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1.4. The Cluster and Pacemaker Configuration Files

The configuration files for the Red Hat High Availability add-on are corosync.conf and cib.xml.
The corosync.conf file provides the cluster parameters used by corosync, the cluster manager that Pacemaker is built on. In general, you should not edit the corosync.conf directly but, instead, use the pcs or pcsd interface. However, there may be a situation where you do need to edit this file directly. For information on editing the corosync.conf file, see Editing the corosync.conf file in Red Hat Enterprise Linux 7.
The cib.xml file is an XML file that represents both the cluster’s configuration and current state of all resources in the cluster. This file is used by Pacemaker's Cluster Information Base (CIB). The contents of the CIB are automatically kept in sync across the entire cluster Do not edit the cib.xml file directly; use the pcs or pcsd interface instead.
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