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Update rhel7 element readme

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Evidently the readme file hasn't been updated since rhel7 finished
beta, so this is long overdue.

In addition, since it's not possible to download the base image
file directly, let's stop pretending we can and bail out if the user
didn't set the necessary env vars.

Also updated the README to use the new table format instead of free text

Co-Authored-By: Augustina Ragwitz <aragwitz+lp@pobox.com>
Change-Id: Ie8343ee2ce1715583c28de7f59daed7e58c8ca0f
This commit is contained in:
Ben Nemec 2015-09-10 15:09:48 -05:00
parent b544e91494
commit e23274921d
2 changed files with 31 additions and 7 deletions
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31
elements/rhel7/README.rst
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@ -3,9 +3,30 @@ rhel7
=====
Use RHEL 7 cloud images as the baseline for built disk images.
Note: As of this writing, RHEL 7 is still in beta, so final download
locations are not available. This element defaults to using the RHEL 6.5
image, but that will need to be overridden using the appropriate DIB_*
environment variables to point at a RHEL 7 image.
Because RHEL 7 base images are not publicly available, it is necessary to first
download the RHEL 7 cloud image from the Red Hat Customer Portal and pass the
path to the resulting file to disk-image-create as the ``DIB_LOCAL_IMAGE``
environment variable.
For further details see the redhat-common README.
The cloud image can be found at (login required):
https://access.redhat.com/downloads/content/69/ver=/rhel---7/7.1/x86_64/product-downloads
Then before running the image build, define DIB_LOCAL_IMAGE (replace the file
name with the one downloaded, if it differs from the example)::
export DIB_LOCAL_IMAGE=rhel-guest-image-7.1-20150224.0.x86_64.qcow2
The downloaded file will then be used as the basis for any subsequent image
builds.
For further details about building RHEL 7 images, see the rhel-common and
redhat-common element README files.
Environment Variables
---------------------
DIB_LOCAL_IMAGE
:Required: Yes
:Default: None
:Description: The RHEL 7 base image you have downloaded. See the element
description above for more details.
:Example: ``DIB_LOCAL_IMAGE=/tmp/rhel7-cloud.qcow2``

7
elements/rhel7/root.d/10-rhel7-cloud-image
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@ -26,9 +26,12 @@ if [ -n "$DIB_LOCAL_IMAGE" ]; then
BASE_IMAGE_FILE=`basename $DIB_LOCAL_IMAGE`
BASE_IMAGE_TAR=$BASE_IMAGE_FILE.tgz
else
if [ -z "${BASE_IMAGE_FILE:-}" -o -z "${DIB_CLOUD_IMAGES}" ]; then
echo "No source for a base image file configured."
echo "See rhel7 element readme for details on how to obtain and use a base image."
exit 1
fi
DIB_RELEASE=${DIB_RELEASE:-latest}
DIB_CLOUD_IMAGES=${DIB_CLOUD_IMAGES:-http://rhn.redhat.com}
BASE_IMAGE_FILE=${BASE_IMAGE_FILE:-rhel-guest-image-7.0-20140506.1.x86_64.qcow2}
BASE_IMAGE_TAR=$DIB_RELEASE-rhel-server-$ARCH-latest.tgz
IMAGE_LOCATION=$DIB_CLOUD_IMAGES/$BASE_IMAGE_FILE
CACHED_IMAGE=$DIB_IMAGE_CACHE/$BASE_IMAGE_FILE