RH445 Red Hat High Availability Clustering for SAP Solutions — Lesson 1: SAP Availability Architecture, Cluster Prerequisites, Pacemaker, and Corosync

Learning Objectives

• Interpret the architecture, dependencies, and expected behavior of SAP workload dependencies, availability objectives, and Pacemaker and Corosync.
• Apply cluster communication and node preparation while preserving reviewable technical evidence.
• Recognize and correct the risk where a hidden prerequisite causes the first configuration step to produce an incomplete result.

Detailed Topics

• SAP workload dependencies: apply the concept to an SAP operations team protecting critical application and database services across a clustered RHEL platform, record the relevant settings or decisions, and explain the operational consequence.
• availability objectives: apply the concept to an SAP operations team protecting critical application and database services across a clustered RHEL platform, record the relevant settings or decisions, and explain the operational consequence.
• Pacemaker and Corosync: apply the concept to an SAP operations team protecting critical application and database services across a clustered RHEL platform, record the relevant settings or decisions, and explain the operational consequence.
• cluster communication: apply the concept to an SAP operations team protecting critical application and database services across a clustered RHEL platform, record the relevant settings or decisions, and explain the operational consequence.
• node preparation: apply the concept to an SAP operations team protecting critical application and database services across a clustered RHEL platform, record the relevant settings or decisions, and explain the operational consequence.

Instructor Demonstration

The instructor demonstrates sap availability architecture, cluster prerequisites, pacemaker, and corosync by tracing the relevant architecture, commands, configuration, messages, and evidence. The walkthrough highlights how a hidden prerequisite causes the first configuration step to produce an incomplete result and shows how to isolate the cause without masking dependent issues.

Hands-On Exercise

Build a baseline and capture the initial state for SAP Availability Architecture, Cluster Prerequisites, Pacemaker, and Corosync. Add verified outcomes to the SAP cluster architecture, tested resource configuration, failover evidence, and recovery runbook.

1. Confirm the scope, versions, access, dependencies, and success criteria.
2. Perform the workflow while recording commands, settings, output, and platform events.
3. Test one expected case and one controlled exception specific to this lesson.
4. Retest the correction and document ownership, rollback, and follow-up actions.

Scenario Analysis

• Identify which dependency most strongly influences SAP workload dependencies in the stated scenario.
• Compare two approaches for cluster communication and explain the security, reliability, and support trade-offs.
• Decide what evidence must be retained in the SAP cluster architecture, tested resource configuration, failover evidence, and recovery runbook before operational acceptance.

Troubleshooting Guidance

Begin with the first observable difference from the expected result. Check architecture, access, dependencies, and starting conditions separately, then correlate logs, events, commands, and configuration history. Do not accept the initial assumption that a hidden prerequisite causes the first configuration step to produce an incomplete result; confirm the cause with a reproducible retest.

Validation Checklist

• The required architecture, access, dependencies, and starting conditions were checked and recorded.
• The normal path and a course-specific exception were tested.
• The SAP cluster architecture, tested resource configuration, failover evidence, and recovery runbook links conclusions to commands, configuration, logs, or other objective evidence.
• Corrective actions, rollback steps, ownership, and handover notes are complete.

Lesson Outcome

Learners can apply SAP Availability Architecture, Cluster Prerequisites, Pacemaker, and Corosync, explain the observed Red Hat platform behavior, and support the result with a reviewable SAP cluster architecture, tested resource configuration, failover evidence, and recovery runbook.