Description of problem:
Failed to bindmount hotplug-disk for hostpath-provisioner

Version-Release number of selected component (if applicable):
CNV4.8
virtctl-4.8.0-200.el7.x86_64.rpm


How reproducible:
Always

Steps to Reproduce:
1. Create a VM
---
apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
  labels:
    kubevirt.io/vm: fedora
  name: fedora-1619697674-6212
spec:
  template:
    metadata:
      labels:
        kubevirt.io/vm: fedora-1619697674-6212
        kubevirt.io/domain: fedora-1619697674-6212
    spec:
      domain:
        cpu:
          cores: 1
        devices:
          disks:
          - disk:
              bus: virtio
            name: containerdisk
          - disk:
              bus: virtio
            name: cloudinitdisk
          interfaces:
          - masquerade: {}
            name: default
          rng: {}
        machine:
          type: ''
        resources:
          requests:
            memory: 1024Mi
      networks:
      - name: default
        pod: {}
      terminationGracePeriodSeconds: 30
      volumes:
      - containerDisk:
          image: quay.io/openshift-cnv/qe-cnv-tests-fedora:33
        name: containerdisk
      - name: cloudinitdisk
        cloudInitNoCloud:
          userData: |-
            #cloud-config
            password: fedora
            chpasswd: { expire: False }      
  running: true

2. Create a blank dv
---
apiVersion: cdi.kubevirt.io/v1beta1
kind: DataVolume
metadata:
  name: blank-dv
spec:
  source:
    blank: {}
  pvc:
    accessModes:
      - ReadWriteOnce
    resources:
      requests:
        storage: 1Gi
    storageClassName: hostpath-provisioner
    volumeMode: Filesystem

3. Hotplug the volume to the VMI
# virtctl addvolume fedora-1619697674-6212 --volume-name=blank-dv

Actual results:
$ oc get vmi -o yaml
--------------8<---------------
   volumeStatus:
    - hotplugVolume:
        attachPodName: hp-volume-q8chb
        attachPodUID: ce44311f-a4a2-4c49-90b7-66a83699633e
      message: Created hotplug attachment pod hp-volume-q8chb, for volume blank-dv
      name: blank-dv
      phase: AttachedToNode
      reason: SuccessfulCreate
      target: ""
--------------8<---------------



Expected results:
hotplug volume works well for hostpath-provisioner



Additional info:

Log from virt-handler pod:

{"component":"virt-handler","kind":"","level":"error","msg":"Synchronizing the VirtualMachineInstance failed.","name":"fedora-1619697674-6212","namespace":"test-hhhh","pos":"vm.go:1549","reason":"failed to bindmount hotplug-disk blank-dv: Error: no such file or directory\nUsage:\n  virt-chroot mount [flags]\n\nFlags:\n  -h, --help             help for mount\n  -o, --options string   comma separated list of mount options\n  -t, --type string      fstype\n\nGlobal Flags:\n      --cpu uint32      cpu time in seconds for the process\n      --memory uint32   memory in megabyte for the process\n      --mount string    mount namespace to use\n      --user string     switch to this targetUser to e.g. drop privileges\n\nno such file or directory\n : exit status 1","timestamp":"2021-04-29T13:03:26.391004Z","uid":"1c19f8b7-0f18-48ff-809b-bb2487cc3fc2"}
{"component":"virt-handler","level":"info","msg":"re-enqueuing VirtualMachineInstance test-hhhh/fedora-1619697674-6212","pos":"vm.go:1206","reason":"failed to bindmount hotplug-disk blank-dv: Error: no such file or directory\nUsage:\n  virt-chroot mount [flags]\n\nFlags:\n  -h, --help             help for mount\n  -o, --options string   comma separated list of mount options\n  -t, --type string      fstype\n\nGlobal Flags:\n      --cpu uint32      cpu time in seconds for the process\n      --memory uint32   memory in megabyte for the process\n      --mount string    mount namespace to use\n      --user string     switch to this targetUser to e.g. drop privileges\n\nno such file or directory\n : exit status 1","timestamp":"2021-04-29T13:03:26.400897Z"}