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2.17. Example: Attaching an ISO Image to a Virtual Machine using Python

To begin installing a guest operating system on a newly created virtual machine you must attach an ISO file containing the operating system installation media.

Example 2.16. Identifying ISO images

ISO images are found in the files collection attached to the ISO storage domain. This example lists the contents of the files collection on an ISO storage domain.

from ovirtsdk.api import API 
from ovirtsdk.xml import params

try:
    api = API(url="https://HOST",
              username="USER@DOMAIN",
              password="PASS",
              ca_file="ca.crt")

    sd = api.storagedomains.get(name="iso1")
    iso = sd.files.list()

    for i in iso:
        print "%s" % i.get_name()
		
except Exception as ex:
    print "Unexpected error: %s" % ex

from ovirtsdk.api import API 
from ovirtsdk.xml import params

try:
    api = API(url="https://HOST",
              username="USER@DOMAIN",
              password="PASS",
              ca_file="ca.crt")

    sd = api.storagedomains.get(name="iso1")
    iso = sd.files.list()

    for i in iso:
        print "%s" % i.get_name()
		
except Exception as ex:
    print "Unexpected error: %s" % ex

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If successful the script will output an entry like this for each file found in the files collection:

RHEL6.3-Server-x86_64-DVD1.iso

RHEL6.3-Server-x86_64-DVD1.iso

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Note that because files on the ISO domain must be uniquely named the id and name attributes of the file are shared.

Example 2.17. Attaching an ISO image to a virtual machine using Python

This Python example attaches the RHEL6.3-Server-x86_64-DVD1.iso ISO image file to the vm1 virtual machine. Once identified the image file is attached using the add method of the virtual machine's cdroms collection.

from ovirtsdk.api import API 
from ovirtsdk.xml import params

try:
    api = API(url="https://HOST",
              username="USER@DOMAIN",
              password="PASS,
              ca_file="ca.crt")

    sd = api.storagedomains.get(name="iso1")

    cd_iso = sd.files.get(name="RHEL6.3-Server-x86_64-DVD1.iso")
    cd_vm = api.vms.get(name="vm1")
    cd_params = params.CdRom(file=cd_iso)

    try:
        cd_vm.cdroms.add(cd_params)
        print "Attached CD to '%s'." % cd_vm.get_name()
    except Exception as ex:
        print "Failed to attach CD to '%s': %s" % (cd_vm.get_name(), ex)

    api.disconnect()

except Exception as ex:
    print "Unexpected error: %s" % ex

from ovirtsdk.api import API 
from ovirtsdk.xml import params

try:
    api = API(url="https://HOST",
              username="USER@DOMAIN",
              password="PASS,
              ca_file="ca.crt")

    sd = api.storagedomains.get(name="iso1")

    cd_iso = sd.files.get(name="RHEL6.3-Server-x86_64-DVD1.iso")
    cd_vm = api.vms.get(name="vm1")
    cd_params = params.CdRom(file=cd_iso)

    try:
        cd_vm.cdroms.add(cd_params)
        print "Attached CD to '%s'." % cd_vm.get_name()
    except Exception as ex:
        print "Failed to attach CD to '%s': %s" % (cd_vm.get_name(), ex)

    api.disconnect()

except Exception as ex:
    print "Unexpected error: %s" % ex

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If the add request is successful then the script will output:

Attached CD to 'vm1'.

Attached CD to 'vm1'.

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Note

This procedure is for attaching an ISO image to virtual machines with a status of Down. To attach an ISO to a virtual machine with an Up status, amend the second try statement to the following:

try:
	cdrom=cd_vm.cdroms.get(id="00000000-0000-0000-0000-000000000000")
	cdrom.set_file(cd_iso)
	cdrom.update(current=True)
	print "Attached CD to '%s'." % cd_vm.get_name()
except:
	print "Failed to attach CD to '%s': %s" % (cd_vm.get_name(), ex)

try:
	cdrom=cd_vm.cdroms.get(id="00000000-0000-0000-0000-000000000000")
	cdrom.set_file(cd_iso)
	cdrom.update(current=True)
	print "Attached CD to '%s'." % cd_vm.get_name()
except:
	print "Failed to attach CD to '%s': %s" % (cd_vm.get_name(), ex)

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Example 2.18. Ejecting a cdrom from a Virtual Machine using Python

Eject an ISO from a virtual machine's cdrom collection.

from ovirtsdk.api import API 
from ovirtsdk.xml import params

try:
    api = API(url="https://HOST",
              username="USER@DOMAIN",
              password="PASS,
              ca_file="ca.crt")

    sd = api.storagedomains.get(name="iso1")
    vm = api.vms.get(name="vm1")

    try:
        vm.cdroms.get(id="00000000-0000-0000-0000-000000000000").delete()
        print "Removed CD from '%s'." % vm.get_name()
    except Exception as ex:
        print "Failed to remove CD from '%s': %s" % (vm.get_name(), ex)

    api.disconnect()

except Exception as ex:
    print "Unexpected error: %s" % ex

from ovirtsdk.api import API 
from ovirtsdk.xml import params

try:
    api = API(url="https://HOST",
              username="USER@DOMAIN",
              password="PASS,
              ca_file="ca.crt")

    sd = api.storagedomains.get(name="iso1")
    vm = api.vms.get(name="vm1")

    try:
        vm.cdroms.get(id="00000000-0000-0000-0000-000000000000").delete()
        print "Removed CD from '%s'." % vm.get_name()
    except Exception as ex:
        print "Failed to remove CD from '%s': %s" % (vm.get_name(), ex)

    api.disconnect()

except Exception as ex:
    print "Unexpected error: %s" % ex

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2.17. Example: Attaching an ISO Image to a Virtual Machine using Python

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