Remark: As the SCN space business continuity has been closed and my article could not be moved to the ALM, I re-provide my document here.
Running SAP in a high availability cluster environment needs additional interfaces to communicate between the SAP program sapstartsrv and the high availability cluster. At least it is essential to inform the cluster, if a SAP instance is started or shutdown. This article describes the reference interface implementation sap_suse_cluster_connector
See my Blog Using SAPInstance to control non-productive SAP HANA database in the cost-optimized scenario for details.
The SCN document Manual Page of sap_vendor_cluster_connector is intended as a manual page for the script connector to be shipped by the HA solution vendor.
The following diagram shows a sample cluster integration using the SUSE Linux Enterprise High Availability Extension: