2.16. Example: Creating a Virtual Machine Storage Disk using Python

To ensure a newly created virtual machine has access to persistent storage you must create and attach a disk.

Example 2.15. Creating a virtual machine storage disk using Python

This Python example creates an 8 GB virtio disk drive and attaches it to the virtual machine named vm1. The disk in this example:

must be stored on the storage domain named data1,

disk_storage_domain = params.StorageDomains(storage_domain=[api.storagedomains.get(name="data1")])

disk_storage_domain = params.StorageDomains(storage_domain=[api.storagedomains.get(name="data1")])

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must be 8 GB in size,
```
disk_size = 8*1024*1024
```
```
disk_size = 8*1024*1024
```
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must be a system type disk (as opposed to data),
```
disk_type = "system"
```
```
disk_type = "system"
```
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must be virtio storage device,
```
disk_interface = "virtio"
```
```
disk_interface = "virtio"
```
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must be stored in cow format, and
```
disk_format = "cow"
```
```
disk_format = "cow"
```
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must be marked as a usable boot device.
```
disk_bootable = True
```
```
disk_bootable = True
```
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These options are combined into a disk parameter object, before using the add method of the virtual machine's disks collection to create the disk itself.

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")

    vm = api.vms.get(name="vm1")

    sd = params.StorageDomains(storage_domain=[api.storagedomains.get(name="data1")])
    disk_size = 8*1024*1024
    disk_type = "system"
    disk_interface = "virtio"
    disk_format = "cow"
    disk_bootable = True

    disk_params = params.Disk(storage_domains=sd,
                              size=disk_size,
                              type_=disk_type,
                              interface=disk_interface,
                              format=disk_format,
                              bootable=disk_bootable)

    try:
        d = vm.disks.add(disk_params)
        print "Disk '%s' added to '%s'." % (d.get_name(), vm.get_name())
    except Exception as ex:
        print "Adding disk to '%s' failed: %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")

    vm = api.vms.get(name="vm1")

    sd = params.StorageDomains(storage_domain=[api.storagedomains.get(name="data1")])
    disk_size = 8*1024*1024
    disk_type = "system"
    disk_interface = "virtio"
    disk_format = "cow"
    disk_bootable = True

    disk_params = params.Disk(storage_domains=sd,
                              size=disk_size,
                              type_=disk_type,
                              interface=disk_interface,
                              format=disk_format,
                              bootable=disk_bootable)

    try:
        d = vm.disks.add(disk_params)
        print "Disk '%s' added to '%s'." % (d.get_name(), vm.get_name())
    except Exception as ex:
        print "Adding disk to '%s' failed: %s" % (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:

Disk 'vm1_Disk1' added to 'vm1'.

Disk 'vm1_Disk1' added to 'vm1'.

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2.16. Example: Creating a Virtual Machine Storage Disk using Python

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