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77 lines
2.1 KiB
Plaintext
77 lines
2.1 KiB
Plaintext
// Module included in the following assembly:
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//
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// * virt/virtual_machines/advanced_vm_management/virt-activating-ksm.adoc
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//
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:_mod-docs-content-type: PROCEDURE
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[id="virt-configure-ksm-cli_{context}"]
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= Configuring KSM activation by using the CLI
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[role="_abstract"]
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You can enable or disable {VirtProductName}'s kernel samepage merging (KSM) activation feature by editing the `HyperConverged` custom resource (CR). Use this method if you want {VirtProductName} to activate KSM on only a subset of nodes.
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.Prerequisites
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* You have installed the {oc-first}.
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.Procedure
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. Open the `HyperConverged` CR in your default editor by running the following command:
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+
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[source,terminal,subs="attributes+"]
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----
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$ oc edit hyperconverged kubevirt-hyperconverged -n {CNVNamespace}
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----
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. Edit the `ksmConfiguration` stanza:
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* To enable the KSM activation feature for all nodes, set the `nodeLabelSelector` value to `{}`. For example:
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+
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[source,yaml,subs="attributes+"]
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----
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apiVersion: hco.kubevirt.io/v1beta1
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kind: HyperConverged
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metadata:
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name: kubevirt-hyperconverged
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namespace: {CNVNamespace}
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spec:
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configuration:
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ksmConfiguration:
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nodeLabelSelector: {}
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# ...
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----
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* To enable the KSM activation feature on a subset of nodes, edit the `nodeLabelSelector` field. Add syntax that matches the nodes where you want {VirtProductName} to enable KSM. For example, the following configuration allows {VirtProductName} to enable KSM on nodes where both `<first_example_key>` and `<second_example_key>` are set to `"true"`:
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+
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[source,yaml,subs="attributes+"]
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----
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apiVersion: hco.kubevirt.io/v1beta1
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kind: HyperConverged
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metadata:
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name: kubevirt-hyperconverged
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namespace: {CNVNamespace}
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spec:
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configuration:
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ksmConfiguration:
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nodeLabelSelector:
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matchLabels:
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<first_example_key>: "true"
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<second_example_key>: "true"
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# ...
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----
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* To disable the KSM activation feature, delete the `ksmConfiguration` stanza. For example:
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+
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[source,yaml,subs="attributes+"]
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----
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apiVersion: hco.kubevirt.io/v1beta1
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kind: HyperConverged
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metadata:
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name: kubevirt-hyperconverged
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namespace: {CNVNamespace}
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spec:
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configuration:
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# ...
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----
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. Save the file.
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