This is a constantly updating template repository for creating a native container image designed to be customized however you want. GitHub will build your image for you, and then host it for you on ghcr.io. You then just tell your computer to boot off of that image. GitHub keeps 90 days worth image backups for you, thanks Microsoft!
For more info, check out the uBlue homepage and the main uBlue repo
See the Make Your Own -page in the documentation for quick setup instructions for setting up your own repository based on this template.
Don't worry, it only requires some basic knowledge about using the terminal and git.
Note Everywhere in this repository, make sure to replace
odintdh/testjel
with the details of your own repository. Unless you usedcreate-ublue-image
, in which case the previous repo identifier should already be your repo's details.
Warning To start, you must create a branch called
live
which is exclusively for your customizations. That is the only branch the GitHub workflow will deploy to your container registry. Don't make any changes to the original "template" branch. It should remain untouched. By using this branch structure, you ensure a clear separation between your own "published image" branch, your development branches, and the original upstream "template" branch. Periodically sync and fast-forward the upstream "template" branch to the most recent revision. Then, simply rebase yourlive
branch onto the updated template to effortlessly incorporate the latest improvements into your own repository, without the need for any messy, manual "merge commits".
The easiest way to start customizing is by looking at and modifying recipe.yml
. It's documented using comments and should be pretty easy to understand.
For the base-image field, you can use any other native container image. You will get all the features of that image, plus the ones added here! Check out the uBlue images list to decide what to use!
If you want to add custom configuration files, you can just add them in the usr/etc/
directory, which is the official OSTree "configuration template" directory. If you need to add other directories, you can look at the Containerfile to see how it's done. Writing to /etc
or /var
in Fedora's immutable OSTree-based distros isn't supported and will not work, as those are user-managed locations!
Note The configuration files you put in
/usr/etc/
will automatically be applied to your local/etc/
bysystemd
whenever you rebase an OSTree system or update the image. If a config file in/etc/
has been modified (compared to the same deployment's defaults), then OSTree won't overwrite it, but the new version will be available in/usr/etc/
. Runsudo ostree admin config-diff
to see the difference between/etc/
and/usr/etc/
(man ostree-admin-config-diff
for further documentation).
If you want to execute custom shell scripts or commands in the image build, you shouldn't edit the scripts/build.sh
or the Containerfile
directly.
Instead, you should create your own custom shell scripts in the scripts/
directory (look at the example.sh
). After creating your scripts, enable them in the scripts:
section of your recipe.yml
, within the specific "build stage" category where the scripts are intended to be executed. Alternatively, enable the autorun.sh
helper script in your recipe to automatically execute your custom scripts.
Read the README in the scripts/
directory for more information.
If you want to add custom package repositories to your image, you can include them in the recipe.yml
as a list of URLs under the rpm.repos:
section. They must be proper .repo
files (such as https://copr.fedorainfracloud.org/coprs/atim/starship/repo/fedora-38/atim-starship-fedora-38.repo
). In the build process, the .repo
file will be downloaded and placed inside /etc/yum.repos.d/
where rpm-ostree can access it.
You can use this to add COPR repositories to your image. COPR is like the Arch User Repository for Fedora, where you can find extra packages that wouldn't otherwise be available. The repositories are community-created, so use them at your own risk. Read more
Tip: You can use the magic string %FEDORA_VERSION%
in your repo URLs, to automatically refer to the correct repository for your current Fedora version.
You can build multiple images using multiple recipe.yml
files. They will share the Containerfile and everything else, but things like packages declared in the recipe will be different between the images. For a more robust multibuild setup, you could consider forking from the ublue-os/main repo, which was built from the purpose.
In order to build multiple recipes, you need to declare each one below line ~33 in build.yml
. The files should be in the root of the repository.
Example: Adding a new recipe called recipe-2.yml
(snippets from the matrix
section of build.yml
)
Before:
matrix:
recipe:
- recipe.yml
After:
matrix:
recipe:
- recipe.yml
- recipe-2.yml
yafti
is the uBlue "first boot" installer. It shows up the first time a user logs into uBlue. By default, the menu also shows up again anytime the image's yafti configuration differs from the user's last encounter, so feel free to expand or modify your custom image's yafti configuration over time. Your users will then see the yafti menu again after the OS update, and will be given a chance to install any new additions.
Its configuration can be found in /usr/share/ublue-os/firstboot/yafti.yml
of the installed OS. It includes an optional selection of Flatpaks to install, along with a new group that's automatically added for all Flatpaks declared in recipe.yml
. You can look at what's done in the yafti.yml
config and modify it to your liking (in the repository, before building the image, since the installed system file is immutable).
If you want to completely disable yafti, simply set the recipe's firstboot.yafti
flag to false
, which then removes all yafti-related files and configurations from your final image. The files in usr/share/ublue-os/firstboot/
are responsible for automatically running yafti at login, and they will only be bundled in your image if yafti
is enabled in your recipe!
Warning This is an experimental feature and should not be used in production, try it in a VM for a while!
To rebase an existing Silverblue/Kinoite installation to the latest build:
sudo rpm-ostree rebase ostree-unverified-registry:ghcr.io/odintdh/testjel:latest
This repository builds date tags as well, so if you want to rebase to a particular day's build:
sudo rpm-ostree rebase ostree-unverified-registry:ghcr.io/odintdh/testjel:20230403
The latest
tag will automatically point to the latest build. That build will still always use the Fedora version specified in recipe.yml
, so you won't get accidentally updated to the next major version.
The just
task runner is included in ublue-os/main
-derived images, and we have provided several template commands which help you perform further customization after first boot.
You can merge our template justfiles into your own local configuration. When just
supports include directives, you will instead be able to simply include these paths into your own justfile, without having to copy anything manually.
Run the following commands when you're logged into the operating system, to merge uBlue's provided configurations into your own user config. (The "touch" command is only necessary on certain shells which won't let you merge into non-existent files.)
touch ~/.justfile
cat /usr/share/ublue-os/just/main.just >> ~/.justfile
cat /usr/share/ublue-os/just/custom.just >> ~/.justfile
After doing that, you'll be able to run the following commands:
just
- Show all tasks, more will be added in the futurejust bios
- Reboot into the system bios (Useful for dualbooting)just changelogs
- Show the changelogs of the pending update- Set up distroboxes for the following images:
just distrobox-boxkit
just distrobox-debian
just distrobox-opensuse
just distrobox-ubuntu
just setup-flatpaks
- Install all of the flatpaks declared in recipe.ymljust setup-gaming
- Install Steam, Heroic Game Launcher, OBS Studio, Discord, Boatswain, Bottles, and ProtonUp-Qt. MangoHud is installed and enabled by default, hit right Shift-F12 to togglejust nix-me-up
- Install Nix with dnkmmr69420's Nix Silverblue install scriptjust update
- Update rpm-ostree, flatpaks, and distroboxes in one command
Check the just website for tips on modifying and adding your own recipes.
These images are signed with sisgstore's cosign. You can verify the signature by downloading the cosign.pub
key from this repo and running the following command:
cosign verify --key cosign.pub ghcr.io/odintdh/testjel
If you're forking this repo, the uBlue website has instructions for setting up signing properly.