A.6. The VDSM Hook Domain XML Object
_hook_domxmlvariable is appended to the environment. This variable contains the path of the libvirt domain XML representation of the relevant virtual machine. Several hooks are an exception to this rule, as outlined below.
_hook_domxmlvariable of the following hooks contains the XML representation of the NIC and not the virtual machine.
before_dehibernationhooks currently receive the XML of the domain from the source host. The XML of the domain at the destination will have various differences.