'Quiesce an instance on this host.'

@messaging.expected_exceptions(exception.InstanceQuiesceNotSupported, exception.QemuGuestAgentNotEnabled, exception.NovaException, NotImplementedError)
@wrap_exception()
def quiesce_instance(self, context, instance):

    context = context.elevated()
    image_meta = objects.ImageMeta.from_instance(instance)
    self.driver.quiesce(context, instance, image_meta)
