diskimage-builder/releasenotes/notes/centos-retired-f17ae9f6f03e57e3.yaml

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Remove centos and rhel elements Several people have popped up in IRC recently with failures in these elements. Without Python 2.7 available in the image they are unsupported (OpenStack hasn't supported it for a long time). Remove these to avoid further confusion. The centos/centos7 DISTRO split that has happened with centos-minimal is unfortunate but I don't think it helps to rename centos7/rhel7 ATM. To summarise; DISTRO=centos7 means image based build, DISTRO=centos && DIB_RELEASE=7 means the minimal build. In the future, I think it is important that the minimal builds and image builds set the same DISTRO. This reflects that "upper" layers shouldn't care about the exact building of the lower layers. I see CentOS 8 going one of two ways 1) the changes are so significant, we start separate centos8 / centos8-minimal elements. They both set DISTRO=centos8 (and DIB_RELEASE to point-release maybe?). This means we have to update all "if DISTRO == centos || DISTRO == centos7" branches to also check for "centos8". Evenually (!) "centos" goes away for versioned DISTRO only 2) we restore centos element with DISTRO=centos and DIB_RELEASE=8, and centos-minimal remains the same. This means we have to audit all "if DISTRO == centos" calls to make sure they're appropriate for version 8 (stick a "&& DIB_RELEASE=7" on them all basically). I'm not sure we can fully decide until we start to see excatly how the distro switching/matching bits look, but (2) is consistent with Ubuntu and probably the preferred solution. Some "rhel" parts have been cleaned up. More could be done in rhel-common, but given our lack of coverage of that I'd prefer to leave it for now. Change-Id: I6ea784116ef59ca22878c8512c963f29c815a00a
2017-06-28 00:55:53 +00:00
---
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.