Failed to create SRIOV instance because of "No valid host was found error message".

Issue

• Not able to create SRIOV instance, it's going into ERROR state with message No valid host was found.
• nova scheduler logs are filtering out all the compute nodes.
• Sufficient CPUs are available on NUMA node to which SRIOV interface belong hence ruling out the possibility of Bug mentioned in Red Hat Solution.
• nova flavor properties used in this scenario.

| extra_specs                | {"hw:cpu_model": "SandyBridge", "hw:numa_nodes": "1", "aggregate_instance_extra_spces:AZ1": "true", "hw:cpu_policy": "dedicated"} |

• This issue may also arise when spawning instance without SRIOV ports because this issue is mainly happening due to metadata cpu_policy: dedicated.