1 What is SUSE Linux Enterprise Server for SAP Applications? #

This resource agent from SUSE supports scale-up scenarios by checking the SAP HANA database instances for whether a takeover needs to happen. Unlike with the pure SAP solution, takeovers can be automated.

It is configured as a master/slave resource: The master assumes responsibility for the SAP HANA databases running in primary mode, whereas the slave is responsible for instances that are operated in synchronous (secondary) status. In case of a takeover, the secondary (slave resource instance) can automatically be promoted to become the new primary (master resource instance).

This resource agent supports system replication for the following scale-up scenarios:

For all of the scenarios, SUSE Linux Enterprise Server for SAP Applications supports both single-tenant and multi-tenant (MDC) SAP HANA databases. That is, you can use SAP HANA databases that serve multiple SAP applications.

To make configuring the cluster as simple as possible, SUSE has developed the SAPHanaTopology resource agent. This agent runs on all nodes of a SUSE Linux Enterprise High Availability Extension cluster and gathers information about the status and configurations of SAP HANA system replications. It is designed as a normal (stateless) clone.

SUSE Linux Enterprise Server for SAP Applications now additionally ships a YaST wizard that manages the initial setup of such clusters according to best practices. The wizard is part of the package yast2-sap-ha and can be started using YaST, via HA Setup for SAP Products.

For more information, see Chapter 7, Setting up an SAP HANA cluster.

For more information, see:

Securing SAP HANA can require many additional firewall rules. To simplify firewall setups for SAP HANA, SUSE Linux Enterprise Server for SAP Applications contains the package HANA-Firewall which provides preconfigured rules and integrates with firewalld.

For more information, see Section 11.2, “Configuring HANA-Firewall”.

For information on hardening the underlying operating system, see the SUSE Linux Enterprise Server for SAP Applications resource library: https://www.suse.com/products/sles-for-sap/resource-library/. There, find the document OS Security Hardening for SAP HANA.

The system tuning application saptune allows you to automatically and comprehensively tune your system as recommended by SAP for use with SAP S/4HANA, SAP NetWeaver, or SAP HANA/SAP BusinessOne. To do this, saptune activates tuned profiles. These allow tuning several kernel parameters, depending on the hardware components you are using, such as the amount of available RAM.

For more information, see Chapter 9, Tuning systems with saptune.

To simplify working with software dependencies of SAP applications, SUSE has created patterns that combine relevant dependency RPM packages for specific applications:

Important: Packages May Be Missing from Patterns

The selection of packages of the software patterns is defined while a specific release (Service Pack or major version) of SUSE Linux Enterprise Server for SAP Applications is developed. This package selection is stable over the lifetime of this particular release. When working with SAP applications that have been released more recently than your SUSE Linux Enterprise Server for SAP Applications version, dependencies can be missing from the patterns.

For definitive information about the dependencies of your SAP application, see the documentation provided to you by SAP.

ClusterTools2 provides tools that help set up and manage a Corosync/pacemaker cluster. Among them are wow which helps create highly available system resources, and ClusterService which allows managing a cluster.

Additionally, ClusterTools2 provides scripts that automate common cluster tasks:

For more information, see the man page of the respective tool, included with the package ClusterTools2.