---
deprecations:
  - |
    The ``centos`` and ``rhel`` elements have been removed.  These
    were building version 6 which is no longer supported (mostly due
    to a lack of python 2.7).  Version 7 support is available via the
    ``centos7`` and ``rhel7`` elements (which downloads and modifies
    the upstream cloud images) or via ``centos-minimal`` (which builds
    the image from a empty chroot; only available for CentOS).
    ``centos-minimal`` is suggested as this is what OpenStack
    Infrastructure uses for its elements.

    Unfortunately, ``centos-minimal`` sets ``DISTRO=centos`` while
    ``centos7`` sets ``DISTRO=centos7``, despite building the same
    thing as far as upper levels are concerned.  We plan to rectify
    this in the version 8 time-frame.