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openshift-docs/modules/virt-understanding-node-maintenance.adoc

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// Module included in the following assemblies:
//
// * virt/node_maintenance/virt-node-maintenance.adoc
// * virt/node_maintenance/virt-setting-node-maintenance.adoc
[id="virt-understanding-node-maintenance{context}"]
= Understanding node maintenance mode
Placing a node into maintenance marks the node as unschedulable and drains all
the virtual machines and pods from it. Virtual machine instances that have a
`LiveMigrate` eviction strategy are live migrated to another node without loss
of service. This eviction strategy is configured by default in virtual machine
created from common templates but must be configured manually for custom
virtual machines.
Virtual machine instances without an eviction strategy will be deleted on the
node and recreated on another node.
[IMPORTANT]
====
Virtual machines must have a persistent volume claim (PVC) with a shared
ReadWriteMany (RWX) access mode to be live migrated.
====