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Debugging CDI

Introduction

There are various instrumentations available for developers debugging CDI. We will keep expanding this document to make our life easier.

DataVolume annotation to retain the transfer pods after completion

Adding the annotation cdi.kubevirt.io/storage.pod.retainAfterCompletion: "true" will cause CDI transfer pods (importer, uploader, cloner) to be retained after a successful or failed completion. This makes debugging and testing easier, as developers can get the pod state and logs after completion. The pods will be deleted when their dv/pvc is deleted, otherwise the user is responsible for deleting them.

For example:

apiVersion: cdi.kubevirt.io/v1beta1
kind: DataVolume
metadata:
  name: dv-pod-retain
  annotations:
      cdi.kubevirt.io/storage.pod.retainAfterCompletion: "true"
spec:
  source:
      http:
         url: "http://mirrors.nav.ro/fedora/linux/releases/33/Cloud/x86_64/images/Fedora-Cloud-Base-33-1.2.x86_64.qcow2"
  pvc:
    accessModes:
      - ReadWriteOnce
    resources:
      requests:
        storage: 1Gi