Fedora CoreOS rebasing to Fedora Linux 43

Fedora Linux 43 was released today [1]. The Fedora CoreOS testing
stream has been rebased and is currently rolling out. This update
will come to the stable stream in a few weeks.

As of Fedora 43 updates are now built via a container workflow [2] and
exclusively shipped via the quay.io/fedora/fedora-coreos container
registry. This means updates no longer exist in the OSTree repo
at https://ostree.fedoraproject.org [3].

For other Fedora 43 related changes you can see the full list of Fedora
Project changes [4] and the Fedora CoreOS analysis of each change [5].
There are a few of these changes we’d like to highlight:

  • The iptables-legacy RPM will be dropped. Any systems still using
    the iptables-legacy backend will be migrated to iptables-nft [6].
  • The Qualcomm (qcom) dtb files on aarch64 (arm64) have been removed [7].
    This helps ease the pressure surrounding our limited disk space in /boot.
  • The GRUB bootloader and shim software are now updated by default on
    every boot [8][9]. This ensures our bootloader stays up to date.

Please test out the testing stream over the coming weeks and report any
issues in our issue tracker [10].

Dusty Mabe, for the Fedora CoreOS team


  1. Fedora Linux 43 is here! - Fedora Magazine ↩︎

  2. Changes/BuildFCOSUsingContainerfile - Fedora Project Wiki ↩︎

  3. Changes/CoreOSStopPublishingOSTree - Fedora Project Wiki ↩︎

  4. Releases/43/ChangeSet - Fedora Project Wiki ↩︎

  5. tracker: Fedora 43 changes considerations · Issue #1934 · coreos/fedora-coreos-tracker · GitHub ↩︎

  6. Migrate existing systems to `iptables-nft` and remove `iptables-legacy` · Issue #1818 · coreos/fedora-coreos-tracker · GitHub ↩︎

  7. fcos.upgrade.basic test fails due to insufficient space on boot partition · Issue #2004 · coreos/fedora-coreos-tracker · GitHub ↩︎

  8. Changes/AutomaticBootloaderUpdatesBootc - Fedora Project Wiki ↩︎

  9. Enable automatic bootloader updates · Issue #1468 · coreos/fedora-coreos-tracker · GitHub ↩︎

  10. GitHub · Where software is built ↩︎

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