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11.3. Managing automatic boot source updates

You can manage automatic updates for the following boot sources:

Boot sources can make virtual machine (VM) creation more accessible and efficient for users. If automatic boot source updates are enabled, the Containerized Data Importer (CDI) imports, polls, and updates the images so that they are ready to be cloned for new VMs. By default, CDI automatically updates Red Hat boot sources.

11.3.1. Managing Red Hat boot source updates
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You can opt out of automatic updates for all system-defined boot sources by setting the enableCommonBootImageImport field value to false. If you set the value to false, all DataImportCron objects are deleted. This does not, however, remove previously imported boot source objects that store operating system images, though administrators can delete them manually.

When the enableCommonBootImageImport field value is set to false, DataSource objects are reset so that they no longer point to the original boot source. An administrator can manually provide a boot source by creating a new persistent volume claim (PVC) or volume snapshot for the DataSource object, and then populating it with an operating system image.

11.3.1.1. Managing automatic updates for all system-defined boot sources
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Disabling automatic boot source imports and updates can lower resource usage. In disconnected environments, disabling automatic boot source updates prevents CDIDataImportCronOutdated alerts from filling up logs.

To disable automatic updates for all system-defined boot sources, set the enableCommonBootImageImport field value to false. Setting this value to true turns automatic updates back on.

참고

Custom boot sources are not affected by this setting.

Prerequisites

  • You have installed the OpenShift CLI (oc).

Procedure

  • Enable or disable automatic boot source updates by editing the HyperConverged custom resource (CR).

    • To disable automatic boot source updates, set the spec.enableCommonBootImageImport field value in the HyperConverged CR to false. For example: 

      $ oc patch hyperconverged kubevirt-hyperconverged -n openshift-cnv \
  --type json -p '[{"op": "replace", "path": \
  "/spec/enableCommonBootImageImport", \
  "value": false}]'

    • To re-enable automatic boot source updates, set the spec.enableCommonBootImageImport field value in the HyperConverged CR to true. For example: 

      $ oc patch hyperconverged kubevirt-hyperconverged -n openshift-cnv \
  --type json -p '[{"op": "replace", "path": \
  "/spec/enableCommonBootImageImport", \
  "value": true}]'
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