/udm-kernel-tools/root and not /mnt/data/udm-kernel-tools/root.
Well, both directories should be the same.
In UbiOS, you should have mount at /mnt/data, which is where you can create these directory for the root overlay.
Once the system boots into the custom kernel, the root filesystem is mounted at /overlay/root_ro (with the data mount at /overlay/root_ro/mnt/data. However, after that, a read-write overlay of the rootfs is mounted as /.
In essence, this means that /mnt/data and /overlay/root_ro/mnt/data point to the same thing.
Fair enough. I guess I was confused a bit initially as I had to mkdir -p /overlay/root_ro/mnt/data/udm-kernel-tools/root and then it would mount correctly afterwards. As in: https://github.com/fabianishere/udm-kernel-tools/blob/32f0816089c5187f4ff13e3c68f9ea2f6325c591/udm-init#L145-147
Good point. I think we should mention that in the documentation.
Were you getting any errors before creating the directory or did it just not show up?
No errors. The directory structure was simply not there until the directories were created and a reboot occured.
Great, thanks for the info!
If you have the time, you can update your PR to include these steps. However, no worries if you don’t! Then I’ll update it at some point.