This pattern explains the steps and considerations for upgrading an SAP Pacemaker cluster that is based on Standalone Enqueue Server (ENSA1) to ENSA2. The information in this pattern applies to both SUSE Linux Enterprise Server (SLES) and Red Hat Enterprise Linux (RHEL) operating systems.
Pacemaker clusters on SAP NetWeaver 7.52 or S/4HANA 1709 and earlier versions run on an ENSA1 architecture and are configured specifically for ENSA1. If you run your SAP workloads on Amazon Web Services (AWS) and you’re interested in moving to ENSA2, you might find that the SAP, SUSE, and RHEL documentation doesn’t provide comprehensive information. This pattern describes the technical steps required to reconfigure SAP parameters and Pacemaker clusters to upgrade from ENSA1 to ENSA2. It provides examples of SUSE systems, but the concept is the same for RHEL clusters.
