Rootfs, read only and st_image_core

[Eldam]

Hello ST Teams!

Question, again!

I'd like to know if the image "st-image-core" or "st-image-weston" are compatible with the "read-only-rootfs" from yocto append? (thud or dunfell)

Well I've already tried on the st-image-core and bitbake compilation failed, saying something about user-fs.

Any hints would be welcome!

Have a nice confined day!

[Olivier GALLIEN]

Hi @Eldam​ ,

I escalate your point to some expert.

In the meantime can you share exact error trace or even complete logs of the build ?

Thx

Olivier

[Eldam · Accepted solution]

Well after some attempt, i've been able to get a read only rootfs using st-image-core ans SDK2.

I've found that if I modify local.conf by adding "read-only-rootfs" in EXTRA_IMAGE_FEATURES

it cannot bitbake , stating errors about vendorfs and ldconfig

But, if i made a copy of st-image-core.bb (and rename it) and put it in my own layer (/meta-something/images/my-custom-image.bb)

i add 'read-only-rootfs' in the "image-features-part"

It bitbakes ok, and i have a rootfs in readonly mode.

The final goal is to have an almost stateless device in order to have a robust embedded device.

Next step, dive into simlink and others things!

seeya!

links that helped, in french, sorry!

https://www.blaess.fr/christophe/yocto-lab/sequence-II-2/index.html#utilisation-des-fonctionnalites-d-image

https://www.blaess.fr/christophe/yocto-lab/sequence-III-1/index.html#systeme-de-fichiers-en-lecture-seule