cnv.md

Container-native virtualization

Check nested virtualization at kvm-host (intel)

cat /sys/module/kvm_intel/parameters/nested

Enable nested virtualization at kvm-host (intel)

Adjust /etc/modprobe.d/kvm.conf

options kvm_intel nested=1

and reboot.

Options in your cluster.yml to enable nested virtualization

# Up to you ;-)
compute_count: 2
compute_vcpu: 8
master_vcpu: 8
# Important:
compute_special_cpu: "<cpu mode='host-passthrough'></cpu>"
master_special_cpu: "<cpu mode='host-passthrough'></cpu>"

If you want to use Advanced Cluster Security for Kubernetes you must also set the cpu mode host-passthrough. Otherwise, with the default vm settings, the central container will start with the error that the SSE 4.2 instruction set is not available.

Install CNV via OperatorHub

Follow the public documentation.

Examples

Start a VM from a PVC

oc create -f - <<EOF
apiVersion: kubevirt.io/v1alpha3
kind: VirtualMachine
metadata:
  labels:
    kubevirt.io/vm: windows
  name: windows
spec:
  running: false
  template:
    metadata:
      labels:
        kubevirt.io/vm: windows
    spec:
      domain:
        devices:
          disks:
          - name: windows
            disk: {}
          interfaces:
          - bridge: {}
            name: default
          - bridge: {}
            name: public
        machine:
          type: ""
        resources:
          requests:
            memory: 8092M
      terminationGracePeriodSeconds: 0
      networks:
      - name: default
        pod: {}
      - multus:
          networkName: extra-network-1
        name: public
      volumes:
      - name: windows
        persistentVolumeClaim:
          claimName: win19
EOF