No support for live migration of active cluster nodes

This document (000020918) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise High Availability Extension

Situation

Is it supported to do a live migration of active cluster nodes ?

Resolution

We do not support the live migration of active pacemaker cluster nodes. It is possible to do but if the hypervisor causes a disruption that lasts too long it will result in node dropping out of the cluster and being fenced.

The proper way to migrate a pacemaker node would be to place the cluster in to maintenance mode ( crm maintenance on ), stop clustering on the node to be moved ( crm cluster stop ), migrate the VM, then start clustering again on the node that was moved ( crm cluster start ) and return from maintenance mode ( crm maintenance off ). 

Cause

The freeze/communication failure caused by the live migration is a heartbeat level failure and the node will be marked unhealthy and fenced regardless of maintenance status. Any resource agent failures/fencing/communication issues that arise from the migration of a running cluster node are not supported.

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:000020918
  • Creation Date: 24-Mar-2023
  • Modified Date:24-Mar-2023
    • SUSE Linux Enterprise High Availability Extension

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