High availability is a non-negotiable requirement for mission-critical SAP HANA deployments. When a primary database node goes down without an automated failover in place, the business impact is immediate. RHEL Pacemaker has long been the standard cluster manager for SAP HANA High Availability(HA) on Linux; it detects failures, fences misbehaving nodes, promotes secondaries, and orchestrates the full recovery sequence without manual intervention.
The standard Pacemaker playbook for SAP HANA HA, as documented in the official documentation, relies on a virtual IP address (VIP) as the single stable network endpoint for all database traffic. Pacemaker keeps that VIP tied to whichever node is currently the active primary. When a failover happens, the VIP moves. Applications reconnect to the same address and reach the new primary without configuration changes.
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