github flatcar/scripts alpha-3794.0.0
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latest releases: lts-3510.3.3-nightly-20240531-2100, main-3984.0.0-weekly-updates-2, stable-3815.2.3-nightly-20240530-2100...
6 months ago

This release removes the legacy "torcx" image customisation and replaces this feature with systemd-sysext. Torcx enabled users to deploy custom docker versions; however, it required special packaging using the Flatcar SDK. Please refer to the "Changes" section below for details.

This release ships a major Docker update: Docker was upgraded to version 24 (from version 20 in the previous release). Please see the "Changes" section below for details.

Changes since Alpha 3760.0.0

Security fixes:

Bug fixes:

  • Fixed iterating over the OEM update payload signatures which prevented the AWS OEM update to 3745.x.y (update-engine#31)
  • Made sshkeys.service more robust to only run coreos-metadata-sshkeys@core.service when not masked and also retry on failure (init#112)
  • Set TTY used for fetching server_context to RAW mode before running cloudinit on cloudsigma (scripts#1280)

Known issues:

  • docker and containerd packages information are missing from flatcar_production_image_packages.txt (flatcar#1260)

Changes:

  • Torcx, the mechanism to provide a custom Docker version, was replaced by systemd-sysext in the OS image. Learn more about sysext and how to customise OS images here.
    • Torcx entered deprecation 2 years ago in favour of deploying plain Docker binaries
      (which is now also a legacy option because systemd-sysext offers a more robust and better structured way of customisation, including OS independent updates).
    • Torcx has been removed entirely; if you use Torcx to extend the Flatcar base OS image, please refer to our conversion script and to the sysext documentation mentioned above for migrating.
    • Consequently, update_engine will not perform torcx sanity checks post-update anymore.
    • Relevant changes: scripts#1216, update_engine#30, Mantle#466, Mantle#465.
  • cri-tools, runc, containerd, docker, and docker-cli are now built from Gentoo upstream ebuilds. Docker received a major version upgrade - it was updated to Docker 24 (from Docker 20; see "updates").
    • NOTE: The docker btrfs storage driver has been de-prioritised; BTRFS backed storage will now default to the overlay2 driver
      (changelog, upstream pr).
      Using the btrfs driver can still be enforced by creating a respective docker config at /etc/docker/daemon.json.
    • NOTE: If you are already using btrfs-backed Docker storage and are upgrading to this new version, Docker will automatically use the btrfs storage driver for backwards-compatibility with your deployment.
      • Docker will remove the btrfs driver entirely in a future version. Please consider migrating your deployments to the overlay2 driver.
  • Brightbox: The regular OpenStack image should now be used, it includes Afterburn for instance metadata attributes
  • OpenStack: An uncompressed image is provided for simpler import (since the images use qcow2 inline compression, there is no benefit in using the .gz or .bz2 images)

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