You are planning the implementation of a Pacemaker cluster that will run Red Hat Enterprise Linux (RHEL) and host three SAP HANA nodes. You need to recommend a solution to ensure that a node is shut…

Question

Options

• Aan Azure Automation runbook
• Ban Azure fence agent configuration
• Ca virtual machine scale set in Flexible orchestration mode
• Da STONITH Block Device (SBD) with an iSCSI target

• A
  14% (5)
• B
  74% (26)
• C
  3% (1)
• D
  9% (3)

Explanation

An Azure fence agent configuration on a Pacemaker cluster on RHEL hosting three SAP HANA nodes can ensure a node is shut down in case of an issue. This is a standard high-availability setup where the fence agent uses Azure APIs to perform the STONITH (Shoot The Other Node In The Head) action, which isolates the failed node by shutting it down to prevent data corruption and split-brain scenarios. Fencing: Pacemaker uses a fencing mechanism to shut down a node that has failed. STONITH: This is the process used to ensure only one node is active. The Azure fence agent is the cloud-specific implementation of STONITH. Azure API: The fence agent uses a program (fence_azure_arm) that communicates with the Azure platform via API calls to power-off or restart the virtual machine. Permissions: For this to work, the Azure virtual machines must be configured with a custom role that grants the fence agent the necessary permissions to power off and start virtual machines. High Availability: By shutting down the problematic node, the cluster can fail over to a healthy node, maintaining service availability and preventing split-brain situations. https://learn.microsoft.com/en-us/azure/sap/workloads/high-availability-guide-rhel-pacemaker

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