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Base configuration for Fedora CoreOS

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nikita-dubrovskii/fedora-coreos-config

 
 

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Fedora CoreOS Config

Base manifest configuration for Fedora CoreOS.

Use https://github.com/coreos/coreos-assembler to build it.

Discussions in https://discussion.fedoraproject.org/c/server/coreos. Bug tracking and feature requests at https://github.com/coreos/fedora-coreos-tracker.

About this repo

There is one branch for each stream. The default branch is testing-devel, on which all development happens. See the design and tooling docs for more information about streams.

All file changes in testing-devel are propagated to other branches (to bodhi-updates through config-bot, and to testing through usual promotion), with the following exceptions:

  • manifest.yaml: contains the stream "identity", such as the ref, additional commit metadata, and yum input repos.
  • lockfiles (manifest-lock.* files): lockfiles are imported from bodhi-updates to testing-devel. Overrides (manifest-lock.overrides.*) are manually curated.

Layout

We intend for Fedora CoreOS to be used directly for a wide variety of use cases. However, we also want to support "custom" derivatives such as Fedora Silverblue, etc. Hence the configuration in this repository is split up into reusable "layers" and components on the rpm-ostree side.

To derive from this repository, the recommendation is to add it as a git submodule. Then create your own manifest.yaml which does include: fedora-coreos-config/ignition-and-ostree.yaml for example. You will also want to create an overlay.d and symlink in components in this repository's `overlay.d.

Adding packages to the OS

Since testing-devel is directly promoted to testing, it must always be in a known state. The way we enforce this is by requiring all packages to have a corresponding entry in the lockfile.

Therefore, to add new packages to the OS, one must also add the corresponding entries in the lockfiles:

  • for packages which should follow Bodhi updates, place them in manifest-lock.$basearch.json
  • for packages which should remain pinned, place them in manifest-lock.overrides.$basearch.yaml

There will be better tooling to come to enable this, though one easy way to do this is for now:

  • add packages to the correct YAML manifest
  • run cosa fetch --update-lockfile
  • commit only the new package entries

Moving to a new major version of Fedora

Updating this repo itself is easy:

  1. bump releasever in manifest.yaml
  2. update the repos in manifest.yaml if needed
  3. run cosa fetch --update-lockfile
  4. PR the result

Though there are also some releng-related knobs that may need changes:

  1. verify that the f${releasever}-coreos-signing-pending Koji tag has been created
  2. update RoboSignatory config so that:

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Base configuration for Fedora CoreOS

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