Comment 2 for bug 1851587

HypervisorUnavailable could probably crop up for any server action if the compute service is running but the hypervisor is down and it just blindly gets injected as an instance fault because of the @wrap_instance_fault decorator in the ComputeManager.

The fault details should be hidden from non-admin users but the message could probably be generically whitelisted and converted to something that doesn't contain the host name.