Install Pacemaker ships as part of the Red Hat High Availability Add-on. The easiest way to try it out on RHEL is to install it from the Scientific Linux or CentOS repositories. If you are already running CentOS or Scientific Linux, you can skip this step. Otherwise, to teach the machine where to find the CentOS packages, run: [ALL] # cat < /etc/yum.repos.d/centos.repo [centos-7-base] name=CentOS-