Skip to content

OpenShift Virtualization (CNV/KubeVirt)

My lab environment

build with hetzner-ocp4

Containerized Data Importer (CDI) / DataVolume

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
apiVersion: cdi.kubevirt.io/v1alpha1
kind: DataVolume
metadata:
  name: registry-image-datavolume
spec:
  pvc:
    accessModes:
    - ReadWriteMany
    resources:
      requests:
        storage: 5Gi
  source:
    registry:
      url: docker://image-registry.openshift-image-registry.svc:5000/cnv-demo/build-vm-image-container:latest
      certConfigMap: "tls-certs"

Source: cdi-examples

OpenShift Virtualization & Container Storage

Recommended storage settings: 

1
2
3
4
5
6
7
8
$ oc edit cm kubevirt-storage-class-defaults -n openshift-cnv

accessMode: ReadWriteMany
ocs-storagecluster-ceph-rbd.accessMode: ReadWriteMany
ocs-storagecluster-ceph-rbd.volumeMode: Block
ocs-storagecluster-cephfs.accessMode: ReadWriteMany
ocs-storagecluster-cephfs.volumeMode: Filesystem
volumeMode: Block

Build container image with OS disk

1
2
3
oc new-build --name cirros \
    --build-arg image_url=http://download.cirros-cloud.net/0.5.1/cirros-0.5.1-x86_64-disk.img \
    https://github.com/openshift-examples/cnv-container-disk-build.git

Local IIS build in my lab

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
qemu-img convert -f raw -O qcow2 disk.img iis.qcow2

cat - > Dockerfile <<EOF
FROM scratch
LABEL maintainer="Robert Bohne <robert.bohne@redhat.com>"
ADD iis.qcow2 /disk/rhel.qcow2
EOF


oc create is iis -n cnv

export REGISTRY=$(oc get route default-route -n openshift-image-registry --template='{{ .spec.host }}')
export REGISTRY_TOKEN=$(oc whoami -t)
podman login -u $(oc whoami) -p $REGISTRY_TOKEN --tls-verify=false $HOST

podman build -t ${REGISTRY}/cnv/iis:latest .
podman push ${REGISTRY}/cnv/iis:latest

# Deploy template
oc apply -f https://raw.githubusercontent.com/openshift-examples/web/master/content/kubevirt/iis-template.yaml

Resources and useful articles

Last update: May 18, 2021