This repository contains all the bits to get a working Ostree for Rocky Linux (8.6). Although Fedora and Red Hat CoreOS use (rpm)Ostree, this is NOT a CoreOS clone.

If you want to build a Rocky Linux CoreOS, in other words a Red Hat CoreOS clone, then checkout coreos-assembler. Other sites with information about CoreOS and building custom OStree(s):

• https://coreos.github.io/rpm-ostree/compose-server/
• https://www.osbuild.org/

Especially osbuild is a very nice project/tool which is now incorperated in the more recent Red Hat versions.

Contains an Ansible playbook to configure a PXE bootserver

Contains the config files to build a basic Ostree for Rocky Linux

From the root directory of this project:

• Create a build directory with the repo and cache directory below it. The repo directory will have the final OStree repository where you could boot from.
• Initialize the ./build/repo directory as a OStree repository
• Build the OStree repo

mkdir -p ./build/{repo,cache}
ostree --repo=./build/repo init --mode=archive
sudo rpm-ostree --unified-core compose tree  --cachedir=./build/cache  --repo=./build/repo config/manifest.yaml

When the compose state is finished, rsync the repo to the bootserver and network boot from it.

sudo rsync -av --delete ./build/repo [email protected]:/var/www/html/ostree/