
instack runs this script on a system where epel has already been installed, which causes the yum command to fail. Only installing the epel-release rpm when it isn't already present addresses the issue. Change-Id: Ia179d7c7ed69ea5f785b5dcd16394c7663a145cc
This element installs the Extra Packages for Enterprise Linux (EPEL) repository GPG key as well as configuration for yum.