kubevirt: sidecar: add qemu-vdagent channel with clipboard

clipboard-configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: clipboard-configmap
data:
  my_script.sh: |
    #!/usr/bin/python3

    import xml.etree.ElementTree as ET
    import sys

    def add_source(channel):
        source = ET.fromstring(
            """
    <source>
        <mouse mode='client'/>
        <clipboard copypaste='yes'/>
    </source>
          """
        )
        channel.insert(len(channel), source)


    def add_channel(devices):
        channel = ET.fromstring(
            """
        <channel type='qemu-vdagent'>
          <target type='virtio' name='com.redhat.spice.0'/>
          <address type='virtio-serial' controller='1' bus='0' port='3'/>
          <source>
            <mouse mode='client'/>
            <clipboard copypaste='yes'/>
          </source>
        </channel>
    """
        )
        devices.insert(len(devices), channel)

    def add_client_clipboard(domainxml):
        root = ET.fromstring(domainxml)
        devices = root.find("devices")
        for channel in devices.findall("channel"):
            ctype = channel.attrib.get("type")
            if ctype is None or ctype != "qemu-vdagent":
                continue

            # There is already qemu-vdagent channel definition
            source = channel.find("source")
            if source is not None:
                # Source already exists. Delete its content and
                # Add content with clipboard enabled.
                channel.remove(source)

            add_source(channel)
            ET.dump(root)
            return

        add_channel(devices)
        ET.dump(root)

    if __name__ == "__main__":
        add_client_clipboard(sys.argv[4])

vmi-pvc.yaml

---
apiVersion: kubevirt.io/v1
kind: VirtualMachineInstance
metadata:
  annotations:
    hooks.kubevirt.io/hookSidecars: '[{"args": ["--version", "v1alpha3"], "image":"kubevirt/sidecar-shim:20240108_99b6c4bdb",
          "configMap": {"name": "clipboard-configmap","key": "my_script.sh", "hookPath": "/usr/bin/onDefineDomain"}}]'
  labels:
    special: vmi-pvc
  name: vmi-pvc
spec:
  domain:
    devices:
      disks:
      - disk:
          bus: virtio
        name: pvcdisk
    resources:
      requests:
        memory: 1Gi
  terminationGracePeriodSeconds: 0
  volumes:
  - name: pvcdisk
    persistentVolumeClaim:
      claimName: fedora-pvc