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#!/usr/bin/env python
# Copyright 2010 OpenStack LLC.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
XenAPI Plugin for transferring data between host nodes
"""
import utils
from pluginlib_nova import *
configure_logging('migration')
def move_vhds_into_sr(session, instance_uuid, sr_path, uuid_stack):
"""Moves the VHDs from their copied location to the SR."""
staging_path = "/images/instance%s" % instance_uuid
imported_vhds = utils.import_vhds(sr_path, staging_path, uuid_stack)
utils.cleanup_staging_area(staging_path)
return imported_vhds
def _rsync_vhds(instance_uuid, host, staging_path, user="root"):
ssh_cmd = '\"ssh -o StrictHostKeyChecking=no\"'
if not staging_path.endswith('/'):
staging_path += '/'
dest_path = '%s@%s:/images/instance%s/' % (user, host, instance_uuid)
rsync_cmd = "nohup /usr/bin/rsync -av -e %(ssh_cmd)s %(staging_path)s"\
" %(dest_path)s" % locals()
rsync_proc = utils.make_subprocess(rsync_cmd, stdout=True, stderr=True)
utils.finish_subprocess(rsync_proc, rsync_cmd)
def transfer_vhd(session, instance_uuid, host, vdi_uuid, sr_path, seq_num):
"""Rsyncs a VHD to an adjacent host."""
staging_path = utils.make_staging_area(sr_path)
try:
utils.prepare_staging_area(
sr_path, staging_path, [vdi_uuid], seq_num=seq_num)
_rsync_vhds(instance_uuid, host, staging_path)
finally:
utils.cleanup_staging_area(staging_path)
if __name__ == '__main__':
utils.register_plugin_calls(move_vhds_into_sr, transfer_vhd)
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