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Configuring CDI to work with namespaces that have a compute resource quota

You can use the Containerized Data Importer (CDI) to import, upload, and clone virtual machine disks into namespaces that are subject to CPU and memory resource restrictions.

About CPU and memory quotas in a namespace

A resource quota, defined by the ResourceQuota object, imposes restrictions on a namespace that limit the total amount of compute resources that can be consumed by resources within that namespace.

The CDIConfig object defines the user configuration for the Containerized Data Importer (CDI). The CPU and memory request and limit values for the CDIConfig object are set to a default value of 0. This ensures that pods created by CDI that make no compute resource requirements are given the default values and are allowed to run in a namespace that is restricted with a quota.

Editing the CDIConfig object to override CPU and memory defaults

Modify the default settings for CPU and memory requests and limits for your use case by editing the spec attribute of the CDIConfig object.

Prerequisites

  • Install the OpenShift CLI (oc).

Procedure

  1. Edit the cdiconfig/config by running the following command:

    $ oc edit cdiconfig/config

  2. Change the default CPU and memory requests and limits by editing the spec: podResourceRequirements property of the CDIConfig object:

    apiVersion: cdi.kubevirt.io/v1alpha1
kind: CDIConfig
metadata:
  labels:
    app: containerized-data-importer
    cdi.kubevirt.io: ""
  name: config
spec:
    podResourceRequirements:
    limits:
      cpu: "4"
      memory: "1Gi"
    requests:
      cpu: "1"
      memory: "250Mi"
...

  3. Save and exit the editor to update the CDIConfig object.

Verification

  • View the CDIConfig status and verify your changes by running the following command:

    $ oc get cdiconfig config -o yaml

Additional resources