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Highly Available KVM Virtualization Using DRBD & Pacemaker Tech Guide

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ByMichael Troutman

One of the many use cases for DRBD® replication technology is to replicate a device that backs a storage volume that is in a backing storage role for a KVM virtual machine (VM) image. You can use this replication strategy, with Pacemaker configured as the cluster manager, to create a high-availability (HA) KVM virtualization solution.

Failing Over and Migrating the KVM Domain

After a failover event, Pacemaker will make available an up-to-date (thanks to DRBD) copy of the active KVM domain on a peer node in the cluster. This solution also makes it possible to migrate a KVM domain from one cluster node to another, using a single pcs resource move command!

RHEL 9 and AlmaLinux 9 How-to Guide Available

LINBIT® has recently updated a how-to technical guide with instructions on setting this solution up in a two-node cluster environment running Red Hat Enterprise Linux (RHEL) 9 or AlmaLinux 9

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Michael Troutman

Michael Troutman

Michael Troutman has an extensive background working in systems administration, networking, and technical support, and has worked with Linux since the early 2000s. Michael's interest in writing goes back to an avid reading filled childhood. Somewhere he still has the rejection letter from a publisher for a choose-your-own-adventure style novella, set in the world of a then popular science fiction role-playing game, cowritten with his grandmother (a romance novelist and travel writer) when at the tender age of 10. In the spirit of the open source community in which LINBIT thrives, Michael works as a Documentation Specialist to help LINBIT document its software and its many uses so that it may be widely understood and used.

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