Teach bootloader.rs how to detect and install systemd-boot (trivial)
Have a mode where we basically drop all the ostree stuff out of the container image...we make a merged composefs client side from the container image content and for good measure just do all the selinux labeling client side to start (ref https://github.com/ostreedev/ostree-rs-ext/issues/510 - though we could also start honoring security.selinux in the tar stream)
Deploying an image also copies the UKI out into the ESP (and we use the UKIs as a garbage collection root for the objects)
For /etc it is tempting to try switching to what flatcar does by default where we change to using an overlayfs for /etc with the lowerdir, but we could also automatically do the /usr/etc handling in our image (reusing the ostree code...either way); a challenge in this is we document configuring things in ostree-prepare-root.conf today but we could start parsing those options in bootc instead.
We could hence then potentially start by dropping ostree-prepare-root.service from the initramfs and have a spike on what it'd look like to move the mount logic in the initramfs maybe in this project.
systemd-boot has a lot of uptake and is very simple for the UEFI path. We need to support it.
One thing this deeply intersects with is https://github.com/ostreedev/ostree/issues/2753 and https://github.com/ostreedev/ostree/issues/1951 as well as https://github.com/containers/bootc/issues/20
I think with the new https://github.com/containers/composefs/issues/332 we could try doing a "big bang" where we:
security.selinuxin the tar stream)/etcit is tempting to try switching to what flatcar does by default where we change to using an overlayfs for/etcwith the lowerdir, but we could also automatically do the/usr/etchandling in our image (reusing the ostree code...either way); a challenge in this is we document configuring things inostree-prepare-root.conftoday but we could start parsing those options in bootc instead.ostree-prepare-root.servicefrom the initramfs and have a spike on what it'd look like to move the mount logic in the initramfs maybe in this project.