add: new wrapper to migrate libvirt vm

            raise VMError('deletion of VM `%s` failed' % self.get_name())

        self._hv_handle._cache_vm_rebuild()

    def migrate(self, host, port):

        '''

        '''

        if self.hypervisor().get_hv_type() == 'xen':

            flags = (libvirt.VIR_MIGRATE_LIVE ^

                    libvirt.VIR_MIGRATE_PERSIST_DEST ^

                    libvirt.VIR_MIGRATE_UNDEFINE_SOURCE)

            uri = 'xenmigr://%s:%d' % (host, port)

        else:

            flags = (libvirt.VIR_MIGRATE_LIVE ^

                    libvirt.VIR_MIGRATE_PERSIST_DEST ^

                    libvirt.VIR_MIGRATE_UNDEFINE_SOURCE ^

                    libvirt.VIR_MIGRATE_PEER2PEER ^

                    libvirt.VIR_MIGRATE_TUNNELLED)

            uri = 'qemu+tcp://%s:%d/system' % (host, port)

        try:

            self._domain.migrate(self._hv_handle._lvcon_handle, flags, None, uri, 0)

        except libvirt.libvirtError as err:

            # FIXME ignore bogus exception properly

            if not ('no domain with matching name' in err.message

                                    or 'Domain not found' in err.message):

                raise err

    def power_on(self):

        '''

        '''