Description of problem:

When a libvirt server has VMs with other types of storage domains (block/raw, iSCSI, LVM but NOT file), when the user goes to Infrastructure -> Compute Resource -> <libvirt compute resource> -> <click over a VM>

~~~
getting " something went wrong undefined method `allocation' for nil:NilClass "
~~~

This issue is described here: https://github.com/fog/fog-libvirt/pull/105

However, that PR was never merged and ended being closed.

The patch proposed by such PR works and resolves the issue (no extended tests executed)

Version-Release number of selected component (if applicable):
Happens since 6.10 until now

How reproducible:

Always, when
Steps to Reproduce:
1. Create a VM with a volume of type different from file
2. Try going into the compute resource and see the properties of such VM

Actual results:

Error getting " something went wrong undefined method `allocation' for nil:NilClass "

Expected results:

Open the VM properties

Additional info: