---
upgrade:
  - |
    Explicit support for CoreOS Ironic Python Agent images has been
    removed. If you use a ramdisk based on CoreOS, you may want to re-add
    ``coreos.configdrive=0`` to your PXE templates, see `story 1433812
    <https://storyboard.openstack.org/#!/story/1433812>`_ for the background.