Notes about OSTREE operating systems

Fedora Atomic

Treefile → rpm-ostree → Container Image → Registry Upload → bootc-image-builder → osbuild → Bootable Disk Image

rpm-ostree
bootc base-images
bootc-image-builder
osbuild packages ( source code )

Documentation

ostree
bootc
Creating bootc images from scratch

Other

Liri OS

Liri OS is available as an immutable tree with reliable updates and easy rollbacks.
Right now the live image installs a traditional, package-based system, but if you are running Fedora Silverblue you can try the rpm-ostree based version of Liri OS today.
First of all add the remote and pull the latest version:

ref=lirios/unstable/x86_64/desktop
ostree remote add --no-gpg-verify liri https://repo.liri.io/ostree/repo/
ostree pull liri:$ref
ostree admin os-init lirios
ostree admin deploy --os=lirios --karg-proc-cmdline liri:$ref
checksum=$(ostree rev-parse $ref)
for i in /etc/passwd /etc/group /etc/shadow /etc/fstab \
         /etc/default/grub /etc/locale.conf \
         /etc/ostree/remotes.d/liri.conf; do
    cp $i /ostree/deploy/lirios/deploy/${checksum}.0/$i
done

If you have a separate /home mount point, you'll need to change that fstab copy to refer to /var/home.
If you don't have a separate /home mount point, then you need to make sure that a symlink will be created:

echo 'L /var/home - - - - ../sysroot/home' > /ostree/deploy/lirios/deploy/${checksum}.0/etc/tmpfiles.d/00rpm-ostree.conf

and copy your home directory from the fedora-workstation deployment:

cp -a /sysroot/ostree/deploy/fedora-workstation/var/home/<USERNAME> /sysroot/ostree/deploy/lirios/var/home

(Replace with your actual username)

Debian official info

Debian ostree-boot-examples

man files

EndlessOS

deb-ostree-builder
https://github.com/endlessm/eos-image-builder
eos-updater
https://github.com/endlessm/eos-boot-helper

Apertis

https://www.apertis.org/guides/image_devel/ostree
https://www.apertis.org/guides/image_devel/how_to_build_your_first_image/
https://gitlab.apertis.org/pkg/apertis-update-manager
https://gitlab.apertis.org/pkg/apertis-dev-tools
https://gitlab.apertis.org/pkg/apertis-customizations
https://gitlab.apertis.org/pkg/apertis-archive-keyring
https://gitlab.apertis.org/pkg/apertis-flatdeb
https://gitlab.apertis.org/pkg/apertis-hawkbit-agent
https://gitlab.apertis.org/pkg/apertis-tests

Debian/apt

apt2ostree
LWN article Merkle trees and build systems

Debian Atomic (unproven) Cant make a bootable disk

Treefile → apt-ostree → Container Image → Registry Upload → deb-bootc-image-builder → debian-forge → Bootable Disk Image

debian-atomic tree files apt-ostree An attempt at 1:1 implementation of rpm-ostree
deb-bootc-image-builder A fork of bootc-image-manager
debian-forge Project name of a fork of osbuild
debian-bootc-base-images A fork of Fedora's bootc-base-images

Distrobution build tools

debos is a tool-chain for simplifying the process of building a Debian-based OS image.
Fedora coreos-assembler aka COSA Boot Loader Specification (BLS)