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Use Azure Managed Disks with the Azure libraries (SDK) for Python

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Azure Managed Disks provide a simplified disk management, enhanced scalability, better security, and better scaling without having to work directly with storage accounts.

You use the azure-mgmt-compute library to administer Managed Disks. (For an example of provisioning a virtual machine with the azure-mgmt-compute library, see Example - Provision a virtual machine.)

Standalone Managed Disks

You can create standalone Managed Disks in a number of ways as illustrated in the following sections.

Create an empty Managed Disk

from azure.mgmt.compute.models import DiskCreateOption

poller = compute_client.disks.begin_create_or_update(
    'my_resource_group',
    'my_disk_name',
    {
        'location': 'eastus',
        'disk_size_gb': 20,
        'creation_data': {
            'create_option': DiskCreateOption.empty
        }
    }
)
disk_resource = poller.result()

Create a Managed Disk from blob storage

from azure.mgmt.compute.models import DiskCreateOption

poller = compute_client.disks.begin_create_or_update(
    'my_resource_group',
    'my_disk_name',
    {
        'location': 'eastus',
        'creation_data': {
            'create_option': DiskCreateOption.import_enum,
            'source_uri': 'https://bg09.blob.core.windows.net/vm-images/non-existent.vhd'
        }
    }
)
disk_resource = poller.result()

Create a Managed Disk image from blob storage

from azure.mgmt.compute.models import DiskCreateOption

poller = compute_client.images.begin_create_or_update(
    'my_resource_group',
    'my_image_name',
    {
        'location': 'eastus',
        'storage_profile': {
           'os_disk': {
              'os_type': 'Linux',
              'os_state': "Generalized",
              'blob_uri': 'https://bg09.blob.core.windows.net/vm-images/non-existent.vhd',
              'caching': "ReadWrite",
           }
        }
    }
)
image_resource = poller.result()

Create a Managed Disk from your own image

from azure.mgmt.compute.models import DiskCreateOption

# If you don't know the id, do a 'get' like this to obtain it
managed_disk = compute_client.disks.get(self.group_name, 'myImageDisk')

poller = compute_client.disks.begin_create_or_update(
    'my_resource_group',
    'my_disk_name',
    {
        'location': 'eastus',
        'creation_data': {
            'create_option': DiskCreateOption.copy,
            'source_resource_id': managed_disk.id
        }
    }
)

disk_resource = poller.result()

Virtual machine with Managed Disks

You can create a Virtual Machine with an implicit Managed Disk for a specific disk image, which relieves you from specifying all the details.

A Managed Disk is created implicitly when creating VM from an OS image in Azure. In the storage_profile parameter, the os_disk is optional and you don't have to create a storage account as required precondition to create a Virtual Machine.

storage_profile = azure.mgmt.compute.models.StorageProfile(
    image_reference = azure.mgmt.compute.models.ImageReference(
        publisher='Canonical',
        offer='UbuntuServer',
        sku='16.04-LTS',
        version='latest'
    )
)

For a complete example on how to create a virtual machine using the Azure management libraries, for Python, see Example - Provision a virtual machine.

You can also create a storage_profile from your own image:

# If you don't know the id, do a 'get' like this to obtain it
image = compute_client.images.get(self.group_name, 'myImageDisk')

storage_profile = azure.mgmt.compute.models.StorageProfile(
    image_reference = azure.mgmt.compute.models.ImageReference(
        id = image.id
    )
)

You can easily attach a previously provisioned Managed Disk.:

vm = compute.virtual_machines.get(
    'my_resource_group',
    'my_vm'
)
managed_disk = compute_client.disks.get('my_resource_group', 'myDisk')

vm.storage_profile.data_disks.append({
    'lun': 12, # You choose the value, depending of what is available for you
    'name': managed_disk.name,
    'create_option': DiskCreateOptionTypes.attach,
    'managed_disk': {
        'id': managed_disk.id
    }
})

async_update = compute_client.virtual_machines.begin_create_or_update(
    'my_resource_group',
    vm.name,
    vm,
)
async_update.wait()

Virtual machine scale sets with Managed Disks

Before Managed Disks, you needed to create a storage account manually for all the VMs you wanted inside your Scale Set, and then use the list parameter vhd_containers to provide all the storage account name to the Scale Set RestAPI. (For a migration guide, see Convert a scale set template to a manage disk scale set template.)

Because you don't need to manage storage accounts with Azure Managed Disks, your storage_profile can now be exactly the same as the one used in VM creation:

'storage_profile': {
    'image_reference': {
        "publisher": "Canonical",
        "offer": "UbuntuServer",
        "sku": "16.04-LTS",
        "version": "latest"
    }
},

The full sample is as follows:

naming_infix = "PyTestInfix"

vmss_parameters = {
    'location': self.region,
    "overprovision": True,
    "upgrade_policy": {
        "mode": "Manual"
    },
    'sku': {
        'name': 'Standard_A1',
        'tier': 'Standard',
        'capacity': 5
    },
    'virtual_machine_profile': {
        'storage_profile': {
            'image_reference': {
                "publisher": "Canonical",
                "offer": "UbuntuServer",
                "sku": "16.04-LTS",
                "version": "latest"
            }
        },
        'os_profile': {
            'computer_name_prefix': naming_infix,
            'admin_username': 'Foo12',
            'admin_password': 'BaR@123!!!!',
        },
        'network_profile': {
            'network_interface_configurations' : [{
                'name': naming_infix + 'nic',
                "primary": True,
                'ip_configurations': [{
                    'name': naming_infix + 'ipconfig',
                    'subnet': {
                        'id': subnet.id
                    }
                }]
            }]
        }
    }
}

# Create VMSS test
result_create = compute_client.virtual_machine_scale_sets.begin_create_or_update(
    'my_resource_group',
    'my_scale_set',
    vmss_parameters,
)
vmss_result = result_create.result()

Other operations with Managed Disks

Resizing a Managed Disk

managed_disk = compute_client.disks.get('my_resource_group', 'myDisk')
managed_disk.disk_size_gb = 25

async_update = self.compute_client.disks.begin_create_or_update(
    'my_resource_group',
    'myDisk',
    managed_disk
)
async_update.wait()

Update the storage account type of the Managed Disks

from azure.mgmt.compute.models import StorageAccountTypes

managed_disk = compute_client.disks.get('my_resource_group', 'myDisk')
managed_disk.account_type = StorageAccountTypes.standard_lrs

async_update = self.compute_client.disks.begin_create_or_update(
    'my_resource_group',
    'myDisk',
    managed_disk
)
async_update.wait()

Create an image from blob storage

async_create_image = compute_client.images.create_or_update(
    'my_resource_group',
    'myImage',
    {
        'location': 'westus',
        'storage_profile': {
            'os_disk': {
                'os_type': 'Linux',
                'os_state': "Generalized",
                'blob_uri': 'https://bg09.blob.core.windows.net/vm-images/non-existent.vhd',
                'caching': "ReadWrite",
            }
        }
    }
)
image = async_create_image.result()

Create a snapshot of a Managed Disk that is currently attached to a virtual machine

managed_disk = compute_client.disks.get('my_resource_group', 'myDisk')

async_snapshot_creation = self.compute_client.snapshots.begin_create_or_update(
        'my_resource_group',
        'mySnapshot',
        {
            'location': 'westus',
            'creation_data': {
                'create_option': 'Copy',
                'source_uri': managed_disk.id
            }
        }
    )
snapshot = async_snapshot_creation.result()

See also