diskimage-builder/diskimage_builder/elements/epel/pre-install.d/05-rpm-epel-release
Ian Wienand a00d02f6a1 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 12:26:24 +10:00

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#!/bin/bash
if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
if [[ ${DISTRO_NAME} =~ "centos" ]]; then
# Centos has "epel-release" in extras, which is default enabled.
yum install -y epel-release
else
# For RHEL, we have to scrape the download page to find the latest
# release and install that
[ -n "$ARCH" ]
if [ 'amd64' = "$ARCH" ] ; then
ARCH="x86_64"
fi
BASE_URL=${DIB_EPEL_MIRROR:-https://dl.fedoraproject.org/pub/epel}
case "$DISTRO_NAME" in
rhel7)
RELEASE=7
URL=$BASE_URL/$RELEASE/x86_64/e/
;;
*)
echo "$DISTRO_NAME is not supported"
exit 1
;;
esac
PKG_NAME=$(wget -q $URL -O - |grep -oE "(href=\"epel-release-$RELEASE-[0-9,.].*)" | cut -d'"' -f2)
rpm -q epel-release || yum install -y $URL/$PKG_NAME
fi
if [ ${DIB_EPEL_DISABLED:-0} -ne 0 ]; then
yum-config-manager --disable epel
fi
DIB_EPEL_MIRROR=${DIB_EPEL_MIRROR:-}
[ -n "$DIB_EPEL_MIRROR" ] || exit 0
# Set the EPEL mirror to use
sed -e "s|^#baseurl=http://download.fedoraproject.org/pub/epel|baseurl=$DIB_EPEL_MIRROR|;/^mirrorlist=/d" -i /etc/yum.repos.d/epel.repo