'Check to see if any resources have changed.'

def _resource_change(self, compute_node):

    nodename = compute_node.hypervisor_hostname
    old_compute = self.old_resources[nodename]
    if (not obj_base.obj_equal_prims(compute_node, old_compute, ['updated_at'])):
        self.old_resources[nodename] = copy.deepcopy(compute_node)
        return True
    return False
