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5.2. Specifying nodes for OpenShift Virtualization components

The default scheduling for virtual machines (VMs) on bare-metal nodes is appropriate. Optionally, you can specify the nodes where you want to deploy OpenShift Virtualization Operators, workloads, and controllers by configuring node placement rules.

참고

You can configure node placement rules for some components after installing OpenShift Virtualization, but virtual machines cannot be present if you want to configure node placement rules for workloads.

5.2.1. About node placement rules for OpenShift Virtualization components
링크 복사

You can use node placement rules for the following tasks:

  • Deploy virtual machines only on nodes intended for virtualization workloads.
  • Deploy Operators only on infrastructure nodes.
  • Maintain separation between workloads.

Depending on the object, you can use one or more of the following rule types:

nodeSelector
Allows pods to be scheduled on nodes that are labeled with the key-value pair or pairs that you specify in this field. The node must have labels that exactly match all listed pairs.
affinity
Enables you to use more expressive syntax to set rules that match nodes with pods. Affinity also allows for more nuance in how the rules are applied. For example, you can specify that a rule is a preference, not a requirement. If a rule is a preference, pods are still scheduled when the rule is not satisfied.
tolerations
Allows pods to be scheduled on nodes that have matching taints. If a taint is applied to a node, that node only accepts pods that tolerate the taint.
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