Unable to find a name for a VHD to use for instance

Hi,

I'm trying to create a simple instance on Azure and I'm getting the exception as attached bellow.
I tried to consult with Azure support but they didn't find something problematic with all definitions that related to my Azure account.

Please note that I'm getting the location, the size and the image properly from the defined driver.

**from libcloud.compute.types import Provider
from libcloud.compute.providers import get_driver

cls = get_driver(Provider.AZURE_ARM)
driver = cls(tenant_id=tenant_id,
subscription_id=subscription_id,
key=app_id, secret=secret)
loc = [l for l in driver.list_locations() if l.id == default_zone ][0]
size = [s for s in driver.list_sizes(location=loc) if s.name == base_instance_size ][0]
ami = driver.get_image('Canonical:UbuntuServer:16.04-LTS:latest', location=loc)
node = driver.create_node("test_node",
... size=size,
... image=ami,
... location=loc,
... ex_resource_group=resource_group,
... ex_storage_account=storage_account,
... ex_network='iavn1011126702',
... ex_subnet='iasub1011126702',
... auth=None)**

Traceback (most recent call last):
File "", line 9, in
File "/usr/local/lib/python3.6/dist-packages/libcloud/compute/drivers/azure_arm.py", line 600, in create_node
ex_blob_container=ex_blob_container)
File "/usr/local/lib/python3.6/dist-packages/libcloud/compute/drivers/azure_arm.py", line 2298, in _get_instance_vhd
("\n - ".join(errors)))
libcloud.common.types.LibcloudError: 'Unexpected status code: 400'>
- 'Unexpected status code: 400'>
- 'Unexpected status code: 400'>
- 'Unexpected status code: 400'>
- 'Unexpected status code: 400'>
- 'Unexpected status code: 400'>
- 'Unexpected status code: 400'>
- 'Unexpected status code: 400'>
- 'Unexpected status code: 400'>
- 'Unexpected status code: 400'>">

what can be the problem here?

Thanks,
Moshik.

从 libcloud/compute/drivers/azure_arm.py 中的 create_node 和 _get_instance_vhd 开始，然后跟踪返回状态 400 的 AzureBlobsStorageDriver 调用。重现所示的 Azure ARM 实例创建流程，并确定失败的 VHD 名称或 blob 请求；当原因明确到可以采取具体行动，且实例创建路径能够正确处理该问题时，即完成。

由索引模型根据 Issue 内容生成。